Dynamic seal for fuel injector needle check
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United States of America Patent
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-
Jun 12, 2018
Issued Date -
Oct 20, 2016
app pub date -
Apr 17, 2015
filing date -
Apr 17, 2015
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A fuel injector includes an injector body defining a liquid fuel passage, a gaseous fuel passage, and a first guide bore; a gaseous fuel check guided within the first guide bore between a retracted position and an advanced position to selectively open and block, respectively, fluid communication between the gaseous fuel passage and a gaseous fuel nozzle outlet; and a sleeve seal seated within the first guide bore, the sleeve seal having an inner surface defining a sleeve seal bore therethrough, and at least a portion of the gaseous fuel check is disposed within the sleeve seal bore; an outer surface of the sleeve seal including a first portion and a second portion, the first portion being disposed closer to a longitudinal axis of the sleeve seal bore along a radial direction than the second portion.
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