Patent ID: 7097168
Filing Date: 2006-08-29
Classification: F16F

Abstract:
1. A fluid filled engine mount for an automotive vehicle, comprising: a first mounting member; a second mounting member disposed spaced away from the first mounting, member; an elastic body for elastically connecting the first mounting member and the second mounting member; a pressure-receiving chamber filled with non-compressible fluid and partially defined by the elastic body so as to excite fluid pressure fluctuation upon input of vibration; an equilibrium chamber filled with the non-compressible fluid and partially defined by a flexible layer so as to permit change in volume; an orifice passage for connecting the equilibrium chamber to the pressure-receiving chamber, and tuned to a frequency band of engine idling vibrations; an orifice control member operable by means of negative pressure exerted from an external space so as to restrict flow of the fluid through the orifice passage when an absolute value of the exerted negative pressure is greater than a predetermined value; a negative pressure conduit of direct connection type, adapted to always introduce negative pressure available from an air intake port of an internal combustion engine to the orifice control member; a rubber elastic plate partially defining the pressure-receiving chamber; and a working air chamber formed on an opposite side across from the rubber elastic plate in relation to the pressure-receiving chamber, and adapted to function as the orifice control member, wherein the negative pressure conduit is directly connected to the working air chamber so that the rubber elastic plate is suctioned to be held in contact with an interior face of the working air chamber to restrict a motion thereof when the vehicle is in an engine idling condition thereof, and is moved awa from the interior face of the working air chamber so as to be elastically deformable due to an elastic resiliency thereof, when the vehicle is in a non-idling condition.