calculation afr....let's talk

[voglioimparare]

hi all, I was wondering kindly if someone ? can explain how to do correctly the calculation of the afr in a diesel engine..I enclose a map example

http://www.professionalchiptuning.ne...era-vt133.html POST N3.

what to take to a reference to calculate the original one? then once you have made the mod, as I reported esattamnente ( or almost) to the afr series?

I saw that on the drive type golf 7 , if you do not keep an afr similar to that of the series (17), the filter regenerates frequently, so I would like to understand if there is a real formulina to apply.


to you the word!

[voglioimparare]

anyone guys?

[sergiot]

the air flow ? in the mapping of the air lens
the flow diesel ? in axis with the same mapping
a control and tweaks to the unit? measurement
then the ratio

[Quattro]

the air flow ? in the mapping of the air lens
the flow diesel ? in axis with the same mapping
a control and tweaks to the unit? measurement
then the ratio

Sergio, if I'm not mistaken, the ratio of the air/quantity? diesel fuel is injected just before the prex maps...share the thought?

[voglioimparare]

the air flow ? in the mapping of the air lens
the flow diesel ? in axis with the same mapping
a control and tweaks to the unit? measurement
then the ratio

hello,could you be more clear ? explaining maybe that calculation do you do? I have attached the file ori affixed I think this might be of interest to all as ? important x to do a good job..

[sergiot]

map prex????? what?????
there is a map of afr but ? only a limiter, what was once the map of the smoke.

[Quattro]

map prex????? what?????
there is a map of afr but ? only a limiter, what was once the map of the smoke.

I spoke to you of the map prex turbo...this? c'? a limiter on this map which is called the (air as a function of the diesel) and ? the one that equilibria of this relationship.
With regard to the AFR I wanted to ask if you could be more? accurate on the maps to which you refer, perhaps putting a file of the study.
Thanks

[voglioimparare]

I spoke to you of the map prex turbo...this? c'? a limiter on this map which is called the (air as a function of the diesel) and ? the one that equilibria of this relationship.
With regard to the AFR I wanted to ask if you could be more? accurate on the maps to which you refer, perhaps putting a file of the study.
Thanks

I have posted a sample file on purpose, I see that you are interested in most people the thing from the guys we do a good thread with a good explanation

[voglioimparare]

next boys nobody's? calculate the afr??

[sergiot]

let's take an example
I read in the map limiter, the maximum torque value = 370 nm at 2000 rpm/min
I go on the map pair - diesel and 2000 rpm and 370 nm I find about 74 mm3 (interpolating between 350-68,7 and 400-83,9)
turn 74 mm3 x 0.9 = 66,6 mg
I go on the map fuel - to-air and for 2000 rpm and 74 mm3 find air 1000 mg
divide 1000 / 66,6 I find afr= 15,01