[Diy_efi] Re: Diy_efi Digest, Vol 21, Issue 19

Mike niche
Thu Nov 23 08:27:55 UTC 2006


At 02:13 PM 11/23/06, you wrote:
>Gents,
>   What about using an ultrasonic fogger instead of heat to produce a vapour?

You mean a mist ?
Heat will evaporate the fuel producing a vapour, ultrasonics produces a
mist which might further turn into a vapour if the air is warm enough and it
has enough time before being sucked into chamber. The amount of energy
you'd need with ultrasonics and drive electronics might probably outweigh
any benefit,

rgds

Mike



>Regards
>Bill
>
>>
>>Subject:
>>[Diy_efi] Evaporative fuel injection (evolution of the evap carby)
>>From:
>>"Ben P" <benof1987 at hotmail.com>
>>Date:
>>Wed, 22 Nov 2006 20:11:21 +1000
>>To:
>>diy_efi at diy-efi.org
>>
>>To:
>>diy_efi at diy-efi.org
>>
>>
>>Hi people, after reading through all of the 'instant fuel economy' sites I could find on the net (except stuff like hi-clone), I thought of an idea I would like you guys to have a think about (and then go on to poke the s*** out of it). Also, whats the deal with these carby mesh systems? My dad's telstar (aka Mazda 626) had a heated mesh under the carby, and it went like a cut snake, but I am unsure of fuel economy.
>>
>>Evaporative Carby Evolution
>>
>>The typical evaporative carby heats the fuel to a gas, which then mixes with the air-stream better than a conventional jet/discharge nozzle combination would. One major advantage of this type of carburettor (apart from apparently huge economy benifits, which would be there, but maybe not so dramatic) is the ability to run on pretty much any hydrocarbon fuel, this includes (filtered) used crank case oil, if the carby heats enough. The only real disdvantages of this carby are a loss of power (hot air tends to do that), and if the carby isnt heated enough, 'lighter' parts of the fuel go first (giving an impression of huge mileage), then the heavier parts boil much later, giving
>>
>>My idea involves feeding fuel to a heated block (200-300 degrees, maybe hotter depending on fuel), which would effectively instantly boil all of its components and feed the fuel vapour into the intake stream, prefferably in a multipoint configuration. The fuel going to the heated block would be controlled by a pulsed valve much like an injector, but just controlling flow, not spraying the fuel as well (proper design of the heated block should negate the need for that).
>>
>>As an addition, water could also be added to the block to keep it clean, prevent detonation, and keep the engine clean. Although this would mean the blocks would need more heat input to mainain the same temperature.
>>
>>The only disadvantages I can see apart from the slight loss of power are a high current draw (if the blocks are electrically heated, the only way to get them hot on a cold start), and if the blocks are not electrically heated, the problem of what to do while the engine is cold (before the exhaust manifold gets hot enough to draw heat from.
>>
>>thoughts people?
>>
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>>
>>
>>
>>------------------------------------------------------------------------
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Regards from


Mike
Perth, Western Australia
VK/VL Commodore Fuse Rail panel that wont warp, twist or melt, guaranteed  !
Twin tyres for most sedans, trikes and motorcycle sidecars
http://niche.iinet.net.au




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