Patent ID: 7780154

Claim:
A fluid-filled type engine mount for a vibration damping coupling of two components, comprising: a first mounting member fixable to one of the two components; a second mounting member fixable to an other of the two components; a main rubber elastic body elastically connecting the first and second mounting members which are arranged in a spaced-away fashion; a pressure-receiving chamber whose wall is partially defined by the main rubber elastic body; an equilibrium chamber whose wall is partially defined by a flexible film; an intermediate chamber whose wall is partially defined by a movable film, the pressure-receiving chamber and the intermediate chamber being situated to either side of the movable film, and a non-compressible fluid being sealed within the pressure-receiving chamber, the equilibrium chamber, and the intermediate chamber; a first orifice passage interconnecting the pressure-receiving chamber and the equilibrium chamber, and formed such that a resonance frequency of the fluid caused to flow through the first orifice passage is tuned to that of engine shake; and a second orifice passage interconnecting the intermediate chamber and the equilibrium chamber, and formed such that a resonance frequency of the fluid caused to flow through the second orifice passage is tuned to that of idling vibration, wherein the movable film includes a tabular body composed of a rubber elastic body, and is imparted with non-linear spring properties in response to elastic deformation in a width direction thereof so that deformation of the movable film during input of the idling vibration occurs in a low spring properties zone, whereas deformation of the movable film during input of vibration of greater amplitude than the idling vibration in a higher frequency range than the resonance frequency of the first orifice passage reaches a high spring properties zone.