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Hydraulic engine mount with air bellows tuning

  • US 4,869,477 A
  • Filed: 09/06/1988
  • Issued: 09/26/1989
  • Est. Priority Date: 09/06/1988
  • Status: Expired due to Term
First Claim
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1. A hydraulic mount assembly for a vehicle, comprising:

  • a pair of mounting members;

    a hollow body connected to said mounting members;

    an elastic diaphragm closing said hollow body and forming therewith a closed cavity that is filled with hydraulic fluid;

    means for partitioning said cavity into a primary chamber and a secondary chamber enclosed by said diaphragm;

    an office in said partitioning means connecting said chambers so as to effect damping; and

    a self expanding pneumatic bellows mounted within said primary chamber for controlling the damping and the dynamic rate of said mount assembly on the vehicle at relatively high frequencies of vibration for tuning said mount assembly, said bellows having a self expanding force sufficient to overcome a counteracting elastic force of said diaphragm.

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