Tuesday Torque: Atkinson Cycle

We saw an Atkinson Cycle engine on display at the Henry Ford Museum many years ago, and I think we have seen a model running at an engine show.  Here is a video that shows how it works.  The piston makes four strokes for each revolution of the flywheel.  The Atkinson Cycle is used in the Honda hybrid cars, and this type of engine is weak on torque at low speed, but very efficient when running at operating speed.


Here's one running...