High-pressure fuel pump

Details High-pressure fuel pump High-pressure fuel pump

2007-05-09

2011-12-06

Kramer, Devon C (Department: 3746)

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

C417S454000, C123S446000

Reexamination Certificate

active

08070462

ABSTRACT:
A high-pressure fuel pump is disclosed that includes a pump housing with a suction port hole for defining a suction port, a pressure chamber for sucking fuel from the suction port, and a delivery port hole for defining a delivery port delivering fuel pressurized in the pressure chamber. The fuel pump also includes a plunger for pressurizing fuel sucked in the pressure chamber due to reciprocal motion of the plunger. Furthermore, the fuel pump includes a relief valve provided in the suction port hole, wherein the relief valve opens when a delivery pressure of the fuel delivered from the delivery port exceeds a predetermined pressure, thereby reducing the delivery pressure of the fuel.

REFERENCES:
patent: 5370096 (1994-12-01), Cooke
patent: 5715798 (1998-02-01), Bacon et al.
patent: 6135090 (2000-10-01), Kawachi et al.
patent: 6554590 (2003-04-01), Maeda et al.
patent: 2003/0219346 (2003-11-01), Abe et al.
patent: 2003-247474 (2003-09-01), None
patent: 2003-343395 (2003-12-01), None
patent: 2004-138062 (2004-05-01), None
patent: 2004-218547 (2004-08-01), None

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