JPS58126459A - Injection timing adjusting device of fuel injection pump - Google Patents
Injection timing adjusting device of fuel injection pumpInfo
- Publication number
- JPS58126459A JPS58126459A JP15390981A JP15390981A JPS58126459A JP S58126459 A JPS58126459 A JP S58126459A JP 15390981 A JP15390981 A JP 15390981A JP 15390981 A JP15390981 A JP 15390981A JP S58126459 A JPS58126459 A JP S58126459A
- Authority
- JP
- Japan
- Prior art keywords
- piston
- injection
- cam
- cylinder
- hole
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/30—Varying fuel delivery in quantity or timing with variable-length-stroke pistons
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、ディーゼル機関の単節形燃料噴射ポンプつ
１り機関の１シリンダ当り１台のポンプを有する型式の
ものに適用できる噴射時期調整装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an injection timing adjustment device that can be applied to a single-section fuel injection pump diesel engine having one pump per cylinder.
周知のようにディーゼル機関の燃料噴射ポンプは、噴射
に必要な圧力を燃料に与えてノズルまで圧送し、また機
関の負荷に応じて噴射筒゛を加減するものであって、カ
ム軸を介して機関のクランク軸により駆動される。この
噴射ポンプは機関のシリンダ数と同一数のプランジャを
有し、このプランジャが上記カム軸のカムによって上下
に往復動するとともに、このプランジャがラック棒によ
って回動され、ポンプ主体ＶＣ対しプランジャの切欠き
の位置が変えられ噴射油量が加減されるものであるが、
噴射始めの時↓υ」ハ、上記カム軸のカムによりローラ
ーを介して上下動し、噴射ポンププランジャ下面を押圧
する昇降部材の長さによって調節される。すなわち昇降
部材の長さを長くすれはカムの回転角度の早い時期に前
記燃料噴射ボ／ブのプランジャを突き上げ、また昇降部
材の長さを短かくすればこの逆となる。As is well known, the fuel injection pump for a diesel engine applies the pressure necessary for injection to the fuel and pumps it to the nozzle, and also adjusts the injection cylinder depending on the engine load. Driven by the engine's crankshaft. This injection pump has the same number of plungers as the number of cylinders in the engine, and these plungers are reciprocated up and down by the cam of the camshaft, and this plunger is also rotated by a rack rod, so that the plunger is disconnected from the pump main body VC. The position of the notch is changed and the amount of oil injected is adjusted.
At the beginning of injection ↓υ', the cam of the camshaft moves up and down via a roller, and is adjusted by the length of the elevating member that presses the lower surface of the injection pump plunger. That is, by increasing the length of the elevating member, the plunger of the fuel injection tube is pushed up at an early stage of the rotation angle of the cam, and by shortening the length of the elevating member, the opposite is true.
従来、この昇降部月の長さは調節ネジにより適宜調整で
きるようになっており、この調整はスパナを用いてこの
調節ネジのナツトを回わす手作業により適当にセットす
ることが行われていた。Conventionally, the length of this lifting part could be adjusted as appropriate using an adjustment screw, and this adjustment was done manually by turning the nut of this adjustment screw using a wrench to set it appropriately. .
この場合、負荷や回転速度により最適の噴射始めの時期
は異なるから、この取付長さの調整を常に最適噴射始め
の時期に追随して行われるようにしておけば、つまり負
荷の軽い場合はタイミングを遅らせ、回転が遅い場合は
タイミングを早めるようにしておけば最適燃焼を保持で
きるわけである。In this case, the optimal time to start injection varies depending on the load and rotation speed, so if you always adjust the installation length to follow the optimal time to start injection, in other words, if the load is light, the timing Optimum combustion can be maintained by delaying the timing and advancing the timing when the rotation is slow.
