Hydropneumatic suspension with variable damping and stiffness

Details Hydropneumatic suspension with variable damping and stiffness Hydropneumatic suspension with variable damping and stiffness

1990-02-12

1992-08-25

Rice, Kenneth R.

Land vehicles

Wheeled

Running gear

280714, 280 612, B60G 1708

Patent

active

051412446

ABSTRACT:
A hydropneumatic vehicle suspension system has a cylinder with an accumulator and a damper at each wheel. There is a supplementary hydropneumatic accumulator for each axle of the vehicle and first and second supplementary dampers connected respectively between the cylinders of the wheels of an axle and the supplementary accumulator. A valve is provided for selectively switching the supplementary accumulators into and out of communication with the cylinders of the corresponding axles. Each supplementary damper has a selectively actuable throttle for varying its damping. A soft suspension is obtained when the supplementary accumulators are switched in, a medium suspension is obtained when the throttles of the supplementary dampers are also actuated, and a firm suspension is obtained when the supplementary accumulators are switched out of the circuit.

REFERENCES:
patent: 3068023 (1962-12-01), Fiala
patent: 4638896 (1987-01-01), Poyser
patent: 4664410 (1987-05-01), Richard
patent: 4773672 (1988-09-01), Deroche

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