Study On Performance Simulation Of Hybrid Electric Vehicle Based On User’s Actual Driving Cycle

Environmental pollution and energy shortage are the two biggest problems in the world’s environmental and energy development.The traditional automobile technology need to reform imminently due to this two problems,so many countries are developing new energy vehicle technologies.At present,the main optimization directions of hybrid vehicles include control strategy optimization,performance matching optimization and Power system structure optimization.In this paper,the performance simulation of hybrid vehicles is carried out by extracting the actual driving cycle,and the control strategy and parameter configuration of hybrid vehicles is optimized.The main research contents and results are as follows:Taking the parallel PHEV light truck which is used to transport goods within a short distance as the research object,by collecting the actual driving data,the research on the actual working condition driving cycle extraction method is carried out,and the method of combination of the characteristic parameters and the velocity-acceleration distribution matrix is proposed to extract the driving cycle of light truck.And the driving cycle analysis tool has been developed using the Matlab.The vehicle power demand bas been obtained by analyzing the actual driving data,and the parameter matching of the light truck bas been researched based on the analysis results.The PHEV vehicle simulation platform has been built using AVL Cruise.And the vehicle control strategy has been developed based on Simulink to optimize the vehicle fuel economy while ensuring the vehicle’s power demand.Using the AVL Cruise and Simulink software to simulate vehicle power system and the result show that the maximum velocity increased by 3%,the maximum grade increased by 26%,and the 0-80km/h acceleration time decreased by 4.8%.The vehicle’s power has been greatly improved.The fuel consumption per 100 kilometers is reduced by 11.7%compared with conventional automobile model,and this prove the PHEV has good fuel economy.The velocity can reach 67km/h when only using the motor to drive vehicle,which can meet the normal driving of the urban roads and this result has meet the design requirements.In the process of simulation,the velocity of the vehicle can follow the cycle’s velocity well and the engine runs in the economical working condition area,which indicates that the developed logic threshold control strategy can effectively optimize the power output of the vehicle power system,which Plays an important guiding role for the development of the final vehicle calibration strategy.