Hello all..... ethanol contains oxygen and will disturb the fuel/air ratio of the fuel. Engines with carburettor have to be adjusted to the proper CO level, since this value is the receipt of a proper combustion. Injected engines with catalytic cleaning usually have a range for adding more fuel to the air/fuel ratio, determined by the amount of O2 in the exhausts. Some systems can adjust to 30% of ethanol in the fuel, others have a thinner adjustment line. A good way of finding out which is to measure the exhaust fumes according to the specifications of the engine manufacturer. Keep up the good job ! Jan Warnqvist AGERATEC AB
[EMAIL PROTECTED] + 46 554 201 89 +46 70 499 38 45 ----- Original Message ----- From: "Zeke Yewdall" <[EMAIL PROTECTED]> To: <Biofuel@sustainablelists.org> Sent: Monday, September 12, 2005 3:32 AM Subject: Re: [Biofuel] Ethanol in the Philippines - just put it in and go? > I was trying to theorize on what using a 100% ethanol fuel would be > like. From MH's experience, it seems pretty obvious that 10% or even > 25% ethanol has no ill effects and could actually run in unmodified > gas engine better than 100% gasoline. > > I wanted to add to the reply below. . . > > > Zeke Yewdall wrote: > > > > My understanding is that ethanol will run fine in existing gasoline > > engines. The difference is in compatibility with seals, and ability > > to vaporize at lower temperatures. It's got a bit higher vapor > > pressure, so in northern US, it can create hard starting in the > > wintertime. > > Having lived in a northern climate (Wisconsin, Minnesota, USA) > I found it harder to start my gasoline vehicles when they have > water in the gasoline line and it freezes up but now with > 10 percent ethanol blended gasoline this has eliminated that > problem, thank you. Methanol (HEET) caused some problems for me > in my 1946 pickup truck and some of my 1960s and 1970s > gasoline vehicles when methanol reacted with the rubber fuel > filler hose connection to the fuel tank and carburetor floats. > > > It does have a bit lower energy content per gallon, and higher oxygen > > content, which could confuse the electronic controls systems that most > > cars have now. They measure input airflow, and oxygen content in the > > exhaust, and decide how much fuel can be put in and still assure > > complete combustion. I don't know if ethanol might mess this up. > > Older cabureated cars you'd probably just have to reset the jets. > > Using 10 percent ethanol blended gasoline I've gotten better fuel > mileage in the summer with it but less so in the cold winter. > My carburetor vehicles worked fine with 10 percent ethanol blended > gasoline fuel without adjusting the carburetor jets. > > > The lower energy content per gallon also means that the mpg is a bit > > less. Somewhere around 10% I think??? If you designed the car to run > > only on ethanol, then you can typically use a much higher compression > > ratio (12:1 or so instead of 9:1 or less). This gives you back alot > > of the performance and mpg losses from using the lower energy content > > fuel. > > My use of 10 percent blended gasoline has not decreased my > average annual fuel mileage. Its still 48 miles-per-gallon. > The rusted front brake rotors did but thats been fixed. > > > As far as seals, I haven't heard anything on ethanol causing seals to > > degrade, but I may be wrong. Just a few days ago on this listserve, > > there was a discussion on methanol, and the possibility of high > > concentrations of it hurting the aluminum and light alloy engines. It > > seems like if it did have issues with corrosion or rubber degradation, > > 10% would be enough to cause them, and since most of the winter gas > > sold in the northern US is 10% ethanol for pollution control, I > > imagine it doesn't. > > I haven't noticed any degradation while using 10 percent ethanol. > There was a report several years ago done at the University of > Minnesota - Mankato that used up to 25 percent ethanol blended > gasoline fuel and it worked here in the northern USA climate > though I haven't read the details. I also read a report done > in the 1940s by the University of Iowa - Ames that also worked > well using ethanol blended gasoline fuel in carburetor vehicles. > > > I wonder if they are using 100% ethanol, or ~95% ethanol (which is > > what denatured ethanol usually is -- a little gasoline put in to keep > > you from drinking it), or 95% ethanol/5% water which I understand is > > the highest purity you can distill it to. At that ratio, it forms a > > constant boiling mixture, and you can't get it to 100% pure by > > distillation. Does anyone know how they get the last bit of water > > out? And whether it would affect the engine if they didn't? It's in > > solution, so I imagine it would just cause a little more water vapor > > in the exhaust, and slighly lower mpg. It shouldn't cause freezing, > > since I've tried to freeze 100 proof vodka, and it stays liquid at > > -10F, and this woud equivalent to 190 proof. > > Huh, hows 100 proof equivalent to 190 proof ? > > Ooops. Indefinite modifier, or whatever they call that grammer > error.... I meant that 95% ethanol would be 190 proof. > > > My two cents. > > _______________________________________________ > Biofuel mailing list > Biofuel@sustainablelists.org > http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): > http://www.mail-archive.com/biofuel@sustainablelists.org/ > > _______________________________________________ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
