Hydraulic assistant driving/braking system for electric vehicle and control method thereof

Abstract

The invention discloses a hydraulic assistant driving / braking system for an electric vehicle and a control method thereof, and belongs to the technical field of electric vehicle hydraulic application.The hydraulic assistant driving / braking system comprises motor speed-up mechanisms, rear wheels, a hydraulic valve set, an energy accumulator, an electronic control unit, a power battery, a motor, aplanet gear, front wheels, a drive axle, a fixed-axis gear, a universal joint, a high-pressure variable pump, an oil tank, a brake pedal, an accelerator pedal and a lock. The hydraulic assistant driving / braking system for the electric vehicle and the control method thereof aim at solving the problems that an existing front-drive electric vehicle is low in passing capability on poor roads, insufficient in torque in high-speed overtaking and low in motor braking torque in low-speed braking.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle hydraulic application, and relates to a driving and braking device of an electric-hydraulic hybrid power system, in particular to a hydraulic auxiliary driving / braking system for an electric vehicle and a control method thereof. Background technique [0002] In recent years, with the rapid development of the automobile industry, hydraulic transmission technology has achieved certain results in vehicles, and the application of this technology is mostly concentrated in traditional vehicles. In China, the research on hydraulic technology for vehicles is mostly concentrated in colleges and universities. Jilin University has conducted related research on hydraulic auxiliary drive trucks, which has improved the driving ability of trucks on bad roads; Xiangtan University has proposed an improved vehicle system. Hydraulic retarder with dynamic performance; Foton Lovol launched the country's first...

AI Technical Summary

Problems solved by technology

[0003] Passenger cars mostly use front-wheel drive, which is relatively cheap compared to four-wheel drive vehicles, and the control technology is relatively simple. However, its driving performance is not as good as that of four-wheel drive vehicles.

Whether it is a four-wheel drive vehicle or a front-wheel drive vehicle, when the vehicle is continuously going downhill, there are frequent use of vehicle brakes, which seriously affects the braking stability of the vehicle and reduces the service life of the vehicle brake.

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