JPS5939964A - Timing control device in unit injector - Google Patents
Timing control device in unit injectorInfo
- Publication number
- JPS5939964A JPS5939964A JP15010582A JP15010582A JPS5939964A JP S5939964 A JPS5939964 A JP S5939964A JP 15010582 A JP15010582 A JP 15010582A JP 15010582 A JP15010582 A JP 15010582A JP S5939964 A JPS5939964 A JP S5939964A
- Authority
- JP
- Japan
- Prior art keywords
- unit injector
- rocker
- cam
- rocker arm
- rocker shaft
- 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
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
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/02—Injectors structurally combined with fuel-injection pumps
- F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
- F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
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】
本発明はディーゼルエンジンの燃料噴射装置に関し、更
に詳しくはユニットインジェクタに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel injection system for a diesel engine, and more particularly to a unit injector.
ユニットインジェクタはエンジンのシリンダヘッドに直
接取９付けられ、ロッカーアームによってタベツ）ｋた
たいて燃料を噴射する形式の燃料噴射装置である。A unit injector is a fuel injection device that is attached directly to the engine's cylinder head and injects fuel by tapping it with a rocker arm.
ユニットインジェクタは燃料噴射ポンプと燃料噴射弁と
七一体化し、噴射管を省略したものであるから、噴射管
に由来する噴射特性の不安定がなく、有益である反面、
タイミングコントロール装置が複雑と在る欠点があった
。Since the unit injector is integrated with the fuel injection pump and fuel injection valve and eliminates the injection pipe, it is advantageous because there is no instability in injection characteristics caused by the injection pipe.
The drawback was that the timing control device was complicated.
本発明の目的は簡単な構造により確実なタイミングコン
トロールを行えるようにした装置ｎｋ提供するにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a device that can perform reliable timing control with a simple structure.
以下、図によって説明するＣ
第１図は本発明の一実施例を示す断面図であり、第２図
は第１図のＡ−Ａ方向矢印図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a cross-sectional view showing an embodiment of the present invention, and FIG. 2 is a diagram taken along the arrow A--A in FIG. 1.
図において、ユニットインジェクタ１はシリンダヘッド
２に取り付けられており、燃焼室（図示せず）内に直接
燃料全噴射する。ユニットインジェクタは頂部にタペッ
ト６を有しており、スプリング４によって上方へ付勢さ
れている。In the figure, a unit injector 1 is attached to a cylinder head 2, and injects all fuel directly into a combustion chamber (not shown). The unit injector has a tappet 6 on the top and is biased upward by a spring 4.
ロッカーアーム５はロッカーシャフト６に設けられた偏
心体７に揺動自在に取付けられ、一端はタペット６と当
接し、他端にはローラ８が町回動に設けられ、該ローラ
８はカムシャフト９に設けられたカム山１０に当接して
いる。ロッカーシャフト６の中心ｏ１と偏心体７の中心
０２とはｅだけ偏心している。The rocker arm 5 is swingably attached to an eccentric body 7 provided on a rocker shaft 6, one end is in contact with the tappet 6, and the other end is provided with a roller 8 for free rotation, and the roller 8 is connected to the camshaft. It is in contact with a cam ridge 10 provided at 9. The center o1 of the rocker shaft 6 and the center 02 of the eccentric body 7 are eccentric by e.
ロッカーシャフト６としてはバルブ開閉用ロッカーアー
ム１１のロッカーシャフトヲ兼用することが望ましいが
、ユニットインジェクタ専用のロッカーシャフトとする
ことも本発明に含むものである。Although it is desirable that the rocker shaft 6 also be used as the rocker shaft of the valve opening/closing rocker arm 11, the present invention also includes a rocker shaft dedicated to the unit injector.
又、カムシャフト９もパルプ開閉用カムシャツトラ兼用
、することが望ましいが、ユニットインジェクタ専用の
カムシャフトとすることも本発明に含むものである。Although it is desirable that the camshaft 9 also be used as a camshaft for opening and closing the pulp, the present invention also includes a camshaft dedicated to the unit injector.
ロッカーシャフト６の端部にはハンドル１２が設けられ
、可回動に設けられたロッカ−シャフト６全回動させる
。A handle 12 is provided at the end of the rocker shaft 6, and the rotatably provided rocker shaft 6 is fully rotated.
以上の如く構成された本発明の詳細な説明する。The present invention configured as described above will be explained in detail.
今、ロッカーシャフト６の位置が第１図の実線位置にあ
るものとし、カムシャフト９が図のＰ方向へ回転するも
のとする。すると、ローラ８とカム山１Ｄとの接点はａ
点となる。Assume now that the rocker shaft 6 is at the solid line position in FIG. 1, and the camshaft 9 is rotated in the direction P in the figure. Then, the point of contact between the roller 8 and the cam crest 1D is a
It becomes a point.
カムシャフト９が回転すると、ローラ８１１１カム山１
０に沿って転動し、ロッカーアーム５は揺動される。こ
のため、タペット６はスプリング４に抗して押し下げら
れ、燃料噴射が行われる。When the camshaft 9 rotates, the roller 8111 cam crest 1
0, and the rocker arm 5 is swung. Therefore, the tappet 6 is pushed down against the spring 4, and fuel injection is performed.