この発明は上記の点に着目して昇降装置のローラーから
の取付長さを、機関運転中に容易に調整できるようにす
るとと本に、予め電気的に検出された最適時期に見合う
長さに自動的に保持されるようにしたものであって、こ
の発明の実施例を図面について説明すると、第１図は縦
断面図を示し１は機関のカム軸に設けられたカム、２は
機関に固設された燃料ポンプ生体、６はこのポンプ主体
のプランジャであって、この発明においてはプランジャ
３は、下端のローラー４をカム１に係合して上下往復動
を繰り返す昇降部材５上に載架されている。Focusing on the above points, this invention aims to make it possible to easily adjust the length of the lifting device from the roller during engine operation, and to adjust the length to match the optimal timing detected electrically in advance. The embodiment of the present invention will be explained with reference to the drawings. Fig. 1 shows a longitudinal cross-sectional view, numeral 1 indicates a cam installed on the camshaft of the engine, and numeral 2 indicates a cam installed on the cam shaft of the engine. The fixed fuel pump body 6 is a plunger of this pump, and in this invention, the plunger 3 is mounted on an elevating member 5 that engages a roller 4 at the lower end with a cam 1 and repeats up and down reciprocation. It is suspended.
この昇降部材５は、機関に設けられた案内筒６に周面を
嵌合してカム１により昇降する油圧シリンダ７と、その
内部にバネ８により常時上昇方向に付勢されて嵌挿され
た油圧ピストン９で形成されている。油圧シリンダ７の
上縁は一方に傾斜する斜切面１０となっており、また油
圧ピストン９は、下半部が空洞部１１となっていて、そ
の上端部分に外部に通ずる小孔１２を有するとともに、
上端に近く外周ｉｎ１にスプライン１３が縦設され、こ
のスプライン１３に内面を係合して第２図に拡大して示
す如く別に下面に保合歯１４を放射状に列設した歯輪１
５が、相互に回動は不能であるが摺動は可能な・ように
３−
嵌装されており、この保合歯１４に係合して案内筒６上
に軸設されたウオーム状のらせん歯１６を、その回動軸
である調整杆１７を適宜の駆動模構を介して回転するこ
とにより、油圧ピストン９はそれ自身の上下運動に関係
なく随時回動されるようになっている。さらに案内筒６
の上方には潤滑油供給管１８が設けられ常に案内筒６内
に潤滑油を補給するように々つている。なお、前記油圧
ピストン９と歯輪１５との係合はスプラインやセレーシ
ョ／のほかにすべりキーを用いてもよい。This elevating member 5 includes a hydraulic cylinder 7 whose peripheral surface is fitted into a guide cylinder 6 provided in the engine and which is moved up and down by a cam 1, and a hydraulic cylinder 7 that is inserted into the hydraulic cylinder 7 and is constantly biased in the upward direction by a spring 8. It is formed by a hydraulic piston 9. The upper edge of the hydraulic cylinder 7 has a beveled surface 10 that slopes to one side, and the lower half of the hydraulic piston 9 has a hollow section 11, and has a small hole 12 communicating with the outside at its upper end. ,
A gear wheel 1 has a spline 13 installed vertically on the outer periphery in1 near the upper end, the inner surface engages with the spline 13, and retaining teeth 14 are arranged radially on the lower surface as shown in an enlarged view in FIG.
5 are fitted in such a way that they cannot rotate but can slide relative to each other, and a worm-shaped shaft that engages with the retaining teeth 14 and is pivotally mounted on the guide tube 6. By rotating the helical tooth 16 and the adjustment rod 17, which is its rotation axis, via an appropriate drive mechanism, the hydraulic piston 9 can be rotated at any time regardless of its own vertical movement. . Furthermore, guide tube 6
A lubricating oil supply pipe 18 is provided above the guide cylinder 6 so as to constantly supply lubricating oil into the guide cylinder 6. The hydraulic piston 9 and the toothed ring 15 may be engaged with each other by using a sliding key instead of a spline or serration.
この発明は上■己の構成により、第１図の状態では小孔
１２は胴切面１０より相当上方に在るから、カム１によ
り油圧シリンダ７が上昇すると油圧ピストン９の空洞１
１内の潤滑油は小孔１２から案内＠６内に流出して油圧
ピストン９は、小孔１２が油圧シリンダ７の斜切面１０
で閉塞されるまでは押し上げられないが、いま調野杆１
７を介して油圧ピストン９を所要角度同一し、小孔１２
を斜切面１０の頂部側に向わせ４−
ると、小孔１２と斜切面１０とは近接し、このため油圧
シリンダ７が上昇すると小孔１２は斜切面１０との距離
に応じた時間で閉基され油圧ピストン９の空洞部１１に
は潤滑油が充満した捷まとなるから、油圧ピストン９つ
まり昇降部材５は油圧シリンダ７と一体となって昇降す
るようにな如、これに連なるプランジャ３は上記小孔１
２の閉塞時期に対応して噴射を早く始めることになる。In this invention, due to the above-described configuration, in the state shown in FIG.
