CN114810863A - Clutch separation control method, device and equipment and readable storage medium - Google Patents

Clutch separation control method, device and equipment and readable storage medium Download PDF

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Publication number
CN114810863A
CN114810863A CN202210616020.6A CN202210616020A CN114810863A CN 114810863 A CN114810863 A CN 114810863A CN 202210616020 A CN202210616020 A CN 202210616020A CN 114810863 A CN114810863 A CN 114810863A
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CN
China
Prior art keywords
clutch
vehicle
braking
release control
emergency braking
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Granted
Application number
CN202210616020.6A
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Chinese (zh)
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CN114810863B (en
Inventor
肖雄
张雪秋
邓湘
金永镇
王凯
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Lantu Automobile Technology Co Ltd
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Lantu Automobile Technology Co Ltd
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Priority to CN202210616020.6A priority Critical patent/CN114810863B/en
Publication of CN114810863A publication Critical patent/CN114810863A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • F16D48/066—Control of fluid pressure, e.g. using an accumulator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/102—Actuator
    • F16D2500/1026—Hydraulic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/104—Clutch
    • F16D2500/10406—Clutch position
    • F16D2500/10437—Power Take Off clutch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/106—Engine
    • F16D2500/1066—Hybrid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/11—Application
    • F16D2500/1107—Vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/31—Signal inputs from the vehicle
    • F16D2500/3108—Vehicle speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/31—Signal inputs from the vehicle
    • F16D2500/3108—Vehicle speed
    • F16D2500/3112—Vehicle acceleration change rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/502—Relating the clutch
    • F16D2500/50293—Reduction of vibrations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/504—Relating the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/52—General
    • F16D2500/525—Improve response of control system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/702—Look-up tables
    • F16D2500/70205—Clutch actuator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
    • F16D2500/70402—Actuator parameters

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

The invention provides a clutch separation control method, a device, equipment and a readable storage medium. The method comprises the following steps: acquiring the braking deceleration of the vehicle and the vehicle speed after the brake pedal is pressed; when the vehicle speed is equal to or less than the vehicle speed corresponding to the separable state of the clutch, triggering a clutch separation instruction and detecting whether emergency braking occurs; if emergency braking occurs, the oil pump motor is controlled to rotate reversely at the rated rotating speed until the clutch is separated. According to the invention, after the emergency braking of the vehicle is detected, the motor of the oil pump is controlled to rotate reversely, so that the oil pump is supplied with oil to release pressure quickly, the clutch is separated quickly, the impact on a transmission system and an engine during the emergency braking can be reduced under the emergency braking, the durability of the product is improved, the clutch can be separated quickly under the working condition of the emergency braking without adding extra parts to the whole vehicle, and the problem that the clutch can not be separated quickly under the working condition of the emergency braking in the prior art is solved.

Description

Clutch separation control method, device and equipment and readable storage medium
Technical Field
The invention relates to the technical field of vehicle power transmission, in particular to a clutch separation control method, a clutch separation control device, clutch separation control equipment and a readable storage medium.
Background
Take hydraulic type traditional fuel vehicle or PHEV motorcycle type of new forms of energy (plug-in hybrid vehicle), under the emergency braking operating mode, especially when ABS plays a role, because the short-term locking of wheel speed in braking process, if the clutch separation is slower, probably the engine has been dragged below the idle speed by whole car in the in-process of separation, the engine does not possess the rotational speed of self-resuming oil spout after the clutch separation to lead to the engine to flame-out, consequently, urgent need for one under the emergency braking operating mode, can make the scheme that the clutch separates rapidly.
Disclosure of Invention
The invention mainly aims to provide a clutch separation control method, a device, equipment and a readable storage medium, and aims to solve the problem that the clutch cannot be rapidly separated under the emergency braking working condition in the prior art.
In a first aspect, the present invention provides a clutch release control method including:
acquiring the braking deceleration of the vehicle and the vehicle speed after the brake pedal is pressed;
when the vehicle speed is equal to or less than the vehicle speed corresponding to the separable state of the clutch, triggering a clutch separation instruction and detecting whether emergency braking occurs;
if emergency braking occurs, the oil pump motor is controlled to rotate reversely at the rated rotating speed until the clutch is separated.
