Patent ID: 9664240
Date: 2017-05-30
CPC Classifications: B60K,F16D,Y10T

Claim:
1. A motor vehicle drive train arrangement with a main drive train ( 10 ) connected to a main drive axle ( 11 ) for driving the main drive axle ( 11 ), and at least one auxiliary drive train ( 12 ) with an auxiliary drive shaft ( 17 ) connected to the main drive train ( 10 ) to be driven thereby and to a secondary drive axle ( 13 ) for driving the secondary drive axle ( 13 ) via the at least one auxiliary drive train ( 12 ), the at least one auxiliary drive train ( 12 ) including first and second wheel drive shafts ( 15 , 16 ) which are connected to the auxiliary drive shaft ( 17 ) at a speed synchronized with the speed of the main drive axle ( 11 ), the secondary drive axle ( 13 ) being linked to the at least one auxiliary drive train ( 12 ) without an axle differential and the at least one auxiliary drive train ( 12 ) being linked to the main drive train ( 10 ) via a multi-disk clutch ( 29 ), and the first and second wheel drive shafts ( 15 , 16 ) being provided with first and second couplers ( 18 , 19 ) for selectively connecting at least one of the first and second wheel drive shafts ( 15 , 16 ) to the at least one auxiliary drive train ( 12 ) so as to provide for a quasi differential functionality, and a control and regulating unit ( 20 ) programmed so as to select one of a normal operating mode, a standby operating mode and an auxiliary operating mode, depending on operating conditions and always subject to a vehicle speed limit and permit selection of the standby operating mode or the auxiliary operating mode only below a defined speed limit and selection of the normal operating mode only above the defined speed limit.