CN113062807A - Method and equipment for controlling clamping stagnation fault of throttle valve - Google Patents
Method and equipment for controlling clamping stagnation fault of throttle valve Download PDFInfo
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- CN113062807A CN113062807A CN202110365053.3A CN202110365053A CN113062807A CN 113062807 A CN113062807 A CN 113062807A CN 202110365053 A CN202110365053 A CN 202110365053A CN 113062807 A CN113062807 A CN 113062807A
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 230000007704 transition Effects 0.000 claims description 22
- 239000000126 substance Substances 0.000 claims description 19
- 230000004913 activation Effects 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000011664 signaling Effects 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 230000008439 repair process Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000003213 activating effect Effects 0.000 description 4
- 238000012937 correction Methods 0.000 description 4
- 238000012806 monitoring device Methods 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
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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
Abstract
The application relates to a method and equipment for controlling a throttle valve clamping stagnation fault, which relate to the technical field of throttle valves, and comprise the following steps: after a throttle valve clamping stagnation fault signal is received, controlling the throttle valve to enter a current maximum opening state and then to be switched into a safe opening state through a driving motor; when the throttle valve is in the current maximum opening state, the opening degree of the throttle valve is the current maximum opening degree; when the throttle valve is in the safe opening state, the opening degree is smaller than that of the throttle valve in the current maximum opening state. This application utilizes driving motor control air throttle to switch at different apertures to break away from the jamming state as far as possible, and be in the aperture that can maintain the engine normal work, effectively promote the reliability of air throttle jamming trouble repair work, provide support for engine normal operating.
Description
Technical Field
The application relates to the technical field of throttle valves, in particular to a method and equipment for controlling a throttle valve clamping stagnation fault.
Background
During the operation of the engine, the throttle valve mainly controls the air intake flow of the engine according to the load of the engine to determine the operation condition of the engine.
In the traditional technical means, when the throttle valve has a clamping stagnation fault, the engine adopts a motor driving mode of forbidding the throttle valve, the throttle valve returns to a fully opened position or a position with a larger opening degree in a self-return mode through a return spring, but the capacity of the spring is limited, and the throttle valve may not return to the fully opened position or the position with the larger opening degree in the clamping stagnation.
Therefore, in order to improve the reliability of correcting the throttle valve when the throttle valve has a stuck failure, a throttle valve stuck failure control technique has been proposed.
Disclosure of Invention
The application provides a method and equipment for controlling the jamming fault of a throttle valve, which utilize a driving motor to control the throttle valve to be switched at different opening degrees, so that the throttle valve is separated from the jamming state as far as possible and is in the opening degree capable of maintaining the normal work of an engine, the reliability of the repairing work of the jamming fault of the throttle valve is effectively improved, and the support is provided for the normal operation of the engine.
In a first aspect, the present application provides a method for controlling a throttle valve sticking fault, where the method includes the following steps:
after a throttle valve clamping stagnation fault signal is received, controlling the throttle valve to enter a current maximum opening state and then to be switched into a safe opening state through a driving motor; wherein the content of the first and second substances,
when the throttle valve is in the current maximum opening state, the opening degree of the throttle valve is the current maximum opening degree;
when the throttle valve is in a safe opening state, the opening degree of the throttle valve is smaller than that of the throttle valve in the current maximum opening state.
Specifically, after receiving the throttle valve clamping stagnation fault signal, the driving motor controls the throttle valve to enter the current maximum opening state and then to be switched into the safe opening state, and the method comprises the following steps:
after the throttle valve clamping stagnation fault signal is received, a full-open control signal is applied to the driving motor, and the driving motor controls the throttle valve to enter the current maximum opening state;
and after the preset stable waiting time, applying a safety control signal to the driving motor, and controlling the throttle valve to be switched into a safe opening state by the driving motor.
