CN108005796B - Electronic throttle control method and device and automobile - Google Patents

Electronic throttle control method and device and automobile Download PDF

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Publication number
CN108005796B
CN108005796B CN201711217147.6A CN201711217147A CN108005796B CN 108005796 B CN108005796 B CN 108005796B CN 201711217147 A CN201711217147 A CN 201711217147A CN 108005796 B CN108005796 B CN 108005796B
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China
Prior art keywords
electronic throttle
throttle valve
target position
valve plate
movement
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CN201711217147.6A
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CN108005796A (en
Inventor
刘军
陈志平
马艳
吴小同
李建
于建波
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BAIC Group ORV Co ltd
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Beijing Automotive Research Institute Co Ltd
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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
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D11/107—Safety-related aspects
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201—Arrangements; Control features; Details thereof
    • F02D2009/0277—Fail-safe mechanisms, e.g. with limp-home feature, to close throttle if actuator fails, or if control cable sticks or breaks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0404—Throttle position

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The invention discloses an electronic throttle control method, an electronic throttle control device and an automobile, wherein the electronic throttle control method comprises the following steps: the method comprises the steps that in the process that an electronic throttle valve plate moves to a target position, the distance between the current position of the electronic throttle valve plate and the target position is obtained; controlling the movement speed of the electronic throttle valve plate to be smaller than a first speed when the distance reaches a first range; after the electronic throttle valve plate stops moving, sending a driving signal to the electronic throttle valve to enable the electronic throttle valve plate to be kept at the actual position where the movement stops; and obtaining a judgment result whether the actual position of the movement stop is consistent with the target position. The electronic throttle control method avoids valve plate collision caused by too fast movement of the valve plate when the electronic throttle is close to the target position and avoids influence on accuracy of engine control due to inaccurate opening of the electronic throttle.

Description

Electronic throttle control method and device and automobile
Technical Field
The invention relates to the field of electronic throttles, in particular to a method and a device for controlling an electronic throttle and an automobile.
Background
With the implementation of the emission regulations of the fifth and sixth countries of the diesel engine, accurate control of the air intake of the engine is required. Therefore, an electronic throttle valve is required to be added in an air intake system, and the main functions of the throttle valve comprise optimizing combustion efficiency and reducing emission pollution by adjusting air intake pressure difference; on the other hand, when the engine is flamed out, the vibration is reduced by blocking air inlet, and the driving comfort is improved. The stability and accuracy of the electronic throttle valve control are the key for controlling the fresh air quantity of the engine combustion, so that the stable and accurate rotating speed and power control of the engine is guaranteed. Therefore, the valve plate opening is inaccurate due to serious carbon deposition or damage of the electronic throttle valve, and the accuracy of engine control is directly influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides an electronic throttle control method, an electronic throttle control device and an automobile, and solves the problem that the accuracy of engine control is influenced due to inaccurate opening of a valve plate of the electronic throttle.
According to an aspect of the present invention, there is provided an electronic throttle control method including:
the method comprises the steps that in the process that an electronic throttle valve plate moves to a target position, the distance between the current position of the electronic throttle valve plate and the target position is obtained;
controlling the movement speed of the electronic throttle valve plate to be smaller than a first speed when the distance reaches a first range;
after the electronic throttle valve plate stops moving, sending a driving signal to the electronic throttle valve to enable the electronic throttle valve plate to be kept at the actual position where the movement stops;
and obtaining a judgment result whether the actual position of the movement stop is consistent with the target position.
Optionally, the step of sending a driving signal to the electronic throttle valve after the electronic throttle valve plate stops moving to keep the electronic throttle valve plate at the actual position where the movement stops includes:
obtaining the working state of the electronic throttle valve;
when the working state of the electronic throttle valve is a mechanical top dead center self-learning state or a partial opening state in the driving process, sending a first driving signal to the electronic throttle valve after the movement of a valve plate of the electronic throttle valve stops; or,
and when the working state of the electronic throttle valve is a mechanical bottom dead center self-learning state, sending a second driving signal to the electronic throttle valve after the movement of the valve plate of the electronic throttle valve is stopped.
Optionally, the step of obtaining a judgment result whether the actual position of the motion stop is consistent with the target position comprises:
acquiring position signals of the valve plate for preset times;
reading the average value of the position signals for preset times;
and when the difference value between the average value and the target position is larger than a first range, determining that the actual position of the motion stop is inconsistent with the target position, otherwise, determining that the actual position of the motion stop is consistent with the target position.
