Catalytic coating to prevent carbon deposits on gasoline direct injector tips
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United States of America Patent
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May 19, 2015
Grant Date -
Feb 28, 2013
app pub date -
Aug 30, 2011
filing date -
Aug 30, 2011
priority date (Note) -
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Abstract
A fuel injector (10) has an inlet (12), an outlet (14), and a passageway (16) providing a fuel flow conduit from the inlet to the outlet. A valve structure (22, 24) is movable in the passageway between first and second positions. A seat (26) is provided at the outlet and has at least one seat passage (28) in communication with the passageway. Movement of the valve structure between the first and second positions controls the flow of fuel through the seat passages. The seat includes an outer tip surface (30) through which the least one seat passage extends. A catalytic coating (32) is provided on at least a portion of the outer tip surface. The coating causes oxidation of fuel on the coating to occur at a temperature lower than if the coating was not provided.
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