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CN115263548A - Engine fire detection method and device, vehicle and storage medium - Google Patents

Engine fire detection method and device, vehicle and storage medium Download PDF

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Publication number
CN115263548A
CN115263548A CN202210345937.7A CN202210345937A CN115263548A CN 115263548 A CN115263548 A CN 115263548A CN 202210345937 A CN202210345937 A CN 202210345937A CN 115263548 A CN115263548 A CN 115263548A
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China
Prior art keywords
fault
information
engine
fire
preset
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Granted
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CN202210345937.7A
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CN115263548B (en
Inventor
张喜岗
彭煌华
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Great Wall Motor Co Ltd
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Great Wall Motor Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • F02B77/083—Safety, indicating, or supervising devices relating to maintenance, e.g. diagnostic device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • F02B77/082—Safety, indicating, or supervising devices relating to valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
    • F02B77/086—Sensor arrangements in the exhaust, e.g. for temperature, misfire, air/fuel ratio, oxygen sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • F02B77/089—Safety, indicating, or supervising devices relating to engine temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P11/00—Safety means for electric spark ignition, not otherwise provided for
    • F02P11/06—Indicating unsafe conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The embodiment of the invention provides an engine fire detection method, an engine fire detection device, a vehicle and a storage medium, wherein the method comprises the following steps: when the engine is detected to have the fire fault, the engine state information is acquired, whether the engine is really on fire is judged according to the engine state information, if the engine is really on fire, the reason of the systematic fault is judged according to a first preset parameter associated with the systematic fault, and/or the reason of the thermal environment fault in the cylinder is judged according to a second preset parameter associated with the thermal environment fault in the cylinder, and/or the reason of the gas circuit fault is judged according to a third preset parameter associated with the gas circuit fault, and/or the reason of the gas circuit fault is judged according to a fourth preset parameter associated with the gas circuit fault, and/or the reason of the oil circuit fault is judged according to a fifth preset parameter associated with the oil circuit fault. Therefore, after the specific cause of the engine fire is clearly known, the system can provide greater help for the use of the whole vehicle, after sale and the like.

Description

Engine fire detection method and device, vehicle and storage medium
Technical Field
The invention relates to the technical field of engine fault detection, in particular to an engine fire detection method, an engine fire detection device, a vehicle and a computer readable storage medium.
Background
When a vehicle engine is in operation, the phenomenon that the mixture in one or more cylinders of the engine is not sufficiently combusted or cannot be combusted due to an engine ignition system, an oil supply system, an air path system and the like is called engine misfire. The engine misfire is characterized in that the engine does not work or does not work enough, and the engine shake, the power deficiency and the automobile acceleration weakness are accompanied. When the vehicle is in fire, the damage to the vehicle and the environment is large, the operation of the engine is unstable, the power performance is reduced, the fuel economy is deteriorated, and meanwhile, the discharged waste gas is in an substandard state, so that the environmental pollution is aggravated.
The reasons for the engine fire are complex, the number of related parts or systems is large, if the direction of the reasons for the engine fire can be known, great help can be provided for the research and development, the use, the after sale and the like of the whole vehicle, and the satisfaction degree of the driving use of customers can be improved, so that the technical problem to be solved is how to directionally report the reasons for the engine fire.
Disclosure of Invention
In view of the above, embodiments of the present invention are proposed in order to provide an engine misfire detection method, an engine misfire detection apparatus, a vehicle, and a computer readable storage medium that overcome or at least partially solve the above-mentioned problems.
In order to solve the above problem, an embodiment of the present invention discloses an engine misfire detection method, including:
when the engine is detected to have a fire fault, acquiring the state information of the engine, and judging whether the engine is really on fire according to the state information of the engine;
if the fire is a true fire, acquiring a first preset parameter associated with a systematic fault, and/or a second preset parameter associated with an in-cylinder thermal environment fault, and/or a third preset parameter associated with a gas circuit fault, and/or a fourth preset parameter associated with a fire circuit fault, and/or a fifth preset parameter associated with an oil circuit fault;
and judging the reason of the systematic fault according to the first preset parameter, and/or judging the reason of the thermal environment fault in the cylinder according to the second preset parameter, and/or judging the reason of the gas circuit fault according to the third preset parameter, and/or judging the reason of the fire circuit fault according to the fourth preset parameter, and/or judging the reason of the oil circuit fault according to the fifth preset parameter.
Optionally, the first preset parameter associated with the systematic fault includes: at least one of fuel self-learning value information, air-fuel ratio information and rotating speed fluctuation information of the engine;
the judging the reason of the systematic fault according to the first preset parameter includes:
if the fuel self-learning value information is larger than a preset fuel self-learning threshold value, determining that the systematic fault is abnormal fuel injection; and/or the presence of a gas in the gas,
if the air-fuel ratio information is larger than a preset air-fuel ratio threshold value, determining that the systematic fault is abnormal air-fuel ratio; and/or the presence of a gas in the gas,
and if the rotating speed fluctuation information is larger than a preset rotating speed fluctuation threshold value, determining that the systematic fault is abnormal fluctuation of the rotating speed.
Optionally, the second preset parameter associated with the in-cylinder thermal environment fault includes: at least one of engine oil temperature information, water temperature information, exhaust temperature information and earthquake explosion signal information of the engine;
the judging the reason of the in-cylinder thermal environment fault according to the second preset parameter comprises the following steps:
if the engine oil temperature information is larger than a preset engine oil temperature threshold value, determining that the in-cylinder thermal environment fault is abnormal engine oil temperature; and/or the presence of a gas in the gas,
if the water temperature information is larger than a preset water temperature threshold value, determining that the in-cylinder thermal environment fault is abnormal water temperature of a cylinder cover; and/or the presence of a gas in the atmosphere,
if the exhaust temperature information is larger than a preset exhaust temperature threshold value, determining that the in-cylinder thermal environment fault is abnormal exhaust temperature; and/or the presence of a gas in the atmosphere,
and if the detonation signal information is greater than a preset detonation signal threshold value, determining that the in-cylinder thermal environment fault is a detonation signal abnormity.
Optionally, the third preset parameter associated with the gas circuit fault includes: at least one of deviation value information of an intake and exhaust VVT actual angle and a target angle of the engine, carbon tank load information and air leakage information;
the judging the reason of the gas circuit fault according to the third preset parameter includes:
if the deviation value information of the actual angle and the target angle of the intake and exhaust VVT is greater than a preset deviation threshold value, determining that the gas circuit fault is abnormal in VVT control; and/or the presence of a gas in the gas,
if the carbon tank load information is larger than a preset carbon tank load threshold value, determining that the gas circuit fault is a carbon tank control abnormity; and/or the presence of a gas in the gas,
and if the air leakage information is larger than a preset air leakage threshold value, determining that the air path fault is abnormal in air leakage.
