Motor vehicles – Having four wheels driven – With differential means for driving two wheel sets at...
Patent
1987-10-05
1989-07-18
Marmor, Charles A.
Motor vehicles
Having four wheels driven
With differential means for driving two wheel sets at...
180248, 180197, B60K 1734
Patent
active
048485080
ABSTRACT:
A center differential offering a full-time two axle dirve system. The center differential includes a planetary gear set defining a first drive path which provides an effective torque split ration to the front axle of the vehichle which is several percent less than the minimum dynamic weight ratio on the front axle assembly. The center differential further includes a bidirectional clutch mechanism defining a second drive path for connecting the driving input to the front drive axle assembly with a drive ratio several percent more than the rear axle ratio. The effective torque split and drive ratios are selected as a function of vehicle weight distributionand tire data for a specific vehicle so as to effect a controlled transfer of torque between the first and second drive paths and before the affected axle assembly reaches its traction limit in any mode of operation.
REFERENCES:
patent: 3481436 (1969-12-01), Wilkowski
patent: 3656573 (1972-04-01), Halberg
patent: 4434878 (1984-03-01), Okubo
Fogelberg Mark J.
Smirl Richard L.
Borg-Warner Automotive Inc.
Geppert James A.
Harbst John W.
Jennings James J.
Marmor Charles A.
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