CN110219744B - Electronic throttle failure solving method, device, system and storage medium - Google Patents
Electronic throttle failure solving method, device, system and storage medium Download PDFInfo
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- CN110219744B CN110219744B CN201910494804.4A CN201910494804A CN110219744B CN 110219744 B CN110219744 B CN 110219744B CN 201910494804 A CN201910494804 A CN 201910494804A CN 110219744 B CN110219744 B CN 110219744B
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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
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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
- Y02T10/40—Engine management systems
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Abstract
The invention discloses a method, a device, a system and a storage medium for solving the fault of an electronic throttle valve, wherein the method comprises the following steps: acquiring an initial deviation distance between the current position of the electronic throttle valve and a preset standard position; judging whether the initial deviation distance exceeds a preset deviation threshold value or not, if so, carrying out valve flushing operation on the electronic throttle valve and obtaining the actual deviation distance between the electronic throttle valve and a preset standard position when the valve flushing operation is finished; and if the actual deviation distance does not exceed the preset deviation threshold value, judging that the electronic throttle valve has no fault. Because the electronic throttle valve is subjected to valve flushing operation when the deviation distance between the current position of the electronic throttle valve and the standard position exceeds the deviation threshold value, whether the actual deviation distance between the electronic throttle valve and the standard position after the valve flushing operation exceeds the preset deviation threshold value is detected, and if the actual deviation distance between the electronic throttle valve and the standard position does not exceed the preset deviation threshold value, the electronic throttle valve does not have jamming faults, the problem of jamming of the electronic throttle valve can be timely and effectively detected and solved, and the driving experience is improved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a method, a device and a system for solving a fault of an electronic throttle valve and a storage medium.
Background
Environmental protection is one of the important problems facing human beings in modern life. With the rapid development of economy, automobiles have gone into thousands of households to become the current mainstream travel mode, and meanwhile, the problem of automobile exhaust emission is more and more concerned by the public.
With the upgrading of emission requirements, the electronic nodular valve is widely applied to internal combustion engines such as diesel engines and gasoline engines. The diesel throttle is generally arranged in front of an Exhaust Gas Recirculation (EGR) outlet, so that Exhaust Gas from the EGR is cooled and condensed into liquid drops to flow back to the position of the electronic throttle, but the electronic throttle is prone to being stuck due to long-time Exhaust Gas circulation. Therefore, how to effectively prevent the electronic throttle valve from being stuck becomes a problem to be solved urgently.
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, a device and a system for solving the fault of an electronic throttle valve and a storage medium, and aims to solve the technical problem that the prior art cannot effectively solve the clamping stagnation of the electronic throttle valve.
In order to achieve the above object, the present invention provides a method for solving a failure of an electronic throttle, the method comprising the steps of:
acquiring an initial deviation distance between the current position of the electronic throttle valve and a preset standard position;
judging whether the initial deviation distance exceeds a preset deviation threshold value, and if so, carrying out valve flushing operation on the electronic throttle valve according to a preset duty ratio;
acquiring an actual deviation distance between the electronic throttle valve and the preset standard position when the valve flushing operation is finished;
and when the actual deviation distance is detected not to exceed the preset deviation threshold value, determining that the electronic throttle valve has no fault.
Preferably, before the step of determining that the operation of the flush valve is successful when the actual deviation distance is detected not to exceed the preset deviation threshold, the method further comprises:
comparing the actual deviation distance to the initial deviation distance;
and if the actual deviation distance is smaller than the initial deviation distance, determining that the electronic throttle valve is in a moving state, and detecting whether the actual deviation distance exceeds the preset deviation threshold value.
Preferably, after the step of detecting whether the actual deviation distance exceeds the preset deviation threshold, the method further comprises:
if the actual deviation distance exceeds the preset deviation threshold value, carrying out the valve flushing operation on the electronic throttle valve for a first preset number of times;
acquiring a deviation distance between the electronic throttle valve and the preset standard position at the end of each valve flushing operation, and comparing the acquired deviation distance with the preset deviation threshold value;
and if the deviation distance obtained each time exceeds the preset deviation threshold value, judging that the electronic throttle valve has a fault.
Preferably, after the step of comparing the actual deviation distance with the initial deviation distance, the method further comprises:
if the actual deviation distance is equal to the initial deviation distance, determining that the electronic throttle valve is in a non-moving state;
when the electronic throttle valve is in a non-moving state, performing the valve flushing operation on the electronic throttle valve for a second preset number of times;
acquiring a deviation distance between the electronic throttle valve and the preset standard position when each valve flushing operation is finished, and comparing the acquired deviation distance with the initial deviation distance;
and if the obtained deviation distance is equal to the initial deviation distance each time, judging that the electronic throttle valve has a fault.
Preferably, before the step of obtaining the initial deviation distance between the current position of the electronic throttle valve and the preset standard position, the method further comprises:
acquiring the current power supply voltage of an electronic control unit corresponding to an electronic throttle valve and the current air inlet temperature corresponding to the electronic throttle valve;
detecting whether the current air inlet temperature and the current power supply voltage both meet a preset self-cleaning condition;
if so, carrying out carbon deposition removing operation on the electronic throttle valve, wherein the carbon deposition removing operation comprises carbon deposition self-cleaning operation and deviation correcting operation after the carbon deposition self-cleaning operation is finished;
acquiring a deviation value between the electronic throttle valve and the preset standard position when the deviation correction operation is finished;
judging whether the deviation value exceeds the preset deviation threshold value or not;
and when the deviation value does not exceed the preset deviation threshold value, judging that the carbon deposition removal is successful.
