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gone-ot · 03-28-2014, 11:54 PM

To be HONEST, I was (previously) NOT a CVT fan, however, since getting our '14 Prius with eCVT, I've sudden had to learn MORE about them, and, in-the-process, have become to believe they're definitely OK...especially, the eCVT, in this Prius.

Instead of the normally thought-of dual "cones & belts" CVT, the eCVT is actually a planetary (ring, idler, and sun) gear arrangement, so the gear 'teeth' are ALWAYS engaged...so, unlike the "cones & belts" system, physical "slippage" is totally NOT possible, unless something is broken.

The PriusChat (PC) forum has a neat animated illustration of *how* the eCVT works:

• PC thread: http://priuschat.com/threads/toyota-...ission.127864/

• animation: http://eahart.com/prius/psd/

• CVT history: http://groups.engin.umd.umich.edu/vi...Miller_W04.pdf

03-28-2014, 11:54 PM	#10 (permalink)
gone-ot ...beats walking... Join Date: Jul 2009 Location: . Posts: 6,190 Thanks: 179 Thanked 1,525 Times in 1,126 Posts	To be HONEST, I was (previously) NOT a CVT fan, however, since getting our '14 Prius with eCVT, I've sudden had to learn MORE about them, and, in-the-process, have become to believe they're definitely OK...especially, the eCVT, in this Prius. Instead of the normally thought-of dual "cones & belts" CVT, the eCVT is actually a planetary (ring, idler, and sun) gear arrangement, so the gear 'teeth' are ALWAYS engaged...so, unlike the "cones & belts" system, physical "slippage" is totally NOT possible, unless something is broken. The PriusChat (PC) forum has a neat animated illustration of how the eCVT works: • PC thread: http://priuschat.com/threads/toyota-...ission.127864/ • animation: http://eahart.com/prius/psd/ • CVT history: http://groups.engin.umd.umich.edu/vi...Miller_W04.pdf Last edited by gone-ot; 03-29-2014 at 01:32 AM..