Study On Parameter Matching Based On Vehicle Duty Cycle, Control Strategy And Simulation Software Of Hybrid Electric Vehicle

The Hybrid Electric Vehicles (HEVs) are recognized as one of the most advanced technologies in the automobile industry. HEVs are efficient for solving the world's energy and environmental problems. Nowadays, a series of encouraging policies have been proposed to propell HEV's developing.The vehicle duty cycle is one of the most important issues to parameter matching. However, duty cycle affects HEV performance significantly, but it had not been used in HEV parameter in the literatures. So a method for matching parameter of HEV based on the vehicle duty cycle is proposed. In this paper, the works carried out as follows.In this paper, a new method for parameter matching of HEV based on vehicle duty cycle is proposed. Many duty cycles are carefully statistics, the torque and power requirement are calculated, and the total power of the vehicle,engine power,paramter of the motor are finally definited. At last, taking the novel series-parallel HEV as an example, the HEV's power requirements are calculated according to the theory of automobile dynamics in several typical drive cycles. The HEV's simulation model is also established using the backward simulation tool. Parameters of the powertrain system are chosen carefully by analyzed of the simulated results. At last, the parameters of the system are definited. And taking the CYC_ECE_EUDC cycles and HWFET cycles for example, its simulated results are compare to convention parameter matching method.Second, once the parameters are definited, the model of the vehicle is built and simulated. Also the several control strategies has been analyzed. They have significant influence to the HEV's performance. The HEV's mainly drive mode is analyzed, the mainly control strategy is established. The new control strategy is better than the conventional control strategy .The energy recovery braking in UDDS is improved about 30% compare to the Advisor's recovery strategy.At last, this software is designed in Matlab/Simulink and GUI. It contains series, parallel and others vehicle's model. It can save time by second-develop the software. The research achievements are summarized and the proposal of the next research is put forward.