JPS59159779U - Internal combustion engine fuel injection system - Google Patents
Internal combustion engine fuel injection systemInfo
- Publication number
- JPS59159779U JPS59159779U JP5350283U JP5350283U JPS59159779U JP S59159779 U JPS59159779 U JP S59159779U JP 5350283 U JP5350283 U JP 5350283U JP 5350283 U JP5350283 U JP 5350283U JP S59159779 U JPS59159779 U JP S59159779U
- Authority
- JP
- Japan
- Prior art keywords
- plunger
- pressure
- pump chamber
- fuel
- valve
- 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)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来装置の一例を示す縦断面図、第２図及び第
３図は夫々本考案の一実施例を示す縦断面図である。
１１・・・・・・ユニットインジェクタ、１２・・・・
・・プランジャ、１３・・・・・・サーボピストン、１
４・・・・・・ニードルバルブ、１４ａ、１４Ｃ・・・
・・・ガイド部、２１・・・・・・大径シリンダ、２２
・・・・・・小径シリンダ、２３・・・・・・サーボ圧
力室、２４・・・・・・サーボ作用室、２５・・・・・
・リターンスプリング、２９・・・・・・ポンプ室、４
０・・・・・・三方電磁切換弁、４１・・・・・・制御
回路、５２・・・・・・噴口、６１・・・・・・燃料逃
し通路、６２・・・・・・燃料逃し溝、６３・・・・・
・背圧室、７１ａ、７１Ｃ・・・・・・環状溝、７１ｂ
、７１ｄ・・・・・・逃し通路。FIG. 1 is a vertical cross-sectional view showing an example of a conventional device, and FIGS. 2 and 3 are vertical cross-sectional views each showing an embodiment of the present invention. 11... Unit injector, 12...
... Plunger, 13 ... Servo piston, 1
4...Needle valve, 14a, 14C...
... Guide part, 21 ... Large diameter cylinder, 22
...Small diameter cylinder, 23 ... Servo pressure chamber, 24 ... Servo action chamber, 25 ...
・Return spring, 29...Pump chamber, 4
0...Three-way electromagnetic switching valve, 41...Control circuit, 52...Nozzle port, 61...Fuel relief passage, 62...Fuel Relief groove, 63...
・Back pressure chamber, 71a, 71C... annular groove, 71b
, 71d... Escape passage.
Claims (1)
るプランジャと、該プランジャに摺動自由に一部重合し
かつ前記ポンプ室に連通ずる噴口を該ポンプ室の圧力に
応動して開閉弁するニードルバルブと、前記プランジャ
を往復動せしめる゛と共にその往復ストローク量を機関
運転状態に応じて制御するサーボピストン装置と、前記
プランジャの噴射終了所定ストローク領域も、前記ポン
プ室を、プランジャの摺動面と内部の燃料圧力が閉弁方
向にニードルバルブに作用すべく配設した背圧室とを経
由して低圧燃料側に連通ずる圧力逃し通路と、を設けた
ことを特徴とする内燃機関の燃料噴射装置。A plunger that sucks fuel into a pump chamber through reciprocating motion and pumps it under pressure, and a needle that slides freely on the plunger and partially overlaps the plunger, and that opens and closes a nozzle communicating with the pump chamber in response to the pressure of the pump chamber. A valve, a servo piston device that reciprocates the plunger and controls its reciprocating stroke amount according to engine operating conditions, and a predetermined injection end stroke region of the plunger, which connects the pump chamber to the sliding surface of the plunger. A fuel injection system for an internal combustion engine, characterized in that a pressure relief passage communicates with a low-pressure fuel side via a back pressure chamber arranged so that internal fuel pressure acts on a needle valve in a valve-closing direction. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5350283U JPS59159779U (en) | 1983-04-12 | 1983-04-12 | Internal combustion engine fuel injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5350283U JPS59159779U (en) | 1983-04-12 | 1983-04-12 | Internal combustion engine fuel injection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59159779U true JPS59159779U (en) | 1984-10-26 |
Family
ID=30183847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5350283U Pending JPS59159779U (en) | 1983-04-12 | 1983-04-12 | Internal combustion engine fuel injection system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59159779U (en) |
-
1983
- 1983-04-12 JP JP5350283U patent/JPS59159779U/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS59159779U (en) | Internal combustion engine fuel injection system | |
| GB1080359A (en) | Fuel injection pumps for internal combustion engines | |
| JPS5930555U (en) | Fuel injection pump for diesel engines | |
| JPS5951156A (en) | Fuel injection device of internal-combustion engine | |
| JPS62114147U (en) | ||
| JPS60153830U (en) | internal combustion engine fuel injection pump | |
| JPS5934069U (en) | Fuel injection pump oil feed rate control device | |
| JPS6453459U (en) | ||
| JPS603988Y2 (en) | Fuel injection device for diesel engine | |
| JPS5984270U (en) | Internal combustion engine fuel injection system | |
| JPH0523827Y2 (en) | ||
| JPS59181269U (en) | unit injector | |
| JPS6157144U (en) | ||
| JPS5984269U (en) | Internal combustion engine fuel injection system | |
| JPS5988265U (en) | Internal combustion engine fuel injection system | |
| JPS6075677U (en) | Internal combustion engine fuel injection system | |
| JPS59157573U (en) | Internal combustion engine fuel injection system | |
| JPS6239677B2 (en) | ||
| JPS59179273U (en) | unit injector | |
| JPS59159780U (en) | Internal combustion engine fuel injection system | |
| JPS5812671U (en) | Diesel engine fuel injection system | |
| JPS5990070U (en) | unit injector | |
| JPS6034559U (en) | Fuel injection pump injection rate control device | |
| JPS5832166U (en) | Internal combustion engine fuel injection nozzle | |
| JPS58151352U (en) | internal combustion engine fuel injection pump |