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Author Topic: Bosch green 0280155968 calibration  (Read 20958 times)
prj
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« Reply #15 on: July 12, 2013, 12:08:59 PM »

Tuning the car without pressure testing is a waste of time.
If you are sure your TVUB is correct, then rescale axis on FKKVS to allocate more sites to the problem areas.
Remember that input to fkkvs is te, not ti.

You should be able to have sub 2% fuel trims if everything is linearized correctly.
Usually I just do a ton of logging with different loads, and then plot the lambda correction against the FKKVS map as a matrix.
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nubcake
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« Reply #16 on: November 28, 2015, 03:44:34 PM »

Necrobump.

I've been having fun with these lately as well. Firstly, I tried modifying my TVUB according to the spec sheet. Idle STFTs went to ~-25%. That didn't look right (KRKTE is more or less correct), so I went to read around and found out that there are multiple reports about these injectors being highly non-linear. But since they come stock on some ME7-equipped volvos, I decided to just look at stock volvo TVUB first.

One of those volvos is S60R with B5254T4 engine. Its "working" fuel pressure is also 4 bar, which is perfect for my application. Here are stock bins, for example (thanks, guitar24t!) I took the bin from the first post, for AT car, and started looking.

Found TVUB at 0x23790, confirmed by disassembly. Factor for voltage looks funny (0.01 vs 0.0704 for audis), but here's the data:


8V 1.8144
10V 1.2
12V 0.7648
14V 0.4992
16V 0.3808


I used 0.032 as a factor for latency itself, it appears correct for the CPU used.
Also, a good "sanity check" for latency factor is "ms" axis in FKKVS map. It uses the same one and if the axis looks funny - your factor is most likely wrong.

Anyway, FKKVS is at 0x23520. I won't post it here, but it's not THAT non-linear and ranges from -2% to +6% across the board.

EDIT:
These TVUB values along with correct KRKTE (0.07448 for 4.2 V8 engine - this will be different for other displacement and/or cylinder amount!) and completely flat (1.000) FKKVS brought me -1 to -1.5% idle and spot on ( 0 to -0.8 ) cruse LTFTs. Therefore, TVUB for these injectors seems to be completely different from the data circulating around on that spec sheet.
« Last Edit: February 25, 2017, 03:11:02 PM by nubcake » Logged
dream3R
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« Reply #17 on: November 30, 2015, 06:18:18 PM »

Remember the Volvo uses a DECOS fuel system Wink
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How to work out values from an A2L Smiley

http://nefariousmotorsports.com/forum/index.php?topic=5525.msg52371#msg52371


Starting Rev's http://nefariousmotorsports.com/forum/index.php?topic=5397.msg51169#msg51169

noobs read this before asking http://nefariousmotorsports.com/forum/index.php?topic=9014.0title=


ORGORIGINAL 05 5120 creator for Volvo
ORIGINAL Datalogger (Freeware) Author
ORGINAL finder of the 'extra' torque' limits
I don't have ME7.01 A2L I just use ID
antoffka666
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« Reply #18 on: February 17, 2017, 02:03:53 PM »

Hello ! had the same problem with the nozzles, there is already someone who has set them?
values are now! pours gasoline.


« Last Edit: February 17, 2017, 03:02:55 PM by antoffka666 » Logged
mrgabamo
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« Reply #19 on: April 10, 2017, 08:34:09 AM »

I bought those injectors and couldn't find the right specs for them. Right now Im calculating the krkte for 450cc flow, krkte 0.07271 (stock krkte is 0.10301 for 1.8T AUQ 317cc).
I got close to zero on idle trim and ltft, but the numbers keep changing as I run with it, but always stay under -7% and zero for both.
can someone confirm the right flow and tvub for them?
« Last Edit: April 10, 2017, 01:40:49 PM by mrgabamo » Logged
prj
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« Reply #20 on: April 10, 2017, 02:47:04 PM »

These injectors are not linear in response at middle pulsewidths.
They will need quite significant adjustments in fkkvs compared to EV14's, which are super easy.
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mrgabamo
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« Reply #21 on: April 11, 2017, 12:21:09 PM »

These injectors are not linear in response at middle pulsewidths.
They will need quite significant adjustments in fkkvs compared to EV14's, which are super easy.

thank you for your reply!
would the fkkvs be different for each setup (different cars) or just based on the injectors non linearity?
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Lost
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« Reply #22 on: April 11, 2017, 10:32:52 PM »

thank you for your reply!
would the fkkvs be different for each setup (different cars) or just based on the injectors non linearity?


Yes.
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mrgabamo
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« Reply #23 on: April 17, 2017, 08:20:22 AM »


Yes.

can you confirm the right tvub table for them? I managed to get idle and ltft pretty close to zero on e100, but with stock tvub. I couldn't find the right tvub for them.
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mrgabamo
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« Reply #24 on: April 18, 2017, 12:52:28 PM »

could someone please confirm the right tvub for those injectors? need to figure that out first in order to start fixing fkkvs. would be great if someone can tell the right tvub table for them.
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nubcake
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« Reply #25 on: April 18, 2017, 01:09:45 PM »

could someone please confirm the right tvub for those injectors? need to figure that out first in order to start fixing fkkvs. would be great if someone can tell the right tvub table for them.

I think I posted the stock Volvo TVUB for these injectors a few posts ago?
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mrgabamo
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« Reply #26 on: April 18, 2017, 03:57:04 PM »

I think I posted the stock Volvo TVUB for these injectors a few posts ago?

I thought since was told that volvos use a DECOS fuel system and the factor for the tvub was different to the audi one, that those values were wrong for our use. Am I right?
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nubcake
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« Reply #27 on: April 19, 2017, 07:56:15 AM »

I thought since was told that volvos use a DECOS fuel system and the factor for the tvub was different to the audi one, that those values were wrong for our use. Am I right?

No.
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Lost
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« Reply #28 on: April 22, 2017, 02:27:57 PM »

could someone please confirm the right tvub for those injectors? need to figure that out first in order to start fixing fkkvs. would be great if someone can tell the right tvub table for them.


Here you go.
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mrgabamo
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« Reply #29 on: April 26, 2017, 07:54:41 AM »

is this one right? 0280155"8"68 instead of 0280155"9"68? also I read here that those spec sheets are way of. Im sorry if I may sound ironic or complaining, just want to point it out.
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