Pumps – Expansible chamber type – Biasing means effects induction stroke of abutment driven,...
Patent
1998-06-24
1999-11-16
Doerrler, William
Pumps
Expansible chamber type
Biasing means effects induction stroke of abutment driven,...
92153, F04B 1900, F01B 3110
Patent
active
059846500
ABSTRACT:
A pressure fuel pump device for use with an internal combustion engine comprises a pump body which has therein first and second chambers which are aligned and merged A cylinder member is installed in the pump body. A plunger is reciprocatively movably disposed in the cylinder member to define in the cylinder member a pump chamber which is connected to both a fuel supply pump and fuel injectors through respective fuel passages. The plunger has one end exposed to the first chamber. A drive shaft is adapted to be rotated about its axis by an external power means. A rotation cam is provided on the drive shaft to rotate therewith. The end of the plunger is arranged to be pushed by the rotation cam upon rotation of the rotation cam. A bearing is disposed in the second chamber to rotatably support the drive shaft relative to the pump body. An oil intake passage is provided for feeding the first and second chambers with a lubricating oil, and an oil discharge passage is provided for discharging the lubricating oil from the first and second chambers.
REFERENCES:
patent: 2166857 (1939-07-01), Bugatti
patent: 3186349 (1965-06-01), Compton et al.
patent: 5775203 (1998-07-01), Osborn et al.
Hori Toshiaki
Okubo Yoshio
Doerrler William
Unisia Jecs Corporation
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