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The Doyle Rotary is a split cycle rotary piston engine that utilizes two rows of inward facing
pistons.
One row of pistons is for intake and compression.
The other row is for power and exhaust.
As you can see, displacement is achieved without any reciprocating mass.
The cylinder block, pistons, and outer housing revolve around the stationery crankshaft in
a smooth continuous motion.
Top dead center of the pistons occurs when the outer housing is closest to the cylinder
block.
Bottom dead center occurs when the outer housing is furthest from the cylinder block.
As the engine spins, the cylinders pass across ports that are housed within the stationery
crankshaft.
The timing of these ports establishes the four strokes of the Doyle Cycle.
Within the crankshaft there is a single intake port through which fresh air enters the engine.
At the end of the compression stroke the compressed air travels into the combustion chamber.
Within the combustion chamber fuel is injected and a spark plug ignites the fuel.
The rapidly expanding gases are introduced to the second row of pistons resulting in
the power stroke.
After bottom dead center the exhaust gases exit the engine through the exhaust port.