JPH08144890A - Fuel injector - Google Patents
Fuel injectorInfo
- Publication number
- JPH08144890A JPH08144890A JP29089894A JP29089894A JPH08144890A JP H08144890 A JPH08144890 A JP H08144890A JP 29089894 A JP29089894 A JP 29089894A JP 29089894 A JP29089894 A JP 29089894A JP H08144890 A JPH08144890 A JP H08144890A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- intake valve
- valve
- injection device
- fuel injection
- 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)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、内燃機関に用いられる
燃料噴射装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injection device used in an internal combustion engine.
【０００２】[0002]
【従来の技術】従来は特開平5−288132 号公報に記載の
ように、燃料ポンプと燃料噴射ノズルを一体的に構成
し、弁腕を介してカムと連結したものである。燃料は、
カムの回転により燃料ポンプ上部にある弁腕がタペット
を押圧し、燃料噴射ノズルより副燃焼室に噴射される。
また、噴射量を調整するためにプランジャバレルにコン
トロールレバー，コントロールロッドを結合ピン，結合
レバー等と連結したものである。2. Description of the Related Art Conventionally, as described in JP-A-5-288132, a fuel pump and a fuel injection nozzle are integrally formed and connected to a cam via a valve arm. The fuel is
The valve arm above the fuel pump presses the tappet by the rotation of the cam, and the tappet is injected into the auxiliary combustion chamber from the fuel injection nozzle.
In addition, a control lever and a control rod are connected to a plunger barrel, a connecting pin, a connecting lever, and the like in order to adjust the injection amount.
【０００３】[0003]
【発明が解決しようとする課題】近代、自動車社会でＮ
ＯｘやＨＣ等の大気汚染は深刻な問題である。その原因
の一つとして燃料が未燃焼のまま大気中に排出されてい
ることである。これは、インテークマニホールド内に燃
料を噴射した際、燃料が内壁に付着したり、インテーク
バルブ付近で吹き返し等がおこることによる燃焼効率の
悪化等が考えられる。その対策として、ガソリンエンジ
ンでも燃焼効率を上げるため、気筒内に直接燃料を噴射
する方法が検討されている。現在のところは主に副燃焼
室を設け、電磁式燃料噴射弁等により燃料を供給する方
法がとられている。[Problems to be Solved by the Invention] In the modern automobile society, N
Air pollution such as Ox and HC is a serious problem. One of the causes is that fuel is discharged into the atmosphere without being burned. This is because, when the fuel is injected into the intake manifold, the fuel adheres to the inner wall, or blowback occurs near the intake valve, which may deteriorate the combustion efficiency. As a countermeasure, a method of directly injecting fuel into a cylinder is being studied in order to improve combustion efficiency even in a gasoline engine. At present, a method is mainly used in which a sub combustion chamber is provided and fuel is supplied by an electromagnetic fuel injection valve or the like.
【０００４】本発明の目的は、インテークバルブと燃料
噴射装置を一体化することにより、直接気筒内に燃料を
供給し燃焼効率を向上させ、エンジン本体の小型軽量
化，部品点数削減に寄与する燃料噴射装置を提供するこ
とにある。An object of the present invention is to integrate an intake valve and a fuel injection device to supply fuel directly into a cylinder to improve combustion efficiency, which contributes to reduction in size and weight of an engine body and reduction in the number of parts. An object is to provide an injection device.
【０００５】[0005]
【課題を解決するための手段】インテークマニホールド
に装着されていた燃料噴射装置の代替えとして、インテ
ークバルブ内に燃料通路と固定弁を設け、インテークバ
ルブの開閉により燃料の供給停止を行い、噴射量を燃料
通路形状、または燃料供給圧力により調整することで、
エンジン本体の小型軽量化，部品点数の削減を特徴とす
る。As an alternative to the fuel injection device mounted on the intake manifold, a fuel passage and a fixed valve are provided in the intake valve, and the fuel supply is stopped by opening and closing the intake valve to reduce the injection amount. By adjusting the fuel passage shape or fuel supply pressure,
It features a compact and lightweight engine body and a reduced number of parts.
【０００６】[0006]
【作用】燃料噴射装置をインテークバルブと一体化する
ことで気筒内に燃料を直接噴射することが可能となり、
燃料供給のタイミングが気筒内に空気を吸入するタイミ
ングと同調している為、燃料の拡散を促進することがで
き、燃焼効率を向上することができる。また、従来の筒
内噴射装置のように副燃焼室や噴射装置の設置部を必要
とせず、エンジン本体を小型化することができるので、
エンジンの軽量化，部品点数削減を行うことができる。[Operation] By integrating the fuel injection device with the intake valve, it becomes possible to inject fuel directly into the cylinder,
Since the timing of fuel supply is synchronized with the timing of sucking air into the cylinder, diffusion of fuel can be promoted and combustion efficiency can be improved. Further, unlike the conventional in-cylinder injector, it is not necessary to install the auxiliary combustion chamber and the injector, and the engine body can be downsized.
