Fluid active suspension apparatus and operation control method t

Details Fluid active suspension apparatus and operation control method t Fluid active suspension apparatus and operation control method t

1993-09-17

1995-02-28

Rice, Kenneth R.

Land vehicles

Wheeled

Running gear

280840, 36442405, B60G 1126

Patent

active

053930878

ABSTRACT:
A pneumatic active suspension apparatus is provided wherein, when a sprung vertical acceleration (ZG), which causes a wafting phenomenon perceptible by a person in a vehicle, occurs during travel of the vehicle, supply/discharge of air to/from air spring chambers of suspension units is carried out for a supply/discharge control time determined based on the maximum value (ZGmax) of the sprung vertical acceleration. The supply/discharge control is started at an advanced time based on the sprung acceleration whose phase is advanced by 90 degrees from that of the sprung velocity, to thereby produce a force acting to cancel out the sprung vertical velocity at proper timing. As a result, the operation delay of the suspension apparatus is compensated for and the sprung vertical motion is suppressed.

REFERENCES:
patent: 4977506 (1990-12-01), Hara et al.

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