Steering control system

Details Steering control system Steering control system

1987-05-22

1988-04-12

Pekar, John A.

Motor vehicles

Surface effect vehicles

Dynamic seal or fluid curtain

60405, 91 6, B62D 508

Patent

active

047368110

ABSTRACT:
The steering system of some lightweight vehicles are electronically controlled and have a manually operated mechanical control as a backup. Such manual backup control would not be adequate for large earthmoving, construction and industrial type vehicles. The subject steering system includes an electrically controlled circuit actuated by rotation of a steering wheel for controlling a main pilot operated steering valve as the primary steering control. A hydraulic control circuit is also actuated by rotation of the steering wheel for controlling the same steering valve as a backup control when the electrically controlled circuit is not active. The hydraulic steering circuit is disabled when the electrically controlled circuit is activated. By using the same steering valve as an integral part of both circuits, the complexity and cost of the overall steering control system is reduced.

REFERENCES:
patent: 4513835 (1985-04-01), Fudino et al.
patent: 4651841 (1987-03-01), Adams

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