A CVP (Continuously Variable Planetary) is a type of CVT (Continuously Variable Transmission) that also incorporates the functionality of a planetary or epicyclic gear set.
Here's a breakdown:
Understanding the Terms
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CVT (Continuously Variable Transmission): A CVT is a transmission that can change seamlessly through a continuous range of effective gear ratios. This contrasts with traditional transmissions that have a fixed number of gear ratios.
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CVP (Continuously Variable Planetary): A CVP is a more specific type of CVT. The key difference is that it also includes a planetary gear set (or epicyclic gear set). Planetary gear sets are used to provide different gear ratios and can offer advantages in terms of size, weight, and efficiency in certain applications.
Key Differences Summarized
| Feature | CVT | CVP |
|---|---|---|
| Definition | Transmission with continuous ratios | CVT with a planetary/epicyclic gear set. |
| Gear Ratio | Continuous | Continuous (achieved through the CVT aspect) |
| Planetary Gear Set | Not Included | Included - providing added functionality and gear ratio options. |
Example: NuVinci CVP
The NuVinci CVP, developed by Fallbrook, serves as a practical illustration of CVP technology. The name "NuVinci" itself is inspired by Leonardo da Vinci, who conceptualized a CVT-like mechanism in 1490, demonstrating the long-standing interest in this type of technology. The NuVinci CVP was introduced in December 2006 for use in bicycles in the Netherlands.
