Abstract
An engine mount is developed which is consisting of a fluid filled rubber mount stacked with a variable spring absorber. In the engine mount, the transmissibility due to mass vibrations should be small, and high frequency sound noise should be isolated. In this mount, the high frequency noise is isolated by a fluid filled rubber mount. It is difficult to suppress both mass vibrations and its transmissibility to the base simultaneously. By suppressing both, this article applies an anti-resonance control. In order to create the anti-resonance, a new type tunable absorber using conical helical spring is developed, and its control method is presented. Using our mount, both the mass vibration and transmissibility can be suppressed, and the amplitude ratio and the transmissibility can be controlled to be less than one which will be difficult to be achieved in the previous mounts. Our mount has other advantages on its compact size, small control energy and simple control system.
