Direct Injection - Stratified

[Gary Derian]

Any time a device that restricts flow is introduced into the path of air and
fuel, power is reduced.  A pre-chamber is such a device and such an engine
will lose efficiency compared to an open chamber design.

As long as an engine runs lean enough to use all the available fuel, leaner
is only useful to reduce pumping losses, which does improve economy, but
leaner is not the only way to reduce pumping losses.

Gary Derian <gderian at oh.verio.com>

snip
> Try some out of box thinking.  The propaganda is that Stratified Charge is
to
> facilitate burning an overall lean mixture thereby increasing milage.
snip
> , think about using two fuels.  The first - thru the prechamber, is an
easy to
> ignite, relatively fast burning fuel that will generate a nice flame jet
and
> readily ignite the main chamber.
snip