Braking system with double independent braking units and braking method

Abstract

The invention discloses a braking system with double independent braking units. The braking system comprises a drum brake, a hydraulic braking unit and an electronic mechanical braking unit, wherein the drum brake takes a cam as an actuating device, and the cam is fixedly connected with a connecting rod; the hydraulic brake unit comprises a main cylinder piston, a hydraulic sensor and a wheel cylinder piston connected with the main cylinder piston through a hydraulic pipeline, the main cylinder piston is used for being connected with a brake pedal, and the wheel cylinder piston is fixedly connected with the connecting rod; the electronic mechanical braking unit comprises a motor, a torque sensor and a speed reducer, and the motor is fixedly connected with the connecting rod sequentially through the speed reducer and the torque sensor. According to the braking system, a mode that hydraulic braking (without using a booster) and electronic mechanical braking are coupled and superposed is adopted, the braking force requirement of the electric automobile is met, and therefore a problem that an existing electric automobile braking method is poor in braking reliability is effectively solved. The invention further provides a braking method based on the braking system with the double independent braking units.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and relates to electric vehicle braking technology, in particular to a braking system and a braking method with double independent braking units. Background technique [0002] Traditional fuel vehicles widely adopt hydraulic (air pressure) + vacuum boosting braking mode. With the popularization of electric vehicles, their braking forms are facing new problems and challenges. On the one hand, since electric vehicles do not have a fuel engine, the original vacuum booster structure is no longer applicable; on the other hand, the hydraulic + electronic booster braking mode currently used by electric vehicles still faces the risk of brake failure due to hydraulic leakage. Therefore, it is necessary to propose a new type of braking system to improve the backup system of the electric vehicle brake actuator and improve the braking reliability of the electric vehicle. Contents of the inventio...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a braking system and braking method with dual independent braking units, which adopts the hydraulic braking (no need to use a booster) coupled with electromechanical braking to meet the braking force requirements of electric vehicles , so as to effectively solve the problem of poor braking reliability in the above-mentioned existing electric vehicle braking methods

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