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Old 12-22-2008, 06:33 AM   #1
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Default Good news - MS2 closed loop boost control

I just grabbed this from msextra.com:

> wes kiser wrote:
>My project will be running again soon, (plus a friends project is now to the >point we want to test some things) and I have a few questions:
>
>1) Boost control PID- I remember back when I stopped paying attention, >there was discussion about changing the PID math to make this easier to >tune. Has this been done yet in any of the betas? If not, should it still be >theoretically possible to tune the loop with what is currently in the code? I >get this is "use at your own risk" stuff, I can let off the gas pedal or set the >overboost cut conservative.
>
>
>I've redone the math. It should be in the next beta (to be released in the >next couple of days.

Hope this one works out good - so I can be driving closed loop boost control in the spring, when my car will be back on the road...

I thought this would be interesting for some of you (maybe the MS1 closed loop gets a workover too)

Greets
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Old 12-22-2008, 07:25 AM   #2
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It is (MS1) Keithg is redoing the closed loop idle to use a proper PID algorithm first and then he's gonna do the boost control.

I said I'd test the idle for him just waiting on a release to do it
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Old 12-22-2008, 02:00 PM   #3
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Sweeeeeeeeeeeeeeeeeeeet!

EDIT: Sweet assuming they do it for the MS-I.

Last edited by ZX-Tex; 12-22-2008 at 04:13 PM.
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Old 12-22-2008, 02:15 PM   #4
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needs more MS-I support....maybe i should venture into MS-II....
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Old 12-22-2008, 03:09 PM   #5
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They get it right and a few people say it works, and I'll try it.
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Old 12-30-2008, 11:49 AM   #6
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And here we go:

MSx/Extra EFI • View topic - MS2/Extra Beta 2.1.0 20081229

Won't be able to test this until April, so maybe there is some experiences then...

Greets
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Old 12-30-2008, 12:00 PM   #7
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Appears to be MS2 only? If so I'll wait and see before I make the dive into MS2.
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Old 12-31-2008, 08:47 AM   #8
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currently testing Keiths work on PID control for Idle on MS1, only P and I are coded so far, but it looks good



If this works as planed the PID controls are going to be ported to boost and EGO control.
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Old 12-31-2008, 09:26 AM   #9
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Anyone got an idea what the constants for P,I and D for the boost control might be like for us (I know, that this is different for every car, but maybe someine can explain, what a good starting oint could be and how to tune for optimum?)
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