Motor vehicles – Steering gear – With fluid power assist
Patent
1999-02-02
2000-04-04
Tudor, Harold J.
Motor vehicles
Steering gear
With fluid power assist
B62D 506
Patent
active
H00018465
ABSTRACT:
The present invention provides an electro-hydraulic steering system for an articulated vehicle having a front frame and a rear frame. The system includes a controller and a hydraulic steering system having a pump for providing hydraulic pressure. A steering input control, typically a steering wheel, transmits mechanical steering inputs to the hydraulic steering system. A pair of articulation cylinders rotate the front frame with respect to the rear frame in response to hydraulic pressure to steer the vehicle. Position sensors transmit input signals to the controller indicating the position of the steering input control and each of the articulation cylinders. An electro-hydraulic valve receives electrical control signals from the controller to control the hydraulic pressure to each articulation cylinder. In this manner, the present invention can perform steering performance enhancements, such as snubbing, steering jerk limit control, and electronic steering adjustment.
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Caterpillar Inc.
Kercher Kevin M.
Tudor Harold J.
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