Preferably, the step of detecting whether the current intake temperature and the current power supply voltage both satisfy a preset self-cleaning condition includes:
detecting whether the current air inlet temperature is in a preset temperature range or not and whether the current power supply voltage is higher than a preset voltage value or not;
and if the current air inlet temperature is within the preset temperature range and the current power supply voltage is higher than the preset voltage value, judging that the preset self-cleaning condition is met.
Preferably, after the step of determining whether the deviation value exceeds the preset deviation threshold, the method further includes:
when the deviation value exceeds the preset deviation threshold value, performing the carbon deposition removing operation on the electronic throttle valve for a third preset number of times;
acquiring a deviation value between the electronic throttle valve and the preset standard position when the carbon deposition removing operation is finished each time, and comparing the acquired deviation value with the preset deviation threshold value;
and if the deviation value obtained each time exceeds the preset deviation threshold value, judging that the electronic throttle valve has a fault.
In addition, in order to achieve the above object, the present invention also provides an electronic throttle failure solving device, including:
the distance acquisition module is used for acquiring an initial deviation distance between the current position of the electronic throttle valve and a preset standard position;
the threshold value judging module is used for judging whether the initial deviation distance exceeds a preset deviation threshold value or not, and if so, carrying out valve flushing operation on the electronic throttle valve according to a preset duty ratio;
the distance acquisition module is further used for acquiring an actual deviation distance between the electronic throttle valve and the preset standard position when the valve flushing operation is finished;
and the fault judgment module is used for judging that the electronic throttle valve has no fault when the actual deviation distance is detected to be not more than the preset deviation threshold value.
In addition, to achieve the above object, the present invention also provides an electronic throttle failure solving system, including: an electronic control unit, an engine, an electronic throttle valve, an exhaust gas recirculation cooler, an exhaust gas recirculation valve, and an electronic throttle valve malfunction solving program stored on and operable on the electronic control unit, the electronic throttle valve malfunction solving program configured to implement the steps of the electronic throttle valve malfunction solving method as described above.
Further, to achieve the above object, the present invention also proposes a storage medium having stored thereon an electronic throttle failure solving program which, when executed by a processor, realizes the steps of the electronic throttle failure solving method as described above.
The method comprises the steps of obtaining an initial deviation distance between the current position of the electronic throttle valve and a preset standard position; judging whether the initial deviation distance exceeds a preset deviation threshold value, and if so, carrying out valve flushing operation on the electronic throttle valve according to a preset duty ratio; acquiring an actual deviation distance between the electronic throttle valve and a preset standard position when the valve flushing operation is finished; when the fact that the actual deviation distance does not exceed the preset deviation threshold value is detected, the electronic throttle valve is judged to be free of faults, the fact that whether the deviation distance between the current position of the electronic throttle valve and the standard position exceeds the preset deviation threshold value or not is detected, the electronic throttle valve is subjected to valve flushing operation when the deviation distance exceeds the preset deviation threshold value, then whether the actual deviation distance between the electronic throttle valve and the standard position after the valve flushing operation does not exceed the preset deviation threshold value or not is detected, if the actual deviation distance does not exceed the preset deviation threshold value, the valve flushing success is indicated, the electronic throttle valve is free of clamping stagnation faults, therefore, the problem of clamping stagnation of the electronic throttle.
Drawings
FIG. 1 is a schematic structural diagram of an electronic throttle failure resolution system for a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of the electronic throttle failure solution method of the present invention;
FIG. 3 is a schematic flow chart of a second embodiment of the electronic throttle failure solution of the present invention;
FIG. 4 is a schematic flow chart of a fault resolution method for an electronic throttle valve according to a third embodiment of the present invention;
fig. 5 is a block diagram showing the construction of the first embodiment of the electronic throttle failure solving apparatus of the 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.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic throttle failure solving system in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the electronic throttle failure solving system may include: an Electronic Control Unit (ECU) (not shown), an engine 1001 (e.g., a diesel engine, a gasoline engine, etc.), an Electronic throttle valve 1002, an EGR cooler 1003, an EGR valve 1004, and an EGR exhaust gas outlet. The electronic control unit has data processing, network communication and program running functions, and can control electronic devices connected with the electronic throttle failure solving system (including wired connection and wireless connection); EGR valve 1004 has one end connected to engine 1001 and the other end connected to EGR cooler 1003; the other end of the EGR cooler 1003 is an EGR waste gas outlet, and the electronic throttle 1002 is arranged in front of the EGR waste gas outlet; the EGR exhaust outlet is on the line between electronic throttle 1002 and engine 1001.
Those skilled in the art will appreciate that the configuration shown in FIG. 1 does not constitute a limitation of an electronic throttle failure resolution system, and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
In the electronic throttle failure solving system shown in fig. 1, the electronic throttle failure solving system calls an electronic throttle failure solving program stored on an electronic control unit through the electronic control unit and executes an electronic throttle failure solving method provided by an embodiment of the invention.
An embodiment of the present invention provides a method for solving a fault of an electronic throttle, and referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the method for solving the fault of the electronic throttle according to the present invention.
In this embodiment, the electronic throttle failure solution method includes the following steps:
step S10: acquiring an initial deviation distance between the current position of the electronic throttle valve and a preset standard position;
it should be noted that the main body of the method of the present embodiment may be an Electronic Control Unit (ECU), and the ECU generally has functions of fault self-diagnosis and protection. When the system fails, it can automatically record the fault code in Random Access Memory (RAM) and take protection measures to read the substitute program from the intrinsic program to maintain the operation of the engine and other components.
