CN113217179A - Voltage-stabilizing air source electronic control air release valve pressurization control fault processing method and device - Google Patents
Voltage-stabilizing air source electronic control air release valve pressurization control fault processing method and device Download PDFInfo
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- CN113217179A CN113217179A CN202110495718.2A CN202110495718A CN113217179A CN 113217179 A CN113217179 A CN 113217179A CN 202110495718 A CN202110495718 A CN 202110495718A CN 113217179 A CN113217179 A CN 113217179A
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- 238000003672 processing method Methods 0.000 title claims description 6
- 239000002912 waste gas Substances 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 32
- 230000000087 stabilizing effect Effects 0.000 claims description 36
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 239000000446 fuel Substances 0.000 claims description 13
- 239000002699 waste material Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 claims 1
- 230000006866 deterioration Effects 0.000 abstract description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013270 controlled release Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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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
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
- F02B37/183—Arrangements of bypass valves or actuators therefor
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
- F02M35/10229—Fluid connections to the air intake system; their arrangement of pipes, valves or the like the intake system acting as a vacuum or overpressure source for auxiliary devices, e.g. brake systems; Vacuum chambers
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- 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
- Y02T10/12—Improving ICE efficiencies
-
- 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)
- Supercharger (AREA)
Abstract
The invention provides a method and a device for processing a pressurization control fault of a pressure-stabilizing air source electronic control air release valve, which are used for realizing closed-loop control of a waste gas bypass valve and a waste gas control valve by switching an air source of the waste gas bypass valve to an engine pressurization air inlet end to take air when the condition that a fault exists in a pressurization control system of the pressure-stabilizing air source electronic control air release valve and the pressure of a pressure-stabilizing air source is detected, effectively solving the problem of deterioration of indexes such as engine performance, emission and the like in the fault mode and ensuring the normal operation of an engine to the maximum extent.
Description
Technical Field
The invention relates to the technical field of electronic control engines, in particular to a method and a device for processing pressurization control faults of an electronic control air release valve of a pressure stabilizing air source.
Background
In order to improve the exhaust temperature of the natural gas engine, optimize the emission and the gas consumption of the engine and solve the problem of partial working condition surge of the engine, an electric control bleed valve control of a pressure stabilizing gas source is introduced into the national sixth natural gas engine to realize the full working condition control of the waste gas bypass valve.
However, in the practical application process, the pressure of the pressure-stabilizing air source is too low due to the problems of pipeline problem of the pressure-stabilizing air source, blockage, leakage, icing and the like of an air filter, so that the control of the waste gas bypass valve is abnormal, the performance, emission and gas consumption of the engine are influenced, and the engine is surged and damaged in severe cases.
Disclosure of Invention
In view of the above, the invention provides a method and a device for processing a pressurization control fault of an electronic control bleed valve of a regulated pressure air source, which solve the problem that the closed-loop control of a waste gas bypass valve and a waste gas control valve cannot be realized when the pressure of the regulated pressure air source is relatively low, and effectively solve the problem that the indexes of engine performance, emission and the like are deteriorated in the fault mode.
In order to achieve the above purpose, the invention provides the following specific technical scheme:
a method for processing pressurization control fault of an electronic control air release valve of a pressure-stabilized air source comprises the following steps:
under the condition that the pressure boost control system of the pressure stabilizing air source electronic control air release valve is detected to have a fault, judging whether the pressure of the pressure stabilizing air source is low or not;
and under the condition that the pressure of the pressure stabilizing air source is determined to be lower, switching the air source of the waste gas bypass valve to the supercharging air inlet end of the engine for air extraction.
Optionally, detecting that there is a fault in the pressurization control system of the electrically controlled release valve of the regulated pressure air source includes:
acquiring the rotating speed of the engine and the required supercharging pressure;
judging whether the engine speed and the required supercharging pressure are both greater than corresponding threshold values;
under the condition that the engine speed and the required boost pressure are both greater than corresponding threshold values, acquiring actual boost pressure;
judging whether the absolute value of the difference between the required boost pressure and the actual boost pressure is greater than a threshold value;
and determining that the fault exists in the pressurization control system of the pressure-stabilizing air source electronic control air release valve under the condition that the absolute value of the difference is greater than the threshold value.
Optionally, the determining whether the pressure of the regulated air source is relatively low includes:
judging whether the pressure of the air inlet end of the waste gas bypass valve does not exceed a threshold value;
under the condition that the pressure at the air inlet end of the waste gate valve does not exceed a threshold value, judging whether the duration time that the pressure at the air inlet end of the waste gate valve does not exceed the threshold value exceeds the threshold value or not;
determining that the pressure of the regulated air supply is low when the duration exceeds a threshold;
and determining that the pressure of the steady air source is not lower under the condition that the duration time does not exceed the threshold value.
