variaator

The term "variaator" refers to a type of continuously variable transmission (CVT) commonly found in automatic scooters and some motorcycles. It is a mechanical system that allows for a smooth and stepless change in gear ratio. Instead of distinct gears like a traditional transmission, a variaator uses two pulleys that move relative to each other, connected by a belt or chain. One pulley is connected to the engine's crankshaft, and the other is connected to the drive wheel.

As the engine speed increases, the V-belt or chain rides higher on the driving pulley, forcing it wider. Simultaneously, the driven pulley narrows, causing the belt to ride lower, effectively increasing the gear ratio. This process happens continuously, allowing the engine to operate within its optimal power band for a given speed. This results in smoother acceleration and improved fuel efficiency compared to transmissions with fixed gear ratios. The variaator system is also known for its simplicity and compact design. Some variaators incorporate a centrifugal clutch, which automatically disengages the transmission when the engine is at idle.