Direct Injection

[Gary Derian]

With port injection, the best atomization is letting the fuel puddle on the
back of the valve then hitting it with a blast of exhaust when the intake
valve opens.  On SEFI when does the fuel inject?  Isn't it when the intake
valve is closed?  Maybe someone here has actual data.  Remember, the
cylinder pressure exceeds the intake pressure when the intake valve opens.

Gary Derian <gderian at oh.verio.com>
>
> > I am aware of Orbital's work.  Their system is a great way to make a 2
> > stroke meet emission requirements.  The air assisted injection is
necessary
> > to achieve fuel air mixing in a limited time since injection occurs
after
> > the exhaust port is closed.
>
> You mean intake port?  It is necessary to obtain acheive the mixing in the
short
> period of time, a plus is the good atomization.
>