Re Propane injectors
David Doddek
pantera at pobox.com
Tue Sep 10 01:34:52 GMT 1996
>> >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
Formula SAE Team Sidewinder 94-95 |w 309 578-2931
89 T-bird SC, 69 Fairlane w/SGD EFI |fx 217 428-4686
74 Pantera w/Electromotive Tec-II Twin turbos and Nitros |
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