Study On Dynamic System Parameters Matching And Simulation Of HEV At The Xi'an Driving Cycle

As the rapid development of automobile industry and world economy,people meet with environmental pollution problems,the traditional internal combustion engine car can't meet the demand of The Times,so the development of new energy vehicles become the urgent topic.Pure electric vehicles and fuel cell vehicles,although has the characteristics of green environmental protection,due to technical limitations,such as limited driving distance,they don't have a good promotion,relatively hybrid cars both have the advantages of pure electric vehicles and fuel cars.It has the very good prospects for the development of new energy vehicles.This article firstly analyzes the domestic and foreign development situation and the key technology of hybrid cars,comprehensive comparison and analysis the advantages and disadvantages of series hybrid car,parallel and parallel-series type,and combine the characteristics of the working condition of xi 'an driving cycle,the parallel hybrid system is determined.The Jiang'Huai fuel cars as design prototype,it is designed as parallel hybrid electric vehicle,according to the performance requirements of the prototype and the characteristics of the working condition of Xi 'an driving cycle,the text determine the vehicle power performance indexes of the engine,motor,drive train and power battery.The software ADVISOR platform is used to make secondary development of rear wheel driving,and establish the mathematical model of power system components.The Xi 'an circulation condition is developed based on the measured experimental data and the specific development steps is given.Given the shortcomings of parallel electric assist control strategy,the improvement is made,then the text determines the suitable control strategy for the specific conditions.Finally,the rear wheel drive vehicle model is simulated in Xi 'an and UDDS driving cycles,compared with the set goal,the result of simulation shows that this matched powertrain parameters and improvement of the control strategy are reasonable design,achieved the performance expectations.