CN-122009133-A - Vehicle parking control method and device

CN122009133ACN 122009133 ACN122009133 ACN 122009133ACN-122009133-A

Abstract

The application discloses a vehicle parking control method and device, which relate to the technical field of vehicle control, and are characterized in that when the current state of a vehicle meets the preset state condition based on the current state information of the vehicle obtained in real time, a front wheel braking unit, an EPB actuator and a gearbox control unit are driven simultaneously, the front wheel braking unit is driven, so that a liquid inlet valve and a liquid return valve of the front wheel braking unit are kept at preset positions, and a hydraulic pump is started according to preset frequency; the motor is driven by the EPB actuator to perform parking braking on the rear wheels of the vehicle, and the gearbox control unit is driven to control the P-gear locking mechanism in the gearbox to be in an engaged state. The parking capacity of the vehicle under the working condition of a large ramp is enhanced through software logic optimization on the premise of not increasing hardware cost, and the vehicle is effectively prevented from sliding down the ramp.

Inventors

LIU LEI
CHE CHENG
MENG LINGYUN
WANG ZHAOGUO
Mu chi

Assignees

奇瑞汽车股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260331

Claims (10)

1. A vehicle parking control method, characterized by comprising: Acquiring current state information of a vehicle in real time; When the current state of the vehicle meets the preset state condition based on the current state information of the vehicle, a front wheel braking unit, an EPB actuator and a gearbox control unit are driven simultaneously, wherein the front wheel braking unit is driven to enable a liquid inlet valve and a liquid return valve of the front wheel braking unit to be kept at preset positions, a hydraulic pump is started according to preset frequency, the EPB actuator is driven to enable an EPB actuator driving motor to carry out parking braking on rear wheels of the vehicle, and the gearbox control unit is driven to control a P-gear locking mechanism in the gearbox to be in an engaged state.
2. The vehicle parking method according to claim 1, wherein the vehicle current state information includes at least a vehicle current wheel speed, a master cylinder current pressure, a brake pad current thickness, a slope on which the vehicle is currently located, information indicating whether the vehicle is currently in a non-flameout state, a vehicle battery current voltage, a current gear, and an EPB current on-off state.
3. The vehicle parking control method according to claim 2, characterized by further comprising, after the obtaining of the current state information of the vehicle: judging whether the current wheel speed of the vehicle is 0 in a preset time period or not; Judging whether the current pressure of the master cylinder is larger than a preset pressure threshold value or not; Judging whether the current thickness of the brake pad is larger than a preset thickness threshold value or not; Judging whether the gradient of the current ramp where the vehicle is located is larger than a preset ramp gradient threshold value or not; judging whether the vehicle is in a non-flameout state currently or not; Judging whether the current voltage of the vehicle storage battery is larger than a preset voltage threshold value or not; judging whether the current gear is a P gear or not; the method for simultaneously driving the front wheel brake unit, the EPB actuator and the gearbox control unit when the current state of the vehicle meets the preset state condition based on the current state information of the vehicle comprises the following steps: And when the current wheel speed of the vehicle is determined to be 0 in a preset time period, the current pressure of the master cylinder is greater than a preset pressure threshold value, the current thickness of the brake pad is greater than a preset thickness threshold value, the gradient of a slope where the vehicle is currently located is greater than a preset gradient threshold value, the vehicle is in a non-flameout state currently, the current voltage of the storage battery of the vehicle is greater than a preset voltage threshold value, and the current gear is a P gear, simultaneously driving a front wheel brake unit, an EPB actuator and a gearbox control unit.
4. The vehicle parking control method according to claim 3, characterized by further comprising, after said determining whether the current thickness of the brake pad is greater than a preset thickness threshold: and when the current thickness of the brake pad is not larger than the preset thickness threshold value, a brake pad abrasion alarm lamp is lightened on an instrument panel.
5. The vehicle parking control method according to claim 3, characterized by further comprising, after said determining whether a current grade of a hill on which the vehicle is located is greater than a preset grade threshold: and when the current grade of the vehicle is not greater than the preset grade threshold value, only driving the EPB actuator and the gearbox control unit.
6. The vehicle parking method according to claim 1, characterized by further comprising, after said simultaneously driving the front wheel brake unit, the EPB actuator, and the transmission control unit upon determining that the current state of the vehicle satisfies a preset state condition based on the current state information of the vehicle: Displaying icon warning information, and/or displaying text warning information, and/or displaying voice warning information.
7. The vehicle parking method according to claim 1, characterized in that the driving the EPB actuator to cause the EPB actuator driving motor to perform parking braking on rear wheels of a vehicle includes: and driving the EPB actuator to enable the EPB actuator driving motor to carry out parking braking on the rear wheels of the vehicle through a stay rope or a caliper motor.
8. A vehicle parking control apparatus, characterized by comprising: The acquisition module is used for acquiring the current state information of the vehicle in real time; The driving module is used for driving the front wheel braking unit, the EPB actuator and the gearbox control unit simultaneously when the current state of the vehicle meets the preset state condition based on the current state information of the vehicle, wherein the front wheel braking unit is driven to enable a liquid inlet valve and a liquid return valve of the front wheel braking unit to be kept at preset positions, a hydraulic pump is started according to preset frequency, the EPB actuator is driven to enable the EPB actuator to drive a motor to carry out parking braking on the rear wheels of the vehicle, and the gearbox control unit is driven to control a P-gear locking mechanism in the gearbox to be in an engagement state.
9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the vehicle parking control method of any one of claims 1-7 when the computer program is executed.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by a processor, implements the vehicle parking control method according to any one of claims 1 to 7.

