Hydro-pneumatic vehicle suspension system with a double acting cylinder and accumulators
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United States of America Patent
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-
Mar 3, 2009
Grant Date -
Dec 6, 2007
app pub date -
Jun 2, 2006
filing date -
Jun 2, 2006
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A suspension system dampens motion between two components of a vehicle, such as the wheels and the chassis. An assembly of a cylinder and a piston is connected to both components. The piston defines first and second chambers in the cylinder and has a shaft with an end surface exposed to pressure within a third chamber of the cylinder. A first accumulator is connected to the first chamber by a first accumulator valve and a second accumulator valve connects a second accumulator to the second chamber. A damping valve alternately connects the third chamber to either the second chamber or a fluid tank wherein that connection defines the stiffness of the suspension system and is made in response to force acting on the suspension system. A load leveling circuit also is described.
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