Electrohydraulic steering system

Details Electrohydraulic steering system Electrohydraulic steering system

1995-04-28

1996-05-28

Focarino, Margaret A.

Motor vehicles

Steering gear

With fluid power assist

180432, 60444, B62D 509

Patent

active

055202624

ABSTRACT:
An electrohydraulic steering system has a three position pilot operated directional valve disposed between a variable displacement pump and a pair of steer cylinders. The directional valve controls the direction of fluid flow from the pump to the steer cylinders while the displacement of the variable displacement pump is controlled to vary the rate of fluid flow to the steer cylinders. The directional valve is moved to an on position in response to a pilot signal delivered thereto from a pilot valve device while the displacement setting of the variable displacement pump is varied by an electrical signal delivered to a displacement controller from a position sensor mechanism.

REFERENCES:
patent: 3439768 (1969-04-01), Medley
patent: 3872773 (1975-03-01), Denker
patent: 4914913 (1990-04-01), St. Germain et al.
patent: 5020618 (1991-06-01), Nagao
patent: 5249639 (1993-10-01), Marr et al.
patent: 5267628 (1993-12-01), Tomiyoshi et al.
patent: 5287794 (1994-02-01), Andersson

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