diesel injector break pressure

[Doug Rorem]

on VW diesels, the injectors typically break around 170 bar (~2500 psi)

>>>> >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 |
>>Hey, If you are going to go fast, go REEEAAL FAST.       |
>>


--
Doug Rorem
University of Illinois at Chicago         (312)-996-5439  [voice]
EECS Department  RM 1120                  (312)-413-1065  [fax]
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