Map Alfa 147 1.9 JTDm 120 hp

Kess v2 clone

Only 1 time a write lock a few days ago nn I connected the power supply to the pc recovery by turning off and turning on the ignition and restarted the programming

I would like to make a reflection on the times of injection, then we consider 1000 bar, and we see the times for 10 -20 -40 -80 mm3
we have:
10mm3 = 422us
20mm3 = 545us
40mm3 = 792us
80mm3 = 1277us

now, it seems to me that the proprorzioni coming back, because in theory, if I leave the injector open the double : enter the double of the fuel, so we perform this calculation by taking as a reference the 10mm3
Then
10mm3 = 422 us
20mm3 = 844 us
40mm3 = 1688 us
80mm3 = 3376 us

I would say that we did not own

Now, the injectors, they put something like 300 us for being open, let's apply this rule to the 10mm3

10mm3 = 422us-300 us opening = 122 us
20mm3 = 244+300 = 544us
40mm3 = 488+250 = 738us
80mm3 = 976+300 = 1276us

I would say that back much more as a discourse, and then saying that to 100mm3 I have to add 25% ? wrong, but I sotrarre to the value 80mm3 300us and then calculate from there, the 25%, then riaggiugere 300 us

I would be glad to discuss this thing because you can make errors of no small account not calculating these things

facts calculations on the various pressures is a value oscillating between 230 and 300 us the time it takes for l?injector to open the needle

to open the needle, the injector employs a pressure difference between the two ends? of the same,the same rail pressure. Pesno that the opening time depends also from the

In fact, varies from 220 to 300 us in growing in the p-rail

then, I calculated for the whole scale used in the opening times of delos the needle, increases as the pressure decreases, this is because unlike the old injector, the injector common rqail should not win the pressure from the rail, but is facilitated by it, when it comes to the pressure on the injector is distributed in 2 rooms, one on top of the pin and one below, the 2 pressures cancel out, and the needle remains in the balance closed by the mere force of the spring, when we give the command to the solenoid of the upper part, where c'? the rail pressure is emptied and the lower part, where c'? always the rail pressure with the same pressure controls the opening of the injector, then + pressure = + fast opening

here is the jpg attachment with the scale of the rebuilt up to 100mm3 from 10mm3, many of the values reported 3000 at low presisone are not right, I on my map I have them all ricorretti

therefore, to calculate the apertuda to 100mm3 the formula ? ((T10-Ti)x10)+Ti, where T10 ? the opening time 10mm3, and You ? the opening time of the needle to the rail pressure choice

then by the classical proportion 82mm3+25% in reality, we increased the injection times of 31% and we would have injected a quantity of 106mm3 instead of 100, then a 6% and more, of course not, you die, but if you want to place a map to ok, I don't think it is an error to negligible

here's the table, it is for the injectors 120 and 150 bhp 1.9 jtd jtdm, 1.6, and 2.0 have pulverizers different then the rule does not apply

Thanks tidus. Very helpful. Can I ask you if ? the result of your studies, I've got some source?

the fruit of my studies, increasing by 25% under the advice of a user on the forum, I realized that the map time is not followed a linear increments, just watch it in 2d to see that you are not ? a straight line but a curve, you want that the values are not step by step the same, but also trying to mettereli on step same the value does not return, try with exel to insert the values into oprdone of 10mm3 and make a chart, I did, and then I squeezed, then reading a message from another user a little more on that in speaking of the opening time of the injector for me ? coupling a bullet in the head: not ? in the map ? cosniderato also the time of the opening of the needle? they must have done to have a map in less to manage, and then with my felicta I found the values for which removing them from the time all of the proportions of the maps tronano, made with the exel sheet to mo dif toto following the formula that you created after the various tests for each pressure, having consciousness after the first 4 steps of the rail that increase the pressure I had to try a value lower than the previous one, and so I created this sheet that I am glad to share with you

attention, doesn't it ? only the result of the delay of the opening of the needle, but essentially to those pressures, the pressure losses increase exponentially.