Liquid-encapsulated bushing

Details Liquid-encapsulated bushing Liquid-encapsulated bushing

1998-06-01

1999-09-07

Schwartz, Chris

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

267293, F16F 500

Patent

active

059474548

ABSTRACT:
To achieve a lowering of a dynamic spring constant in an air column resonance region of a tire without increasing the hardness of an elastic body of a liquid-encapsulated bushing, an outer tube and an inner tube are connected by a bushing rubber. Front liquid chambers and rear liquid chambers are placed in communication with each other by first communication passages. The upper liquid chambers and the rear liquid chambers are placed in communication with each other by second communication passages and a third communication passage. If a load of 80-250 Hz is input in a Z-Z' direction, the peak of the dynamic spring constant is shifted toward a higher-frequency side by the third communication passage and a dynamic spring constant in the air column resonance region (220-250 Hz) of a tire is lowered, thereby reducing road noise.

REFERENCES:
patent: 5221077 (1993-06-01), Noguchi
patent: 5509643 (1996-04-01), Carstens et al.
patent: 5690320 (1997-11-01), Kanda

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