<p><br>
On Apr 11, 2011 7:55 PM, "spike" <<a href="mailto:spike66@att.net">spike66@att.net</a>> wrote:<br>
> Actually it depends on how the question is stated. A Diesel engine converts more energy to useful work from a gallon of Diesel fuel than a gasoline engine converts from a gallon of octane, assuming the Diesel is loaded optimally. Octane burning engines are actually more efficient than Diesel when very lightly loaded. This is what has me thinking small turbo-Diesel engines spinning generators at constant speed and load to hold them in their most efficient rev band.</p>
<p>Isn't that the basic principle behind many hybrids?</p>
<p>Use the electric motor for fractional power needs, and run the gas engine at one or a few optimized revs to provide drive power and/or recharge the batteries.</p>