Optionally, the step of detecting whether emergency braking occurs includes:
detecting whether the braking deceleration is greater than or equal to a preset value and/or whether an anti-lock braking system is activated;
if the braking deceleration is greater than or equal to a preset value and/or the anti-lock braking system is activated, it is determined that emergency braking occurs.
Optionally, after the step of detecting whether the braking deceleration is greater than or equal to a preset value and/or whether an anti-lock braking system is activated, the method includes:
and if the braking deceleration is smaller than a preset value and/or the anti-lock braking system is not activated, the oil pump motor is not controlled to rotate reversely.
Optionally, the vehicle is a conventional fuel vehicle with an automatic transmission with a clutch or a new energy plug-in hybrid electric vehicle.
Optionally, before the step of obtaining the braking deceleration of the vehicle and the vehicle speed of the vehicle after the brake pedal is depressed, the method includes:
the vehicle is in a normal driving state and the clutch is in an engaged state.
In a second aspect, the present invention also provides a clutch release control apparatus including:
the acquisition module is used for acquiring the braking deceleration of the vehicle and the speed of the vehicle after the brake pedal is stepped;
the detection module is used for triggering a clutch separation instruction and detecting whether emergency braking occurs or not when the vehicle speed is equal to or less than the vehicle speed corresponding to the clutch separation state;
and the control module is used for controlling the oil pump motor to rotate reversely at the rated rotating speed until the clutch is separated if emergency braking occurs.
Optionally, the detection module is configured to:
detecting whether the braking deceleration is greater than or equal to a preset value and/or whether an anti-lock braking system is activated;
if the braking deceleration is greater than or equal to a preset value and/or the anti-lock braking system is activated, it is determined that emergency braking occurs.
Optionally, the detection module is further configured to:
and if the braking deceleration is smaller than a preset value and/or the anti-lock braking system is not activated, the oil pump motor is not controlled to rotate reversely.
In a third aspect, the present invention also provides a clutch release control apparatus comprising a processor, a memory, and a clutch release control program stored on the memory and executable by the processor, wherein the clutch release control program, when executed by the processor, implements the steps of the clutch release control method as described above.
In a fourth aspect, the present invention further provides a readable storage medium, on which a clutch release control program is stored, wherein the clutch release control program, when executed by a processor, implements the steps of the clutch release control method as described above.
According to the invention, the braking deceleration of the vehicle and the vehicle speed after the brake pedal is stepped are obtained; when the vehicle speed is equal to or less than the vehicle speed corresponding to the separable state of the clutch, triggering a clutch separation instruction and detecting whether emergency braking occurs; if emergency braking occurs, the oil pump motor is controlled to rotate reversely at the rated rotating speed until the clutch is separated. According to the invention, after the emergency braking of the vehicle is detected, the motor of the oil pump is controlled to rotate reversely, so that the oil pump is supplied with oil to release pressure quickly, the clutch is separated quickly, the impact on a transmission system and an engine during the emergency braking can be reduced under the emergency braking, the durability of the product is improved, the clutch can be separated quickly under the working condition of the emergency braking without adding extra parts to the whole vehicle, and the problem that the clutch can not be separated quickly under the working condition of the emergency braking in the prior art is solved.
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 hardware configuration diagram of a clutch release control apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a clutch disengagement control method of the present invention;
FIG. 3 is a schematic flow chart of a clutch disengagement control method according to a second embodiment of the present invention;
FIG. 4 is a schematic flow chart of a clutch disengagement control method according to a third embodiment of the present invention;
FIG. 5 is a functional block diagram of an embodiment of a clutch release control apparatus according to the present invention.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In a first aspect, embodiments of the present invention provide a clutch release control apparatus.
Referring to fig. 1, fig. 1 is a hardware configuration diagram of a clutch release control apparatus according to an embodiment of the present invention. In an embodiment of the present invention, the clutch release control device may include a processor 1001 (e.g., a central processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used for realizing connection communication among the components; the user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard); the network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WI-FI interface, WI-FI interface); the memory 1005 may be a Random Access Memory (RAM) or a non-volatile memory (non-volatile memory), such as a magnetic disk memory, and the memory 1005 may optionally be a storage device independent of the processor 1001. Those skilled in the art will appreciate that the hardware configuration depicted in FIG. 1 is not intended to be limiting of the present invention, and may include more or less components than those shown, or some components in combination, or a different arrangement of components.
