[Gmecm] Auto-tune algorithm for real-time tuning programs

[Sjödin Robert]

Mark, have you had a look at VEphd by Craig and Alvin? Their program =
adjusts individual cells of the VE tables based on both BLM and INT. =
Input is csv-log by eg Datamaster.

I've found VEphd together with a smoothing program really useful. What =
is missing is a nice user interface. I was told Craig named it VEphd =
because you need a PhD to be able to run it :) Anyway, they provide the =
source code so perhaps you could use some of that?

I've also tried VE master and it is a good program. But I think VEphd =
will tweak your VE tables a little better but requires more work. =
Someone out there who has tried both programs? I've only tried both on =
one car so it would be nice to see if someone else have come to the same =
conclusion.

Rob





-----Original Message-----
From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On =
Behalf Of Mark Mansur
Sent: den 27 augusti 2005 01:12
To: List relating to GM OEM ECMs
Subject: Re: [Gmecm] Auto-tune algorithm for real-time tuning programs


I sure have. The next version of TunerPro has the first step implemented =
-=20
that of correlating ALDL data with editor data. Realtime auto-tuning=20
(there's a good pun there, eh?) is another logical step of evolution. =
Look=20
for it soon.

M

----- Original Message -----=20
From: "William Lucke" <william.lucke at highspeedlink.net>
To: <gmecm at diy-efi.org>
Sent: Friday, August 26, 2005 4:07 PM
Subject: [Gmecm] Auto-tune algorithm for real-time tuning programs


> The latest generation of AEM EMS's have an "autotune" feature that=20
> allows
> the computer to dial in its own fuel map based on the readings of a =
wide=20
> band O2 sensor.
>
> The only portion of that algorithm that is not currently available for =

> DIY
> tuning of GM computers is a feedback loop linking BLM's to VE table=20
> values. This still has to be done manually. I wouldn't think it would =
be=20
> terribly difficult to add that algorithm to a real-time tuning suite =
like=20
> TunerPro RT or TunerCAT RT. The software could look at the datastream =
and=20
> after the BLM value in a given cell has stabilized, would modify the=20
> corresponding VE table entries to reflect the value of that BLM cell. =
I=20
> know that each BLM cell accounts for multiple VE cells, so some =
smoothing=20
> and conditioning and interpolation would be involved, but the problem =
is=20
> pretty simple computationally.
>
> That way, you just drive around with an emulator in your computer and=20
> a
> laptop in your passenger seat and the fuel map basically dials itself =
in=20
> as the BLM's change. It will still require tuning of the spark table =
and=20
> final manual adjustments/smoothing to the VE tables, but it would save =
a=20
> whole lot of time and effort.
>
> Has anyone else been thinking of this?
>
>
> Will
>
>
> --
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8/26/2005
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>=20
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