An electro-hydraulic hybrid power system applied to SUV and its control method

Abstract

An electro-hydraulic hybrid power system and its control method applied to SUVs according to the present invention belong to the technical field of hydraulic application of electric vehicles and aim to solve the problems of low braking energy recovery rate and optimized motor driving efficiency of four-wheel drive electric vehicles. The system includes: a front motor, a front coupling mechanism, a front drive axle and a front wheel that are mechanically connected in sequence; a rear motor, a rear coupling mechanism, a rear drive axle and a rear wheel that are mechanically connected in sequence; and a power drive that is electrically connected to the front motor and the rear motor respectively. battery; front pump / motor mechanically connected to front coupling mechanism via front clutch; rear pump / motor mechanically connected to rear coupling mechanism via rear clutch; hydraulic system hydraulically connected to front pump / motor and rear pump / motor respectively; and Front motor, rear motor, front pump / motor, rear pump / motor, power battery, front clutch, rear clutch, hydraulic system, brake pedal, and accelerator pedal are respectively signal-connected electronic control units.

Description

technical field [0001] The invention relates to a technical field of electric vehicle hydraulic application, relates to a drive and braking energy recycling device, in particular to an electro-hydraulic hybrid power system applied to an SUV and a control method thereof. Background technique [0002] In recent years, with the continuous development of the global economy, the production, sales and ownership of automobiles have increased year by year, and the available energy has decreased year by year. Energy-saving and environmentally friendly vehicles have become a hot research topic in all countries in the world. Electric vehicles are considered to be the most promising future of automobiles. Therefore, how to improve the energy utilization rate of electric vehicles is very important. Regenerative braking is one of the effective ways to improve the energy utilization rate of electric vehicles. Regenerative braking energy storage devices include battery energy storage, flywh...

AI Technical Summary

Problems solved by technology

However, both traditional vehicles and electric vehicles have frequent use of vehicle brakes when they go downhill continuously, which seriously affects the braking stability of vehicles and reduces the service life of vehicle brakes. The driving components of electric four-wheel drive passenger vehicles are only motors. The high-efficiency drive of the motor is limited to a certain extent

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