In a combustion engine, the combustion of the air/fuel mixture drives pistons. Via connecting rods, the movement of these pistons in a straight line is converted into the rotation of the crankshaft. The V-belt uses the force from the rotation (torque) of the crankshaft and drives additional units via V-ribbed belt pulleys. As such it is responsible for the correct operation of the engine and high levels of ride comfort. The V-ribbed belt has an advantage over the V-belt in that it is able to transmit the torque from the engine to several units at the same time.