Patent ID: 6776275
Filing Date: 2004-08-17
Classification: B60K

Abstract:
A drive system for an all-wheel driven motor vehicle having a first and a second driven axle (3, 9), which drive system produces the driving connection to the wheels of the second driven axle (9) and has a differential-speed-dependent clutch (6) for driving the second driven axle, and an at least partially lockable differential (8) between the wheels of the second driven axle (9), the differential-speed-dependent clutch (6) comprising a pump which, when a differential speed between the first and second driven axles (3, 9) occurs, produces a pressure which leads to the transmission of a torque to the second driven axle (9), wherein a connecting line (18; 38; 48; 58, 70) leads from the delivery side (11 or 12) of the pump (10; 67) to an actuating member (27; 31, 32) of the lockable differential (8), with the result that, when a differential speed occurs, the pressure produced by the pump (10; 67) makes it possible to at least partially lock the differential (8).