【摘要】 文章在介绍发动机怠速自动起停系统的基础上,制定了怠速自动起停控制逻辑及其实现方法。为了实现ISG电机启动发动机时的最大转矩输出和避免发动机开始点火瞬间的转速波动,ISG电机采用转速、电流双闭环矢量控制,基于滑模变结构控制方法设计了转速调节器和电流调节器。试验结果表明,ISG电机不仅能在规定的时间内高转速启动发动机,而且能避免低温时发动机点火瞬间的转速陡降,ECE工况下的节油率达到了16.91%,NEDC工况下的节油率达到了8.92%。更多还原

【Abstract】 The engine intelligent idling stop and start system is introduced,and the control logic and realization method are proposed.In order to keep the maximum torque output and avoid engine speed large fluctuation at the fire moment,the speed controller and current controller based on sliding mode control with a new variable exponential rate reaching law are designed for the ISG motor.The test results show that under the proposed control strategy,the engine can be started at high speed by ISG motor in requested time without engine speed large fluctuation at the fire moment at extremely low temperatures,and 16.91% fuel saving ratio can be achieved in ECE cycle mode and 8.92% in NEDC cycle mode.更多还原