It should be understood that the preset standard position is a position at which the electronic throttle valve is in a normal state. In this embodiment, the initial deviation distance may be represented by an opening degree of the electronic throttle valve, that is, an opening angle of the electronic throttle valve plate.
In a specific implementation, after the automobile is started, the electronic control unit first obtains a current position of the electronic throttle valve, and then calculates a distance between the current position and a preset standard position, namely the initial deviation distance.
Step S20: judging whether the initial deviation distance exceeds a preset deviation threshold value, and if so, carrying out valve flushing operation on the electronic throttle valve according to a preset duty ratio;
it should be noted that the preset deviation threshold may be an allowable error value set based on the preset standard position, that is, if the distance between the current position of the electronic throttle and the preset standard position is less than or equal to the deviation threshold, it is determined that the current position of the electronic throttle is normal, and the valve plate position adjustment is not required through the valve-punching operation; otherwise, the valve sheet position adjustment is required by the valve-punching operation.
It can be understood that the valve punching operation, namely the action of driving the valve plate to move with a larger duty ratio when the electronic throttle valve has a clamping tendency. By duty cycle is meant the percentage of time that the circuit is turned on for the entire circuit duty cycle. For example, if a circuit (or electronic component) is turned on (energized) half of the time in a duty cycle, then its duty cycle is 50%. Assuming that the electronic component is an electronic valve, when the circuit is on, the valve is fully open; when the duty cycle is 50%, the valve state is half-open. Similarly, when the duty ratio is set to 20%, the opening of the valve should obviously be 20%. Thus, the valve can be adjusted freely in the range of 0% (fully closed) to 100% (fully open) by controlling the duty ratio. The preset duty cycle in this scheme may be set to 100% or-100%.
In a specific implementation, the electronic control unit indicates that valve sheet position adjustment needs to be performed through the valve punching operation when judging that the initial deviation distance exceeds the preset deviation threshold. Specifically, the electronic control unit may perform the flushing operation in the reverse direction of the initial deviation distance of the electronic throttle valve according to a preset duty ratio, for example, with the position of the valve plate when the valve plate is normally closed as a reference point, the deviation distance of clockwise rotation is positive, the deviation of counterclockwise rotation is negative, when the deviation distance is positive, the flushing operation needs to be performed in the reverse direction (counterclockwise), and when the deviation distance is negative, the flushing operation needs to be performed in the reverse direction (clockwise).
Step S30: acquiring an actual deviation distance between the electronic throttle valve and the preset standard position when the valve flushing operation is finished;
it should be noted that the actual deviation distance is a deviation distance between the electronic throttle valve plate and the preset standard position at the end of the valve flushing operation.
It is understood that the operation of the flush valve may affect the drivability to some extent, and therefore it is necessary to accurately determine whether there is a stuck condition of the electronic throttle of the automobile with as few flush valve operations as possible. Different from the electronic throttle valve clamping stagnation detection strategy of fixedly performing three wheels in each driving cycle and performing five times of valve punching operations in each wheel in the prior art, the electronic throttle valve clamping stagnation detection strategy of the embodiment firstly performs one valve punching operation and then judges whether the electronic throttle valve of the automobile is clamped or not according to the result of the valve punching operation.
In a specific implementation, after the electronic throttle valve is subjected to the valve flushing operation, the electronic control unit further obtains an actual deviation distance between the electronic throttle valve and a preset standard position when the valve flushing operation is finished, so that whether the valve flushing is successful is judged according to the actual deviation distance after the valve flushing operation, if the valve flushing is successful, the electronic throttle valve is not blocked, and if the valve flushing is failed, the electronic throttle valve is possibly blocked, and further confirmation is needed.
Step S40: and when the actual deviation distance is detected not to exceed the preset deviation threshold value, determining that the electronic throttle valve has no fault.
It should be noted that, before step S40, the electronic control unit compares the actual deviation distance with the initial deviation distance, and if it is detected that the actual deviation distance is smaller than the initial deviation distance according to the comparison result, it may be determined that the electronic throttle is in the moving state, but the moving state does not represent that the electronic throttle has moved to the normal position (i.e., the preset standard position), so the electronic control unit will further detect whether the actual deviation distance exceeds the preset deviation threshold, and if it is detected that the actual deviation distance does not exceed the preset deviation threshold, it may immediately determine that the electronic throttle does not have the stuck fault.
In a specific implementation, when the actual deviation distance after the operation of the flushing valve is detected to be not more than the preset deviation threshold value, the electronic control unit can determine that the electronic throttle valve has no jamming fault.
In the embodiment, the initial deviation distance between the current position of the electronic throttle valve and the preset standard position is obtained; judging whether the initial deviation distance exceeds a preset deviation threshold value, and if so, carrying out valve flushing operation on the electronic throttle valve according to a preset duty ratio; acquiring an actual deviation distance between the electronic throttle valve and a preset standard position when the valve flushing operation is finished; when the fact that the actual deviation distance does not exceed the preset deviation threshold value is detected, the electronic throttle valve is judged to be free of faults, the fact that whether the deviation distance between the current position of the electronic throttle valve and the standard position exceeds the preset deviation threshold value or not is detected, the electronic throttle valve is subjected to valve flushing operation when the deviation distance exceeds the preset deviation threshold value, then whether the actual deviation distance between the electronic throttle valve and the standard position after the valve flushing operation does not exceed the preset deviation threshold value or not is detected, if the actual deviation distance does not exceed the preset deviation threshold value, the valve flushing success is indicated, the electronic throttle valve is free of clamping stagnation faults, therefore, the problem of clamping stagnation of the electronic throttle.
