I recently read this:
"If it is one of the recent engines that uses fuel injection, you
will not be able to alternati ly fuel the engine. Alternative fuels
may have contaminants that will cause injector problems."
on <http://outlands.tripod.com/farm/s01.htm>
Is this true?
Michael Dewolf
Biofuel at Journey to Forever:
http://journeytoforever.org/biofuel.html
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Mike,
I went to that site and read what was said. He is referring to using a
modern gasoline fueled auto engine to run a generator after the fall of society.
What he says is partially true.
A multi-port fuel injected engine is controlled by the computer that is
located in the vehicle. The computer is fed information on hundreds of
parameters by dozens of sensors. The computer is calibrated to gasoline fuel and
a stoichiometric air /fuel ratio of 14.58 to 1. Different fuels (eg alcohols)
require different air/fuel ratios. The injectors are capable of flowing the
proper amount, but the computer can't compensate for increased flow- that is
unless there are sensors in the fuel that tell the computer what kind of fuel is
in the tank. Yes, that exists as well. The automotive industry has a sensor that
will tell the computer how much alcohol is in the fuel tank, and the computer
changes fuel flow, timing and a few other parameters so the engine runs well on
that blend. A variable fuel vehicle will then operated on any alchohol/gasoline
blend from 0 to 100%. GM marketed several flex fuel vehicles in The States. The
change in engine performance is invisible to the customer.
Diesels are a different matter. Their stoich. ratio varies from 14 to 1 up
to 78 to one. Just about any combustible fuel will run a comression ignition
engine. That's about it in a nutshell. Helpful?
Joe
Biofuel at Journey to Forever:
http://journeytoforever.org/biofuel.html
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