CN110873645A - Exhaust gas recirculation valve reliability judgment method and device and storage medium - Google Patents
Exhaust gas recirculation valve reliability judgment method and device and storage medium Download PDFInfo
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- CN110873645A CN110873645A CN201911219167.6A CN201911219167A CN110873645A CN 110873645 A CN110873645 A CN 110873645A CN 201911219167 A CN201911219167 A CN 201911219167A CN 110873645 A CN110873645 A CN 110873645A
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Abstract
The invention discloses a method for judging the reliability of an exhaust gas recirculation valve, which comprises the following steps: controlling the engine to test in sequence under various test working conditions, wherein the test working conditions comprise an operation working condition, an idling working condition and a shutdown working condition, and the engine self-learns under the shutdown working condition; after the test is finished, acquiring self-learning data, and a carbon accumulation value and a coking value of the engine; and determining the reliability of an exhaust gas recirculation valve connected with the engine according to the self-learning data, the carbon accumulation value and the coking value of the engine. The invention also discloses a terminal device and a computer readable storage medium. According to the reliability judgment method for the exhaust gas recirculation valve, after the engine is controlled to be tested in sequence under each test working condition, the reliability of the exhaust gas recirculation valve arranged on the engine is judged according to the acquired self-learning data, the carbon accumulation value and the coking value of the engine, so that the reliability detection of the exhaust gas recirculation valve is realized, and the problem that the whole vehicle cannot work normally due to the low reliability of the exhaust gas recirculation valve is avoided.
Description
Technical Field
The invention relates to the technical field of automobile testing, in particular to a method and equipment for judging reliability of an exhaust gas recirculation valve and a readable storage medium.
Background
EGR (Exhaust Gas Recirculation) is a widely used technique in which a part of Exhaust Gas is reintroduced into a combustion chamber to participate in a combustion reaction together with fresh air, and a characteristic that a large amount of inert Gas contained in the Exhaust Gas has a high specific heat capacity is utilized to reduce NO in Exhaust pollutantsXThe composition of (1). In the exhaust gas recirculation technology, an exhaust gas recirculation valve is a key component, and the exhaust gas recirculation valve is one of key parts of an engine and has the function of reducing nitrogen oxides in emission. Through analyzing faults of the exhaust gas recirculation valve in the market, the engine exhaust gas recirculation valve can generate coking, clamping stagnation and self-learning faults when the vehicle runs under urban working conditions with lower temperature in winter, so that the exhaust gas recirculation valve cannot work normally and the control accuracy is low.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a method and equipment for judging the reliability of an exhaust gas recirculation valve and a readable storage medium, aiming at solving the problems that the exhaust gas recirculation valve cannot work normally and the control accuracy is low due to low reliability of the exhaust gas recirculation valve under the urban working condition of low temperature in winter so as to improve the reliability of the exhaust gas recirculation valve.
In order to achieve the above object, the present invention provides a method for determining reliability of an exhaust gas recirculation valve, including:
controlling an engine to test in sequence under various test working conditions, wherein the test working conditions comprise an operation working condition, an idling working condition and a shutdown working condition, and the engine self-learns under the shutdown working condition;
after the test is finished, acquiring self-learning data, a carbon accumulation value of the engine and a coking value of the engine;
determining the reliability of an exhaust gas recirculation valve connected to an engine based on the self-learning data, the carbon accumulation value of the engine, and the coking value of the engine.
Optionally, the idle condition is operated after each of the operating conditions.
Optionally, a shutdown condition is operated after the idle condition.
Optionally, the test duration corresponding to each test condition is different.
Optionally, the step of determining the reliability of an exhaust gas recirculation valve coupled to an engine based on the self-learning data, the carbon accumulation value of the engine, and the coking value of the engine comprises:
comparing the carbon accumulated value with a preset carbon accumulated value to obtain a first comparison result;
comparing the coking value with a preset coking value to obtain a second comparison result;
acquiring engine electronic control unit parameters corresponding to self-learning of the engine, and comparing the electronic control unit parameters with preset electronic control unit parameters to obtain a third comparison result;
determining a reliability of the exhaust gas recirculation valve based on the first comparison, the second comparison, and the third comparison.
