Subject: 2 cycle injectors
From: Rotary Engine
Date: 8/8/2008, 11:49 AM
To: AAA Put this in the To box

I just had a brilliant idea.
with the flip of a switch you fire the injectors every other
rev instead of once per rev. In effect this doubles the dynamic
range of the injectors. You set them up to put out plenty of fuel
at max RPM max HP one pulse per rev. If too rich on the low end you flip the
switch and halve the fuel delivery by firing the injectors every other rev.
Then you readjust the leaning knob for just the right amount of fuel. This
is real simple and easy to do with a single chip  counter or flip flop. It
could be done automatically at say some mid range RPM.

BTW this analog EFI system I am working on has a built in
limp home mode. If one of the injectors on one of
the rotors goes down you richen the other one up as we have too
injectors per rotor with two leaning knobs. This is mainly done to
compensate for a difference in VE on each rotor. The feedback to you
comes from the EGT.

Each one of four injectors has its own PC board about 1.4 inches wide by 2.4
inches long. Each PC board injector controller has its own power supply. A
normal EFI system has but one supply so if that supply goes down the whole
system goes down. Not so with this new simple analog system. Each injector
system is stand alone with lots of redundancy.

Paul Lamar

Are you talking about pairing two injectors in the same port and
alternating which one fires per rev to reduce the effect of injector
"dead time"?

-Chris

No. I am firing either every rev or every other rev.
the rotary really does not care when you fire the injectors as one of the
three rotor faces is open to the intake port at all times.

Paul Lamar
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