To reduce fuel cost and vehicle weight, non BSM 3-cylinder engine is increasing, but non BSM 3-cylinder engine has C1 pitch and yaw moment excitation. So compare to 4-cylinder engine vehicle, non 3-cylinder engine vehicle has more NVH problems. In thi...
To reduce fuel cost and vehicle weight, non BSM 3-cylinder engine is increasing, but non BSM 3-cylinder engine has C1 pitch and yaw moment excitation. So compare to 4-cylinder engine vehicle, non 3-cylinder engine vehicle has more NVH problems. In this paper to solve 3-cylinder engine vehicle’s NVH problem, engine exciting force and moment equations were derived. The most effective engine mount design method was selected by engine motion equation analysis. To reduce the engine pitch moment response, engine yaw moment excitation was removed by using outer balancer and the main engine mounts were positioned powertrain pitch axis. To consider engine firing C1.5 roll excitation response, front and rear roll mount span was reduced. The new engine mount system vehicle’s idle vibration was better than 4-cylinder engine vehicle.