JPS58134665U

JPS58134665U - distribution type fuel injection pump

Info

Publication number: JPS58134665U
Application number: JP3154082U
Authority: JP
Inventors: 窪田　耕治; 健次新宮
Original assignee: ヤンマーディーゼル株式会社
Priority date: 1982-03-04
Filing date: 1982-03-04
Publication date: 1983-09-10
Also published as: JPS6140938Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案実施例に係る分配型燃料噴射ポンプの縦
断面図、第２図は第１図の■−■縦断面図、第３図は第
２図の■−■横断面図、第４図は第１図のＩＶ−ＴＶ矢
視図である。１・・・ポンプケーシング、２・・・プランジャ、２ａ
・・・プ″ランジャの頂面、２ｂ・・・プランジャの側
周面、′３・・・環状弁、４・・・分配ロータ、４ａ・
・・分配ロータの内周面、１１・・・カム軸、１４・・
・燃料室、１５・・・燃料加圧室、１８・・・プランジ
ャ嵌挿穴、３８・・・通油孔、４０・・・逃油孔、４３
・・・分配ロータ嵌装部、４３ａ・・・分配ロータ嵌装
部の外周面、５５・・・分配溝、５６・・・主高圧油通
路、５９．６２．６５゜６８・・・分配通油路。FIG. 1 is a vertical cross-sectional view of a distribution type fuel injection pump according to an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view taken along ■-■ of FIG. 1, and FIG. 3 is a cross-sectional view taken along ■-■ of FIG. FIG. 4 is a view taken along the IV-TV arrow in FIG. 1. 1... Pump casing, 2... Plunger, 2a
... Plunger top surface, 2b... Side peripheral surface of plunger, '3... Annular valve, 4... Distribution rotor, 4a...
...Inner peripheral surface of distribution rotor, 11...Camshaft, 14...
・Fuel chamber, 15... Fuel pressurization chamber, 18... Plunger insertion hole, 38... Oil passage hole, 40... Oil escape hole, 43
...Distribution rotor fitting part, 43a...Outer peripheral surface of distribution rotor fitting part, 55...Distribution groove, 56...Main high pressure oil passage, 59.62.65°68...Distribution passage Oil road.

Claims

[Scope of utility model registration request]

Plunger insertion hole 18 formed in pump casing 1
Each time the plunger 2 is reciprocated within the plunger 2, the fuel in the fuel pressurizing chamber 15 formed on the top surface 2a of the plunger 2 can be pumped out.
Inside the fuel chamber 14 formed in the middle part, the plunger 2 has a top surface 2a and a side peripheral surface 2b on the outside of the plunger 2.
An annular valve 3 that can open and close an oil passage hole 38 formed astride the plunger 2 is fitted so as to be rotatable and slidable relative to the plunger 2, and the annular valve 3 is rotated appropriately relative to the plunger 2. The fuel injection amount can be controlled by moving the annular valve 3 in the plunger axial direction to change the opening and closing timing of the oil passage hole 38 of the plunger 2, and the fuel injection timing can be controlled by displacing the annular valve 3 in the axial direction of the plunger. , furthermore, the outer peripheral surface 43a of the pump casing 1 is placed at a suitable location.
Appropriate number of distribution oil passages 59°62 are arranged at equal intervals in the circumferential direction on the top.
．． A distribution rotor fitting part 43 is formed in which one end of the main high pressure oil passage 56 communicating with the fuel pressurizing chamber 15 is opened in sequence, and one end of the main high pressure oil passage 56 communicating with the fuel pressurizing chamber 15 is opened. On the outside, the distribution rotor fitting part 43
By being rotated relative to the main high pressure oil passage 56, the fuel pressurizing chamber 15 and each of the distribution oil passages 59°62, 65, 68 are sequentially and selectively communicated with each other. A cylindrical distribution rotor 4 having a distribution groove 55 formed on its inner circumferential surface 4a is coaxially fitted to the distribution rotor fitting portion 43 so as to be relatively rotatable, and the distribution rotor 4 is The force for reciprocating the plunger 2! , a distribution type fuel injection pump characterized in that it can be rotated synchronously with a shaft 11.