munro
17-02-2013, 16:55
The map "limiter flue gas" in the control units Bosch EDC15 defines how many? of fuel to be injected, as a function of two variables:
- The amount? air ingurgitata from the engine and monitored by the MAF;
- RPM.
In EDC15C the z-axis expresses the amount? of diesel in mm^3
In EDC15P the z-axis expresses the amount? of diesel in mg.
Is cos? evident that, in order to define the stoichiometric ratio that you want to use ? need to convert the amount? from mm^3 to mg using the appropriate conversion factor.
This factor ? the density? of diesel varies from 0.82 and 0.85 as a function of the rail pressure used and the temperature of the diesel fuel.
Personally, I use 0,85 but does not pass much of a difference using a different value for the "close".
Cos? if your limiter fumes ? set to 60mm^3 (EDC15C) the quantity? injected (assuming that the torque limiter is set to ir? high) will be?: 0,85*60.
How do you know what you are initially injecting map sotck to the tablet?
Easy, you'll have to do a log.
At this point, you know how much diesel fuel injected to the engine.
But how much air is swallowed?
Easy, in the log you have to include also the MAF
You know now the two values also able to compute the AFR of the machine in the starting conditions.
There? you need even more? for one thing: to know in which area of the limiter fumes the map works! (and not ? 100% of the "load"...)
As if you have an emulator in real-time...
I would recommend that you look at the values of the MAF also to a minimum.
Cos? doing you will know the upper and lower limit of the working area of the map, the flue gas pressure conditions the original turbo, and you know exactly where to edit the map
At this point, there is nothing to do but choose what you want to achieve.
- Set up the new AFR in the map with knowledge of the facts considering the fact that the AFR of the diesel has a good value for not smoking is 16.5 but I often go ir? at the bottom on the basis of the experience of the personal limit of smoke is acceptable and results to be achieved).
Good job.
Munro
- The amount? air ingurgitata from the engine and monitored by the MAF;
- RPM.
In EDC15C the z-axis expresses the amount? of diesel in mm^3
In EDC15P the z-axis expresses the amount? of diesel in mg.
Is cos? evident that, in order to define the stoichiometric ratio that you want to use ? need to convert the amount? from mm^3 to mg using the appropriate conversion factor.
This factor ? the density? of diesel varies from 0.82 and 0.85 as a function of the rail pressure used and the temperature of the diesel fuel.
Personally, I use 0,85 but does not pass much of a difference using a different value for the "close".
Cos? if your limiter fumes ? set to 60mm^3 (EDC15C) the quantity? injected (assuming that the torque limiter is set to ir? high) will be?: 0,85*60.
How do you know what you are initially injecting map sotck to the tablet?
Easy, you'll have to do a log.
At this point, you know how much diesel fuel injected to the engine.
But how much air is swallowed?
Easy, in the log you have to include also the MAF
You know now the two values also able to compute the AFR of the machine in the starting conditions.
There? you need even more? for one thing: to know in which area of the limiter fumes the map works! (and not ? 100% of the "load"...)
As if you have an emulator in real-time...
I would recommend that you look at the values of the MAF also to a minimum.
Cos? doing you will know the upper and lower limit of the working area of the map, the flue gas pressure conditions the original turbo, and you know exactly where to edit the map
At this point, there is nothing to do but choose what you want to achieve.
- Set up the new AFR in the map with knowledge of the facts considering the fact that the AFR of the diesel has a good value for not smoking is 16.5 but I often go ir? at the bottom on the basis of the experience of the personal limit of smoke is acceptable and results to be achieved).
Good job.
Munro