Optionally, switching the air supply of the waste gate valve to the engine supercharging air inlet end for air extraction includes:
judging whether the engine enters a fuel cut-off working condition or not;
and switching the air source of the waste gas bypass valve to the supercharging air inlet end of the engine to take air under the condition that the engine enters the fuel cut-off working condition.
Optionally, after determining that the pressure of the steady-pressure air source is lower, the method further includes:
and prompting that the pressure of the pressure stabilizing air source is lower.
A pressure-stabilizing air source electronic control air release valve pressurization control fault processing device comprises:
the pressure stabilizing air source detection unit is used for judging whether the pressure of the pressure stabilizing air source is low or not under the condition that the pressure boost control system of the pressure stabilizing air source electronic control deflation valve is detected to have a fault;
and the air source switching unit is used for switching the air source of the waste gas bypass valve to the supercharging air inlet end of the engine to take air under the condition that the pressure of the pressure stabilizing air source is determined to be lower.
Optionally, the apparatus further includes a fault detection unit, specifically configured to:
acquiring the rotating speed of the engine and the required supercharging pressure;
judging whether the engine speed and the required supercharging pressure are both greater than corresponding threshold values;
under the condition that the engine speed and the required boost pressure are both greater than corresponding threshold values, acquiring actual boost pressure;
judging whether the absolute value of the difference between the required boost pressure and the actual boost pressure is greater than a threshold value;
and determining that the fault exists in the pressurization control system of the pressure-stabilizing air source electronic control air release valve under the condition that the absolute value of the difference is greater than the threshold value.
Optionally, the pressure-stabilizing air source detection unit is specifically configured to:
judging whether the pressure of the air inlet end of the waste gas bypass valve does not exceed a threshold value;
under the condition that the pressure at the air inlet end of the waste gate valve does not exceed a threshold value, judging whether the duration time that the pressure at the air inlet end of the waste gate valve does not exceed the threshold value exceeds the threshold value or not;
determining that the pressure of the regulated air supply is low when the duration exceeds a threshold;
and determining that the pressure of the steady air source is not lower under the condition that the duration time does not exceed the threshold value.
Optionally, the air source switching unit is specifically configured to:
judging whether the engine enters a fuel cut-off working condition or not;
and switching the air source of the waste gas bypass valve to the supercharging air inlet end of the engine to take air under the condition that the engine enters the fuel cut-off working condition.
Optionally, the apparatus further comprises:
and the prompting unit is used for prompting that the pressure of the pressure stabilizing air source is low after the pressure of the pressure stabilizing air source is determined to be low.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a method for processing the pressurization control fault of a pressure-stabilizing air source electronic control air release valve, which is characterized in that under the condition that the pressure control system of the pressure-stabilizing air source electronic control air release valve has a fault and the pressure of a pressure-stabilizing air source is relatively low, the air source of a waste gas bypass valve is switched to the pressurization air inlet end of an engine to take air, so that the closed-loop control of the waste gas bypass valve and a waste gas control valve is realized, the problem of deterioration of indexes such as engine performance, emission and the like in the fault mode is effectively solved, and the normal operation of the engine is ensured to the maximum extent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for handling pressurization control faults of an electronic control bleed valve of a pressure-stabilized air source, which is disclosed by the embodiment of the invention;
FIG. 2 is a schematic view of an air supply bypass apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating another method for handling pressurization control faults of an electronically controlled purge valve of a regulated pressure gas source according to an embodiment of the present invention;
FIG. 4 is a schematic flowchart of a method for detecting whether a failure occurs in a pressurization control system of an electronically controlled purge valve of a regulated air supply according to an embodiment of the present invention;
FIG. 5 is a schematic flowchart of a method for determining whether the pressure of the regulated air supply is low according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a pressurization control fault processing device of an electronic control bleed valve of a pressure-stabilized air source, which is disclosed by the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for processing a pressurization control fault of a pressure-stabilizing air source electronic control air release valve, which is applied to a vehicle-mounted ECU (electronic control unit) and realizes a fault diagnosis and processing method of a pressurization control system of the pressure-stabilizing air source electronic control air release valve, and particularly, referring to fig. 1, the method for processing the pressurization control fault of the pressure-stabilizing air source electronic control air release valve disclosed by the embodiment comprises the following steps:
s101: and detecting that a fault exists in a pressurization control system of the pressure stabilizing air source electronic control air release valve.