Optionally, the fourth preset parameter associated with the fire fault includes: at least one of ignition angle information, ignition angle fluctuation information, ignition energy information and ignition ring information of the engine;
the judging the reason of the fire path fault according to the fourth preset parameter includes:
if the ignition angle information is smaller than a preset ignition angle threshold value, or the ignition angle fluctuation is larger than a preset ignition angle fluctuation threshold value, determining that the fire path fault is abnormal in ignition angle; and/or the presence of a gas in the atmosphere,
if the ignition energy information is larger than a first preset ignition angle and the energy is smaller than a second preset ignition angle, determining that the fire path fault is abnormal in ignition energy; and/or the presence of a gas in the gas,
and if the ignition ring information is failed, determining that the fire path fault is the ignition ring fault.
Optionally, the fifth preset parameter associated with the oil circuit fault includes: at least one of oil rail pressure information, oil injection time deviation information, oil injection pulse width information and oil injector information of the engine;
the judging the reason of the oil circuit fault according to the fifth preset parameter includes:
if the oil rail pressure information is larger than a preset oil rail pressure threshold value, determining that the oil circuit fault is rail pressure abnormity; and/or the presence of a gas in the gas,
if the oil injection time deviation information is larger than a preset oil injection time deviation threshold value, determining that the oil circuit fault is abnormal at the oil injection time; and/or the presence of a gas in the gas,
if the oil injection pulse width is larger than the preset oil injection pulse width threshold value, determining that the oil path fault is the abnormal oil injection pulse width; and/or the presence of a gas in the gas,
and if the fuel injector information is that the fault occurs, determining that the fault of the oil way is the fault of the fuel injector.
Optionally, when the engine is detected to have the misfire fault, acquiring engine state information, and before determining whether the engine state information is a true misfire according to the engine state information, the method further includes:
acquiring fire fault information, fire frequency information, ignition ring information and oil injector information of an engine;
if the fire fault information indicates that the fire fault occurs and/or the fire frequency information is greater than the preset fire frequency, reporting a related fault according to the ignition coil information, and determining the fire fault of the engine as the ignition coil fault;
if the fire fault information indicates that a fire fault occurs and/or the fire frequency information is greater than the preset fire frequency, reporting a relevant fault according to the information of the oil sprayer, and determining that the fire fault of the engine is the oil sprayer fault;
if the fire fault information indicates that the fire fault occurs, no relevant fault is reported according to the ignition ring information and the oil sprayer information, and/or if the fire frequency information is larger than the preset fire frequency, no relevant fault is reported according to the ignition ring information and the oil sprayer information, and whether the fire is true or not is judged according to the engine state information.
The embodiment of the invention discloses an engine fire detection device, which comprises:
the first judgment module is used for acquiring the state information of the engine when the engine is detected to have the fire fault, and judging whether the engine is really on fire according to the state information of the engine;
the first acquisition module is used for acquiring a first preset parameter associated with a systematic fault, and/or a second preset parameter associated with an in-cylinder thermal environment fault, and/or a third preset parameter associated with a gas circuit fault, and/or a fourth preset parameter associated with a fire circuit fault, and/or a fifth preset parameter associated with an oil circuit fault if the fire is a true fire;
the second judgment module is used for judging the reason of the systematic fault according to the first preset parameter, and/or judging the reason of the thermal environment fault in the cylinder according to the second preset parameter, and/or judging the reason of the gas circuit fault according to the third preset parameter, and/or judging the reason of the fire circuit fault according to the fourth preset parameter, and/or judging the reason of the oil circuit fault according to the fifth preset parameter.
Optionally, the first obtaining module includes:
the first preset parameter associated with the systematic fault comprises: at least one of fuel self-learning value information, air-fuel ratio information and rotating speed fluctuation information of the engine;
the second determination module includes:
the judging the reason of the systematic fault according to the first preset parameter includes:
if the fuel self-learning value information is larger than a preset fuel self-learning threshold value, determining that the systematic fault is abnormal fuel injection; and/or the presence of a gas in the gas,
if the air-fuel ratio information is larger than a preset air-fuel ratio threshold value, determining that the systematic fault is abnormal air-fuel ratio; and/or the presence of a gas in the atmosphere,
and if the rotating speed fluctuation information is larger than a preset rotating speed fluctuation threshold value, determining that the systematic fault is abnormal fluctuation of the rotating speed.
Optionally, the first obtaining module includes:
the second preset parameter associated with the in-cylinder thermal environment fault comprises: at least one of engine oil temperature information, water temperature information, exhaust temperature information and detonation signal information of the engine;
the second judging module includes:
the judging the reason of the in-cylinder thermal environment fault according to the second preset parameter comprises the following steps:
if the engine oil temperature information is larger than a preset engine oil temperature threshold value, determining that the in-cylinder thermal environment fault is abnormal engine oil temperature; and/or the presence of a gas in the gas,
if the water temperature information is larger than a preset water temperature threshold value, determining that the in-cylinder thermal environment fault is abnormal water temperature of a cylinder cover; and/or the presence of a gas in the gas,
if the exhaust temperature information is larger than a preset exhaust temperature threshold value, determining that the in-cylinder thermal environment fault is abnormal exhaust temperature; and/or the presence of a gas in the gas,
and if the detonation signal information is greater than a preset detonation signal threshold value, determining that the in-cylinder thermal environment fault is a detonation signal abnormity.
Optionally, the first obtaining module includes:
the third preset parameter associated with the gas circuit fault comprises: at least one of deviation value information of an intake and exhaust VVT actual angle and a target angle of the engine, carbon tank load information and air leakage information;
the second judging module includes:
the judging the reason of the gas circuit fault according to the third preset parameter includes:
if the deviation value information of the actual angle and the target angle of the intake and exhaust VVT is greater than a preset deviation threshold value, determining that the gas circuit fault is abnormal in VVT control; and/or the presence of a gas in the gas,
if the carbon tank load information is larger than a preset carbon tank load threshold value, determining that the gas circuit fault is a carbon tank control abnormity; and/or the presence of a gas in the atmosphere,
and if the air leakage information is larger than a preset air leakage threshold value, determining that the air path fault is abnormal in air leakage.
Optionally, the first obtaining module includes:
the fourth preset parameter associated with the fire fault includes: at least one of ignition angle information, ignition angle fluctuation information, ignition energy information and ignition ring information of the engine;
the second judging module includes:
the judging the reason of the fire path fault according to the fourth preset parameter includes:
if the ignition angle information is smaller than a preset ignition angle threshold value, or the ignition angle fluctuation is larger than a preset ignition angle fluctuation threshold value, determining that the fire path fault is abnormal in ignition angle; and/or the presence of a gas in the gas,
if the ignition energy information is larger than a first preset ignition angle energy and smaller than a second preset ignition angle energy, determining that the fire path fault is abnormal in ignition energy; and/or the presence of a gas in the gas,
and if the ignition ring information is failed, determining that the fire path fault is the ignition ring fault.