Optionally, after the step of determining the reliability of the exhaust gas recirculation valve according to the first comparison result, the second comparison result, and the third comparison result, the method further includes:
and outputting prompt information according to the reliability determination result of the exhaust gas recirculation valve.
Optionally, the step of outputting a prompt message according to the reliability determination result of the exhaust gas recirculation valve includes:
when any one of the first comparison result, the second comparison result and the third comparison result does not meet a preset condition, outputting first prompt information;
and outputting second prompt information when the first comparison result, the second comparison result and the third comparison result all meet preset conditions.
In addition, in order to achieve the above object, the present invention further provides a terminal device, which is characterized in that the terminal device comprises a memory, a processor and an exhaust gas recirculation valve reliability determination program stored in the memory and operable on the processor, and when the exhaust gas recirculation valve reliability determination program is executed by the processor, the method for determining the reliability of the exhaust gas recirculation valve as described above is implemented.
In addition, in order to achieve the above object, the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores an exhaust gas recirculation valve reliability determination program, and when the exhaust gas recirculation valve reliability determination program is executed by a processor, the method for determining the reliability of the exhaust gas recirculation valve as described above is implemented.
The reliability judgment method of the exhaust gas recirculation valve provided by the invention controls the engine to sequentially test in each test working condition by simulating each test working condition of the running of the whole vehicle, such as an idling working condition, an operation working condition and a shutdown working condition, wherein the engine self-learns the idling working condition and the operation working condition under the shutdown working condition, and after the engine test is finished, the reliability of the exhaust gas recirculation valve arranged on the engine is further judged according to the obtained self-learning data, the carbon accumulated value of the engine and the coking value of the engine, so that the reliability detection of the exhaust gas recirculation valve is realized, and the problem that the whole vehicle cannot normally work due to the low reliability of the exhaust gas recirculation valve is avoided.
Drawings
Fig. 1 is a block diagram of a terminal device according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a reliability test of the EGR valve according to the first embodiment of the method for determining reliability of the EGR valve of the present invention;
FIG. 3 is a schematic flow chart illustrating the process of comparing the results of the reliability determination of the EGR valve according to the second embodiment of the EGR valve reliability determination method of the present invention;
fig. 4 is a schematic flow chart illustrating the output prompt message of the second embodiment of the method for determining the reliability of the egr valve according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
The terminal device may be implemented in various forms. For example, the terminal device described in the present invention may be a test center control apparatus.
Referring to fig. 1, a block diagram of a terminal device according to an embodiment of the present invention, where the terminal device 100 includes: memory 101, processor 102, and display unit 103. Those skilled in the art will appreciate that the terminal device configuration shown in fig. 1 does not constitute a limitation of the terminal device, and that the terminal device may include more or fewer components than those shown, or may combine certain components, or may be arranged in different components.
The memory 101 stores a central control system and an exhaust gas recirculation valve reliability determination program. The processor 102 is a control center of the terminal device 100, and the processor 102 executes the egr valve reliability determination program stored in the memory 101 to realize the steps of the egr valve reliability determination method of the present invention.
The Display unit 103 includes a Display panel, which may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like, and may Display a prompt message, such as a first prompt message or a second prompt message, output according to a reliability determination result of the egr valve through the Display panel.
Referring to fig. 2, fig. 2 is a schematic flow chart illustrating a reliability test of the egr valve according to the first embodiment of the reliability determination method of the egr valve of the present invention. In this embodiment, the exhaust gas recirculation valve reliability determination method includes the steps of:
step S10, controlling the engine to test in sequence under various test working conditions, wherein the test working conditions comprise an operation working condition, an idling working condition and a stop working condition, and the engine self-learns under the stop working condition;
it should be noted that the test conditions include an operation condition, an idle condition, and a shutdown condition, wherein the operation condition includes, but is not limited to, a low-speed high-load condition and a high-speed high-load condition. The low-speed high-load working condition can simulate the working condition of large smoke intensity of the engine, so that the bare smoke intensity of the engine reaches the limit value, wherein the low-speed high-load working condition generally means that the rotating speed is 1000 revolutions, and the load is full accelerator. Under the high-speed high-load working condition, the engine reaches the specified maximum rotating speed under the condition of 100 percent of accelerator, so that the mechanical load and the thermal load of the engine reach the limit. The idle condition is an engine no-load operation state, i.e., the engine is operated in a neutral condition.
