混合动力车发动机辅助控制单元开发

Development of Engine Auxiliary Control Unit for Hybrid Electric Vehicle

发动机工作区域优化是混合动力车实现节能的重要手段,应用新一代车用嵌入式控制芯片,开发了混合动力车发动机辅助控制单元,为混合动力车主控制器和发动机控制之间提供了控制接口。辅助控制单元能够完成发动机直接起停控制和发动机实时扭矩、功率控制等功能,并应用SAE J1939协议实现与主控制器之间的CAN通讯。试验结果表明,发动机控制接口设计合理,发动机转矩控制误差小,直接起停控制响应速度快,发动机辅助控制单元软硬件设计满足混合动力总成对发动机控制的要求。

The key way of energy saving is to optimize the working range of the engine of a hybrid electric vehicle. An engine auxiliary control unit was developed with advanced embedded control system in this paper. It can afford the function of engine direct start-stop, the transient torque and power control and the communication with the main control unit through SAE J1939 CAN protocol. The experiment result shows that the design of the engine control interface is reasonable, the error of engine torque is decreased and the response of engine direct start-stop is fast-paced. So the hardware and software design of the engine auxiliary control unit can meet the request of engine control for the hybrid electric vehicle.