Mounting arrangement for injection barrel in housing of fuel inj

Details Mounting arrangement for injection barrel in housing of fuel inj Mounting arrangement for injection barrel in housing of fuel inj

1983-02-17

1984-12-18

Smith, Leonard E.

Pumps

Expansible chamber type

Pumping member position controlled port

F04B 704, F04B 3910

Patent

active

044888570

ABSTRACT:
An improved arrangement for mounting an injection barrel in the mounting bore of a fuel injection pump housing and maintaining the integrity of a fluid seal therebetween. A pumping chamber is defined in each injection barrel. Each injection barrel includes a pair of axially spaced annular seats in the external periphery thereof, preferably beyond the axially opposite ends of the pumping chamber. A respective annular seal is seated in each of the respective seats, and when uncompressed, projects radially beyond the barrel periphery. Each mounting bore includes a pair of chamfered surfaces formed at axially spaced locations, each chamfered surface having a respective diameter sufficiently small for compressively engaging a respective seal when the barrel is mounted. The included angle of each of the chamfered surfaces is relatively small to allow axial adjustment of the mounted position of the injection barrel. The diameter of the mounting bore between the surface of the pump housing and the axially innermost chamfered surface of the pair is always greater than the uncompressed diameter of the axially innermost seal to prevent shaving.

REFERENCES:
patent: 2430801 (1947-11-01), Bremser
patent: 2465046 (1949-03-01), Tabb
patent: 3682572 (1972-08-01), Yarger
patent: 3885895 (1975-05-01), Staudt

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