The engine is controlled to be tested in sequence under each test working condition, the setting modes of each test working condition are various, the running working condition, the idling working condition and the shutdown working condition can be set once respectively, and the test steps of each test working condition can be arranged and combined randomly; any working condition of the operation working condition, the idling working condition and the shutdown working condition can be repeatedly set, and the testing steps of all the testing working conditions can be randomly arranged and combined in the same way; the test steps of each test condition set in sequence can be used as a small cycle, and repeated tests can be performed according to the small cycle by presetting test duration.
Under the actual condition, when the vehicle runs under the urban working condition with lower temperature in winter, the exhaust gas recirculation valve of the engine can generate coking, clamping stagnation and self-learning faults, so that the exhaust gas recirculation valve cannot work normally. It can be understood that, in order to better simulate the scene that the whole vehicle operates under the urban working condition in winter, the engine is controlled to sequentially test under each test working condition, the idling working condition is operated after each operation working condition, and the shutdown working condition is operated after the idling working condition. In addition, the test duration of each test condition can be set before the test, and the test duration corresponding to each test condition can be set to be different durations or the same duration. It should be noted that the engine self-learns the opening of the current egr valve under the shutdown condition, that is, under the condition of shutdown of the engine, the engine self-learns the opening of the current egr valve, and during the self-learning process, the egr valve is finally in the closed state after going from the closed state to the open state, so as to self-learn the fully-closed position or the fully-open position of the current egr valve, wherein the fully-open position or the fully-closed position can be determined by obtaining the opening of the current egr valve, and for example, when the egr valve is in the fully-open position, the opening of the egr valve is 100%; the opening of the egr valve is 0 at the fully closed position of the egr valve.
It can be understood that before the engine is controlled to be tested under each test working condition in sequence, the engine for testing is required to be run-in advance, and all characteristics of the engine, such as smoke content, fuel consumption and the like, are measured, so that the engine for testing meets the test conditions, and the reliability of the test is further ensured.
To facilitate understanding of the above-described sequential testing of the engine under each test condition, the following description is provided for example, wherein the test sequence for each test condition is as follows:
a: operating the working condition, opening an exhaust gas recirculation valve on the engine, introducing the exhaust gas into the exhaust gas recirculation valve, and setting the test duration to be 360s, wherein the temperature of the exhaust gas is 280-330 ℃;
b, under an idling working condition, closing an exhaust gas recirculation valve on the engine, and setting the test duration to be 60 s;
c, operating the working condition, opening an exhaust gas recirculation valve on the engine, introducing the exhaust gas into the exhaust gas recirculation valve, and setting the test duration to be 360s, wherein the temperature of the exhaust gas is 280-330 ℃;
d, under the idling condition, closing an exhaust gas recirculation valve on the engine, and setting the test duration to be 60 s;
stopping the engine under the working condition, and self-learning an exhaust gas recirculation valve on the engine, wherein the test duration is 60 s;
the operation working condition, the low-speed high-load working condition simulates the working condition that the smoke intensity of the engine is large, an exhaust gas recirculation valve on the engine is opened, and the test duration is set to be 360 s;
g, under the idling condition, closing an exhaust gas recirculation valve on the engine, and setting the test duration to be 60 s;
h: the operation working condition, the low-speed high-load working condition simulates the working condition that the smoke intensity of the engine is large, an exhaust gas recirculation valve on the engine is opened, and the test duration is set to be 360 s;
the method comprises the following steps that I, an idling working condition is adopted, an exhaust gas recirculation valve on an engine is closed, and the test duration is set to be 60 s;
j: and (4) stopping the engine under the working condition, self-learning an exhaust gas recirculation valve on the engine, and testing the time length for 60 s.
