JPS6030356U

JPS6030356U - Fuel injection pump for internal combustion engines

Info

Publication number: JPS6030356U
Application number: JP12154983U
Authority: JP
Inventors: 健次新宮
Original assignee: ヤンマーディーゼル株式会社
Priority date: 1983-08-03
Filing date: 1983-08-03
Publication date: 1985-03-01

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 the drawing]

第１図は本考案実施例に係る燃料噴射ポンプの１縦断面
図である。２・・・・・・バレル、３・・・・・・プランジャ、４
・・・・・・環状弁、１２・・・・・・環状弁室、１５
・・曲逃油口、１６・・・・・・通油路、２３・・・・
・・燃料排出路、２４・・・・・・リーク油抽出用周溝
、３１・・・・・・燃料加圧室、３２・曲・プランジャ
嵌挿穴。FIG. 1 is a longitudinal sectional view of a fuel injection pump according to an embodiment of the present invention. 2... Barrel, 3... Plunger, 4
...... Annular valve, 12 ...... Annular valve chamber, 15
... Curved oil outlet, 16... Oil passage, 23...
... Fuel discharge path, 24 ... Peripheral groove for extracting leaked oil, 31 ... Fuel pressurization chamber, 32 - Bend - Plunger insertion hole.

Claims

[Scope of utility model registration request]

By reciprocating the plunger 3 in the plunger insertion hole 32 penetrated through the axial center of the barrel 2, oil is supplied through the oil passage 16 formed across the top surface 3a and side surface 3b of the plunger 3. The barrel 2 is moved in the radial direction so that the fuel oil drawn into the fuel pressurizing chamber 31 formed on the plunger top surface 3a side can be pressurized and fed, and the barrel 2 is in communication with the plunger insertion hole 32. An annular valve 4 having an oil escape port 15 is slidable and relatively rotatable on the outside of the plunger 3 in an annular valve chamber 12 formed through the plunger 3 so as to open and close an oil passage 16 of the plunger 3 as appropriate. The annular valve 4 and the plunger 3 are rotated appropriately so that the oil passage 16 of the plunger 3 and the annular valve 4 are connected to each other.
The fuel injection amount is controlled by changing the communication timing with the oil relief port 15, and the fuel injection timing is adjusted by changing the relative position of the annular valve 4 and the plunger 3 in the plunger sliding direction. In the fuel injection pump for an internal combustion engine, the plunger 3 is provided with a lower hole portion 32b located in the plunger insertion hole 32 of the barrel 2 and located closer to the fuel pressurizing chamber than the annular valve chamber 12, and the plunger 3.
The fitting between the annular valve chamber 12 and the fuel pressurizing chamber 31
The fit between the plunger 3 and the upper hole 32a located closer to each other is set to be moderately looser than the fit between the plunger 3 and the upper hole 32a. A fuel injection pump for an internal combustion engine, characterized in that an oil extraction circumferential groove 24 is formed and the circumferential groove 24 is communicated with a fuel discharge passage 23.