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Thread: Fuel economy measurement across the globe
face picon face BY : email (remove spam text)(Olin Lathrop)

Sean Breheny wrote:
> How does the valve at the end of the tube "know" whether the pump is
> still feeding gas?

It doesn't.  The pump supplies a roughly constant pressure, and the valve at
the nozzle either lets gas thru or it doesn't.  The flow is measure and
accumulated in the pump.  There is a sensor in the nozzle that can tell when
liquid gets to its level and shut the nozzle off to prevent overfilling and

This system makes a lot of sense.  Is it really different in Ireland or is
Tomas just confused?

Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
(978) 742-9014.  Gold level PIC consultants since 2000.
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See also: www.piclist.com/techref/index.htm?key=fuel+economy+measurement
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