S102: and judging whether the pressure of the pressure stabilizing air source is lower or not.
In the case where it is determined that the pressure of the steady-pressure air source is relatively low, S103 is executed: and switching the air source of the waste gas bypass valve to the supercharging air inlet end of the engine to take air.
In the case where it is determined that the pressure of the steady-pressure air source is not excessively low, execution returns to S101.
The waste gas control valve (electric control valve) is a three-way electromagnetic valve, one section of the waste gas control valve is connected with a pressure stabilizing air source, one end of the waste gas control valve is exhausted to the atmosphere, the other end of the waste gas control valve is used for jacking the waste gas bypass valve, and the waste gas control valve has the function of controlling the on-off of the waste gas bypass valve.
A wastegate valve (mechanical valve) is a valve on the supercharger, and is used to discharge gas before the vortex to the vortex, thereby realizing supercharging control.
Referring to fig. 2, the ECU switches the air supply of the waste gate valve, that is, the intake air supply, to the supercharged intake end of the engine to take air by driving the duty ratio, and introduces the supercharged intake air of the engine to the control of the waste gate valve by adopting the supercharged intake end of the engine to take air.
Furthermore, in order to facilitate the user to find the fault that the pressure of the pressure-stabilizing air source is low in time, after the pressure of the pressure-stabilizing air source is determined to be low, the pressure of the pressure-stabilizing air source is prompted to be low, and the user is reminded to overhaul the pressure-stabilizing air source air supply system and the pipeline.
Meanwhile, in order to solve the problems of engine supercharging, detonation, surge and the like caused by the fact that the supercharging pressure of an engine is higher than the required supercharging pressure due to the low pressure of a pressure-stabilizing air source, the air source for controlling the waste gas bypass valve needs to be switched, the air inlet after the engine is supercharged is led to the control of the waste gas bypass valve in a mode of taking air from the supercharging air inlet end of the engine, but the working condition of the engine needs to be judged in order to not influence the fluctuation of the engine load caused by instantly switching the air source, and when the engine enters the oil-cut working condition, the air source of the waste gas bypass valve is switched to the supercharging air inlet end of the engine to take air, so that the smooth transition of the working condition of the engine is ensured.
On this basis, the embodiment discloses another pressure-stabilizing air source electronic control deflation valve pressurization control fault processing method, please refer to fig. 3, which includes the following steps:
s201: and detecting that a fault exists in a pressurization control system of the pressure stabilizing air source electronic control air release valve.
S202: and judging whether the pressure of the pressure stabilizing air source is lower or not.
In the case where it is determined that the pressure of the steady-pressure air source is not excessively low, execution returns to S201.
In the case where it is determined that the pressure of the steady-pressure air source is relatively low, S203: and judging whether the engine enters a fuel cut-off working condition or not.
Specifically, whether the oil cut-off working condition (over run) state is set or not is judged, if the oil cut-off working condition (over run) state is set, the engine is determined to enter the oil cut-off working condition, and otherwise, the engine is determined not to enter the oil cut-off working condition.
And if the engine does not enter the fuel cut-off working condition, returning to execute S202.
If the engine enters the fuel cut-off working condition, executing S204: and switching the air source of the waste gas bypass valve to the supercharging air inlet end of the engine to take air.
Specifically, referring to fig. 4, in the above embodiment, the method for detecting whether the pressurization control system of the steady-pressure air source electronic control purge valve has a fault includes the following steps:
s301: the engine speed and the required boost pressure are obtained.
The method for obtaining the required boost pressure may be any one of the existing methods, and will not be described herein.
S302: and judging whether the engine speed and the required supercharging pressure are both larger than corresponding threshold values.
It should be noted that a threshold is preset for the engine speed and a threshold is preset for the required boost pressure, and both thresholds are preset according to actual requirements and experimental data.
And returning to the step S301 when the engine speed and the required supercharging pressure are not both greater than the corresponding threshold values, namely the engine speed is not greater than the corresponding threshold values and/or the required supercharging pressure is not greater than the corresponding threshold values.
In the case where both the engine speed and the required boost pressure are greater than the respective thresholds, S303 is executed: the actual boost pressure is obtained.
S304: it is determined whether the absolute value of the difference between the required boost pressure and the actual boost pressure is greater than a threshold.
In the case where the absolute value of the difference is larger than the threshold, S305 is performed: and determining that the pressure boost control system of the pressure stabilizing air source electronic control air release valve has a fault.
In the case where the absolute value of the difference is not greater than the threshold, execution returns to S302.