Optionally, the electronic throttle control method further comprises:
and if the working state of the electronic throttle valve is a mechanical top dead center self-learning state or a mechanical bottom dead center self-learning state, and the actual position of the movement stop is inconsistent with the target position, controlling the electronic throttle valve to execute a self-cleaning program.
Optionally, the step of controlling the electronic throttle valve to execute a self-cleaning program further comprises:
repeatedly obtaining a judgment result whether the actual position of the movement stop is consistent with the target position or not;
and if the judgment result is that the actual position of the movement stop is not consistent with the target position, controlling to light a fault lamp.
Optionally, the electronic throttle control method further comprises:
and if the working state of the electronic throttle valve is a partial opening state in the driving process and the actual position of the movement stop is inconsistent with the target position, sending a first driving signal to the electronic throttle valve and controlling to light a fault lamp.
Optionally, the electronic throttle control method further comprises:
if the working state of the electronic throttle valve is a partial opening state in the driving process and the actual position of the movement stop is consistent with the target position, judging whether the difference value between the average value and the target position is larger than a second range, wherein the second range is smaller than the first range;
if the difference value is larger than the second range, acquiring the current speed of the electronic throttle valve;
and if the speed is less than the second speed, sending a third driving signal to the electronic throttle valve.
Optionally, the third driving signal is a sum of the first driving signal and the gain signal;
wherein the gain signal is given by a formula
Figure BDA0001485750870000031
Calculating to obtain;
wherein the OFFSET is a gain value, R is a direct current motor resistance, KCIs the torque constant of the DC motor, CroFor spring initial load, N is the gear ratio.
In accordance with another aspect of the present invention, there is provided an electronic throttle control apparatus including:
the first acquisition module is used for acquiring the distance between the current position of the electronic throttle valve plate and a target position in the process that the electronic throttle valve plate moves to the target position;
the first control module is used for controlling the movement speed of the electronic throttle valve plate to be smaller than a first speed when the distance reaches a first range;
the driving module is used for sending a driving signal to the electronic throttle valve after the electronic throttle valve plate stops moving so as to keep the electronic throttle valve plate at the actual position where the movement stops;
and the second acquisition module is used for acquiring a judgment result whether the actual position of the movement stop is consistent with the target position.
Optionally, the driving module comprises:
a first acquisition unit for acquiring an operating state of the electronic throttle valve;
the first driving unit is used for sending a first driving signal to the electronic throttle valve after the valve plate of the electronic throttle valve stops moving when the working state of the electronic throttle valve is a mechanical top dead center self-learning state or a partial opening state in the driving process; or,
and the second driving unit is used for sending a second driving signal to the electronic throttle valve after the valve plate of the electronic throttle valve stops moving when the working state of the electronic throttle valve is a mechanical bottom dead center self-learning state.
Optionally, the second obtaining module includes:
the second acquisition unit is used for acquiring position signals of the valve plate for preset times;
a reading unit for reading an average value of the position signals for a preset number of times;
and the determining unit is used for determining that the actual position of the motion stop is inconsistent with the target position when the difference value between the average value and the target position is larger than a first range, otherwise, determining that the actual position of the motion stop is consistent with the target position.
Optionally, the electronic throttle control apparatus further comprises:
and the second control module is used for controlling the electronic throttle valve to execute a self-cleaning program if the working state of the electronic throttle valve is a mechanical top dead center self-learning state or a mechanical bottom dead center self-learning state and the actual position of the motion stop is inconsistent with the target position.
Optionally, the electronic throttle control apparatus further comprises:
the third acquisition module is used for repeatedly acquiring a judgment result whether the actual position of the movement stop is consistent with the target position or not;
and the third control module is used for controlling to light a fault lamp if the judgment result shows that the actual position of the movement stop is inconsistent with the target position.
Optionally, the electronic throttle control apparatus further comprises:
and the fourth control module is used for sending a first driving signal to the electronic throttle valve and controlling to light a fault lamp if the working state of the electronic throttle valve is a partial opening state in the driving process and the actual position of the movement stop is inconsistent with the target position.
Optionally, the electronic throttle control apparatus further comprises:
the judging module is used for judging whether the difference value between the average value and the target position is larger than a second range or not if the working state of the electronic throttle valve is a partial opening state in the driving process and the actual position of the movement stop is consistent with the target position, and the second range is smaller than the first range;
the fourth obtaining module is used for obtaining the current speed of the electronic throttle valve if the difference value is larger than the second range;
and the fifth control module is used for sending a third driving signal to the electronic throttle valve if the speed is less than the second speed.
