Re: New Audi A6 2.7T 6 speed in the garage

[ti@amb.org (Ti Kan)]

Orin Eman writes:
> > > When I used to do instrumentation and electronic consulting for Toyota
> > > Racing Development, I heard plenty of (old wives?) tales about people
> > > that decided to cut off fuel when the engine was braking and paid for it
> > > with burned pistons.
> 
> > Happens on the MB engine.  Part of the high output enrichment comes from
> > a fuel frequency valve input.  Close the throttle at full chat and the
> > engine goes lean _very_ suddenly.  If the ECU is badly chipped (voltage
> 
> The MC also has a decel valve which bypasses the air metering plate
> allowing it to drop all the way.
> 
> Later MCs also have a dashpot on the throttle which stops
> the throttle slamming shut and may well prevent the rapid leaning.

All the latest Audi engines have drive-by-wire throttle, so this is
all ECU controlled now...  No need for mechanical kludges like dashpots
when it can all be done electronically.

-Ti
96 A4 2.8 quattro
84 5000S 2.1 turbo
80 4000 2.0
-- 
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Research Laboratories, Sunnyvale, CA. USA
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