Re Propane injectors

[David Doddek]

>> >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.
>
>
Yes, the pressure is that high.  Some times it can get as high as 35000.

David J. Doddek                                          |pantera at pobox.com
Owner SGD Electronics & Development Engr for Caterpillar |h 309 685-7965
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