Title: Fuel injection pump

Abstract: In a fuel injection pump having two kinds of plungers rotatably displaced by a common rack, each of one kind of plungers ceasing fuel supply and each of the other kind of plungers supplying fuel during idling of an engine, a measuring screw-like groove of each plunger ceasing fuel supply during idling of the engine has a longitudinal groove communicating with a plunger pump chamber. The longitudinal groove is of relatively enlarged width, and a cut portion crossing at a right angle to said longitudinal groove is provided at the intersection of the longitudinal groove and the upper edge of the screw-like groove. The depth of this cut portion increases toward the longitudinal groove.

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Inventors: Yajima, Kenichi (Kawagoe, JA)

Application Number: 463722
Filing Date: 1974-04-24
Publication_date: 1976-08-17
Assignee: Diesel Kiki Kabushiki Kaisha (Tokyo, JA)
Primary Class(es): 123/339.29 123/198F, 123/449, 123/495, 417/494
Other Classes:
US Patent Ref:

1706785	Mar, 1929	Junkers	123/139.
2565681	Aug, 1951	Fleck et al.	417/494.
2890657	Jun, 1959	May et al.	417/494.
3438327	Apr, 1969	Thompson	417/494.
3567346	Mar, 1971	Meekes et al.	239/533.
3741685	Jun, 1973	Simko	123/139.

Other Refs: 1,164,392499,87150,88659,938171,126

Oct, 1958	FR
May, 1930	DD
, 1972	JA.
Oct, 1944	NL
Nov, 1934	CH

Primary Examiner: Myhre, Charles J.
Assistant Examiner: Devinsky, Paul
Attorney: Larson, Taylor & Hinds