Optionally, the third driving signal is a sum of the first driving signal and the gain signal;
wherein the gain signal is given by a formula
Figure BDA0001485750870000041
Calculating to obtain;
wherein the OFFSET is a gain value, R is a direct current motor resistance, KCIs the torque constant of the DC motor, CroFor spring initial load, N is the gear ratio.
According to still another aspect of the present invention, there is provided an automobile including the above-described electronic throttle control apparatus.
The embodiment of the invention has the beneficial effects that:
in the scheme, the electronic throttle control method avoids the valve plate from being damaged due to the fact that the valve plate moves too fast when the electronic throttle control method is close to the target position by controlling the movement speed of the valve plate; whether the electronic throttle valve can work normally or not is detected in time by judging the consistency of the actual position where the valve plate stops moving and the target position, and a driver is reminded through a fault indicating lamp, so that the influence on the accuracy of engine control caused by inaccurate opening of the electronic throttle valve is avoided.
Drawings
FIG. 1 is a flow chart illustrating a method of electronic throttle control according to an embodiment of the present invention;
FIG. 2 shows a schematic flow chart of steps 13 and 14 in FIG. 1 according to an embodiment of the present invention;
FIG. 3 is a detailed flowchart of an electronic throttle control apparatus according to an embodiment of the present invention;
FIG. 4 is a block diagram showing the construction of an electronic throttle control apparatus according to the embodiment of the invention;
fig. 5 is a block diagram illustrating a specific structure of the driving module 43 and the second obtaining module 44 in fig. 4 according to an embodiment of the present invention;
fig. 6 is a block diagram showing a specific configuration of an electronic throttle control apparatus according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides an electronic throttle control method including:
step 11, acquiring the distance between the current position of the electronic throttle valve plate and the target position in the process that the electronic throttle valve plate moves to the target position;
step 12, controlling the movement speed of the electronic throttle valve plate to be smaller than a first speed when the distance reaches a first range;
step 13, sending a driving signal to the electronic throttle valve after the electronic throttle valve plate stops moving so that the electronic throttle valve plate is kept at the actual position where the movement stops;
and 14, obtaining a judgment result whether the actual position of the motion stop is consistent with the target position.
In this embodiment, the electronic throttle control method is applicable to a diesel engine, and an Electronic Control Unit (ECU) controls the opening of the electronic throttle according to an accelerator pedal position signal, thereby achieving the optimal torque output over the full range of the engine. When the ECU controls the electronic throttle valve plate to move towards the target position, the position sensor acquires the position signal of the electronic throttle valve plate in real time, and the electronic throttle valve plate is controlled to move to a first range from the target position, wherein the moving speed is lower than the first speed. The valve plate is controlled to move at a lower speed when the valve plate is close to the target position, so that the valve plate of the electronic throttle valve is prevented from being damaged due to the fact that the valve plate moves at an excessively high speed. Wherein the first range is 0-5%; the first speed is 50 DEG/S, namely the movement speed of the electronic throttle valve plate is controlled to be less than 50 DEG/S when the electronic throttle valve plate moves to a distance less than 5% of the target position.
After the movement of the electronic throttle valve plate is stopped, the ECU sends a driving signal to the electronic throttle valve to enable the valve plate to be kept at the stop position, the actual position of the stop of the valve plate obtained by the position sensor is compared with the target position, whether the electronic throttle valve accurately moves to the target position is judged, whether the opening of the electronic throttle valve plate is accurate can be detected in time, whether the electronic throttle valve can normally work is judged, a driver is reminded through a fault indicator lamp, and the problem that the accuracy of engine control is influenced due to the inaccurate opening of the electronic throttle valve is avoided.
Specifically, as shown in fig. 2, step 13 includes:
131, acquiring the working state of the electronic throttle valve;
in the embodiment, the working state of the electronic throttle valve comprises a mechanical bottom dead center self-learning state when the ECU is electrified, a mechanical top dead center self-learning state when the ECU is electrified, and a state that the ECU controls the electronic throttle valve to be partially opened according to an accelerator pedal position signal during driving.
Step 132, when the working state of the electronic throttle valve is a mechanical top dead center self-learning state or a partial opening state in the driving process, sending a first driving signal to the electronic throttle valve after the movement of a valve plate of the electronic throttle valve stops; or,
and step 133, when the working state of the electronic throttle valve is a mechanical bottom dead center self-learning state, sending a second driving signal to the electronic throttle valve after the motion of the valve plate of the electronic throttle valve stops.
In this embodiment, the mechanical top dead center is a full open position of the electronic throttle, which may be 90%, and the corresponding voltage value is 4.5V; the mechanical bottom dead center is a full-closed position of the electronic throttle valve, and may be 15%, and the corresponding voltage value is 0.75V, and the voltage value varies with the opening of the electronic throttle valve.
