CN-121973740-A - Brake device, vehicle control method, and vehicle

Abstract

The application provides a braking device, a vehicle control method and a vehicle, and relates to the technical field of vehicle chassis. The braking device comprises a shell, a guide structure and a communicating pipeline, wherein the shell is provided with an oil filling port, the guide structure is arranged in the shell, the top of the guide structure is connected with the inner wall of the top of the shell, the guide structure divides a containing cavity in the shell into a guide cavity and a liquid storage cavity, the guide cavity is positioned in the guide structure, the guide cavity is communicated with the liquid storage cavity, the oil filling port is communicated with the liquid storage cavity, the guide cavity is used for placing a floater, one end of the communicating pipeline is communicated with the top space of the guide cavity, and the other end of the communicating pipeline is communicated with the top space of the liquid storage cavity. The position of the floater can reflect the real liquid level of the brake oil liquid more accurately, so that the probability of liquid level false alarm is reduced, and the accuracy and the reliability of liquid level detection are improved.

Inventors

• LIU KUO
• YU ZHENYE

Assignees

• 长城汽车股份有限公司

Dates

Publication Date

20260505

Application Date

20260212

Claims (10)

1. 1. A brake apparatus, comprising: The shell is provided with an oil filling port; The guide structure is arranged in the shell, the top of the guide structure is connected with the inner wall of the top of the shell, the guide structure divides the accommodating cavity in the shell into a guide cavity and a liquid storage cavity, the guide cavity is positioned in the guide structure, the guide cavity is communicated with the liquid storage cavity, the oil filling port is communicated with the liquid storage cavity, and the guide cavity is used for placing a floater; and one end of the communication pipeline is communicated with the top space of the guide cavity, and the other end of the communication pipeline is communicated with the top space of the liquid storage cavity.
2. 2. The brake apparatus according to claim 1, wherein the housing is formed with a main body portion and an extension portion, the extension portion being located at a top of the main body portion, the extension portion being provided with the oil filler port; The both ends of guide structure respectively with the top inner wall and the bottom inner wall of main part are connected, the one end of intercommunication pipeline connect in the top of main part and with the headspace intercommunication in direction chamber, the other end of intercommunication pipeline connect in extension and with the headspace intercommunication in stock solution chamber.
3. 3. The brake apparatus of claim 2, wherein the extension has a first fluid level indicator and the body has a second fluid level indicator; The extension portion is provided with an opening for connection with the communication pipeline, and at least part of the opening is higher than the first liquid level mark.
4. 4. The brake apparatus of claim 2, wherein the housing comprises a first housing and a second housing, the first housing and the second housing being interconnected to enclose the receiving chamber; the first housing forming the extension, the first housing and the second housing together forming the main body; the guide structure comprises a first guide part connected with the first shell and a second guide part connected with the second shell, and when the first shell is connected with the second shell, the first guide part and the second guide part jointly enclose into the guide cavity.
5. 5. A control method of a vehicle, applied to the brake apparatus according to any one of claims 1 to 4, characterized by comprising: acquiring a liquid level signal of the braking device, and generating a liquid level alarm signal when the liquid level signal is smaller than or equal to a first liquid level threshold value; acquiring a working condition signal representing the running environment state of the vehicle, and identifying the current running road condition of the vehicle based on the working condition signal; Acquiring a first duration of a vehicle in the current driving road condition; And judging whether to output the liquid level alarm signal or not based on the driving road condition and the first duration.
6. 6. The control method of the vehicle according to claim 5, wherein the running road condition includes a steady road condition and a bumpy road condition; The step of judging whether to output the liquid level alarm signal based on the driving road condition and the first duration comprises the following steps: when the vehicle runs on the bumpy road condition and the first duration of the bumpy road condition is greater than or equal to a first duration threshold value, shielding the liquid level alarm signal; and when the vehicle runs on the stable road condition and the first duration time of the stable road condition is greater than or equal to a second duration time threshold value, recovering the normal output of the liquid level alarm signal.
7. 7. The control method of the vehicle according to claim 6, characterized in that the control method further comprises: generating and outputting a forced alarm signal when the liquid level signal is smaller than or equal to a second liquid level threshold value, wherein the second liquid level threshold value is smaller than the first liquid level threshold value; or the control method further comprises: During the period of shielding the liquid level alarm signal, if the liquid level signal is continuously smaller than or equal to the first liquid level threshold value, analyzing the change trend of the liquid level signal; And outputting a forced alarm signal when the liquid level signal continuously drops.
8. 8. The method according to claim 5, wherein the condition signal includes at least one of a wheel speed signal, a vertical acceleration signal, a vehicle body height signal, an image signal, a radar signal, and a navigation signal, and the step of identifying a current traveling road condition of the vehicle based on the condition signal includes: And identifying that the vehicle is currently in a stable road condition or a bumpy road condition based on the working condition signals.
9. 9. The control method of the vehicle according to claim 5, characterized in that the control method further comprises: acquiring real-time deceleration of the vehicle; And shielding the liquid level alarm signal when the absolute value of the deceleration is larger than or equal to a deceleration threshold value.
10. 10. A vehicle comprising a brake apparatus as claimed in any one of claims 1 to 4; or comprises a memory for storing executable program code and a processor for calling and running the executable program code from the memory, causing the vehicle to execute the control method according to any one of claims 5 to 9.

