High-pressure pump
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United States of America Patent
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Aug 25, 2015
Grant Date -
Oct 13, 2011
app pub date -
Apr 8, 2011
filing date -
Apr 8, 2010
priority date (Note) -
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Abstract
A high-pressure pump includes a plunger for pressurizing a fuel, a cylinder accommodating the plunger reciprocatably in its axial direction and a pump body. The pump body defines a pressurization chamber, a low-pressure fuel passage hydraulically connecting a fuel inlet and the pressurization chamber, and a discharge passage. The pump body further defines a cylindrical space around the cylinder. The fuel flows into the cylindrical space from the low-pressure fuel passage so as to cool the cylinder. The entire outer surface of the cylinder can be surely cooled.
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