The driving signal is a pulse width PWM signal, and the size of the driving signal influences the time for which the valve plate is kept at the actual position where the movement stops. The first drive signal may be-10% PWM and the second drive signal may be 30% PWM.
In the above embodiment of the present invention, step 14 includes:
step 141, obtaining position signals of the valve plate for preset times;
step 142, reading the average value of the position signals for preset times;
and 143, when the difference value between the average value and the target position is larger than a first range, determining that the actual position of the motion stop is inconsistent with the target position, otherwise, determining that the actual position of the motion stop is consistent with the target position.
In this embodiment, when the electronic throttle valve plate is held at the stop position, the step of obtaining the position signal of the valve plate for a preset number of times is to sample the position signal, where the preset number of times may be 5 times, then calculate an average value of the position signal for 5 times, compare the average value with the target position, because the first range is 0-5%, that is, when a difference between the average value and the target position is greater than 5%, the actual position where the movement is stopped is considered to be inconsistent with the target position, otherwise, the actual position where the movement is stopped is considered to be consistent with the target position.
As shown in fig. 3, the electronic throttle control method further includes:
and step 15, if the working state of the electronic throttle valve is a mechanical top dead center self-learning state or a mechanical bottom dead center self-learning state, and the actual position of the movement stop is inconsistent with the target position, controlling the electronic throttle valve to execute a self-cleaning program.
In this embodiment, the reason that the actual position causing the motion stop is inconsistent with the target position may be damage to the electronic throttle valve, or may be caused by excessive carbon deposition of the electronic throttle valve, so that a self-cleaning program needs to be started to clean the carbon deposition, and inaccurate opening degree of the electronic throttle valve caused by the carbon deposition is avoided.
Specifically, the self-cleaning procedure is to control the electronic throttle valve plate to execute a cycle from a fully open position to a fully closed position for several times, which may be 5 cycles, and the process of the fully open and fully closed cycle is the self-cleaning process. When the valve plate moves to the full-open position or the full-close position and the distance is within a first range, the moving speed is lower than the first speed, and if the electronic throttle valve plate is stuck and cannot accurately move to the full-open position or the full-close position in the self-cleaning process, the fault indicator lamp is turned on.
In the above embodiment of the present invention, after step 15, the method further includes:
step 16, repeating the steps once to obtain a judgment result whether the actual position of the motion stop is consistent with the target position;
and step 17, if the judgment result is that the actual position of the movement stop is not consistent with the target position, controlling to light a fault lamp.
In the embodiment, after the self-cleaning program is finished, the ECU judges whether the actual position of the motion stop is consistent with the target position again, if the actual position of the motion stop is not consistent with the target position, the fact that the opening of the electronic throttle valve is not accurate and is not caused by carbon deposition and the valve plate of the electronic throttle valve is possibly damaged is proved, and a fault lamp is turned on to remind a driver, so that the occurrence of accidents caused by the fact that the control accuracy of an engine is influenced due to the inaccurate opening of the electronic throttle valve is avoided.
In the above embodiment of the present invention, the electronic throttle control method further includes:
and 18, if the working state of the electronic throttle valve is a partial opening state in the driving process and the actual position of the movement stop is inconsistent with the target position, sending a first driving signal to the electronic throttle valve and controlling to light a fault lamp.
In the embodiment, during driving, the ECU controls the opening of the electronic throttle according to a position signal of an accelerator pedal, and when the actual position of the valve plate of the electronic throttle, which stops moving, is inconsistent with the target position of the valve plate controlled by the ECU, the ECU sends a first driving signal of 10% PWM to the electronic throttle to help a spring to open the valve plate to the specified target position, and meanwhile, a fault indicator lamp is lightened to remind a driver of the fault of the electronic throttle.
In the above embodiment of the present invention, the electronic throttle control method further includes:
step 19, if the working state of the electronic throttle valve is a partially opened state in the driving process and the actual position of the movement stop is consistent with the target position, judging whether the difference value between the average value and the target position is larger than a second range, wherein the second range is smaller than the first range;
step 20, if the difference value is larger than the second range, acquiring the current speed of the electronic throttle valve;
and 21, if the speed is less than the second speed, sending a third driving signal to the electronic throttle valve.
In this embodiment, during driving, if the actual position of the electronic throttle valve plate at which the movement is stopped is consistent with the target position of the ECU for controlling the movement of the valve plate, that is, the distance is less than 5%, it is considered that the electronic throttle valve can normally operate, and in order to prevent the electronic throttle valve plate from shaking and generating noise when the electronic throttle valve plate is stopped, a gain needs to be set for the driving signal.
