Research On Coordinated Control Method Of Whole Vehicle Torque For Plug-in Hybrid Electric Vehicle

Plug-in hybrid electric vehicle(Plug-in hybrid electric vehicle)is a new type of energy vehicle.It has the dual advantages of automobile and hybrid electric vehicle.It is equipped with engine,motor and two power systems.During the whole vehicle driving process,while satisfying the driving mileage and power performance of the vehicle,it reduces the use cost of the vehicle and the dependence on fuel.Therefore,it has attracted widespread attention of automobile enterprises,scientific research institutions and governments of all countries.The formulation of energy management strategy of plug-in hybrid electric vehicle can bring into full play its maximum potential in energy saving.However,the existing energy management strategy does not take into account the driver's driving intention change,nor can it meet the requirements of driving conditions.Therefore,it is of great significance to study the coordinated control of Plug-in Hybrid Electric Vehicle(Plug-in Hybrid Electric Vehicle)in order to meet the driving intent and condition identification,and to promote the economic level of vehicle energy consumption,which has important practical significance.Firstly,the concept of hybrid electric vehicle is introduced,and the development status of hybrid electric vehicle at home and abroad is described in detail.The energy management strategy of hybrid electric vehicle is briefly analyzed.Then,the basic characteristics of parallel hybrid electric vehicle are analyzed from the point of view of dynamic structure.The main components of hybrid electric vehicle are modeled(engine model,motor model,battery model,clutch model,wheel model,etc.).In the process of establishing the model,the fuel consumption,engine emissions,motor power demand,battery charging status and other numerical values are calculated.Thirdly,the driver's intentional behavior is elaborated and analyzed in detail,and the driver's model is established.Considering the influence of driver's operation intention on the torque allocation,and considering the characteristics of fuzzy control,adaptive control and PID control,this paper proposes a "fuzzy adaptive PID" control as the basis of the coordinated torque allocation.Finally,with the help of AVL-Cruise software,the vehicle dynamic model is established.While satisfying the dynamic performance,the fuzzy control strategy and the fuzzy adaptive PID control strategy are simulated and compared under the environment ofMatlab/Simulink with the help of the power tool of MATLAB/API and the working condition of NEDC.The conclusion of this paper is that the fuzzy adaptive PID control strategy can improve the start-up performance.Torque distribution control of machine,ISG motor and drive motor has outstanding effect,and has high energy saving and emission reduction effect.