Spring devices – Vehicle – Comprising compressible fluid
Patent
1986-12-12
1988-05-03
Halvosa, George E. A.
Spring devices
Vehicle
Comprising compressible fluid
188312, 267217, 280709, F16F 500, B60G 1126
Patent
active
047415169
ABSTRACT:
A vehicle with a suspension system having a compressible liquid confined in a cylinder and compressed to a predetermined static pressure. A damping piston is disposed on a double ended rod where the rod ends have different cross sectional areas to provide a differential area which is acted on by the liquid to spring support the weight of the vehicle. The end of the larger rod is connected to the vehicle chassis and bearings in each end of the cylinder transfer high bending moments due to wheel loads. Friction is reduced by eliminating contact between the large diameter piston and cylinder, and limiting frictional contact to the relatively small diameter of the bearings and seals. Total fluid volume is increased to provide a lower spring rate by a fluid chamber within the rod, and an apparatus is provided to control ride height by changes in liquid pressure and/or volume which also changes spring rate. An apparatus is also provided for adjusting damping and thus effective spring rate from the fixed end of the rod.
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"Active suspension wins big-league adherents", by David Scott, Automotive Engineering, Sep. 1986.
Halvosa George E. A.
LiquidSpring Investors, Ltd.
Oberleitner Robert J.
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