JPS59181269U - unit injector - Google Patents
unit injectorInfo
- Publication number
- JPS59181269U JPS59181269U JP7461083U JP7461083U JPS59181269U JP S59181269 U JPS59181269 U JP S59181269U JP 7461083 U JP7461083 U JP 7461083U JP 7461083 U JP7461083 U JP 7461083U JP S59181269 U JPS59181269 U JP S59181269U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- passage
- plunger
- pump chamber
- opening
- 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図は燃料噴射装置として従来のユニットインジェク
タの例を示す縦断面図、第２図は本考案の一実施例を示
すユニットインジェクタの縦断面図である。
１１・・・リターンスプリング、１２・・・プランジャ
、１５・・・ポンプ室、１６・・・噴射燃料通路、１７
・・・燃料通路、１８・・・燃料タンク、２３・・・ニ
ードルバルブ、２４・・・バルブスプリング、３１・・
・噴口、４゜・・・第１の通路、４１・！・パイロット
噴射用開閉弁、５０・・・第２の通路、５０ａ・・・環
状溝、５０ｂ・・・連通路、５０Ｃ・・・通路、５１・
・・主噴射用電磁開閉弁、６０・・・制御装置。FIG. 1 is a longitudinal sectional view showing an example of a conventional unit injector as a fuel injection device, and FIG. 2 is a longitudinal sectional view of a unit injector showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 11...Return spring, 12...Plunger, 15...Pump chamber, 16...Injection fuel passage, 17
...Fuel passage, 18...Fuel tank, 23...Needle valve, 24...Valve spring, 31...
・Spout, 4°...first passage, 41・! - Pilot injection on-off valve, 50... second passage, 50a... annular groove, 50b... communication passage, 50C... passage, 51.
・・Electromagnetic on-off valve for main injection, 60 ・・Control device.
Claims (1)
をポンプ室内に吸入しこれより噴口に圧送するプランジ
ャを備えたポンプ部と、弾性力を閉弁方向に受けかつ前
記ポンプ室から圧送される燃料圧力を開弁方向に受けて
これらの力のバランスにより噴口を開閉するニードルバ
ルブを備えた噴射弁部と、を有するユニットインジェク
タにわいて、 前記プランジャの圧縮行程の初期領域で前記ポンプ室を
低圧燃料側へ連通ずる第１の通路と該第１の通路に介装
したパイロット噴射用の開閉弁、 、と、前記圧縮行
程の初期領域以外の領域で前記ポ。 ンブ室を低圧燃料側へ連通ずる第２の通路と該第２の通
路に介装した主噴射用の開閉弁と、前記２つの開閉弁の
開閉時期を機関運転状態に応じて制御する制御装置と、
を設けたことを特徴とするユ ゛ニットインジェクタ。[Scope of Claim for Utility Model Registration] A pump section that is equipped with a plunger that sucks fuel into a pump chamber by reciprocating in synchronization with the rotation of an internal combustion engine and pumps it to a nozzle, and a plunger that receives elastic force in the valve closing direction. and an injection valve section including a needle valve that receives fuel pressure pumped from the pump chamber in the valve opening direction and opens and closes the nozzle port based on the balance of these forces, the compression stroke of the plunger a first passage communicating the pump chamber to the low-pressure fuel side in an initial region of the compression stroke; and a pilot injection opening/closing valve interposed in the first passage; . a second passage that communicates the combustion chamber to the low-pressure fuel side; a main injection on-off valve installed in the second passage; and a control device that controls the opening and closing timing of the two on-off valves according to engine operating conditions. and,
A unit injector characterized by having:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7461083U JPS59181269U (en) | 1983-05-20 | 1983-05-20 | unit injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7461083U JPS59181269U (en) | 1983-05-20 | 1983-05-20 | unit injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59181269U true JPS59181269U (en) | 1984-12-03 |
Family
ID=30204698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7461083U Pending JPS59181269U (en) | 1983-05-20 | 1983-05-20 | unit injector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59181269U (en) |
-
1983
- 1983-05-20 JP JP7461083U patent/JPS59181269U/en active Pending
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