1. Definition

A constant velocity joint is a system that transmits rotational motion from a driving shaft to a driven shaft without angular displacement, whatever the break angle between the two shafts and whatever the variation in the latter. In general, front-wheel drive systems are equipped (see Figures 1 and 2 ) with a transmission on either side of the differential axle, comprising a fixed (axially speaking) homokinetic joint on the wheel side, with a large angular range, and a sliding homokinetic joint on the axle side, allowing a limited break angle and translation.