Abstract
This paper presents the theoretical procedure 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 exciting forces acting on the engine block and shaft system are combustion pressure, inertia forces of the moving parts, piston slap forces, fuel injection pressure and valve driving force and torque. This method is applied to estimate the effect of the backlash of the gear train on the gear impact forces, engine block vibration and radiated noise. The calculated results are compared with measured ones and the availability of this analytical method is discussed.
