Interesting that they left out producer gas. It seems to work best at diesel
ratios. Also interesting that they only list 22:1 for IDI diesel, many engines
are 25:1, but some are only 16:1. And they also don't differentiate between
turbo and NA. 


On Fri, May 03, 2002 at 12:49:45AM -0500, MH wrote:
>  Table 1: Engine Types, Fuel Systems and Compression Ratios, by Fuel  
> 
>                        Engine Type, Fuel System, Compression Ratio Used 
>  Gasoline                SI                 mono              up to 11 
>  Diesel                   CI                 mono       18 (DI) 22 (IDI) 
>  LPG                     SI              dual, mono           11-13 
>  Natural gas           SI               dual, mono           11-13 
>  Methanol           SI, CI, FC      FFV, mono        9 (FFV) up to 19 (mono) 
>  Ethanol                SI, CI          FFV, mono        9 (FFV) up to 18 
> (mono) 
>  Biodiesel              CI               mono (FFV)         similar to diesel 
>  Hydrogen            SI, FC           dual, mono             14-17 
>  DME                   CI                 mono                similar to 
> diesel 
> 
>  Notes: For engine and vehicle types,
>  CI = Compression Ignition; SI = Spark Ignition; FC = Fuel Cell;
>  mono = vehicles running on only one fuel;
>  dual = vehicles with two fuel systems, able to switch between the two fuels;
>  and FFV = Flexible-fuelled vehicle, able to run on two different fuels or a 
> mixture of them.
> 
>  Diesel engines have either of two types of fuel injection: direct injection 
> (DI)
>  and indirect injection (IDI). DI engines inject the fuel directly into the 
> cylinder. 
>  IDI engines have a small combustion pre-chamber where combustion starts. 
>  IDI engines are less efficient but they allow operation at higher speed,
>  produce less noise and use cheaper injection equipment.
> 
>  Excerpts from: 
>  Automotive Fuels for the Future : the Search for Alternatives 
>  Published: 08/1999
>  http://www.iea.org/pubs/studies/files/autofue/autofue.htm
> 
> 
> Biofuel at Journey to Forever:
> http://journeytoforever.org/biofuel.html
> 
> Biofuels list archives:
> http://archive.nnytech.net/
> 
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> 

-- 
Harmon Seaver   
CyberShamanix
http://www.cybershamanix.com

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