pumping losses
The 2-stroke was the great hope of the auto industry,as with a power stroke for each rev,and same pressure above and below pistons,engineers hoped to exploit that tech.,and its high power/weight,and volumetric efficiency.They just couldn't lick emissions issues and everyone has pulled the plug.Honda has a "sparkless" gasoline engine with same BSFC as a diesel and is investigating computer controls to allow operation at low loads where an ignition system is required.------- I've been looking at the Navy's diesel-powered torpedo engine which has only half the "pumping",as a peroxide oxidizer is introduced to the combustion-chamber.There is no intake tract as we understand it in atmo engines.
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