Further, after the throttle valve enters the current maximum opening state and before the preset stable waiting time elapses and a safety control signal is applied to the driving motor, the method further includes the steps of:
after the preset full-open waiting time, applying a transition control signal to the driving motor, and controlling the throttle valve to enter a preset transition stable state by the driving motor; wherein the content of the first and second substances,
and when the throttle valve is in the current maximum opening state, the transition stable state and the safe working state, the opening degree of the throttle valve is reduced in sequence.
Specifically, when the throttle valve is in a safe open state, the current working load of the drive motor allows the drive motor to continue to operate.
Further, the method comprises the following steps:
and monitoring the current opening degree of the throttle valve, comparing the current opening degree with the corresponding required opening degree value of the throttle valve, judging that the throttle valve is in a normal state when the deviation value is smaller than a preset first deviation permission value, and otherwise, generating an anti-jamming strategy activation signal.
Further, the method comprises the following steps:
responding to the anti-jamming strategy activation signal, controlling the driving motor, and controlling the throttle valve to be opened fully for multiple times and closed fully for multiple times;
when the throttle valve cannot enter a preset near full-open state and a preset near full-close state, generating a throttle valve clamping stagnation fault signal; wherein the content of the first and second substances,
when the difference between the opening degree of the throttle valve in the nearly fully open state and the opening degree of the throttle valve in the fully open state is smaller than a fully open allowable deviation value;
the difference between the opening degree when the throttle valve is in the near fully closed state and the opening degree when the throttle valve is in the fully closed state is smaller than a fully closed allowable deviation value.
Further, when the throttle valve is in the safe operating state, the method further includes the steps of:
comparing the opening difference of the driving motor in the current maximum opening state and the safe working state;
when the opening difference is larger than a second deviation allowable value, the driving motor sends an opening adjusting signal, and the driving electric controls the throttle valve to be in an adjusted safe opening state; wherein the content of the first and second substances,
and when the throttle valve is in the adjusted safe opening state, the opening degree is larger than that in the safe opening state.
Preferably, the driving motor adopts a duty ratio control mode.
Specifically, the driving motor is configured with a control MAP, and the control MAP comprises throttle opening values corresponding to different operation duty ratios.
In a second aspect, the present application provides a throttle sticking fault control apparatus including:
the driving motor is used for controlling the opening of the throttle valve;
the motor control device is used for receiving a throttle valve clamping stagnation fault signal, and controlling the throttle valve to enter the current maximum opening state and then to be switched into a safe opening state by using the driving motor; wherein the content of the first and second substances,
when the throttle valve is in the current maximum opening state, the opening degree of the throttle valve is the current maximum opening degree;
when the throttle valve is in a safe opening state, the opening degree of the throttle valve is smaller than that of the throttle valve in the current maximum opening state.
The beneficial effect that technical scheme that this application provided brought includes:
this application utilizes driving motor control air throttle to switch at different apertures to break away from the jamming state as far as possible, and be in the aperture that can maintain the engine normal work, effectively promote the reliability of air throttle jamming trouble repair work, provide support for engine normal operating.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flowchart illustrating steps S1-S2 of a method for controlling a throttle sticking fault in accordance with an embodiment of the present invention;
FIG. 2 is a flowchart illustrating steps Q1-Q2 of a throttle stuck fault control method provided in an embodiment of the present application;
fig. 3 is a block diagram showing the structure of a throttle sticking failure control apparatus provided in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The embodiment of the application provides a method and equipment for controlling the throttle valve clamping stagnation fault, wherein the driving motor is used for controlling the throttle valve to be switched at different opening degrees, so that the throttle valve is separated from the clamping stagnation state as far as possible and is in the opening degree capable of maintaining the normal work of an engine, the reliability of the throttle valve clamping stagnation fault repairing work is effectively improved, and the support is provided for the normal operation of the engine.
