Hybrid fuel injection/ cis and electronic

[Ti Kan]

Robert Hemphill writes:
> In the interest of getting rid of the air flow sensor in cis/cis-e etc.
> fuel injection, could you use a later mass sensor and invented
> electronics to drive the metering piston?
> Would seem you would eliminate a large obstruction and some pressure
> drop
> and increase the flow. Any thoughts?

I don't think there is an air flow obstruction problem with the
sensor plate... if the plate and its bore are wide enough for the
engine's breathing needs, the plate will rise as high as required.
Also, under sudden open throttle conditions the plate actually
overshoots a bit to provide an enrichment.  You can obviously
emulate that in firmware but the mechanical plate works well enough...

The old CIS system is not bad for what it is and works well.  It just
that its "mechanical"-ness doesn't lend enough ways for the fine
software control of all operating parameters, in order to meet
today's high demands for power/torque, fuel efficiency, emissions,
and diagnostics capabilities.

-Ti
01 S4 2.7 biturbo quattro
84 5000S 2.1 turbo
80 4000 2.0
96 A4 2.8 quattro (sold but not forgotten)
-- 
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Research Laboratories, Sunnyvale, CA. USA
  ///    ti at amb.org
 //////  http://www.ibiblio.org/tkan/
///