Abstract
As the industrial diesel engine has the gear train to drive injection pump and valve system, engine noise is induced by the gear impact at the idling condition. Furthermore, gear impact noise is increased by the torsional vibration of the crankshaft. In this paper, numerical model of the torsional and bending damper for crankshaft is added to the total analytical system to predict the vibratory response and radiated noise of the engine block coupled with the rotating crankshaft and gear trains. The effects of the torsional and bending damper with scarce and sufficient damping to reduce the gear impact force, main bearing forces and engine block vibration are discussed.
