Vibration detection & diagnosis for high-pressure fuel pipe of diesel engineer

Abstract

Some information, which is not the same as the traditional cause of vibration of diesel engine's high-pressure fuel pipe is given by the use of modern detection technology. From the information & theory analysis, the real cause of vibration of high-pressure fuel pipe is found. The cause is elastic deformation of the pipe. High-pressure of fuel in the course of fuel injection makes the pipe's cross section get elastic deformation and then the curvature of pipe get elastic deformation. That is to say, the real cause is Bourdon Effect of pipe. In the view of energy, the relations of the energy between pressure energy of fuel, strain energy & elastic energy of pipe are described. So the vibration of the high-pressure pipe is caused mainly by the Bourdon Effect, and is one of the main causes of fuel injection system fault.