The second range is 0-0.7%, the second speed is 0.3rad/s, namely when the distance between the electronic throttle valve plate and the target position is less than 5% and greater than 0.7%, and the speed is close to zero, the ECU sends a third driving signal to the electronic throttle valve to prevent noise.
Specifically, the third driving signal is the sum of the first driving signal and the gain signal;
wherein the gain signal is given by a formula
Figure BDA0001485750870000091
Calculating to obtain;
wherein the OFFSET is a gain value, R is a direct current motor resistance, KCIs the torque constant of the DC motor, CroFor spring initial load, N is the gear ratio.
As shown in fig. 4, an embodiment of the present invention also provides an electronic throttle control apparatus including:
the first obtaining module 41 is configured to obtain a distance between a current position of the electronic throttle valve plate and a target position in a process that the electronic throttle valve plate moves to the target position;
a first control module 42 for controlling a speed of movement of the electronic throttle valve plate to be less than a first speed when the distance reaches a first range;
the driving module 43 is used for sending a driving signal to the electronic throttle valve after the electronic throttle valve plate stops moving so that the electronic throttle valve plate is kept at the actual position where the movement stops;
a second obtaining module 44, configured to obtain a determination result whether the actual position where the movement is stopped is consistent with the target position.
In the embodiment, the electronic throttle control method is suitable for a diesel engine, and the electronic control unit ECU controls the opening of the electronic throttle according to an accelerator pedal position signal, so that the optimal torque output of the full range of the engine is realized. When the ECU controls the electronic throttle valve plate to move towards the target position, the position sensor acquires the position signal of the electronic throttle valve plate in real time, and the electronic throttle valve plate is controlled to move to a first range from the target position, wherein the moving speed is lower than the first speed. The valve plate is controlled to move at a lower speed when the valve plate is close to the target position, so that the valve plate of the electronic throttle valve is prevented from being damaged due to the fact that the valve plate moves at an excessively high speed. Wherein the first range is 0-5%; the first speed is 50 DEG/S, namely the movement speed of the electronic throttle valve plate is controlled to be less than 50 DEG/S when the electronic throttle valve plate moves to a distance less than 5% of the target position.
After the movement of the electronic throttle valve plate is stopped, the ECU sends a driving signal to the electronic throttle valve to enable the valve plate to be kept at the stop position, the actual position of the stop of the valve plate obtained by the position sensor is compared with the target position, whether the electronic throttle valve accurately moves to the target position is judged, whether the opening of the electronic throttle valve plate is accurate can be detected in time, whether the electronic throttle valve can normally work is judged, a driver is reminded through a fault indicator lamp, and the problem that the accuracy of engine control is influenced due to the inaccurate opening of the electronic throttle valve is avoided.
Specifically, as shown in fig. 5, the driving module 43 includes:
a first acquisition unit 431 for acquiring an operating state of the electronic throttle valve;
in the embodiment, the working state of the electronic throttle valve comprises a mechanical bottom dead center self-learning state when the ECU is electrified, a mechanical top dead center self-learning state when the ECU is electrified, and a state that the ECU controls the electronic throttle valve to be partially opened according to an accelerator pedal position signal during driving.
The first driving unit 432 is used for sending a first driving signal to the electronic throttle valve after the movement of the electronic throttle valve plate stops when the working state of the electronic throttle valve is a mechanical top dead center self-learning state or a partial opening state in the driving process; or
And the second driving unit 433 is configured to send a second driving signal to the electronic throttle valve after the valve plate of the electronic throttle valve stops moving when the working state of the electronic throttle valve is a mechanical bottom dead center self-learning state.
In this embodiment, the mechanical top dead center is a full open position of the electronic throttle, which may be 90%, and the corresponding voltage value is 4.5V; the mechanical bottom dead center is a full-closed position of the electronic throttle valve, and may be 15%, and the corresponding voltage value is 0.75V, and the voltage value varies with the opening of the electronic throttle valve.
The driving signal is a pulse width PWM signal, and the size of the driving signal influences the time for which the valve plate is kept at the actual position where the movement stops. The first drive signal may be-10% PWM and the second drive signal may be 30% PWM.
In the above embodiment of the present invention, the second obtaining module 44 includes:
a second obtaining unit 441, configured to obtain position signals of the valve plate for preset times;
a reading unit 442 for reading an average value of the position signals for a preset number of times;
a determining unit 443 configured to determine that the actual position of the movement stop does not coincide with the target position when the difference between the average value and the target position is greater than a first range, and otherwise determine that the actual position of the movement stop coincides with the target position.
