An excelent animation of an
internal combustion engine, which I discovered accidentally while working on improving a different page. I think this is simply awesome. This originated on the commons.
Sure thing. 1) Gasoline enters the cylinder through the valve on the right. This valve is then closed. 2) The gas is compressed until it combusts. 3) The explosion from the gas pushes the cylinder down. 4) The left valve opens, allowing the exhaust gases to escape. This valve closes, and the cycle repeats.
TomStar8105:51, 11 February 2006 (UTC)reply
As this is a petrol engine, the description should be: 2) The gas is compressed until the spark plug causes it to combust. Or words to that effect. |
Spaully
Support -- This is a superb animation, as good as any on wikipedia in my opinion. As mentioned by
JPM it needs a thorough explanation though. In addition to the information put forth by
TomStar81 something needs to be said about how the valves are actuated by the cams. The explanation would be excessive for what could fit into the caption and a section of the article needs to be created to explain this animation.
Meniscus06:57, 11 February 2006 (UTC)reply
Support. Very good image, but should be inserted in articles with an explanation, similar to Toms. |
Spaully
Support. Very good animation. It would be nice, if it ran a little slower. That would make it easier to grasp what is happening in which cycle. As well as a better visualization of the flow direction of the gas. If a vector-based model existed, an animation using SVG might be created from it (just an idea).
Mikeo12:24, 11 February 2006 (UTC)reply
Oppose - I would much prefer it if the petrol flow went from left to right. And I've seen better animations of the same process elsewhere. The image aliasing as mentioned below is also pretty poor. -
Hahnchen15:32, 11 February 2006 (UTC)reply
Oppose. It's not bad, and illustrations like these do improve understanding. However, I find the lack of arrows indicating flow direction troublesome, as with the speed.
enochlau (
talk)
15:52, 11 February 2006 (UTC)reply
Support. First, it looks cool. Second, it clearly illustrates what is going on in a combustion engine. Featured picture? Why not? -
Alanmak22:17, 11 February 2006 (UTC)reply
Support. The animation really makes it clear. I like the classic Miller DOHC configuration and finned sump. It can represent either a four valve or a two valve. Color shows pressure as well as temperature. The counterweight's function is made obvious. On the other hand, the compression ratio appears unreasonably high.
David R. Ingham07:15, 12 February 2006 (UTC)reply
Oppose. As David pointed out there should always be a little space left above the piston, also the existing FP is part of a series which shows the process less cluttered and with clearer illustrations. --
Dschwen17:23, 12 February 2006 (UTC)reply
Changing vote to oppose because as Janke notes, the piston does seem to show an unbelieveably high ratio of compression and that is scientifically inaccurate and misleading.--
Deglr632821:24, 18 February 2006 (UTC)reply
Oppose. Good animation. But: needs anti-aliasing, color bands inside the cylinder are distracting and for some reason the piston flashes in stroke 2 and 4. WP 09:17, 18 February 2006 (UTC)
Oppose - I never thought I might oppose an animation this good (I can live with the aliasing), but the technical inaccuracy (infinite compression!!!) compels me to. --
Janke |
Talk09:28, 18 February 2006 (UTC)reply
Support Beautifully executed. I do not think that SVG or Flash would be better. SVG isn't widely supported enough, and Flash is a potential vector for viruses (which means that people using secure systems often have Flash disabled or not even installed).
Agateller13:04, 20 February 2006 (UTC)reply
Promoted Image:4-Stroke-Engine.gif: there are exactly twice as many supporters as opposers, which is what I tend to use as my guideline. This was a very close result.
Raven4x4x07:53, 25 February 2006 (UTC)reply
Comment: Hi - I am UtzOnBike, the creator of this animation. Thanks to all supporters. But here some explanations: 1. This animation was done for the german wikipedia, where it is part of an explanation in text. 2. Of course, some arrows would help - but I do not like arrows in my animations. 3. This animation was done with Autodesk Inventor, a CAD programm. So it is all 3D, but the graphic is not optimized for animations (-> alising). 3. The compression is definitely not infinite! But in pixels, it looks like. 4. The spark itselfes is blue - but looks different (a thin line). 5. There are pistons in a lot of shapes. Some are flat on top, some are roof-shaped (as shown here), some have other shapes. It depends on valve angle, compression, position of spark plug, ... Thanks to all! UtzOnBike (--
85.183.209.1920:34, 11 October 2006 (UTC))reply
An excelent animation of an
internal combustion engine, which I discovered accidentally while working on improving a different page. I think this is simply awesome. This originated on the commons.
