Hydraulic active suspension system for a vehicle capable of posi

Details Hydraulic active suspension system for a vehicle capable of posi Hydraulic active suspension system for a vehicle capable of posi

1989-12-29

1991-08-27

Black, Thomas G.

Boots, shoes, and leggings

280707, B60G 17015

Patent

active

050438930

ABSTRACT:
In a hydraulic active suspension system, a plurality of actuators having working fluid chambers are provided corresponding to vehicle wheels. Each actuator is adapted to increase and decrease vehicle height as the results of the supply and the discharge of working fluid to and from its working fluid chamber, respectively. Supplying and discharging devices supply working fluid to and discharge from the working fluid chamber. Vehicle height sensors detect the vehicle heights at the locations corresponding to the vehicle wheels. A control device is further provided. The control device controls the supplying and discharging devices so that the pressure within the working fluid chamber in each actuator may be a value corresponding to the sum of a basic pressure determined according to the running conditions of the vehicle and a compensating pressure determined based upon the integral value of the difference between a standard vehicle height and an actual vehicle height. When the integral value of the difference is larger in magnitude than a predeterminate value, it is reduced in magnitude by the control device so as to prevent the control with the compensating pressure from overriding the control with the basic pressure.

REFERENCES:
patent: 4803630 (1989-02-01), Takizawa et al.
patent: 4821191 (1989-04-01), Ikemoto et al.
patent: 4897776 (1990-01-01), Urababa et al.
patent: 4903209 (1990-02-01), Kaneko
patent: 4937748 (1990-06-01), Yonekawa et al.
patent: 4967360 (1990-10-01), Fukunaga et al.
Active Ride Control-A Logical Step from Static Vehicle Attitude Control, M. B. Packer, Society of Automotive Engineers, Inc. 780050.

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