Study On Powertrain Control Tactics Of Electric Bus Oriented The Acceleration Process

Because of the characteristics of energy saving and emission reduction of new energy vehicles, electric bus(EB) has become the main tool of urban public transport. However, the current commonly used the powertrain control strategy of EB ignore the role of the relationship between the driver’s intention and the vehicle energy consumption during acceleration, which bring about the problem of power and economy become worse. Therefore, based on a EB in Guangzhou city as the research object, the powertrain control tactics of EB for accelerating process is studied, in order to improve its economy and power comprehensively.First of all, the current research status of the powertrain control strategy of electric vehicles at home and abroad is introduced; meanwhile, the commonly used control strategy of EB is analyzed. And then, the relationship between the driver’s intention and speed curve of the acceleration process is studied as well as the effects of different accelerated process speed curve on the vehicle power and economic performance are discussed, on the basis of this, the powertrain control tactics of EB for acceleration process is proposed.A fuzzy controllor is designed based on driving intention identification, and different control modes have been set according to the driving intention to improve the dynamics and economy of the entire acceleration process; use the dynamic and economic indicators as the optimization targets to optimum the acceleration process velocity curves; depending on the control mode corresponding to the optimum acceleration process velocity curves design a corresponding adjustment of the driving torque control strategy. Then, a powertrain control system and a vehicle model are established by MATLAB/Simulink, and AVL Cruise, and simulated under the test conditions, and compare the simulative results, such as energy consumption and accelerating performance. Finally, an experimental platform was built to verify the feasibility of powertrain control tactics based on the NI PXI I/O hardware, inverter, three-phase asynchronous motors and other equipment.