さて、上記実線位置における噴射時期よりもタイミング
を遅く噴射すべきとなった場合、ロッカ−シャフト６奮
図の矢印Ｑ方向へ回動させる。すると、ロッカーアーム
５が図の破線の位置どなり、ローラ８とカム山１０との
接点がｂ点に移る。このため、噴射のタイミングが図の
αだけ遅れるものとなる。Now, if the injection timing should be later than the injection timing at the solid line position, the rocker shaft 6 is rotated in the direction of arrow Q. Then, the rocker arm 5 moves to the position indicated by the broken line in the figure, and the contact point between the roller 8 and the cam ridge 10 moves to point b. Therefore, the timing of injection is delayed by α in the figure.
他方、噴射のタイミングケ早めるには図のＱとは反対方
向にロッカ−シャフト６會回動させるとよい。On the other hand, in order to advance the injection timing, it is recommended to rotate the rocker shaft 6 degrees in the direction opposite to Q in the figure.
本発明の上記実施例においては、オーバーヘッドカムシ
ャフトとしてロッカーアームを直接カム山と当接させて
いるが、本発明は上記実施例に限定されるものではなく
、ロッカーアームとカム山との当接位相をロッカーシャ
フトの偏心体によって変更させるもの全全て含むもので
ある。In the above embodiments of the present invention, the rocker arm as an overhead camshaft is brought into direct contact with the cam ridges, but the present invention is not limited to the above embodiments, and the rocker arm and the cam ridges are in direct contact with each other. This includes all devices in which the phase is changed by an eccentric body of a rocker shaft.
以上のとおり、本発明によると、簡単な構造で噴射タイ
ミングの変更が可能なユニットインジェクタのコントロ
ール装置が得られるものである。As described above, according to the present invention, it is possible to obtain a control device for a unit injector that has a simple structure and is capable of changing injection timing.
第１図は本発明の一実施例を示す断面図、第２図は第１
図のＡ−Ａ方向矢視図である。FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
It is an AA direction arrow view of a figure.
Claims (1)
れ、他方端でユニットインジェクタのタペットを′ｆｃ
′／ｃいて燃料を噴射するようにしたユニットインジェ
クタにおいて、前記ロッカーアームのロッカーシャフト
に偏心体ヲ設ケ、該偏心体の回りに揺動可能に前記ロッ
カーアーム上膜け、前記ロッカーシャフト又は偏心体可
回動に設けたことを特徴とするユニットインジェクタに
おけるタイミングコン）・ロール装置０One end of the rocker arm contacts the assembly cam and swings, and the other end controls the tappet of the unit injector.
In a unit injector configured to inject fuel with Timing controller in a unit injector characterized by being provided with a rotatable body)・Roll device 0
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15010582A JPS5939964A (en) | 1982-08-31 | 1982-08-31 | Timing control device in unit injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15010582A JPS5939964A (en) | 1982-08-31 | 1982-08-31 | Timing control device in unit injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5939964A true JPS5939964A (en) | 1984-03-05 |
Family
ID=15489606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15010582A Pending JPS5939964A (en) | 1982-08-31 | 1982-08-31 | Timing control device in unit injector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5939964A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61226562A (en) * | 1985-03-29 | 1986-10-08 | Hino Motors Ltd | Unit injector driving mechanism for use with internal-combustion engine |
| JPS6412009A (en) * | 1987-07-01 | 1989-01-17 | Yanmar Diesel Engine Co | Valve arm support structure for intake and exhaust valves of diesel engine |
| US4872427A (en) * | 1988-11-29 | 1989-10-10 | Cummins Engine Company, Inc. | Position controller for a rotatable shaft |
| JPH0388906A (en) * | 1989-08-16 | 1991-04-15 | Cummins Engine Co Inc | Cam following system and cam following assembly |
| US5713335A (en) * | 1995-09-12 | 1998-02-03 | Cummins Engine Company, Inc. | Variable injection timing and injection pressure control arrangement |
| US5839411A (en) * | 1993-04-16 | 1998-11-24 | Schoell; Harry | Rotary fuel pump and combination fuel injector/spark plug |
-
1982
- 1982-08-31 JP JP15010582A patent/JPS5939964A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61226562A (en) * | 1985-03-29 | 1986-10-08 | Hino Motors Ltd | Unit injector driving mechanism for use with internal-combustion engine |
| JPS6412009A (en) * | 1987-07-01 | 1989-01-17 | Yanmar Diesel Engine Co | Valve arm support structure for intake and exhaust valves of diesel engine |
| US4872427A (en) * | 1988-11-29 | 1989-10-10 | Cummins Engine Company, Inc. | Position controller for a rotatable shaft |
| JPH0388906A (en) * | 1989-08-16 | 1991-04-15 | Cummins Engine Co Inc | Cam following system and cam following assembly |
| US5839411A (en) * | 1993-04-16 | 1998-11-24 | Schoell; Harry | Rotary fuel pump and combination fuel injector/spark plug |
| US5713335A (en) * | 1995-09-12 | 1998-02-03 | Cummins Engine Company, Inc. | Variable injection timing and injection pressure control arrangement |
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