Shock Absorber With Frequency Dependent Passive Valve

摘要

A shock absorber has a pressure tube with a piston assembly slidably disposed within the pressure tube and attached to a piston rod. The piston assembly divides the pressure tube into an upper working chamber and a lower working chamber. The piston assembly includes a frequency dependent valve assembly attached to the piston rod which defines a housing attached to the piston rod and a piston disposed within the housing. The piston moves within the housing to control the fluid flow through a bypass fluid passage that bypasses the piston assembly.

主权项

1. A shock absorber comprising:
a pressure tube defining a fluid chamber; a piston assembly disposed within the pressure tube, said piston assembly dividing said fluid chamber into an upper working chamber and a lower working chamber; a piston rod projection out of said pressure tube, said piston assembly being attached to said piston rod; a frequency dependent valve assembly attached to said piston rod, said frequency dependent valve assembly comprising:
a housing assembly attached to said piston rod, said housing assembly defining a fluid chamber;a piston disposed within said fluid chamber;a piston disposed within said fluid chamber;a bypass fluid passage bypassing said piston assembly defined by said housing assembly; wherein movement of said piston within said chamber controlling an amount of fluid flowing through said bypass passage during both a compression and an extension movement of said piston assembly.