Optionally, the first obtaining module includes:
the fifth preset parameter associated with the oil circuit fault comprises: at least one of oil rail pressure information, oil injection time deviation information, oil injection pulse width information and oil injector information of the engine;
the second determination module includes:
the judging the reason of the oil circuit fault according to the fifth preset parameter includes:
if the oil rail pressure information is larger than a preset oil rail pressure threshold value, determining that the oil circuit fault is rail pressure abnormity; and/or the presence of a gas in the atmosphere,
if the oil injection time deviation information is larger than a preset oil injection time deviation threshold value, determining that the oil way fault is abnormal in oil injection time; and/or the presence of a gas in the atmosphere,
if the oil injection pulse width is larger than the preset oil injection pulse width threshold value, determining that the oil path fault is the abnormal oil injection pulse width; and/or the presence of a gas in the gas,
and if the fuel injector information is that the fault occurs, determining that the fault of the oil way is the fault of the fuel injector.
Optionally, the apparatus comprises:
the second acquisition module is used for acquiring fire fault information, fire frequency information, ignition ring information and oil sprayer information of the engine;
the first determining module is used for reporting related faults according to the ignition coil information if the fire fault information indicates that the fire fault occurs and/or the fire frequency information is greater than the preset fire frequency, and then determining that the fire fault of the engine is the ignition coil fault;
the second determining module is used for determining that the fire fault of the engine is the fault of the oil sprayer if the fire fault information indicates that the fire fault occurs and/or the fire frequency information is greater than the preset fire frequency and reports related faults according to the information of the oil sprayer;
and the third judging module is used for judging whether the fire is true or not according to the engine state information if the fire fault information indicates that the fire occurs and does not report related faults according to the ignition ring information and the oil sprayer information, and/or when the fire times information is greater than the preset fire times and does not report related faults according to the ignition ring information and the oil sprayer information.
The invention also discloses a vehicle comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the engine misfire detection method as described above when executing the computer program.
The invention also discloses a computer readable storage medium on which a computer program is stored, which computer program, when executed by a processor, implements the steps of the engine misfire detection method as described above.
The embodiment of the invention has the following advantages:
in the embodiment of the invention, when the engine is detected to have the fire fault, the state information of the engine is acquired, and whether the engine is really on fire is judged according to the state information of the engine; if the fire is a true fire, acquiring a first preset parameter associated with a systematic fault, and/or a second preset parameter associated with an in-cylinder thermal environment fault, and/or a third preset parameter associated with a gas circuit fault, and/or a fourth preset parameter associated with a fire circuit fault, and/or a fifth preset parameter associated with an oil circuit fault; and judging the reason of the systematic fault according to a first preset parameter, and/or judging the reason of the thermal environment fault in the cylinder according to a second preset parameter, and/or judging the reason of the gas circuit fault according to a third preset parameter, and/or judging the reason of the fire circuit fault according to a fourth preset parameter, and/or judging the reason of the oil circuit fault according to a fifth preset parameter. Therefore, compared with the prior art, the specific reason of the engine misfire can be known more clearly, and after the specific reason of the engine misfire is known, the research and development, the use, the after-sale and the like of the whole vehicle can be provided with greater help.
Drawings
FIG. 1 is a flowchart illustrating steps in a method for engine misfire detection in accordance with an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for determining a cause of a misfire failure in an engine according to an embodiment of the present invention;
FIG. 3 is a flowchart of a method for determining whether an engine misfire fault is a true misfire provided by an embodiment of the present invention;
FIG. 4 is a flowchart of a method for determining a cause of a systematic fault in the event of a true engine misfire according to an embodiment of the present invention;
FIG. 5 is a flowchart of a method for determining a cause of a cylinder thermal environment fault in the event of a true engine misfire according to an embodiment of the present disclosure;
FIG. 6 is a flowchart of a method for determining a cause of a gas circuit fault when an engine is in true misfire according to an embodiment of the present invention;
FIG. 7 is a flowchart of a method for determining a cause of a fire path fault in the event of a true engine misfire according to an embodiment of the present disclosure;
FIG. 8 is a flowchart of a method for determining a cause of an abnormal signal of a speed sensor in the case of a false engine misfire according to an embodiment of the present invention;
fig. 9 is a block diagram of a misfire detection apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides an engine fire detection method for solving the technical problems, which has the core concept that when the engine has the fire fault, preset parameters are obtained, and the fault reason corresponding to the preset parameters is judged according to the preset parameters.
Referring to fig. 1, a flowchart illustrating steps of a method for engine misfire detection according to an embodiment of the present invention may include the following steps:
step 101, when detecting that the engine has a fire fault, acquiring engine state information, and judging whether the engine is a true fire according to the engine state information;
as an example, misfire failure information, misfire frequency information, ignition ring information, and injector information of the engine are acquired before step 101 is executed, and the misfire failure information may be detected and acquired by an ECU (Electronic Control Unit) or other sensors. And judging the cause of the fire fault of the engine according to the acquired fire fault information, the fire frequency information, the ignition ring information and the oil injector information.
Referring to fig. 2, a flowchart illustrating a method for determining a cause of a misfire failure in an engine according to an embodiment of the present invention may specifically include the following steps:
obtaining engine information, wherein the engine information may include: fire fault information, fire frequency information, ignition ring information and fuel injector information.
If the fire fault information is detected to be the fire fault, and no relevant fault is reported according to the information of the ignition ring and the information of the oil sprayer, the relevant fault can comprise the abnormal condition of the ignition ring and the abnormal condition of the oil sprayer, and whether the fire is really fired can be judged according to the state information of the engine.
If the fire fault information is detected to be the fire fault, the related fault is reported according to the information of the ignition ring and the information of the oil sprayer, if the related fault is reported according to the information of the ignition ring, the fire fault of the engine can be determined to be the abnormal condition of the ignition ring, and if the related fault is reported according to the information of the oil sprayer, the fire fault of the engine can be determined to be the abnormal condition of the oil sprayer.
If the detected fire frequency information is larger than the preset fire frequency threshold value and no relevant fault is reported according to the information of the ignition ring and the information of the oil injector, whether the fire is really fired or not can be judged according to the state information of the engine.
If the detected fire frequency information is larger than the preset fire frequency threshold value, a relevant fault is reported according to the information of the ignition ring and the information of the oil sprayer, if the relevant fault is reported according to the information of the ignition ring, the fault of the engine can be determined to be abnormal of the ignition ring, and if the relevant fault is reported according to the information of the oil sprayer, the fault of the engine can be determined to be abnormal of the oil sprayer.
