JPH0631586B2 - Fuel injection device for multi-intake valve internal combustion engine - Google Patents
Fuel injection device for multi-intake valve internal combustion engineInfo
- Publication number
- JPH0631586B2 JPH0631586B2 JP61299928A JP29992886A JPH0631586B2 JP H0631586 B2 JPH0631586 B2 JP H0631586B2 JP 61299928 A JP61299928 A JP 61299928A JP 29992886 A JP29992886 A JP 29992886A JP H0631586 B2 JPH0631586 B2 JP H0631586B2
- Authority
- JP
- Japan
- Prior art keywords
- intake
- valve
- intake valve
- lift
- 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.)
- Expired - Fee Related
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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/1826—Discharge orifices having different sizes
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、主として自動車に搭載する内燃機関の燃料噴
射装置の改良に関する。Description: TECHNICAL FIELD The present invention mainly relates to improvement of a fuel injection device for an internal combustion engine mounted on an automobile.
（従来の技術） 各気筒ごとに点火栓に近い吸気弁と遠い吸気弁を設け、
吸気通路内において吸気弁口の近くに隔壁を設けて各吸
気弁口に連通する分岐吸気路を形成し、一つの噴口をも
つ燃料噴射弁を、前記隔壁の上流側において点火栓に近
い吸気弁に偏らせて設置し、これにより点火栓付近に濃
混合気を供給して着火性を向上させるようにした燃料噴
射装置は、特開昭60-111021号により公知である。(Prior Art) An intake valve near the spark plug and an intake valve far from the spark plug are provided for each cylinder.
In the intake passage, a partition wall is provided near the intake valve opening to form a branch intake passage communicating with each intake valve opening, and a fuel injection valve having one injection port is provided near the spark plug on the upstream side of the partition wall. JP-A-60-111021 discloses a fuel injection device which is installed in such a manner that it is biased to the above position, thereby supplying a rich air-fuel mixture near the spark plug to improve the ignitability.
また、燃焼室に点火プラグに近い吸気弁と遠い吸気弁を
設け、吸気通路に大噴口と小噴口をもつ燃料噴射弁を設
け、点火プラグに近い吸気弁側の分岐吸気路に大噴口側
を臨ませ、点火プラグ付近に濃混合気を供給して着火性
を向上させた燃料噴射装置は、特開昭61-247865号によ
り公知である。In addition, an intake valve near the spark plug and an intake valve far from the spark plug are installed, a fuel injection valve with a large injection port and a small injection port is installed in the intake passage, and the large injection port side is installed in the branch intake passage on the intake valve side near the ignition plug. A fuel injection device which is exposed to a rich air-fuel mixture in the vicinity of an ignition plug to improve ignitability is known from Japanese Patent Laid-Open No. 61-247865.
また、複数の吸気弁のうちの一つを休止に至るまで開弁
特性を変更するものも知られている。Further, there is also known one in which the valve opening characteristic is changed until one of the plurality of intake valves is stopped.
（発明が解決しようとする問題点） 前記の各公開公報に記載されたものに対して、吸気弁の
一つをリフト変更可能とする技術を単に適用すると、リ
フト変更吸気弁を休止したときも、休止側の分岐吸気路
を混合気の一部が横切ると、該分岐吸気路を向く噴口を
強制的に遮断する手段が設けられていないこと、などか
ら休止側の分岐吸気路に燃料が付着又は蓄積するおそれ
がある。(Problems to be Solved by the Invention) By simply applying the technology that makes it possible to change the lift of one of the intake valves to the one described in each of the above-mentioned publications, even when the lift change intake valve is stopped. , When a part of the air-fuel mixture crosses the branch intake passage on the rest side, there is no means to forcibly shut off the injection port facing the branch intake passage. Or it may accumulate.
そして、休止を解除したとき該燃料がシリンダ中に一時
に吸入され、混合気が過濃になる不都合がある。Then, when the suspension is released, the fuel is sucked into the cylinder at one time, and there is a disadvantage that the air-fuel mixture becomes excessively rich.
（問題点を解決するための手段） 本発明は、リフト変更吸気弁の休止時に、該吸気弁の分
岐吸気路や吸気弁上面に燃料が付着又は蓄積するのを防
止し、これにより、リフト変更を解除した時に蓄積した
燃料が一時に流れて過濃になるのを防止するのであり、
その手段は、気筒ごとに一つの吸気通路と、その下流側
で該吸気通路を流通方向の隔壁で仕切って形成した複数
の分岐吸気路と、燃焼室で各分岐吸気路を開閉する複数
の吸気弁とを備え、隔壁の上流側に燃料噴射弁を設置し
た多吸気弁式内燃機関の燃料噴射装置において、複数の
吸気弁の少なくとも一つを、弁休止に近い微小リフトと
通常リフトに変更できるリフト変更吸気弁とし、他の吸
気弁を通常リフトの吸気弁とし、燃料噴射弁に各分岐吸
気路に臨む複数の噴口を隔離して設け、かつ前記リフト
変更吸気弁に臨む噴口の大きさを、通常リフトの吸気弁
を向く噴口よりも小さくしたことを特徴とする。(Means for Solving the Problems) The present invention prevents fuel from adhering to or accumulating on the branch intake passage of the intake valve or the upper surface of the intake valve when the lift change intake valve is at rest, thereby changing the lift. It is to prevent the accumulated fuel from flowing at one time when it is released and becoming rich.
