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Hybrid is a pretty broad term, but the real engineering triumph from Toyota is what they term "hybrid synergy drive" sometimes called ecvt.

Much more elegant than incorporating an electric motor in parallels with a conventional drive train or using a bunch of clutches to engage and disengage drive components. It uses 2 motors and a single planetary gear set to manage power for the prius, highlander, sienna and rav4. I think bigger trucks and some lexus vehicle get a more conventional hybrid system with multi speed gearboxes.