Referring to fig. 3, fig. 3 is a schematic flow chart of the electronic throttle failure solving method according to the second embodiment of the invention.
Based on the first embodiment described above, in the present embodiment, after the electronic control unit compares the actual deviation distance obtained after the first flushing operation with the initial deviation distance, the electronic throttle failure solving method further includes:
step S301: if the actual deviation distance exceeds the preset deviation threshold value, carrying out the valve flushing operation on the electronic throttle valve for a first preset number of times;
it should be understood that if the actual deviation distance is detected to exceed the preset deviation threshold after the first flushing operation, it indicates that the first flushing operation is not enough to move the electronic throttle valve to the preset standard position, and two or more flushing operations are required.
The first preset number is preferably three times in the present embodiment, considering that the operation of the flush valve may affect the drivability to some extent.
In a specific implementation, if the electronic control unit detects that the actual deviation distance exceeds the preset deviation threshold, the electronic throttle valve will be subjected to the first preset number of valve flushing operations.
Step S302: acquiring a deviation distance between the electronic throttle valve and the preset standard position at the end of each valve flushing operation, and comparing the acquired deviation distance with the preset deviation threshold value;
in this embodiment, after each time of the valve flushing operation, the electronic control unit acquires a deviation distance between the electronic throttle valve and the preset standard position, and then compares the acquired deviation distance with the preset deviation distance to determine whether the valve plate of the electronic throttle valve moves to the preset standard position according to the comparison result.
Step S303: if the deviation distance obtained each time exceeds the preset deviation threshold value, judging that the electronic throttle valve has a fault;
in a specific implementation, if the electronic control unit detects that the deviation distance is less than or equal to (i.e. does not exceed) the preset deviation threshold after the first preset number of times of the valve flushing operations, the valve flushing success is indicated, and otherwise, the electronic throttle valve is indicated to have a fault.
Further, in the present embodiment, after the step of comparing the actual deviation distance obtained after the first time of the valve-flushing operation with the initial deviation distance by the electronic control unit, the electronic throttle failure solving method of the present embodiment further includes:
step S304: if the actual deviation distance is equal to the initial deviation distance, determining that the electronic throttle valve is in a non-moving state;
it should be understood that if the electronic control unit detects that the actual deviation distance obtained after the first flushing operation is equal to the initial deviation distance, it indicates that the electronic throttle valve is hardly moved at the end of the first flushing operation, i.e., is in a non-moving state or a non-moving state.
Of course, in this embodiment, the actual deviation distance is equal to the initial deviation distance, but it is not strictly necessary that the actual deviation distance and the initial deviation distance are equal, and they may be in a relationship of approximately equal, that is, the actual deviation distance is considered to be "equal to" the initial deviation distance as long as the absolute value of the difference between the actual deviation distance and the initial deviation distance belongs to a calibrated range (e.g. 0-1).
In a specific implementation, if the electronic control unit detects that the actual deviation distance after the first valve-flushing operation is equal to the initial deviation distance, it is determined that the electronic throttle valve is in the non-moving state.
Step S305: when the electronic throttle valve is in a non-moving state, performing the valve flushing operation on the electronic throttle valve for a second preset number of times;
it should be noted that, in this embodiment, the second preset number of times may be set according to an actual situation. Similarly, the second preset number is preferably 5 times in the embodiment, considering that the driving performance is affected by the valve-flushing operation, but when the electronic throttle is in the non-moving state, the problem of electronic throttle sticking may not be solved effectively due to too few valve-flushing times. In this example 5 flush valve operations are one round, requiring 3 rounds per driving cycle.
In a specific implementation, when the electronic throttle valve is in a non-moving state, the electronic control unit performs a second preset number of valve flushing operations on the electronic throttle valve.
Step S306: acquiring a deviation distance between the electronic throttle valve and the preset standard position at the end of each valve flushing operation, and comparing the acquired deviation distance with the initial deviation distance;
in a specific implementation, the electronic control unit acquires a deviation distance between the electronic throttle valve and a preset standard position at the end of each valve flushing operation, and then compares the acquired deviation distance with an initial deviation distance to detect whether the electronic throttle valve is still in a non-moving state.
Step S307: and if the obtained deviation distance is equal to the initial deviation distance each time, judging that the electronic throttle valve has a fault.
In a specific implementation, if the deviation distance obtained by the electronic control unit every time is equal to the initial deviation distance in the process of executing the valve-flushing operation for the second preset number of times, it is determined that the electronic throttle valve has the clamping stagnation fault.
When the actual deviation distance is detected to exceed the preset deviation threshold value, the electronic throttle valve is subjected to valve flushing operation for a first preset number of times; acquiring a deviation distance between the electronic throttle valve and a preset standard position when each valve flushing operation is finished, and comparing the acquired deviation distance with a preset deviation threshold value; if the deviation distance obtained each time exceeds the preset deviation threshold value, the electronic throttle valve is judged to have a fault, and compared with the existing electronic throttle valve clamping stagnation detection strategy, the method and the device can reduce the operation of the flushing valve while ensuring the accuracy of the fault detection result, and improve the driving performance of the automobile. Meanwhile, the present embodiment determines that the electronic throttle is in the non-moving state when it is detected that the actual deviation distance is equal to the initial deviation distance; when the electronic throttle valve is in a non-moving state, carrying out second preset times of valve flushing operation on the electronic throttle valve; acquiring a deviation distance between the electronic throttle valve and a preset standard position when each valve flushing operation is finished, and comparing the acquired deviation distance with an initial deviation distance; if the deviation distance obtained each time is equal to the initial deviation distance, the electronic throttle valve is judged to have a fault, and then whether the electronic throttle valve has the fault or not can be determined through multiple valve flushing operations when the electronic throttle valve is judged to be in a non-moving state, so that the accuracy of a fault detection result is improved.
