| Because fewer fossil fuels and environmental pollution gradually increased, energy-saving and new energy vehicles now become a hot topic, China’s auto industry will vigorously develop electric vehicles. Pure electric vehicles rely on battery energy storage drive motor, and the process of moving have no exhaust emissions and other pollutants, it can also achieve energy recycling witch help to improve the energy efficiency. For all the reasons given above, pure electric vehicles have broad application prospects.In pure electric city bus development process, a reasonable match for the powertrain system parameters have an important impact vehicle performance. In this paper, pure electric city bus powertrain system as the research object, its main components motor, battery, transmission devices have been introduced. Through analysis and comparison advantages and disadvantages of common motors and batteries, chosen the permanent magnet synchronous motor as a drive motor for pure electric city bus, lithium-ion batteries as the energy storage device for a vehicle, and using the existing transmission system in preliminary match.Based on domestic and foreign-related reference materials, the acceleration performance of the vehicle as the target, completed parameter matching for powertrain system of pure electric city bus. Based on parameter matching for electromotor, cells and driveline, a performance simulation model was developed utilizing ADVISOR, the dynamic simulation software of advanced vehicle simulator. The results of simulation analysis under different drive cycles for the vehicle acceleration performance and driving range proved the parameter matching design was reasonable. To increase the continued running distance of pure electric vehicle and ensure its acceleration performance compliance with design requirements optimized the transmission ratio of the vehicle. Simulation data shows running distance of vehicle was increased, description that the parameters optimization of the vehicle powertrain was reasonable and feasible. |
