Analysis Of Drive Control Strategy And Energy Management Strategy For Pure Electric Vehicle

At present,people are increasingly demanding for the environment and living pressure.Traditional fuel vehicles can not fully meet people's demand for a better environment and low consumption costs.Pure electric vehicles have the characteristics of clean,pollution-free and excellent economic performance,which is one of the main directions of future development of automobiles.But as far as pure electric vehicle technology is concerned,driving control strategy and energy management strategy are one of the key factors restricting the development of pure electric vehicle.The main purpose of this paper is to better understand the development status and technology of global pure electric vehicles and to develop vehicle models with excellent performance.The research contents of this paper are as follows:1)The whole analytical process of benchmarking vehicle is described in detail,and the testing equipment and methods are introduced.2)Analysis of Benchmarking Vehicle Driving Control Strategy: Starting Control Strategy of Benchmarking Vehicle is analyzed from two aspects of creeping start and accelerating start.The analysis of starting control strategy covers two situations: flat start and ramp start.Then,the driving control strategy of Benchmarking Vehicle in driving process is analyzed from two aspects of vehicle dynamics and driving control strategy under different driving modes.?3)Benchmarking vehicle energy management strategy analysis: first,from the taxiing energy recovery and braking energy recovery two aspects of analysis;then in the NEDC and WLTC two working conditions were tested and the test data were analyzed;finally,the benchmarking vehicle battery management strategy under different charging conditions was analyzed.4)Summarize and optimize the driving control strategy and energy management strategy of competitive vehicles,and develop the model and build the energy flow model.Among them,the driving control strategies include: acceleration intention recognition,torque compensation,acceleration pedal control characteristics,fuzzy control and so on;energy management strategies include braking force distribution,energy recovery strategy under different charging conditions,integrated energy management control strategy for driving and accessories;finally,energy flow test scheme is formulated,energy flow mathematical model is established,and vehicle is formulated.Evaluation method of energy consumption.5)Model building and vehicle verification: Firstly,the acceleration pedal control characteristics,acceleration intent control strategy and torque compensation strategy of the test vehicle are verified;secondly,the distribution strategy of motor and hydraulic brake of the test vehicle is validated from the perspective of energy management,and the energy recovery efficiency is calculated;finally,the energy flow test of the test vehicle is carried out,and the vehicle energy is constructed.The flow model is used to analyze the energy flow efficiency of components and systems.