The engine is tested in sequence according to the testing working conditions, the conversion time among the working conditions can be set to be completed at a time interval, for example, the conversion from the running working condition to the idling working condition is completed within 10s, and the conversion from the idling working condition to the shutdown working condition is completed within 10s, so that the rapid acceleration and deceleration condition of the whole vehicle is simulated, and the clamping stagnation fault of the exhaust gas recirculation valve caused by the abrasion of the exhaust gas recirculation valve is further accelerated. In addition, the test steps a to J may be regarded as a small-cycle test, and the engine may be configured to repeatedly perform the small-cycle test as a large-cycle, for example, if each small-cycle runs for 30min, 32 small-cycles run as a large-cycle, which is not limited in this embodiment.
It should be noted that, in the step A, C, it is simulated that when the entire vehicle runs in winter, the exhaust gas flowing through the exhaust gas circulation valve at a temperature of 280-330 ℃ is prone to cause coking of the exhaust gas circulation valve, and in the step F, H, it is simulated that the smoke intensity of the engine is large in the running process of the entire vehicle, that is, the particulate matters in the exhaust gas are more, and when the exhaust gas flows through the exhaust gas circulation valve, the exhaust gas circulation valve is prone to cause a stuck fault, so that the running condition in the actual process of the entire vehicle is simulated to improve the reliability of the reliability test of the exhaust.
Before the stop working condition, the engine closes or opens the exhaust gas recirculation valve in the test steps under the running working condition and the idling working condition in sequence, which may cause inaccurate positioning of the full-open position or the full-closed position of the exhaust gas recirculation valve, wherein the positioning of the position of the exhaust gas recirculation valve can pass through the opening of the exhaust gas recirculation valve, for example, when the full-open position of the exhaust gas recirculation valve is reached, the opening of the exhaust gas recirculation valve is 100%; when the exhaust gas recirculation valve is in the fully closed position, the opening degree of the exhaust gas recirculation valve is 0, the engine self-learns under the stop working condition, when the exhaust gas recirculation valve is in the self-learning process, the exhaust gas recirculation valve is in the closed state after being in the open state from the closed state, the current fully closed position of the exhaust gas recirculation valve is self-learned, and if the opening degree when the current exhaust gas recirculation valve is closed is not 0 or the opening degree when the current exhaust gas recirculation valve is opened does not meet 100%, the current valve position of the exhaust gas recirculation valve is not accurate, so that whether the position of the exhaust gas recirculation valve is accurate or not is judged by self-learning the fully closed position or the fully open position under the stop working condition.
Step S20, after the test is finished, acquiring self-learning data, the carbon accumulation value of the engine and the coking value of the engine;
and step S30, determining the reliability of an exhaust gas recirculation valve connected with the engine according to the self-learning data, the carbon accumulation value of the engine and the coking value of the engine.
After the test is completed, the self-learning data can be acquired by acquiring a shutdown working condition, after the exhaust gas recirculation valve is opened from a closed state, and finally when the exhaust gas recirculation valve is closed, the opening degree of the exhaust gas recirculation valve is closed or the opening degree of the exhaust gas recirculation valve is opened, the accumulated carbon value and the coking value of the engine can be analyzed by disassembling the exhaust gas recirculation valve of the engine, the accumulated carbon value of the exhaust gas recirculation valve can be obtained by weighing, the coking condition of the exhaust gas recirculation valve can be recorded by taking a picture, and the coking grade can be judged according to the coking condition, wherein the coking value can be the coking grade, and the specific implementation of the comparison step in the embodiment is not limited.
It should be noted that, the reliability of the exhaust gas recirculation valve on the engine is determined according to the self-learning data, the carbon accumulation value of the engine and the coking value of the engine, and the reliability of the exhaust gas recirculation valve is determined according to the comparison result by comparing the self-learning data, the carbon accumulation value of the engine and the coking value of the engine respectively corresponding to the preset learning value, the preset carbon accumulation value and the preset coking value.
