Patent ID: 8157250
Filing Date: 2012-04-17
Classification: F16F

Abstract:
1. An hydraulic mount, comprising: a main resilient element; an upper fluid chamber; a top plate adjoining said upper fluid chamber; an idle inertia track formed in said top plate, said idle inertia track communicating with said upper fluid chamber; an idle fluid chamber communicating with said idle inertia track opposite with respect to said upper fluid chamber; an idle diaphragm adjoining said idle fluid chamber; an hydraulic fluid filling said upper fluid chamber, said idle inertia track and said idle fluid chamber; an idle air chamber adjoining said idle diaphragm oppositely disposed with respect to said idle fluid chamber; and an air conduit assembly comprising a tunable air conduit communicating with said idle air chamber, wherein said air conduit is connectable to the atmosphere via said air conduit assembly; wherein with the tunable air conduit open to the atmosphere, the idle inertia track is resonance tuned, in responsive combination with resilient deformation of the main resilient element and the idle diaphragm, to provide a first idle rate dip of dynamic stiffness; and wherein with the tunable air conduit open to the atmosphere the tunable air conduit is resonance tuned to provide a second idle rate dip of dynamic stiffness.