Quote:
Originally Posted by oil pan 4
I think the best way to test fuel vapor is just to go straight to propane. You know it is 100% vaporized. There no possibility of any less than that at room temperature at 1 atmosphere of pressure. Unlike gasoline you can accurately meter propane into the engine.
Most fuel vapor setups just hap hazardly vaporize the gasoline at what ever unpredictable rate according to temperature, atmospheric pressure and volatility of the gasoline being used. Where propane flashes to vapor immediately upon depressurization.
Also a good portion of the chemicals in gasoline do not evaporate.
Now propane may seem like a dangerous on road motor fuel but when done correctly its much more commonly found as a motor fuel out side of the U.S. in south America and Europe. It doesn't seem to be any more dangerous than gasoline when used correctly.
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I have posted links in the past to the Clackamas, Oregon company that developed a gasoline vaporizer to the point of testing at a California EPA testing facility.
Clackamas engineers' invention improves fuel economy | OregonLive.com
They have measured a 30% fuel economy improvement.
However, notice that they are heating the fuel and air to maintain the stoichiometric balance to keep NOx down. Thus, they have changed the combustion dynamics of the fuel mixture. Fuel vaporization in and of itself is not the cause of increased economy potential. It is the added heating of fuel and air. Contracting the combustion pressure curve results in increased fuel efficiency. With the increased mixture heat, they claimed to be able to reach 50-90% fuel economy gains though NOx pollutants were high at these lean mixtures.