Referring to fig. 3, a flowchart of a method for determining whether an engine misfire fault is a true misfire provided by the embodiment of the invention is shown, specifically as follows:
when the engine is detected to have the misfire fault, acquiring the state information of the engine, wherein the state information may include: the method comprises the following steps that the fire frequency counter information, the rotating speed fluctuation information, the air-fuel ratio information and the ignition angle fluctuation information of the engine can judge whether the engine really catches fire according to the state information of the engine, and the method specifically comprises the following steps: if the acquired fire frequency counter information is greater than a preset fire frequency threshold value and the fire frequency is increased, acquiring rotating speed fluctuation information, air-fuel ratio information and ignition angle fluctuation information, and if the rotating speed fluctuation information is not greater than the preset rotating speed fluctuation threshold value, the air-fuel ratio information is not greater than a first preset air-fuel ratio threshold value and is not less than a second preset air-fuel ratio threshold value, and the ignition angle fluctuation information is not greater than a preset ignition angle threshold value, determining that the engine fire fault is a false fire; if the rotating speed fluctuation information is larger than a preset rotating speed fluctuation threshold value, and/or the air-fuel ratio information is larger than a first preset air-fuel ratio threshold value or smaller than a second air-fuel ratio threshold value, and/or the ignition angle fluctuation information is larger than a preset ignition angle fluctuation threshold value, it can be determined that the engine fire fault is a true fire.
102, if the fire is a true fire, acquiring a first preset parameter associated with a systematic fault, and/or a second preset parameter associated with an in-cylinder thermal environment fault, and/or a third preset parameter associated with a gas path fault, and/or a fourth preset parameter associated with a fire path fault, and/or a fifth preset parameter associated with an oil path fault;
if the engine misfire fault is judged to be a true misfire according to the engine state information, acquiring a first preset parameter associated with the systematic fault, wherein the first preset parameter may include: and at least one of fuel self-learning value information, air-fuel ratio information and rotating speed fluctuation information of the engine. And/or acquiring a second preset parameter associated with the in-cylinder thermal environment fault, wherein the second preset parameter may include: at least one of engine oil temperature information, water temperature information, exhaust temperature information and earthquake explosion signal information of the engine. And/or acquiring a third preset parameter associated with the gas circuit fault, wherein the third preset parameter may include: and at least one of deviation value information of an actual intake and exhaust VVT angle and a target angle of the engine, carbon tank load information and air leakage information. And/or acquiring a fourth preset parameter associated with the fire circuit fault, wherein the fourth preset parameter may include: and at least one of ignition angle information, ignition angle fluctuation information, ignition energy information and ignition ring information of the engine. And/or acquiring a fifth preset parameter associated with the oil circuit fault, wherein the fifth preset parameter may include: at least one of oil rail pressure information, oil injection time deviation information, oil injection pulse width information and oil injector information of the engine.
103, judging the reason of the systematic fault according to the first preset parameter, and/or judging the reason of the thermal environment fault in the cylinder according to the second preset parameter, and/or judging the reason of the gas circuit fault according to the third preset parameter, and/or judging the reason of the fire circuit fault according to the fourth preset parameter, and/or judging the reason of the oil circuit fault according to the fifth preset parameter.
As an example, referring to fig. 4, a flowchart of a method for determining a cause of a systematic fault when an engine really misfires according to an embodiment of the present invention is shown, and the method specifically includes:
and after the fuel self-learning information is obtained, judging the reason of the systematic fault according to the fuel self-learning information. The method specifically comprises the following steps: if the acquired fuel self-learning information is larger than the preset fuel self-learning threshold value, the fact that the systematic fault in the engine misfire fault is excessive and rich fuel injection caused by abnormal fuel injection can be determined. At the moment, the corresponding reasons can be overhauled according to the abnormal oil injection, so that the problem of engine misfire caused by the abnormal oil injection is solved.
After the air-fuel ratio information of the engine is acquired, the cause of the systematic fault is judged according to the acquired air-fuel ratio information. The method specifically comprises the following steps: if the acquired air-fuel ratio information is larger than the preset air-fuel ratio threshold value, it can be determined that the systematic fault in the engine misfire fault is an air-fuel ratio abnormality. At the moment, corresponding reasons can be overhauled according to the air-fuel ratio abnormity, so that the problem of engine misfire caused by the air-fuel ratio abnormity is solved.
And after the rotating speed fluctuation information of the engine is acquired, judging the reason of the systematic fault according to the acquired rotating speed fluctuation information. Specifically, if the acquired rotating speed fluctuation information is larger than a preset rotating speed fluctuation threshold value, the systematic fault in the engine fire fault can be determined to be abnormal rotating speed fluctuation. At the moment, corresponding reasons can be overhauled according to abnormal fluctuation of the rotating speed, so that the problem of engine fire fault caused by abnormal fluctuation of the rotating speed is solved.
Referring to fig. 5, a flowchart of a method for determining a cause of a cylinder thermal environment fault when an engine is in a true misfire according to an embodiment of the present invention is shown, specifically as follows:
and after the engine oil temperature information of the engine is acquired, judging the cause of the thermal environment fault in the cylinder according to the acquired engine information. The method specifically comprises the following steps: if the acquired engine oil temperature information is larger than the preset engine oil temperature threshold value, it can be determined that the in-cylinder thermal environment fault in the engine misfire fault is abnormal in engine oil temperature. At the moment, the corresponding reasons can be overhauled according to the abnormal engine oil temperature, so that the problem of engine fire fault caused by the abnormal engine oil temperature is solved.
And after the water temperature information of the engine is acquired, judging the cause of the thermal environment fault in the cylinder according to the acquired water temperature information of the engine. The method specifically comprises the following steps: if the acquired water temperature information is larger than the preset water temperature threshold value, the fact that the in-cylinder thermal environment fault is abnormal in cylinder cover water temperature in the engine fire fault can be determined. Corresponding reasons can be overhauled according to the abnormal water temperature of the cylinder cover, and therefore the problem that the engine is in fire due to the abnormal water temperature of the cylinder cover is solved.
And after the exhaust temperature information of the engine is acquired, judging the reason of the hot environmental fault according to the acquired exhaust temperature information of the engine. The method specifically comprises the following steps: if the acquired exhaust temperature information is larger than the preset exhaust temperature threshold value, the in-cylinder thermal environment fault in the engine fire fault can be determined to be abnormal exhaust temperature. At the moment, the corresponding reasons can be overhauled according to the abnormal exhaust temperature, so that the problem of engine fire fault caused by abnormal exhaust temperature is solved.
And after acquiring the detonation signal information of the engine, judging the reason of the thermal environment fault in the cylinder according to the acquired detonation signal information of the engine. The method comprises the following specific steps: if the acquired detonation signal information is larger than the preset detonation signal threshold value, the in-cylinder thermal environment fault in the engine misfire fault can be determined to be abnormal in the detonation signal. Corresponding reasons can be overhauled according to the earthquake and explosion signal abnormity, and therefore the problem of engine fire accident caused by earthquake and explosion information abnormity is solved.
