The High Pressure Common Rail Diesel Engine Monitoring Strategy Research And Development

The more severe requirements have been put forward beacause of the increasing scarcity of world energy and increased pollution. Therefore, the high-pressure common rail electronic controlled fuel injection system with higher power,better economy and lower exhaust gas emission was emerged as the times require and developed at very fast speed. Because of the poor running conditions, the complex and changeable working environment and the multitudinous components of the engine, the failure was ever-present. Along with the rapid development of electronic control technology, the control of the engine was more accurate. So the failure rate of the engine was decreased. But once the engine went wrong, it required the higer technology support to define what the failure was and made the proper treatments. Therefore, it is.necessary to research the fault diagnosis system of the high-pressure common rail diesel engine largely and deeply. As the forward and the key part of the fault diagnosis system, the fault monitoring system takes charge defining the state of the faults.Based on the high-pressure common rail electronic controlled fuel injection system, the research trends and the development history of the high-pressure common rail diesel engine fault monitoring system was analyzed and the control strategies for the fault monitoring system was put forward by the way of layer concept. On the basis of deeply understanding the system design concepts and by combining control theory, singlechip principle and C language, the fault monitoring control strategies was empoldered through the layer concept ways which included the ecumenic. components monitoring, function monitoring and the correlative hardware tests.The ecumenic components monitoring was aimed at the faults applicable to both or all and the universal modules was advanced.The function monitoring was with responsibility for the monitoring of the injector energising time on specific operating conditions. The hardware tests mainly monitor the important hardware function such as memory, ADC and TPU and so on. By using ASCET software development platform of ETAS, software design, simulation and automatic code generation were completed. And the simulation results have been analyzed and sumed up deeply and systematically. Consequently the development of the control strategies for the fault monitoring system has been completed.