Device for controlling the steering of a commercial vehicle,...

Details Device for controlling the steering of a commercial vehicle,... Device for controlling the steering of a commercial vehicle,...

2005-06-14

2011-11-22

Boehler, Anne Marie M (Department: 3611)

Motor vehicles

Steering gear

Each wheel steerable

C180S415000, C180S434000

Reexamination Certificate

active

08061469

ABSTRACT:
The disclosed device controls the steering of a commercial vehicle and comprises front wheels that can be oriented according to a first turning angle by a first actuator, rear wheels oriented according to a second turning angle by a second actuator, and a power circuit with a pressurized fluid source and power components that transmit hydraulic power to the actuators. The power components are controllable to configure the power circuit according to coupling modes between the front and rear wheels. The device includes a control circuit containing a power source and control components that are electrically controlled by an electrical control unit and transmit hydraulic commands relating to one of the determined coupling modes to the power components. The control components are hydraulically connected such that in the event of a fault in the electrical control, the commands permanently maintain the power circuit in the current coupling mode.

REFERENCES:
patent: 4917204 (1990-04-01), Andrew et al.
patent: 5139105 (1992-08-01), Frost et al.
patent: 5195603 (1993-03-01), Sugiyama et al.
patent: 5417299 (1995-05-01), Pillar et al.
patent: 5526891 (1996-06-01), Goloff
patent: 5609221 (1997-03-01), Endsley et al.
patent: 4423585 (1995-01-01), None
patent: 55004226 (1980-01-01), None

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