Hello all, I have this question for many will seem obvious but for me it is....
I read that if I increase the values for IQ therefore I will have an increase of the turbo pressure due to the greater amount of exhaust gas, it is true, so what?
It seems plausible as a thing, and if it was true I have to consider and calculate the increase in turbo pressure in function of what?
Quoteoftheday
hello,I'm sorry, which are the values iq?
an increase in diesel fuel is injected leads to an increase of pressioine due to the increase of the exhaust gas.so automatically recalculated everything.........
sportraxxx the iq is the amount of fuel injected at each cycle.
It depends on whether the management of the turbo is happening in closed or open loop.
In the first case, the ecu tries to maintain the set pressure value in the map.
In the second case is set to a value in the map of the VGT independent of pressure but dependent on the IQ and the rpm.
Usually the map VGT is calibrated up to a certain IQ.
The transition from open loop to closed is managed by some of the curves with hysteresis that mark the transition from one management to another
thank you Frank...
there is a glossary where you can read all these acronyms ...some are known..some others not
like, for example, closed-loop and open......
thanks
Thank you all guys finally I made a bit of clarity
In the case of edc15 vag, which I'm studying to start with, you speak of open or closed loop? as I can understand it to regulate me and not do damage?
Still grazieeee!
this thing is more noticeable with cars equipped with fixed geometry turbine...Originally Written by MrcBtr93
Hello all, I have this question for many will seem obvious but for me it is....
I read that if I increase the values for IQ therefore I will have an increase of the turbo pressure due to the greater amount of exhaust gas, it is true, so what?
It seems plausible as a thing, and if it was true I have to consider and calculate the increase in turbo pressure in function of what?
Quoteoftheday
if, instead, the mountain of the vgt, the ecu still managed not to "piccare" too much pressure to the turbo..
then it depends on case to case
A rider does not create queues even in the car...
a automoblista create queues even on a motorcycle...
The transition from open loop to closed loop is handled by the ecu and, I believe, is always present.Thank you all guys finally I made a bit of clarity
In the case of edc15 vag, which I'm studying to start with, you speak of open or closed loop? as I can understand it to regulate me and not do damage?
Still grazieeee!
The open loop is used to manage a sort of effect of an overboost, the map that refers to this management is the map that to output the percentage of the valve and the input has the IQ and Rpm. One of the pressiione has the same input but of course that is output from the pressure-aim to maintain
I don't know how to say thank you, you were really fantastic Munro and Sportraxxx!
*Franco75: you mean maybe N75 duty cycle? many thanks also to you..
unfortunately I am a beginner like you....
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