In the technical scheme disclosed in this embodiment, the engine is controlled to sequentially test each test working condition by simulating each test working condition of the whole vehicle operation, such as an idling working condition, an operating working condition and a stopping working condition, wherein the engine self-learns the corresponding opening degree of the exhaust gas recirculation valve in a closing state or an opening state under the stopping working condition, and after the engine test is completed, the reliability of the exhaust gas recirculation valve arranged on the engine is further judged according to the obtained self-learning data, the carbon accumulated value of the engine and the coking value of the engine, so that the reliability detection of the exhaust gas recirculation valve is realized, the problem that the whole vehicle cannot normally work due to the low reliability of the exhaust gas recirculation valve is avoided, and a test environment is provided for checking and verifying the reliability of the exhaust gas recirculation valve.
Referring to fig. 3, fig. 3 is a schematic flow chart illustrating a method for determining reliability of an egr valve according to a second embodiment of the method for determining reliability of an egr valve according to the present invention. In this embodiment, step S30 includes:
step S31, comparing the carbon accumulation value with a preset carbon accumulation value to obtain a first comparison result;
step S32, comparing the coking value with a preset coking value to obtain a second comparison result;
step S33, obtaining engine electronic control unit parameters corresponding to the self-learning of the engine, and comparing the electronic control unit parameters with preset electronic control unit parameters to obtain a third comparison result;
step S34, determining reliability of the exhaust gas recirculation valve according to the first comparison result, the second comparison result and the third comparison result.
It should be noted that, after the electronic control unit parameter is self-learned by the engine, the evaluation value of whether the self-learning fault exists in the engine is determined by comparing the self-learning data with the preset target self-learning data, that is, the opening degree of the exhaust gas recirculation valve of the engine when closed or the opening degree of the exhaust gas recirculation valve when opened is respectively compared with the preset opening degree value to further evaluate whether the self-learning fault exists. It is understood that the preset carbon accumulation value, the preset coking value, and the preset electronic control unit parameter are calibration values for determining the reliability of the exhaust gas recirculation valve. Comparing the carbon accumulation value with a preset carbon accumulation value to obtain a first comparison result, namely the first comparison result has two conditions: the carbon accumulation value of an exhaust gas recirculation valve of the engine which is tested currently is smaller than a preset carbon accumulation value, or the carbon accumulation value of the exhaust gas recirculation valve is larger than or equal to the preset carbon accumulation value; similarly, there are two cases in the second comparison result obtained by comparing the coking value with the preset coking value: similarly, regarding the self-learning condition of evaluating the exhaust gas recirculation valve of the engine which is currently tested, two conditions of the obtained third comparison result are not described herein again.
It should be noted that, in the first comparison result, if the carbon integrated value of the exhaust gas recirculation valve is smaller than the preset carbon integrated value, it indicates that the reliability of the exhaust gas recirculation valve in the aspect of carbon integrated value is high, in the second comparison result, if the coking value of the exhaust gas recirculation valve is smaller than the preset coking value, it indicates that the reliability of the exhaust gas recirculation valve in the aspect of coking condition is high, and in the third comparison result, if the current engine electronic control unit parameter of the exhaust gas recirculation valve of the tested engine reaches the preset electronic control unit parameter, it indicates that the exhaust gas recirculation valve of the engine does not have self-learning obstacle. Determining the reliability of the exhaust gas recirculation valve based on the first comparison result, the second comparison result, and the third comparison result, wherein the reliability of the exhaust gas recirculation valve can be graded by determining the reliability of the exhaust gas recirculation valve in a carbon accumulation situation, a coking situation, and a self-learning situation, such as: when any one of the first comparison result, the second comparison result and the third comparison result does not meet the preset condition, the reliability of the exhaust gas recirculation valve is in a second level; when any two of the first comparison result, the second comparison result and the third comparison result do not meet the preset condition, the reliability of the exhaust gas recirculation valve is shown to be in a third level; when the first comparison result, the second comparison result and the third comparison result do not meet the preset condition, the reliability of the exhaust gas recirculation valve is shown to be in a fourth level; it can be understood that, when the first comparison result, the second comparison result, and the third comparison result all satisfy the preset condition, that is, when the carbon accumulation value of the exhaust gas recirculation valve is smaller than the preset carbon accumulation value, the coking value of the exhaust gas recirculation valve is smaller than the preset coking value, and the current engine electronic control unit parameter of the exhaust gas recirculation valve reaches the preset electronic control unit parameter, it indicates that the reliability of the exhaust gas recirculation valve is at the first level. Wherein a lower level of reliability of the EGR valve indicates a higher reliability of the EGR valve. Optionally, step S34 is followed by: and outputting prompt information according to the reliability determination result of the exhaust gas recirculation valve. The prompt message comprises at least one of voice prompt message, text prompt message and vibration prompt message. It can be understood that when the first comparison result, the second comparison result and the third comparison result all meet the preset condition, the reliable prompt message of the exhaust gas recirculation valve can be output; when any one of the first comparison result, the second comparison result and the third comparison result does not meet the preset condition, prompt information that the exhaust gas recirculation valve is unreliable can be output; or after the reliability of the exhaust gas recirculation valve is graded, the reliability grade of the exhaust gas recirculation valve can be output according to the reliability grade determined by the exhaust gas recirculation valve under the conditions of carbon accumulation, coking and self-learning, wherein the lower the reliability grade of the exhaust gas recirculation valve is, the higher the reliability of the exhaust gas recirculation valve is, and the specific implementation of the step is not limited in the implementation.
