Injection nozzle
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United States of America Patent
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Dec 30, 2014
Issued Date -
N/A
app pub date -
Mar 15, 2011
filing date -
Mar 22, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
An injection nozzle comprising a nozzle body provided with a bore within which a valve needle is moveable, the valve needle being engageable with a valve seating to control fuel delivery through a set of nozzle outlets, said nozzle outlets including respective entry openings defined in a wall of a sac volume of the nozzle body, wherein the valve needle includes a first valve region, a second valve region and a seat region defined by a transition between the first and second valve regions which seats against the valve seating when the nozzle is in a non-injecting state. The valve needle comprises a third valve region adjacent the second valve region, the third valve region having an outer surface defining a curved profile, the end of the outer surface terminating substantially in alignment with the entry openings when the valve needle is engaged with the valve seating.
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