In this embodiment, when the electronic throttle valve plate is held at the stop position, the step of obtaining the position signal of the valve plate for a preset number of times is to sample the position signal, where the preset number of times may be 5 times, then calculate an average value of the position signal for 5 times, compare the average value with the target position, because the first range is 0-5%, that is, when a difference between the average value and the target position is greater than 5%, the actual position where the movement is stopped is considered to be inconsistent with the target position, otherwise, the actual position where the movement is stopped is considered to be consistent with the target position.
As shown in fig. 6, the electronic throttle control apparatus further includes:
and the second control module 45 is configured to control the electronic throttle valve to execute a self-cleaning program if the working state of the electronic throttle valve is a mechanical top dead center self-learning state or a mechanical bottom dead center self-learning state, and the actual position where the movement is stopped is inconsistent with the target position.
In this embodiment, the reason that the actual position causing the motion stop is inconsistent with the target position may be damage to the electronic throttle valve, or may be caused by excessive carbon deposition of the electronic throttle valve, so that a self-cleaning program needs to be started to clean the carbon deposition, and inaccurate opening degree of the electronic throttle valve caused by the carbon deposition is avoided.
Specifically, the self-cleaning procedure is to control the electronic throttle valve plate to execute a cycle from a fully open position to a fully closed position for several times, which may be 5 cycles, and the process of the fully open and fully closed cycle is the self-cleaning process. When the valve plate moves to the full-open position or the full-close position and the distance is within a first range, the moving speed is lower than the first speed, and if the electronic throttle valve plate is stuck and cannot accurately move to the full-open position or the full-close position in the self-cleaning process, the fault indicator lamp is turned on.
In the above-described embodiment of the present invention, the electronic throttle control apparatus further includes:
a third obtaining module 46, configured to repeatedly obtain a determination result whether the actual position where the movement is stopped is consistent with the target position;
and the third control module 47 is configured to control to turn on the fault lamp if the determination result indicates that the actual position where the movement is stopped is not consistent with the target position.
In the embodiment, after the self-cleaning program is finished, the ECU judges whether the actual position of the motion stop is consistent with the target position again, if the actual position of the motion stop is not consistent with the target position, the fact that the opening of the electronic throttle valve is not accurate and is not caused by carbon deposition and the valve plate of the electronic throttle valve is possibly damaged is proved, and a fault lamp is turned on to remind a driver, so that the occurrence of accidents caused by the fact that the control accuracy of an engine is influenced due to the inaccurate opening of the electronic throttle valve is avoided.
In the above-described embodiment of the present invention, the electronic throttle control apparatus further includes:
and the fourth control module 48 is configured to send a first driving signal to the electronic throttle valve and control to light a fault lamp if the working state of the electronic throttle valve is a partially opened state in a driving process and the actual position where the movement is stopped is inconsistent with the target position.
In the embodiment, during driving, the ECU controls the opening of the electronic throttle according to a position signal of an accelerator pedal, and when the actual position of the valve plate of the electronic throttle, which stops moving, is inconsistent with the target position of the valve plate controlled by the ECU, the ECU sends a first driving signal of 10% PWM to the electronic throttle to help a spring to open the valve plate to the specified target position, and meanwhile, a fault indicator lamp is lightened to remind a driver of the fault of the electronic throttle.
In the above-described embodiment of the present invention, the electronic throttle control apparatus further includes:
a judging module 49, configured to, if the operating state of the electronic throttle is a partially opened state in a driving process, and the actual position where the movement is stopped is consistent with the target position, judge whether a difference between the average value and the target position is greater than a second range, where the second range is smaller than the first range;
a fourth obtaining module 50, configured to obtain a current speed of the electronic throttle if the difference is greater than the second range;
a fifth control module 51 to send a third drive signal to the electronic throttle if the rate is less than the second speed.
In this embodiment, during driving, if the actual position of the electronic throttle valve plate at which the movement is stopped is consistent with the target position of the ECU for controlling the movement of the valve plate, that is, the distance is less than 5%, it is considered that the electronic throttle valve can normally operate, and in order to prevent the electronic throttle valve plate from shaking and generating noise when the electronic throttle valve plate is stopped, a gain needs to be set for the driving signal.
The second range is 0-0.7%, the second speed is 0.3rad/s, namely when the distance between the electronic throttle valve plate and the target position is less than 5% and greater than 0.7%, and the speed is close to zero, the ECU sends a third driving signal to the electronic throttle valve to prevent noise.
