As of my knowledge cutoff in September 2021, most CVT (Continuously Variable Transmission) systems do rely on a belt as a primary means of power transfer. However, it’s worth noting that technology is continually evolving, and there may have been advancements or developments since then.
While it is true that alternative technologies to belts have been explored for CVT systems, such as chain-driven CVTs or toroidal CVTs, the belt-driven CVT remains the most prevalent and widely adopted design in the automotive industry.
Belt-driven CVTs have been refined over the years to offer improved efficiency, durability, and performance. They have become the standard choice due to their smooth operation, cost-effectiveness, and reliability. The belts used in modern CVTs are typically made of special materials and have specific designs to enhance their grip, durability, and power transfer capabilities.
It’s important to keep in mind that advancements in transmission technology continue to occur, and there might be variations or innovations in CVT designs that have emerged since my knowledge cutoff. Therefore, it is recommended to consult the latest information from automotive manufacturers or experts to get the most up-to-date details on the specific technologies employed in the newest CVT transmissions.