Welcome to Prius_Technical_Stuff [PTS], a forum for sharing technical information about the Toyota Prius. We crave substantiated facts, figures, and references, but will tolerate the occasional reasonable opinion. Please no ad hominem attacks, lest your posts be banished to cyberoblivion.

If you want to understand how the Power Split Device (Prius transmission, or ECVT) works, complete with animations, please go here: http://www.ecrostech.com/prius/original/PriusFrames.htm And check out the "Understanding the Prius - What's Going on as I drive" section.
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