Pressure Common Rail

[gionag]

hi,
I'm slamming the muzzle on the pressure of the common rail on a alfa 147 8v 115hp (my :D )...

I saw that map stocks, to the maximum reaches to 1350bar... from what I read, the pressure should not be above the 1420bar (+5%)...
by placing, for example, an IQ to be injected to 90mm3, as riscalereste the last bp ?

trying to put in relation the pressure CR / duration and soi it seems to me pretty obvious that the rail pressure (to ensure the injections are complete, without breaking the 10? post-PMS, and without advances too aggressiv)should be rather altine from 2000 rpm on...

I would do such a thing, at low rpm do not increase, so it's not inietter? never the IQ in those rides to the other limiters.

8186

express yourself freely ;)

[francescosparco]

I usually increase by 35 of the load 1500 rpm.. my with a 6 % nn mi from failure

[gionag]

I usually increase by 35 of the load 1500 rpm.. my with a 6 % nn mi from failure

then spalmi increases also in IQ ir? low... honestly, I can not find the utility?... this? provided you do not modify the AFR of the stock, I believe that that in map st? pi? at the bottom is gi? right...
not s? if my ? a reasoning that makes sense...

however, 6% from 1500rpm up... I see what comes out

[francescosparco]

okkk ;) let me know

[jack91]

Set to 1450 bar me from failure

[gionag]

At 90% you d? failure why? you have not raised the limiters and/or the single value limiter
on 332_536/688 are *72A6A and *72A78 8-bit factor 1

[fil89n]

The eye with the rail pressure.. On some cr2 to raise it just leads to shutdowns and problems..I ? 15 days that I throw in the head...

[jack91]

The limiters I raised the bit no xk nn dv I knew they were.. anyway the map of the 147 115 hp and a little different from that of the punto jtd 80cv, in the sense that I am one of 14500

[fil89n]

Honestly, I don't understand why? dash you so much to increase the rail pressure..
we put random numbers and simple: put that you are now at 100% load to inject 70mm2 of diesel, and that at that range and load match 1350bar in the rail.
if I take your rail pressure from 1350 to 2700, holding duration, inietteresti 105 mm3 of fuel.

Bringing this report to an increase of +7% instead of +100% of earnings(as well as many tummy aches) to raise the rail? 3 mm3 of fuel maybe..

Has that to do with cognition of cause you should rescale all the maps that have an axis with the rail pressure, the scale of the map your sensor rail pressure, rescale the map to a duty cycle of the rail. Always hoping that the reading of the sensor rail remains reliable.. Find the SVRL, and the maps of limitation. And on some CR2 to be careful that the combination of duration, lift + pressure raised you can? lead to errors under pressure why? the injector you download too much pressure by the flute(because the duration increased), and does not arrive to the goal.
From the practical point of view, so far, the only thing that I have noticed about raising the rail pressure ? a greater responsiveness to the accelerator, obtainable for? even with a pi? a simple modification to the driver wish, that will imply minor changes..

I did not put the benefits the fact that raising the rail pressure decreases, the particles emitted, why? I doubt that here is interest to someone, the pollution factor..

[gionag]

I think that the scenario is even worse as the scope ? function ? the square root of the pressure (if I remember correctly)...

[fil89n]

also I remember stuff like that, but I didn't remember the precise function but I remembered you had to :D
the result ? the same, there smadonniamo so much behind to a map, that at the end of the practical has no special effects.. Indeed, it seems that increasing the pressure lowers the PM thanks to the increase of EGT, then strive the impeller and that's all..

[gionag]

also I remember stuff like that, but I didn't remember the precise function but I remembered you had to :D
the result ? the same, there smadonniamo so much behind to a map, that at the end of the practical has no special effects.. Indeed, it seems that increasing the pressure lowers the PM thanks to the increase of EGT, then strive the impeller and that's all..

almost want to do a test, I put back ori the map of the pressures and see what happens. :D I will keep you updated

[fil89n]

I have noticed a minor reattivit? in the openings fast and a little less vibration and noise..
Then I went on the driver's wish, I gave him a +2% from 50% to 70%, from 1500 to 3500,and my car is practically the same as delivery..

[biondo83]

Increase the pressure in the rail ? the final touch, we can obtain good performance even with rail the original.
In many discussions, if any ? talked about and many will be able to give you confirmation.

[polini]

if you increase the quantity? fuel injected ? should also help to burn... then it all depends on what you want to achieve

[matteo23]

Normally I do not touch the Rail pressure for the high pressure pump.. but if you want to make a complete map in all, I think that it is from the tap, within certain limits, of course, you should then move the limiter of the rail pressure..

[oakley1]

I repeat......for changes to our ****llo I don't touch.....? already high of his..... but only if c'? the shortage of fuel to the injectors

[jack91]

My point with map rail is made to 1430 makes me recovery

[oakley1]

That material conveyor belt?

[jack91]

The point 2 series 1.9 jtd

[oakley1]

You have adequate both limiters rail?

[jack91]

I found sl one to tell you the truth, nn find the other

[pititec]

If you have not yet solved, here's an example of 2 limiters rail pressure. hello

[jack91]

Know, until today I found a solution..

[salvatoreragonese]

Without touching the limiters c and a can also increase minimally to these pressures?