Specifically, referring to fig. 5, in the above embodiment, the method for determining whether the pressure of the regulated air source is lower includes the following steps:
s401: it is determined whether the intake end pressure of the wastegate valve does not exceed a threshold value.
If the intake end pressure of the wastegate valve exceeds the threshold value, S402 is executed: and determining that the pressure of the pressure stabilizing air source is not low.
In the case where the intake end pressure of the wastegate valve does not exceed the threshold value, S403 is executed: it is determined whether the duration for which the intake end pressure of the wastegate valve does not exceed the threshold value exceeds the threshold value.
In case the duration exceeds a threshold, performing S404: and determining that the pressure of the pressure stabilizing air source is lower.
In case the duration does not exceed the threshold, S402 is performed.
That is, in the case where the intake end pressure of the wastegate valve does not exceed the threshold value and the duration during which the intake end pressure of the wastegate valve does not exceed the threshold value is greater than the threshold value, it is determined that the pressure of the regulated air supply is relatively low, and conversely, it is determined that the pressure of the regulated air supply is not relatively low.
In summary, according to the pressurization control fault processing method for the electronic control bleed valve for the regulated pressure air source disclosed in this embodiment, when it is detected that the pressurization control system for the electronic control bleed valve for the regulated pressure air source has a fault and the pressure of the regulated pressure air source is relatively low, the air source of the waste gas bypass valve is switched to the pressurization intake end of the engine to take air, so that the closed-loop control of the waste gas bypass valve and the waste gas control valve is realized, the problem of deterioration of indexes such as engine performance, emission and the like in the fault mode is effectively solved, and the normal operation of the engine is ensured to the maximum extent.
Based on the method for processing the pressurization control fault of the voltage-stabilizing air source electronic control release valve disclosed in the above embodiments, this embodiment correspondingly discloses a device for processing the pressurization control fault of the voltage-stabilizing air source electronic control release valve, please refer to fig. 6, and the device includes:
the pressure stabilizing air source detection unit 100 is used for judging whether the pressure of the pressure stabilizing air source is low or not under the condition that the pressure boost control system of the pressure stabilizing air source electronic control deflation valve is detected to have a fault;
and the air source switching unit 200 is used for switching the air source of the waste gas bypass valve to the supercharging air inlet end of the engine to take air under the condition that the pressure of the pressure stabilizing air source is determined to be lower.
Optionally, the apparatus further includes a fault detection unit, specifically configured to:
acquiring the rotating speed of the engine and the required supercharging pressure;
judging whether the engine speed and the required supercharging pressure are both greater than corresponding threshold values;
under the condition that the engine speed and the required boost pressure are both greater than corresponding threshold values, acquiring actual boost pressure;
judging whether the absolute value of the difference between the required boost pressure and the actual boost pressure is greater than a threshold value;
and determining that the fault exists in the pressurization control system of the pressure-stabilizing air source electronic control air release valve under the condition that the absolute value of the difference is greater than the threshold value.
Optionally, the pressure-stabilized air source detecting unit 100 is specifically configured to:
judging whether the pressure of the air inlet end of the waste gas bypass valve does not exceed a threshold value;
under the condition that the pressure at the air inlet end of the waste gate valve does not exceed a threshold value, judging whether the duration time that the pressure at the air inlet end of the waste gate valve does not exceed the threshold value exceeds the threshold value or not;
determining that the pressure of the regulated air supply is low when the duration exceeds a threshold;
and determining that the pressure of the steady air source is not lower under the condition that the duration time does not exceed the threshold value.
Optionally, the air source switching unit 200 is specifically configured to:
judging whether the engine enters a fuel cut-off working condition or not;
and switching the air source of the waste gas bypass valve to the supercharging air inlet end of the engine to take air under the condition that the engine enters the fuel cut-off working condition.
Optionally, the apparatus further comprises:
and the prompting unit is used for prompting that the pressure of the pressure stabilizing air source is low after the pressure of the pressure stabilizing air source is determined to be low.
According to the pressurization control fault processing device for the electronic control bleed valve of the pressure-stabilized air source, when the situation that the pressurization control system of the electronic control bleed valve of the pressure-stabilized air source has a fault and the pressure of the pressure-stabilized air source is low is detected, the air source of the waste gas bypass valve is switched to the pressurization air inlet end of the engine to take air, so that the closed-loop control of the waste gas bypass valve and the waste gas control valve is realized, the problem that indexes such as engine performance, emission and the like are deteriorated in the fault mode is effectively solved, and the normal operation of the engine is ensured to the maximum extent.
