Review of automotive vehicle engine mounting systems
by Yunhe Yu, Nagi G. Naganathan, Rao V. Dukkipatit
International Journal of Vehicle Design (IJVD), Vol. 24, No. 4, 2000

Abstract: The ideal engine mount system should isolate engine vibration caused by engine disturbance force in engine speed range and prevent engine bounce from shock excitation. This implies that the dynamic stiffness and damping of the engine mount should be frequency and amplitude dependent. The development of engine mounting systems has mostly concentrated on improvement of frequency and amplitude dependent properties. The conventional elastomeric mounts do not meet all the requirements and can only offer a trade-off between static deflection and vibration isolation, but there is still some room for improving the properties of elastomeric mounts. Passive hydraulic mounts can provide a better performance than elastomeric mounts especially in the low frequency range. Semi-active techniques are usually used to further improve performance of hydraulic mounts by making them more tunable. The active engine mounting system can be very stiff at low frequency and be tuned to be very 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 optimisation of the engine mounting system is quite useful both in terms of speed and more effective design. The current work on optimisation of the engine mount systems shows some limitation. Further work is needed to consider the nonlinear variations in properties of different types of mounting systems.

Online publication date: Fri, 10-Sep-2004

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