Re Propane injectors

[Craig Pugsley]

> >Is there such a thing as an electronically controlled diesel injector?
> >(aka instead of the usual mechanical fuel pump distributor thing..)
> >
> Yes:
> 
> But diesel injection needs around 25,000 psi of fuel pressure, so the
> injector is a plunger piston pump that is operated off a lobe of the cam
> shaft (twice as wide as the one that opens the valves).  The electric
> solenoid is a bypass port that when ON blocks the outlet of the injector
> 'pump' and forces it into the cylinder.  When OFF the flow returns to the
> fuel tank.

Aaah, I see why "EFI diesels" are only recently appearing. Do they
really use 25000 PSI?? I thought it would only be a few hundred PSI.

Craig.