A CVT is a transmission that can shift steplessly and continuously through an infinite number of effective gear ratios. This stepless, continuous shifting ability improves fuel economy by allowing energy from the engine to be transferred at a high level of efficiency.

♦CVT components

♦CVT mechanism

While an AT functions by selecting from among several discrete gear combinations, a CVT uses pulleys and a belt. The diameter of each pulley is varied by changing its groove width, allowing the smooth and continuous selection of an infinite number of effective gear ratios.