TCC info

[John Lamb]

Bob,
Have you had a chance figure out the control algorithm relationship with
the VE tables being used in a non-speed-density mode on a MAF sensor PCM
(such as a 95 LT1, 8051 PCM).  I would have thought that the VE only
came into to play during speed-density mode. However, that seems not to
be the case. I have never seen this explained. Any clues?
JL

rr wrote:
> 
> It is a matter of going through the code and figuring
> out what it does. When it doesn't make sense I fire up
> the test bench. This lets me watch what it is doing.
> 
> As I go through code it gets easier each time. When I
> was first working with it, it was tough.
> 
> I've come to the conclusion that even having all of the
> tables doesn't allow for tuning them. You really need to
> know how the code behind them works.
> 
> BobR.
> 
> On Fri, 7 Sep 2001 11:00:12 -0700
>  "Darrell N." <darrelln at datalog.ab.ca> wrote:
> >
> > > A writeup on the basics of TCC operation has found its
> > > way to the gmecm papers site (thanks Steve):
> > >
> > > http://www.diy-efi.org/gmecm/papers/
> >
> > Excellent stuff, Bob.  I've read this and most of your
> > other papers, and
> > they provide some great info and insights into the
> > operation of the ECM.
> > How do you figure all this stuff out, anyway?  Either you
> > used to work
> > for GM, you have a secret stash of reference material
> > that nobody else
> > knows about, or you have a prodigious brain and lots of
> > spare time.
> > (probably the latter ;)  Regardless, keep 'em coming...
> > If you are taking
> > requests, I'd like to see something on the theory behind
> > the BLM and
> > Integrator functions.
> >
> > regards
> > darrell n
> > Darrell Norquay
> > Datalog Technology Inc.
> > Voice: (403) 243-2220
> > Fax:   (403) 243-2872
> > Email: darrelln at datalog.ab.ca
> > Web:   www.datalog.ab.ca
> > ----------------------------------------------------------------------------
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