High pressure fuel pump having improved lubrication characteristics
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United States of America Patent
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Dec 1, 2015
Grant Date -
Mar 6, 2014
app pub date -
Dec 6, 2012
filing date -
Sep 5, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A high pressure fuel pump with improved lubrication characteristics includes a plunger configured to pressurize fuel supplied to a high pressure chamber formed within a housing at a high pressure to discharge the fuel while being lifted and dropped in the high pressure chamber within the housing, a tappet body configured to support a lower end of the plunger, a cam configured to lift and drop the plunger while rotating, and a roller configured to be installed in a roller shoe pressed in a lower portion of the tappet body and rotate in a state of being in contact with the cam, the fuel supplied to the high pressure chamber passes the roller shoe through at least one lubrication passage and is supplied to a contact area between the roller and the cam or a contact area between the roller shoe and the roller.
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