Motor vehicles – Having four wheels driven – Including pump and fluid motor – or generator and electric...
Patent
1980-12-10
1983-08-30
Peters, Jr., Joseph F.
Motor vehicles
Having four wheels driven
Including pump and fluid motor, or generator and electric...
60420, 60445, 60484, 91473, 180307, B60K 4100
Patent
active
044011822
ABSTRACT:
A vehicle propulsion system is provided with an auxiliary hydraulic drive having a variable displacement motor connected to ground engaging wheels by a clutch. A multiple position control has a first position which causes clutch engagement and positions a motor displacement member in a position which permits fluid drive of the motor. The control has a second position which causes clutch disengagement and positions the motor displacement member in a zero displacement condition which prevents fluid drive of the motor. Preferably the control is responsive to motor output speed and reduces motor displacement as speed increases.
REFERENCES:
patent: 3217826 (1965-11-01), Carter et al.
patent: 3458005 (1969-07-01), Malm et al.
patent: 3724583 (1973-04-01), Caldwell
patent: 3736732 (1973-06-01), Jennings et al.
patent: 4040254 (1977-08-01), Knapp et al.
patent: 4080850 (1978-03-01), Bubula et al.
patent: 4241577 (1980-12-01), Baldauf
patent: 4306467 (1981-12-01), Pollman
Hill Mitchell J.
Killingsworth Ted E.
McMurry Michael B.
Peters Jr. Joseph F.
Sundstrand Corporation
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