Incorrect, the ECU does not anticipate more?, bens? increasing the angle of injection after the TDC. The advance is modified by the ECU according to other logics.Originally Written by diuccio
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Incorrect, the ECU does not anticipate more?, bens? increasing the angle of injection after the TDC. The advance is modified by the ECU according to other logics.
but the angle of injection what is?...
how many degrees of crankshaft rotation are required to have a certain amount? of diesel oil.
To be ir? clear I'll note that if you compare the log of the advance with the original map and the log that you make on a map with only rail pressure is varied, you will observe that the values do not change, will change? the angle of end of injection.
I understood perfectly, but the advance of fuel injection ? precisely how many degrees of rotation until the crankshaft to reach tdc
and the injection takes place tot degrees before tdc.
I wish I could agree with you if I said that the ecu retards the closing of the injector.
I would also like to understand what do you mean by "log"
for "log" means, in layman's terms, when using the diagnosis go to look at the data motor type percentage of accelerator, amount? of diesel injected and so on...I apologize if I do not find appropriate terms at this time...
not c'? the problem, indeed, thanks for the response
I try to respond to the rest, the injection starts tot degrees before tdc (generally, but not always), and then ends (especially when you want everything, or when you remap a) after the tdc. By increasing the injection times of the ecu is limited to keep the injector open time is that it was before, pi? the increase given to the appropriate map. The advance is not decided based on the time of injection.
you are right to adjust the timing advance, the ecu also takes into account the rail pressure, engine load and other secondary parameters type
temperature of the air and fuel.
but the fact remains that, to increase the amount? of diesel oil you have to hold the injector open longer (to equal? rail pressure)
and, therefore, the ecu must anticipate.
and then that means "usually, but not always" are you referring to the case of the pre-injections and post-injections?
The fact that the ecu has to anticipate I assure you that is not ? cos?, give it a try, increases the time of 300us to see how much you vary the advance... not replace them? at all.
"generally, but not always," why? low rpm and low flow of diesel fuel thanks to pre injections, you can inject even after the tdc, with benefits especially to ****l motor? and reduction of NOx. To us, this thing affects relatively few, but if you look at some of the original maps you will notice that in the points indicated by me have an advance on the negative - the beginning of the injection after the tdc.
Now back on topic; if you want to talk about it yet, you can open a topic and it will be? happy to add my opinions.
ok, but in which section should I open this type of topic?
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