전자제어 디젤엔진의 연료압력 레귤레이터 고장진단 제어장치

In an electronic control diesel engine, the fuel pressure control valve is a device to inject a high-pressure fuel constantly corresponding to the set pressure in the ECU. In case of control defective of the fuel pressure regulator in an electronic control diesel engine, it is decreased the performance by rising of the amount of fuel return, thus abnormal phenomenon is occurring such as bad startup, start-up delay, bad acceleration, etc. In this study, the test setup was designed to determine whether the failure of the fuel pressure regulator to investigate the fuel return flow by an electrical signal. As a result, the operation of engine turned off when the fuel pressure down below 125 bar. When the engine speed was 150 rpm, the engine speed increased suddenly due to fail safe function and the vibration of engine was occurred over fuel pressure of 200 bar.