The most common solution is to use a mechanical device to distribute torque to the wheels.
The differential distributes torque (angular force) evenly, while distributing angular velocity (turning speed) such that the average for the two output shafts is equal to that of the differential ring gear.
The first distributes torque to all four wheels as the MDX accelerates from a stop to cruising speed.
The ATTS was able to distribute torque across the front drive wheels in order to reduce understeer in cornering, and provide more neutral handling for the front-wheel driven car.
It works even on dry pavement to actively distribute driving torque to all four wheels as the vehicle accelerates from a stop to cruising speed.
The Torsen differential is a true 'intelligent' differential in the way it distributes torque.
The transfer case sits behind your vehicle's transmission and distributes torque to the axles through driveshafts.
Standard on all X6 models is BMW's Dynamic Performance Control, which works with the AWD system to distribute torque between the individual rear wheels.
A spherical differential connects the four rotating carriages, distributing torque between two wheels rotating at different speeds.
The Torsen-based quattro system also offers an advantage, in the opposite function of distributing torque to the road wheels, namely engine braking.