Regenerative braking energy recovery system of hydraulically-driven automobile

Abstract

A regenerative braking energy recovery system of a hydraulically-driven automobile is characterized in that each wheel half axle of the automobile is provided with a secondary element pump / motor, andthe wheel half axles are connected with the secondary element pumps / motors through electromagnetic clutches; a torque sensor and a rotating speed sensor are installed on each wheel half axle; each secondary element pump / motor is connected with a hydraulic oil cylinder; each secondary element pump / motor is connected with a high-pressure energy accumulator through a second two-position two-way electromagnetic reversing valve; a pilot pressure control valve and a pressure sensor are connected with the oil outlet of each high-pressure energy accumulator, and each high-pressure energy accumulator is controlled to be connected and disconnected through the pilot pressure control valve; the secondary element pump / motor is connected with a hydraulic master pump through a first two-position two-wayelectromagnetic reversing valve; the hydraulic master pump is connected with the hydraulic oil cylinders through hydraulic pipelines; and the hydraulic master cylinder is sequentially connected with areduction gearbox, a clutch and an engine. All components are connected with a controller. The hydraulic regenerative braking recovery system is applied to an internal combustion engine passenger vehicle, so the complexity of the transmission structure of a traditional internal combustion locomotive is reduced.

Description

technical field [0001] The invention relates to a regenerative braking energy recovery system for a hydraulically driven vehicle. Background technique [0002] Under urban cycling conditions, the energy consumed by vehicle braking accounts for 31%-67% of the driving energy of the vehicle. Braking energy recovery technology can effectively improve the efficiency of energy use. In the energy braking recovery system, according to the different energy storage components, it is divided into electric regenerative braking, hydraulic regenerative braking, and flywheel regenerative braking: Although the electric regenerative braking system has a large energy density, it has a small power density and is unstable. Charging current will continue to consume battery life; flywheel regenerative braking energy efficiency is high, but flywheel cannot store energy for a long time, and when the car is turning at high speed, the torque generated by the rotation of flywheel will affect the steer...

AI Technical Summary

Problems solved by technology

It is more difficult to arrange the hydraulic regenerative braking system on the current internal combustion engine passenger car with compact mechanical structure and little remaining space

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