CN117307317A - Misfire diagnosis method, device, medium and computing equipment for automobile engine - Google Patents
Misfire diagnosis method, device, medium and computing equipment for automobile engine Download PDFInfo
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- CN117307317A CN117307317A CN202311605442.4A CN202311605442A CN117307317A CN 117307317 A CN117307317 A CN 117307317A CN 202311605442 A CN202311605442 A CN 202311605442A CN 117307317 A CN117307317 A CN 117307317A
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000003745 diagnosis Methods 0.000 title claims description 8
- 230000001133 acceleration Effects 0.000 claims abstract description 91
- 239000000446 fuel Substances 0.000 claims abstract description 48
- 239000004606 Fillers/Extenders Substances 0.000 claims abstract description 24
- 238000004880 explosion Methods 0.000 claims description 24
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 230000035939 shock Effects 0.000 claims description 11
- 238000002405 diagnostic procedure Methods 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 abstract description 8
- 230000006870 function Effects 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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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
- F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a method, medium, device and computing equipment for diagnosing the fire of an automobile engine, which comprise the steps of acquiring the rotation acceleration frequency of a crankshaft of an automobile when the condition of the fire of the automobile is detected; if the crankshaft rotation acceleration frequency is larger than a preset frequency threshold value, acquiring the air-fuel ratio in an exhaust system of the automobile; and if the air-fuel ratio is larger than a preset air-fuel ratio value, outputting fire fault information corresponding to the range extender of the automobile. The method and the device can judge the concentration of the air-fuel ratio in the exhaust system on the basis of judging the change rate of the acceleration of the crankshaft, determine the misfire condition of the engine and improve the accuracy of judging the misfire of the engine.
Description
Technical Field
The invention relates to the technical field of automobile safety, in particular to a method, a device, a medium and computing equipment for diagnosing fire of an automobile engine.
Background
Currently, a method for detecting a misfire of an engine of a vehicle generally judges the variation frequency of the crankshaft acceleration at the moment of ignition of a cylinder, and if the variation rate exceeds a preset threshold value, the engine of the vehicle is considered to be in a misfire. However, in practice, it is found that at some complicated working points, resonance shake generated by the engine and excitation of an external road surface are transmitted to the range extender through the vehicle body, and then transmitted to the internal crankshaft from the range extender, so that the rotation of the crankshaft is changed, and at this time, the change rate of the acceleration of the crankshaft may exceed a preset threshold value, so that the situation of misjudging the engine misfire occurs, and the judgment accuracy of the engine misfire is low.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the invention provides a method, a device, a medium and computing equipment for diagnosing the fire of an automobile engine, which can judge the concentration of an air-fuel ratio in an exhaust system on the basis of judging the change rate of the acceleration of a crankshaft, determine the condition of the fire of the engine and improve the accuracy of judging the fire of the engine.
According to an aspect of an embodiment of the present invention, there is provided a misfire diagnosis method of an automobile engine, including:
when detecting that the automobile has a fire, acquiring the crankshaft rotation acceleration frequency of the automobile;
if the crankshaft rotation acceleration frequency is larger than a preset frequency threshold value, acquiring the air-fuel ratio in an exhaust system of the automobile;
and if the air-fuel ratio is larger than a preset air-fuel ratio value, outputting fire fault information corresponding to the range extender of the automobile.
As an alternative embodiment, the method further comprises:
monitoring the knock value of the automobile through a knock sensor to obtain a real-time current knock value;
acquiring a vehicle model of the automobile;
determining a preset knock threshold value matched with the vehicle model;
and if the current knock value is larger than the preset knock threshold value, determining that the automobile is detected to have the fire situation.
As an optional implementation manner, the determining the preset knock threshold matched with the vehicle model includes:
acquiring vehicle displacement and engine type corresponding to the vehicle model; wherein the engine types include at least a self-priming type and a turbo-charging type;
determining a vibration and explosion interval corresponding to the type of the engine;
and determining a preset shock threshold matched with the vehicle displacement from the shock interval.
