Diesel engine fault detection method and device, power device and medium

The invention discloses a fault detection method and device for a diesel engine, a power device and a medium. In the application, the rail pressure signal of the engine in the running process can be monitored in real time; fourier transform is carried out on the rail pressure signal to obtain a conversion signal; and determining whether the diesel engine has a fault event based on the conversion signal. According to the technical scheme, whether the diesel engine has an abnormal fault event or not can be judged in real time by processing the rail pressure signal through Fourier transform and combining the frequency spectrum of the normal signal obtained after Fourier transform is conducted on the normal rail pressure signal. Therefore, the high-frequency rail pressure fault and the oil injection cylinder fault can be accurately judged. 本申请公开了一种柴油机的故障检测方法、装置、动力装置及介质。本申请中，可以实时监测发动机在运行过程中的轨压信号；将轨压信号进行傅里叶变换，得到转换信号；基于转换信号，确定柴油机是否存在故障事件。通过应用本申请的技术方案，可以根据利用傅里叶变换处理轨压信号，并结合对正常轨压信号进行傅里叶变换后的正常信号的频谱，来实时的判断柴油机是否存在异常故障事件。从