Emergency braking power-assisted control system and method

Abstract

The invention provides an emergency braking power-assisted control system. The emergency braking power-assisted control system comprises an executing mechanism, a main cylinder pressure sensor, a servo cylinder pressure sensor, a wheel speed sensor, a displacement sensor and an electronic control unit. The invention further provides a corresponding control method. The emergency braking power-assisted control system and method have the advantages that the system can judge the vehicle braking requirement by collecting a brake pedal displacement signal, a wheel speed signal and a main cylinder pressure signal. High braking pressure is provided in time in combination with the vehicle state, the control authority can be given to the ABS function when wheels have the locking tendency, and good braking efficiency and stability can be kept in 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of new energy vehicles and smart vehicles, the traditional vacuum-assisted transmission and braking system is no longer applicable, and the brake-by-wire technology ...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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