As an alternative embodiment, the acquiring the rotational acceleration frequency of the crankshaft of the automobile includes:
acquiring acquisition time length and current time;
determining an acquisition time period according to the acquisition time length and the current time; the duration of the acquisition time period is the same as the acquisition duration, and the ending time of the acquisition time period is the current time;
acquiring the rotational acceleration frequency of crankshafts to be screened of a plurality of automobiles acquired in the acquisition time period;
and determining the maximum crankshaft rotational acceleration frequency to be screened as the crankshaft rotational acceleration frequency of the automobile.
As an optional implementation manner, the acquiring the air-fuel ratio in the exhaust system of the automobile if the crankshaft rotational acceleration frequency is greater than a preset frequency threshold value includes:
if the crankshaft rotation acceleration frequency is larger than a preset frequency threshold value, acquiring the target number of the crankshaft rotation acceleration frequency to be screened, which is larger than the preset frequency threshold value, in the crankshaft rotation acceleration frequency to be screened;
determining the total number of the crankshaft rotational acceleration frequencies to be screened;
determining a quantity ratio from the target quantity and the total quantity;
and if the number ratio is larger than the preset number ratio, acquiring the air-fuel ratio in the exhaust system of the automobile.
As an alternative embodiment, the preset air-fuel ratio value is 1.05.
As an optional implementation manner, the outputting the fire fault information corresponding to the range extender of the automobile includes:
acquiring the current fire value;
updating the current fire value to obtain fire fault information corresponding to the range extender of the automobile;
and outputting the fire fault information.
According to another aspect of the embodiment of the present invention, there is also provided a misfire diagnostic apparatus of an automobile engine, including:
the first acquisition unit is used for acquiring the crankshaft rotation acceleration frequency of the automobile when the situation that the automobile is in fire is detected;
the second acquisition unit is used for acquiring the air-fuel ratio in the exhaust system of the automobile if the crankshaft rotation acceleration frequency is greater than a preset frequency threshold value;
and the output unit is used for outputting fire fault information corresponding to the range extender of the automobile if the air-fuel ratio is larger than a preset ratio.
According to yet another aspect of an embodiment of the present invention, there is also provided a computing device including: at least one processor, memory, and input output unit; the memory is used for storing a computer program, and the processor is used for calling the computer program stored in the memory to execute the fire diagnosis method of the automobile engine.
According to still another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium including instructions that, when run on a computer, cause the computer to perform the misfire diagnostic method of an automotive engine described above.
In the embodiment of the invention, when the situation that the automobile is in fire is detected, the crankshaft rotation acceleration frequency of the automobile can be obtained; if the crankshaft rotation acceleration frequency is larger than a preset frequency threshold value, acquiring the air-fuel ratio in an exhaust system of the automobile; and if the air-fuel ratio is larger than a preset air-fuel ratio value, outputting fire fault information corresponding to the range extender of the automobile. Therefore, the concentration of the air-fuel ratio in the exhaust system can be judged on the basis of judging the change rate of the acceleration of the crankshaft, the misfire condition of the engine is determined, and the accuracy of the misfire judgment of the engine is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a flow chart of an alternative method of diagnosing misfire of an automotive engine according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural view of an alternative misfire diagnostic apparatus of an automotive engine according to an embodiment of the present invention;
FIG. 3 schematically illustrates a schematic structural diagram of a medium according to an embodiment of the present invention;
FIG. 4 schematically illustrates a structural diagram of a computing device in accordance with embodiments of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring now to fig. 1, fig. 1 is a flowchart illustrating a misfire diagnosis method of an automotive engine according to an embodiment of the present invention. It should be noted that embodiments of the present invention may be applied to any scenario where applicable.
The flow of the misfire diagnosis method of the automobile engine according to the embodiment of the invention shown in fig. 1 includes:
and step S101, when the situation that the automobile is in fire is detected, acquiring the frequency of the rotation acceleration of the crankshaft of the automobile.