Description

Brake device, vehicle control method, and vehicle Technical Field The application relates to the technical field of vehicle chassis, in particular to a braking device, a vehicle control method and a vehicle. Background With the vigorous development of the automobile industry, new technologies and new schemes are developed along with the development of the automobile industry. The highly integrated ONE-BOX solution (integrated brake control system) is becoming the dominant direction of brake technology development. In the ONE-BOX scheme, a pedal stroke sensor is arranged for detecting the stroke of the stepping of a brake pedal, and when the stroke change of the brake pedal is detected, a servo motor works to provide corresponding thrust to push a brake master cylinder piston to provide braking pressure for a brake, so that braking is realized. The top of the brake master cylinder is integrated with a brake oil pot, and the brake oil pot is used for storing and supplying brake fluid. In order to ensure the capacity of the brake fluid, a liquid level sensor is arranged in the brake oil pot, and the liquid level sensor comprises a floater and a sensing switch such as a reed pipe or a conductive probe. When the liquid level is lower than the lower limit of the liquid level of the brake oil pot, the floater sinks along with the liquid level, and the magnetic contact of the floater approaches to the reed pipe or contacts with the conductive probe to give out a liquid level alarm. However, when the vehicle passes through bumpy road conditions such as a hollow road section, a continuous damping belt and the like, the floater moves up and down in the oilcan, so that a large amount of bubbles are generated by brake liquid in the cavity of the floater due to pressure change, and the bubbles and the pressure difference give downward pressure to the floater, so that the liquid level alarm is easy to trigger by mistake. Disclosure of Invention The application provides a braking device, a vehicle control method and a vehicle, and aims to solve the problem that liquid level alarm is easy to trigger by mistake due to more bubbles. The specific technical scheme is as follows: In a first aspect, an embodiment of the application provides a braking device, which comprises a shell, a guide structure and a communicating pipeline, wherein the shell is provided with an oil filling port, the guide structure is arranged in the shell, the top of the guide structure is connected with the inner wall of the top of the shell, a containing cavity in the shell is separated into a guide cavity and a liquid storage cavity by the guide structure, the guide cavity is positioned in the guide structure, the guide cavity and the liquid storage cavity are communicated with each other, the oil filling port is communicated with the liquid storage cavity, the guide cavity is used for placing a floater, and one end of the communicating pipeline is communicated with the top space of the guide cavity, and the other end of the communicating pipeline is communicated with the top space of the liquid storage cavity. According to the braking device provided by the embodiment of the application, the communication between the guide cavity and the external atmosphere can be realized by arranging the communication pipeline. In this way, the pilot chamber does not create a pressure build-up or partial vacuum, although the float will float up and down due to the vertical forces of the vehicle. Thus, the number of bubbles precipitated due to pressure change can be reduced, and the problem that the air pressure difference directly acts on the floater to generate liquid level interference can be solved. Meanwhile, after the bubbles are generated, the communication pipeline can also be used as an exhaust channel, so that the bubbles are exhausted after being broken, and the problem that the bubbles gather around the floater or at the top of the guide cavity is further improved. Thus, non-liquid level forces (differential air pressure forces, additional forces resulting from bubble attachment or accumulation) experienced by the float can be effectively suppressed or eliminated. Therefore, the position of the floater can reflect the real liquid level of the brake oil liquid more accurately, so that the probability of liquid level false alarm is reduced, and the accuracy and the reliability of liquid level detection are improved. In some embodiments, the housing is formed with a main body portion and an extension portion, the extension portion being located on top of the main body portion, the extension portion being provided with the oil filler port; The both ends of guide structure respectively with the top inner wall and the bottom inner wall of main part are connected, the one end of intercommunication pipeline connect in the top of main part and with the headspace intercommunication in direction chamber, the other end of intercommunication pipeline connect in extensi