The means is one intake passage for each cylinder, a plurality of branch intake passages formed by partitioning the intake passage by partition walls in the flow direction on the downstream side, and a plurality of intake passages that open and close each branch intake passage in the combustion chamber. In a fuel injection device of a multi-intake valve type internal combustion engine having a valve and a fuel injection valve installed on the upstream side of a partition wall, at least one of the plurality of intake valves can be changed to a small lift close to a valve rest and a normal lift. It is a lift change intake valve, the other intake valves are normal lift intake valves, the fuel injection valve is provided with a plurality of injection ports facing each branch intake passage, and the size of the injection port facing the lift change intake valve is set. It is characterized in that it is smaller than the injection port facing the intake valve of a normal lift.
（作 用） 前記手段により、リフト変更吸気弁のリフトを最低に制
限して略休止状態にしても、必ず少量の吸気は吸入され
るから、吸気中の燃料は、分岐吸気路や吸気弁上面に付
着することが防止され、吸気と共に燃焼室に吸入され
る。したがってリフト変更を解除しても過濃現象は生じ
ない。(Operation) Even if the lift of the lift change intake valve is limited to the minimum by the above means and a substantially rest state is taken, a small amount of intake air is always taken in. Is adhered to the combustion chamber and is sucked into the combustion chamber together with the intake air. Therefore, even if the lift change is canceled, the over-concentration phenomenon does not occur.
（実施例） 次に本発明の実施例を図面によって説明する。(Example) Next, the Example of this invention is described by drawing.
第１図、第２図において、(1) は気筒、(2) はシリンダ
ヘッド、(3) は吸気管で、一つの気筒(1) について２個
の吸気弁(4),(5) がシリンダヘッド(2) に装着してあ
り、一方の吸気弁(5)が、通常のリフト量と休止に近い
微小リフト量とに変更されるリフト変更吸気弁であり、
他方の吸気弁(4) が通常リフトの吸気弁である。In Figs. 1 and 2, (1) is a cylinder, (2) is a cylinder head, (3) is an intake pipe, and two intake valves (4) and (5) are provided for one cylinder (1). It is mounted on the cylinder head (2), and one intake valve (5) is a lift change intake valve that is changed to a normal lift amount and a minute lift amount close to a pause,
The other intake valve (4) is a normal lift intake valve.
シリンダヘッド(2) の吸気ポート(6) と吸気管(3) によ
って吸気通路(7) を形成し、この吸気通路(7) の吸気弁
(4),(5) 寄りの部分に、該吸気通路(7) を通気方向に沿
って２分する隔壁(8) を設け、これによって二つの分岐
吸気路(3),(10)を形成して吸気通路(7) を通る空気を吸
気弁(4),(5) に分流させる。The intake passage (7) is formed by the intake port (6) of the cylinder head (2) and the intake pipe (3), and the intake valve of this intake passage (7) is formed.
A partition wall (8) that divides the intake passage (7) into two along the ventilation direction is provided near the portions (4) and (5), thereby forming two branch intake passages (3) and (10). Then, the air passing through the intake passage (7) is diverted to the intake valves (4) and (5).
吸気管(3) の上部に、吸気弁を向く燃料噴射弁(11)が取
付けてあり、この噴射弁(11)は第３図に示す構成を備え
る。同図において(12)はノズルで、大小二つの噴口(1
3),(14)を備えており、このノズル(12)に、弁体(15)を
収容した弁室(16)と、電磁コイル(17)を収容しかつ燃料
管(18)を取付けた電磁石ケース(19)とを、ハウジング(2
0)によってかしめ結合している。図中(21)は弁体(15)に
よって開閉される弁座、(22)は弁体(15)を弁座(21)に向
けて加圧して該弁座を閉鎖するばねであり、電磁石(17)
が励磁されたときは、弁体(15)はばね(22)を圧縮して後
退し弁座(21)を開放する。A fuel injection valve (11) facing the intake valve is attached to the upper part of the intake pipe (3), and this injection valve (11) has the structure shown in FIG. In the figure, (12) is a nozzle, and two large and small nozzles (1
3) and (14) are provided, the valve chamber (16) accommodating the valve body (15) and the electromagnetic coil (17) are accommodated in the nozzle (12), and the fuel pipe (18) is attached. Install the electromagnetic case (19) and the housing (2
It is caulked by (0). In the figure, (21) is a valve seat that is opened and closed by the valve body (15), (22) is a spring that pressurizes the valve body (15) toward the valve seat (21) and closes the valve seat, and an electromagnet. (17)
When is excited, the valve body (15) compresses the spring (22) and retracts to open the valve seat (21).