In the embodiment of the invention, the frequency of the crankshaft rotation acceleration of the automobile can be determined by monitoring the frequency of the change (continuous running) of the crankshaft acceleration corresponding to the ignition moment of the cylinder. The frequency of the crankshaft rotational acceleration has a specific acceleration frequency during normal ignition, and when a misfire condition occurs, the frequency of the crankshaft rotational acceleration changes, and a vehicle-mounted computer (ECU) can compare the frequency of the crankshaft rotational acceleration as a measured value with a preset frequency threshold value to determine whether a misfire fault exists.
As an alternative embodiment, the manner of detecting the occurrence of the fire condition of the automobile may specifically be:
monitoring the knock value of the automobile through a knock sensor to obtain a real-time current knock value;
acquiring a vehicle model of the automobile;
determining a preset knock threshold value matched with the vehicle model;
and if the current knock value is larger than the preset knock threshold value, determining that the automobile is detected to have the fire situation.
According to the implementation mode, when the situation that the explosion value of the automobile is larger than the preset explosion threshold matched with the vehicle model of the automobile is detected, the situation that the automobile is in fire is determined, so that the situation of the fire of the automobile can be timely monitored, and the timeliness of the automobile fire detection function is improved.
In the embodiment of the invention, the knock sensor can measure the engine shake degree and is used for adjusting the ignition advance angle when the engine knocks. If the vehicle explosion value is larger than the preset explosion threshold value, the situation of the fire of the automobile can be considered, and the situation of the fire needs to be diagnosed.
Optionally, the manner of determining the preset knock threshold matched with the vehicle model may specifically be:
acquiring vehicle displacement and engine type corresponding to the vehicle model; wherein the engine types include at least a self-priming type and a turbo-charging type;
determining a vibration and explosion interval corresponding to the type of the engine;
and determining a preset shock threshold matched with the vehicle displacement from the shock interval.
According to the implementation mode, the explosion zone can be determined according to the type of the transmitter of the automobile, and the preset explosion threshold value can be determined from the explosion zone according to the displacement of the automobile, so that the determined preset explosion threshold value is more consistent with the actual situation of the automobile, and the rationality of determining the fire situation of the automobile based on the preset explosion threshold value is improved.
In the embodiment of the invention, the corresponding vibration and explosion intervals of different engine types are different. For example, the knock region of a self-priming type engine is [0,0.7], and the knock region of a turbocharged type engine is [0.8,0.9]. And the determination of the explosion threshold value by different vehicle displacement also has a certain influence.
In the embodiment of the invention, the vehicle displacement can acquire the maximum shock value under normal conditions in the shock interval as the preset shock threshold value of the automobile, thereby ensuring the accuracy of automobile fire judgment.
As an alternative embodiment, the manner of acquiring the crankshaft rotational acceleration frequency of the automobile in step S101 may specifically be:
acquiring acquisition time length and current time;
determining an acquisition time period according to the acquisition time length and the current time; the duration of the acquisition time period is the same as the acquisition duration, and the ending time of the acquisition time period is the current time;
acquiring the rotational acceleration frequency of crankshafts to be screened of a plurality of automobiles acquired in the acquisition time period;
and determining the maximum crankshaft rotational acceleration frequency to be screened as the crankshaft rotational acceleration frequency of the automobile.
In the implementation of the embodiment, a plurality of crankshaft rotational acceleration frequencies to be screened can be obtained from an acquisition time period determined according to the acquisition time length and the current time, and the crankshaft rotational acceleration frequency with the largest value as the crankshaft rotational acceleration frequency of the automobile can be determined from the plurality of crankshaft rotational acceleration frequencies to be screened; because the cause of the automobile fire can be deduced based on the crankshaft rotation acceleration frequency of the automobile, the crankshaft rotation acceleration frequency with the largest value is obtained from a time period, and the accuracy of judging the cause of the automobile fire can be improved.
Step S102, if the crankshaft rotational acceleration frequency is greater than a preset frequency threshold, acquiring an air-fuel ratio in an exhaust system of the automobile.
In the embodiment of the invention, the air-fuel ratio may be a ratio of the mass of air and fuel in the mixture, that is, a ratio of the mass of air and fuel in an exhaust system of an automobile. Normally, air is burned out, and a large amount of air is not present in the exhaust system, so if the air content in the exhaust system is greater than a preset air-fuel ratio value, it can be considered that the engine is in a misfire condition, and unburned air enters the exhaust system.
As an optional implementation manner, if the crankshaft rotational acceleration frequency is greater than the preset frequency threshold in step S102, the manner of obtaining the air-fuel ratio in the exhaust system of the automobile may specifically be:
if the crankshaft rotation acceleration frequency is larger than a preset frequency threshold value, acquiring the target number of the crankshaft rotation acceleration frequency to be screened, which is larger than the preset frequency threshold value, in the crankshaft rotation acceleration frequency to be screened;
determining the total number of the crankshaft rotational acceleration frequencies to be screened;
determining a quantity ratio from the target quantity and the total quantity;
and if the number ratio is larger than the preset number ratio, acquiring the air-fuel ratio in the exhaust system of the automobile.
When the frequency of the detected crankshaft rotational acceleration is larger than the preset frequency threshold, a quantity ratio of the frequency of the crankshaft rotational acceleration to be screened, which is acquired in the acquisition time period, to be larger than the preset frequency threshold can be calculated, and if the quantity ratio is larger than the preset quantity ratio, the detected frequency of the crankshaft rotational acceleration, which is larger than the preset frequency threshold, is not the frequency detected accidentally, namely the frequency of the crankshaft rotational acceleration has credibility.
Step S103, if the air-fuel ratio is larger than a preset air-fuel ratio value, outputting fire fault information corresponding to a range extender of the automobile.
In the embodiment of the present invention, the preset air-fuel ratio value may be 1.05.
As an optional implementation manner, the outputting, in step S103, the misfire fault information corresponding to the range extender of the automobile may specifically be:
acquiring the current fire value;
updating the current fire value to obtain fire fault information corresponding to the range extender of the automobile;
and outputting the fire fault information.
By implementing the embodiment, after the range extender is determined to be in fire, the current fire value can be updated, so that the current fire value contains the number of the range extenders in the detected fire, and the accuracy of the fire fault information statistics is ensured.
The method and the device can judge the concentration of the air-fuel ratio in the exhaust system on the basis of judging the change rate of the acceleration of the crankshaft, determine the misfire condition of the engine and improve the accuracy of judging the misfire of the engine. In addition, the method and the device can also improve the timeliness of the automobile fire detection function. In addition, the method and the device can further improve the rationality of determining the automobile fire situation based on the preset explosion threshold. In addition, the method and the device can also improve the accuracy of judging the cause of the automobile fire. In addition, the invention can also determine that the frequency of the crankshaft rotational acceleration has reliability. In addition, the invention can also ensure the accuracy of the fire fault information statistics.
Having described the method of an exemplary embodiment of the present invention, next, a misfire diagnostic apparatus of an automotive engine of an exemplary embodiment of the present invention will be described with reference to fig. 2, the apparatus including:
a first acquisition unit 201 for acquiring a crankshaft rotational acceleration frequency of an automobile when a misfire condition of the automobile is detected;
a second obtaining unit 202, configured to obtain an air-fuel ratio in an exhaust system of the automobile if the crankshaft rotational acceleration frequency obtained by the first obtaining unit 201 is greater than a preset frequency threshold;
and an output unit 203, configured to output the fire fault information corresponding to the range extender of the automobile if the air-fuel ratio acquired by the second acquiring unit 202 is greater than a preset ratio.
As an alternative embodiment, the first obtaining unit 201 is further configured to:
monitoring the knock value of the automobile through a knock sensor to obtain a real-time current knock value;
acquiring a vehicle model of the automobile;
determining a preset knock threshold value matched with the vehicle model;
and if the current knock value is larger than the preset knock threshold value, determining that the automobile is detected to have the fire situation.
According to the implementation mode, when the situation that the explosion value of the automobile is larger than the preset explosion threshold matched with the vehicle model of the automobile is detected, the situation that the automobile is in fire is determined, so that the situation of the fire of the automobile can be timely monitored, and the timeliness of the automobile fire detection function is improved.
As an alternative embodiment, the manner in which the first obtaining unit 201 determines the preset knock threshold value matched with the vehicle model may specifically be:
acquiring vehicle displacement and engine type corresponding to the vehicle model; wherein the engine types include at least a self-priming type and a turbo-charging type;
determining a vibration and explosion interval corresponding to the type of the engine;
and determining a preset shock threshold matched with the vehicle displacement from the shock interval.
According to the implementation mode, the explosion zone can be determined according to the type of the transmitter of the automobile, and the preset explosion threshold value can be determined from the explosion zone according to the displacement of the automobile, so that the determined preset explosion threshold value is more consistent with the actual situation of the automobile, and the rationality of determining the fire situation of the automobile based on the preset explosion threshold value is improved.
As an alternative embodiment, the manner in which the first acquisition unit 201 acquires the rotational acceleration frequency of the crankshaft of the automobile may specifically be:
acquiring acquisition time length and current time;
determining an acquisition time period according to the acquisition time length and the current time; the duration of the acquisition time period is the same as the acquisition duration, and the ending time of the acquisition time period is the current time;
acquiring the rotational acceleration frequency of crankshafts to be screened of a plurality of automobiles acquired in the acquisition time period;
and determining the maximum crankshaft rotational acceleration frequency to be screened as the crankshaft rotational acceleration frequency of the automobile.
In the implementation of the embodiment, a plurality of crankshaft rotational acceleration frequencies to be screened can be obtained from an acquisition time period determined according to the acquisition time length and the current time, and the crankshaft rotational acceleration frequency with the largest value as the crankshaft rotational acceleration frequency of the automobile can be determined from the plurality of crankshaft rotational acceleration frequencies to be screened; because the cause of the automobile fire can be deduced based on the crankshaft rotation acceleration frequency of the automobile, the crankshaft rotation acceleration frequency with the largest value is obtained from a time period, and the accuracy of judging the cause of the automobile fire can be improved.
As an alternative embodiment, if the crankshaft rotational acceleration frequency is greater than the preset frequency threshold, the second obtaining unit 202 may specifically obtain the air-fuel ratio in the exhaust system of the automobile by:
if the crankshaft rotation acceleration frequency is larger than a preset frequency threshold value, acquiring the target number of the crankshaft rotation acceleration frequency to be screened, which is larger than the preset frequency threshold value, in the crankshaft rotation acceleration frequency to be screened;
determining the total number of the crankshaft rotational acceleration frequencies to be screened;
determining a quantity ratio from the target quantity and the total quantity;
and if the number ratio is larger than the preset number ratio, acquiring the air-fuel ratio in the exhaust system of the automobile.
When the frequency of the detected crankshaft rotational acceleration is larger than the preset frequency threshold, a quantity ratio of the frequency of the crankshaft rotational acceleration to be screened, which is acquired in the acquisition time period, to be larger than the preset frequency threshold can be calculated, and if the quantity ratio is larger than the preset quantity ratio, the detected frequency of the crankshaft rotational acceleration, which is larger than the preset frequency threshold, is not the frequency detected accidentally, namely the frequency of the crankshaft rotational acceleration has credibility.
In the embodiment of the present invention, the preset air-fuel ratio value may be 1.05.
As an optional implementation manner, the outputting unit 203 outputs the fire fault information corresponding to the range extender of the automobile may specifically be:
acquiring the current fire value;
updating the current fire value to obtain fire fault information corresponding to the range extender of the automobile;
and outputting the fire fault information.
By implementing the embodiment, after the range extender is determined to be in fire, the current fire value can be updated, so that the current fire value contains the number of the range extenders in the detected fire, and the accuracy of the fire fault information statistics is ensured.
The method and the device can judge the concentration of the air-fuel ratio in the exhaust system on the basis of judging the change rate of the acceleration of the crankshaft, determine the misfire condition of the engine and improve the accuracy of judging the misfire of the engine. In addition, the method and the device can also improve the timeliness of the automobile fire detection function. In addition, the method and the device can further improve the rationality of determining the automobile fire situation based on the preset explosion threshold. In addition, the method and the device can also improve the accuracy of judging the cause of the automobile fire. In addition, the invention can also determine that the frequency of the crankshaft rotational acceleration has reliability. In addition, the invention can also ensure the accuracy of the fire fault information statistics.