Specifically, the third driving signal is the sum of the first driving signal and the gain signal;
wherein the gain signal is given by a formula
Figure BDA0001485750870000121
Calculating to obtain;
wherein the OFFSET is a gain value, R is a direct current motor resistance, KCIs the torque constant of the DC motor, CroFor spring initial load, N is the gear ratio.
It should be noted that the electronic throttle control device is a device corresponding to the individual recommendation method, and all the implementation manners in the method embodiments are applicable to the embodiment of the device, so that the same technical effects can be achieved.
Embodiments of the present invention also provide an automobile including the electronic throttle control apparatus described above.
In the embodiment, the automobile comprises a diesel engine, the electronic throttle valve is arranged between an intercooler and an air inlet manifold of the diesel engine, combustion efficiency is optimized and emission pollution is reduced by adjusting air inlet pressure difference, and driving comfort is improved by blocking air inlet to reduce vibration when the engine is shut down.
According to the embodiment of the invention, the electronic throttle control method avoids the valve plate from being damaged due to the fact that the valve plate moves too fast when the electronic throttle is close to the target position by controlling the movement speed of the valve plate; whether the electronic throttle valve can work normally or not is detected in time by judging the consistency of the actual position where the valve plate stops moving and the target position, and a driver is reminded through a fault indicating lamp, so that the influence on the accuracy of engine control caused by inaccurate opening of the electronic throttle valve is avoided.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims (17)

1. An electronic throttle control method characterized by comprising:
the method comprises the steps that in the process that an electronic throttle valve plate moves to a target position, the distance between the current position of the electronic throttle valve plate and the target position is obtained;
controlling the movement speed of the electronic throttle valve plate to be smaller than a first speed when the distance reaches a first range;
after the electronic throttle valve plate stops moving, sending a driving signal to the electronic throttle valve to enable the electronic throttle valve plate to be kept at the actual position where the movement stops;
and obtaining a judgment result whether the actual position of the movement stop is consistent with the target position.
2. The electronic throttle valve control method according to claim 1, wherein the step of sending a drive signal to the electronic throttle valve after the movement of the electronic throttle valve plate is stopped to keep the electronic throttle valve plate at the actual position where the movement is stopped includes:
obtaining the working state of the electronic throttle valve;
when the working state of the electronic throttle valve is a mechanical top dead center self-learning state or a partial opening state in the driving process, sending a first driving signal to the electronic throttle valve after the movement of a valve plate of the electronic throttle valve stops; or,
when the working state of the electronic throttle valve is a mechanical bottom dead center self-learning state, a second driving signal is sent to the electronic throttle valve after the movement of the valve plate of the electronic throttle valve is stopped;
the driving signal is a pulse width PWM signal, and the size of the driving signal influences the time for which the valve plate is kept at the actual position where the movement stops; the first drive signal is-10% PWM and the second drive signal is 30% PWM.
3. The electronic throttle control method according to claim 2, wherein the obtaining a determination result of whether the actual position at which the movement is stopped coincides with the target position includes:
acquiring position signals of the valve plate for preset times;
reading the average value of the position signals for preset times;
and when the difference value between the average value and the target position is larger than a first range, determining that the actual position of the motion stop is inconsistent with the target position, otherwise, determining that the actual position of the motion stop is consistent with the target position.
4. The electronic throttle control method according to claim 3, characterized by further comprising:
and if the working state of the electronic throttle valve is a mechanical top dead center self-learning state or a mechanical bottom dead center self-learning state, and the actual position of the movement stop is inconsistent with the target position, controlling the electronic throttle valve to execute a self-cleaning program.
5. The electronic throttle control method according to claim 4, wherein the step of controlling the electronic throttle valve to execute a self-cleaning routine further comprises:
repeatedly obtaining a judgment result whether the actual position of the movement stop is consistent with the target position or not;
and if the judgment result is that the actual position of the movement stop is not consistent with the target position, controlling to light a fault lamp.
6. The electronic throttle control method according to claim 3, characterized by further comprising:
and if the working state of the electronic throttle valve is a partial opening state in the driving process and the actual position of the movement stop is inconsistent with the target position, sending a first driving signal to the electronic throttle valve and controlling to light a fault lamp.
7. The electronic throttle control method according to claim 3, characterized by further comprising:
if the working state of the electronic throttle valve is a partial opening state in the driving process and the actual position of the movement stop is consistent with the target position, judging whether the difference value between the average value and the target position is larger than a second range, wherein the second range is smaller than the first range;
if the difference value is larger than the second range, acquiring the current speed of the electronic throttle valve;
and if the speed is less than the second speed, sending a third driving signal to the electronic throttle valve.
