Continuously Variable Transmission (CVT)

This type of transmission is similar to an automatic transmission in that there is no clutch to depress. However, unlike a conventional automatic, there are no gears to be changed. A CVT consists of an expandable steel belt or chain strung between two cone-shaped pulleys; one connected to the engine, the other to the driven wheels.

The cones vary in diameter depending on how quickly the driver wants to accelerate, continuously varying the gear ratios. Vehicles with continuously variable transmission have improved power application and fuel economy compared to regular automatics and emit less carbon dioxide.