Steering control arrangement

Details Steering control arrangement Steering control arrangement

1992-07-24

1993-10-05

Hill, Mitchell J.

Motor vehicles

Surface effect vehicles

Dynamic seal or fluid curtain

60405, B62D 530, F16B 909

Patent

active

052496392

ABSTRACT:
Vehicles having front and rear pairs of steerable wheels are sometimes provided with large springs for moving one pair of the wheels to a straight-ahead position during emergency steering. Large amounts of hydraulic energy are expended solely for the compression of such springs every time the pair of wheels are steered. A back-up steering control system (19) of the present steering control arrangement (10) has a servo valve (76) operative to control the flow of pressurized fluid from a back-up pump (60) to a steering control valve (21) which in turn controls the flow of pressurized fluid from the back-up pump to a hydraulic actuator (13) to hydraulically move a first pair of steerable wheels (11) to a straight-ahead position during emergency steering conditions. A manual control valve (68) is operative to control the flow of pressurized fluid from the back-up pump (60) to another steering control valve (22) which in turn controls the flow of pressurized fluid to a hydraulic actuator (16) for effecting steering of a second pair of steerable wheels (12) during the emergency steering condition.

REFERENCES:
patent: 4131177 (1978-12-01), Goodbary
patent: 4736811 (1988-04-01), Marsden
patent: 4770264 (1988-09-01), Wright et al.

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