An emergency brake booster control system and method

Abstract

The present invention provides an emergency braking boost control system, which includes an actuator, a master cylinder pressure sensor, a servo cylinder pressure sensor, a wheel speed sensor, a displacement sensor and an electronic control unit. Corresponding control methods are also provided. The advantage of the invention is that the system can judge the braking demand of the vehicle by collecting the brake pedal displacement signal, the wheel speed signal and the master cylinder pressure signal. Combined with the state of the vehicle, it can provide high braking pressure in time, and can hand over the control authority to the ABS function when the wheels tend to lock, so that both good braking efficiency and stability can be maintained during the braking process.

Description

technical field [0001] The invention relates to the technical field of electronic hydraulic braking of vehicles, in particular to an emergency braking boosting control system and method. Background technique [0002] Emergency braking is a braking condition that drivers often encounter in daily driving. In order to avoid hitting pedestrians or obstacles, the vehicle needs to stop as soon as possible within a short distance. Therefore, the internal pressure of the braking system needs to be increased rapidly to provide greater braking force, and the braking pressure needs to be adapted in real time according to the driver's braking demand, and the brakes should be released smoothly when the vehicle is out of emergency braking conditions pressure to maintain good braking performance. [0003] With the development of new energy vehicles and smart vehicles, the traditional vacuum-assisted transmission and braking system is no longer applicable, and the brake-by-wire technology ...

AI Technical Summary

Problems solved by technology

The disadvantages of this invention are: 1) the emergency braking control method proposed does not explain what pressure gradient should be used to make the pressure of the brake master cylinder reach the preset maximum braking pressure when the vehicle is in emergency braking. The magnitude of the gradient determines the magnitude of the braking force and the braking distance during emergency braking; 2) there is no indication of which factors the preset maximum braking pressure is related to, and how to determine it; 3) in the emergency braking control method proposed by the invention Only the monitoring state and boost state, does not involve whether the pressure of the brake master cylinder should remain constant or gradually decrease with a certain gradient when the car no longer needs emergency braking

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