[Diy_efi] engine modeling

[bigblock]

>From: "Tim Drury" <tdrury at siliconmotorsports.com>
>Reply-To: A list for Do-It-Yourself EFI <diy_efi at diy-efi.org>
>To: "'A list for Do-It-Yourself EFI'" <diy_efi at diy-efi.org>
>Subject: RE: [Diy_efi] engine modeling
>Date: Tue, 9 Mar 2004 16:07:11 -0500
>
>
>Alexei - I'm very aware of the inaccuracies between a lab model and
>a real motor :)  The point of the model is to get a running baseline
>from which to begin tuning.
>
>You can also use the various amounts of error to tune the model to
>perform more like the engine under test.
>
>-tim
>
>
> > -----Original Message-----
> > From: diy_efi-bounces at diy-efi.org
> > [mailto:diy_efi-bounces at diy-efi.org] On Behalf Of Alexis PAVLOV
> > Sent: Tuesday, March 09, 2004 10:05 AM
> > To: A list for Do-It-Yourself EFI
> > Subject: Re: [Diy_efi] engine modeling
> >
> >
> > Hi Tim,
> >
> > That's a good idea :-)
> > BUT, I'm afraid once you'll have designed your control algos
> > you'll see that they work poorly on real engines. Because
> > there is a big difference between models and real badly
> > adjusted, badly cooled and unbalanced engines. Especially if
> > you want to modelize base functions like ignition or
> > injection in order to control the engine torque. Of course
> > this approach is very used in research papers and PhD works.
> > But, the science is nothing without the experience. And tests
> > often show some difference between research algos and real
> > observations.
> >
> > I'd rather suggest you doing exhaustive measures on real
> > engines and then applying your control algorithms to these logs.
> >
> > Alexei
> >
> >
> >
> >
> > Tim Drury wrote:
> > >
> > > I skimmed through the archives and haven't seen any mention
> > of anyone
> > > doing any sort of engine modeling via matlab/octave or
> > something else.
> > >
> > > Has anyone done any work on spark-ignition 4-stroke engine modeling
> > > they'd like to share?
> > >
> > > I'm considering building some kind of modular,
> > reconfigurable engine
> > > model to act as a stub against engine control and data acquisition
> > > algorithms.
> > >
> > > Is there sufficient interest on this list to attempt this
> > publicly via
> > > sourceforge or should I just keep to myself :)
> > >
> > > -tim drury
> > >
> > > _______________________________________________
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> >
> >
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> >
>
>
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