JPS6373571U

JPS6373571U -

Info

Publication number: JPS6373571U
Application number: JP16882986U
Authority: JP
Priority date: 1986-10-31
Filing date: 1986-10-31
Publication date: 1988-05-17

Description

[Brief explanation of drawings]

第１図は、この考案に係る燃料噴射ポンプの一
部破載断面図、第２図、第３図、第４図、第５図
及び第６図は、この考案に係る燃料噴射ポンプの
作動特性を説明するための一連の要部拡大断面図
、第７図及び第８図は、この考案に係る燃料噴射
ポンプと従来のものについて、燃料噴射量特性及
び送油率特性をそれぞれ示すグラフ、第９図、第
１０図及び第１１図は、低負荷域及び高負荷域に
おける、リークポートと燃料吸排孔の円周方向の
位置関係を説明するための上平面図、また第１２
図、第１３図及び第１４図は、従来の燃料噴射ポ
ンプの作動特性を説明するための一連の要部拡大
断面図である。２……プランジヤバレル、２ａ……燃料吸排孔
、３……プランジヤ、２３……リリーフ通路、２
４……リークポート、２５……リード。 FIG. 1 is a partially exploded sectional view of the fuel injection pump according to this invention, and FIGS. 2, 3, 4, 5, and 6 show the operation of the fuel injection pump according to this invention. A series of enlarged sectional views of main parts for explaining the characteristics, FIGS. 7 and 8 are graphs showing the fuel injection amount characteristics and the oil delivery rate characteristics, respectively, for the fuel injection pump according to this invention and the conventional one, 9, 10, and 11 are top plan views for explaining the circumferential positional relationship between the leak port and the fuel intake/discharge hole in the low load region and the high load region, and FIG.
13 and 14 are a series of enlarged sectional views of main parts for explaining the operating characteristics of a conventional fuel injection pump. 2...Plunger barrel, 2a...Fuel intake and exhaust hole, 3...Plunger, 23...Relief passage, 2
4...Leak port, 25...Lead.

Claims

[Scope of utility model registration request]

a cylindrical plunger having a spiral groove on its outer diameter and a relief passage bored from its upper end face in its axial center, which communicates with the spiral groove;
A hollow cylindrical plunger barrel having a fuel intake/exhaust hole on the side surface, and the plunger injects fuel by sliding in the axial direction within the plunger barrel, and also rotates about the axis. In the in-line fuel injection pump, the plunger has a relief passage which has a smaller cross-sectional area than the fuel intake/discharge hole and communicates with the spiral groove at the beginning of the effective stroke of the plunger. A row-type fuel injection pump characterized by being provided with a leak port that communicates with the fuel supply/discharge hole.