Fuel pump for a direct injection system with a better hydraulic sealing of the intake valve
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United States of America Patent
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Jan 2, 2018
Issued Date -
N/A
app pub date -
Apr 27, 2016
filing date -
Apr 28, 2015
priority date (Note) -
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Abstract
A fuel pump for a direct injection system having: a pumping chamber; a piston, which is mounted in a sliding manner on the inside of the pumping chamber; an intake channel, which originates from a wall of the pumping chamber and has a housing portion; an intake valve, which is inserted into the housing portion of the intake channel; and a locking ring nut with an annular shape, which is threaded and is screwed into the housing portion of the intake channel so as to strike against the intake valve; the housing portion has an annular abutment, which reduces the diameter of the housing portion and against which the intake valve strikes; the locking ring nut is screwed into the housing portion with a tightening force that is sufficient to determine a plastic deformation of the annular abutment against the intake valve.
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