OM606 Turbo Selection for Truck application

baldur

05-17-2020, 08:29 AM #26

(05-15-2020, 08:52 AM)jav1 No - I didn't take it as snarky at all... I didn't know the "roll eyes" thing either so ignorance is bliss?

On the table thing - that helps because in the table I referenced - "fuel request table"-, which is the main one I've played with to tune my fueling, I have values from 50-90 in my top values row which corresponds to- 100% throttle position. I'm still not 100% understanding the relationships between "ALL" the tables and it doesn't help that being rather new, I struggle to find certain things as referenced because the names used don't always match up perfectly nor are they all under the same "tab" in the software.

For example- I can't find a "rack position request table" under the tables tab... BUT- I do find a "simple rack position request f (fuelrequest)" under the rack control paramters tab... which I surmise is the table you are referring to but, not knowing all the tabs inside and out- I second guess things when the names used don't match up with the software names 100%?

In my pea brain from what I gleaned from Baldur- the "simple rack position request f (fuelrequest)" parameter defines how the fuel injection rack moves in response to fuel request values (0-100%). That parameter should have a max value of 2100 according to Baldur, as that 2100 number represents (approximately) the "full- bottomed out" rack travel value on most stock 606 pumps. But now- if that parameter establishes the relationship between rack command value and fuel request values, I don't understand why the parameter has correlations from 0.0 - 250 when my maximum fuel request value is 100??? In my tune- I set "simple rack position request f..." values at 260,740,920,1390,2100,2100,2100,2100. with the first 2100 value represented at 100 and all values above 100-250 still having the 2100 rack command value. Is that right? I think so but I'm not 100%??? Does this parameter suggest we could have fuel request value up to 250 in the fuel request table?? I'm sure Baldur has a good reason for doing this but not knowing what he knows, it causes me to question if I really understand how to fully use all of the controllers capabilities or if I'm doing it right?

I should explain that due to differences from pump to pump and controller to controller the rack position sensing can vary slightly in its reported range. The injection pump will make a sound when it hits full travel and the range from the stop position to full travel is generally from 290-340 for stop and 2100-2200 for full travel, with slight variations from pump temperature which is why I recommend doing the final calibration of this with everything well warmed up.
The fuel request can go all the way past 600 but with the standard map numbers above 100 won't make any difference, since the pump goes to full rack at 100. When setting up calibrations for 7.5 or 8mm pumps I make use of numbers higher than 100.

Baldur Gislason

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