중형 트럭 KEY ON/OFF 시 엔진 마운팅 진동 해석

The vibration of a vehicle, which is caused by and transmitted from the engine, has significant effect on the ride comfort and the dynamic characteristics of the engine mount system have direct influence on the vibration and noise of the vehicle. This paper examines the body shake caused by the engine excitation force on engine key on/off of a heavy truck by experiment and simulation. The analysis model consists of the engine, body including frame, front and rear suspensions and tires. The force element between body and suspension is modeled as a combination of suspension spring and damper, and the unsprung mass has roll and pitch. The engine shake obtained from experiment was compared with the result of computer simulation, and by using the verified computer model, parametric study of the body shake on engine key on/off is performed with changing the stiffness of engine mount rubber, the engine mount angle, and position of engine mounts.