Energy regeneration device of drive-by-wire braking system and control method of braking system

Abstract

An energy regeneration device of a drive-by-wire braking system comprises a gearbox, an oil tank, an electromagnetic clutch, a hydraulic oil pump / motor, an electromagnetic distributing valve, a first electromagnetic reversing valve, a high-pressure energy accumulator, a second electromagnetic reversing valve and a low-pressure energy accumulator. A hydraulic brake is additionally arranged on a brake disc of each wheel, and an increasing gear mechanism is additionally mounted on an output shaft of the gearbox. By the aid of a method for accumulating and releasing braking energy, accumulated energy of the high-pressure energy accumulator can be released when an automobile starts and accelerates, a starting performance and an acceleration performance of the automobile are improved, accumulated energy in the low-pressure energy accumulator can also be directly applied to the wheels during braking and used with a braking motor of the drive-by-wire braking system to realize braking of the automobile, and braking energy recycle efficiency is improved. When the drive-by-wire braking system fails and cannot work normally, the device can be used as an emergency braking system, and the accumulated energy in the energy accumulators is used for realizing parking braking of the automobile. The energy regeneration device is particularly suitable for pure electric automobiles.

Description

technical field [0001] The invention relates to a braking energy regeneration device and a braking system control method for a wire-controlled braking system. Background technique [0002] The brake-by-wire system cancels the hydraulic and pneumatic components in the traditional braking system, uses wires as the information transmission medium, and the electric drive element is the brake actuator. The control unit judges the driver's braking intention according to the braking intention recognition sensor signal, and controls The action of the brake actuator realizes the braking of the vehicle. Its working principle is basically the same as that of hydraulic and pneumatic braking systems. Both use the braking device to convert the kinetic energy of the car into heat energy through mechanical friction and consume it, so as to achieve the purpose of braking or decelerating the car. This has just caused a certain amount of energy waste and increased the wear and tear of the bra...

AI Technical Summary

Problems solved by technology

[0004] The energy storage and release of the currently disclosed braking energy regeneration device are independent of each other, and it is impossible to directly apply the stored energy to the wheels during the braking process, and cannot cooperate with the braking motor of the brake-by-wire system to achieve vehicle braking. Recycling efficiency needs to be improved, and emergency braking function cannot be provided

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