Patent ID: 8342285
Filing Date: 2013-01-01
Classification: B60K,F16F

Abstract:
1. A hydraulic torque strut for a motor vehicle powertrain mounting system, said hydraulic torque strut comprising: a liquid; a head comprising an outer sleeve, said outer sleeve comprising a curvilinear sleeve wall; a liner disposed within, and in spaced relation to, said outer sleeve, said liner comprising a curvilinear liner wall disposed in complementing, spaced relation to said curvilinear sleeve wall; an overmold comprising a main rubber element having a first side and an opposite second side, wherein distal ends of said main rubber element are stationarily disposed with respect to said liner; a pumping chamber filled with the liquid and disposed at said first side of said main rubber element, wherein said second side of the main rubber element is exposed to the atmosphere; a compensating chamber filled with the liquid; a flexible bellows elastically separating said compensating chamber from the atmosphere; an inertia track filled with the liquid and extending between, and hydraulically communicating with, said pumping chamber and said compensating chamber; a decoupler system filled with the liquid, said decoupler system comprising: a decoupler track filled with the liquid and extending between, and hydraulically communicating with, said decoupler system and said compensating chamber; wherein for low amplitude vibration of said main rubber element with respect to said liner, not more than minimal hydraulic damping and stiffness is provided via said decoupler track, absence of said compliant membrane occluding the perforations of the first and second perforated decoupler sidewalls and free movement of said compliant membrane responsive to said low amplitude vibration; and wherein for high amplitude vibration of said main rubber element with respect to said liner, hydraulic damping and stiffness greater than the minimal hydraulic damping is provided via said inertia track and said compliant membrane occluding the perforations of one of the first and second perforated decoupler sidewalls responsive to the high amplitude vibration.