CN-121973741-A - Control method and device for vehicle and readable storage medium

CN121973741ACN 121973741 ACN121973741 ACN 121973741ACN-121973741-A

Abstract

The application discloses a control method and device of a vehicle and a readable storage medium, and relates to the technical field of automobile engineering. The control method of the vehicle comprises the steps of controlling the parking valve to be closed and controlling the emergency valve to be opened in the running process of the vehicle, detecting a first pressure value of an input end of the parking valve and a second pressure value of an output end of the parking valve, determining a difference value between the first pressure value and the second pressure value to obtain a pressure difference value, and controlling the parking valve to be kept closed and controlling the emergency valve to be closed under the condition that the pressure difference value is larger than or equal to a first pressure difference threshold value. The application improves the running reliability of the vehicle.

Inventors

LIU JIE
PENG GUOXI
SHI DEWEN
LIU XINYI

Assignees

湖北三江航天万山特种车辆有限公司
湖北航天技术研究院特种车辆技术中心

Dates

Publication Date: 20260505
Application Date: 20251229

Claims (10)

1. A control method of a vehicle, characterized in that the vehicle includes a parking brake, a liquid supply pump for supplying hydraulic oil to the parking brake, a parking valve and an emergency valve for controlling on-off between the parking brake and the liquid supply pump, the method comprising: in the running process of the vehicle, controlling the parking valve to be closed and controlling the emergency valve to be opened; detecting a first pressure value of the input end of the parking valve and a second pressure value of the output end of the parking valve; determining a difference between the first pressure value and the second pressure value to obtain a pressure difference; and under the condition that the pressure difference value is larger than or equal to a first differential pressure threshold value, controlling the parking valve to be kept closed, and controlling the emergency valve to be closed.
2. The method of claim 1, wherein the vehicle includes a service brake, and wherein after the determining the difference between the first pressure value and the second pressure value to obtain the pressure difference, the method further comprises: before the service brake starts working, a second differential pressure threshold value is obtained, and the second differential pressure threshold value is smaller than the first differential pressure threshold value; And controlling the service brake to start working under the condition that the pressure difference value is smaller than the first pressure difference threshold value and larger than the second pressure difference threshold value.
3. The method according to claim 2, wherein the method further comprises: before the parking brake starts to work, controlling the service brake to start to work; Detecting a third pressure value between the parking brake and the liquid supply pump under the condition that the service brake starts to work; controlling the parking brake to start working under the condition that the third pressure value is larger than a pressure threshold value; and under the condition that the vehicle is successfully parked, controlling the parking brake to stop working.
4. The method according to claim 1, wherein the method further comprises: detecting a fourth pressure value between the parking brake and the liquid supply pump under the condition that the parking brake starts to work; Controlling the liquid supply pump to supply hydraulic oil to the parking brake under the condition that the fourth pressure value is smaller than a first preset pressure; and under the condition that the fourth pressure value is larger than or equal to a second preset pressure, controlling the liquid supply pump to stop working, wherein the second preset pressure is larger than the first preset pressure.
5. The method of claim 4, wherein the vehicle further comprises an accumulator for storing hydraulic oil, and wherein after detecting a fourth pressure value between the parking brake and the fluid supply pump, the method further comprises: controlling the accumulator to supply hydraulic oil to the parking brake under the condition that the fourth pressure value is smaller than the first preset pressure and the liquid supply pump cannot work; And under the condition that the fourth pressure value is larger than or equal to the second preset pressure, controlling the energy accumulator to stop working.
6. The method according to any one of claims 1 to 5, further comprising: under the condition that the parking brake starts to work, acquiring a preset flow value; And controlling the opening degree of the parking valve so that the flow between the parking brake and the liquid supply pump is equal to the preset flow value.
7. The method of any one of claims 1 to 5, wherein the vehicle includes a first sensor and a second sensor, the detecting a first pressure value at the park valve input and a second pressure value at the park valve output, comprising: Controlling the first sensor to detect the pressure of the input end of the parking valve so as to obtain the first pressure value; and controlling the second sensor to detect the pressure of the output end of the parking valve so as to obtain the second pressure value.
8. A control device of a vehicle, characterized in that the vehicle includes a parking brake, a liquid supply pump for supplying hydraulic oil to the parking brake, a parking valve and an emergency valve for controlling on-off between the parking brake and the liquid supply pump, the device comprising: The first control unit is used for controlling the parking valve to be closed and controlling the emergency valve to be opened in the running process of the vehicle; the detection unit is used for detecting a first pressure value of the input end of the parking valve and a second pressure value of the output end of the parking valve; a determining unit, configured to determine a difference between the first pressure value and the second pressure value, so as to obtain a pressure difference; And the second detection unit is used for controlling the parking valve to be kept closed and controlling the emergency valve to be closed under the condition that the pressure difference value is larger than or equal to a first pressure difference threshold value.
9. A control device for a vehicle, comprising: A processor; A memory in which a program or instructions are stored, the processor implementing the steps of the control method of a vehicle according to any one of claims 1 to 7 when the program or instructions in the memory are executed.
10. A readable storage medium, characterized in that a program or instructions is stored on the readable storage medium, which when executed by a processor, realizes the steps of the control method of a vehicle as claimed in any one of claims 1 to 7.