8. The electronic throttle control method according to claim 7, characterized in that the third drive signal is a sum of the first drive signal and a gain signal;
wherein the gain signal is given by a formula
Figure FDA0002269824440000021
Calculating to obtain;
wherein the OFFSET is a gain value, R is a direct current motor resistance, KCIs the torque constant of the DC motor, CroFor spring initial load, N is the gear ratio.
9. An electronic throttle control device, characterized by comprising:
the first acquisition module is used for acquiring the distance between the current position of the electronic throttle valve plate and a target position in the process that the electronic throttle valve plate moves to the target position;
the first control module is used for controlling the movement speed of the electronic throttle valve plate to be smaller than a first speed when the distance reaches a first range;
the driving module is used for sending a driving signal to the electronic throttle valve after the electronic throttle valve plate stops moving so as to keep the electronic throttle valve plate at the actual position where the movement stops;
and the second acquisition module is used for acquiring a judgment result whether the actual position of the movement stop is consistent with the target position.
10. The electronic throttle control apparatus of claim 9, wherein the drive module comprises:
a first acquisition unit for acquiring an operating state of the electronic throttle valve;
the first driving unit is used for sending a first driving signal to the electronic throttle valve after the valve plate of the electronic throttle valve stops moving when the working state of the electronic throttle valve is a mechanical top dead center self-learning state or a partial opening state in the driving process; or,
the second driving unit is used for sending a second driving signal to the electronic throttle valve after the valve plate of the electronic throttle valve stops moving when the working state of the electronic throttle valve is a mechanical bottom dead center self-learning state;
the driving signal is a pulse width PWM signal, and the size of the driving signal influences the time for which the valve plate is kept at the actual position where the movement stops; the first drive signal is-10% PWM and the second drive signal is 30% PWM.
11. The electronic throttle control apparatus of claim 10, wherein the second acquisition module comprises:
the second acquisition unit is used for acquiring position signals of the valve plate for preset times;
a reading unit for reading an average value of the position signals for a preset number of times;
and the determining unit is used for determining that the actual position of the motion stop is inconsistent with the target position when the difference value between the average value and the target position is larger than a first range, otherwise, determining that the actual position of the motion stop is consistent with the target position.
12. The electronic throttle control apparatus according to claim 11, further comprising:
and the second control module is used for controlling the electronic throttle valve to execute a self-cleaning program if the working state of the electronic throttle valve is a mechanical top dead center self-learning state or a mechanical bottom dead center self-learning state and the actual position of the motion stop is inconsistent with the target position.
13. The electronic throttle control apparatus according to claim 12, further comprising:
the third acquisition module is used for repeatedly acquiring a judgment result whether the actual position of the movement stop is consistent with the target position or not;
and the third control module is used for controlling to light a fault lamp if the judgment result shows that the actual position of the movement stop is inconsistent with the target position.
14. The electronic throttle control apparatus according to claim 11, further comprising:
and the fourth control module is used for sending a first driving signal to the electronic throttle valve and controlling to light a fault lamp if the working state of the electronic throttle valve is a partial opening state in the driving process and the actual position of the movement stop is inconsistent with the target position.
15. The electronic throttle control apparatus according to claim 11, further comprising:
the judging module is used for judging whether the difference value between the average value and the target position is larger than a second range or not if the working state of the electronic throttle valve is a partial opening state in the driving process and the actual position of the movement stop is consistent with the target position, and the second range is smaller than the first range;
the fourth obtaining module is used for obtaining the current speed of the electronic throttle valve if the difference value is larger than the second range;
and the fifth control module is used for sending a third driving signal to the electronic throttle valve if the speed is less than the second speed.
16. The electronic throttle control apparatus according to claim 15, wherein the third drive signal is a sum of the first drive signal and a gain signal;
wherein the gain signal is given by a formula
Figure FDA0002269824440000041
Calculating to obtain;
wherein the OFFSET is a gain value, R is a direct current motor resistance, KCIs the torque constant of the DC motor, CroFor spring initial load, N is the gear ratio.
17. An automobile comprising the electronic throttle control apparatus according to any one of claims 9 to 16.
CN201711217147.6A 2017-11-28 2017-11-28 Electronic throttle control method and device and automobile Expired - Fee Related CN108005796B (en)

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CN112648062B (en) * 2019-10-10 2021-09-14 广州汽车集团股份有限公司 Self-learning method of temperature control module for automobile
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
CN113982766A (en) * 2021-09-30 2022-01-28 东风商用车有限公司 Engine electronic throttle control method and system and automobile
CN115217647A (en) * 2021-11-08 2022-10-21 广州汽车集团股份有限公司 Control method of exhaust gas recirculation valve

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