[Diy_efi] timeframe to get equal fuel distribution

[Bevan Weiss]

I'm not following...
If it's DI (direct injection) that means that the injector is actually
situated in the wall of the combustion chamber.  That means that when the
fuel mixture inside the cylinder goes pop (which is the point of the engine)
then it will cause a very large increase in cylinder pressure.  This
pressure will be exerted on every single surface inside the chamber,
including the injector.  Hence no matter how many cycles/strokes the engine
makes, at one stage it will explode some fuel to cause a pressure (after all
it's the pressure that actually does the mechanical work, basic engine
theory).
The more work you want the engine to do the greater must be the peak
pressure (for the same engine design).
Now that also means that the injector will be subject to that same peak
combustion temperature, hence if it can't stand the heat (as well as the
pressure) then it will be no good for the application and you wouldn't have
direct injection for long.

I'm not even too sure whether you're talking about direct injection as it is
known, or whether you're talking more about a form of manifold injection
where the injector is situated just behind the intake valve and squirts fuel
into the chamber when the intake valve is open.  This isn't the Direct
Injection that everyone else is talking about.

----- Original Message -----
From: "joeld" <joeld at ualberta.ca>
To: <diy_efi at diy-efi.org>
Sent: Sunday, March 16, 2003 7:07 PM
Subject: RE: [Diy_efi] timeframe to get equal fuel distribution


> These injectors have been designed for this application. They will not
melt.
> They will not have to endure high pressures at all. 2 stroke pressure is
> entirely different from 4 stroke. If the injectors are placed correctly,
they
> can easilly be held in by the fuel rail only
>
> We have looked extensively into all the DI systems, more than the average
> person has access to. With our budjet, none are feasable to be adapted to
> other engines.
>
> This will work and has been done before, I just wanted some creative input
>
> Joel Day
> C.S.C 2003 Project Coordinator
> ph: 434 9294
> C.S.C Team Website: www.ualberta.ca/~uacsc
>
>
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> http://www.diy-efi.org/mailman/listinfo/diy_efi
>

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