柴油机喷油器启喷压力无损检测方法研究

柴油机的燃油喷射压力直接影响到柴油机的燃烧性能。但是随着柴油机使用期的增长，启喷压力会逐渐降低，导致燃烧过程恶化，经济性下降。在柴油机喷油泵试验台上进行改变喷油器启喷压力的试验，测取了不同启喷压力下的高压油管振动信号，并利用振动信号对启喷压力的不解体检测方法进行了研究，提出了启喷压力的识别准则。

Study of Nondestructive Measurement for Fuel Starting Injection Pressure in Diesel Engines

The fuel injection pressure in a diesel engine reflects the combustion performance directly. But the fuel starting injection pressure will turn low gradually when the operational time of the diesel engine increases. This will cause worsening of the combustion process and fuel economy. This paper has measured the vibration signals from the high pressure line in the tests of changing the fuel starting injection pressure, and studied the method in the way that can measure the fuel injection pressure nondestructively using the vibration signal from the high pressure line, and put forward a criterion to recognize the fuel starting injection pressure.