Parameters Matching on Engine and ISG Motor for City Bus

In urban conditions, vehicles fuel consumes greatly in the idle condition, and vehicles start and stop frequently. The control of engine rapid start and stop is completed using ISG, and the abolition of engine idling condition. In order to improve fuel economy and start-up performance, the structure of city bus powertrain was made better through analyzing start and brake, and the parameters matching on engine and ISG was designed. The simulation analysis of vehicle performance is done to determine the parameters of the components by using the ADVISOR software, and which is simulated under urban 4 drive cycle and 6 drive cycle. The results show that the improved structure meets the performance requirements of the vehicle starting, and fuel economy increased 10.51% and 9.46% respectively.