Hydraulic double-motor driving electronic hydraulic braking system

Abstract

A hydraulic double-motor driving electronic hydraulic braking system comprises a braking pedal, a braking master cylinder, a secondary master cylinder, a liquid storage tank, a pedal displacement sensor, a hydraulic pressure sensor, an electronic control unit ECU, a first electronic control linear moving module and a second electronic control linear moving module for performing active control on hydraulic braking force and pedal force of the system, an electronic stability control module ESC for regulating the hydraulic braking force of each wheel cylinder, a tee joint for connecting hydraulic pipelines between the braking master cylinder and the inlet of the electronic stability control (ESC) module as well as between the secondary master cylinder and the inlet of the ESC module. According to the invention, the pedal force of a driver can be utilized for pressure establishing, the active control on the pedal force is realized while a pedal force simulator with a complex structure is omitted, braking pedal feel is ensured, the braking intention of the driver can be correctly reflected, the active control on hydraulic pressure is realized, the braking requirement of a vehicle is met, maximum braking energy recycling can be realized, the control is precise, and the response speed is high.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and relates to automobile braking technology, in particular to an electronic hydraulic braking system driven by a motor. Background technique [0002] Due to energy shortages and increasingly prominent environmental problems, electric vehicles have become the main direction of the future development of the automotive industry due to their clean and pollution-free, high energy efficiency, diverse energy sources, simple structure, and convenient maintenance. Restrictions, short driving range and high cost of electric vehicles; with the improvement of intelligent requirements, and the need to solve problems such as traffic accidents and traffic congestion, many auto companies such as Continental and General Motors are conducting research on autonomous vehicles, and the development of autonomous driving technology fast. The braking system is a crucial system in the safety performance of automobi...

AI Technical Summary

Problems solved by technology

[0006] The general electronic hydraulic braking system realizes the active control of the hydraulic braking force of the hydraulic braking system through the joint action of high-pressure accumulators, motors and pumps, but this technology is not yet mature, and there are still hidden dangers in reliability and safety. To ensure the pedal feeling or need to use a pedal simulator to simulate the pedal feeling; in addition, it does not make full use of manpower, that is, the pedal force of the driver to brake, resulting in a certain degree of waste of energy

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