Engine power distribution system for four-wheel drive autonomous electric vehicle

Abstract

Nowadays, there is an active stage of development of advanced energy-saving technologies in the field of automotive industry, and therefore, electric vehicles are becoming increasingly popular. One of the main indicators of the efficiency of autonomous electric transport is the power reserve, the increase of which can be achieved by reducing the weight of the vehicle. In classic cars, the torque from the internal combustion engine is passed to the wheels by means of a transmission. In electric vehicles, due to the use of motor wheels, there is no need for a transmission, which significantly reduces the weight of the construction, as well as reduces maintenance and repair costs. The article considers the issue of power distribution of engines of an autonomous electric vehicle based on four-wheel hub motor. A mathematical description of an electronic differential for an electric car based on two and four motor wheels based on the Ackerman control principle is also obtained. A digital simulation of the four-wheel drive electric vehicle system was carried out in the MATLAB/Simulink software. Transients are obtained in terms of the speed of rotation of the engine shaft and the torque on the engine shaft, which satisfy the requirements for overregulation and quickness of the system.

Keywords

• Electronic differential
• Vector control
• Electric vehicle
• Simulation modeling