Planetary four wheel drive system having plural modes of operati

Details Planetary four wheel drive system having plural modes of operati Planetary four wheel drive system having plural modes of operati

1974-10-17

1976-06-15

Wood, Jr., M. H.

Motor vehicles

Steam traction engines

Spring mounted on axle

180 2409, 180 49, 747105, B60K 1730

Patent

active

039630854

ABSTRACT:
A drive train for coupling the engine to the wheels of a vehicle has a compact combination of planetary gearing, transfer gearing and fluid pressure controlled clutches and brakes which may be conditioned to realize any of a plurality of operational modes to accommodate to different driving conditions. The available operational modes include ordinary two wheel drive, two wheel overdrive, a conventional four wheel drive action wherein power tends to be equally divided between front and rear axles, and an alternate four wheel drive mode wherein a predetermined division of torque is established between the front and rear axles together with a differential action therebetween. In a preferred form, the drive system may also be conditioned for parking by locking front and rear axles against rotation.

REFERENCES:
patent: 2228581 (1941-01-01), Olen
patent: 2574986 (1951-11-01), Schou
patent: 2853890 (1958-09-01), Kelbel
patent: 2936036 (1960-05-01), Norelius
patent: 3095758 (1963-07-01), Bixby
patent: 3126765 (1964-03-01), Conkle
patent: 3378093 (1968-04-01), Hill
patent: 3656573 (1972-04-01), Halberg
patent: 3788166 (1974-01-01), Hart
patent: 3828877 (1974-08-01), Fogelberg
patent: 3831695 (1974-08-01), Osterloff

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