Simulation Analysis For Powertrain System Characteristic Of Fuel-cell Extented-Range Commecial Vehicle

Research of fuel cell extended-range vehicles is a significance part of research, development of electric vehicles. In the powertrain system of fuel cell extended-range vehicles, there is only electric energy produced, fuel cell extended-range vehicles achieve zero emission load. Based on the study of the structure characteristics of fuel cell extended-range vehicles, an indirect parallel structure "FC+B" for the fuel cell extended-range vehicle powertrain system is determined. Components selection analyzing and matching calculation is based on this powertrain system.According to the features of fuel cell extender and characteristics of the powertrain system of the commercial vehicle, a principle of the extender control strategy is determined the designed. On-off control strategy, power following control strategy and fuzzy logic control strategy are compared and analyzed. An on-off with following control strategy is built which is used for extender controller, then a research of fuzzy algorithm of following control strategy is designed.Processing technique of simulation analysis for the powertrain system of fuel cell extended-range vehicles is conveyed. Based on the structure of the commercial vehicle powertrain system, Cruise/Simulink combined powertrain system simulation model is established. According to the math principle of the fuel cell, a simulation model of fuel cell extender is built by Simulink software. Extender control strategy demands fuel cell switch state and control output power from fuel cell according to the SOC of the power battery and threshold of fuel cell in the controller model. Stateflow is used to process the switch/power follow control strategy. Controller model also includes a fuzzy controller in order to convey the fuzzy algorithm.Based on the model which has been verified of the 1 fuel cell extended-range vehicle and the control strategy in the simulation platform, dynamic performance and economic performance simulation analysis is accomplished. According to the simulation analysis of control strategy, the fuzzy algorithm will help improve the overall performance of the vehicle. The optimization analysis for the selection of powertrain parameters of fuel cell extended-range vehicle is given and through the simulation analysis, the most optimal solution is determined.