The embodiments in the present description 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. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further 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 apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above embodiments can be combined arbitrarily, and the features described in the embodiments in the present specification can be replaced or combined with each other in the above description of the disclosed embodiments, so that those skilled in the art can implement or use the present application.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A pressure-stabilizing air source electronic control air release valve pressurization control fault processing method is characterized by comprising the following steps:
under the condition that the pressure boost control system of the pressure stabilizing air source electronic control air release valve is detected to have a fault, judging whether the pressure of the pressure stabilizing air source is low or not;
and under the condition that the pressure of the pressure stabilizing air source is determined to be lower, switching the air source of the waste gas bypass valve to the supercharging air inlet end of the engine for air extraction.
2. The method of claim 1, wherein detecting a malfunction in a pressurization control system of the regulated-pressure-source electronically-controlled bleed valve comprises:
acquiring the rotating speed of the engine and the required supercharging pressure;
judging whether the engine speed and the required supercharging pressure are both greater than corresponding threshold values;
under the condition that the engine speed and the required boost pressure are both greater than corresponding threshold values, acquiring actual boost pressure;
judging whether the absolute value of the difference between the required boost pressure and the actual boost pressure is greater than a threshold value;
and determining that the fault exists in the pressurization control system of the pressure-stabilizing air source electronic control air release valve under the condition that the absolute value of the difference is greater than the threshold value.
3. The method of claim 1, wherein the determining whether the pressure of the regulated air supply is low comprises:
judging whether the pressure of the air inlet end of the waste gas bypass valve does not exceed a threshold value;
under the condition that the pressure at the air inlet end of the waste gate valve does not exceed a threshold value, judging whether the duration time that the pressure at the air inlet end of the waste gate valve does not exceed the threshold value exceeds the threshold value or not;
determining that the pressure of the regulated air supply is low when the duration exceeds a threshold;
and determining that the pressure of the steady air source is not lower under the condition that the duration time does not exceed the threshold value.
4. The method of claim 1, wherein switching the source of wastegate air to engine charge air intake comprises:
judging whether the engine enters a fuel cut-off working condition or not;
and switching the air source of the waste gas bypass valve to the supercharging air inlet end of the engine to take air under the condition that the engine enters the fuel cut-off working condition.
5. The method of claim 1, wherein after determining that the pressure of the regulated air supply is low, the method further comprises:
and prompting that the pressure of the pressure stabilizing air source is lower.
6. The utility model provides an automatically controlled bleed valve pressure boost control fault handling device of steady voltage air supply which characterized in that, the device includes:
the pressure stabilizing air source detection unit is used for judging whether the pressure of the pressure stabilizing air source is low or not under the condition that the pressure boost control system of the pressure stabilizing air source electronic control deflation valve is detected to have a fault;
and the air source switching unit is used for switching the air source of the waste gas bypass valve to the supercharging air inlet end of the engine to take air under the condition that the pressure of the pressure stabilizing air source is determined to be lower.
7. The apparatus according to claim 6, further comprising a fault detection unit, in particular configured to:
acquiring the rotating speed of the engine and the required supercharging pressure;
judging whether the engine speed and the required supercharging pressure are both greater than corresponding threshold values;
under the condition that the engine speed and the required boost pressure are both greater than corresponding threshold values, acquiring actual boost pressure;
judging whether the absolute value of the difference between the required boost pressure and the actual boost pressure is greater than a threshold value;
and determining that the fault exists in the pressurization control system of the pressure-stabilizing air source electronic control air release valve under the condition that the absolute value of the difference is greater than the threshold value.
8. The apparatus according to claim 6, wherein the steady-pressure gas source detecting unit is specifically configured to:
judging whether the pressure of the air inlet end of the waste gas bypass valve does not exceed a threshold value;
under the condition that the pressure at the air inlet end of the waste gate valve does not exceed a threshold value, judging whether the duration time that the pressure at the air inlet end of the waste gate valve does not exceed the threshold value exceeds the threshold value or not;
determining that the pressure of the regulated air supply is low when the duration exceeds a threshold;
and determining that the pressure of the steady air source is not lower under the condition that the duration time does not exceed the threshold value.
9. The apparatus according to claim 6, wherein the gas source switching unit is specifically configured to:
judging whether the engine enters a fuel cut-off working condition or not;
and switching the air source of the waste gas bypass valve to the supercharging air inlet end of the engine to take air under the condition that the engine enters the fuel cut-off working condition.
10. The apparatus of claim 6, further comprising:
and the prompting unit is used for prompting that the pressure of the pressure stabilizing air source is low after the pressure of the pressure stabilizing air source is determined to be low.
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