ecuedit wrote:Because when you put 18 you get MAP limiter actualy used as primary injection limiter and MAF limiter completely ignorred. If you check for sample Cargo EDC15C2 or EDC17C7 ecu that has no MAF sensor for sample Citroen Jumper or Peugeot Boxer, they are MAP based cars, you will see that there is actually number 18 as well.

wld wrote:Oh, now I see !
Software from 2.0 8v 110HP engines has a nice, fat 16X16 MAP smoke limiter, which has been replaced with the 2x2 one on 2.2hdi engines. You cannot get a good smoke map with just 4 values, so I guess this mod should not be done on street cars.
The MAF is big on those engines anyway so it should be good for over 200HP.

ecuedit wrote:
Maybe hard to believe but 2 x 2 is enough. Because if you take for Example Mercedes Benz diesel cars are mostly MAP based. And if you open for example 5 different bins from 5 different cars/engines, you will see that MAP smoke limiter as it is is pretty linear.
You can decide how your axis for rpm will start and end and by that you can decide y=kx+n what will be your k and how steep that line will be until it stops at the higher rev axis value, and at the higher rpm value you stop where you wish your AFR will be good enough not to smoke, but you calculate that based on volumetric efficiency of engine and other factors.
I hope i explained well. By that strategy you can have nice MAP based car on the road with pretty good efficiency.
Mine 2.2 HDI took average 6.5L-7.4/100km combined normal ride.

So you put range of rev :revX revY where revX < revY close enough but that revY stops from point where you wish full power...

Sample picture attached.

lostsoul wrote:testing on my renault 1.9dci and looks promising... :D
Still not find the smoke limiter by map...

user202 wrote:

ecuedit wrote:
Maybe hard to believe but 2 x 2 is enough. Because if you take for Example Mercedes Benz diesel cars are mostly MAP based. And if you open for example 5 different bins from 5 different cars/engines, you will see that MAP smoke limiter as it is is pretty linear.
You can decide how your axis for rpm will start and end and by that you can decide y=kx+n what will be your k and how steep that line will be until it stops at the higher rev axis value, and at the higher rpm value you stop where you wish your AFR will be good enough not to smoke, but you calculate that based on volumetric efficiency of engine and other factors.
I hope i explained well. By that strategy you can have nice MAP based car on the road with pretty good efficiency.
Mine 2.2 HDI took average 6.5L-7.4/100km combined normal ride.

So you put range of rev :revX revY where revX < revY close enough but that revY stops from point where you wish full power...

Sample picture attached.

Please help how can I find the correct axis of it?
Is this map originally 80mm3 as I see.
So if I want a correct working I need to adjust as you make it?
But I didn't know wheather the x and y axis are in front of the 2x2 map as I marked in the pic?

Thank you very much