In order to achieve the technical effects, the general idea of the application is as follows:
a method for controlling a throttle valve clamping stagnation fault comprises the following steps:
after a throttle valve clamping stagnation fault signal is received, controlling the throttle valve to enter a current maximum opening state and then to be switched into a safe opening state through a driving motor; wherein the content of the first and second substances,
when the throttle valve is in the current maximum opening state, the opening degree of the throttle valve is the current maximum opening degree;
when the throttle valve is in the safe opening state, the opening degree is smaller than that of the throttle valve in the current maximum opening state.
Embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
In a first aspect, referring to fig. 1 to 2, an embodiment of the present application provides a throttle sticking fault control method, including the following steps:
after a throttle valve clamping stagnation fault signal is received, controlling the throttle valve to enter a current maximum opening state and then to be switched into a safe opening state through a driving motor; wherein the content of the first and second substances,
when the throttle valve is in the current maximum opening state, the opening degree of the throttle valve is the current maximum opening degree;
when the throttle valve is in the safe opening state, the opening degree is smaller than that of the throttle valve in the current maximum opening state.
In the embodiment of the application, the driving motor is used for controlling the throttle valve to be switched at different opening degrees, so that the throttle valve is separated from a clamping stagnation state as far as possible and is in the opening degree capable of maintaining normal work of the engine, the reliability of the clamping stagnation fault repair work of the throttle valve is effectively improved, and support is provided for normal operation of the engine.
Specifically, after a throttle clamping failure signal is received, the throttle is controlled to enter a current maximum opening state through a driving motor and then is switched into a safe opening state, and the method comprises the following steps:
after a throttle valve clamping stagnation fault signal is received, a full-open control signal is applied to a driving motor, and the driving motor controls a throttle valve to enter a current maximum opening state;
and after the preset stable waiting time, applying a safety control signal to the driving motor, and controlling the throttle valve to be switched into a safe opening state by the driving motor.
Further, after the throttle valve enters the current maximum opening state and after a preset stable waiting time, before a safety control signal is applied to the driving motor, the throttle valve clamping failure control method further comprises the following steps:
after the preset full-open waiting time, applying a transition control signal to the driving motor, and controlling the throttle valve to enter a preset transition stable state by the driving motor; wherein the content of the first and second substances,
and when the throttle valve is in the current maximum opening state, the transition stable state and the safe working state, the opening degree of the throttle valve is reduced in sequence.
In the practical implementation process of the application, the method for controlling the clamping stagnation fault of the throttle valve comprises the following steps:
s1, after the throttle valve clamping stagnation fault signal is received, a full-open control signal is applied to the driving motor, and the driving motor controls the throttle valve to enter the current maximum open state;
s2, after the preset full-open waiting time, applying a transition control signal to the driving motor, and controlling the throttle valve to enter a preset transition stable state by the driving motor;
s3, after the preset stable waiting time, applying a safety control signal to the driving motor, and controlling the throttle valve to be in a safe opening state by the driving motor;
it should be noted that, after the throttle enters the current maximum opening state, a transition control signal is applied to the driving motor after a preset full-open waiting time;
similarly, after the driving motor controls the throttle valve to enter a preset transition stable state, a safety control signal is applied to the driving motor after a preset stable waiting time.
In the embodiment of the present application, the specific situations are as follows:
the key of the vehicle is ensured to be in a key ON gear, the battery voltage supplies power normally, when the activating condition of the throttle clamping stagnation fault control strategy is met, according to the maximum operation duty ratio of the driving motor allowing the operation of the throttle valve under different voltage states, the opening of the throttle valve is driven towards the full opening direction, within the sustainable time of the maximum operation duty ratio of the driving motor corresponding to the current voltage (for example, under the voltage of 26V, the throttle opening value corresponding to the maximum operation duty ratio of the driving motor is 80%, the driving motor is allowed to operate for 3s under the operation duty ratio, and according to the limit time, a certain margin is reserved, for example, the driving motor operates for 1.5s with the maximum operation duty ratio of the driving motor), and then the driving motor safety duty ratio allowed to operate for a long time is adopted for control (for example, under the voltage of 26V, the safety duty ratio is below 45%, and the safety duty ratio can be calibrated to about 20%).
