CVT i.e., continuously variable transmission. The biggest difference between this and a regular automatic transmission is that it eliminates the need for complex and heavy variable transmission gear assembly, but with just two variable speed drive pulley.
1. The CVT advantages and disadvantages
improve fuel economy and dynamic performance of the vehicle, improving ride comfort and ease of manipulation of the occupant of the driver, so it is ideal for car transmission means stepless gearbox has its own car-like gear, parking position P, reverse position R, neutral N, D, etc. forward, but when the car is stationary automatic shift forward, there is no feeling of sudden jump.
2. The continuously variable transmission principle
CVT system mainly comprises a driving wheel set, driven wheel set, with a metal basic member and a hydraulic pump.
the metal strip is made of metal rings and two beams hundreds metal sheet.
group driving wheel and the driven wheel set by the movable and stationary discs, and the elements close to the cylinder side of the pulley the shaft can slide, the other side is fixed.
movable plate and the fixed plate are tapered structure, the tapered surface thereof to form a V-groove engaged with V-belt metal.
power of the engine output shaft is transmitted to the first output of the drive wheel of the CVT, and then transmitted through the V-belt to the driven wheels, the final reduction gear, a differential transmitted to the wheel to drive the car.
3. The continuously variable transmission and continuously variable transmission from the
The automatic transmission is easy to operate, and reduce driver fatigue born, according to the gear shift control system, which can be divided pilot hydraulic automatic transmissions and electronically controlled hydraulic automatic transmission; by way gear ratio changes can be divided into a stepped automatic transmission and a continuously variable automatic transmission.
Therefore, the continuously variable transmission is actually an automatic transmission, but it is more than common automatic transmission is much more complex, technically more advanced.
The continuously variable transmission and a common hydraulic automatic transmissions biggest difference is in the structure, which is composed of a gear shift hydraulic control system, there are gear,It can achieve a continuously variable transmission between two gears, and two continuously variable transmission is a belt and gear wheel composed of simpler structure than the conventional automatic transmission, smaller.
In addition, it can freely change the gear ratio to achieve full CVT, vehicle speed change is more stable, there is no tradition that the shift transmission “Dayton” feeling.