With continued reference to fig. 1, the memory 1005 of fig. 1, which is one type of computer storage medium, may include an operating system, a network communication module, a user interface module, and a clutch release control program therein.
The processor 1001 may call a clutch release control program stored in the memory 1005, and execute the following steps:
acquiring the braking deceleration of the vehicle and the vehicle speed after the brake pedal is pressed;
when the vehicle speed is equal to or less than the vehicle speed corresponding to the separable state of the clutch, triggering a clutch separation instruction and detecting whether emergency braking occurs;
if emergency braking occurs, the oil pump motor is controlled to rotate reversely at a rated rotating speed until the clutch is separated.
Further, in one embodiment, the processor 1001 may call a clutch release control program stored in the memory 1005, and further perform the following steps:
detecting whether the braking deceleration is greater than or equal to a preset value and/or whether an anti-lock braking system is activated;
if the braking deceleration is greater than or equal to a preset value and/or the anti-lock braking system is activated, it is determined that emergency braking occurs.
Further, in one embodiment, the processor 1001 may call a clutch release control program stored in the memory 1005, and further perform the following steps:
and if the braking deceleration is smaller than a preset value and/or the anti-lock braking system is not activated, the oil pump motor is not controlled to rotate reversely.
Further, in one embodiment, the vehicle is a conventional fuel vehicle with a clutch automatic transmission or a new energy plug-in hybrid vehicle.
Further, in one embodiment, the vehicle is in a normal driving state and the clutch is in an engaged state.
In a second aspect, an embodiment of the present invention provides a clutch release control method.
In an embodiment, referring to fig. 2, fig. 2 is a flowchart illustrating a clutch release control method according to a first embodiment of the present invention. As shown in fig. 2, the clutch release control method includes:
step S10, obtaining the braking deceleration of the vehicle and the vehicle speed after the brake pedal is pressed;
in the present embodiment, after the brake pedal is depressed, the vehicle is in a deceleration running state, and the braking deceleration of the vehicle and the vehicle speed of the vehicle are acquired.
Step S20, when the vehicle speed is equal to or less than the vehicle speed corresponding to the clutch separating state, the clutch separating instruction is triggered and whether emergency braking occurs is detected;
in the present embodiment, when the vehicle speed of the vehicle is decelerated to a vehicle speed corresponding to the clutch-disengageable state, that is, when the vehicle speed is equal to or less than the vehicle speed corresponding to the clutch-disengageable state, a clutch disengagement command is triggered, the clutch starts to be disengaged, and whether the vehicle is suddenly braked is detected by the automatic Transmission Control Unit (TCU).
Further, when the vehicle speed is greater than the vehicle speed corresponding to the clutch-disengaged state, the clutch-disengagement command is not triggered.
Further, in an embodiment, the step of detecting whether emergency braking occurs includes:
step S201, detecting whether the braking deceleration is larger than or equal to a preset value and/or whether an anti-lock braking system is activated;
in step S202, if the braking deceleration is greater than or equal to a preset value and/or the anti-lock brake system is activated, it is determined that emergency braking occurs.
In this embodiment, referring to fig. 3, fig. 3 is a flowchart illustrating a clutch release control method according to a second embodiment of the present invention. As shown in fig. 3, the braking deceleration of the vehicle and the vehicle speed after the brake pedal is pressed are obtained, and when the vehicle speed is equal to or less than the vehicle speed corresponding to the clutch-separable state, a clutch-separable command is triggered and whether the braking deceleration is greater than or equal to a preset value and/or whether the anti-lock braking system is activated is detected. The braking deceleration, which is the deceleration of the automobile during braking, directly reflects the magnitude of the braking force for decelerating the automobile, and obviously, the larger the braking deceleration, the larger the braking force, and the shorter the braking distance, so that when the braking deceleration is detected to be greater than or equal to the preset value, it is determined that the emergency braking of the automobile occurs.