Specifically, when the throttle valve is in the safe open state, the current operating load of the drive motor allows the drive motor to continue operating.
Further, before receiving the throttle clamping failure signal, the method further comprises a step of generating the throttle clamping failure signal, namely the throttle clamping failure control method further comprises the following steps:
q1, monitoring the current opening of the throttle valve, comparing the current opening with the corresponding required opening value of the throttle valve, judging that the throttle valve is in a normal state when the deviation value is smaller than a preset first deviation permission value, and otherwise, generating an anti-jamming strategy activation signal.
Further, the throttle valve clamping stagnation fault control method further comprises the following steps:
q2, responding to the anti-jamming strategy activation signal, controlling the driving motor, and controlling the throttle to be opened fully for multiple times and closed fully for multiple times;
when the throttle valve cannot enter a preset near full-open state and a preset near full-close state, a throttle valve clamping stagnation fault signal is generated; wherein the content of the first and second substances,
when the throttle valve is close to the fully open state, the difference between the opening degree of the throttle valve and the opening degree of the throttle valve in the fully open state is smaller than the fully open allowable deviation value;
the difference between the opening degree when the throttle valve is in the nearly fully closed state and the opening degree when the throttle valve is in the fully closed state is smaller than the fully closed allowable deviation value.
It should be noted that the state close to the fully open state means that the current throttle valve is close to the fully open state, and the state close to the fully closed state means that the current throttle valve is close to the closed state;
for example, the opening degree of the throttle valve when it is in the fully open state is 100%, the opening degree of the throttle valve when it is in the fully closed state is 0%, and both the fully open allowable deviation value and the fully closed allowable deviation value can be set to 5%;
then, the opening degree when the throttle valve is in the nearly fully open state may be larger than 95%, and the opening degree when the throttle valve is in the nearly fully closed state may be smaller than 5%.
In specific implementation, the anti-jamming strategy is as follows:
when the difference between the required throttle opening and the actual throttle opening reaches a certain deviation and the current throttle does not have an external control requirement, activating an anti-jamming strategy, performing valve flushing action according to the duty ratio of the operation of a driving motor set by the anti-jamming strategy, and checking whether the throttle opening under the control of the duty ratio can reach the vicinity of 100% or not and whether the throttle opening under the control of the negative duty ratio can reach the vicinity of 0% or not after three times of impact;
if the throttle position can be opened to be close to 100% position and 0% position (generally set to be 5%), the throttle valve is considered not to be stuck, and if the throttle valve cannot be returned to be close to 100% position or 0% position (generally set to be 5%), the throttle valve is considered to be stuck, so that a throttle valve stuck fault is reported;
wherein, the current throttle external control requirement refers to the external test of the throttle performed by the service station diagnostic instrument.
Further, when the throttle valve is in a safe working state, the throttle valve clamping stagnation fault control method further comprises the following steps:
comparing the opening difference of the driving motor in the current maximum opening state and the safe working state;
when the opening difference is larger than the second deviation allowable value, the driving motor sends an opening adjusting signal to drive the electrically controlled throttle valve to be in an adjusted safe opening state; wherein the content of the first and second substances,
the opening degree when the throttle valve is in the adjusted safe opening state is larger than the opening degree when the throttle valve is in the safe opening state.
The difference of the opening degrees of the driving motor in the current maximum opening state and the safe working state represents the running deviation of the throttle valve and corresponds to the trend of the throttle valve running towards full close;
if the difference in the opening degree, that is, the throttle operation deviation is larger than the second deviation allowable value, it is considered that the throttle operation amount in the fully-closed direction is excessively large, which may lead to an increase in deterioration of the engine performance, and in the serious case, may lead to a loss of vehicle power.