In addition, referring to fig. 4, fig. 4 is a schematic flow chart of the method for determining the reliability of the egr valve according to the second embodiment of the present invention, where the step of outputting the prompt information according to the reliability determination result of the egr valve includes the following steps:
step S51, outputting a first prompt message when any one of the first comparison result, the second comparison result and the third comparison result does not meet a preset condition;
and step S52, outputting a second prompt message when the first comparison result, the second comparison result and the third comparison result all meet preset conditions.
In the technical scheme disclosed in the embodiment, a first comparison result is obtained through a carbon accumulation condition of an exhaust gas recirculation valve of an engine which is tested, a second comparison result is obtained through a coking condition of the exhaust gas recirculation valve, a third comparison result is obtained through a self-learning condition of the exhaust gas recirculation valve, the reliability of the exhaust gas recirculation valve is determined according to the first comparison result, the second comparison result and the third comparison result, prompt information is correspondingly output according to different conditions, for example, when any one of the first comparison result, the second comparison result and the third comparison result does not meet a preset condition, the first prompt information is output, the reliability of the exhaust gas recirculation valve in the carbon accumulation condition, the coking condition or the self-learning condition can be known in a targeted manner, and in addition, when the first comparison result, the second comparison result and the third comparison result all meet the preset condition, and outputting second prompt information to directly know whether the exhaust gas recirculation valve is reliable or not.
The present invention also provides a terminal device, which includes: the system comprises a memory, a processor and an exhaust gas recirculation valve reliability judging program stored in the memory and capable of running on the processor, wherein the exhaust gas recirculation valve reliability judging program is executed by the processor to realize the steps of the exhaust gas recirculation valve reliability judging method in any one of the embodiments.
The present invention further provides a computer-readable storage medium, wherein an exhaust gas recirculation valve reliability determination program is stored on the computer-readable storage medium, and when executed by the processor, the method for determining the reliability of the exhaust gas recirculation valve according to any of the above embodiments is implemented.
In the embodiments of the terminal device and the computer-readable storage medium provided by the present invention, all technical features of the embodiments of the method for determining the reliability of the exhaust gas recirculation valve are included, and the contents of the expansion and the explanation of the specification are substantially the same as those of the embodiments of the method for determining the reliability of the exhaust gas recirculation valve, and are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, a controlled terminal, or a network device) to execute the method of each embodiment of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A method for determining reliability of an exhaust gas recirculation valve, comprising:
controlling an engine to test in sequence under various test working conditions, wherein the test working conditions comprise an operation working condition, an idling working condition and a shutdown working condition, and the engine self-learns under the shutdown working condition;
after the test is finished, acquiring self-learning data, a carbon accumulation value of the engine and a coking value of the engine;
determining the reliability of an exhaust gas recirculation valve connected to an engine based on the self-learning data, the carbon accumulation value of the engine, and the coking value of the engine.
2. The exhaust gas recirculation valve reliability determination method of claim 1, wherein the idle condition is operated after each of the operating conditions.
