Air flow and fuel flow calculations 2

[gaber26111]

Hello everybody here,

First, that is not a student work, that is a work i do as freelancing task, if anybody hears about, well, here is what i need help about,

Take a look at that website, which offer engine simulator software, gives accurate calculations for the whole vehicle, with some input data, here is it:

http://www.speed-wiz.com/calculations/engine/engine-flow.htm

I made the calculations for the compression ratio, and displacement, and got very close, may be exact as the software output, and i am stuck with the air flow and fuel flow calculations using the input data which are there, so anyone can help with this?, and which formulas used?

Will appreciate your reply, and again not student work, as i know and respect the forum legacy,
Thanks

 

[dgallup]

What I don't understand is why you are trying to duplicate the linked web site when it is obviously deficient.

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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.

 

[black2003cobra]

I didn't bother to check the calculator on the web site, but stoichiometric mass air to fuel ratio for neat ethanol is 9.0...not 11.

 

[gaber26111]

hello everybody again, especially Brian

You're right Brian, the software does have a lot of mistakes, such as that stiochemtric air fuel ratio, having 90% gasoline, and 10% Ethanol, would be 14.13:1, so the 12:97 given by the software not right as you mentioned, about the fuel flow factor, it simply divide the 100% gasoline A/F ratio by that 14:13, to give 1:04 , so as the whole results are related to eachother, the others would still be incorrect

i just wanted to clarify that, for everybody helped with those calculations, and i really wonder how come a software like this is offered for sale, and saying that it's very accurate, while it has a lot of mistakes, so i just trusted it and came here to ask, and doubted my calculation results

So much thanks for everyone again, and special for Brian