Therefore, when the throttle operation deviation exceeds the set limit value, namely exceeds the second deviation allowable value, on the basis of the throttle operation deviation, a correction towards the full opening direction is added, the correction is summed and superposed with the previous motor operation duty ratio, when the throttle opening is disturbed by the airflow, the duty ratio driving is added, the stability of the throttle position is controlled, the trend that the throttle is operated towards the full closing direction is eliminated, and the throttle opening is kept at the maximum position which can be reached under the clamping stagnation state.
It should be noted that the driving motor in the embodiment of the present application adopts a duty ratio control manner;
the full-open control signal, the safety control signal, the transition control signal and the adjusting opening degree signal respectively correspond to different operation duty ratios of the driving motor.
Correspondingly, the driving motor in the embodiment of the application is provided with a control MAP (MAP), and the control MAP comprises throttle opening values corresponding to different operation duty ratios;
in actual implementation, the control MAP comprises throttle opening values corresponding to different operation duty ratios and corresponding sustainable operation time;
the control MAP graph can be recorded as PWM-MAP, and the PWM is Pulse Width Modulation;
the PWM-MAP is set according to voltage, corresponds to the sustainable time with different duty ratios, and is mainly used for realizing the protection function of the driving motor and preventing the problem of motor failure caused by overload;
the PWM-MAP comprises MAX-PWM, wherein the MAX-PWM represents the maximum duty ratio allowed to be applied according to the full opening direction of the throttle valve, and the maximum duty ratio is used for impacting a throttle valve plate when the delay of a throttle valve card is detected so as to enable the throttle valve to run towards the full opening direction;
after the throttle valve clamping stagnation fault signal is reported, firstly, MAX-PWM control is adopted, the control lasts for a certain time (the time duration is set according to the requirement of a motor, for example, the duty ratio of 80% is allowed to run for 3s, and can be marked as 1.5s), then the running duty ratio of a driving motor corresponding to the throttle valve is adjusted according to PWM-MAP, the running duty ratio is reduced to the duty ratio allowed to run for a long time, and after a throttle valve plate is stable, the running duty ratio of the driving motor corresponding to the throttle valve is further reduced to a safe duty ratio.
In addition, when the throttle valve is in a SAFE opening state, the current working load of the driving motor allows the driving motor to continuously work, so in the PWM-MAP, the SAFE-PWM is used for representing the operation duty ratio corresponding to the driving motor when the throttle valve is in the SAFE opening state, namely representing the operation duty ratio capable of controlling the motor to operate for a long time, mainly aiming at maintaining the opening degree of the throttle valve, when a valve plate of the throttle valve does not tend to operate in a full closing direction, the control is always carried out based on SAFE-PWM, the power consumption and the aging of the motor are reduced, for example, the operation duty ratio corresponding to the opening degree of the throttle valve below 45% can be operated for a long time, and the SAFE-PWM can be set as the operation duty ratio corresponding to;
when the air flow impact is finished, the throttle valve returns to the maximum position, the duty ratio is gradually reduced and returns to the calibrated SAFE-PWM for control, the power consumption is reduced, and the attenuation of the motor is avoided.
In a second aspect, referring to fig. 3, an embodiment of the present application provides a throttle sticking fault control apparatus for implementing the throttle sticking fault control method of the first aspect, the throttle sticking fault control apparatus including:
the driving motor is used for controlling the opening of the throttle valve;
the motor control device is used for receiving a throttle clamping stagnation fault signal, and controlling the throttle to enter the current maximum opening state and then to be switched into a safe opening state by using the driving motor; wherein the content of the first and second substances,
when the throttle valve is in the current maximum opening state, the opening degree of the throttle valve is the current maximum opening degree;
when the throttle valve is in the safe opening state, the opening degree is smaller than that of the throttle valve in the current maximum opening state.
In the embodiment of the application, the driving motor is used for controlling the throttle valve to be switched at different opening degrees, so that the throttle valve is separated from a clamping stagnation state as far as possible and is in the opening degree capable of maintaining normal work of the engine, the reliability of the clamping stagnation fault repair work of the throttle valve is effectively improved, and support is provided for normal operation of the engine.