As an example, referring to fig. 6, a flowchart of a method for determining a cause of a gas circuit fault when an engine is truly misfiring according to an embodiment of the present invention is shown, specifically as follows:
and after deviation value information of the intake and exhaust VVT actual angle and the target angle of the engine is acquired, judging the reason of the gas circuit fault according to the acquired deviation value information of the intake and exhaust VVT actual angle and the target angle of the engine. The method specifically comprises the following steps: if the obtained deviation value information of the actual angle and the target angle of the intake and exhaust VVT is larger than a preset deviation threshold value, the fact that the gas circuit fault in the engine fire fault is abnormal VVT control can be determined. At the moment, the corresponding reason can be overhauled according to the VVT control abnormity, so that the problem of engine misfire caused by the VVT control abnormity is solved.
And after the carbon tank load information of the engine is acquired, judging the reason of the gas circuit fault according to the acquired carbon tank load information of the engine. The method comprises the following specific steps: and if the acquired carbon tank load information is greater than the preset carbon tank load threshold value, determining that the gas circuit fault in the engine fire fault is abnormal in carbon tank control. At the moment, the corresponding reasons can be overhauled according to the abnormal control of the carbon tank, so that the problem of engine fire fault caused by the abnormal control of the carbon tank is solved.
And after air leakage information of the engine is obtained, judging the reason of the air circuit fault according to the obtained air leakage information. The method specifically comprises the following steps: if the acquired air leakage information is larger than the preset air leakage threshold value, it can be determined that the air path fault is abnormal in the engine fire fault. At the moment, corresponding reasons can be overhauled according to the abnormal air leakage amount, so that the problem of engine fire fault caused by the abnormal air leakage amount is solved.
Referring to fig. 7, a flowchart of a method for determining a cause of a fire path fault when an engine really misfires according to an embodiment of the present invention is shown, and the method specifically includes:
and acquiring ignition angle information or ignition angle fluctuation information of the engine, and judging the cause of the fire path fault according to the acquired ignition angle information or ignition angle fluctuation information. The method specifically comprises the following steps: if the acquired ignition angle information is smaller than the preset ignition angle threshold value or the ignition angle fluctuation information is larger than the preset ignition angle fluctuation threshold value, it can be determined that the fire path fault in the engine fire fault is abnormal in ignition angle. At the moment, corresponding reasons can be overhauled according to the abnormal ignition angle, so that the problem of engine misfire caused by abnormal ignition angle is solved.
And acquiring ignition energy information of the engine, and judging the cause of the fire path fault according to the acquired ignition energy information. The method specifically comprises the following steps: if the acquired ignition energy information is larger than the first preset ignition angle energy and smaller than the second preset ignition angle energy, the fact that the fire path fault in the engine fire fault is abnormal in ignition energy can be determined. At the moment, corresponding reasons can be overhauled according to the abnormal ignition energy, so that the problem of engine misfire caused by abnormal ignition energy is solved.
And acquiring ignition ring information of the engine, and judging the cause of the fire path fault according to the acquired ignition ring information. The method specifically comprises the following steps: if the acquired ignition ring information indicates that the fault occurs, the fire path fault in the engine fire fault can be determined to be the ignition ring fault. At the moment, the corresponding reasons can be overhauled according to the ignition ring fault, so that the problem of engine fire fault caused by the ignition ring fault is solved.
As an example, if the fire is a false fire, acquiring a sixth preset parameter causing the signal abnormality of the rotation speed sensor, and judging the reason causing the signal abnormality of the rotation speed sensor according to the sixth preset parameter;
when the false fire happens to the vehicle, the reason causing the false fire of the vehicle is caused by the abnormal signal of the rotating speed sensor, therefore, the reason causing the false fire of the vehicle can be determined by determining the reason causing the abnormal signal of the rotating speed sensor. If the engine misfire fault is judged to be the false misfire according to the engine state information, acquiring a sixth preset parameter causing the abnormal signal of the rotation speed sensor, wherein the sixth preset parameter may include: the information processing method comprises at least one of misfire self-learning completion information, catalyst heating information, idle speed information, misfire cylinder number information, misfire tooth deviation self-learning information, torque information, rotating speed information, fuel rail pressure information, fuel injection quantity information, deviation information of intake and exhaust VVT (Variable Valve Timing) actual angle and target angle, and ignition angle information of the engine. And judging the reason of the abnormal signal of the rotating speed sensor according to the acquired sixth preset parameter information.
Referring to fig. 8, a flowchart of a method for determining a cause of an abnormal signal of a rotation speed sensor when an engine is in a false misfire according to an embodiment of the present invention is shown, specifically as follows:
the method comprises the steps of obtaining misfire self-learning completion information, catalyst heating information and idle speed information of the engine, and if the misfire self-learning information does not reach a preset misfire self-learning completion state, the catalyst heating information is not larger than a preset catalyst heating threshold value and the idle speed information does not reach a preset idle speed state, obtaining misfire cylinder number information of the engine. The preset misfire self-learning completion state may include a preset misfire self-learning completion threshold, and the preset idle speed state may include a preset idle speed threshold.
If the acquired misfire cylinder number information is equal to the preset misfire cylinder number threshold value, if: and if the fire catching tooth deviation self-learning information is larger than the preset fire catching tooth deviation self-learning threshold value, determining that the reason causing the abnormal signal of the rotating speed sensor in the false fire catching of the engine fire fault is the abnormal physical tooth deviation value. At the moment, the self-learning process of the deflection of the misfiring teeth can be maintained according to the abnormality of the deflection value of the physical teeth, so that the problem of the engine misfiring fault caused by the abnormality of the deflection value of the physical teeth is solved.
If the misfire deviation self-learning information is not larger than the preset misfire tooth deviation self-learning threshold value, torque information and rotating speed information of the engine are obtained, and if the torque information is smaller than the preset torque threshold value and the rotating speed information is larger than the preset threshold value, the fact that the rotating speed sensor signal is abnormal in false misfire due to the misfire fault of the engine can be determined to be the influence of a small-load working condition system. At the moment, the corresponding reasons for overhauling are influenced according to the small-load working condition, so that the problem of engine misfire fault caused by the influence of the small-load working condition is solved.
If the misfire self-learning information reaches a preset misfire self-learning completion state, the catalyst heating information is larger than a preset catalyst heating threshold value, and the idle speed information reaches a preset idle speed state, at least one of oil rail pressure information, fuel injection quantity information, deviation information of an intake and exhaust VVT actual angle and a target angle and ignition angle information of the engine are acquired, when the acquired oil rail pressure information is larger than the preset oil rail pressure threshold value, the fact that the rotating speed sensor signal is abnormal in the engine misfire fault can be determined to be rail pressure abnormity, the corresponding reason can be overhauled according to the rail pressure abnormity, and therefore the engine misfire fault caused by the rail pressure abnormity is solved.
