Quote:
Originally Posted by Allch Chcar
You should look into oxygenated fuels before you look at direct injecting oxygen. Specifically, alcohols like Ethanol and Methanol. Not only are they cleaner and more efficient than Gasoline but they make more power. Their biggest disadvantages are less energy in a gallon and cold starting problems with early FFVs. Newer higher compression engines work even better and current FFVs have special startup routines in addition to more Gasoline content in the winter. The earliest FFVs were designed to run on Gasoline, E85, or even M85.
Methanol has an octane value of 112 while Ethanol has an octane value of 110. But it drops to about 96 octane in E85, M85 is unknown.
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I appreciate the insight. I haven't decided what fuel to use in this experiment yet, but would definitely anticipate an "Earth-friendly" fuel, especially a renewable one if possible. Can you explain further how E & M are more efficient and make more power even though they have less energy content?
In terms of compression within the cylinder, what is the difference between 112 octane vs. 110 octane? How much more compression can a 112 take compared to a 110?
This table was helpful for me:
Fuel Comparison Chart
Quote:
Originally Posted by RedDevil
The exhaust will have to be rust proof though, as the hot oxygen remains would be all too happy to bond with any free metal.
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What would be a good material to use? Ceramic exhaust, stainless steel? I would think ceramic would be best, especially if we use it in the cylinder itself.
Quote:
Originally Posted by Occasionally6
About 20 years ago there was an aircraft used either for a distance record or high altitude atmospheric observation that used cooled, recycled exhaust gas as the working fluid, with O2 tank storage to enable the combustion of the fuel. The excess exhaust gas was bled off. That was done to maintain the engine power output in a low pressure atmosphere.
I understand that some submarines use something similar when submerged.
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I was working on that exact thought when you posted. I'll attach the diagrams I came up with.
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What do you guys think about these? I *think* I have everything figured out, except how to "create" enough oxygen on-demand. I don't have any intention of using a medical device, rather the idea of using a "filter" like zeolites to increase the oxygen content.