Description

Vehicle parking control method and device Technical Field The application relates to the technical field of vehicle control, in particular to a vehicle parking control method and device. Background In the related art, after a vehicle is engaged in a P gear, an ESP (electronic stability system for vehicle body, electronic Stability Program) immediately stops working, and the pressure of a brake cylinder disappears, so that the vehicle is braked only by means of a mechanical locking mechanism of a gearbox and an EPB (electronic handbrake, electronic Parking Brake). However, the strength design of the mechanical locking mechanism of the gearbox and the EPB cannot meet the bearing requirement of large-slope parking, the ESP system exits after the P gear is hung in, the front wheel braking pressure is relieved, the braking force is only provided by the rear wheel EPB, the vehicle is easy to slide, a multi-system cooperative control mechanism is lacked, and the whole braking force cannot be effectively improved by utilizing four-wheel braking. Disclosure of Invention In view of the above, the application provides a vehicle parking control method and device, which are used for solving the problem that in the prior art, a vehicle is easy to slip due to insufficient braking force during parking on a large slope. The aim of the application can be achieved by the following technical scheme: A first aspect of the present application provides a vehicle parking control method, including: Acquiring current state information of a vehicle in real time; When the current state of the vehicle meets the preset state condition based on the current state information of the vehicle, the front wheel braking unit, the EPB actuator and the gearbox control unit are driven simultaneously, wherein the front wheel braking unit is driven to enable a liquid inlet valve and a liquid return valve of the front wheel braking unit to be kept at preset positions, a hydraulic pump is started according to preset frequency, the EPB actuator is driven to enable an EPB actuator driving motor to conduct parking braking on the rear wheels of the vehicle, and the gearbox control unit is driven to control a P-gear locking mechanism in the gearbox to be in an engaged state. In an alternative embodiment, the vehicle current state information includes at least a current wheel speed of the vehicle, a current master cylinder pressure, a current brake pad thickness, a current grade of the vehicle, information indicating whether the vehicle is currently in a non-flameout state, a current voltage of a vehicle battery, a current gear, and an EPB current switch state. In an alternative embodiment, after obtaining the current state information of the vehicle, the method further includes: judging whether the current wheel speed of the vehicle is 0 in a preset time period or not; Judging whether the current pressure of the master cylinder is greater than a preset pressure threshold value or not; judging whether the current thickness of the brake pad is larger than a preset thickness or not; judging whether the gradient of the current ramp where the vehicle is located is larger than a preset ramp gradient threshold value or not; judging whether the vehicle is in a non-flameout state currently; judging whether the current voltage of the vehicle storage battery is larger than a preset voltage threshold value or not; Judging whether the current gear is a P gear or not; when it is determined that the current state of the vehicle satisfies the preset state condition based on the current state information of the vehicle, simultaneously driving the front wheel brake unit, the EPB actuator, and the transmission control unit, comprising: and when the current wheel speed of the vehicle is determined to be 0 in a preset time period, the current pressure of the master cylinder is greater than a preset pressure threshold value, the current thickness of the brake pad is greater than a preset thickness threshold value, the current slope gradient of the vehicle is greater than a preset slope gradient threshold value, the vehicle is in a non-flameout state currently, the current voltage of the vehicle storage battery is greater than a preset voltage threshold value, and the current gear is in a P gear, simultaneously driving the front wheel brake unit, the EPB actuator and the gearbox control unit. In an alternative embodiment, after determining whether the current thickness of the brake pad is greater than the preset thickness threshold, the method further includes: And when the current thickness of the brake pad is not larger than the preset thickness threshold value, a brake pad abrasion alarm lamp is lightened on an instrument panel. In an alternative embodiment, after determining whether the current grade of the vehicle is greater than the preset grade threshold, the method further includes: When it is determined that the current grade of the vehicle is not greater than the prese