Distributed braking system with parking function and method of pressure adjustment and control for same

Abstract

The invention relates to the technical field of vehicle braking control systems and specifically provides a distributed braking system with a parking function and a method of pressure adjustment and control for the same. The system comprises a power source, a braking controller, a braking main cylinder, a main cylinder displacement sensor, a braking pedal, a pedal displacement sensor and an electric force assisting device, wherein the electric force assisting device, the main cylinder displacement sensor and the pedal displacement sensor are electrically connected to the braking controller respectively. The distributed composite braking system also comprises at least three electric cylinders, wherein the at least three electric cylinders are electrically connected to the braking controllerrespectively; the braking main cylinder is linked with the at least three electric cylinders by braking pipelines; and the electric cylinders are in one-to-one corresponding connection to wheel brakes with the same quantity on a vehicle, and a braking loop is formed by each of the electric cylinders and the corresponding wheel brake. The system and the method provided by the invention have the beneficial effects that control is flexible; braking responses are quick; and control precision of braking pressures is high, so the intelligent driving vehicle can run stably and reliability is high during braking.

Description

technical field [0001] The invention relates to the technical field of vehicle braking control systems, in particular to a distributed braking system with a parking function and a pressure regulation control method thereof. Background technique [0002] Automobile braking system is closely related to automobile driving safety. In the hydraulic braking system of traditional automobiles, the driver applies the braking pressure to the wheel brakes of each wheel brake by depressing the brake pedal, so as to achieve braking and decelerate the vehicle. Its hydraulic braking system is mainly composed of brake pedal, vacuum booster, brake manpower cylinder, hydraulic pipeline, rear wheel brake and front wheel brake. [0003] From the perspective of brake boosting methods, most of the current automotive hydraulic braking systems still use vacuum boosting, and only a few cars use other forms of boosting such as electric boosting. Since there is no vacuum source provided by the engin...

AI Technical Summary

Problems solved by technology

For example, the hydraulic unit of the ESC has problems such as the electromagnetic valve is not suitable for long-term continuous work, the working life of the plunger pump is difficult to meet, and the noise of the plunger pump motor is relatively large; the high-pressure accumulator of the EHB is difficult to seal, and the There are potential safety hazards, and the entire system needs to work frequently to maintain sufficient standing pressure and consume more energy; some electric power boosters are not decoupled, and require the cooperation of the ESC hydraulic unit to achieve brake pedal stroke simulation and wire-controlled braking , increasing the complexity of the system

In essence, the brake pressure adjustment methods of these new electro-hydraulic brake devices are all flow adjustment, and their pressure response dynamic characteristics are not as good as variable capacity adjustment.

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