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2-stroke diesel is the (near) future?



 
 
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  #121  
Old July 13th 05, 02:19 PM
Sport Pilot
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Thinking a very large version of that was used before?

  #122  
Old July 17th 05, 05:48 PM
Don Stauffer
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mastic wrote:
"Sport Pilot" wrote:


Here is an animated link showing the differances of the Otto and Diesel
cycles.

http://www.ulb.ac.be/sma/testcenter/...osedcycle.html

Notice the near instant burning in the example gives very nearly a
constant volume, in actual practice some compression is going on at
this time.

Also during a Diesel cycle it is hard to maintain a constant pressure,
it would actually drop off, especially near the end of the down stroke.



But both are still otto cycles.
If you think the fuel burns instantly in a spark engine remove the
exhaust manifold and run the engine, observe the flame exiting the
exhaust port.


Indeed, if it does burn "instantly", that is detonation. However, it
burns more rapidly in a SI engine than in a true Diesel cycle Diesel. In
fact, it is astonishing to me how fast one can turn even relatively
large SI engines, such as Formula 1 car engines. Is there no limit :-)
  #123  
Old July 17th 05, 05:50 PM
Don Stauffer
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mastic wrote:

Otto cycle = four stroke, nothing to do with fuel injection, burn
rates, phases of the moon or the flavor of ice cream.
See
http://en.wikipedia.org/wiki/Otto_cycle


I thought the Otto cycle was supposed to have the power stroke be
ideally completely adiabatic.
  #124  
Old July 18th 05, 12:39 AM
~^Johnny^~
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Sun, 17 Jul 2005 11:48:43 -0500, Don Stauffer
wrote:

it is astonishing to me how fast one can turn even relatively
large SI engines, such as Formula 1 car engines. Is there no limit
:-)


http://www.petting-zoo.net/~deadbeef/archive/5304.html


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Version: PGP 7.1

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=cDhj
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--
-john
wide-open at throttle dot info
 




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