"J. Severyn" wrote in message
...

"karl gruber" wrote in message
...

For the most part, only diesel engines have direct injection.

...
But there are a few new gasoline engines that do use direct injection. The
...
It would be nice to see this technology transferred to aero engines as it
looks like it improves fuel economy and gets more power for the same size
engine. Well, don't hold your breath....unless you jump over to
rec.aviation.homebuilt

The fuel economy improvements are seen at lighter loads. At aircraft type
loads (60+%) and at altitude you can't run lean and/or stratified so you
don't gain much economy.

The improvment in power from the increased volumetric effciency and charge
cooling would still apply.


Geoff.