Referring to fig. 4, fig. 4 is a schematic flow chart of the electronic throttle failure solving method according to the third embodiment of the invention.
Based on the foregoing embodiments, in this embodiment, before the step S10, the method further includes:
step S01: acquiring the current power supply voltage of an electronic control unit corresponding to an electronic throttle valve and the current air inlet temperature corresponding to the electronic throttle valve;
it should be understood that, in practical situations, the electronic throttle sticking of the automobile may be caused by impurities such as carbon deposition attached to the valve sheet. Therefore, the electronic throttle failure solving method further solves the problem of electronic throttle jamming by carrying out carbon deposit clearing operation.
It can be understood that the operation of removing the carbon deposit is not convenient to be carried out when the automobile runs, and the electronic control unit of the embodiment can remove the carbon deposit after the automobile key is powered off.
In the specific implementation, the electronic control unit is powered off under an automobile key, acquires the current air inlet temperature corresponding to the electronic throttle valve through the temperature sensor, and acquires the power supply voltage of the electronic throttle valve at the current moment.
Step S02: detecting whether the current air inlet temperature and the current power supply voltage both meet a preset self-cleaning condition;
it should be noted that, in this embodiment, the preset self-cleaning condition is that after the key of the vehicle is powered off (off), the intake air temperature of the electronic throttle valve is within a preset temperature range (i.e., between 0 ° and 110 °), and the ECU power supply voltage is greater than 10V. Of course, this embodiment requires that the vehicle key be powered down for at least 500 milliseconds before the carbon purge operation can be performed.
In a specific implementation, the electronic control unit will detect whether the current intake air temperature is within a preset temperature range and whether the current supply voltage is higher than a preset voltage value; and if the current air inlet temperature is within a preset temperature range and the current power supply voltage is higher than a preset voltage value, judging that the preset self-cleaning condition is met.
Step S03: if so, carrying out carbon deposition removing operation on the electronic throttle valve, wherein the carbon deposition removing operation comprises carbon deposition self-cleaning operation and deviation correcting operation after the carbon deposition self-cleaning operation is finished;
it should be noted that the soot self-cleaning operation in this embodiment can remove the soot to some extent. The carbon deposition self-cleaning operation specifically comprises the following steps: the electronic control unit controls the valve plate of the electronic throttle valve to rotate to 95% of the position in a closed-loop manner, and keeps the valve plate not to move at the position for 400 milliseconds; then the closed-loop control valve plate rotates to a 5% position, the valve plate is kept not to move at the position for 400 milliseconds, and finally the closed-loop control valve plate rotates to a 95% position; the above process is repeated a given number of times (e.g., 8 times), and the entire repetition process needs to be completed within 15 seconds. In this embodiment, the valve plate is defined as being fully closed at 0% position (bottom dead center), and the valve plate is defined as being fully opened at 100% position (top dead center).
In addition, in this embodiment, the operation of correcting the deviation after the operation of self-cleaning the carbon deposition is finished may be referred to as a self-learning process of correcting the deviation, and the specific self-learning process includes: after the above-mentioned soot self-cleaning operation is finished for a certain period of time (for example, 0.5 seconds), the electronic control unit controls the throttle position to 0% position in a closed loop (the process must be completed within 1.5 seconds, otherwise enters a Pulse Width Modulation (PWM) direct control stage, the closed loop control follows soft landing), then changes the current PWM to 30% PWM at a rate of 100%/s, and maintains the PWM for 0.5 seconds, and reads 5 times position signal values and averages (at this time, under the 30% PWM control, each reading is 20ms apart). After the self-learning operation corresponding to the bottom dead center is completed, the electronic control unit controls the position of the electronic throttle valve to be 100% in a closed loop mode (the same process needs to be completed within 1.5 seconds, otherwise, the PWM direct control stage is started), then the current PWM is skipped to-10% PWM, the PWM is maintained for 0.5 second, and after the process is finished, the position signal value is read for 5 times and averaged (at the moment, under the control of-10% PWM, each reading is separated by 20 ms). Furthermore, the self-learning process described above must be completed within 9 seconds, otherwise the self-learning will be interrupted.
In a specific implementation, the electronic control unit performs the carbon deposit removal operation on the electronic throttle valve when detecting that a preset self-cleaning condition is met.
Step S04: acquiring a deviation value between the electronic throttle valve and the preset standard position when the deviation correction operation is finished;
it should be noted that, after the self-learning process of the present embodiment is completed, the electronic control unit will also perform the verification of the short-term deviation and the long-term deviation.
And detecting whether the difference value is within an allowable error range after the short-term deviation means that the position of the valve plate of the electronic throttle valve after the self-learning process is finished each time is different from the position of the valve plate after the last self-learning process is finished, and if so, judging that the self-learning is successful and the valve plate is in a normal position. Similarly, after the long-term deviation means that the position of the valve plate of the electronic throttle valve after the self-learning process is finished each time is different from the position of the valve plate after the first self-learning process is finished, whether the difference is within an allowable error range is detected, if yes, the self-learning is judged to be successful, and otherwise, the fault is judged.
In a specific implementation, the electronic control unit obtains a deviation value between the current position of the electronic throttle valve and the preset standard position when a deviation correction operation (i.e. the self-learning process) is finished.
