HYDRAULIC TIMER OF FUEL INJECTION PUMP - 株式会社デンソー

Title:

HYDRAULIC TIMER OF FUEL INJECTION PUMP

Document Type and Number:

Japanese Patent JP3467859

Kind Code:

B2

Abstract:

PURPOSE: To move a timer piston smoothly irrespective of differences in coefficient of thermal expansion when a material of a housing differs from that of a cylinder liner in a fuel injection pump of an internal combustion engine.
CONSTITUTION: A cam ring 24 which controls the operation timing of a plunger is connected to a timer piston 60 through a slide pin 58. The timer piston 60 is fitted into a cylinder liner 62 which is press-fitted into a housing 56. The housing 56 and a cylinder liner 62 are press-fitted in press-fitting sections 62-1 at both ends in the axial direction. A first clearance 90 is provided and extended in the longitudinal direction between the cylinder liner 62 and the housing 56 in a section 62-2 between the press-fitting sections. Second clearances 60-1, 60-2 in the radial direction are positioned between the cylinder liner 62 and the timer piston 60 in the press-fitting sections 62-1. Consequently, it is possible to absorb differences in thermal expansion by clearances 90, 60-1, and 60-2.

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Inventors:

Masayuki Abe
Nobuo Kato

Application Number:

JP22494894A

Publication Date:

November 17, 2003

Filing Date:

September 20, 1994

Export Citation:

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Assignee:

株式会社デンソー

International Classes:

F02D1/18; F02M41/14; (IPC1-7): F02D1/18; F02M41/14

Domestic Patent References:

JP6350663A
JP62147047A

Attorney, Agent or Firm:

Takashi Ishida (3 others)

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