CONSTANTLY VARIABLE TRANSMISSION (CVT)

Automatic transmission is generally used in a scooter type motorcycle (scooter). Used transmission automatic transmissions "V" belt or known as CVT (Constantly Variable Transmission). CVT is an automatic transmission that uses belts to get the ratio varies.

Picture 1. Construction CVT type automatic transmission

As shown in the picture above consists of the CVT transmission; mace two connected by a belt (belt), a clutch centrifugal (6) to connect to a rear-wheel drive when the gas throttle in the open, and a transmission gear to reduce speed (reduce) rounds. Pulley activator / pulley centrifugal drive unit (1) tied to the end of the crankshaft; act as a speed control based on centrifugal style. Driven pulley (5) rotates in main bearings (input shaft) transmission. The center of the clutch centrifugal (6) attached / paired with the mace (5) and go round with the mace. Drum clutch (7) are on the main axis of flow (input shaft) and will rotate the shaft when a force from the clutch.
Both mace each separated into two parts, with half the parts are made permanent and the other half can be moved closer or away from the direction of the axis. At the time the machine is not spinning, crack activator mace (1) is at maximum position and the gap driven mace (5) is at minimum position. In Figure 2. below can be seen that movement mace (2) controlled by a roller movement (number 7 in figure 2. The function is similar to roller pressure on the clutch plate centrifugal. When the engine rev up, the roller will
thrown to the outside and encourage the shift biased mace a silent approach, so the gap will be narrowed Pulley.

Picture 2. Position and how to work mace

1. Crankshaft Edge
2. Pulley movers
3. Part mace could drive shifts
4. Belt (belt)
5. Pulley is mobilized
6. Rear axle
7. Roller
When the gap approached mace, it will push the belt in the direction
out. This will make mace (2) it rotates with a larger diameter. After the belt can not be stretched again, then the belt will continue the rotation of the mace (2) to pulley driven (5). If the force of the mace (2) push outward belt is greater than the spring pressure holding the mace which
driven (5), the mace (5) will be depressed against the spring, so the belt will rotate with a smaller diameter. Motorcycle speed is the same now as in high gear for manual transmission (see illustration image section C 7:18). If the engine speed decreases, mace drive roller (7) will shift down again and cause the mace could drive shift apart.
Simultaneously the spring pressure on the mace (5) promoting the mace that bias is shifted from the mace, so the belt rotates with a larger diameter at the rear and part of smaller diameter at the front part of. Motorcycle speed is the same now as in low gear for manual transmission