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After breaking out my old fluid mechanics and physics books it hit me-
The orfice is actually the dampner. Only a finite amount of liquid can rush
through a small orfice, and the volume of the cylinder acts as a buffer,
both from surges and a slight drop in pressure. Whether its neccasary
or not is the next debate- but as it stands it should work to smooth out
both crests and troughs.
OUch. Now look what you done- yall made me think.
Who's going to Bug Jam?????
-rj
>>> "Melissa & Jim" <jadney@vwtype3.org> 11/04/97 08:27pm
>>>
On 4 Nov 97, CHARLES E. HAASE wrote:
> Isn't it called fuel damper?
> But isn't this piece necessary for dampering the fuel surges?
That is what I had always thought, but since it is only a solid steel
box, with no real flex to the sides, it has no real capacity to
absorb pump pulses. Besides, the Bosch fuel pump is a roller pump,
and roller pumps don't create pressure pulses. Good old rubber hose
is pretty good at absorbing pressure pulses, too.
In the end, I am at a loss to explain what was on their minds, unless
there WAS something in there at one time.
Has anyone ever seen one of these on any other D-Jetronix car?
Jim
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Melissa Kepner Jim Adney
Laura Kepner-Adney
jadney@vwtype3.org
Madison, Wisconsin
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