An ABS (Anti-lock braking System) Anti-lock braking System sends a signal that a wheel is locked through a sensor arranged on the wheel, a controller instructs a regulator to reduce the oil pressure of a wheel brake cylinder, reduces braking torque, recovers the original oil pressure after a certain time, and continuously circulates in the way (5-10 times per second) to always enable the wheel to be in a rotating state and have the maximum braking torque. The automobile without the ABS is not provided with the ABS, the rotating speed of the wheel can be rapidly reduced if the brake pedal is pressed down with force during running, when the braking force exceeds the friction force between the wheel and the ground, the wheel can be locked, the friction force between the tire and the ground can be reduced by the completely locked wheel, if the front wheel is locked, a driver cannot control the running direction of the automobile, and if the rear wheel is locked, the sideslip phenomenon is easy to occur. When an emergency situation is encountered, an anti-lock brake system (ABS) is activated only if a brake pedal is fully depressed, and thus, when it is detected that the ABS is activated, it is determined that emergency braking of the vehicle occurs.
And after the emergency braking of the vehicle is determined, controlling the oil pump motor to rotate reversely at the rated rotating speed until the clutch is separated.
Further, in an embodiment, after the step of detecting whether the braking deceleration is greater than or equal to a preset value and/or whether the anti-lock braking system is activated, the method includes:
and if the braking deceleration is smaller than a preset value and/or the anti-lock braking system is not activated, the oil pump motor is not controlled to rotate reversely.
In this embodiment, if the braking deceleration is smaller than the preset value, it indicates that the braking force is small, the braking distance is long, and the vehicle is not emergently braked. Specifically, if the preset value is 3m/s 2 If the braking deceleration is 0.5m/s 2 If the initial speed of the vehicle is 15m/s, the vehicle can stop within 30s at a distance of 15 m; if the braking deceleration is 5m/s 2 If the initial speed of the vehicle is 15m/s, it means that the vehicle stops when the distance of 15m is 3 seconds. As is well known, the braking time period during which the vehicle is emergently braked is shorter than the braking time period during which the vehicle is not emergently braked, so that whether the vehicle is emergently braked can be determined according to the magnitude of the braking deceleration. That is, when the braking deceleration is greater than or equal to the preset value, it is determined that emergency braking occurs in the vehicle, and when the braking deceleration is less than the preset value, it is determined that emergency braking does not occur in the vehicle. For example, the braking deceleration is 5m/s 2 When the braking deceleration is 5m/s 2 Greater than the preset value of 3m/s 2 At this time, the occurrence of the vehicle is determinedEmergency braking with a deceleration of 0.5m/s 2 When the brake deceleration is 0.5m/s 2 Less than the preset value of 3m/s 2 At this time, it is determined that the emergency braking of the vehicle has not occurred. It is to be understood that the parameters in the present embodiment are only for reference and are not limited thereto.
If the braking deceleration is smaller than the preset value and/or the anti-lock braking system is not activated, the oil pump motor is not controlled to rotate reversely, namely, when the fact that the vehicle is not subjected to emergency braking is detected, the oil pump is not rapidly decompressed, and the clutch is not rapidly separated.
And step S30, if emergency braking occurs, controlling the oil pump motor to rotate reversely at the rated rotation speed until the clutch is separated.
In this embodiment, if the braking deceleration is greater than or equal to the preset value and/or the anti-lock braking system is activated, and it is determined that the vehicle is emergently braked, the automatic Transmission Control Unit (TCU) controls the oil pump motor to rotate reversely at the rated rotation speed, so as to allow the oil pump to quickly release pressure, and thus the clutch is quickly disengaged. And when the clutch is detected to be separated through an automatic Transmission Control Unit (TCU), controlling the oil pump motor to stop rotating.
In the embodiment, the braking deceleration of the vehicle and the vehicle speed after the brake pedal is pressed are obtained; when the vehicle speed is equal to or less than the vehicle speed corresponding to the separable state of the clutch, triggering a clutch separation instruction and detecting whether emergency braking occurs; if emergency braking occurs, the oil pump motor is controlled to rotate reversely at the rated rotating speed until the clutch is separated. Through this embodiment, after detecting the emergency braking of vehicle emergence, control oil pump motor reversal to the fuel feed pump releases pressure rapidly, make the clutch separate rapidly, under the emergency braking, the impact that transmission system and engine received when can reducing emergency braking, improve product durability, and whole car does not have the increase of extra spare part, can be under the emergency braking operating mode, make the clutch separate rapidly, solved among the prior art unable under the emergency braking operating mode, make the problem that the clutch separated rapidly.
