Parameter matching of fuel cell city bus powertrain

The powertrain framework and control strategy of a new model of fuel cell city bus(FCCB) which combines fuel cell with ultracapacitor as the power sources were put forward.Philosophies of matching powertrain parameters are presented.The related parameters of fuel cell,motor,ultracapacitor and the gear ratio of driveline were designed on the basis of theory deduction and engineering analysis.Simulation of the matching was carried out.Efficiency of the powertrain and dynamic performance of the vehicle are confirmed.The method is demonstrated to be feasible and valid.