Autotune for boost control

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Tomba
Posts:27
Joined:Sun Jan 25, 2015 4:20 pm
Autotune for boost control

Post by Tomba » Wed Nov 11, 2015 10:49 am

Dear All,

Could or is there a feature to "Autotune" the BOOST-PWM value used once the PID regulation of the boost control is active during a steady state point? The reason why I ask this is that I will go to the dyno soon to adjust an engine. Since there is already much to look out for (EGT, KNOCK, ...) it would be nice to just control

- AFR (set AFR so EGT will be limited to a certain maximum value)
- check power output or knock with the ignition map.

Once an operation point has been adjusted correctly in terms of AFR/MAX EGT value and ignition/power output you would be able to just set the VE value and copy/set the PWM of the current used boost value to the MAP.

This way you could just sweep through the engine speed range at certain loads and copy/paste the correct values.
It might look lazy but I think a valuable amount of time can be saved when doing such.

Maybe other members have a different approach, your comments are welcome of course!

Best regards,
Tomba

ihiryu
Posts:237
Joined:Thu Sep 17, 2015 12:10 am

Re: Autotune for boost control

Post by ihiryu » Wed Nov 11, 2015 7:10 pm

Leave it in open loop on the dyno. Once you get it dialed on everything else, then go back to open loop.

When using megasquirt (my main ECU that I use), I can do closed loop in about 30 minutes on the street with someone else driving.

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