Electronic Q2

This is a system that reduces typical forward understeer, improves cornering and more generally provides a more enjoyable "devotee" driving experience.

The system should not be confused with the Q2 presented at the 2006 Bologna Motor Show in the Alfa 147 and GT vehicles. The latter actually consists of a mechanical limited slip differential of the TorSen type, which is very different from the system we find on the MiTo and on the MY08 159 family (Sportwagon, Brera, Spider) which: as the name suggests, is electronically controlled.

The Q2 and the new Electronic Q2 share features in common, which are mainly to limit the typical understeer of front-wheel drives, as we discussed above. In fact, a conventional type differential transmits the same amount of torque to the two drive wheels in all conditions, often insufficient to contain the lack of traction provided by the inner wheel “lightened” by lateral load transfer. ...

Q2, on the other hand, when the inner wheel begins to lose traction, transfers more torque to the outer, reducing the tendency to widen the nose and thus allowing higher cornering speeds. The improved dynamic performance of the Q2 transmission also delays the intervention of the vehicle's electronic control systems, enhancing driving pleasure.

Finally, the electronic Q2 acts on the braking system, which, properly controlled by the ESP control unit, creates road behavior very similar to that of a limited slip differential like the Torsen above. In particular, the control unit responsible for the front braking system, in the conditions of acceleration during cornering, accordingly acts on the inner rim, increasing the tractive force of the outer rim, which, being more "loaded", leads to behavior completely similar to that of the traditional Q2 ...