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 torsional vibration of crank shaft on the impact force and vibration of gear train. Reduction of vibration and noise by changing the location of the gear train from pulley side to flywheel side is discussed.
