| 摘要 |
A simple, piston ported, two stroke engine having low weight, small size, low fuel consumption, enhanced power output and reduced exhaust emissions. A rotary exhaust valve adjacent to the cylinder exhaust ports closes the exhaust at completion of cylinder blowdown and as the cylinder inlet ports open. A crankcase pump forces fresh, cold, dense air plus fuel mixture into the cylinder via the cylinder inlet ports. Thus, the cylinder exhausting process is separate from the cylinder filling process and no air plus fuel mixture flows out the exhaust. Also, to ensure reliable ignition every cycle, a uniquely contoured top surface on the piston concentrates and delivers compressed, dense, air plus fuel mixture to the ignitor in the combustion chamber.
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