AUSLEGUNG AND KONZEPTION DES ALLRADANTRIEBS IM AUDI 80 QUATTRO.

In the development of a new four-wheel drive passenger car the question arises whether the drive concept chosen in the preceding model has proved efficient, and whether there is a potential for improvement through new development work on power train components. With a tractive force distribution diagram it is shown that the 50:50% distribution of the driving torque employed in the Audi cars guaranties a high acceleration performance and safe handling behavior at the same time. A further possiblity for improvement of this driving concept results by using a Torsen differential as the center differential, which matches the driving torques to the friction coefficients at the front and rear. This does not impair the function of the brakes, both with and without ABS, and operates automatically. With the Torsen differential the accelerating performance is improved to the theoretical maximum and at the same time the influence of the driving forces on handling behavior is reduced further.