What is the output driving ratio of a continuously variable transmission?

What is the output driving ratio of a continuously variable transmission?

• A. Infinite
• B. Fixed ratio
• C. Zero
• D. Limited to predefined steps

Answer: (A)

A continuously variable transmission provides a ratio that can be changed smoothly across a range, not in fixed steps. This is achieved by adjusting the effective diameters of the input and output pulleys with a belt or chain, so the gear ratio can be tuned continuously as needed. However, this ratio is bounded by the hardware—the pulleys’ sizes and belt length—so you can’t reach infinite or zero or wander beyond finite limits. The key idea is that CVTs offer a continuous range of gear ratios within those finite limits, enabling smooth engine efficiency without discrete shifts.

A continuously variable transmission provides a ratio that can be changed smoothly across a range, not in fixed steps. This is achieved by adjusting the effective diameters of the input and output pulleys with a belt or chain, so the gear ratio can be tuned continuously as needed. However, this ratio is bounded by the hardware—the pulleys’ sizes and belt length—so you can’t reach infinite or zero or wander beyond finite limits. The key idea is that CVTs offer a continuous range of gear ratios within those finite limits, enabling smooth engine efficiency without discrete shifts.