Pedal decoupling type electro-hydraulic composite braking system for integrated pedal displacement measurement

Abstract

The invention relates to a pedal decoupling type electro-hydraulic composite braking system for integrated pedal displacement measurement. The pedal decoupling type electro-hydraulic composite braking system for the integrated pedal displacement measurement comprises a hydraulic braking subsystem and a motor regenerative braking subsystem, wherein an integrated type braking master cylinder assembly of the hydraulic braking subsystem is composed of an integrated type braking master cylinder and a high-pressure oil source. The integrated type braking master cylinder integrates a braking master cylinder pressure generation function, a pedal feeling imitation function and a positive and passive hydraulic assistance function. A high-pressure oil outlet of the high-pressure oil source is connected with the integrated type braking master cylinder, and provides stable and continuous braking energy for the braking process. A pressure sensor is installed on the integrated type braking master cylinder to achieve measurement of displacement of a braking pedal, and decoupling of the braking pedal is achieved. The pedal decoupling type electro-hydraulic composite braking system for the integrated pedal displacement measurement is compact in structure, easy to implement and high in integration degree, improves feeling of the braking pedal of a vehicle, has a positive hydraulic assistance function in a normal braking condition, has a passive hydraulic assistance function in an ineffective condition, effectively ensures braking safety of the vehicle, can be applied to a traditional vehicle line control braking system, and can be widely applicable to all-electric cars, hybrid electric cars and fuel cell cars.

Description

technical field [0001] The invention relates to an automobile braking system, in particular to a pedal decoupling electro-hydraulic composite braking system integrated with pedal displacement measurement. Background technique [0002] During the working process of the braking system of the car, the displacement of the brake pedal reflects the driver's braking manipulation intention. Therefore, it is necessary to install a brake pedal displacement sensor during the electrification modification of transmission vehicles or the development of electric vehicles. The pedal force-travel pedal characteristic composed of brake pedal force and brake pedal travel is an important index for evaluating the braking feeling of the braking system. [0003] One of the outstanding advantages of electric vehicles such as pure electric vehicles, hybrid electric vehicles and fuel cell electric vehicles is that they can realize regenerative braking energy recovery, that is, when braking, part of t...

AI Technical Summary

Problems solved by technology

However, in the above-mentioned solutions, the traditional brake pedal displacement sensor is used to identify the driver's operation intention, which is not convenient for the modification of the traditional braking system, and some of the improved structures are more complicated, and the manufacturing process is extremely demanding; some systems require control logic. Complicated and expensive to implement; some still retain the vacuum booster, but need to add an additional vacuum pump

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