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

[Mark Mansur]

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

M

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