A literature review of automotive vehicle engine mounting systems

The ideal engine mount system should isolate engine vibration caused by eng ine disturbance force in engine speed range and prevent engine bounce from shock excitation. This implies that the dynamic stiffness and damping of th e engine mount should be frequency- and amplitude-dependent. The developmen t of engine mounting systems has mostly concentrated on improvement of freq uency- and amplitude-dependent properties. The conventional elastomeric mou nts do not meet all the requirements and can only offer a trade-off between static deflection and vibration isolation. Passive hydraulic mounts can pr ovide a better performance than elastomeric mounts especially in the low fr equency range. Semi-active techniques are usually used to further improve p erformance of hydraulic mounts by making them more tunable. The active engi ne mounting system can be very stiff at low frequency and be tuned to be ve ry soft at the higher frequency range to isolate the vibration. The active engine mounts have been considered as the next generation of engine mounts. The optimization of engine mounting systems is quite desirable. The curren t work on the optimization of the engine mount systems shows some limitatio ns. (C) 2000 Elsevier Science Ltd. All rights reserved.