Re: Carnot cycle and gasoline octane

On Wed, 16 Aug 2006 04:12:02 GMT, David Lemper <pdlemper@xxxxxxxxxxxxx>
wrote:

It is said that :
1. a high compression internal combustion engine is more efficit as
it goes out further on the Carnot cycle.
2. High octane gas ( eg 91 ) has less energy density than 87 octane.

Questions :
1. Will a high compression engine get more miles per gallon than a
lower compression engine in the same vehicle ?
2. Considering the increased cost of 91 octane, does a high
compression engine produce a saving or added cost to the
economy ? Is there any data ?

David Lemper

Not quite the answer but make your head spin.

http://www.team-integra.net/sections/articles/showArticle.asp?ArticleID=233



Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs (among other things) http://www.viatrack.ca

void _-void-_ in the obvious place



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