空气辅助缸内直喷发动机正时控制策略

针对某型空气辅助缸内直喷发动机,设计了曲轴位置传感器,研制了发动机的电子控制单元(electronic control unit,ECU).在此基础上,着重研究了空气辅助缸内直喷发动机的正时控制策略,包括软件正时、空气辅助喷油正时和点火正时.为了实现发动机正时的精确控制,提出了"数齿延时"控制方法.仿真试验和台架试验表明:基于自开发电子控制单元的空气辅助缸内直喷发动机正时控制策略准确可行. 

Timing control strategies of air-assisted direct injection engine

The electronic control unit and crankshaft position sensor for a air-assisted direct injection engine were designed and developed. On this basis, the timing control strategies of the air-assisted direct injection engine were presented, including software timing, air-assisted fuel injection timing and ignition timing. In order to achieve the precise control of the engine timing, a method of "count teeth delay" control was proposed. Simulation and bench test show that the timing control strategies based on the self-developed electronic control unit for air-assisted direct injection engine are accurate and feasible.