MARELLI MJET impariamola!

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Originally Written by Fede78

But the fact that by changing the bit to 06112A gi? I cut more?... you know what match I'm bit that I edited?

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I really do not know what is, but this is not the limiter pressure hose..

Let's examine the map main injection as it is called in the ECM, it is a map, 16 x 24 ( 16 columns and 24-line) visible to 16bit, many argue that it is a map inverted, others not.. but the concept of the interpretation of the map and all wrong, in fact, not the year of the rpm x load, etc.. but bens? on the X-axis we have the Rail pressure while on the Y-axis the amount? injected IQ measured in mm3/str (mm3/stroke)
the name of the map ?: SR - Main inj. ctrl - Injector map for small Qmain: f(Prail,Qmain)
value X = (2 x Eprom) -100 offset - pressure
value Y = (0,002930 x eprom) - IQ

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Originally Written by Backgroop

I really do not know what is, but this is not the limiter pressure hose..

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For? I cut more?.. from the diagnosis, I read over 1.5 bar without going into recovery as before.

With respect to the rail... I looked in the MJD8 there are two entries...
"On threshold to recognize overpressure event " value 1750 (eprom*2-100)
"Off threshold to recognize overpressure event" value 1680 (eprom*2-100)

These should be in the MJD6 with values maybe more? low...
Do you think this may be caused by these instabilities? if you climb over 1480bar or and the light of recovery, even with the mod that you suggested (the two bits that only 1450bar)
The warm-up map should be used only in the phase of heating of the engine... at least going behind the name of the map

the damos, however, should say if ? positive, negative, or no...
from the shape of the map according to me...the last curve on the right,the most high of all,it corresponds to the injection time for the bottom press rail and the lower amount? injected....in fact, the time of injection ? very long..***** and in a normal map Tinj where in fact the curve is trovva at the beginning of all the others looking at the map always in 2d..

Another map to consider this when changing the Rail pressure and the map:
SR - Main inj. ctrl - Minimum main quantity: f(Prail) map 16 x 1 where there are 16 columns and 1 row
this is a map where it is defined as a constant minimum injection equal to the value of the map multiplied by the value of the conversion..
in our file review of the map is the first map main injection has as a reference in the X-axis
value X pressure =( 2 x eprom ) -100 offset
y value IQ = constant

y and given by the ratio between the eprom x 0,002930

note that the constant injection on the map comes up to the limit rail pressure after, and zero



so it makes it appropriate after the edit limit rail pressure, lengthen the time constant after the pressure limit of the source as you can? note from the annex ? zero

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Originally Written by munro

the damos, however, should say if ? positive, negative, or no...
from the shape of the map according to me...the last curve on the right,the most high of all,it corresponds to the injection time for the bottom press rail and the lower amount? injected....in fact, the time of injection ? very long..***** and in a normal map Tinj where in fact the curve is trovva at the beginning of all the others looking at the map always in 2d..

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From what I think I any curve ? a value of IQ, and the last curve on the right ? the curve with the highest IQ then any curve going from left to right each value ? of a particular the rail pressure that gradually increases...

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Originally Written by Backgroop

Another map to consider this when changing the Rail pressure and the map:
SR - Main inj. ctrl - Minimum main quantity: f(Prail) map 16 x 1 where there are 16 columns and 1 row
this is a map where it is defined as a constant minimum injection equal to the value of the map multiplied by the value of the conversion..
in our file review of the map is the first map main injection has as a reference in the X-axis
value X pressure =( 2 x eprom ) -100 offset
y value IQ = constant

y and given by the ratio between the eprom x 0,002930

note that the constant injection on the map comes up to the limit rail pressure after, and zero



so it makes it appropriate after the edit limit rail pressure, lengthen the time constant after the pressure limit of the source as you can? note from the annex ? zero

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Then pu? depend on not changing this map the not stability? of the rail over 1500 bar? and also by the fact that in the map Main inj we have times of up to 1500 bar, then in the column of the 1700 I have times equal to 0....
So if I make a map from 1600 bar... tends to inject to 0 ms...

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Originally Written by Fede78

Then pu? depend on not changing this map the not stability? of the rail over 1500 bar? and also by the fact that in the map Main inj we have times of up to 1500 bar, then in the column of the 1700 I have times equal to 0....
So if I make a map from 1600 bar... tends to inject to 0 ms...

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Perfect, have to be modified times on the maps over the limit Rail pressure.. I give it for granted mentioned earlier on the back

I tried to do all the mod but I still have the actual pressure with high and low...



I also tried to do the mod to the two bits of the limiter turbo that you said but it goes into recovery and error boost pressure.
The same file with these two bits of gold, but with the bit that you said I the machine should not be in recovery.

Hello Faith I ? strange your situation, limiters press turbo are the ones I tested them as a gi? said about point 75 and 70, for the diesel I would be curious to know what you edit.. post the mod files and ori..

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Originally Written by Backgroop

Hello Faith I ? strange your situation, limiters press turbo are the ones I tested them as a gi? said about point 75 and 70, for the diesel I would be curious to know what you edit.. post the mod files and ori..

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If you do not ? a problem you send it on Skype... I sent you a message with the request.

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Originally Written by Fede78

From what I think I any curve ? a value of IQ, and the last curve on the right ? the curve with the highest IQ then any curve going from left to right each value ? of a particular the rail pressure that gradually increases...

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I simply tell you that to inject, for example, 20mm3 of diesel with 800 bar rail, the injector has to stay open for 100 microseconds(random numbers), if the ecu wants to inject always the 20mm3 of diesel but this one is 1600 bar...the time in which to hold the injector open is not allowed? increase it to remain 100 uS...because obviously the more pressure diesel fuel means more fuel with the same time opening the injector....ergo, the injection time for that amount of fuel to be injected down? 50 microseconds...(always numbers)for a moment prendiad example map with the injection times of a jtd with edc15 and you'll see that for low pressures and iq the time of injection ? long for high pressures and high iq the time of injection, and much more a short time all the engines and common rail systems work in the same way....even if they are managed with electronic made in Eritrea....