Automatic rear wheel self-centering device for four-wheel steeri

Details Automatic rear wheel self-centering device for four-wheel steeri Automatic rear wheel self-centering device for four-wheel steeri

1995-11-28

1998-06-02

Johnson, Brian L.

Motor vehicles

Steering gear

With fluid power assist

180414, 180403, B62D 506

Patent

active

057587400

ABSTRACT:
An automatic rear wheel self-centering device for four-wheel steering vehicles automatically performs the rear wheel self-centering operation when the steering mode of the vehicle returns from another steering mode to the standard steering mode. The device has a branch conduit branched from a conduit leading from the steering unit to the steering mode selection valve. A conduit control valve is mounted to the branch conduit and is changeable between a neutral position blocking the branch conduit, a first position connecting the branch conduit to one side chamber of the rear wheel steering cylinder and a second position connecting the branch conduit to the other side chamber of the cylinder. The spool of the conduit control valve moves synchronous with a linear movement of the piston of the rear wheel steering cylinder, thereby changing the position of the conduit control valve between the above three positions.

REFERENCES:
patent: 3556243 (1971-01-01), Susag
patent: 4700960 (1987-10-01), Miki et al.
patent: 5062484 (1991-11-01), Okamoto et al.

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