Motor vehicles – Steering by driving – Combined with manual steering
Patent
1992-06-01
1994-02-01
Tyson, Karin L.
Motor vehicles
Steering by driving
Combined with manual steering
180132, 180 648, B62D 1104
Patent
active
052825167
ABSTRACT:
Steering systems are normally incorporated into hydrostatic drive systems for use on track-type vehicles. The currently available steering systems do not take advantage of the potential energy created by slowing down the inside track during a steering maneuver. The subject regenerative steering system includes positioning a pair of reversing valves between a source of pressurized fluid and a pair of motor/pump units drivingly connected to a pair of tracks. Each of the variable displacement motor/pump units includes a displacement controller for controlling the displacement of the motor/pump unit. To initiate a steering maneuver, a control signal is directed to the displacement controller of one of the motor/pump units to change the displacement of the motor/pump unit causing the track to slow down and start driving the motor/pump unit. The reversing valve disposed between the source of pressurized fluid and the one motor/pump unit is shifted from one discrete position to another discrete position so that the fluid pumped from the one motor/pump unit supplements the fluid flow to the other motor/pump unit in a regenerative manner. By converting the energy required to slow the one track into fluid power, the speed of the vehicle will not drop as drastically as it would without the regenerative type steering.
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Caterpillar Inc.
Grant John W.
Tyson Karin L.
Zeender Florian
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