I was thinking about stratified charge by high pressure
air injection as long ago as 1975. I am still waiting
for Mazda or somebody else with the where with all to
try it.

http://www.rotaryeng.net/Strat-charge.html

Paul Lamar ...No rotor no motor.

Paul,
The latest thing is, direct injection through a specially designed spark
plug. As you can imagine there would be more than enough stratified charge
( at the plug face) as the plug ignited and the charge would be leaner as it
progressed to the outer edges, due to natural dissipation over distance and
residual gases in the chamber.

This requires a small compressor to inject air at high pressure into the
combustion chamber after it passes through the fuel injector. The high
compression air enables atomization of the fuel molecules.
I don't think it would take too giant a leap to make the air injection - to
be the total air requirement for selected fuel air mix ratio and for that
mix to be regulated by the computer or manually.
This things are slowly getting to the market place after private and
government developments; as can be seen over the last few years with direct
injection.
George (down under)


Probably close to a billion dollars has been spent by
a succession of Wankel engine developers starting with
Curtis Wright, John Deere, RPI, PATS, Wankel Gmbh and now Mistral
attempting stratified charge with high pressure fuel injection.
Probably over 100 tech papers have been written on the
subject. I probably own and read at least  dozen myself.

http://www.rotaryeng.net/bigbibls.txt

None of them, to my  knowledge, have been successful
in reducing the BSFC below .47. The major problem with high
pressure fuel injection is the cost of the equipment. A second
problem is getting a good mixture inside the combustion chamber.
The air and fuel does not mix well all that rapidly. A third
problem is the flat shallow shape of the combustion chamber
does not lend itself to direct fuel injection... air assisted
or otherwise. I suspect the fuel tends to condense on the face
of the rotor before it can be ignited.

You don't have those problems injecting just high pressure
air directly into the combustion chamber.

What you are describing is the Orbital principle.
Where are you getting your information on applying the Orbital
principle to the rotary engine?

Piston engines are one thing. Wankel rotary engines are totally
something else.

Paul Lamar ...No rotor no motor.

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