On Tue, 07 Nov 2006 17:17:23 -0800, Lon <lon.stowell@comcast.net>
wrote:

>High pressure direct cylinder injection appears to be giving a lot of
>the benefits of diesel in gas engines.


It holds a lot of promise because it eliminates fuel being lost during
scanvanging which improves MPG and also allows for higher CR ratios
for a given fuel octane because the injection of fuel into cylinder
just before ignition cools the mixture as fuel vaporizes rahter than
being lost to intake port walls and such and higher CR ratio ment
better power and MPG too. In theory you could run about 13 to 1 CR
with a gas motor with direct injection and 94 octane and get a nice
power and MPG boost too. I look for DI on gas engines to be main
stream by 2010and for diesel to start loosing their luster after that
because the MPG difference will be a lot less and the diesel will
still cost a lot more to buy and fuel. DI will alos make it easier to
supercharge gas motors too.
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