JPH0361155U

JPH0361155U -

Info

Publication number: JPH0361155U
Application number: JP12198889U
Authority: JP
Priority date: 1989-10-17
Filing date: 1989-10-17
Publication date: 1991-06-14

Description

[Brief explanation of the drawing]

第１図〜第８図は本考案の実施例を示し、第１
図は第１実施例を示す燃料供給装置の燃料フイル
タのエア抜き装置の概略系統図、第２図は同実施
例を示す燃料フイルタの縦断面図、第３図Ａ，Ｂ
，Ｃは各々３方弁の切り換え状態を示す説明図、
第４図は第２実施例を示す燃料フイルタの要部縦
断面図、第５図は第３実施例を示す第４図相当図
、第６図は第４実施例を示す第４図相当図、第７
図は、愛５実施例を示す第１図相当図、第８図は
第６実施例を示す第４図相当図、第９図は従来技
術を示す燃料フイルタのエア抜き装置の概略系統
斜視図である。Ｅ…デイーゼルエンジン、１…燃料タンク、２
…フイルタ導入路、３…燃料フイルタ、４…３の
一次室、５…３の二次室、６…フイルタ導出路、
７…フイードポンプ、８…燃料噴射ポンプ、９…
８の燃料供給口、１０…８の燃料オーバフロー口
、１１…戻し路、１２…４の上部空間１２、１３
…一次室出口、１４…エア抜き弁、１４Ａ…エア
抜き用三位置三方弁、１４Ｂ…エア抜き用フロー
ト弁、１４Ｃ…エア抜き用電磁弁、１５…３の二
次室出口、１６…Ｅの運転検出手段、Ｐ…一次室
エア抜き位置、Ｑ…燃料供給位置、Ｒ…燃料停止
位置。 1 to 8 show embodiments of the present invention.
The figure is a schematic system diagram of the air bleed device for the fuel filter of the fuel supply device showing the first embodiment, FIG. 2 is a vertical sectional view of the fuel filter showing the same embodiment, and FIGS. 3A and B
, C are explanatory diagrams each showing the switching state of the three-way valve,
FIG. 4 is a vertical sectional view of the main part of a fuel filter showing the second embodiment, FIG. 5 is a view equivalent to FIG. 4 showing the third embodiment, and FIG. 6 is a view equivalent to FIG. 4 showing the fourth embodiment. , 7th
The figures are a diagram equivalent to Figure 1 showing the Ai 5 embodiment, Figure 8 is a diagram equivalent to Figure 4 showing the 6th embodiment, and Figure 9 is a schematic system perspective view of a fuel filter air bleed device showing the prior art. It is. E... Diesel engine, 1... Fuel tank, 2
... Filter introduction path, 3... Fuel filter, 4... Primary chamber of 3, 5... Secondary chamber of 3, 6... Filter outlet path,
7...Feed pump, 8...Fuel injection pump, 9...
8 fuel supply ports, 10...8 fuel overflow ports, 11...return passages, 12...4 upper spaces 12, 13
...Primary chamber outlet, 14...Air bleed valve, 14A...3-position three-way valve for air bleed, 14B...Float valve for air bleed, 14C...Solenoid valve for air bleed, 15...Secondary chamber outlet of 3, 16...E Operation detection means, P...primary chamber air bleed position, Q...fuel supply position, R...fuel stop position.

Claims

[Claims for Utility Model Registration] 1. Fuel is supplied to the fuel tank 1 of the diesel engine E through the filter inlet passage 2, the primary chamber 4 of the fuel filter 3, its secondary chamber 5, the filter outlet passage 6, and the feed pump 7. Air bleed device for a fuel filter of a fuel supply system for a diesel engine configured by communicating with a fuel supply port 9 of an injection pump 8 and communicating a fuel overflow port 10 of the fuel injection pump 8 with a fuel tank 1 via a return path 11. A fuel filter for a fuel supply system for a diesel engine, characterized in that an upper space 12 of a primary chamber 4 of a fuel filter 3 is configured to communicate with a filter outlet passage 6 via a primary chamber outlet 13 and an air bleed valve 14. air bleed device. 2 The air bleed valve 14 is a three-position three-way valve 14A.
The secondary chamber outlet 15 of the fuel filter 3
The air venting three-position three-way valve 14A is provided between the primary chamber air venting position P, the fuel supply position Q, and the fuel stop position R. In the air bleed state operated to the primary chamber air bleed position P, the primary chamber outlet 13 is communicated with the filter outlet path 6, and in the fuel supply state operated to the fuel supply position Q, The next chamber outlet 15 is communicated with the filter outlet path 6, and in the fuel stop state operated to the fuel stop position R, the primary chamber outlet 13, the secondary chamber outlet 15, and the filter outlet path 6 are configured not to communicate with each other. The air bleed device for a fuel filter of a fuel supply system for a diesel engine according to claim 1. 3 The air bleed valve 14 is composed of a float valve 14B and is attached to the primary chamber outlet 13 of the fuel filter 3.
2. The fuel supply system for a diesel engine according to claim 1, wherein the valve is closed by buoyancy when the fuel supply device is filled with fuel, thereby cutting off communication between the primary chamber 4 and the filter outlet path 6. Air bleed device for fuel filter. 4. The air bleed valve 14 is composed of a solenoid valve 14C, and the air bleed solenoid valve 14C is configured to close based on the operation detection operation of the operation detection means 16 of the engine E. 1. An air bleed device for a fuel filter of a fuel supply system for a diesel engine according to item 1.