JPH0716042Y2 - Fuel injection pump - Google Patents
Fuel injection pumpInfo
- Publication number
- JPH0716042Y2 JPH0716042Y2 JP922289U JP922289U JPH0716042Y2 JP H0716042 Y2 JPH0716042 Y2 JP H0716042Y2 JP 922289 U JP922289 U JP 922289U JP 922289 U JP922289 U JP 922289U JP H0716042 Y2 JPH0716042 Y2 JP H0716042Y2
- Authority
- JP
- Japan
- Prior art keywords
- plunger
- fuel injection
- injection pump
- barrel
- supply port
- 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.)
- Expired - Lifetime
Links
- 238000002347 injection Methods 0.000 title claims description 25
- 239000007924 injection Substances 0.000 title claims description 25
- 239000000446 fuel Substances 0.000 title claims description 13
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000036461 convulsion Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案はディーゼル機関に使用される燃料噴射ポンプに
関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a fuel injection pump used in a diesel engine.
従来形ジャーク式燃料噴射ポンプのプランジャは第３〜
４図のように噴射終り制御用リードｊは斜めに切欠かれ
ているのに対し、下部リード線ｉが水平となっている。The conventional jerk type fuel injection pump has a third plunger
As shown in FIG. 4, the injection end control lead j is obliquely cut out, while the lower lead wire i is horizontal.
従って切欠部ｋの面積を展開すると三角形状となり、切
欠部分に作用する燃料噴射時の高圧油圧により第３図に
示すような大きい値の側圧を発生しプランジャａの先端
部がプランジャバレルに押し付けられてステックや偏摩
耗を誘発する。Therefore, when the area of the notch k is expanded, it becomes triangular, and the high pressure oil pressure at the time of fuel injection that acts on the notch causes a large side pressure as shown in FIG. 3 to push the tip of the plunger a against the plunger barrel. Induces sticking and uneven wear.
本考案の目的は前記従来装置の問題点を解消し、プラン
ジャのスティックが生じにくく耐久性、信頼性の高い燃
料噴射ポンプを提供するにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the conventional device and to provide a fuel injection pump with high durability and high reliability in which sticking of the plunger hardly occurs.
本考案の燃料噴射ポンプは、上下動を行なうプランジャ
とプランジャの摺動するプランジャバレルにより構成さ
れ、プランジャバレルの給油ポートをプランジャ上部フ
ランド部で塞ぐことにより圧縮を行なうジャーク式燃料
噴射ポンプにおいて、切欠き下部リード線i1を噴射終り
制御用リード線ｊとほぼ平行としプランジャ切欠部ｓを
形成すると共に、無噴射位置でプランジャランドａがプ
ランジャバレルの給油口ｂを塞がないようにする短冊状
の溝g,lを設けたことを特徴としている。The fuel injection pump of the present invention comprises a plunger that moves up and down and a plunger barrel on which the plunger slides.The jerk fuel injection pump that compresses by closing the oil supply port of the plunger barrel with the upper land part of the plunger A strip shape that makes the notch lower lead wire i 1 substantially parallel to the injection end control lead wire j to form a plunger cutout portion s, and prevents the plunger land a from blocking the oil supply port b of the plunger barrel at the non-injection position. It is characterized in that grooves g and l are provided.
下部リードi1,hを噴射終り制御用リードｊとほぼ平行に
して切欠部ｓの面積を最小としプランジャに作用する側
圧を最小とし、プランジャステックを防止する。又みぞ
l,gを設けたため無噴射時にプランジャバレルの結油口
を塞ぐことがない。The lower leads i 1 and h are made substantially parallel to the injection end control lead j to minimize the area of the notch s and minimize the lateral pressure acting on the plunger to prevent the plunger stick. Matamizo
Since l and g are provided, the oil inlet of the plunger barrel is not blocked when there is no injection.
以下第１〜２図を参照し本考案の一実施例について説明
する。An embodiment of the present invention will be described below with reference to FIGS.
第１図は第１実施例であり、下部リード線i1を噴射終り
制御用リード線ｊとほぼ平行とし切欠部ｓを形成する。
これにより円周方向で切欠面積がほぼ均一となり、切欠
面積も小さく且水平半径方向にはほぼバランスがとれ
る。ただし少量曲げモーメントは残るが、この曲げモー
メントにより発生する側圧は従来例に較べれば極めて小
さい値となるため、プランジャのスティックなどの発生
するおそれは殆んどない。又横溝ｌを設けたため無噴射
時ｘでプランジャバレルの給排油口ｂを塞いで異常噴射
を発生するおそれはない。FIG. 1 shows the first embodiment, in which the lower lead wire i 1 is made substantially parallel to the injection end control lead wire j and a notch s is formed.
As a result, the notch area becomes substantially uniform in the circumferential direction, the notch area is small, and the horizontal radial direction is almost balanced. However, although a small amount of bending moment remains, the lateral pressure generated by this bending moment is extremely small compared to the conventional example, so there is almost no possibility of sticking of the plunger or the like. Further, since the lateral groove 1 is provided, there is no possibility that the fuel injection / exhaust port b of the plunger barrel is closed at the time of no injection x to cause abnormal injection.