If the acquired fuel injection amount information is larger than the preset fuel injection threshold value, the fact that the reason of abnormal signals of the rotating speed sensor in the engine fire fault is that the heating combustion of the catalyst is unstable due to the abnormal multi-injection mode can be determined. Corresponding reasons can be overhauled according to the multi-spraying mode abnormity, and therefore the problem of engine fire accident caused by the multi-spraying mode abnormity is solved.
If the obtained deviation information of the actual angle and the target angle of the intake and exhaust VVT is larger than the preset deviation threshold value, the fact that the signal of the rotating speed sensor is abnormal in the engine misfire fault can be determined to be that heating combustion of a catalyst is unstable due to VVT abnormality. At the moment, the corresponding reasons can be overhauled according to the VVT abnormity, so that the problem of engine misfire caused by VVT abnormity is solved.
If the acquired ignition angle information is smaller than the preset ignition angle threshold value, the fact that the reason causing the abnormal signal of the rotating speed sensor in the engine misfire fault is that the catalytic converter heating combustion is unstable due to the abnormal thrust angle can be determined. At the moment, corresponding reasons can be overhauled according to the abnormal thrust angle, so that the problem of engine fire fault caused by the abnormal thrust angle is solved.
If the acquired fuel rail pressure information is not greater than a preset fuel rail pressure threshold value, the fuel injection quantity information is not greater than a preset fuel injection quantity threshold value, the deviation information of the intake and exhaust VVT actual angle and the target angle is not greater than a preset deviation value, and the ignition angle information is not less than a preset ignition angle threshold value, it can be determined that the sensor fault in the engine misfire fault is abnormal in the heating stage of the catalyst. At the moment, the corresponding reasons can be overhauled according to the heating abnormality of the catalyst, so that the problem of engine fire fault caused by the abnormality of the heating stage of the catalyst is solved.
In the above embodiment of the invention, when the engine is detected to have the fire fault, the engine state information is acquired, and whether the engine is really on fire is judged according to the engine state information; if the fire is a true fire, acquiring a first preset parameter associated with a systematic fault, and/or a second preset parameter associated with an in-cylinder thermal environment fault, and/or a third preset parameter associated with a gas circuit fault, and/or a fourth preset parameter associated with a fire circuit fault, and/or a fifth preset parameter associated with an oil circuit fault; judging the reason of the systematic fault according to the first preset parameter, and/or judging the reason of the thermal environment fault in the cylinder according to the second preset parameter, and/or judging the reason of the gas circuit fault according to the third preset parameter, and/or judging the reason of the fire circuit fault according to the fourth preset parameter, and/or judging the reason of the oil circuit fault according to the fifth preset parameter. Therefore, compared with the prior art, the specific reason of the engine misfire can be known more clearly, and after the specific reason of the engine misfire is known, the research and development, the use, the after-sale and the like of the whole vehicle can be provided with greater help.
Referring to fig. 9, a block diagram of a misfire detection apparatus provided in an embodiment of the present invention is shown, which specifically includes the following modules:
the first judging module 901 is used for acquiring the engine state information when the engine is detected to have the fire fault, and judging whether the engine is really on fire according to the engine state information;
a first obtaining module 902, configured to obtain, if the fire is a true fire, a first preset parameter associated with a systematic fault, and/or a second preset parameter associated with an in-cylinder thermal environment fault, and/or a third preset parameter associated with a gas circuit fault, and/or a fourth preset parameter associated with a fire circuit fault, and/or a fifth preset parameter associated with a fuel circuit fault;
a second determining module 903, configured to determine a cause of the systematic fault according to the first preset parameter, and/or determine a cause of the in-cylinder thermal environment fault according to the second preset parameter, and/or determine a cause of the gas circuit fault according to the third preset parameter, and/or determine a cause of the fire circuit fault according to the fourth preset parameter, and/or determine a cause of the oil circuit fault according to the fifth preset parameter.
In an embodiment of the present invention, the first obtaining module 902 includes:
the first preset parameter associated with the systematic fault comprises: at least one of fuel self-learning value information, air-fuel ratio information and rotating speed fluctuation information of the engine;
the second determining module 903 includes:
the judging the reason of the systematic fault according to the first preset parameter includes:
if the fuel self-learning value information is larger than a preset fuel self-learning threshold value, determining that the systematic fault is abnormal fuel injection; and/or the presence of a gas in the gas,
if the air-fuel ratio information is larger than a preset air-fuel ratio threshold, determining that the systematic fault is abnormal air-fuel ratio; and/or the presence of a gas in the gas,
and if the rotating speed fluctuation information is larger than a preset rotating speed fluctuation threshold value, determining that the systematic fault is abnormal fluctuation of the rotating speed.
In an embodiment of the present invention, the first obtaining module 902 includes:
the second preset parameter associated with the in-cylinder thermal environment fault comprises: at least one of engine oil temperature information, water temperature information, exhaust temperature information and earthquake explosion signal information of the engine;
the second determining module 903 includes:
the judging the reason of the in-cylinder thermal environment fault according to the second preset parameter comprises the following steps:
if the engine oil temperature information is larger than a preset engine oil temperature threshold value, determining that the in-cylinder thermal environment fault is abnormal engine oil temperature; and/or the presence of a gas in the gas,
if the water temperature information is larger than a preset water temperature threshold value, determining that the in-cylinder thermal environment fault is abnormal water temperature of a cylinder cover; and/or the presence of a gas in the gas,
if the exhaust temperature information is larger than a preset exhaust temperature threshold value, determining that the in-cylinder thermal environment fault is abnormal exhaust temperature; and/or the presence of a gas in the gas,
and if the detonation signal information is greater than a preset detonation signal threshold value, determining that the in-cylinder thermal environment fault is a detonation signal abnormity.
In an embodiment of the present invention, the first obtaining module 902 includes:
the third preset parameter associated with the gas circuit fault comprises: at least one of deviation value information of an intake and exhaust VVT actual angle and a target angle of the engine, carbon tank load information and air leakage information;
the second determining module 903 includes:
the judging the reason of the gas circuit fault according to the third preset parameter includes:
if the deviation value information of the actual angle and the target angle of the intake and exhaust VVT is greater than a preset deviation threshold value, determining that the gas circuit fault is abnormal in VVT control; and/or the presence of a gas in the gas,
if the carbon tank load information is larger than a preset carbon tank load threshold value, determining that the gas circuit fault is a carbon tank control abnormity; and/or the presence of a gas in the atmosphere,
and if the air leakage information is larger than a preset air leakage threshold value, determining that the air path fault is abnormal in air leakage.
