Motor vehicles – Steering by driving – Auxiliary steering motor
Patent
1998-04-01
2000-03-21
Swann, J. J.
Motor vehicles
Steering by driving
Auxiliary steering motor
701 41, B62D 1102
Patent
active
060391324
ABSTRACT:
A tracked vehicle includes an engine driven variable displacement steering pump which drives hydraulic steering motor. The steering motor drives a differential drive mechanism which drives left and right track drive wheels. A steering control system senses the position of a non-spring centered steering wheel, vehicle speed, engine speed, steering motor speed, whether or not the transmission is in gear or in neutral, and whether the clutch is engaged or disengaged. In order to prevent a self-perpetuating turn situation, the control system gradually decreases the steering motor speed if the transmission is in neutral or the clutch is not engaged, and the steering motor speed divided by the vehicle speed is greater than a threshold, and the vehicle speed is less than a reference level.
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Bottorff Christopher D
Deere & Company
Swann J. J.
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