Sure thing. 1) Gasoline enters the cylinder through the valve on the right. This valve is then closed. 2) The gas is compressed until it combusts. 3) The explosion from the gas pushes the cylinder down. 4) The left valve opens, allowing the exhaust gases to escape. This valve closes, and the cycle repeats.
TomStar8105:51, 11 February 2006 (UTC)reply
As this is a petrol engine, the description should be: 2) The gas is compressed until the spark plug causes it to combust. Or words to that effect. |
Spaully
Support -- This is a superb animation, as good as any on wikipedia in my opinion. As mentioned by
JPM it needs a thorough explanation though. In addition to the information put forth by
TomStar81 something needs to be said about how the valves are actuated by the cams. The explanation would be excessive for what could fit into the caption and a section of the article needs to be created to explain this animation.
Meniscus06:57, 11 February 2006 (UTC)reply
Support. Very good image, but should be inserted in articles with an explanation, similar to Toms. |
Spaully
Support. Very good animation. It would be nice, if it ran a little slower. That would make it easier to grasp what is happening in which cycle. As well as a better visualization of the flow direction of the gas. If a vector-based model existed, an animation using SVG might be created from it (just an idea).
Mikeo12:24, 11 February 2006 (UTC)reply
Oppose - I would much prefer it if the petrol flow went from left to right. And I've seen better animations of the same process elsewhere. The image aliasing as mentioned below is also pretty poor. -
Hahnchen15:32, 11 February 2006 (UTC)reply
Oppose. It's not bad, and illustrations like these do improve understanding. However, I find the lack of arrows indicating flow direction troublesome, as with the speed.
enochlau (
talk)
15:52, 11 February 2006 (UTC)reply
Support. First, it looks cool. Second, it clearly illustrates what is going on in a combustion engine. Featured picture? Why not? -
Alanmak22:17, 11 February 2006 (UTC)reply
Support. The animation really makes it clear. I like the classic Miller DOHC configuration and finned sump. It can represent either a four valve or a two valve. Color shows pressure as well as temperature. The counterweight's function is made obvious. On the other hand, the compression ratio appears unreasonably high.
David R. Ingham07:15, 12 February 2006 (UTC)reply
Oppose. As David pointed out there should always be a little space left above the piston, also the existing FP is part of a series which shows the process less cluttered and with clearer illustrations. --
Dschwen17:23, 12 February 2006 (UTC)reply
Changing vote to oppose because as Janke notes, the piston does seem to show an unbelieveably high ratio of compression and that is scientifically inaccurate and misleading.--
Deglr632821:24, 18 February 2006 (UTC)reply
Oppose. Good animation. But: needs anti-aliasing, color bands inside the cylinder are distracting and for some reason the piston flashes in stroke 2 and 4. WP 09:17, 18 February 2006 (UTC)
Oppose - I never thought I might oppose an animation this good (I can live with the aliasing), but the technical inaccuracy (infinite compression!!!) compels me to. --
Janke |
Talk09:28, 18 February 2006 (UTC)reply
Support Beautifully executed. I do not think that SVG or Flash would be better. SVG isn't widely supported enough, and Flash is a potential vector for viruses (which means that people using secure systems often have Flash disabled or not even installed).
Agateller13:04, 20 February 2006 (UTC)reply
Promoted Image:4-Stroke-Engine.gif: there are exactly twice as many supporters as opposers, which is what I tend to use as my guideline. This was a very close result.
Raven4x4x07:53, 25 February 2006 (UTC)reply
Comment: Hi - I am UtzOnBike, the creator of this animation. Thanks to all supporters. But here some explanations: 1. This animation was done for the german wikipedia, where it is part of an explanation in text. 2. Of course, some arrows would help - but I do not like arrows in my animations. 3. This animation was done with Autodesk Inventor, a CAD programm. So it is all 3D, but the graphic is not optimized for animations (-> alising). 3. The compression is definitely not infinite! But in pixels, it looks like. 4. The spark itselfes is blue - but looks different (a thin line). 5. There are pistons in a lot of shapes. Some are flat on top, some are roof-shaped (as shown here), some have other shapes. It depends on valve angle, compression, position of spark plug, ... Thanks to all! UtzOnBike (--
85.183.209.1920:34, 11 October 2006 (UTC))reply