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Old 01-02-2008, 05:53 PM   #21
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Originally Posted by usedgeo View Post
You better patent that one.
They don't already have that?

I thought it had been thought of but nobody used it. I was going to do that for the direct injection in my toyota project amongst the hundreds of other ideas i have drawn up that i never see companies using. I guess I figure if a guy just starting his degree can come up with it and it isn't in use that it must not be that good of an idea lol.
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Old 01-02-2008, 08:30 PM   #22
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LOL.

Direct injection has been done. VW Lupo - air & fuel injection timed just right with turbo = 90mpg.

I think Vespa has 2 stroke using small pistons to inject air and fuel for a clean burn 2 stroke.

The tech is there for 100mpg cars that are not hybrids. We are just not allowed to have it.
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Old 01-02-2008, 09:28 PM   #23
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toyota/lexus has had direct injection engines since 01 or 02...not in america necessarily but they wdo.
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Old 01-03-2008, 06:21 AM   #24
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Have you given up on the project? Do you think with the right pool of people it could be made safe? What other challenges did you face?
I don't understand why you can't just put a flame arrestor/filter (like on all camping stoves or anything that uses propane) right after the carburater and not worry about exploding yourself.

I read this on another site and thought it'd be fun to try, just not sure what a good container to use is, I'm thinking maybe a hacked up 1 gallon gas can and I'm not sure where to get the elephant diapers.

Plus as cool as it sounds to have the air 'wick' the fuel directly, I would think proximity of moving air to level of fuel and area of 'wick' exposed to air (like amount of wicking material used) would make a difference in how much a given amount of air absorbs as well and tuning that would be a nightmare.

As for wrapping the fuel line around the exhaust, I would think this would vapor lock for sure, even in FI, the injector can't inject (or meter anyway) fuel vapor. The fuel is only at 45psi or so, that's 3 atmospheres and doesn't affect boiling temp all that much compared to the temperature at the headers. The things I've read suggest wrapping around the coolant lines instead, then you get a good 200F or so which helps but isn't enough to vaporize anything and you also cool the engine a bit.

Also what I've already REALLY wanted to try was to take a propane metering device (like from an LPG conversion kit) and have that meter from a sealed container (like an old soup can) that was welded/soldered/glued to the exhaust headers and fed directly somehow, maybe with an old fuel injector wired to inject if the pressure inside the can drops below a certain threshold (easy enough to rig up). My issue was the gas metering devices from LPG kits are like $200 and I don't have that for a concept that everyone is unsure about.

Although I definately believe that fuel injectors don't vaporize at all, atomization is not the same thing and most don't do it all that well. The fact that some fuel is used simply to absord heat as it boils in the cylinder makes sense to me. My old TBI I can see the wet 'dew' of fuel on the throttle body walls, definately not doing something right.

So in conclussion, does someone want to build me a Crower cycle engine that runs on already vaporized fuel so I can win the automotiveX prize? Come on I'll weld you up a nicely skirted and streamlined CRX to throw it in :-).
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Old 01-03-2008, 07:46 AM   #25
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Originally Posted by kamesama980 View Post
toyota/lexus has had direct injection engines since 01 or 02...not in america necessarily but they wdo.
I meant direct injection through the exhaust valves.

When the engine is fully heated up and under partial load the fuel is injected close to it's flash point and when the engine is under heavy load it gets injected hot enough to be at or above the flash point(like a diesel except the fuel is at flash point not the air it's getting injected in to). In either case it should be all vapor being injected.
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Old 01-22-2009, 10:54 AM   #26
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hi, are there any updates on fuel vaporizers?
has anyone else tried them, and what were your results?
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Old 01-22-2009, 09:41 PM   #27
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Gasoline boils at 110f under 45psi it is higher but if you heat it to 300+ you are pushing the temp up closer to autoignition so detonation will be a big possibility. Then you have to think about the possibility of leaks and fire. this is a bad idea all around. I bet your big gain in milage was more the driver than anything you added to the car.
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Old 01-24-2009, 06:05 PM   #28
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hi, are there any updates on fuel vaporizers?
has anyone else tried them, and what were your results?
I tried the fuel vaporizer 2000 a few years ago. At the time they were sold with a money back guarantee if you were not satisfied. I used the money back guarantee if that tells you anything.
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Old 01-28-2009, 12:43 PM   #29
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The science is not impossible. The lean-limit of gasoline vapor is something like 70:1 IIRC. I've done some mildly successful idling experiments. . . but never done any drivable experiments. Someday, when I get the time. . .
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Old 01-29-2009, 05:57 AM   #30
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2 words for why it won't work:

Vapor Lock

If you want a gaseous fuel, look at converting it over to propane.
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