Diesel engine efficiency is also enhanced by the fact that they run
unthrottled. At less than full load, a homogeneous charge engine (like all
gasoline engines, even so called Honda stratified charge) has increased
pumping losses relative to a diesel because of the throttle plate.

The Wankel engine might have slightly better part load performance than a
gasoline engine due to the lack of a throttle. At RPI, we worked with a
derivative of that engine and with turbocharging and fuel system improvements
we were able to get bsfc's in the .45 range.

Jon Lauter
Rotary Power Marine Corporation
www.rotarymarine.com

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