Research On The Pressure Control And Parameter Matching Of The Active Pressurized Pedal Stroke Simulator

Along with the development of the nation’s economy.The number of vehicles have experienced explosive growth.It exacerbates the consumption of petroleum energy,on the other hand the vehicle exhaust is harming the environment.So new energy automobiles are becoming the general trend.Many domestic and overseas auto industry magnates,colleges and scientific research institutions keep trying to research on the development tendency of future automobile as well as the correlation field of technology.Regenerative Braking System(RBS)as one of the core technology.When the vehicles brake,RBS can convert part of kinetic energy into electrical energy and stored.In this way,vehicles can increase driving range,reduce fuel consumption and save energy at the same time.Research and development of RBS include control soft research and hardware development.Some Regenerative Braking Systems are developed now domestic and overseas.RBS with the function of active pressurization is able to realize quick response and accurate compensate while RBS needs hydraulic braking pressure.The parameter matching of the components in RBS and the method of pressure control have a direct impact on the vehicle braking performance and the drives’ braking feeling.This paper is based on a type of Electric Vehicle(EV).It researches on the parameter matching of the active pressurized pedal stroke simulator in RBS.And a method of pressure control is presented.The research in this paper is described below:1.Analyze the structure of the software and hardware of a type of EV used in this paper.Analyze the working process of the RBS and formulate the braking force distribution strategy on that basis.A single brake simulation and driving cycles simulation are conducted on the Cruise-Simulink simulation platform.The raking force distribution strategy and the effect of braking energy recovery are verified.2.Analyze the requirement of the solenoid valve and the electric hydraulic pump in the active pressurized pedal stroke simulator.Find out the entrance of parameter matching and present a method of matching,and use AMEsim to build models.Use the AMEsim-Simulink simulation platform to verify the result of parameter matching primarily.3.Combine the result of parameter matching primarily.A pressure control method is presented which is used in RBS with active pressurized pedal stroke simulator.On the basis of braking security,the control method can realize the pressurization function of the pressurized pedal stroke simulator and the coordination of electrical and hydraulic braking force.And ensure the perfect braking feeling of the vehicle.4.According to RBS configuration in a type of EV,set up a hardware-in-loop(HIL)test bench based on xPC Target.Complete the pressurization test of the active pressurized pedal stroke simulator.Result shows that the parameters match of critical components is reasonable and the pressurization ability satisfies the requirement of RBS.In addition,once braking test of RBS is accomplished.Result’ shows the correctness of the pressure control method.It can realize the coordination of electrical and hydraulic braking force based on the braking force distribution strategy.It ensures the smaller pressure deviation and smaller braking severity deviation.That ensure the good braking feeling.