System for control of vehicle suspension

Details System for control of vehicle suspension System for control of vehicle suspension

1988-11-02

1991-10-15

Chin, Gary

Boots, shoes, and leggings

280707, 280840, 280703, B60G 1700

Patent

active

050580175

ABSTRACT:
In an active suspension control system for a vehicle, a unit for adjusting the distance between each wheel and the body, i.e., a vehicle body height adjusting unit is added to the conventional suspension using a spring and a damper in combination. Since the amount of adjustment to be done by the body height adjusting unit is determined in accordance with the cause of generation of such a vibration of the vehicle as pitching or rolling, the suspension control system further comprises sensors for detecting pitching and rolling angles of the vehicle, respectively, a sensor, associated with each wheel, for detecting a relative displacement in the distance between each wheel and the body and an arithmetic unit, for example, a microcomputer for determining the amount of adjustement by the body height adjusting unit on the basis of the output of each sensor. The arithmetic unit discriminates a cause from predeterminedly sorted causes on the basis of the detected pitching angle, rolling angle and distance displacement and determines a target value of the distance between each wheel and the body, that is, an amount of adjustment by the body height adjusting unit on the basis of the discriminated cause and the distance displacement.

REFERENCES:
patent: 4761022 (1988-08-01), Ohashi et al.
patent: 4789935 (1988-12-01), Buma et al.
patent: 4821191 (1989-04-01), Ikemoto et al.
patent: 4828283 (1989-05-01), Ishii et al.
SAE-Paper No. 840,342, 1985, pp. 741-2.753, "19 4 Continental Mark VII/Lincoln Electronically-Controlled Air Suspension (EAS) System".
Automotive Engineer, vol. 9, No. 1, Feb.-Mar., 1984, pp. 56-57.
"Lotus' Active Suspension", A. Baker, Automotive Engineer, Feb./Mar. 1984.

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