Full-decoupling electronic/hydraulic boosting system for regenerative braking of electric automobile

Abstract

The invention belongs to the field of brake boosting systems, and relates to a full-decoupling electronic / hydraulic boosting system for regenerative braking of an electric automobile. The system comprises a pedal energy recycling mechanism and a motor boosting mechanism, a small hydraulic cylinder in the pedal energy recycling mechanism converts energy generated when a driver steps on a brake pedal into pressure energy to be stored in an energy accumulator, high-pressure oil in the energy accumulator participates in establishment of brake pressure under a certain condition, and a simulation spring is used for simulating the traditional pedal feeling. The motor assisting mechanism pushes the main cylinder pedal through the transmission mechanism to establish braking pressure. The full-decoupling electronic / hydraulic boosting system is suitable for a regenerative braking system and an active braking system of the electric automobile, and the pedal feeling can be kept unchanged in the braking process; brake pedal treading energy of a driver can be stored and utilized, and the energy utilization rate of a brake system can be remarkably increased in the long-term use process; and a safebackup function under a failure condition is realized.

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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