Quote:
Originally Posted by leew88
It all depends if the "map-out" retains the stratified running mode, but I don't see how that's going to work because the DME needs it's algorithms to determine when and when not to run stratified and switch between homogeneous mode (depending on conditions). If it's mapped out then effectively you have no data from the NOX sensor so the DME will resort to emergency homogeneous mode.
There is also a reason as to why there is a separate ECU attached to the NOX sensor for all these extra processing. I would like to see a vehicle with a NOX mapped-out with INPA showing the running mode - you are able to get it into stratified by pressing the throttle lightly above 1.5k rpm to see the switch happening.
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This is exactly a question I am trying to get answered by tuners...how do they reset/remap msd80 when they delete/ map out nox sensor
as far as I am aware the nox system consists of 2 major parts:
nox sensor (which reports to the msd80 through canbus in a binary code something which could sound "hallo...here is nox sensor, all my electrical connections are OK, heating of sensor head works, actual temperature in exhaust is XY Celsius and actual nox concentration is 5ppm..." and if this report is accepted by msd80 it allows all 3modes...)
nox catalyst (which is managed by msd80 on the basis of an algorithm which calculates catalyst cloging...which you can also see in inpa or ista... on the basis of either kms driven or fuel consumption...and then decides when to start regeneration if all the necessary conditions are in place...incl at least half of the tank and speed at least 110kmh);
the trap here is the fact that even with nox sensor delete and even with catalyst physically removed you still have the msd80 calculating the clogging and when it reaches a critical value (not sure if it is 3000mg or more...) it reports 30e9 error and stops stratified; one thing which I tested was an encoding of "virtually new" nox catalyst in ista...which than leads msd80 to reset clogging value...but it is always only part time solution....so I wonder how the tuners stop msd80 calculating catalyst clogging without an impact on all other linked processes and algorithms...