Image: 4-Stroke-Engine

Description: Animated scheme of a four stroke internal combustion engine, Otto principle: Suction stroke - Air and vaporised fuel are drawn in. Compression stroke - Fuel vapor and air are compressed and ignited. Power stroke - Fuel combusts and piston is pushed downwards. Exhaust stroke - Exhaust is driven out.
Title: 4-Stroke-Engine
Credit: Own work
Author: UtzOnBike (3D-model & animation: Autodesk Inventor)
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Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC-BY-SA-3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0/
Attribution Required?: Yes