Bild:4-Stroke-Engine.gif
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4-Stroke-Engine.gif (404 kB, MIME-Typ: image/gif)
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Animated scheme of a four stroke internal combustion engine, Otto principle.
[edit] Detailed Description
- Fuel and oxygen are injected
- Fuel and oxygen are compressed and ignited
- Fuel combusts and piston is pushed downwards
- Exhaust is removed
"' when engine revs smoke comes out of the exhuast
[edit] Warnings & Comments
'Warning': This animation is not completely accurate. There should be some space left when the piston is at its highest position. The current animation suggests infinite compression.'
Comment: This is a 2D projection of a 3D model. The little space went lost in the pixels of the outlines. And a 2D projection is not able to show the space around the "roof" of the piston. (UtzOnBike) --85.182.123.226 20:58, 11 October 2006 (UTC)
Also, the valve dimensions are not to the usual scale. The exhaust valve should be the larger of the two to facilitate removal of the increased volume of gas that expanded during the combustion process.
The exhaust valve is never larger than the intake valve unless it is a three valve configuration. In the case of a three valve engine there would be two intake valves and one exhaust valve.
The intake valves need to be larger than the exhaust valves, because the intake, in most cases, relies on atmospheric pressure to force fuel mixture into the cylinder. The exhaust can be released from the cylinder at very high pressure. (big fool, dec 2006)
[edit] Origin
Source: self-made: UtzOnBike (3D-model & animation: Autodesk Inventor)
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".
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