Step S05: judging whether the deviation value exceeds the preset deviation threshold value or not;
in a specific implementation, after obtaining a deviation value between the electronic throttle valve and a preset standard position, the electronic control unit further determines whether the deviation value exceeds a preset deviation threshold, that is, whether a distance between the valve plate and the preset standard position is within an allowable error range is detected.
Step S06: and when the deviation value does not exceed the preset deviation threshold value, judging that the carbon deposition removal is successful.
In a specific implementation, the electronic control unit can judge that the carbon deposition removal operation is successful when detecting that the deviation value does not exceed a preset deviation value.
Further, in this embodiment, if the electronic control unit detects that the deviation value exceeds the preset deviation threshold, the electronic throttle is subjected to a third preset number of carbon deposit removal operations; acquiring a deviation value between the electronic throttle valve and a preset standard position when each carbon deposition removing operation is finished, and comparing the acquired deviation value with a preset deviation threshold value; and if the deviation value obtained each time exceeds the preset deviation threshold value, judging that the electronic throttle valve has a fault.
The third preset number is the number of times of carbon deposit removal, and the numerical value of the third preset number is not specifically limited in this embodiment.
In the embodiment, the current power supply voltage of an electronic control unit corresponding to the electronic throttle valve and the current air inlet temperature of the electronic throttle valve are obtained; detecting whether the current air inlet temperature and the current power supply voltage both meet preset self-cleaning conditions; if so, performing carbon deposition removing operation on the electronic throttle valve; acquiring a deviation value between the electronic throttle valve and a preset standard position when the deviation correction operation is finished; judging whether the deviation value exceeds a preset deviation threshold value or not; when the deviation value does not exceed the preset deviation threshold value, it is determined that carbon deposition removal is successful, and the carbon deposition at the electronic throttle valve plate is removed, so that the problem of clamping stagnation caused by excessive carbon deposition can be further prevented.
Furthermore, an embodiment of the present invention also provides a storage medium, on which an electronic throttle failure solving program is stored, and the electronic throttle failure solving program, when executed by a processor, implements the steps of the electronic throttle failure solving method as described above.
Fig. 5 is a block diagram showing the construction of the first embodiment of the electronic throttle failure solving apparatus of the invention.
As shown in fig. 5, the electronic throttle failure solving apparatus according to the embodiment of the present invention includes:
a distance obtaining module 501, configured to obtain an initial deviation distance between a current position of the electronic throttle and a preset standard position;
a threshold determining module 502, configured to determine whether the initial deviation distance exceeds a preset deviation threshold, and if so, perform a valve flushing operation on the electronic throttle according to a preset duty ratio;
the distance obtaining module 501 is further configured to obtain an actual deviation distance between the electronic throttle and the preset standard position when the valve flushing operation is finished;
and a fault judgment module 503, configured to determine that there is no fault in the electronic throttle valve when it is detected that the actual deviation distance does not exceed the preset deviation threshold.
In the embodiment, the initial deviation distance between the current position of the electronic throttle valve and the preset standard position is obtained; judging whether the initial deviation distance exceeds a preset deviation threshold value, and if so, carrying out valve flushing operation on the electronic throttle valve according to a preset duty ratio; acquiring an actual deviation distance between the electronic throttle valve and a preset standard position when the valve flushing operation is finished; when the fact that the actual deviation distance does not exceed the preset deviation threshold value is detected, the electronic throttle valve is judged to be free of faults, the fact that whether the deviation distance between the current position of the electronic throttle valve and the standard position exceeds the preset deviation threshold value or not is detected, the electronic throttle valve is subjected to valve flushing operation when the deviation distance exceeds the preset deviation threshold value, then whether the actual deviation distance between the electronic throttle valve and the standard position after the valve flushing operation does not exceed the preset deviation threshold value or not is detected, if the actual deviation distance does not exceed the preset deviation threshold value, the valve flushing success is indicated, the electronic throttle valve is free of clamping stagnation faults, therefore, the problem of clamping stagnation of the electronic throttle.
A second embodiment of the electronic throttle failure solving apparatus of the invention is proposed based on the first embodiment of the electronic throttle failure solving apparatus of the invention.
In this embodiment, the threshold determining module 502 is configured to compare the actual deviation distance with the initial deviation distance; and if the actual deviation distance is smaller than the initial deviation distance, determining that the electronic throttle valve is in a moving state, and detecting whether the actual deviation distance exceeds the preset deviation threshold value.
Further, the threshold determination module 502 is further configured to perform the valve flushing operation on the electronic throttle valve for a first preset number of times when it is detected that the actual deviation distance exceeds the preset deviation threshold; acquiring a deviation distance between the electronic throttle valve and the preset standard position at the end of each valve flushing operation, and comparing the acquired deviation distance with the preset deviation threshold value; and if the deviation distance obtained each time exceeds the preset deviation threshold value, judging that the electronic throttle valve has a fault.
Further, the threshold determination module 502 is further configured to determine that the electronic throttle is in a non-moving state when it is detected that the actual deviation distance is equal to the initial deviation distance; when the electronic throttle valve is in a non-moving state, performing the valve flushing operation on the electronic throttle valve for a second preset number of times; acquiring a deviation distance between the electronic throttle valve and the preset standard position at the end of each valve flushing operation, and comparing the acquired deviation distance with the initial deviation distance; and if the obtained deviation distance is equal to the initial deviation distance each time, judging that the electronic throttle valve has a fault.