3. The exhaust gas recirculation valve reliability determination method of claim 2, wherein the shutdown condition is operated after the idle condition.
4. The method of determining the reliability of an exhaust gas recirculation valve according to claim 1, wherein the test duration varies for each of the test operating conditions.
5. The exhaust gas recirculation valve reliability determination method of claim 1, wherein the step of determining the reliability of an exhaust gas recirculation valve coupled to an engine based on the self-learning data, the carbon accumulation value of the engine, and the coking value of the engine comprises:
comparing the carbon accumulated value with a preset carbon accumulated value to obtain a first comparison result;
comparing the coking value with a preset coking value to obtain a second comparison result;
acquiring engine electronic control unit parameters corresponding to self-learning of the engine, and comparing the electronic control unit parameters with preset electronic control unit parameters to obtain a third comparison result;
determining a reliability of the exhaust gas recirculation valve based on the first comparison, the second comparison, and the third comparison.
6. The exhaust gas recirculation valve reliability determination method of claim 5, wherein after the step of determining the reliability of the exhaust gas recirculation valve based on the first comparison result, the second comparison result, and the third comparison result, the exhaust gas recirculation valve reliability determination method further comprises:
and outputting prompt information according to the reliability determination result of the exhaust gas recirculation valve.
7. The exhaust gas recirculation valve reliability determination method of claim 6, wherein the step of outputting a prompt message based on the reliability determination of the exhaust gas recirculation valve comprises:
when any one of the first comparison result, the second comparison result and the third comparison result does not meet a preset condition, outputting first prompt information;
and outputting second prompt information when the first comparison result, the second comparison result and the third comparison result all meet preset conditions.
8. A terminal device, characterized in that the terminal device comprises: a memory, a processor, and an EGR valve reliability determination program stored in the memory and executable on the processor, the EGR valve reliability determination program when executed by the processor implementing the steps of the EGR valve reliability determination method of any of claims 1-7.
9. A computer-readable storage medium, wherein the computer-readable storage medium has an exhaust gas recirculation valve reliability determination program stored thereon, which when executed by a processor, performs the steps of the exhaust gas recirculation valve reliability determination method of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911219167.6A CN110873645A (en) | 2019-11-28 | 2019-11-28 | Exhaust gas recirculation valve reliability judgment method and device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911219167.6A CN110873645A (en) | 2019-11-28 | 2019-11-28 | Exhaust gas recirculation valve reliability judgment method and device and storage medium |
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| CN104929784A (en) * | 2015-06-08 | 2015-09-23 | 潍柴动力股份有限公司 | EGR valve self-learning method |
| CN105649788A (en) * | 2014-11-10 | 2016-06-08 | 联创汽车电子有限公司 | Dead-center position self-learning method of exhaust gas recirculation valve |
| CN108644024A (en) * | 2018-04-27 | 2018-10-12 | 安徽江淮汽车集团股份有限公司 | A kind of control method of diesel engine EGR valve |
| CN110274767A (en) * | 2019-06-28 | 2019-09-24 | 安徽江淮汽车集团股份有限公司 | System reliability judgment method, device, equipment and storage medium |
| CN110284978A (en) * | 2019-06-21 | 2019-09-27 | 安徽航瑞航空动力装备有限公司 | EGR valve self-learning method based on unilateral driving |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105649788A (en) * | 2014-11-10 | 2016-06-08 | 联创汽车电子有限公司 | Dead-center position self-learning method of exhaust gas recirculation valve |
| CN104929784A (en) * | 2015-06-08 | 2015-09-23 | 潍柴动力股份有限公司 | EGR valve self-learning method |
| CN108644024A (en) * | 2018-04-27 | 2018-10-12 | 安徽江淮汽车集团股份有限公司 | A kind of control method of diesel engine EGR valve |
| CN110284978A (en) * | 2019-06-21 | 2019-09-27 | 安徽航瑞航空动力装备有限公司 | EGR valve self-learning method based on unilateral driving |
| CN110274767A (en) * | 2019-06-28 | 2019-09-24 | 安徽江淮汽车集团股份有限公司 | System reliability judgment method, device, equipment and storage medium |
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