Having described the method and apparatus of the exemplary embodiments of the present invention, reference will now be made to fig. 3 for describing a computer-readable storage medium of the exemplary embodiments of the present invention, and reference will be made to fig. 3 for showing a computer-readable storage medium that is an optical disc 30 having a computer program (i.e., a program product) stored thereon that, when executed by a processor, implements the steps described in the above-described method embodiments, for example, when a misfire condition of an automobile is detected, acquiring a crankshaft rotational acceleration frequency of the automobile; if the crankshaft rotation acceleration frequency is larger than a preset frequency threshold value, acquiring the air-fuel ratio in an exhaust system of the automobile; if the air-fuel ratio is larger than a preset air-fuel ratio value, outputting fire fault information corresponding to a range extender of the automobile; the specific implementation of each step is not repeated here.
It should be noted that examples of the computer readable storage medium may also include, but are not limited to, a phase change memory (PRAM), a Static Random Access Memory (SRAM), a Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a flash memory, or other optical or magnetic storage medium, which will not be described in detail herein.
Having described the methods, media, and apparatus of exemplary embodiments of the present invention, next, a computing device for misfire diagnosis of an automotive engine of exemplary embodiments of the present invention is described with reference to FIG. 4.
FIG. 4 illustrates a block diagram of an exemplary computing device 40 suitable for use in implementing embodiments of the invention, the computing device 40 may be a computer system or a server. The computing device 40 shown in fig. 4 is merely an example and should not be taken as limiting the functionality and scope of use of embodiments of the present invention.
As shown in fig. 4, components of computing device 40 may include, but are not limited to: one or more processors or processing units 401, a system memory 402, a bus 403 that connects the various system components (including the system memory 402 and the processing units 401).
Computing device 40 typically includes a variety of computer system readable media. Such media can be any available media that is accessible by computing device 40 and includes both volatile and nonvolatile media, removable and non-removable media.
The system memory 402 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) 4021 and/or cache memory 4022. Computing device 40 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, ROM4023 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 4 and commonly referred to as a "hard disk drive"). Although not shown in fig. 4, a magnetic disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media), may be provided. In such cases, each drive may be coupled to bus 403 through one or more data medium interfaces. The system memory 402 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of the embodiments of the invention.
A program/utility 4025 having a set (at least one) of program modules 4024 may be stored, for example, in system memory 402, and such program modules 4024 include, but are not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules 4024 generally perform the functions and/or methodologies of the described embodiments of the present invention.
Computing device 40 may also communicate with one or more external devices 404 (e.g., keyboard, pointing device, display, etc.). Such communication may occur through an input/output (I/O) interface 405. Moreover, computing device 40 may also communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet, through network adapter 406. As shown in fig. 4, network adapter 406 communicates with other modules of computing device 40, such as processing unit 401, etc., over bus 403. It should be appreciated that although not shown in fig. 4, other hardware and/or software modules may be used in connection with computing device 40.
The processing unit 401 executes various functional applications and data processing by running a program stored in the system memory 402, for example, acquires a crankshaft rotational acceleration frequency of an automobile when a misfire condition of the automobile is detected; if the crankshaft rotation acceleration frequency is larger than a preset frequency threshold value, acquiring the air-fuel ratio in an exhaust system of the automobile; and if the air-fuel ratio is larger than a preset air-fuel ratio value, outputting fire fault information corresponding to the range extender of the automobile. The specific implementation of each step is not repeated here. It should be noted that although several units/modules or sub-units/sub-modules of a misfire diagnostic apparatus of an automotive engine are mentioned in the above detailed description, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more units/modules described above may be embodied in one unit/module in accordance with embodiments of the present invention. Conversely, the features and functions of one unit/module described above may be further divided into ones that are embodied by a plurality of units/modules.
In the description of the present invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer readable storage medium executable by a processor. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Furthermore, although the operations of the methods of the present invention are depicted in the drawings in a particular order, this is not required to either imply that the operations must be performed in that particular order or that all of the illustrated operations be performed to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform.
