Motor direct-driven brake-by-wire system with main/auxiliary cylinder and brake control method of system

Abstract

The invention discloses a motor direct-driven brake-by-wire system with a main / auxiliary cylinder and a brake control method of the system. The brake system is braked through combination of a double-cavity main cylinder brake module and a single-cavity auxiliary cylinder brake module and relatively independently controlled by an electronic control unit, the double-cavity main cylinder brake modulecomprises a main cylinder integrated motor, a main cylinder ball lead screw mechanism and a main cylinder brake pressure generation unit, two groups of single-cavity auxiliary cylinder brake components are parallelly connected to form the single-cavity auxiliary cylinder brake module, normally open switch solenoid valves, single-cavity auxiliary cylinder pressurizing units and wheel-brake cylinder execution pipelines are serially connected to form the single-cavity auxiliary cylinder brake components, the main cylinder brake pressure generation unit and the single-cavity auxiliary cylinder pressurizing units generate brake pressure through driving of the integrated motor and transmission of the ball lead screw mechanism, and wheel-brake cylinders are braked and controlled by the solenoidvalves. The system solves the problems that when a single motor drives a main cylinder, the building time of the pressure is long, fluctuation is large, accuracy is poor, and the requirements for performances of the motor are high.

Description

technical field [0001] The invention belongs to the technical field of braking control of intelligent automobiles, and in particular relates to a motor direct-drive-by-wire braking system with a main / auxiliary cylinder and a braking control method thereof. Background technique [0002] With the development of new energy vehicle technology, its requirements for the electrification of vehicles are getting higher and higher, and at the same time, more attention is paid to the safety of vehicles. Therefore, the requirements for the driving, braking and perception of the surrounding environment of the vehicle during driving are getting higher and higher, and the vehicle braking system is an important component to ensure vehicle safety, and its performance is directly related to the vehicle and even the driver and passengers. Therefore, various automobile manufacturers have put forward higher requirements for the braking system. [0003] The traditional automobile braking system ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects in the above-mentioned prior art, the present invention proposes a motor direct-drive brake-by-wire system with a master / auxiliary cylinder and a braking control method thereof. The braking module and the single-cavity auxiliary cylinder braking module perform braking control to solve the problems of long pressure build-up time, large fluctuations, poor precision and high requirements on motor performance when the main cylinder is driven by a single motor

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