Description

Control method and device for vehicle and readable storage medium Technical Field The present application relates to the field of vehicle engineering technologies, and in particular, to a method and apparatus for controlling a vehicle, and a readable storage medium. Background Currently, to ensure vehicle safety, the parking brake must lock the working components by purely mechanical means, allowing the vehicle to reliably park. The medium for stopping the parking car is mainly compressed air (mainly used for commercial vehicles) and hydraulic pressure (mainly used for passenger vehicles and engineering machinery) according to different vehicle types. The braking torque required by the commercial vehicle is larger, compressed air is basically adopted, the thrust of a braking air chamber acts on the wheel brakes in a proportional amplifying way after passing through the mechanism, and the vehicle braking is implemented. The parking of the passenger car mainly depends on a guy rope or an integrated electronic parking, and the control mechanism is a hand brake valve or an electric control switch. The engineering machinery brakes to a full-power braking system, and the parking brakes are hydraulic disc type or drum type brakes, so that the temperature is low during braking due to low speed of the engineering machinery, and the performance requirements can be met by medium hydraulic oil. However, the control method of the vehicle at the present stage has the technical problems of poor running reliability and the like. Disclosure of Invention The embodiment of the application provides a vehicle control method, a vehicle control device and a readable storage medium, which are used for solving the technical problems of poor running reliability and the like in the prior art. According to a first aspect of an embodiment of the present application, there is provided a control method of a vehicle, the vehicle including a parking brake, a liquid supply pump for supplying hydraulic oil to the parking brake, a parking valve and an emergency valve for controlling on-off between the parking brake and the liquid supply pump, the method including: In the running process of the vehicle, the parking valve is controlled to be closed, and the emergency valve is controlled to be opened; Detecting a first pressure value of an input end of the parking valve and a second pressure value of an output end of the parking valve; Determining a difference between the first pressure value and the second pressure value to obtain a pressure difference; and under the condition that the pressure difference value is greater than or equal to a first differential pressure threshold value, controlling the parking valve to be kept closed, and controlling the emergency valve to be closed. In some embodiments, the vehicle includes a service brake, and after determining the difference between the first pressure value and the second pressure value to obtain the pressure difference, the method further includes: Before the service brake starts working, a second differential pressure threshold value is obtained, and the second differential pressure threshold value is smaller than the first differential pressure threshold value; And controlling the service brake to start working under the condition that the pressure difference value is smaller than the first pressure difference threshold value and larger than the second pressure difference threshold value. In some embodiments, the method further comprises: before the parking brake starts to work, controlling the service brake to start to work; Detecting a third pressure value between the parking brake and the liquid supply pump under the condition that the service brake starts to work; Controlling the parking brake to start working under the condition that the third pressure value is larger than the pressure threshold value; And under the condition that the vehicle is successfully parked, controlling the parking brake to stop working. In some embodiments, the method further comprises: Detecting a fourth pressure value between the parking brake and the liquid supply pump under the condition that the parking brake starts to work; Controlling a liquid supply pump to supply hydraulic oil to the parking brake under the condition that the fourth pressure value is smaller than the first preset pressure; And under the condition that the fourth pressure value is larger than or equal to the second preset pressure, controlling the liquid supply pump to stop working, wherein the second preset pressure is larger than the first preset pressure. In some embodiments, the vehicle further comprises an accumulator for storing hydraulic oil, the method further comprising, after detecting a fourth pressure value between the parking brake and the fluid supply pump: when the fourth pressure value is smaller than the first preset pressure and the liquid supply pump cannot work, controlling the energy accumulator to supply hydraulic