Further, in one embodiment, the vehicle is a conventional fuel vehicle with a clutch automatic transmission or a new energy plug-in hybrid vehicle.
In the embodiment, the traditional clutches are divided into two types, namely a pull wire type automatic clutch and a hydraulic type automatic clutch, and the automatic clutches are also divided into two types, namely a mechanical motor type automatic clutch and a hydraulic type automatic clutch. An ECU of the mechanical motor type automatic clutch collects signals of an accelerator pedal, an engine speed sensor, a vehicle speed sensor and the like, sends an instruction to drive a servo motor after processing, and drives the clutch to act through mechanical forms such as a pull rod and the like; the hydraulic automatic clutch is driven by an electric hydraulic system through a signal sent by an ECU, and the clutch is operated through hydraulic pressure. Because the automatic clutch is an independent system which mainly realizes the separation and combination of the automatic control clutch through mechanical, electronic and hydraulic pressure, and the hydraulic automatic clutch is additionally provided with an Electronic Control Unit (ECU) and a hydraulic execution system on the basis of a universal diaphragm clutch, the pedal-operated clutch cylinder piston is changed into an electric oil pump controlled by a switch device to operate the clutch cylinder piston. When the scheme detects that the vehicle is in an emergency braking working condition, the motor of the oil pump is controlled to rotate reversely, so that the oil pump releases pressure rapidly, and the clutch is separated rapidly. The traditional fuel vehicle with the automatic gearbox with the clutch or the new energy plug-in hybrid electric vehicle is the hydraulic automatic clutch, so that the scheme is suitable for the traditional fuel vehicle with the automatic gearbox with the clutch or the new energy plug-in hybrid electric vehicle.
Further, in an embodiment, before step S10, the method includes:
in step S01, the vehicle is in a normal running state and the clutch is in an engaged state.
In this embodiment, referring to fig. 4, fig. 4 is a flowchart illustrating a clutch release control method according to a third embodiment of the present invention. As shown in fig. 4, when the brake pedal is depressed, the engine speed is low to a certain speed, it is necessary to resume the fuel injection ignition and the clutch release operation, and therefore, the vehicle should be in a normal running state and the clutch should be in an engaged state before the step of acquiring the braking deceleration of the vehicle and the vehicle speed of the vehicle after the brake pedal is depressed is performed. During the normal running process of the vehicle, the clutch is combined, after the throttle is released, the whole vehicle inertia drags the engine to run, and at the moment, the engine can cut off the oil reasonably.
In a third aspect, an embodiment of the present invention further provides a clutch release control apparatus.
In an embodiment, referring to fig. 5, fig. 5 is a functional block diagram of an embodiment of a clutch release control apparatus according to the present invention. As shown in fig. 5, the clutch release control apparatus includes:
the obtaining module 10 is used for obtaining the braking deceleration of the vehicle and the vehicle speed of the vehicle after the brake pedal is pressed;
in the present embodiment, after the brake pedal is depressed, the vehicle is in a deceleration running state, and the braking deceleration of the vehicle and the vehicle speed of the vehicle are acquired.
The detection module 20 is used for triggering a clutch separation instruction and detecting whether emergency braking occurs or not when the vehicle speed is equal to or less than the vehicle speed corresponding to the clutch separation state;
in the present embodiment, when the vehicle speed of the vehicle is decelerated to a vehicle speed corresponding to the clutch-disengageable state, that is, when the vehicle speed is equal to or less than the vehicle speed corresponding to the clutch-disengageable state, a clutch disengagement command is triggered, the clutch starts to be disengaged, and whether the vehicle is suddenly braked is detected by the automatic Transmission Control Unit (TCU).
Further, when the vehicle speed is greater than the vehicle speed corresponding to the clutch-disengaged state, the clutch-disengagement command is not triggered.
And the control module 30 is used for controlling the oil pump motor to rotate reversely at the rated rotating speed until the clutch is separated if emergency braking occurs.
