High-pressure fuel pump unit for in-cylinder injecting type engi

Details High-pressure fuel pump unit for in-cylinder injecting type engi High-pressure fuel pump unit for in-cylinder injecting type engi

1998-09-23

2000-10-24

Kamen, Noah P.

Pumps

Expansible chamber type

Having pulsation dampening fluid receiving space

123447, F04B 1100, F02M 700

Patent

active

061357340

ABSTRACT:
The high-pressure fuel pump unit for an in-cylinder injecting type engine of the invention comprises high-pressure fuel pump 3 which has a casing 40 having a sucking path and a discharge path, a cylinder 41 provided in the casing 40 and having a sliding hole 41a, a fuel pressurizing chamber 45 formed on a part of the sliding hole 41a, and a plunger 43 arranged reciprocally movably in the sliding hole 41a, sucks the fuel from the sucking path into the fuel pressurizing chamber 45 through reciprocation of the plunger 43, and discharges the pressurized fuel from the discharge path, and pressure-feeds the same to a fuel injector 1 of an in-cylinder injecting type engine; a damper 30 which is provided integrally with the high-pressure fuel pump 3 and absorbs pulsation of the fuel pressure caused by the high-pressure fuel pump 3 in the low-pressure fuel path; and an accumulator 70 which is provided integrally with the high-pressure fuel pump 3 and absorbs pulsation of pressure of the fuel discharged by the high-pressure fuel pump 3.

REFERENCES:
patent: 4142497 (1979-03-01), Long
patent: 4459959 (1984-07-01), Terada et al.
patent: 4615320 (1986-10-01), Fehrenbach et al.
patent: 4649884 (1987-03-01), Tuckey
patent: 4884545 (1989-12-01), Mathis

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