It is possible to reduce the weight of the engine and the number of parts.
【０００７】[0007]
【実施例】以下、本発明の実施例を図１，図２および図
３を用いて説明する。Embodiments of the present invention will be described below with reference to FIGS. 1, 2 and 3.
【０００８】図１は本発明の特徴を最もよく表した燃料
噴射装置の縦断面図、図２は図１の燃料噴射状態の縦断
面図、図３は燃料供給部をインテークバルブに設け、イ
ンテークバルブ開閉をロッカーアームで行う場合の縦断
面図である。FIG. 1 is a vertical cross-sectional view of a fuel injection device that best represents the features of the present invention, FIG. 2 is a vertical cross-sectional view of the fuel injection state of FIG. 1, and FIG. 3 is a fuel supply portion provided on an intake valve. FIG. 6 is a vertical cross-sectional view when a valve is opened and closed by a rocker arm.
【０００９】本発明品は、従来燃焼室への通路の開閉弁
であるインテークバルブ２に燃料通路を設け、その通路
内に燃料の供給停止を行う為シリンダヘッド等に固定し
た固定弁１と、燃料が漏れないようにインテークバルブ
２と固定弁１の間に設けた軸シール３で形成する。ま
た、インテークバルブ２の開閉の為、カム６と連動させ
る。In the product of the present invention, a fuel passage is provided in an intake valve 2 which is a valve for opening and closing a passage to the conventional combustion chamber, and a fixed valve 1 fixed to a cylinder head or the like for stopping fuel supply in the passage, It is formed by a shaft seal 3 provided between the intake valve 2 and the fixed valve 1 so that fuel does not leak. Further, the intake valve 2 is opened and closed, and is interlocked with the cam 6.
【００１０】図１で噴射装置は、図示しない燃料ポン
プ，プレッシャーレギュレータ等から燃料入口８に燃料
が送られ、固定弁１内の燃料通路を通りインテークバル
ブ２の内部に満たされる。停止時は固定弁１によりイン
テークバルブ２の燃料通路を塞ぎ、燃料供給を行わな
い。In the injector shown in FIG. 1, fuel is sent to a fuel inlet 8 from a fuel pump, a pressure regulator or the like (not shown), passes through a fuel passage in the fixed valve 1 and is filled in the intake valve 2. When stopped, the fixed valve 1 closes the fuel passage of the intake valve 2 so that fuel is not supplied.
【００１１】図２は燃料供給時の燃料噴射装置の縦断面
図を示す。エンジン運転時、カム６が回転することによ
りインテークバルブ２は下方へ押し下げられ燃料通路が
開き、空気を気筒内に吸入する際、燃料供給圧力と吸入
負圧により燃料噴射口９より燃料がエンジンシリンダ内
に直接噴射される。FIG. 2 is a vertical cross-sectional view of the fuel injection device when fuel is supplied. When the engine is operating, the intake valve 2 is pushed downward by the rotation of the cam 6 to open the fuel passage, and when air is sucked into the cylinder, fuel is supplied from the fuel injection port 9 due to the fuel supply pressure and the suction negative pressure. It is directly injected into.
【００１２】図１，図２に示すように、燃料をエンジン
の気筒内に直接供給することができるので、従来のエン
ジン構造のようにインテークマニホールドの壁面に燃料
が付着することもなく燃料の拡散を促進することができ
るので、燃焼効率を向上させ、ＮＯｘやＨＣ等の大気汚
染物質の排出量を減少することができる。また、カムを
利用し、インテークバルブの開閉タイミングと同調させ
ていることから供給燃料の制御方法を簡略化することが
できる。As shown in FIGS. 1 and 2, the fuel can be directly supplied into the cylinder of the engine. Therefore, unlike the conventional engine structure, the fuel does not adhere to the wall surface of the intake manifold and the fuel diffuses. Therefore, the combustion efficiency can be improved and the emission amount of air pollutants such as NOx and HC can be reduced. Further, since the cam is used and synchronized with the opening / closing timing of the intake valve, the method of controlling the supplied fuel can be simplified.
【００１３】図３は図１に対し、燃料入口８をインテー
クバルブ２に設け、ロッカーアーム１０によりインテー
クバルブ２を開閉させる場合を示す。FIG. 3 shows a case where the fuel inlet 8 is provided in the intake valve 2 and the intake valve 2 is opened and closed by a rocker arm 10 as compared with FIG.
