The AvConsumer wrote:

it's hitting the desired numbers by sampling data from sensors
on the engine, specifically cylinder head and exhaust gas
temperatures."  The system does not use an oxy sensor for
mixture, but keeps the heads and exhaust in range, which
is actually more what we want for engine life.

"During idle, climb or max cruise, it automatically sets each
cylinder's mixture to what amounts to a best-power [mixture]
condition; 75 to 125 degrees rich of peak EGT.  At powers below
75 percent, it reverts to what TCM calls "hill climb mode" [????]
and begins economy leaning to about 50 degrees lean of peak EGT."

". . .CHTs rule.  If they climb beyond limits - specifically 420 F,
variable with engine type, the cylinder gets more fuel for cooling."

charles harbert wrote:

I think one of the biggest advantages of this kind of automatic system is the
increased engine life due to avoided over/under temp (too lean/rich) condition
for the cylinders.  Shock cooling is a real problem which can be very expensive
to fix, and can be very dangerous if the head separates from the cylinder. Fuel
economy should be better than constantly adjusting the mixture (anybody ever
forget to adjust mixture at altitude?). It should be safer because you don't
have to remember to richen during descent. I does sound expensive, but if it
proves reliable and efficient, it will become std equipment for new systems.

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