A hydraulic brake system for a vehicle
By adopting a parallel structure of the main pump group and the backup pump group, dual sensor monitoring, and oil cooler design in the vehicle hydraulic braking system, the problems of easy failure of key pressure sensors and decrease in oil viscosity are solved, achieving safe redundancy design and stable braking performance, and improving the system's reliability and emergency response capability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAOSHI (BEIJING) IND TECHNOLOGY CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-07-17
AI Technical Summary
In existing vehicle hydraulic braking systems, key pressure sensors are prone to failure, leading to misjudgments. The motor pump unit lacks redundancy design, and the viscosity of the oil decreases during prolonged braking, affecting braking stability and reducing braking performance, thus failing to meet safety requirements.
It adopts a parallel structure of main pump group and standby pump group, and the controller ECU monitors and switches automatically in real time; dual sensors are connected in parallel at key pressure detection points, and the driving and parking brake circuits are integrated. The oil tank assembly includes an oil cooler, and an emergency operation mechanism and automatic pressure replenishment function are designed.
It improves the system's safety redundancy and reliability, ensures a continuous supply of high-pressure hydraulic fluid, stabilizes braking performance, adapts to complex road conditions, reduces the risk of brake failure, and enhances operational convenience and emergency response efficiency.
Smart Images
Figure CN224511101U_ABST
Abstract
Claims
1. A hydraulic braking system for a vehicle, comprising a base (1), characterized in that: The base (1) is equipped with an oil tank assembly (2), a motor pump assembly (3), a control valve assembly (4), an accumulator assembly (5), and a controller ECU (6). The oil tank assembly (2) is used to store brake system fluid and also serves as a mounting base for the motor pump assembly (3); The fuel tank assembly (2) includes a fuel tank (8), and an air filter (9) is installed on the upper part of the fuel tank (8). A level switch (10) is installed on the oil tank (8) to detect the level of oil in the oil tank (8); The oil tank assembly (2) includes an oil cooler (201), which is connected through the vehicle cooling system circuit to solve the problem of viscosity reduction caused by oil temperature rise during long-term braking; The motor pump unit (3) is used for power conversion of the braking system. It converts electrical energy into hydraulic energy of high-pressure oil and stores it in the accumulator group (5). The start and stop are controlled by the controller ECU (6). The motor pump group (3) includes a main pump group (11) and a standby pump group (12). The main pump group (11) and the standby pump group (12) are installed in parallel. The status of the main pump group (11) and the standby pump group (12) is monitored in real time by the controller ECU (6). When the main pump group (11) is abnormal, it automatically switches to the standby pump group (12) to ensure a continuous supply of high-pressure oil. The control valve assembly (4) includes an aluminum alloy valve block (7), on which the valve assembly and sensor assembly are integrated and mounted. The control valve group (4) includes a service brake control circuit (13) and a parking brake control circuit (14). The tail end of the service brake control circuit (13) is connected to a service brake cylinder (15), and the tail end of the parking brake control circuit (14) is connected to a parking brake cylinder (16). The output end of the oil tank assembly (2) is connected to the motor pump group (3). The output end of the motor pump group (3) is provided with a main circuit check valve (17). A high pressure filter (18) is provided at one end of the main circuit check valve (17) that connects to the service brake control circuit (13) and the parking brake control circuit (14). An overflow valve (19) is provided in parallel at one end of the main circuit check valve (17) that connects to the motor pump group (3). The service brake control circuit (13) is connected to a branch one-way valve (20), a service brake accumulator (21), a first pressure detection point (22), an electromagnetic shut-off valve (23), an electro-proportional three-way pressure reducing valve (24), a booster switch valve (25), a pressure reducing switch valve (26), and a second pressure detection point (27). The first pressure detection point (22) is provided with two first pressure sensors (28) connected in parallel, and the second pressure detection point (27) is provided with two second pressure sensors (29) connected in parallel. The parking brake control circuit (14) is connected to an electromagnetic switch valve (30), a third pressure detection point (31), a parking brake accumulator (32), a two-position three-way solenoid valve (33), a throttle valve (34), a quick connector (35), and a fourth pressure detection point (36). The third pressure detection point (31) is connected in parallel with two third pressure sensors (37), and the fourth pressure detection point (36) is connected in parallel with two fourth pressure sensors (38). The accumulator group (5) is connected to the control valve group (4) at its inlet and outlet to store high-pressure oil; The controller ECU (6) is used to receive vehicle VCU commands and analyze and process the input signals of various sensors in the sensor group, and to control the motor in the motor pump group (3) in the hydraulic system and the solenoid valve in the valve group, thereby realizing the action control of the braking device and finally realizing each braking function.
2. The hydraulic brake system for a vehicle according to claim 1, characterized by: The controller ECU (6) includes a housing and a circuit board, and the controller ECU (6) is fixed to the base (1) by screws.