Furthermore, the motor control device is also used for applying a full-open control signal to the driving motor after receiving the throttle valve clamping failure signal, and the driving motor controls the throttle valve to enter the current maximum opening state;
the motor control device is also used for applying a safety control signal to the driving motor after the preset stable waiting time, and the driving motor controls the throttle valve to be switched into a safe opening state.
Further, the motor control device is further configured to perform the following operations before applying the safety control signal to the driving motor after the throttle valve enters the current maximum opening state and after a preset stable waiting time elapses:
after the preset full-open waiting time, applying a transition control signal to the driving motor, and controlling the throttle valve to enter a preset transition stable state by the driving motor; wherein the content of the first and second substances,
and when the throttle valve is in the current maximum opening state, the transition stable state and the safe working state, the opening degree of the throttle valve is reduced in sequence.
In the practical implementation process of the control device, the working process of the throttle clamping stagnation fault control device is as follows:
s1, after the throttle valve clamping stagnation fault signal is received, a full-open control signal is applied to the driving motor, and the driving motor controls the throttle valve to enter the current maximum open state;
s2, after the preset full-open waiting time, applying a transition control signal to the driving motor, and controlling the throttle valve to enter a preset transition stable state by the driving motor;
s3, after the preset stable waiting time, applying a safety control signal to the driving motor, and controlling the throttle valve to be in a safe opening state by the driving motor;
it should be noted that, after the throttle enters the current maximum opening state, a transition control signal is applied to the driving motor after a preset full-open waiting time;
similarly, after the driving motor controls the throttle valve to enter a preset transition stable state, a safety control signal is applied to the driving motor after a preset stable waiting time.
In the embodiment of the application, the specific working conditions of the throttle clamping stagnation fault control device are as follows:
the key of the vehicle is ensured to be in a key ON gear, the battery voltage supplies power normally, when the activating condition of the throttle clamping stagnation fault control strategy is met, according to the maximum operation duty ratio of the driving motor allowing the operation of the throttle valve under different voltage states, the opening of the throttle valve is driven towards the full opening direction, within the sustainable time of the maximum operation duty ratio of the driving motor corresponding to the current voltage (for example, under the voltage of 26V, the throttle opening value corresponding to the maximum operation duty ratio of the driving motor is 80%, the driving motor is allowed to operate for 3s under the operation duty ratio, and according to the limit time, a certain margin is reserved, for example, the driving motor operates for 1.5s with the maximum operation duty ratio of the driving motor), and then the driving motor safety duty ratio allowed to operate for a long time is adopted for control (for example, under the voltage of 26V, the safety duty ratio is below 45%, and the safety duty ratio can be calibrated to about 20%).
It should be noted that, when the throttle valve is in the safe open state, the current operating load of the drive motor allows the drive motor to continue operating.
Specifically, the throttle valve clamping stagnation fault control equipment further comprises a throttle valve opening monitoring device, wherein the throttle valve opening monitoring device is used for monitoring the current opening of the throttle valve, comparing the current opening of the throttle valve with a corresponding throttle valve opening required value, and when a deviation value is smaller than a preset first deviation allowable value, judging that the throttle valve is in a normal state, otherwise, generating a clamping stagnation prevention strategy activation signal.
Furthermore, the motor control device is also used for responding to the anti-jamming strategy activation signal, controlling the driving motor and controlling the throttle valve to be fully opened for multiple times and fully closed for multiple times;
the motor control device is also used for generating a throttle clamping stagnation fault signal when the throttle cannot enter a preset near full-open state and a preset near full-close state; wherein the content of the first and second substances,
when the throttle valve is close to the fully open state, the difference between the opening degree of the throttle valve and the opening degree of the throttle valve in the fully open state is smaller than the fully open allowable deviation value;
the difference between the opening degree when the throttle valve is in the nearly fully closed state and the opening degree when the throttle valve is in the fully closed state is smaller than the fully closed allowable deviation value.