ノズル(21)に設けた噴口のうち、大噴口(13)は分岐吸気
路(9) を指向し、小噴口(14)は分岐吸気路(10)を指向し
ており、両噴口からは噴霧Ｓ１及びＳ２が吸気路壁面に
接触しない噴射角θ１、θ２をもって角吸気弁の方向に
噴射される。両噴口(13),(14) をこのように設定するこ
とにより、燃料が分岐吸気路(9),(10)に多量に付着する
ことが防止され、また小噴口(14)をリフト変更吸気弁
(5) 側としたことにより、リフト変更時の燃焼状態又は
出力の急変が避けられる。Of the nozzles provided in the nozzle (21), the large nozzle (13) points to the branch intake passage (9), and the small nozzle (14) points to the branch intake passage (10). S 1 and S 2 are injected in the direction of the angular intake valve with injection angles θ 1 and θ 2 that do not contact the wall surface of the intake passage. By setting both nozzles (13) and (14) in this way, it is possible to prevent a large amount of fuel from adhering to the branch intake passages (9) and (10), and to lift the small nozzles (14) by changing the lift intake air. valve
By adopting the (5) side, it is possible to avoid a sudden change in the combustion state or output when changing the lift.
そして、通常運転時は吸気弁(4) とリフト変更吸気弁
(5) は同様の開閉運動を行うが、リフト変更時にリフト
変更吸気弁(5) は、例えば0.4 〜1.0mm 程度に設定され
た微小のリフトの開閉運動を行い、このときの吸気量
は、エンジン出力に寄与しない程度の僅かの量とされ、
リフト変更吸気弁(5) は、実質上休止の状態となる。During normal operation, the intake valve (4) and lift change intake valve
(5) performs the same opening and closing motion, but when changing the lift, the lift change intake valve (5) performs the opening and closing motion of a minute lift set to, for example, 0.4 to 1.0 mm, and the intake amount at this time is It is a small amount that does not contribute to the engine output,
The lift change intake valve (5) is substantially in a rest state.
しかし、僅かでも混合気が流れるから、適正な空燃比が
得られ、かつ小噴口(14)から噴出する微量の燃料は又は
混合気中の燃料が、リフト変更吸気弁(5) 又は分岐吸気
路(10)に多量に付着したり蓄積することは防止され、リ
フト変更解除時に余分の燃料が吸入燃焼室にされること
もないから、燃焼室内が過濃になることもない。However, even a small amount of air-fuel mixture flows, so an appropriate air-fuel ratio can be obtained, and a small amount of fuel ejected from the small injection port (14) or the fuel in the air-fuel mixture is lifted by the lift change intake valve (5) or the branch intake passage. Accumulation or accumulation of a large amount on (10) is prevented, and since excess fuel is not made into the intake combustion chamber when the lift change is released, the combustion chamber does not become rich.
（発明の効果） 以上のように本発明は、燃料噴射弁の小噴口側にリフト
変更吸気弁を設けたから、該吸気弁を実質上休止状態に
するリフト変更時に、燃焼状態が急変せず出力が円滑に
変化し、また、このリフト変更時にリフト変更吸気弁を
微小のリフトで作動させるから、微小量の吸気は続行さ
れ、リフト変更吸気弁側に燃料の付着するのが防止さ
れ、付着燃料の吸入による過濃燃焼が生じるのを防止で
きるすぐれた効果を奏する。(Effects of the Invention) As described above, according to the present invention, since the lift change intake valve is provided on the small injection port side of the fuel injection valve, the combustion state does not change suddenly when the lift change is performed to put the intake valve into the substantially idle state, and the output is output. Changes smoothly, and when the lift is changed, the lift change intake valve is operated with a small lift, so that a small amount of intake air is continued, fuel is prevented from adhering to the lift change intake valve side, and the adhered fuel It has an excellent effect of preventing the excessive combustion due to the inhalation of.
図面は本発明の実施例を示し、第１図は第２図をＩ−Ｉ
線で截断した平面図、第２図は第１図のII−II線断面
図、第３図(a)は燃料噴射弁の縦断面図、同図(b) はノ
ズルの正面図である。 (4) ……吸気弁 (5) ……リフト変更吸気弁 (9),(10)……分岐吸気路 (13)……大噴口 (14)……小噴口The drawings show an embodiment of the present invention, and FIG. 1 shows FIG.
FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 (a) is a vertical sectional view of the fuel injection valve, and FIG. 3 (b) is a front view of the nozzle. (4) …… Intake valve (5) …… Change lift intake valve (9), (10) …… Branch intake passage (13) …… Large nozzle (14) …… Small nozzle
Claims (1)
で該吸気通路を流通方向の隔壁で仕切って形成した複数
の分岐吸気路と、燃焼室で各分岐吸気路を開閉する複数
の吸気弁とを備え、隔壁の上流側に燃料噴射弁を設置し
た多吸気弁式内燃機関の燃料噴射装置において、複数の
吸気弁の少なくとも一つを、弁休止に近い微小リフトと
通常リフトに変更できるリフト変更吸気弁とし、他の吸
気弁を通常リフトの吸気弁とし、燃料噴射弁に各分岐吸
気路に臨む複数の噴口を隔離して設け、かつ前記リフト
変更吸気弁側に臨む噴口の大きさを、通常リフトの吸気
弁を向く噴口よりも小さくしたことを特徴とする、多吸
気弁式内燃機関の燃料噴射装置。1. An intake passage for each cylinder, a plurality of branch intake passages formed on the downstream side of the intake passage by partitioning the intake passage by partition walls in the flow direction, and a plurality of combustion chambers for opening and closing the respective branch intake passages. In a fuel injection device for a multi-intake valve type internal combustion engine having an intake valve and a fuel injection valve installed on the upstream side of a partition wall, at least one of the plurality of intake valves is changed to a small lift close to a valve rest and a normal lift. Of the lift change intake valve, the other intake valve as a normal lift intake valve, the fuel injection valve is provided with a plurality of injection ports facing each branch intake passage, and the size of the injection port facing the lift change intake valve side A fuel injection device for a multi-intake valve internal combustion engine, characterized in that the size is smaller than that of an injection port facing an intake valve of a normal lift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61299928A JPH0631586B2 (en) | 1986-12-18 | 1986-12-18 | Fuel injection device for multi-intake valve internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61299928A JPH0631586B2 (en) | 1986-12-18 | 1986-12-18 | Fuel injection device for multi-intake valve internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63154859A JPS63154859A (en) | 1988-06-28 |
| JPH0631586B2 true JPH0631586B2 (en) | 1994-04-27 |
Family
ID=17878620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61299928A Expired - Fee Related JPH0631586B2 (en) | 1986-12-18 | 1986-12-18 | Fuel injection device for multi-intake valve internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0631586B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2759334B2 (en) * | 1989-02-23 | 1998-05-28 | マツダ株式会社 | Intake port structure of fuel injection engine |
| JP2760115B2 (en) * | 1989-12-14 | 1998-05-28 | 三菱自動車工業株式会社 | Fuel injection device and stratified combustion internal combustion engine with fuel injection device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60111021A (en) * | 1983-11-18 | 1985-06-17 | Honda Motor Co Ltd | Three-valve type internal-combustion engine with fuel injection device |
| JPH06100161B2 (en) * | 1985-04-25 | 1994-12-12 | マツダ株式会社 | Fuel injection engine |
-
1986
- 1986-12-18 JP JP61299928A patent/JPH0631586B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63154859A (en) | 1988-06-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5062395A (en) | Two-stroke internal combustion engine | |
| JPS62162723A (en) | Air intake device for multi-cylinder engine | |
| US20090235890A1 (en) | Intake control device for an engine | |
| JP3847558B2 (en) | Fuel injection device for internal combustion engine | |
| JPH0631586B2 (en) | Fuel injection device for multi-intake valve internal combustion engine | |
| US5651344A (en) | Induction and injection system for multi-valve engine | |
| JP4252670B2 (en) | Engine intake passage structure | |
| JPS60219454A (en) | Fuel injector for engine | |
| JPH09317476A (en) | Cylinder fuel injection type engine | |
| JP2890972B2 (en) | Fuel injection device for internal combustion engine | |
| EP0953761B1 (en) | Internal combustion engine with auxiliary intake passage | |
| JP2976601B2 (en) | Intake system for fuel injection type internal combustion engine | |
| JPH0693941A (en) | Fuel feeding device for internal combustion engine | |
| JPS614821A (en) | Intake device for internal-combustion engine | |
| JP2576905B2 (en) | Intake device for 4-cycle internal combustion engine | |
| JPH0217687B2 (en) | ||
| JP2523564Y2 (en) | Intake device for internal combustion engine | |
| JP2519563Y2 (en) | Internal combustion engine intake system | |
| JPH0738665U (en) | Engine intake system | |
| KR0134202Y1 (en) | Injector for dual intake system | |
| JPH0481522A (en) | Intake device of engine | |
| JPH0465232B2 (en) | ||
| JP2561190B2 (en) | Internal combustion engine intake system | |
| JPH036854Y2 (en) | ||
| JPH0444847Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |