Tracked vehicle steering control system with steering pump...

Details Tracked vehicle steering control system with steering pump... Tracked vehicle steering control system with steering pump...

B - Operations, Transporting

62

D

B62D 11/02 (2006.01) B62D 11/18 (2006.01)

Patent

CA 2335215

A tracked vehicle has an electrohydraulic drive/steering system having an engine driven variable displacement hydraulic steering pump which drives a hydraulic steering motor which is coupled to a differential track drive mechanism via a transmission with multiple gear ratios. A steering wheel is coupled to a variable friction device which produces a variable friction force which resists rotation of the steering wheel. A control system is responsive to a position of the steering wheel and controls the steering pump displacement and controls the friction device. The control system sets the variable friction device to its high friction level when a limit of the steering pump displacement is reached when the transmission is in a higher one of its gear ratios.

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