Implementation of a Rotary Engine (Wankel Engine) in a
CFD Simulation Tool with Special Emphasis on Combustion
and Flow Phenomena   2015-01-0382  Published 04/14/2015

IMHO This is the best technical paper on the Wankel so far.

Frank Herfert  found it. Thanks Frank.

"In summary, the loss analysis shows that the main losses of the
Wankel engine result from the protracted and retarded combustion.
Consequently, the wall heat losses are lower than expected. "

" The mechanical losses, as well as the gas exchange losses,
are lower than comparable conventional spark ignition reciprocating
engines. The comparison between the investigated Wankel engine and
a normally aspirated, throttle-controlled gasoline engine with port
fuel injection under full load and high revolutions, is illustrated in Figure 37."


"The largest deficits of the Wankel engine can be found in the area of
combustion (implementation loss due to incomplete implementation
of the fuel and combustion loss ) and leakage loss.
The lower wall heat release loss , compared to the
conventional gasoline engine, results from the late and delayed
combustion. The lower mechanical losses and charge exchange
losses arise from the port control and consequently, absence of
the valve train."

What they did not investigate was multiple sparks  on the same spark plugs
or more spark plugs. In effect, unlike a piston engine, the combustion travels past the
spark plugs. In a piston engine the combustion moves away from the spark
plugs some what.

That is where my new high speed CD ignition system comes in to play. It is capable of firing
the plugs six  times.....five  degrees apart at 8000 RPM. Patent is still pending.

It can be tested now, on a dyno, using multiple MSD capacitor discharge ignition systems
fired by a high speed computer 5 degrees apart at 6 to 8K RPM.

I do not have a dyno to test this but I can supply the control computer.
Simon Saba has a rotary engine dyno in northern California.
Please Simon, see if you can get the money to try this.

Paul Lamar

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