Vehicle steering arrangement and method

Details Vehicle steering arrangement and method Vehicle steering arrangement and method

2011-08-16

2011-08-16

Winner, Tony H. (Department: 3611)

Motor vehicles

Steering by driving

Independently operable drive motors

C180S006600, C180S006620, C180S307000

Reexamination Certificate

active

07997360

ABSTRACT:
Vehicles with open loop hydraulic steering systems may suffer from jerky steering due to the necessity to have safety valves in the open loop system to prevent uncontrolled vehicle movement. Traditional open loop steering arrangements allow steering by controlling fluid quantities flowing from the pump to the drive motors. The disclosed vehicle has an open loop hydraulic drive system including first and second variable displacement motors for driving ground engaging mechanisms at first and second sides of the vehicle, respectively. The system includes a control mechanism configured for steering the vehicle by changing the displacement of one of the first and second motors. This allows the operator to change the drive motor speed range during travel.

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