Land vehicles – Wheeled – Running gear
Patent
1995-12-28
1997-08-26
Rice, Kenneth R.
Land vehicles
Wheeled
Running gear
B60G 1126
Patent
active
056604114
ABSTRACT:
An automotive active suspension system according to this invention uses valves of a simplified structure so that the availability of installing space is improved and energy consumption is reduced by decreasing the quantity of the returned fluid.
This invention comprises a hydraulic pressure creating/supply apparatus; hydraulic actuators arranged between each wheel and body; wheel pressure control valves for proportionally controlling the pressure applied to each hydraulic actuator; main line pressure control valves arranged between said hydraulic pressure creating/supply apparatus and said wheel pressure control valves to control the main line pressure supplied through main lines; a predetermined pressure-maintaining valve which is located in a return line to said hydraulic pressure creating/supply apparatus from said wheel pressure control valves to receive a pilot pressure passing through said main line pressure control valves; and a relief valve which is located in a line connecting the upstream line of said main line pressure control valves and the downstream line of said predetermined pressure-maintaining valve in order that a bypass line of said main line pressure control valve is connected to the downstream line of said relief valve.
REFERENCES:
patent: 5239471 (1993-08-01), Takahashi
Keschner Irving
Mando Machinery Corporation
Rice Kenneth R.
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