The lubricating oil in 1 flows out from the small hole 12 into the guide @ 6, and the hydraulic piston 9
Although it cannot be pushed up until it is blocked by the
7 through the hydraulic piston 9 at the same required angle, and the small hole 12
When the small hole 12 and the beveled surface 10 are oriented toward the top side of the beveled surface 10, the small hole 12 and the beveled surface 10 are brought close to each other. Therefore, when the hydraulic cylinder 7 is raised, the small hole 12 is opened at a time corresponding to the distance from the beveled surface 10. Since the hollow portion 11 of the hydraulic piston 9 is closed and becomes a hole filled with lubricating oil, the hydraulic piston 9, that is, the elevating member 5 moves up and down together with the hydraulic cylinder 7, and the plunger connected thereto 3 is the small hole 1 mentioned above
Injection is started early in response to the blockage timing in step 2.
したがって、調整杆１７の駆動を、電気的検知機構など
により、機関の状態に連動して所定時期に所定の回転量
だけ作動するようにセットしておくことにより、昇降部
材５の回動角が変化してプランジャ６の噴射開始時期を
常に最適の状態に保持しておくことができる０
この発明は以上のように、調整杆１７を回転させること
により簡単に噴射始めの時期を変えることができるから
自動制御が可能である。そして油圧ピストンに対する回
動力は、小径のウオーム状のらせん爾１６から油圧ピス
トン９を取り唸く相当大径の保合−１４に伝達されて行
われるものであるから、回動は逆方向には伝えられず、
かつ制御用動力も小さいものでよい等の利点がある。Therefore, by setting the adjustment rod 17 to operate by a predetermined amount of rotation at a predetermined time in conjunction with the state of the engine using an electrical detection mechanism or the like, the rotation angle of the elevating member 5 can be adjusted. As described above, this invention allows the injection start timing to be easily changed by rotating the adjustment rod 17. Automatic control is possible from The rotational force on the hydraulic piston is transmitted from the small-diameter worm-shaped helix 16 to the relatively large-diameter retainer 14 that grips the hydraulic piston 9, so rotation is performed in the opposite direction. Unable to convey,
It also has the advantage that only a small amount of power is needed for control.
第１図はプランジャの下降時期におけるこの発明の説明
縦断囲図、第２図はらせん山の４Ｊ４１１面図である。
１はカム、２は燃料ポンプ主体、６はプランジャ、４は
ローラー、５は昇降部材、６は案内筒、７は油圧シリン
グ＼８はバネ、９は油圧ピストン、１０は斜切面、１１
は空洞部、１２は小孔、１３はスプライン、１４は保合
出、１５は歯輪、１６はらせん１菖、１７は調整杆、１
８は簡滑油袖給官を示す。
＝７−
手続補正書
昭和５８ イｌ ６ 月２ 日
昭和５６ 年特許願第１５５９０９ 月２、発明の名称
燃料噴射ポンプの噴射時期調整装置
３、補正をする者
事件との関係 特許出願人
？１称（８９８）株式会社新潟鉄工所
昭和５８／、１２月 ２ 日（発送日 昭和５８年 ２
１−１２２日）発明の名称「燃料噴射ポンプ噴射時期調
整装置」を［燃料噴射ポンプの噴射時期調整装置」と補
正する。FIG. 1 is an explanatory vertical cross-sectional view of the present invention during the period of descent of the plunger, and FIG. 2 is a 4J411 side view of the spiral mountain. 1 is a cam, 2 is a fuel pump main body, 6 is a plunger, 4 is a roller, 5 is an elevating member, 6 is a guide cylinder, 7 is a hydraulic cylinder \8 is a spring, 9 is a hydraulic piston, 10 is a beveled surface, 11
12 is a hollow part, 12 is a small hole, 13 is a spline, 14 is a retaining part, 15 is a tooth ring, 16 is a spiral 1 iris, 17 is an adjustment rod, 1
8 indicates a simple oil supply officer. =7- Procedural Amendment Written June 2, 1982 Patent Application No. 155909 September 2, Title of Invention Fuel Injection Pump Injection Timing Adjustment Device 3, Person Who Makes Amendment Relationship with Case Patent Applicant? 1st name (898) Niigata Tekkosho Co., Ltd. 1982/, December 2nd (Shipping date: 2nd year of 1988)
1-122) The title of the invention "Fuel injection pump injection timing adjustment device" is amended to "Fuel injection pump injection timing adjustment device."
