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Author Topic: fine tuning WDKUGDN - what to log for 95% charge?  (Read 7837 times)
elRey
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« on: April 04, 2014, 07:29:27 PM »

When fine tuning WDKUGDN, what should I log to see when 95% charge is reached?

Thanks,
Rey
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titi65
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« Reply #1 on: April 04, 2014, 11:37:09 PM »

I think that:
PressureIntake - ResidualPressureCylinder near= rl;
PressureIntake x Kfpsdsskp(rev/s,pressure) - kfprg(rev/s) nearly= rl;

So, you can log intake pressure and substract to kfprg.
When you find throtle angle witch deliver 0.95 RL, you've got your WDKUGDN .

(I think)
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catbed
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« Reply #2 on: April 08, 2014, 10:15:39 AM »

When I was looking at this, I thought you could not log it as it was calculated. There is no pressure sensor in the manifold to compare pre/post throttle plate pressures.

EDIT: removed variable.

I think to populate WDKUGDN with correct values a pressure sensor in the manifold is needed.

« Last Edit: April 08, 2014, 10:25:10 AM by catbed » Logged
titi65
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« Reply #3 on: April 08, 2014, 10:40:42 AM »

Excuse me, my ME7 got a pressure sensor instead of MAF . . .
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elRey
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« Reply #4 on: April 09, 2014, 06:51:10 AM »

If WDKUGDN is not used in calculating the charge it references, then I don't see why I couldn't just log the calculated charge to tune it, right? If so, what is the variable of the calculated charge?
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userpike
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« Reply #5 on: April 09, 2014, 11:02:11 AM »

The FR says NMOT_W is the source-x for WDKUGDN and shows "wdkugd_w" is the output variable for WDKUGDN.


"This function is part of the normalized target air mass msndkoos_w the target angle wdksgv_w to control the throttle valve
calculated. By the angle for the unthrottled operation wdkugd_w (output from speed-dependent characteristic WDKUGDN in BGMSZS%) is
the target angle defined by the map KFWDKMSN. This is the inverse map of KFMSNWDK (from BGMSZS%) and is on the
built-in throttle valve positioner adjusted. If the above is the normalized target air mass value calculated from KFWDKMSN larger than the
Angle wdkugd_w, so is the condition for unthrottled operation B_ugds = true."
« Last Edit: April 09, 2014, 11:42:06 AM by userpike » Logged
catbed
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« Reply #6 on: April 09, 2014, 11:31:09 AM »

If WDKUGDN is not used in calculating the charge it references, then I don't see why I couldn't just log the calculated charge to tune it, right? If so, what is the variable of the calculated charge?

I believe it is vpsspls_w
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elRey
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« Reply #7 on: April 09, 2014, 03:18:09 PM »

The FR says NMOT_W is the source-x for WDKUGDN and shows "wdkugd_w" is the output variable for WDKUGDN.


"This function is part of the normalized target air mass msndkoos_w the target angle wdksgv_w to control the throttle valve
calculated. By the angle for the unthrottled operation wdkugd_w (output from speed-dependent characteristic WDKUGDN in BGMSZS%) is
the target angle defined by the map KFWDKMSN. This is the inverse map of KFMSNWDK (from BGMSZS%) and is on the
built-in throttle valve positioner adjusted. If the above is the normalized target air mass value calculated from KFWDKMSN larger than the
Angle wdkugd_w, so is the condition for unthrottled operation B_ugds = true."

OK, the question is how do I log/monitor to find out the ideal threshold for B_ugds.

I believe it is vpsspls_w

Thank you. I'll try this.
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catbed
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« Reply #8 on: April 09, 2014, 06:00:13 PM »

Thank you. I'll try this.

Actually I take that back. Try pspvdk_w. FR says it is "quotient: int.manif.pressure divided by pressure upstream of throttle valve"

Also, psspvdkb_w and psspvdk_w
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dream3R
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« Reply #9 on: January 01, 2016, 10:38:28 PM »

Actually I take that back. Try pspvdk_w. FR says it is "quotient: int.manif.pressure divided by pressure upstream of throttle valve"

Also, psspvdkb_w and psspvdk_w

ere's the code I found not complete vars tho, moved one.

seg020:CCAA sub_ACCAA:                              ; CODE XREF: interrupt_sub_B81C+CP
seg020:CCAA                 movbz   r4, mste_wrong
seg020:CCAE                 mov     [-r0], r4
seg020:CCB0                 mov     r12, rlfglmsm_w
seg020:CCB4                 mov     r13, umsrln_w
seg020:CCB8                 mov     r14, #2155h
seg020:CCBC                 calls   4, divide_sub
seg020:CCC0                 mov     r5, [r0+]
seg020:CCC2                 sub     r4, r5
seg020:CCC4                 jmpr    cc_NC, loc_ACCC8
seg020:CCC6                 mov     r4, #0
seg020:CCC8
seg020:CCC8 loc_ACCC8:                              ; CODE XREF: sub_ACCAA+1Aj
seg020:CCC8                 mov     word_302BCE, r4
seg020:CCCC                 mov     r12, #6B62h     ; WDKUGDN
seg020:CCD0                 mov     r13, nmot_word_3019A8
seg020:CCD4                 calls   4, sub_41146
seg020:CCD8                 mov     wdkugd_w, r4
seg020:CCDC                 rets
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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
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