In an embodiment of the present invention, the first obtaining module 902 includes:
the fourth preset parameter associated with the fire fault includes: at least one of ignition angle information, ignition angle fluctuation information, ignition energy information and ignition ring information of the engine;
the second determining module 903 includes:
the judging the reason of the fire path fault according to the fourth preset parameter includes:
if the ignition angle information is smaller than a preset ignition angle threshold value or the ignition angle fluctuation is larger than a preset ignition angle fluctuation threshold value, determining that the fire path fault is abnormal in ignition angle; and/or the presence of a gas in the atmosphere,
if the ignition energy information is larger than a first preset ignition angle energy and smaller than a second preset ignition angle energy, determining that the fire path fault is abnormal in ignition energy; and/or the presence of a gas in the gas,
and if the ignition ring information is failed, determining that the fire path fault is the ignition ring fault.
In an embodiment of the present invention, the first obtaining module 902 includes:
the fifth preset parameter associated with the oil circuit fault comprises: at least one of oil rail pressure information, oil injection time deviation information, oil injection pulse width information and oil injector information of the engine;
the second determining module 903 includes:
the judging the reason of the oil circuit fault according to the fifth preset parameter includes:
if the oil rail pressure information is larger than a preset oil rail pressure threshold value, determining that the oil circuit fault is rail pressure abnormity; and/or the presence of a gas in the atmosphere,
if the oil injection time deviation information is larger than a preset oil injection time deviation threshold value, determining that the oil way fault is abnormal in oil injection time; and/or the presence of a gas in the gas,
if the oil injection pulse width is larger than the preset oil injection pulse width threshold value, determining that the oil path fault is the abnormal oil injection pulse width; and/or the presence of a gas in the gas,
and if the fuel injector information is that the fault occurs, determining that the fault of the oil way is the fault of the fuel injector.
In one embodiment of the invention, the apparatus comprises:
the second acquisition module is used for acquiring fire fault information, fire frequency information, ignition ring information and oil sprayer information of the engine;
the first determining module is used for determining that the misfire fault of the engine is an ignition coil fault if the misfire fault information indicates that the misfire fault occurs and/or the misfire frequency information is greater than a preset misfire frequency and a related fault is reported according to the ignition coil information;
the second determining module is used for determining that the fire fault of the engine is the fault of the oil sprayer if the fire fault information indicates that the fire fault occurs and/or the fire frequency information is greater than the preset fire frequency and reports related faults according to the information of the oil sprayer;
and the third judging module is used for judging whether the fire is true or not according to the engine state information if the fire fault information indicates that the fire is failed and no related fault is reported according to the ignition ring information and the oil sprayer information, and/or when the fire frequency information is greater than the preset fire frequency and no related fault is reported according to the ignition ring information and the oil sprayer information.
Optionally, the apparatus comprises:
and the fourth judging module is used for acquiring a first preset parameter causing the abnormal signal of the rotating speed sensor if the fire is false, and judging the reason causing the abnormal signal of the rotating speed sensor according to the first preset parameter.
Optionally, the fourth determining module includes:
the sixth preset parameter causing the signal abnormality of the rotation speed sensor includes: at least one of misfire tooth deviation self-learning information, torque information, rotating speed information, fuel rail pressure information, fuel injection quantity information, deviation information of intake and exhaust VVT actual angles and target angles and ignition angle information of the engine;
the judging the reason for causing the abnormal signal of the rotating speed sensor according to the sixth preset parameter comprises the following steps:
if the self-learning of the deviation of the fire teeth is larger than the preset self-learning threshold of the deviation of the fire teeth, determining that the reason causing the abnormal signals of the rotating speed sensor is the abnormal deviation value of the physical teeth; and/or the presence of a gas in the gas,
if the torque information is smaller than a preset torque threshold value and the rotating speed information is larger than a preset rotating speed threshold value, determining that the reason causing the abnormal signal of the rotating speed sensor is the influence of a small-load working condition shafting; and/or the presence of a gas in the gas,
if the oil rail pressure information is larger than a preset oil rail pressure threshold value, determining that the reason causing the abnormal signal of the rotating speed sensor is rail pressure abnormity; and/or the presence of a gas in the gas,
if the fuel injection quantity information is larger than a preset fuel injection quantity threshold value, determining that the reason causing the abnormal signal of the rotating speed sensor is the abnormal multi-injection mode; and/or the presence of a gas in the gas,
if the deviation information of the intake and exhaust VVT actual angle and the target angle is larger than a preset deviation value, determining that the sensor fault is abnormal VVT; and/or the presence of a gas in the gas,
if the ignition angle information is smaller than a preset ignition angle threshold value, determining that the sensor fault is a thrust angle abnormality; and/or the presence of a gas in the gas,
and if the oil rail pressure information is not greater than the preset oil rail pressure threshold, the fuel injection quantity information is not greater than the preset fuel injection quantity threshold, the deviation information of the actual angle of the intake and exhaust VVT and the target angle is not greater than the preset deviation value, and the ignition angle information is not less than the preset ignition angle threshold, determining that the sensor fault is abnormal in the heating stage of the catalyst.
In the embodiment of the invention, when the engine is detected to have the fire fault, the state information of the engine is acquired, and whether the engine is really on fire is judged according to the state information of the engine; if the fire is a true fire, acquiring a first preset parameter associated with a systematic fault, and/or a second preset parameter associated with an in-cylinder thermal environment fault, and/or a third preset parameter associated with a gas circuit fault, and/or a fourth preset parameter associated with a fire circuit fault, and/or a fifth preset parameter associated with an oil circuit fault; judging the reason of the systematic fault according to the first preset parameter, and/or judging the reason of the thermal environment fault in the cylinder according to the second preset parameter, and/or judging the reason of the gas circuit fault according to the third preset parameter, and/or judging the reason of the fire circuit fault according to the fourth preset parameter, and/or judging the reason of the oil circuit fault according to the fifth preset parameter. Therefore, compared with the prior art, the specific reason of the engine misfire can be known more clearly, and after the specific reason of the engine misfire is known, the research and development, the use, the after-sale and the like of the whole vehicle can be provided with greater help.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
An embodiment of the present invention further provides a vehicle, including:
the engine misfire detection method comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, wherein when the computer program is executed by the processor, each process of the engine misfire detection method embodiment is realized, the same technical effect can be achieved, and in order to avoid repetition, the description is omitted here.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the above-mentioned engine misfire detection method embodiment, and can achieve the same technical effect, and in order to avoid repetition, the details are not repeated here.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or terminal apparatus that comprises the element.
The engine misfire detection method and the engine misfire detection device provided by the invention are described in detail, specific examples are applied in the description to explain the principle and the implementation mode of the invention, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. An engine misfire detection method, characterized in that the method comprises:
when the engine is detected to have a fire fault, acquiring the state information of the engine, and judging whether the engine is really on fire according to the state information of the engine;
if the fire is a true fire, acquiring a first preset parameter associated with a systematic fault, and/or a second preset parameter associated with an in-cylinder thermal environment fault, and/or a third preset parameter associated with a gas circuit fault, and/or a fourth preset parameter associated with a fire circuit fault, and/or a fifth preset parameter associated with an oil circuit fault;
and judging the reason of the systematic fault according to the first preset parameter, and/or judging the reason of the thermal environment fault in the cylinder according to the second preset parameter, and/or judging the reason of the gas circuit fault according to the third preset parameter, and/or judging the reason of the fire circuit fault according to the fourth preset parameter, and/or judging the reason of the oil circuit fault according to the fifth preset parameter.
