fuzzy logic controllers

[Jay Wallace]

Hi, all

I was reading an article about fuzzy logic controllers (C. von
Altrock in Nov 97 Circuit Cellar Ink) in automobiles for things
like  ASS (antiskid steering), ABS, HVAC, automatic transmission
and engine control . In the article he made a couple of provocative
statements such as: "...no mathematical model describing complete
behavior of an engine exists [referring to linear programming and
PID]. Most engine controllers use a look-up table ...(that
is)...generated from the results of extensive testing and
experience. The generation of such a look-up table, however, is
suitable for 3 dimensions (2 input and 1 output). [his words, not
mine] Also, the generation and interpretation of such tables is
difficult and considered a black art.

"Although fuzzy logic can replace these look-up tables, most
manufacturers will not publish any details on fuzzy logic engine
control... (since)...the rules of the fuzzy logic system make the
entire engine control knowledge of the company completely transparent."

He makes some other points about look-up table sizes and
computational speed but, ultimately, comes to the final conclusion
that "the future is fuzzy". Forgetting the hype for a moment (he
owns or works for a fuzzy logic company - see www.fuzzytech.com)
are the points that he is making valid? Is there a aftermarket
fuzzy ecu other than the turbo blow off controllers? Anybody got
any more insight - or references / places to start?

In a similar vein, are "learning" or "self tuning" controllers
currently found in commercial automotive systems? 

Thanks for any help,
Jay