AUDI - How to calc SMOKE,LAMBDA 2.0TDI EDC16U31

[Junkyard Dog]

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[mjieteq]

Here's a little formula you can play with: AIR MASS =((BOOST-(6.1078*10^(7.5*TEMP/(TEMP+237.3))*HUMIDITY))*100*VOLUME/(R_CONST*(273.15+TEMP)))*VE.
BOOST in mbar
R_CONST=287.058
HUMIDITY= relative in decimal percentage eg 78%= 0.78
TEMP= in C
VOLUME in cc=1968/4= 492
VE= decimal percentage eg 90%= 0.90

Ok, but what is unit output of this air mass computing formula.
Made compute with inputs: 2400mbar as boost, 0,9 VE, 0,78 hum, 20*C, and 1968ccm volume, but the output result is nonsens to me: 5013,10235... and what is that?! I tried to different conversions, but none of them gave me any even near to good, understandable results. I thought also about 5013,10235 is corrected volume of cyl, but it doesnt make sense to me and all next maths looks like wishful thinking and cherry picking, doesn't happy me.

[DiegoStud]

Well hello,

I suppose you are right; I omitted to include Airmass is specified in mg/stroke. Given every other unit is in metric, and this is a thread regarding EDC16 where airmass per cylinder has always been specified in mg/stroke, that ought to have been self evident.

You could use 492 instead of 1968, as it would appear I did write 1968 divided by 4 in the above quote. Or, at least now you know what the answer would be if your engine were 4 times larger.

Not my problem if it doesn't make sense beyond that, but the laws of physics still apply where I live.

[mjieteq]

Not my problem if it doesn't make sense beyond that, but the laws of physics still apply where I live.

Hehee.. of course, you are right. Was my fault. I discovered the answer of my question next day having fresh head and free time to think about it - I was tired, sorry. And moreover forgot to write it here, but maybe it's good. It might be we will help with that for someone else. Thanks for the response.