2. The method of claim 1, wherein the first preset parameter associated with the systematic fault comprises: at least one of fuel self-learning value information, air-fuel ratio information and rotating speed fluctuation information of the engine;
the judging the reason of the systematic fault according to the first preset parameter includes:
if the fuel self-learning value information is larger than a preset fuel self-learning threshold value, determining that the systematic fault is abnormal fuel injection; and/or the presence of a gas in the gas,
if the air-fuel ratio information is larger than a preset air-fuel ratio threshold value, determining that the systematic fault is abnormal air-fuel ratio; and/or the presence of a gas in the gas,
and if the rotating speed fluctuation information is larger than a preset rotating speed fluctuation threshold value, determining that the systematic fault is abnormal fluctuation of the rotating speed.
3. The method of claim 1, wherein the second preset parameter associated with the in-cylinder thermal environment fault comprises: at least one of engine oil temperature information, water temperature information, exhaust temperature information and earthquake explosion signal information of the engine;
the judging the reason of the in-cylinder thermal environment fault according to the second preset parameter comprises the following steps:
if the engine oil temperature information is larger than a preset engine oil temperature threshold value, determining that the in-cylinder thermal environment fault is abnormal engine oil temperature; and/or the presence of a gas in the gas,
if the water temperature information is larger than a preset water temperature threshold value, determining that the in-cylinder thermal environment fault is abnormal water temperature of a cylinder cover; and/or the presence of a gas in the gas,
if the exhaust temperature information is larger than a preset exhaust temperature threshold value, determining that the in-cylinder thermal environment fault is abnormal exhaust temperature; and/or the presence of a gas in the gas,
and if the detonation signal information is greater than a preset detonation signal threshold value, determining that the in-cylinder thermal environment fault is a detonation signal abnormity.
4. The method of claim 1, wherein the third preset parameter associated with the gas circuit fault comprises: at least one of deviation value information of an intake and exhaust VVT actual angle and a target angle of the engine, carbon tank load information and air leakage information;
the judging the reason of the gas circuit fault according to the third preset parameter includes:
if the deviation value information of the actual angle and the target angle of the intake and exhaust VVT is greater than a preset deviation threshold value, determining that the gas circuit fault is abnormal in VVT control; and/or the presence of a gas in the gas,
if the carbon tank load information is larger than a preset carbon tank load threshold value, determining that the gas circuit fault is a carbon tank control abnormity; and/or the presence of a gas in the gas,
and if the air leakage information is larger than a preset air leakage threshold value, determining that the air path fault is abnormal in air leakage.
5. The method of claim 1, wherein the fourth preset parameter associated with a fire fault comprises: at least one of ignition angle information, ignition angle fluctuation information, ignition energy information and ignition ring information of the engine;
the judging the reason of the fire path fault according to the fourth preset parameter includes:
if the ignition angle information is smaller than a preset ignition angle threshold value, or the ignition angle fluctuation is larger than a preset ignition angle fluctuation threshold value, determining that the fire path fault is abnormal in ignition angle; and/or the presence of a gas in the gas,
if the ignition energy information is larger than a first preset ignition angle energy and smaller than a second preset ignition angle energy, determining that the fire path fault is abnormal in ignition energy; and/or the presence of a gas in the atmosphere,
and if the ignition ring information is failed, determining that the fire path fault is the ignition ring fault.
6. The method according to claim 1, wherein the fifth preset parameter associated with the oil circuit fault comprises: at least one of oil rail pressure information, oil injection time deviation information, oil injection pulse width information and oil injector information of the engine;
the judging the reason of the oil circuit fault according to the fifth preset parameter includes:
if the oil rail pressure information is larger than a preset oil rail pressure threshold value, determining that the oil circuit fault is rail pressure abnormity; and/or the presence of a gas in the gas,
if the oil injection time deviation information is larger than a preset oil injection time deviation threshold value, determining that the oil circuit fault is abnormal at the oil injection time; and/or the presence of a gas in the gas,
if the oil injection pulse width is larger than the preset oil injection pulse width threshold value, determining that the oil path fault is the abnormal oil injection pulse width; and/or the presence of a gas in the gas,
and if the fuel injector information is that the fault occurs, determining that the fault of the oil way is the fault of the fuel injector.
7. The method of claim 1, wherein before acquiring engine status information when the engine misfire failure is detected and determining whether the engine misfire is true based on the engine status information, further comprising:
acquiring fire fault information, fire frequency information, ignition ring information and oil injector information of an engine;
if the fire fault information indicates that the fire fault occurs and/or the fire frequency information is greater than the preset fire frequency, reporting a related fault according to the ignition coil information, and determining the fire fault of the engine as the ignition coil fault;
if the fire fault information indicates that the fire fault occurs and/or the fire frequency information is greater than the preset fire frequency, reporting a related fault according to the fuel injector information, and determining that the fire fault of the engine is the fuel injector fault;
if the fire fault information indicates that the fire fault occurs, no relevant fault is reported according to the ignition ring information and the oil sprayer information, and/or if the fire frequency information is larger than the preset fire frequency, no relevant fault is reported according to the ignition ring information and the oil sprayer information, and whether the fire is true or not is judged according to the engine state information.
8. An engine misfire detection apparatus, characterized by comprising:
the first judgment module is used for acquiring the state information of the engine when the engine is detected to have the fire fault, and judging whether the engine is really on fire according to the state information of the engine;
the first acquisition module is used for acquiring a first preset parameter associated with a systematic fault, and/or a second preset parameter associated with an in-cylinder thermal environment fault, and/or a third preset parameter associated with a gas circuit fault, and/or a fourth preset parameter associated with a fire circuit fault, and/or a fifth preset parameter associated with an oil circuit fault if the fire is a true fire;
the second judgment module is used for judging the reason of the systematic fault according to the first preset parameter, and/or judging the reason of the thermal environment fault in the cylinder according to the second preset parameter, and/or judging the reason of the gas circuit fault according to the third preset parameter, and/or judging the reason of the fire circuit fault according to the fourth preset parameter, and/or judging the reason of the oil circuit fault according to the fifth preset parameter.
9. A vehicle, characterized by comprising: a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the engine misfire detection method according to any of claims 1-7.
10. A computer readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the engine misfire detection method according to any of claims 1-7.
CN202210345937.7A 2022-04-02 2022-04-02 Engine misfire detection method and device, vehicle and storage medium Active CN115263548B (en)

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