Further, the electronic throttle failure solving device further comprises a carbon deposition cleaning module, wherein the carbon deposition cleaning module is used for acquiring the current power supply voltage of the electronic control unit corresponding to the electronic throttle and the current air inlet temperature corresponding to the electronic throttle; detecting whether the current air inlet temperature and the current power supply voltage both meet a preset self-cleaning condition; if so, carrying out carbon deposition removing operation on the electronic throttle valve, wherein the carbon deposition removing operation comprises carbon deposition self-cleaning operation and deviation correcting operation after the carbon deposition self-cleaning operation is finished; acquiring a deviation value between the electronic throttle valve and the preset standard position when the deviation correction operation is finished; judging whether the deviation value exceeds the preset deviation threshold value or not; and when the deviation value does not exceed the preset deviation threshold value, judging that the carbon deposition removal is successful.
Further, the carbon deposition cleaning module is further configured to detect whether the current intake air temperature is within a preset temperature range and whether the current power supply voltage is higher than a preset voltage value; and if the current air inlet temperature is within the preset temperature range and the current power supply voltage is higher than the preset voltage value, judging that the preset self-cleaning condition is met.
Further, the carbon deposition cleaning module is further configured to perform the carbon deposition removing operation on the electronic throttle valve for a third preset number of times when the deviation value exceeds the preset deviation threshold value; acquiring a deviation value between the electronic throttle valve and the preset standard position when the carbon deposition removing operation is finished each time, and comparing the acquired deviation value with the preset deviation threshold value; and if the deviation value obtained each time exceeds the preset deviation threshold value, judging that the electronic throttle valve has a fault.
Other embodiments or specific implementation manners of the electronic throttle failure solving device of the invention can refer to the above method embodiments, 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 solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., a rom/ram, a magnetic disk, an optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments 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. An electronic throttle fault resolution method, characterized in that the method comprises:
acquiring an initial deviation distance between the current position of the electronic throttle valve and a preset standard position;
judging whether the initial deviation distance exceeds a preset deviation threshold value, and if so, carrying out valve flushing operation on the electronic throttle valve according to a preset duty ratio;
acquiring an actual deviation distance between the electronic throttle valve and the preset standard position when the valve flushing operation is finished;
when the actual deviation distance is detected not to exceed the preset deviation threshold value, determining that the electronic throttle valve has no fault;
before the step of obtaining the initial deviation distance between the current position of the electronic throttle valve and the preset standard position, the method further comprises the following steps:
acquiring the current power supply voltage of an electronic control unit corresponding to an electronic throttle valve and the current air inlet temperature corresponding to the electronic throttle valve;
detecting whether the current air inlet temperature and the current power supply voltage both meet a preset self-cleaning condition;
if so, carrying out carbon deposition removing operation on the electronic throttle valve, wherein the carbon deposition removing operation comprises carbon deposition self-cleaning operation and deviation correcting operation after the carbon deposition self-cleaning operation is finished;
acquiring a deviation value between the electronic throttle valve and the preset standard position when the deviation correction operation is finished;
judging whether the deviation value exceeds the preset deviation threshold value or not;
and when the deviation value does not exceed the preset deviation threshold value, judging that the carbon deposition removal is successful.
2. The method of claim 1, wherein prior to the step of determining that the electronic throttle valve is not malfunctioning upon detecting that the actual deviation distance does not exceed the preset deviation threshold, the method further comprises:
comparing the actual deviation distance to the initial deviation distance;
and if the actual deviation distance is smaller than the initial deviation distance, determining that the electronic throttle valve is in a moving state, and detecting whether the actual deviation distance exceeds the preset deviation threshold value.
3. The method of claim 2, wherein after the step of detecting whether the actual deviation distance exceeds the preset deviation threshold, the method further comprises:
if the actual deviation distance exceeds the preset deviation threshold value, carrying out the valve flushing operation on the electronic throttle valve for a first preset number of times;
acquiring a deviation distance between the electronic throttle valve and the preset standard position at the end of each valve flushing operation, and comparing the acquired deviation distance with the preset deviation threshold value;
and if the deviation distance obtained each time exceeds the preset deviation threshold value, judging that the electronic throttle valve has a fault.
4. The method of claim 2, wherein after the step of comparing the actual deviation distance to the initial deviation distance, the method further comprises:
if the actual deviation distance is equal to the initial deviation distance, determining that the electronic throttle valve is in a non-moving state;
when the electronic throttle valve is in a non-moving state, performing the valve flushing operation on the electronic throttle valve for a second preset number of times;
acquiring a deviation distance between the electronic throttle valve and the preset standard position at the end of each valve flushing operation, and comparing the acquired deviation distance with the initial deviation distance;
and if the obtained deviation distance is equal to the initial deviation distance each time, judging that the electronic throttle valve has a fault.
5. The method of claim 1, wherein the step of detecting whether the current intake air temperature and the current supply voltage both satisfy a preset self-cleaning condition comprises:
detecting whether the current air inlet temperature is in a preset temperature range or not and whether the current power supply voltage is higher than a preset voltage value or not;
and if the current air inlet temperature is within the preset temperature range and the current power supply voltage is higher than the preset voltage value, judging that the preset self-cleaning condition is met.
6. The method of claim 1, wherein after the step of determining whether the deviation value exceeds the preset deviation threshold, the method further comprises:
when the deviation value exceeds the preset deviation threshold value, performing the carbon deposition removing operation on the electronic throttle valve for a third preset number of times;
acquiring a deviation value between the electronic throttle valve and the preset standard position when the carbon deposition removing operation is finished each time, and comparing the acquired deviation value with the preset deviation threshold value;
and if the deviation value obtained each time exceeds the preset deviation threshold value, judging that the electronic throttle valve has a fault.
