Transcript for:
Understanding Continuously Variable Transmission (CVT)

Variator or continuously variable transmission. The variator is designed to smoothly change the gear ratio. Movable cheek, front pulley. Rear pulley movable cheek. It is constantly supported by a spring. Movable cheeks constantly press on the belt. The belt has a V-shaped profile. The sides of the belt are a working surface. The higher the crankshaft speed, the stronger the variator rollers act on the movable cheek. The lighter the rollers, the higher the speed will be required to reach the maximum belt diameter. Centrifugal force moves the rollers away from the center of the pulley axis. The rollers rest on a stationary plate and move the movable pulley cheek. Both cheeks converge towards each other. The belt is pushed out onto the increased radius of the front pulley. The front pulley pulls the belt towards itself. The cheeks of the rear pulley diverge. The belt on the rear pulley moves to a small radius. This reduces the gear ratio from the front pulley to the rear. When the engine speed decreases, the centrifugal force acting on the variator rollers decreases. The rear pulley spring drives the belt on the rear pulley to an increased radius. The softer the spring, the lower the crankshaft rotation speed is needed to return the rollers to their original position. The movable cheek of the front pulley returns. The belt reaches its minimum radius. Thus, the gear ratio of the variator increases. Centrifugal clutch. With increasing speed, the rear pulley of the variator - the clutch pads diverge from the axis of rotation. the clutch pads diverge from the axis of rotation. Speed reducer input shaft and clutch housing. The pads move apart and rest against the clutch housing. This is how the torque is transmitted from the variator to the gearbox. 😉Thank you for watching. 👍👎Rate the video. 🖐Until next video.