JPS5840560U - Pressure boosting unit injector - Google Patents
Pressure boosting unit injectorInfo
- Publication number
- JPS5840560U JPS5840560U JP13420981U JP13420981U JPS5840560U JP S5840560 U JPS5840560 U JP S5840560U JP 13420981 U JP13420981 U JP 13420981U JP 13420981 U JP13420981 U JP 13420981U JP S5840560 U JPS5840560 U JP S5840560U
- Authority
- JP
- Japan
- Prior art keywords
- piston chamber
- servo piston
- pressure
- metering
- unit injector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Fuel-Injection Apparatus (AREA)
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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図、第２図は従来例を示す断面図、第３図は本考案
に得る増圧式ユニットインジェクタの実施例を示す断面
図、第４図、第５図は要部の作用説明図である。
１はサーボピストン室、２はロータリバルブ、−４は増
圧ピストン、５は戻しばね、７は増圧室、８はノズル、
１３はメータリング回路、１４’。
１５は逆止弁、１７はポペット弁、１９は漏れ通路、２
０は漏れ孔。Figures 1 and 2 are cross-sectional views showing a conventional example, Figure 3 is a cross-sectional view showing an embodiment of the pressure boosting unit injector obtained in the present invention, and Figures 4 and 5 are operational explanatory diagrams of main parts. be. 1 is a servo piston chamber, 2 is a rotary valve, -4 is a pressure increase piston, 5 is a return spring, 7 is a pressure increase chamber, 8 is a nozzle,
13 is a metering circuit, 14'. 15 is a check valve, 17 is a poppet valve, 19 is a leak passage, 2
0 is a leak hole.
Claims (1)
ン室１と、このサーボピ゛′ストン室１に嵌合され、か
つサーボピストン室１内に供給される高圧燃料の押圧力
にて作動し、また戻しばね５にてメータリング動作する
増圧ピストン４と、サーボピストン室１とメータリング
回路１３を介して連通し、上記増圧ピストン４のメータ
リング動作時にこのメータリング回路１３により燃料が
流入してメータリングされる増圧室７とよりなり、上記
サーボピストン室１と増圧室７とを連通ずるメータリン
グ回路１３のサーボピストン室１側端部に、サーボピス
トン室１内の圧力がピストン作動圧になったときに閉と
なる常開の第１逆止弁１４′を、またメータリング回路
１３の増圧室７側端部に、増圧室７内の圧力が燃料噴射
圧になったときに閉となる常開の第２逆止弁１５をそれ
ぞれ介装した増圧式ユニットインジェクタにおいて、上
記第１逆止弁１４′をポペット弁１１と、これが当接す
る弁座とで構成し、弁座の近傍に、漏れ通路１９を開口
し、またポペット弁１７に、これの閉状態のときにメー
タリング回路１３と上記漏れ通路１９とを連通ずる漏れ
孔２０を設けたことを特徴とする増圧式ユニットインジ
ェクタ。The servo piston chamber 1 is connected to the supply port of the rotary valve 2, and the servo piston chamber 1 is fitted into the servo piston chamber 1 and is operated by the pressing force of high pressure fuel supplied into the servo piston chamber 1. The pressure booster piston 4 which performs a metering operation at 5 communicates with the servo piston chamber 1 via a metering circuit 13, and when the pressure booster piston 4 performs a metering operation, fuel flows through this metering circuit 13 and the metering is performed. The pressure in the servo piston chamber 1 is connected to the servo piston chamber 1 side end of the metering circuit 13 which communicates the servo piston chamber 1 and the pressure increase chamber 7. The normally open first check valve 14', which closes when In the pressure boosting unit injector, each of which is provided with a normally open second check valve 15 that is closed when A pressure increasing type, characterized in that a leak passage 19 is opened near the poppet valve 17, and a leak hole 20 is provided in the poppet valve 17 to communicate the metering circuit 13 and the leak passage 19 when the poppet valve 17 is in the closed state. unit injector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13420981U JPS5840560U (en) | 1981-09-11 | 1981-09-11 | Pressure boosting unit injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13420981U JPS5840560U (en) | 1981-09-11 | 1981-09-11 | Pressure boosting unit injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5840560U true JPS5840560U (en) | 1983-03-17 |
Family
ID=29927642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13420981U Pending JPS5840560U (en) | 1981-09-11 | 1981-09-11 | Pressure boosting unit injector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5840560U (en) |
-
1981
- 1981-09-11 JP JP13420981U patent/JPS5840560U/en active Pending
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