Fully decoupled electronic/hydraulic booster system for regenerative braking of electric vehicles

Abstract

The invention belongs to the field of brake booster systems, and relates to a fully decoupled electronic / hydraulic booster system for regenerative braking of electric vehicles. The system includes a pedal energy recovery mechanism and a motor booster mechanism; The cylinder converts the energy of the driver stepping on the brake pedal into pressure energy and stores it in the accumulator. The high-pressure oil in the accumulator participates in the establishment of brake pressure under certain conditions. The analog spring is used to simulate the traditional pedal feel; The motor assist mechanism pushes the master cylinder pedal through the transmission mechanism to build up the braking pressure. The invention is applicable to the regenerative braking system and active braking system of electric vehicles, and can keep the pedal feel unchanged during the braking process; can store and utilize the energy of the driver stepping on the brake pedal, and can significantly increase the energy of the braking system during long-term use Utilization rate; with safety backup function in case of failure.

Description

technical field [0001] The invention belongs to the field of brake boosting systems, and relates to a fully decoupled electronic / hydraulic boosting system for regenerative braking of electric vehicles. Background technique [0002] With the continuous popularization of electric vehicles and the development of regenerative braking systems, the vacuum booster-based brake booster systems on traditional vehicles are no longer suitable for electric vehicles equipped with regenerative braking systems. The new electronic power-assisted braking system was developed. The current mainstream electronic power-assisted braking system can be divided into non-decoupled electronic power-assisted braking system and decoupled electronic power-assisted braking system in terms of structure. [0003] In the non-decoupled electronic power-assisted braking system, the motor assist and pedal force are rigidly combined, and they work together on the push rod of the brake master cylinder to realize ...

AI Technical Summary

Problems solved by technology

This solution increases the complexity of the control part of the electronic power assist system. At the same time, frequent calls to the motor also increase energy consumption, which reduces the energy recovery rate of the regenerative braking system to a certain extent.

[0004] In the decoupled electronic power-assisted braking system, a travel simulator is usually used to simulate the traditional pedal feel and absorb high-pressure brake fluid, but the energy generated by manpower stepping on the brake pedal is not utilized during the braking process.

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