Motor vehicles – Steering by driving – Auxiliary steering motor
Patent
1997-05-22
1999-07-13
Hurley, Kevin
Motor vehicles
Steering by driving
Auxiliary steering motor
701 41, B62D 1104
Patent
active
059213353
ABSTRACT:
A steering control system for a tracked vehicle includes a spring centered steering wheel which is rotatable in both directions to endstops. A steering control unit executes a transitional counter-rotation (TCR) mode algorithm which disables steering or counter-rotation when the gear lever moves from park to neutral or from park to neutral to gear while the clutch is disengaged. Steering function can be re-enabled by turning the steering wheel to its centered position and then turning the steering wheel in either direction away from its centered position, or by turning steering wheel towards one of its endstop positions (without centering the steering wheel). If steering or counter-rotating is enabled the second way, then during a transition period the turning rate as a function of the position of the steering wheel will be less than that of normal operation. If the steering wheel is then held at the endstop position, the control system will automatically and gradually increase the rate of turning (by increasing an electronic steering gain value) until full normal turning rate capability is attained.
REFERENCES:
patent: 4309917 (1982-01-01), Leet
patent: 4699021 (1987-10-01), Waddington
patent: 5485376 (1996-01-01), Oike et al.
patent: 5529134 (1996-06-01), Yomogita
Deere & Company
Hurley Kevin
LandOfFree
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