7. An electronic throttle failure solving apparatus, characterized in that the apparatus comprises:
the distance acquisition module is used for acquiring an initial deviation distance between the current position of the electronic throttle valve and a preset standard position;
the threshold value judging module is used for judging whether the initial deviation distance exceeds a preset deviation threshold value or not, and if so, carrying out valve flushing operation on the electronic throttle valve according to a preset duty ratio;
the distance acquisition module is further used for acquiring an actual deviation distance between the electronic throttle valve and the preset standard position when the valve flushing operation is finished;
the fault judgment module is used for judging that the electronic throttle valve has no fault when the actual deviation distance is detected to be not more than the preset deviation threshold;
the electronic throttle failure solving device further comprises a carbon deposition cleaning module, wherein the carbon deposition cleaning module is used for acquiring the current power supply voltage of an electronic control unit corresponding to the electronic throttle and the current air inlet temperature corresponding to the electronic throttle; detecting whether the current air inlet temperature and the current power supply voltage both meet a preset self-cleaning condition; if so, carrying out carbon deposition removing operation on the electronic throttle valve, wherein the carbon deposition removing operation comprises carbon deposition self-cleaning operation and deviation correcting operation after the carbon deposition self-cleaning operation is finished; acquiring a deviation value between the electronic throttle valve and the preset standard position when the deviation correction operation is finished; judging whether the deviation value exceeds the preset deviation threshold value or not; and when the deviation value does not exceed the preset deviation threshold value, judging that the carbon deposition removal is successful.
8. An electronic throttle failure resolution system, the system comprising: an electronic control unit, an engine, an electronic throttle valve, an exhaust gas recirculation cooler, an exhaust gas recirculation valve, and an electronic throttle valve malfunction solving program stored on and operable on the electronic control unit, the electronic throttle valve malfunction solving program being configured to implement the steps of the electronic throttle valve malfunction solving method according to any one of claims 1 to 6.
9. A storage medium, characterized in that the storage medium has stored thereon an electronic throttle failure solution program that, when executed by a processor, implements the steps of the electronic throttle failure solution method according to any one of claims 1 to 6.
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Families Citing this family (11)
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| CN110529249B (en) * | 2019-09-19 | 2020-12-22 | 潍柴动力股份有限公司 | Throttle valve abnormality detection method and apparatus |
| CN110410222B (en) * | 2019-09-26 | 2020-03-10 | 潍柴动力股份有限公司 | Method and equipment for judging throttle opening fault |
| CN110609538B (en) * | 2019-09-30 | 2021-04-16 | 潍柴动力股份有限公司 | Fault processing method, device, equipment and storage medium |
| CN111140377B (en) * | 2019-12-31 | 2022-07-15 | 潍柴动力股份有限公司 | Method and device for detecting misloading of throttle valve, storage medium and electronic equipment |
| CN112360639B (en) * | 2020-09-23 | 2021-11-30 | 东风汽车集团有限公司 | Fault monitoring method and device for throttle valve actuator |
| CN112197054B (en) * | 2020-09-28 | 2022-07-05 | 东风商用车有限公司 | Valve self-cleaning control method with position feedback |
| CN112631125B (en) * | 2020-12-28 | 2022-11-29 | 潍柴动力股份有限公司 | Throttle valve self-learning control method and device, storage medium and electronic equipment |
| CN113187629A (en) * | 2021-03-29 | 2021-07-30 | 广西玉柴机器股份有限公司 | Method and device for processing state of EGR valve |
| CN113062807A (en) * | 2021-03-31 | 2021-07-02 | 东风商用车有限公司 | Method and equipment for controlling clamping stagnation fault of throttle valve |
| CN113588237B (en) * | 2021-07-30 | 2023-11-28 | 东风商用车有限公司 | Torque motor valve spring detection method, device, equipment and storage medium |
| CN116014193A (en) * | 2023-01-31 | 2023-04-25 | 重庆长安新能源汽车科技有限公司 | Fuel cell throttle valve clamping stagnation escaping control method, device, equipment and medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06249040A (en) * | 1993-03-01 | 1994-09-06 | Mitsubishi Electric Corp | Vehicle control device |
| CN103388533A (en) * | 2012-05-08 | 2013-11-13 | 罗伯特·博世有限公司 | A method for diagnosing a valve of a fluid supply line |
| CN104295362A (en) * | 2013-07-17 | 2015-01-21 | 三菱自动车工业株式会社 | Control device of engine |
| CN107288763A (en) * | 2017-08-08 | 2017-10-24 | 北京汽车研究总院有限公司 | A kind of throttle valve structure and air throttle carbon distribution self cleaning method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5025778B2 (en) * | 2010-10-18 | 2012-09-12 | 三菱電機株式会社 | Electronic throttle control device |
-
2019
- 2019-06-06 CN CN201910494804.4A patent/CN110219744B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06249040A (en) * | 1993-03-01 | 1994-09-06 | Mitsubishi Electric Corp | Vehicle control device |
| CN103388533A (en) * | 2012-05-08 | 2013-11-13 | 罗伯特·博世有限公司 | A method for diagnosing a valve of a fluid supply line |
| CN104295362A (en) * | 2013-07-17 | 2015-01-21 | 三菱自动车工业株式会社 | Control device of engine |
| CN107288763A (en) * | 2017-08-08 | 2017-10-24 | 北京汽车研究总院有限公司 | A kind of throttle valve structure and air throttle carbon distribution self cleaning method |
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