一种共轨喷油器故障诊断策略开发

Development of a Diagnostic Strategy for Common Rail Injector

介绍了一种根据轨道内压力变化特征对共轨喷油器故障进行诊断的开发过程。提取喷油器的每次喷射动作在轨道内引起的压力变化特征,并考虑发动机转速、冷却水温度、燃油喷射模式等多个影响因素后形成诊断策略在MATALB/Simulink环境中建立模型,结合CANape/Simulink工具包优势对算法进行了快速原型台架验证和数据标定,开发过程简洁,结果能够满足喷油器在发动机运行工况下的实时检测要求。

This paper introduces the development process of a diagnostic strategy for high pressure common rail injector based on the pressure wave of the common rail. The characteristics of the pressure wave triggered by every injection action are obtained and analyzed while some important factors such as engine speed, coolant temperature, fuel injection mode are also taken into account. A diagnostic model is built on simulink and emigrated to CANape platform. The model is verified on experiment rig after necessary data got. The whole development process is efficient and test results indicate that it satisfies the real time diagnostic need.