Re: [Amc-list] AMC V8 Diesel--Did AMC ever create one?

[Ken Ames <ameskg@xxxxxxxxx>]

I'm thinkin' he's thinkin' of gasoline injected engines.

Ken 


Quoting Sandwich Maker <adh@xxxxxxxxxxxxxxxxx>:

> " From: "Jim Blair" <carnuck@xxxxxxxxxxx>
> " 
> " A: Why are the injectors screwed into the intake and not the head then?
> 
> on a diesel?!?  since the fuel is ignited by the compression of the
> air in the cylinder, how do they avoid premature ignition if it's
> injected through the intake valve during the intake stroke?  and it
> would make the phrase 'injection timing' meaningless.
> 
> i'm assuming the valve isn't cracked open near tdc for the injection,
> also incidentally venting compression pressure into the intake.
> 
> i don't see any way this could work.  you have to inject the fuel near
> tdc on the compression stroke, when the valves are closed.
> 
> the only indirect injection i've ever heard of uses a prechamber in
> the cylinder head that the injector and glow plug [if any] project
> into.
> 
> it's possible that the geometry of the head and packaging factors
> could have the injector mounted on the intake, but it'd still have
> to inject into the cylinder or a prechamber, not the port.
> 
> " From: adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)
> " 
> " " From: "Jim Blair" <carnuck@xxxxxxxxxxx>
> " "
> " " It's called indirect injection and quite few older engines worked that
> way,
> " " including the IH 7.3L used in Fords and the Nissan 3.3 in Jeep trucks.
> " 
> " indirect injection does not work through the intake port.  it is true
> " that many truck and all sub-truck diesels are or were idi; i forgot to
> " add that in addition to scaling down, they're also generally more
> " rpm-flexible than direct injection, though computer control is erasing
> " that.
> ________________________________________________________________________
> Andrew Hay                                  the genius nature
> internet rambler                            is to see what all have seen
> adh@xxxxxxxxxxxxxxxxx                       and think what none thought
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