Motor vehicle comprising two driven axles

Details Motor vehicle comprising two driven axles Motor vehicle comprising two driven axles

1989-11-13

1991-04-30

Marmor, Charles A.

Motor vehicles

Having four wheels driven

With differential means for driving two wheel sets at...

180249, B60K 1735

Patent

active

050109758

ABSTRACT:
A motor vehicle comprises two driven axles, one of which is adapted to be driven by a drive train, which comprises a liquid friction coupling, which is preceded in said drive train by a clutch, which is adapted in a first position to cause the rear axle to be driven via said liquid friction coupling, in a second position to by-pass said liquid friction coupling and in a third position to disconnect said rear axle from said drive train. In a motor vehicle comprising a transmission comprising at least one cross-country or crawling gear the clutch is adapted to assume said second position under the control of a pick-up, which is associated with the cross-country gear or gears, a switching and control stage, and an actuator in response to the selection of the cross-country gear or one of the cross-country gears. That actuation is independent of the position previously assumed by the clutch. The clutch will remain in that position until a road gear is selected in the transmission. That arrangement will ensure that proper conditions for the drive of the axle which is driven via the coupling unit consisting of the liquid friction coupling and the clutch will be obtained during the cross-country travel regardless of the experience and skill of the driver.

REFERENCES:
patent: 4592442 (1986-06-01), Wilson
patent: 4723624 (1988-02-01), Kawasaki et al.
patent: 4854413 (1989-08-01), Kameda et al.

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