hi, is it possible to somehow send exhaust pressure values to ecumaster can lambda and get readings corrected based on exhaust pressure? right now have one car with emtron ecu 1 lambda in downpipe connected to emtron and 6 ecumaster can lambdas in individual cylinders, and because of exhaust pressure they are reading way richer, so I have thought maybe there is a way to compensate it somehow? thank you.
Not currently.
We can update the firmware to add this functionality.
We had a couple of questions about that already.
We will increase the priority for that task.
Can you send the exhaust pressure in kPa as a 16-bit value on a specified ID?
Or do you want the lambda controller to read the Emtron standard CAN stream?
I have no problem sending it in kpa in specified ID an as they all are on same bus they can receive that value all together, so no problems from my side.
Being very proficient in emtron myself, how is the back pressure calc setup? Is it feed forward, calc, or actual measurement? Also, you say downstream o2? Where is that, post turbo?
in my case those 6 lambdas are pre turbo so they are reading way richer compared to the one post turbo, in general it would be possible to measure backpressure and fill estimation table, but I guess actual sensor would be more accurate.
Well, you can calculate back pressure in a round about way. Why not disable all EMAP compensation on emtron since its post O2 and compare at that point? You will see a slight offset naturally. The EMAP comps in an emtron are all about airflow offset. Meaning as back pressure goes up you are removing total air volume through the engine. Yeah theres an O2 offset in there but you are trying to only offset the pre turbo right? Post turbo should have no back pressure.
Iām not using emap comp for air flow :)) but I would like lambdas to read properly, post turbo reads fine 
Build a custom math channel for the appropriate offset of upstream. You can in the emtron as well if the 6 upstream are going there over can. Can offset in can import aswell.
to be fair, I was not asking for an advice
You asked for a way to compensate. You were given a way.
1 Like