[s-cars] Fuzz logic vs adaptive learning

[FvAMI at aol.com]

In a message dated 1/25/04 4:39:05 PM Pacific Standard Time, 
mik at info.fundp.ac.be writes:


> Kirby,
> 
> The Motronic uses a 10x16 points boost map, as well as a 10x16 points WGFV 
> duty cycle map. The boost values are "target values" and the FV duty cycles 
> are set to reach the desired boost levels with a given WG spring tension.
> 
> Programming the Motronic for top feed control sounds easy enough to me as 
> long as a WGFV (or sort of) is still there, it's a matter of about one hour 
> of real-time tuning with my on-line emulator plugged into the ECU. Let me 
> know if you feel like experimenting this spring :-))))
> 
> HTH,
> 
> Mihnea
> 

You would need to have a Normally Open solenoid to do this. 

The other option I once thought of was to use the stock solenoid invert the 
signal to the solenoid and/or connect the V+ to GND and confirm the Motronics 
had the ability to continuous source the current to the solenoid (It sinks the 
current) ... the only problem is the solenoid would be active for 99% of the 
time and you would substantially decrease the life of the solenoid ... in 
addition the Motronics unit would be sourcing in excess of 1 amp to the solenoid 
almost continuously.

The older Audis may have a normally open solenoid. Personally I felt it would 
be better to do an analysis first on exactly the response time of the 
standard system. Some more aggressive boost programming may be able to compensate for 
the response time ... i.e. program the Motronics unit to be at 80% - 90% 
maximum boost at lower throttle settings.

Best regards,
Feico van der Laan