A DRIVE SYSTEM FOR A MOTOR VEHICLE HAVING DRIVEN FRONT AND REAR AXLES

摘要

The drive arrangement for vehicles with driven front and rear axles has in the drive train (2;2a) to the rear axle (4) a fluid friction coupling (9) in series with a disconnector coupling or a free wheel unit (7). This opens when the rotational speed of the front wheel falls below that of the rear wheel. A load switchable supplementary coupling (13) bridges the fluid friction coupling (9). It closes dependent on the fluid temperature in the fluid friction coupling (9) to avoid mixed friction in the fluid friction coupling during reverse travel.