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NW Washington | Basically, a CVT uses a hydrostat system to control the output speed of a planetary gearset. The hydraulic motor controls the speed of the planetary gearset's ring gear, which in turn controls the output of the gearset.
New CVT transmissions will use an electric motor to control the output speed, which should make them simpler and more reliable.
There is usually a range gearset to make it easier to obtain the speed desired with the least amount of work by the planetary gearset control system.
The trick is the system that makes the transmission perform without much input from the driver and optimizes engine power and fuel consumption. This is the complicated part.
A Google search will gather lots of information, including videos. https://www.fwi.co.uk/machinery/tractors/understanding-cvt-and-power...
https://www.youtube.com/watch?v=xhmN_CwB9B8&ab_channel=CaseIHNorthAm...
Edited by JohnW 3/6/2025 01:17
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How does a CVT transmission work