In specific implementation, the anti-jamming strategy of the throttle valve jamming fault control equipment is as follows:
when the difference between the required throttle opening and the actual throttle opening reaches a certain deviation and the current throttle does not have an external control requirement, activating an anti-jamming strategy, performing valve flushing action according to the duty ratio of the operation of a driving motor set by the anti-jamming strategy, and checking whether the throttle opening under the control of the duty ratio can reach the vicinity of 100% or not and whether the throttle opening under the control of the negative duty ratio can reach the vicinity of 0% or not after three times of impact;
if the throttle position can be opened to be close to 100% position and 0% position (generally set to be 5%), the throttle valve is considered not to be stuck, and if the throttle valve cannot be returned to be close to 100% position or 0% position (generally set to be 5%), the throttle valve is considered to be stuck, so that a throttle valve stuck fault is reported;
wherein, the current throttle external control requirement refers to the external test of the throttle performed by the service station diagnostic instrument.
Furthermore, the throttle opening monitoring device is also used for comparing the opening difference of the driving motor in the current maximum opening state and in the safe working state;
the throttle opening monitoring device is also used for sending an opening adjusting signal by the driving motor when the opening difference is larger than a second deviation allowable value, and driving the electrically controlled throttle to be in an adjusted safe opening state; wherein the content of the first and second substances,
the opening degree when the throttle valve is in the adjusted safe opening state is larger than the opening degree when the throttle valve is in the safe opening state.
The difference of the opening degrees of the driving motor in the current maximum opening state and the safe working state represents the running deviation of the throttle valve and corresponds to the trend of the throttle valve running towards full close;
if the difference in the opening degree, that is, the throttle operation deviation is larger than the second deviation allowable value, it is considered that the throttle operation amount in the fully-closed direction is excessively large, which may lead to an increase in deterioration of the engine performance, and in the serious case, may lead to a loss of vehicle power.
Therefore, when the throttle operation deviation exceeds the set limit value, namely exceeds the second deviation allowable value, on the basis of the throttle operation deviation, a correction towards the full opening direction is added, the correction is summed and superposed with the previous motor operation duty ratio, when the throttle opening is disturbed by the airflow, the duty ratio driving is added, the stability of the throttle position is controlled, the trend that the throttle is operated towards the full closing direction is eliminated, and the throttle opening is kept at the maximum position which can be reached under the clamping stagnation state.
It should be noted that the driving motor and the motor starting device in the embodiment of the present application adopt a duty ratio control mode;
the full-open control signal, the safety control signal, the transition control signal and the adjusting opening degree signal respectively correspond to different operation duty ratios of the driving motor.
Correspondingly, the driving motor and the motor starting device in the embodiment of the application are configured with a control MAP (MAP), and the control MAP comprises throttle opening values corresponding to different operation duty ratios;
in actual implementation, the control MAP includes throttle opening values corresponding to different operation duty ratios and corresponding sustainable operation time.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present application and are presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A throttle stuck fault control method, comprising the steps of:
after a throttle valve clamping stagnation fault signal is received, controlling the throttle valve to enter a current maximum opening state and then to be switched into a safe opening state through a driving motor; wherein the content of the first and second substances,
when the throttle valve is in the current maximum opening state, the opening degree of the throttle valve is the current maximum opening degree;
when the throttle valve is in a safe opening state, the opening degree of the throttle valve is smaller than that of the throttle valve in the current maximum opening state.
2. The throttle valve sticking fault control method according to claim 1, wherein the step of controlling the throttle valve to enter the current maximum opening state and then to be shifted into the safe opening state by the driving motor after receiving the throttle valve sticking fault signal comprises the steps of:
after the throttle valve clamping stagnation fault signal is received, a full-open control signal is applied to the driving motor, and the driving motor controls the throttle valve to enter the current maximum opening state;
and after the preset stable waiting time, applying a safety control signal to the driving motor, and controlling the throttle valve to be switched into a safe opening state by the driving motor.
