Abstract
This paper presents the advanced gear impact model to predict the vibratory response and radiated noise of the engine block coupled with the rotating crankshaft and gear train shafts which drives the fuel injection pump and valve system. The simple two pendulums system is employed to measure the impact force with and without oil film. The contact stiffness derived from Hertz's theory and initial deformations at the surface roughness area determine the stiffness at the impact point. In the case that oil film exists at the impact point, the serial connection of oil film damping and contact stiffness is applied to estimate the impact force. The availability of these assumptions are discussed comparing the calculated and measured results.
