motronic ecu operation

[pasbogdan]

I an trying to understand ecu operating in a more complicaded way.
The simpple way is:ecu gets imput signals from different sensors(rpm sensor,cps,knock sensor,air temp sensor,water temp sensor,maf,map,altitude sensor,oxigen sensor...) and decides:ignition point,fuel quantity,boost level.
So,all people are talking about MAPS,but only fiew of them know what exactly is a map,how is ecu creating conections to choose the right"answer".
It is a kind of:if knock is above X level THAN retard ignition,or lower boost.
It is a kind of operating system,but only fiew of us know exactly how it works.It is lyke windows,many use it but nobody cares what is under the friendly interface...
I'd like to see a graph with o2 sensors output beeing analysed by ecu and the ecu decision.Why?Because i want to know what exactly ecu is does when o2 sensor indicates a large o2 quantity in exhaust gases.Ecu deliveres a large quantity of fuel to engine(because it is to small fuel) or/and lowers boost(because large o2 quantity in exhaust gases could mean less fuel or to much air)...
This can be hard,but step by step it can be explaned.Links,pictures,graphs etc.
Excuse me for my bad english.

[A80Avant]

good luck but i dont think you will find what you are looking for here.

[pasbogdan]

I don't expect any mercy,so i started my own documentation.
SO:motronic is using maps(lookup tables) this thing being the best way to make everything FAST.
Ecu looks in the lookup table and finds the right answer.This is faster than making calculations all the time,and we definetly need fast decisions of ecu,because air,fuel and ignition need to be changed,times being less than a seccond(but that is going to find out in our documentation)

http://www.motronic.ws/

Lot of work,but is interesting.

[A80Avant]

it is a nice wesite, i have seen it before.

[pasbogdan]

you have seen it before....aha!!!you already did your research.Maybe yo'll be kind to help us too.
Motronic needs a friendly interface,with "fie/new"
or:"options/ignition timing/edit"
Seriously,there are any software to help users with changing data?my eyes hurts from all that numbers already

[Jamo]

The forum has been linked to on here a few times

[A80Avant]

nah, i do this as a hobby,and all the info in your site basically sounds alien to me. If someone would be able to translate values that motronic reads into what most aftermarket ECUs use, that would be ideal,but since motronic is MAF based, even if you end up with a map, you need experience to know what the equivalent of 'load' that motronic uses, actually is.

In modern map based ECUs, you have map vs rpm. So when looking at the motronic, you end up having a rough idea of what is happening, unless you have a live connection to it, and do a proper datalog, which would plot a map of the map / load equivalent, and therefore the MAF values for what the motronic translates to load, would be more understood.

[pasbogdan]

http://www.s2forum.com/forum/showthread.php?t=18390&highlight=remap

Did not find this with the search in s2 forum,found it on google.
The guys talked in 2006 about a something similar to honda but for audi.It's been 3 years since.Mihnea said if he would have time he would do it,but ho knows...
What could be in this moment the most friendly software for us?What about hardware?how we read data from eprom?

[Tonks4x4]

Do a search for WinOLS. And atlantis software. Both of these allow you to view the hex maps on the chips. winols also tries to highlight the seperate maps for you.

[Jamo]

http://www.s2forum.com/forum/showthread.php?t=40651

[andy10v]

What about hardware?

So far my shopping list is

eprom reader/writer
eprom emulator
eprom chips

I guess you could alter the map then try it on the car and repeat but an emulator seems like a better idea.

[UrS4boy]

....Mihnea said if he would have time he would do it,but who knows...

I think Mihnea is a great guy but I seriously doubt that he would give away the knowledge he has gained about the AAN/ABY/ADU ECU free, to a forum. It's the way he and MRC make their living. To think different is naive.

In my opinion, if you want to mess around with your engine control system, you would be better off going to VEMS which seems to be an open architecture software with lots of (other) forum support. Motronic is pretty much a closed shop, funny handshake, secret cabala thing.

[pasbogdan]

It is not going to be a track car(big avant),so i just want to change some things,and the seccond reason is passion.200+ eur for a remaped eprom can be payed,and i will pay for one,but i'd like to know exactly what i'm buying..And all of us should know what we are buying.

[A80Avant]

which is why most of that couldnt learn the motronic language,just went to VEMS

[pasbogdan]

So far my shopping list is

eprom reader/writer
eprom emulator
eprom chips

I guess you could alter the map then try it on the car and repeat but an emulator seems like a better idea.

what tipe of emulator is our ecu requiring?
Emulator can be usb pluged to a pc and make adjutments to data without the need to take of an eprom,write it and put it back?