Claims (10)
1. A misfire diagnostic method of an automotive engine, comprising:
when detecting that the automobile has a fire, acquiring the crankshaft rotation acceleration frequency of the automobile;
if the crankshaft rotation acceleration frequency is larger than a preset frequency threshold value, acquiring the air-fuel ratio in an exhaust system of the automobile;
and if the air-fuel ratio is larger than a preset air-fuel ratio value, outputting fire fault information corresponding to the range extender of the automobile.
2. The misfire diagnostic method of the automotive engine of claim 1, the method further comprising:
monitoring the knock value of the automobile through a knock sensor to obtain a real-time current knock value;
acquiring a vehicle model of the automobile;
determining a preset knock threshold value matched with the vehicle model;
and if the current knock value is larger than the preset knock threshold value, determining that the automobile is detected to have the fire situation.
3. The misfire diagnostic method of the automotive engine of claim 2, the determining a preset knock threshold matching the vehicle model, comprising:
acquiring vehicle displacement and engine type corresponding to the vehicle model; wherein the engine types include at least a self-priming type and a turbo-charging type;
determining a vibration and explosion interval corresponding to the type of the engine;
and determining a preset shock threshold matched with the vehicle displacement from the shock interval.
4. A misfire diagnostic method for an automotive engine according to any one of claims 1 to 3, the acquiring a crankshaft rotational acceleration frequency of the automobile comprising:
acquiring acquisition time length and current time;
determining an acquisition time period according to the acquisition time length and the current time; the duration of the acquisition time period is the same as the acquisition duration, and the ending time of the acquisition time period is the current time;
acquiring the rotational acceleration frequency of crankshafts to be screened of a plurality of automobiles acquired in the acquisition time period;
and determining the maximum crankshaft rotational acceleration frequency to be screened as the crankshaft rotational acceleration frequency of the automobile.
5. The misfire diagnostic method of the automotive engine of claim 4 wherein the acquiring the air-fuel ratio in the exhaust system of the automobile if the crankshaft rotational acceleration frequency is greater than a preset frequency threshold value comprises:
if the crankshaft rotation acceleration frequency is larger than a preset frequency threshold value, acquiring the target number of the crankshaft rotation acceleration frequency to be screened, which is larger than the preset frequency threshold value, in the crankshaft rotation acceleration frequency to be screened;
determining the total number of the crankshaft rotational acceleration frequencies to be screened;
determining a quantity ratio from the target quantity and the total quantity;
and if the number ratio is larger than the preset number ratio, acquiring the air-fuel ratio in the exhaust system of the automobile.
6. The misfire diagnostic method for an automotive engine according to any one of claims 1 to 3, the preset air-fuel ratio value being 1.05.
7. The misfire diagnosis method of an automotive engine according to any one of claims 1 to 3, the outputting of the misfire failure information corresponding to the range extender of the automobile, comprising:
acquiring the current fire value;
updating the current fire value to obtain fire fault information corresponding to the range extender of the automobile;
and outputting the fire fault information.
8. A misfire diagnostic apparatus of an automotive engine, comprising:
the first acquisition unit is used for acquiring the crankshaft rotation acceleration frequency of the automobile when the situation that the automobile is in fire is detected;
the second acquisition unit is used for acquiring the air-fuel ratio in the exhaust system of the automobile if the crankshaft rotation acceleration frequency is greater than a preset frequency threshold value;
and the output unit is used for outputting fire fault information corresponding to the range extender of the automobile if the air-fuel ratio is larger than a preset ratio.
9. A computing device, the computing device comprising:
at least one processor, memory, and input output unit;
wherein the memory is for storing a computer program and the processor is for invoking the computer program stored in the memory to perform the method of any of claims 1-7.
10. A computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method of any of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311605442.4A CN117307317A (en) | 2023-11-29 | 2023-11-29 | Misfire diagnosis method, device, medium and computing equipment for automobile engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311605442.4A CN117307317A (en) | 2023-11-29 | 2023-11-29 | Misfire diagnosis method, device, medium and computing equipment for automobile engine |
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