Electric power-assisted brake system with brake pedal completely separated from power-assisted mechanism

Abstract

The invention provides an electric power-assisted brake system with a brake pedal completely separated from a power-assisted mechanism. A brake intent generating unit is connected with a pedal sensation simulator through a hydraulic pipeline; the pedal sensation simulator is arranged on the portion, from a rear cavity of a main cylinder and a HCU inlet, of a hydraulic pipeline; an HCU outlet is connected with a wheel cylinder through the hydraulic pipeline; a solenoid valve is arranged on the portion, from the rear cavity of the main cylinder and the HCU inlet, of the hydraulic pipeline; the portion, from the rear cavity of the main cylinder and the HCU inlet, of the hydraulic pipeline is provided with a hydraulic pressure sensor; a main cylinder push rod of an electric power assembly is connected with a piston of the rear cavity of the main cylinder; an electronic control unit is connected with a pedal displacement sensor, an HCU, the solenoid value, the hydraulic pressure sensor andthe signal end of a motor through wiring harness. The system solves the problems that in an existing electric power-assisted brake system, coupling of a brake pedal and a power-assisted mechanism is complicate, the control algorithm is complicate, the pedal is poor in stability, a drive set is large in size, and industrial monopoly of foreign-funded enterprises occurs.

Description

technical field [0001] The invention belongs to the technical field of automobile brake systems, in particular to an electric power-assisted braking system in which a brake pedal and a booster mechanism are completely separated. Background technique [0002] With the development of technology in the automotive field, the traditional hydraulic braking system can no longer meet people's requirements for high safety and high comfort vehicle performance. Especially in recent years, with the development trend of automobile electrification and intelligence, higher requirements are put forward for the automobile braking system. For electric vehicles, in order to increase the cruising range, the braking system must have regenerative braking capability, which requires the braking system to have the ability to decouple the brake pedal from the frictional braking force; for intelligent vehicles, it is required that the vehicle must have Active braking function. Obviously, the traditi...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned electric power-assisted braking system problems such as complex coupling between the brake pedal and the power-assisted mechanism, complex control algorithm, poor pedal feel retention, large size of the transmission pair, and industry monopoly of foreign-funded enterprises, the present invention proposes a system Electric power-assisted braking system with complete separation of moving pedal and power-assisted mechanism

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