Claims (1)
ランジャが上下に往復動される燃料噴射ポンプにおいて
、上記プランジャを下端が前記カムに係合して昇降する
昇降部材上に載架取付するとともに、この昇降部材は、
機関に設けた案内筒に嵌合され上縁を斜切面として開［
１する油圧シリンダ内に、下面に空洞部を有し、かつ周
面に空洞部に連なる小孔を所要部さに設けた油圧ピスト
ンを嵌挿して形成され、さらに油圧ピストンの周面には
この油圧ピストンの軸線方向に沿って摺動のみ可能に歯
輪を嵌挿し、かつ歯輪を別に前記案内筒の上ｌｆｌ飛所
に設けた調整杆に連なるウオーム状のらせん歯に係合し
て、この油圧ピストンを所要角度回動自在としてなる燃
料噴射ポンプの噴射時ル贈口と装置。In a fuel injection pump in which each plunger is reciprocated up and down via a roller by a cam provided on a camshaft of an engine, the plunger is mounted on an elevating member whose lower end engages with the cam and moves up and down. , this elevating member is
It is fitted into a guide tube installed in the engine and opens with the upper edge as a beveled surface.
A hydraulic piston having a hollow portion on the lower surface and small holes connected to the hollow portion on the circumferential surface is inserted into the hydraulic cylinder. A tooth ring is fitted so as to be slidable only along the axial direction of the hydraulic piston, and the tooth ring is engaged with a worm-shaped helical tooth connected to an adjustment rod separately provided in the upper lfl space of the guide cylinder, This hydraulic piston can be freely rotated through a required angle to provide a fuel injection pump with an injection opening and a device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15390981A JPS58126459A (en) | 1981-09-30 | 1981-09-30 | Injection timing adjusting device of fuel injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15390981A JPS58126459A (en) | 1981-09-30 | 1981-09-30 | Injection timing adjusting device of fuel injection pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58126459A true JPS58126459A (en) | 1983-07-27 |
| JPS6112110B2 JPS6112110B2 (en) | 1986-04-07 |
Family
ID=15572750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15390981A Granted JPS58126459A (en) | 1981-09-30 | 1981-09-30 | Injection timing adjusting device of fuel injection pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58126459A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4617903A (en) * | 1984-07-11 | 1986-10-21 | Mtu Motoren Und Turbinen-Union Friedrichshafen Gmbh | Diesel engine with injection pump coordinated to each cylinder |
| JPS61173770U (en) * | 1985-04-18 | 1986-10-29 | ||
| JPS6221471U (en) * | 1985-07-24 | 1987-02-09 | ||
| JPS6276281U (en) * | 1985-10-31 | 1987-05-15 | ||
| JPH09506296A (en) * | 1993-12-01 | 1997-06-24 | シーメンス アクチエンゲゼルシヤフト | Casting and rolling equipment for steel strip and its adjusting system |
-
1981
- 1981-09-30 JP JP15390981A patent/JPS58126459A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4617903A (en) * | 1984-07-11 | 1986-10-21 | Mtu Motoren Und Turbinen-Union Friedrichshafen Gmbh | Diesel engine with injection pump coordinated to each cylinder |
| JPS61173770U (en) * | 1985-04-18 | 1986-10-29 | ||
| JPH057499Y2 (en) * | 1985-04-18 | 1993-02-25 | ||
| JPS6221471U (en) * | 1985-07-24 | 1987-02-09 | ||
| JPH0447418Y2 (en) * | 1985-07-24 | 1992-11-09 | ||
| JPS6276281U (en) * | 1985-10-31 | 1987-05-15 | ||
| JPH09506296A (en) * | 1993-12-01 | 1997-06-24 | シーメンス アクチエンゲゼルシヤフト | Casting and rolling equipment for steel strip and its adjusting system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6112110B2 (en) | 1986-04-07 |
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