Method and apparatus for dynamic leveling of a vehicle using an

Details Method and apparatus for dynamic leveling of a vehicle using an Method and apparatus for dynamic leveling of a vehicle using an

1992-03-16

1993-07-27

Lall, Parshotam S.

Boots, shoes, and leggings

280707, 280714, B60G 17015, B60G 17056

Patent

active

052315835

ABSTRACT:
A method and apparatus for dynamically leveling the attitude of a vehicle using a low power fully active suspension system. The suspension system includes a hydraulic actuator operably connected at each corner of the vehicle between sprung and unsprung portions thereof, sensors for detecting movement of the sprung and unsprung portions of the motor vehicle and for deriving a force signal for each actuator in response thereto, and a valving arrangement for causing the hydraulic actuator to generate a desired output force in response to the force signal. The valving arrangement has a first valving that is operable for generating the output force by selectively varying the damping characteristics of the hydraulic actuator when the force signal is within a predetermined range. The valving arrangement also includes second valving for selectively controlling the supply and discharge of hydraulic fluid between the hydraulic actuator and a fluid pressure source for generating the output force when the force signal is outside of the predetermined range. Thus, the lower power fully active suspension system is adapted to produce the desired output force through selective actuation of the first and second valvings for limiting the duty cycle and power requirements of the fluid pressure source.

REFERENCES:
patent: 4898257 (1990-02-01), Brandstadter
patent: 5062660 (1991-11-01), Satoh et al.
patent: 5082309 (1992-01-01), Schutzner et al.
patent: 5089966 (1992-02-01), Fukushima et al.
patent: 5097419 (1992-03-01), Lizell

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