In this embodiment, if the braking deceleration is greater than or equal to the preset value and/or the anti-lock braking system is activated, and it is determined that the vehicle is emergently braked, the automatic Transmission Control Unit (TCU) controls the oil pump motor to rotate reversely at the rated rotation speed, so as to allow the oil pump to quickly release pressure, and thus the clutch is quickly disengaged. And when the clutch is detected to be separated through an automatic Transmission Control Unit (TCU), controlling the oil pump motor to stop rotating.
Further, in an embodiment, the detecting module 20 is further configured to:
detecting whether the braking deceleration is greater than or equal to a preset value and/or whether an anti-lock braking system is activated;
if the braking deceleration is greater than or equal to a preset value and/or the anti-lock braking system is activated, it is determined that emergency braking occurs.
In the present embodiment, with continued reference to fig. 3, the braking deceleration of the vehicle and the vehicle speed after the brake pedal is depressed are obtained, and when the vehicle speed is equal to or less than the vehicle speed corresponding to the clutch-disengaged state, the clutch-disengaged command is triggered and it is detected whether the braking deceleration is greater than or equal to a preset value and/or the anti-lock braking system is activated. The braking deceleration, which is the deceleration of the automobile during braking, directly reflects the magnitude of the braking force for decelerating the automobile, and obviously, the larger the braking deceleration, the larger the braking force, and the shorter the braking distance, so that when the braking deceleration is detected to be greater than or equal to the preset value, it is determined that the emergency braking of the automobile occurs.
An ABS (Anti-lock braking System) Anti-lock braking System sends a signal that a wheel is locked through a sensor arranged on the wheel, a controller instructs a regulator to reduce the oil pressure of a wheel brake cylinder, reduces braking torque, recovers the original oil pressure after a certain time, and continuously circulates in the way (5-10 times per second) to always enable the wheel to be in a rotating state and have the maximum braking torque. The automobile without the ABS is not provided with the ABS, the rotating speed of the wheel can be rapidly reduced if the brake pedal is pressed down with force during running, when the braking force exceeds the friction force between the wheel and the ground, the wheel can be locked, the friction force between the tire and the ground can be reduced by the completely locked wheel, if the front wheel is locked, a driver cannot control the running direction of the automobile, and if the rear wheel is locked, the sideslip phenomenon is easy to occur. When an emergency situation is encountered, an anti-lock brake system (ABS) is activated only if a brake pedal is fully depressed, and thus, when it is detected that the ABS is activated, it is determined that emergency braking of the vehicle occurs.
And after the emergency braking of the vehicle is determined, controlling the oil pump motor to rotate reversely at the rated rotating speed until the clutch is separated.
Further, in an embodiment, the control module 30 is further configured to:
and if the braking deceleration is smaller than a preset value and/or the anti-lock braking system is not activated, the oil pump motor is not controlled to rotate reversely.
In this embodiment, if the braking deceleration is smaller than the preset value, it indicates that the braking force is small, the braking distance is long, and the vehicle is not emergently braked. Specifically, if the preset value is 3m/s 2 If the braking deceleration is 0.5m/s 2 If the initial speed of the vehicle is 15m/s, the vehicle can stop within 30s at a distance of 15 m; if the braking deceleration is 5m/s 2 If the initial speed of the vehicle is 15m/s, it means that the vehicle stops when the distance of 15m is 3 seconds. As is well known, the braking duration during which the vehicle is braked emergently is shorter than the braking duration during which the vehicle is not braked emergently, so that whether the vehicle is braked emergently can be determined according to the magnitude of the braking deceleration. That is, when the braking deceleration is greater than or equal to the preset value, it is determined that emergency braking occurs in the vehicle, and when the braking deceleration is less than the preset value, it is determined that emergency braking does not occur in the vehicle. For example, the braking deceleration is 5m/s 2 When the braking deceleration is 5m/s 2 Greater than the preset value of 3m/s 2 At this time, it is determined that the vehicle is suddenly braked and the braking deceleration is 0.5m/s 2 When the braking deceleration is 0.5m/s 2 Less than the preset value of 3m/s 2 At this time, it is determined that the emergency braking of the vehicle has not occurred. It is to be understood that the parameters in the present embodiment are only for reference and are not limited thereto.
If the braking deceleration is smaller than the preset value and/or the anti-lock braking system is not activated, the oil pump motor is not controlled to rotate reversely, namely, when the fact that the vehicle is not subjected to emergency braking is detected, the oil pump is not rapidly decompressed, and the clutch is not rapidly separated.
