Honda Giken Kogyo Kabushiki Kaisha

Tokai Rubber Industries, Ltd.

Yamashita Rubber Kabushiki Kaisha

Atsushi Sakamoto

Tetsuo Mikasa

Shuji Ohtake

Rentaro Kato

Tatsuya Suzuki

Yasuo Miyamoto

Yuichi Ogawa

Masato Ichikawa

Koji Susa

A vibration-proof mount includes an inner shell member comprised of a center pipe and a bush, and an outer shell member including a first collar and a second collar. The center pipe and the outer shell member are connected to each other by first and second elastomer members with a liquid encapsulated therein. A liquid chamber is formed between the first and second elastomer members and expanded and contracted in volume by a load, and an orifice is defined in the first elastomer member and connected to the liquid chamber. The orifice is formed by only a wall surface of the first elastomer member and hence, the sectional area of a flow path in the orifice can be insured to prevent a difference in characteristic between individuals of the vibration-proof mount, as compared with the case where the orifice is defined between a plurality of members.

Liquid-encapsulated vibration-proof mount device

A fluid-filled elastic engine mount for a motor vehicle having an engine, comprising a first and a second mounting member which are connected by an elastic body that partially defines a pressure-receiving chamber, a flexible diaphragm member which partially defines an equilibrium chamber, and orifice means for effecting fluid communication between the pressure-receiving and equilibrium chambers. The orifice means defines a first and a second orifice passage which are respectively tuned to adjust respective different components of the idling vibrations of the engine, and a third orifice passage which is tuned to a frequency range lower than that of the engine idling vibrations. The orifice means comprises a movable member which partially defines one of the first and second orifice passages which is tuned to adjust one of the different components of the idling vibration whose frequency is higher than the other of the different components, the movable member restricting an amount of flow of fluid through one of the first and second orifice passages. The engine mount further comprises valve means for selectively enabling or disabling both of the first and said second orifice passages simultaneously for permitting or inhibiting the fluid communication between the two chambers.

Fluid-filled engine mount having orifice passages for damping different

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Wako, Japan

Atsushi Sakamoto