Pumps – Expansible chamber type – Pumping member position controlled port
Patent
1989-04-11
1991-03-19
Smith, Leonard E.
Pumps
Expansible chamber type
Pumping member position controlled port
417494, 123449, 123509, F02M 3900
Patent
active
050006681
ABSTRACT:
In a distribution-type fuel injection pump, a fuel supply passageway, through which a feed pump and a fuel pressurizing chamber communicate with each other, is isolated from a cam chamber and bypasses the same. In order to simplify the construction, the fuel supply passageway is formed in a peripheral wall portion of a housing. On the other hand, a cam mechanism comprises a spring assembly including at least one spring, first and second annular spring seats and an engaging member. The first spring seat has an annular base section and an extension extending from a peripheral edge of the base section toward the second spring seat. The engaging member is fixedly mounted to a forward end of the extension. Prior to incorporation the spring assembly into a hollow body of the housing, the spring assembly is in a state in which the peripheral edge of the second spring seat is engaged with the engaging member under elastic force of the spring. After the spring assembly has been incorporated into the body through an opening at one end thereof, bolts are employed to fixedly mount the head to the body against the spring to close the opening of the body.
REFERENCES:
patent: 4546749 (1985-10-01), Igashira et al.
patent: 4697565 (1987-10-01), Kobayashi et al.
patent: 4763611 (1988-08-01), Kobayashi et al.
patent: 4793314 (1988-12-01), Yoshinaga et al.
Hirakawa Toshiro
Kubo Ken'ichi
Nakamura Hisashi
Diesel Kiki Co. Ltd.
Savio, III John A.
Smith Leonard E.
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