Further, in one embodiment, the vehicle is a conventional fuel vehicle with a clutch automatic transmission or a new energy plug-in hybrid vehicle.
In the embodiment, the traditional clutches are divided into two types, namely a pull wire type automatic clutch and a hydraulic type automatic clutch, and the automatic clutches are also divided into two types, namely a mechanical motor type automatic clutch and a hydraulic type automatic clutch. An ECU of the mechanical motor type automatic clutch collects signals of an accelerator pedal, an engine speed sensor, a vehicle speed sensor and the like, sends an instruction to drive a servo motor after processing, and drives the clutch to act through mechanical forms such as a pull rod and the like; the hydraulic automatic clutch is driven by an electric hydraulic system through a signal sent by an ECU, and the clutch is operated through hydraulic pressure. Because the automatic clutch is an independent system which mainly realizes the separation and combination of the automatic control clutch through mechanical, electronic and hydraulic pressure, and the hydraulic automatic clutch is additionally provided with an Electronic Control Unit (ECU) and a hydraulic execution system on the basis of a universal diaphragm clutch, the pedal-operated clutch cylinder piston is changed into an electric oil pump controlled by a switch device to operate the clutch cylinder piston. When the scheme detects that the vehicle is in an emergency braking working condition, the motor of the oil pump is controlled to rotate reversely, so that the oil pump releases pressure rapidly, and the clutch is separated rapidly. The traditional fuel vehicle with the automatic gearbox with the clutch or the new energy plug-in hybrid electric vehicle is the hydraulic automatic clutch, so that the scheme is suitable for the traditional fuel vehicle with the automatic gearbox with the clutch or the new energy plug-in hybrid electric vehicle.
Further, in one embodiment, the vehicle is in a normal driving state and the clutch is in an engaged state.
In the present embodiment, with continued reference to fig. 4, when the brake pedal is depressed, the engine speed is lowered to a certain speed, and it is necessary to resume the fuel injection ignition and the clutch disengagement operation, and therefore, the vehicle should be in the normal running state and the clutch should be in the engaged state before the step of acquiring the braking deceleration of the vehicle and the vehicle speed after the brake pedal is depressed is performed. During the normal running process of the vehicle, the clutch is combined, after the throttle is released, the whole vehicle inertia drags the engine to run, and at the moment, the engine can cut off the oil reasonably.
In the embodiment, the braking deceleration of the vehicle and the vehicle speed after the brake pedal is pressed are obtained; when the vehicle speed is equal to or less than the vehicle speed corresponding to the separable state of the clutch, triggering a clutch separation instruction and detecting whether emergency braking occurs; if emergency braking occurs, the oil pump motor is controlled to rotate reversely at the rated rotating speed until the clutch is separated. Through this embodiment, after detecting the emergency braking of vehicle emergence, control oil pump motor reversal to the fuel feed pump releases pressure rapidly, make the clutch separate rapidly, under the emergency braking, the impact that transmission system and engine received when can reducing emergency braking, improve product durability, and whole car does not have the increase of extra spare part, can be under the emergency braking operating mode, make the clutch separate rapidly, solved among the prior art unable under the emergency braking operating mode, make the problem that the clutch separated rapidly.
In a fourth aspect, the embodiment of the present invention further provides a readable storage medium.
The readable storage medium of the present invention stores a clutch release control program, wherein the clutch release control program, when executed by a processor, implements the steps of the clutch release control method as described above.
The method implemented when the clutch release control program is executed may refer to various embodiments of the clutch release control method of the present invention, and will not be described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for causing a terminal device to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A clutch release control method, characterized by comprising:
acquiring the braking deceleration of the vehicle and the vehicle speed after the brake pedal is pressed;
when the vehicle speed is equal to or less than the vehicle speed corresponding to the separable state of the clutch, triggering a clutch separation instruction and detecting whether emergency braking occurs;
if emergency braking occurs, the oil pump motor is controlled to rotate reversely at a rated rotating speed until the clutch is separated.
2. The clutch release control method according to claim 1, wherein the step of detecting whether emergency braking occurs includes:
detecting whether the braking deceleration is greater than or equal to a preset value and/or whether an anti-lock braking system is activated;
if the braking deceleration is greater than or equal to a preset value and/or the anti-lock braking system is activated, it is determined that emergency braking occurs.