【００１４】[0014]
【発明の効果】燃料噴射装置をインテークバルブと一体
化することにより、燃料を直接気筒内に噴射することを
可能とし、インテークバルブの開閉タイミングと燃料供
給のタイミングを同調させることにより吸入空気と燃料
を混合させられるので、燃焼効率を上げることができ
る。また、インテークバルブと一体化することで従来イ
ンテークマニホールド等に設けていた燃料噴射装置を廃
止することができ、エンジン本体の小型軽量化，部品点
数削減に貢献できる燃料噴射装置を提供することができ
る。By integrating the fuel injection device with the intake valve, the fuel can be directly injected into the cylinder, and the intake air and the fuel can be injected by synchronizing the opening / closing timing of the intake valve with the fuel supply timing. As a result, the combustion efficiency can be increased. Further, by integrating with the intake valve, the fuel injection device conventionally provided in the intake manifold or the like can be eliminated, and it is possible to provide a fuel injection device that can contribute to downsizing and weight reduction of the engine body and reduction of the number of parts. .
【図１】本発明の燃料噴射装置の縦断面図。FIG. 1 is a vertical sectional view of a fuel injection device of the present invention.
【図２】図１の燃料供給状態の縦断面図。FIG. 2 is a vertical sectional view of the fuel supply state of FIG.
【図３】図１に対し燃料入口を変更し、ロッカーアーム
を用いた燃料噴射装置の縦断面図。FIG. 3 is a vertical cross-sectional view of a fuel injection device using a rocker arm in which the fuel inlet is changed from that of FIG.
１…固定弁、２…インテークバルブ、３…軸シール、４
…スプリング、５…固定支、６…カム、７…シリンダヘ
ッド、８…燃料入口、９…燃料噴射口、１０…ロッカー
アーム。1 ... Fixed valve, 2 ... Intake valve, 3 ... Shaft seal, 4
... Spring, 5 ... Fixed support, 6 ... Cam, 7 ... Cylinder head, 8 ... Fuel inlet, 9 ... Fuel injection port, 10 ... Rocker arm.
Claims (4)
料噴射装置において、燃料通路をインテ−クバルブの内
部に設けたことを特徴とする燃料噴射装置。1. A fuel injection device for directly injecting fuel into a cylinder of an engine, wherein a fuel passage is provided inside an intake valve.
を前記インテークバルブの開閉タイミングと同調させた
燃料噴射装置。2. The fuel injection device according to claim 1, wherein the fuel injection timing is synchronized with the opening / closing timing of the intake valve.
内に前記燃料通路を断続する弁を設け、前記インテーク
バルブの開閉のタイミングにより燃料の供給停止のタイ
ミングを決定する燃料噴射装置。3. The fuel injection device according to claim 1, wherein a valve that connects and disconnects the fuel passage is provided in the intake valve, and the timing of stopping the supply of fuel is determined by the timing of opening and closing the intake valve.
通路形状、または燃料供給圧力によって行う燃料噴射装
置。4. The fuel injection device according to claim 1, wherein the injection amount is adjusted by the shape of the fuel passage or the fuel supply pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29089894A JPH08144890A (en) | 1994-11-25 | 1994-11-25 | Fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29089894A JPH08144890A (en) | 1994-11-25 | 1994-11-25 | Fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08144890A true JPH08144890A (en) | 1996-06-04 |
Family
ID=17761941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29089894A Pending JPH08144890A (en) | 1994-11-25 | 1994-11-25 | Fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08144890A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030090835A (en) * | 2002-05-22 | 2003-12-01 | 현대자동차주식회사 | a fuel injection structure of engine for vehicles |
| KR100412596B1 (en) * | 2001-07-12 | 2003-12-31 | 현대자동차주식회사 | Intake valve having injector |
| KR100482072B1 (en) * | 2002-05-29 | 2005-04-13 | 현대자동차주식회사 | reduction device of engine pumping loss for vehicle |
| KR100521533B1 (en) * | 2003-11-07 | 2005-10-12 | 현대자동차주식회사 | Fuel injecting apparatus of engine |
-
1994
- 1994-11-25 JP JP29089894A patent/JPH08144890A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100412596B1 (en) * | 2001-07-12 | 2003-12-31 | 현대자동차주식회사 | Intake valve having injector |
| KR20030090835A (en) * | 2002-05-22 | 2003-12-01 | 현대자동차주식회사 | a fuel injection structure of engine for vehicles |
| KR100482072B1 (en) * | 2002-05-29 | 2005-04-13 | 현대자동차주식회사 | reduction device of engine pumping loss for vehicle |
| KR100521533B1 (en) * | 2003-11-07 | 2005-10-12 | 현대자동차주식회사 | Fuel injecting apparatus of engine |
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