Control system and method for electric vehicle

Abstract

The invention relates to a control system and method for an electric vehicle. The system comprises a vehicle control unit, a rear driving motor, a rear driving motor controller, an automatic transmission, a first hub motor, a second hub motor, a first hub motor controller, a second hub motor controller, a sensor module, a battery and motor high-voltage power supply device and a power source management system, wherein the rear driving motor is mechanically connected with two rear wheels through the automatic transmission, the automatic transmission is integrated in the rear driving motor and connected with the two rear wheels through a driving axle, and the first hub motor, the second hub motor, the first hub motor controller and the second hub motor controller are installed in hubs of two front wheels correspondingly. The two front wheels can be controlled independently and do not slip, and thus tire abrasion is reduced. The rear driving motor integrated with the automatic transmission is adopted, the rear driving motor is made to work in a high-efficiency zone, the service life of the rear driving motor is prolonged, and the mileage is increased. Four-wheel driving is adopted so that emergency acceleration can be achieved. Motor auxiliary braking control is adopted, so that the braking performance of the whole vehicle is improved. Energy loss is reduced by recycling braking energy.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to an electric vehicle control system and method. Background technique [0002] At present, automobiles have gradually become an indispensable means of transportation and transportation in life. However, the energy crisis and environmental pollution caused by traditional internal combustion engine vehicles have become increasingly prominent. Electric vehicles have become an effective way to solve this problem. [0003] At present, there are many electric vehicle control systems on the market, most of which are driven by one motor or driven independently by two hub / side motors. Based on a motor-driven vehicle control system, although the control method is extremely simple, due to the small motor torque, the power performance of the vehicle is poor. Motor life. Based on the vehicle control system independently driven by two hub / side motors, although the two mot...

AI Technical Summary

Problems solved by technology

The advantage of this invention is that it can independently drive the left and right wheels in the front wheel or the rear wheel; the problem is that the front wheel and the rear wheel cannot be driven at the same time, and the motor cannot be guaranteed to work in the high-efficiency operating area all the time, which affects Motor life, battery power consumption

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