Monday, July 29, 2013

5:16 AM

How it Works: If you're familiar with the way an oil pump works, you're already one step closer to understanding the Doyle rotary engine. Architecturally, it consists of two concentric circles; the center section is static and contains the intake, fuel-injection system, single combustion chamber and single spark plug. Around this center section are two rows of radial piston bores; one row of bores handles the intake and compression while the other handles the expansion and exhaust. The pistons and their connecting rods are mounted eccentrically to the housing, which is a high-strength steel "barrel" that's offset to the center of the entire assembly.

Complicated? A little, but in motion it makes a lot more sense. The barrel, pistons and piston bores all rotate together, but since the barrel and chamber are offset, the pistons make one stroke per revolution. Intake air passes through the stationary center, past apex seals swiped from the Mazda Renesis rotary engine and into the compression chamber. When that piston reaches the correct angle, it releases the compressed air into the combustion chamber where fuel is added and ignited. The hot gas then passes through to the other row of bores where it expands, driving the power pistons, and then is exhausted.

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