3. The clutch release control method according to claim 2, characterized by, after the step of detecting whether the braking deceleration is greater than or equal to a preset value and/or whether an anti-lock brake system is activated, comprising:
and if the braking deceleration is smaller than a preset value and/or the anti-lock braking system is not activated, the oil pump motor is not controlled to reversely rotate.
4. The clutch release control method according to claim 1, wherein the vehicle is a conventional fuel vehicle with a clutch-equipped automatic transmission or a new energy plug-in hybrid vehicle.
5. The clutch release control method according to claim 1, characterized by comprising, before the step of acquiring the braking deceleration of the vehicle and the vehicle speed of the vehicle after the brake pedal is depressed:
the vehicle is in a normal driving state and the clutch is in an engaged state.
6. A clutch release control apparatus, characterized by comprising:
the acquisition module is used for acquiring the braking deceleration of the vehicle and the speed of the vehicle after the brake pedal is stepped;
the detection module is used for triggering a clutch separation instruction and detecting whether emergency braking occurs or not when the vehicle speed is equal to or less than the vehicle speed corresponding to the clutch separation state;
and the control module is used for controlling the oil pump motor to rotate reversely at the rated rotating speed until the clutch is separated if emergency braking occurs.
7. The clutch disengagement control apparatus of claim 6, wherein the detection module is configured to:
detecting whether the braking deceleration is greater than or equal to a preset value and/or whether an anti-lock braking system is activated;
if the braking deceleration is greater than or equal to a preset value and/or the anti-lock braking system is activated, it is determined that emergency braking occurs.
8. The clutch disengagement control apparatus of claim 6, wherein the detection module is further configured to:
and if the braking deceleration is smaller than a preset value and/or the anti-lock braking system is not activated, the oil pump motor is not controlled to rotate reversely.
9. A clutch release control apparatus, characterized in that the clutch release control apparatus includes a processor, a memory, and a clutch release control program stored on the memory and executable by the processor, wherein the clutch release control program, when executed by the processor, implements the steps of the clutch release control method according to any one of claims 1 to 5.
10. A readable storage medium, characterized in that a clutch release control program is stored thereon, wherein the clutch release control program, when executed by a processor, implements the steps of the clutch release control method according to any one of claims 1 to 5.
CN202210616020.6A 2022-05-31 2022-05-31 Clutch release control method, device, equipment and readable storage medium Active CN114810863B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202971863U (en) * 2012-11-23 2013-06-05 安徽江淮汽车股份有限公司 Manual gear car
CN104494430A (en) * 2014-11-28 2015-04-08 长城汽车股份有限公司 Control method and control system of manual vehicle, and manual vehicle
CN106050971A (en) * 2016-08-03 2016-10-26 天津市松正电动汽车技术股份有限公司 Electric hydraulic clutch
CN107618511A (en) * 2017-07-27 2018-01-23 宝沃汽车（中国）有限公司 Speed computational methods, system and the vehicle of electric automobile
CN108001434A (en) * 2017-12-28 2018-05-08 天津清智科技有限公司 A kind of automatic emergency brake system and control method
CN111005953A (en) * 2018-10-08 2020-04-14 通用汽车环球科技运作有限责任公司 Hydraulic clutch system for automatic emergency braking and remote start of manual transmission vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202971863U (en) * 2012-11-23 2013-06-05 安徽江淮汽车股份有限公司 Manual gear car
CN104494430A (en) * 2014-11-28 2015-04-08 长城汽车股份有限公司 Control method and control system of manual vehicle, and manual vehicle
CN106050971A (en) * 2016-08-03 2016-10-26 天津市松正电动汽车技术股份有限公司 Electric hydraulic clutch
CN107618511A (en) * 2017-07-27 2018-01-23 宝沃汽车（中国）有限公司 Speed computational methods, system and the vehicle of electric automobile
CN108001434A (en) * 2017-12-28 2018-05-08 天津清智科技有限公司 A kind of automatic emergency brake system and control method
CN111005953A (en) * 2018-10-08 2020-04-14 通用汽车环球科技运作有限责任公司 Hydraulic clutch system for automatic emergency braking and remote start of manual transmission vehicle

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