3. The throttle jam fault control method as set forth in claim 2, wherein before the safety control signal is applied to the drive motor after the preset stabilization waiting time elapses after the throttle valve enters the current maximum open state, the method further comprises the steps of:
after the preset full-open waiting time, applying a transition control signal to the driving motor, and controlling the throttle valve to enter a preset transition stable state by the driving motor; wherein the content of the first and second substances,
and when the throttle valve is in the current maximum opening state, the transition stable state and the safe working state, the opening degree of the throttle valve is reduced in sequence.
4. The throttle jam fault control method according to claim 1, characterized in that:
when the throttle valve is in a safe opening state, the current working load of the driving motor allows the driving motor to continuously work.
5. The throttle stuck fault control method as recited in claim 1, characterized by further comprising the steps of:
and monitoring the current opening degree of the throttle valve, comparing the current opening degree with the corresponding required opening degree value of the throttle valve, judging that the throttle valve is in a normal state when the deviation value is smaller than a preset first deviation permission value, and otherwise, generating an anti-jamming strategy activation signal.
6. The throttle stuck fault control method as recited in claim 5, characterized by further comprising the steps of:
responding to the anti-jamming strategy activation signal, controlling the driving motor, and controlling the throttle valve to be opened fully for multiple times and closed fully for multiple times;
when the throttle valve cannot enter a preset near full-open state and a preset near full-close state, generating a throttle valve clamping stagnation fault signal; wherein the content of the first and second substances,
when the difference between the opening degree of the throttle valve in the nearly fully open state and the opening degree of the throttle valve in the fully open state is smaller than a fully open allowable deviation value;
the difference between the opening degree when the throttle valve is in the near fully closed state and the opening degree when the throttle valve is in the fully closed state is smaller than a fully closed allowable deviation value.
7. The throttle jam fault control method according to claim 1, characterized by further comprising, when the throttle valve is in the safe operating state, the steps of:
comparing the opening difference of the driving motor in the current maximum opening state and the safe working state;
when the opening difference is larger than a second deviation allowable value, the driving motor sends an opening adjusting signal, and the driving electric controls the throttle valve to be in an adjusted safe opening state; wherein the content of the first and second substances,
and when the throttle valve is in the adjusted safe opening state, the opening degree is larger than that in the safe opening state.
8. The throttle jam fault control method according to claim 1, characterized in that:
the driving motor adopts a duty ratio control mode.
9. The throttle jam fault control method according to claim 1, characterized in that:
the driving motor is provided with a control MAP (MAP) which comprises throttle opening values corresponding to different operation duty ratios.
10. A throttle jam fault control apparatus, characterized by comprising:
the driving motor is used for controlling the opening of the throttle valve;
the motor control device is used for receiving a throttle valve clamping stagnation fault signal, and controlling the throttle valve to enter the current maximum opening state and then to be switched into a safe opening state by using the driving motor; wherein the content of the first and second substances,
when the throttle valve is in the current maximum opening state, the opening degree of the throttle valve is the current maximum opening degree;
when the throttle valve is in a safe opening state, the opening degree of the throttle valve is smaller than that of the throttle valve in the current maximum opening state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110365053.3A CN113062807A (en) | 2021-03-31 | 2021-03-31 | Method and equipment for controlling clamping stagnation fault of throttle valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110365053.3A CN113062807A (en) | 2021-03-31 | 2021-03-31 | Method and equipment for controlling clamping stagnation fault of throttle valve |
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| CN113062807A true CN113062807A (en) | 2021-07-02 |
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| CN202110365053.3A Pending CN113062807A (en) | 2021-03-31 | 2021-03-31 | Method and equipment for controlling clamping stagnation fault of throttle valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114802494A (en) * | 2021-07-23 | 2022-07-29 | 长城汽车股份有限公司 | Electric tail driving control method and control device |
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