US 7,553,250 B2
Drive train of an all-wheel drive vehicle
Helmuth Sachsenmaier, Graz (Austria)
Assigned to Magna Drivetrain AG & Co KG, Lannach (Austria)
Appl. No. 10/590,230
PCT Filed Feb. 22, 2005, PCT No. PCT/AT2005/000057
§ 371(c)(1), (2), (4) Date Oct. 31, 2006,
PCT Pub. No. WO2005/080116, PCT Pub. Date Sep. 01, 2005.
Claims priority of application No. GM128/2004 (AT), filed on Feb. 23, 2004.
Prior Publication US 2007/0213165 A1, Sep. 13, 2007
Int. Cl. F16H 37/08 (2006.01)
U.S. Cl. 475—199  [475/198; 475/223; 180/233; 180/248] 17 Claims
OG exemplary drawing
 
1. A drive train of an all-wheel drive vehicle, comprising:
a driven front axle and a driven rear axle;
a front drive shaft leading to the front axle;
a rear drive shaft leading to the rear axle;
a transfer case adapted to be coupled to an engine transmission block and including a drive through shaft having a first end adapted to be drivingly connected to the engine transmission block and a second end fixed for rotation with the rear drive shaft;
a first friction coupling selectively drivingly interconnecting the drive through shaft and the front drive shaft;
a second friction coupling provided at the rear axle to selectively drivingly interconnect and disconnect the drive through shaft and a rotatable input to the rear axle; and
a control device to regulate the magnitude of torque transferred by the first and second friction couplings.