Nissan Motor Company Limited

Kazuro Iwata

Naoto Fukushima

Kunihiko Hidaka

Toji Takemura

A shock absorber assembly for an automotive vehicle suspension prevents transmission of vibrations such as road shocks. The shock absorber assembly has a resiliently shock absorbing spring seat retaining a suspension coil spring. The spring seat is adapted to absorb relatively low-amplitude, high-frequency vibrations and thus prevent the shock absorbing assembly from surging. The spring seat has resilient characteristics in which the minimum damping force occurs at a position normally maintained by the vehicle and in which the spring seat becomes rigid in response to relatively high-amplitude vibrations.

Shock absorber assembly for automotive vehicle suspension

A vortex flow hydraulic shock absorber for damping relative displacement of two components comprising a piston provided with a fluid passage therethrough including a pair of vortex chambers formed in a movable valve body disposed between a pair of resilient annular discs in a valve chamber in the piston. The valve body moves against the force of the resilient annular discs in response to an increase in the pressure difference of the working fluid on opposite sides of the piston to positions in which the fluid is permitted to bypass one or both of the vortex chambers as it traverses the piston, thereby varying the damping force of the shock absorber.

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Zushi, Japan

Kazuro Iwata