Hello, as title say i have question if anyone changed this variable.
Found out that AIMV in me7.2 is 24161074 but i have no idea why this number is so high. Also i have to put my number of pulses which is 468 for 17" 215/40/17 wheel in bmw e30
Where are you getting these numbers? If you got them from a binary then it sounds like you're using the wrong XDF file.
Last edited by MotorMouth93; 06-17-2019 at 04:47 PM.
aimv.PNG
According to the data sheet FNRAD is the pulse between wheel rotation translated to speed so the two items most likely will require editing in tandem IMO I attached the pages from the function sheet that outline the two items
AIMV is calibration pulses
fnrad1.png
fnrad2.png
Last edited by zarboz; 06-19-2019 at 11:17 PM.
I like to pretend I know stuff
the OLS I have for this DME also shows that crazy value for AimV
I think the OLS shows this in the wrong spot if you look at both Damos files it shows the Aimv as a value equaling 2670.0000134 or 0X19B7914
I like to pretend I know stuff
what I am saying is the OLS is wrong the damos is probably right
most the time it is the other way around I will see what I can figure out for you on this maybe because i am curious as well
my mph is about 3-4 miles off and its annoying
I like to pretend I know stuff
Oh thanks lets figure it out
You could adjust 4-5mph by FNRAD, aftermarket wheel size ?
-edit-
Found something about AIMV but in ME9 ecu:
Screenshot_20190622-164349_Chrome.jpgScreenshot_20190622-164341_Chrome.jpg
Last edited by Kisu1337; 06-22-2019 at 10:49 AM.
still don't get it ... see attachement above ME9, they factor it and still shows some huge numbers T_T
@bump
Anyone ?
The motronic receives the signal conditioned by the trip computer with 4 impulses per revolution transmission wheel.
This approx. complies to a frequency of 1 Hz per km/h. (Exact adjustment is performed by means of data; see
signal conditioning AIMV).
In the 10 ms grid a raw speed VROH is conditioned from the time difference between the two latest time entries
delta-T = [ t(n-1) - t(n)], to which the fixed value AIMV is subject to:
vroh w [km/h] = constant / AIMV [Imp./km] / delta-T [s]
This value vroh w is limited into positive and negative direction by the change limitation DVFZBEG and
stored in the RAM-cell vfzroh w.
If delta-T becomes greater than 1 s, then vroh w is set to 0.
With V > 0, vfzroh w is valid after 2 V-impulses.
In the hold phase (KL 15 off) a V-acquisition is no longer performed, the V-value acquired last is preserved.
For FGR-function vfzroh w is smoothed by a PT1-filter. The vehicle acceleration is calculated from the filtered speed
signal.
so AIMV is a part of a math equation and appears to be just a dividing factor
read the screenshots I attached it breaks down the function and how it works
- - - Updated - - -
ALSO please refer to the FNRAD posting I have shared.... it is the calculated vehicle speed against wheel pulse
I asked on cartechnology but why do you want to change AIMV and who told you to start looking there?
I am curious what your end goal is
I know you said you had an m62tu in a e30 i wanna say
I like to pretend I know stuff
Or maybe use math from your screen shot
if hptuner shows @ 38,721 for 19152120
then
38,721 / 19152120 = 0.002021760515285
so X * 0.002021760515285 is your factor
(if you want your output to match the way HP tuners seems to show it)
I could have my maths backwords but I gave it a shot
I like to pretend I know stuff
DSC converts signal received from wheel magnetic ring Then sends square wave to ECU which sends to Instrument Cluster or being used in Cruise Control etc... I want to use it in e30 in which ABS output signal from sensor in rear axle shaft is square wave but with different frequency, i want to adapt my ecu to that signal
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