TVUB scaling

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Topic: TVUB scaling (Read 6713 times)

Lobuziak

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	TVUB scaling « on: April 27, 2012, 05:05:38 AM »

Recently I examined 2 original files from similar engines and similar injectors.(Opel Astra H Z20Ler, Z20Leh)

Injectors properties very similar - only flow difference (from xls file):
0 280 156 021 - Q-stat with 300 kPa (ml/min) - 339 original working fuel pressure of 3.3Bar at fpr - 355cc
0 280 156 280 - Q-stat with 300 kPa (ml/min) - 443 original working fuel pressure of 3.0Bar at fpr - 443cc

It's 25% difference in flow

TVUB table

Code:

Voltage		6.95V	10.01V	11.99V	14.03V	16.00V

0280156021	2.3840	1.1680	0.8400	0.5920	0.4320
0280156280	2.4320	1.2200	0.8920	0.6440	0.4840

Difference	0.048	0.052	0.052	0.052	0.052

So it's not scaled it's shifted by 0.052ms ... pressure is lower but flow has increased

Any hint's why it's like that.

If I would have to scale injectors (3.3Bar to 4Bar fpr) thats 10% of flow, would it work adding 2/5 of 0.052ms to TVUB table?
And of course divide KRKTE by 1.1

Regards
Lobuziak


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aef

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	Re: TVUB scaling « Reply #1 on: February 12, 2014, 11:57:45 PM »

which factor for tvub was used here? and where is tvub located int the old motronic opel files

I would like to use the 0280156280 injectors is my 1.8t.

here is a z20leh from another thread

thank you in advance


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Lobuziak

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	Re: TVUB scaling « Reply #2 on: February 15, 2014, 02:41:10 AM »

In that binary TVUB starts at "A3F22" with factor "0.004" and X-axis starts at "A3F1D" with factor "0,068066"

Code:

Volt = 6.9428	10.0058	11.9797	14.0217	15.9956
TVUB = 2.4320	1.2200	0.8920	0.6440	0.4840

KRKTE for 2L Z20Leh = 0.08

KRKTE for 1.8L will differ

You can calculate TVUB with that polynomial formula for needed Voltage

Code:

=569,09036547467*Volt^0 -424,750155414357*Volt^1 + 137,332021107482*Volt^2 -24,9399550561729*Volt^3 + 2,778767507303*Volt^4 -0,194577979601958*Volt^5 + 0,00836983259422546*Volt^6 -0,000202432911864929*Volt^7 + 0,00000211005726501271*Volt^8

Regards
Lobuziak


« Last Edit: February 15, 2014, 02:46:37 AM by Lobuziak »	Logged

aef

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	Re: TVUB scaling « Reply #3 on: February 15, 2014, 02:56:19 PM »

I am very new to this. Do i have to use the same faktor for tvub in my file or should i copy the values 1:1 ?


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