第２図は第２実施例で無噴射域ｘでプランジャａが給油
口ｂを塞がないように縦溝ｇを設けている以外は第１実
施例と異らない。FIG. 2 is the same as the first embodiment except that a vertical groove g is provided so that the plunger a does not block the oil supply port b in the non-injection area x in the second embodiment.
本考案は前記のとおり構成したので、従来型ジャーク式
燃料噴射ポンプの基本的構造及び特性等を変えることな
く、プランジャのスティックが生じにくく耐久性、信頼
性の高い燃料噴射ポンプを提供できる。Since the present invention is configured as described above, it is possible to provide a fuel injection pump that is unlikely to cause sticking of the plunger and has high durability and reliability without changing the basic structure and characteristics of the conventional jerk fuel injection pump.
第１〜２図は本考案に係るもので、第１図は第１実施例
のプランジャ展開図、第２図は第２実施例の第１図応当
図、第３〜４図は従来例に係るもので、第３図は燃料噴
射ポンプの断面図、第４図はプランジャ展開図である。 ａ……プランジャ上部ラント部、ｂ……給油口、g,l…
…溝、i1,h……下部リード線、ｊ……噴射終り制御用上
部リード線、ｓ……プランジャ切欠部。FIGS. 1 and 2 relate to the present invention. FIG. 1 is an exploded view of the plunger of the first embodiment, FIG. 2 is a corresponding drawing of FIG. 1 of the second embodiment, and FIGS. FIG. 3 is a sectional view of the fuel injection pump, and FIG. 4 is a plunger development view. a: Plunger top runt, b: Oil filler, g, l ...
… Grooves, i 1 , h …… Lower lead wire, j …… Upper injection control upper lead wire, s …… Plunger notch.
Claims (1)
の摺動するプランジャバレルにより構成され、プランジ
ャバレルの給油口（ｂ）をプランジャ上部ランド部
（ａ）で塞ぐことにより圧縮を行なうジャーク式燃料噴
射ポンプにおいて、下部リード線（i1），（ｈ）を噴射
終り制御用上部リード線（ｊ）とほぼ平行とし、プラン
ジャ切欠部（ｓ）を形成すると共に、無噴射位置でプラ
ンジャランド部が、プランジャバレルの給油口（ｂ）を
塞がないようにする短冊状の溝（ｇ），（ｌ）を設けた
ことを特徴とする燃料噴射ポンプ。1. A jerk-type fuel injection system which comprises a plunger that moves up and down and a plunger barrel that slides on the plunger, and performs compression by closing an oil supply port (b) of the plunger barrel with a plunger upper land (a). In the pump, the lower lead wires (i 1 ) and (h) are made substantially parallel to the injection end control upper lead wire (j) to form the plunger cutout portion (s), and the plunger land portion at the non-injection position is A fuel injection pump, characterized in that strip-shaped grooves (g) and (l) are provided so as not to block the oil supply port (b) of the plunger barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP922289U JPH0716042Y2 (en) | 1989-01-31 | 1989-01-31 | Fuel injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP922289U JPH0716042Y2 (en) | 1989-01-31 | 1989-01-31 | Fuel injection pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02101072U JPH02101072U (en) | 1990-08-10 |
| JPH0716042Y2 true JPH0716042Y2 (en) | 1995-04-12 |
Family
ID=31215780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP922289U Expired - Lifetime JPH0716042Y2 (en) | 1989-01-31 | 1989-01-31 | Fuel injection pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0716042Y2 (en) |
-
1989
- 1989-01-31 JP JP922289U patent/JPH0716042Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02101072U (en) | 1990-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| IT8221436A0 (en) | IMPROVEMENT IN THE CONTROL OF PISTONS IN INJECTION PUMPS FOR INTERNAL COMBUSTION ENGINES. | |
| JPH02101072U (en) | ||
| DE58900103D1 (en) | CONTROL DEVICE FOR INJECTION PUMPS OF DIESEL INTERNAL COMBUSTION ENGINES, WHICH ADAPTS THE INJECTION AMOUNT TO CHARGE PRESSURE. | |
| JPS59131965U (en) | Injection amount control device for distribution type fuel injection pump | |
| GB1475528A (en) | Fuel injection pumps for internal combustion engines | |
| JPH0228565U (en) | ||
| JPH0250173U (en) | ||
| JPS6271371U (en) | ||
| JPH0432260U (en) | ||
| JPS5848979U (en) | Internal combustion engine fuel injection pump device | |
| JPH03104169U (en) | ||
| JPS58161141U (en) | Internal combustion engine air regulator | |
| JPS63158552U (en) | ||
| JPS6360074U (en) | ||
| JPS59130039U (en) | Injection timing control device for distributed fuel injection pump for diesel engine | |
| JPS59184369U (en) | row type fuel injection pump | |
| JPS5846839U (en) | Injection timing control device for fuel injection pumps for internal combustion engines | |
| JPH0432259U (en) | ||
| JPH031251U (en) | ||
| JPS5833733U (en) | direct injection internal combustion engine | |
| JPH0442265U (en) | ||
| JPS5932170U (en) | Diesel engine fuel injection system | |
| JPS59130063U (en) | Fuel injection pump injection rate control device | |
| JPS58124631U (en) | Fuel injection amount control device for fuel injection engines | |
| JPS60112643U (en) | Governor device for fuel-injected engines |