Good news - MS2 closed loop boost control
#1
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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
> 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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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
I said I'd test the idle for him just waiting on a release to do it
![](https://www.miataturbo.net/images/smilies/smile.gif)
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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
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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currently testing Keiths work on PID control for Idle on MS1, only P and I are coded so far, but it looks good ![](https://www.miataturbo.net/images/smilies/smile.gif)
![](http://www.asbi52.dsl.pipex.com/images/CLIdle.jpg)
If this works as planed the PID controls are going to be ported to boost and EGO control.
![](https://www.miataturbo.net/images/smilies/smile.gif)
![](http://www.asbi52.dsl.pipex.com/images/CLIdle.jpg)
If this works as planed the PID controls are going to be ported to boost and EGO control.
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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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