Research On Energy Management Strategy With Minimal Equivalent Fuel Consumption Based On Multi-parameters Optimization For Hybrid Electric Vehicle

As energy shortage and environmental pollution phenomenon become more and more serious,fossil fuels,one of the main energy sources,bringing many problems to the society day by day.The cars take the fossil fuels as the primary consumption,which indicates that cars have become a pioneer in technological change.The traditional automobile treats the diesel oil or gasoline as fuel,but their utilization rate are so low,and their discharge of air pollution are so much.The use of electrical energy brought the second industrial revolution,pure electric automobile has swept the world,but in the past long time,the development of battery technology made no great breakthrough,leading to electric car price so expensive,which largely restricted the development of pure electric vehicles.Combining with the problems listed above,hybrid electric vehicle(HEV)arose at that historic moment,the hybrid electric vehicle mainly exploit the balance of the battery energy,so that the engine can be maintained at optimum efficiency operation,which greatly enhance the efficiency of fuel.At the same time,taking advantage of the engine to provide necessary vehicle power demand.In this way,the battery will not be charge and discharge frequently.According to the implementation of this control process to get better fuel efficiency and emission performance,the paper proposes the energy management strategy which basing on multi parameter to reach the equivalent fuel to minimum.This paper systematically analyzed and summarized the current development of hybrid vehicles at home and abroad.Researching series type,parallel type,mix type,and hybrid structures and the energy control strategy of hybrid electric vehicle under different structure.In order to realize the complex multi-mode energy control condition;this paper selects the hybrid structure.According to systematic theory,established the mathematical model of the hybrid system,and include the control of key parts of the model,also contain vehicle model.A strategy based on equivalent fuel consumption minimization,the battery energy consumption is equivalent to the fuel consumption of the engine,getting the actual fuel consumption of the engine,And using the linear weighted method to achieve the engine's fuel consumption and emissions were constructed as a multi-parameter comprehensive evaluation model.To achieve comprehensive optimization of the fuel and emissions performance.Simulation and Analysis on Matlab/simulink,according to the formulation of the control strategy,with meeting the power requirement of the vehicle at the same time,controlling the power output of the engine and the battery,to achieve the optimization of fuel consumption and emission performance goals.The results showed that the model is basically correct,fuel consumption and emissions performance compared to the traditional car has a greater improvement in all aspects of performance.And also emissions performance compared to the traditional ECMS car has a greater improvement.So the content of this paper has a certain reference value for the development of related fields.