Research On Power Matching And Control Strategy Of Extended Range Electric Vehicle

From the beginning of the industrial revolution,such as environment and energy issues made people to think about energy conservation and emission reduction.The development of traditional internal combustion engine vehicles has greatly exacerbated the impact of environmental pollution and greenhouse effect.Instead of traditional non-renewable energy sources,new energy vehicles using clean energy such as batteries or fuel cells can not only solve the problem of lack of energy,but also reduces environmental pollution.Pure electric vehicles using batteries as a power source can achieve zero emissions,but it has shortcomings of high battery costs and short driving range.The engine used in extendedrange electric vehicle does not drive the car directly,so it can work in the high-efficiency range.The extended-range electric vehicle can reduce the fuel consumption rate and emissions.It achieves the purpose of energy conservation and emission reduction.This article mainly introduces the power system selection and control strategy development of the front and rear axle independent drive extended-range electric vehicles.The front and rear axles of the vehicle are each connected with a drive motor,and a main reducer and a dual drive are installed between the front and rear axles and the drive motor.The motor can be driven independently of the front and rear axles.This article will match the parameters of the dual-drive motor,range extender(enginegenerator set),main reducer and power battery according to the vehicle performance index;then analyzing the structure of the whole vehicle and the working mode of the vehicle,specifically from the drive,brake and the taxi mode controls the vehicle.In the control strategy,the engine makes the engine work at different optimal fuel consumption points according to the required power of the vehicle and avoids the frequent start of the engine-generator;the joint simulation model is established to verify that the vehicle can reach expected performance indicators,motor rated power to meet the needs of the maximum speed of 30 min,the vast majority of the work point of the coworker engine is near the preset three optimal operating points,the design of the vehicle can achieve the desired power performance and comparison Good fuel economy.