JPS6065225A - Ignition device of internal-combustion engine - Google Patents
Ignition device of internal-combustion engineInfo
- Publication number
- JPS6065225A JPS6065225A JP17208083A JP17208083A JPS6065225A JP S6065225 A JPS6065225 A JP S6065225A JP 17208083 A JP17208083 A JP 17208083A JP 17208083 A JP17208083 A JP 17208083A JP S6065225 A JPS6065225 A JP S6065225A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- electrode
- ignition
- discharge
- 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.)
- 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
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/06—Fuel-injectors combined or associated with other devices the devices being sparking plugs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/46—Sparking plugs having two or more spark gaps
- H01T13/462—Sparking plugs having two or more spark gaps in series connection
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
く技術分野〉
本発明は燃料噴射弁によシ燃料を燃焼室内に供給する内
燃機関における点火装置に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an ignition device for an internal combustion engine that supplies fuel into a combustion chamber through a fuel injection valve.
〈従来技術〉
従来の圧縮着火式内燃機関に点火装置を備えたものとし
ては、例えば第１図に示すようなものがある（昭和５５
年小松技報第２６巻第４号参照）。<Prior art> An example of a conventional compression ignition internal combustion engine equipped with an ignition device is the one shown in Fig. 1 (1971).
(See Komatsu Technical Report, Vol. 26, No. 4).
これについて説明を行なうと、シリンダヘッド１とピス
トン２との間に形成された主燃焼室３の上部に渦流室４
が形成されており、この渦流室４には燃料噴射弁５の噴
口６を臨ませである。To explain this, there is a swirl chamber 4 in the upper part of the main combustion chamber 3 formed between the cylinder head 1 and the piston 2.
is formed, and the nozzle 6 of the fuel injection valve 5 faces the swirl chamber 4.
→＋ 繰鋭晴Ｉ瀬ｔｒｈ渦焙索４内へ嗜社虞れる噴霧流
中に点火栓７の先端部分が位置するように、渦流室４の
側方の通常のグロープラグ位置またはその近辺から点火
栓７が挿入配置されている。→+ From the normal glow plug position on the side of the vortex chamber 4 or its vicinity so that the tip of the ignition plug 7 is located in the spray flow that may flow into the vortex chamber 4. A spark plug 7 is inserted and arranged.
そして、機関の圧縮行程時に渦流室４内に押し込み渦流
を起こさせ、燃料噴射弁５よシ噴射された燃料をこの渦
流によって高温高圧の空気と良く混合させて燃焼させる
ものである。点火栓７による放電は、燃料噴射弁５よシ
の燃料噴霧が点火栓７先端部を通過する時期に合わせて
行ない、放電箇所は１箇所のみである。During the compression stroke of the engine, the fuel is pushed into the vortex chamber 4 to generate a vortex, and the vortex causes the fuel injected through the fuel injection valve 5 to mix well with high-temperature, high-pressure air and burn. The discharge by the spark plug 7 is performed at the timing when the fuel spray from the fuel injection valve 5 passes the tip of the spark plug 7, and there is only one discharge point.
しかしながら、このよ□うな従来の圧縮着火式内燃機関
の点火装置にあっては、点火栓７の先端部分が燃料噴射
弁５の噴口６から遠く離れておシ、かつ放電箇所が１箇
所のみであるので、以下のような問題点があった。However, in such a conventional ignition system for a compression ignition internal combustion engine, the tip of the spark plug 7 is far away from the nozzle 6 of the fuel injector 5, and there is only one discharge point. Therefore, there were the following problems.
その第１は、燃料噴霧の通過と放電時期を同期させるこ
とが困難であ′るという問題点、第２は燃料噴射弁５の
劣化摩耗によシ噴霧の方向、噴射時期等に狂いを生じ放
電の位置、時期とのずれを生じるという問題点、第３は
点火栓７の先端部分に噴霧が到達するまでにかなシの量
の燃料が噴射され予混合燃焼割合が増し急激な燃焼を起
こすので、ディーゼル機関にあっては、機関回転数の低
いアイドリンク時にディーゼルノックを発生しやすいと
いう問題点があった。The first problem is that it is difficult to synchronize the passage of the fuel spray and the discharge timing, and the second problem is that due to deterioration and wear of the fuel injector 5, the direction of the spray, the injection timing, etc. become inconsistent. The third problem is that there is a difference in the position and timing of the discharge, and the third problem is that a large amount of fuel is injected before the spray reaches the tip of the spark plug 7, increasing the premix combustion ratio and causing rapid combustion. Therefore, diesel engines have a problem in that diesel knock is likely to occur during idling when the engine speed is low.
〈発明の目的〉
本発明はこのような従来の問題点に鑑み、複数個の燃料
点火用電極を燃料噴射弁の噴口に近接させて噴霧の通過
と放電時期を同期し易くシ、また、ディーゼル機関にあ
っては着火遅れ期間を短くして緩慢燃焼を起こさせアイ
ドリンク時等のディーゼルノックの発生を抑制し、さら
に燃料噴射弁の劣化摩耗の影響による放電の位置、時期
のずれを解消した点火装置を提供することを目的とする
。<Object of the Invention> In view of the above conventional problems, the present invention provides a system in which a plurality of fuel ignition electrodes are brought close to the nozzle of a fuel injector to facilitate synchronization of the passage of spray and discharge timing. For the engine, the ignition delay period has been shortened to cause slow combustion, suppressing diesel knock during idling, and also eliminating discrepancies in the position and timing of discharge caused by deterioration and wear of the fuel injectors. The purpose is to provide an ignition device.
〈発明の構成〉
このため本発明は、燃料点火用電極を、燃料噴射弁の噴
口近くであって該噴口と同軸であ夛かつ噴霧流の周囲に
、複数個設けたことによシ噴射直後の燃料に点火させ前
記目的を達成するようにしたものである。<Configuration of the Invention> For this reason, the present invention provides a plurality of fuel ignition electrodes near the nozzle of the fuel injection valve, coaxially with the nozzle, and around the spray stream, so that the electrodes can be used immediately after injection. The above objective is achieved by igniting the fuel.
〈実施例〉
以下本発明の一実施例の説明を第２図から第５図にわた
って行なう。尚、従来例と同一要素については第１図と
同一符号を附して説明を省略する。<Embodiment> An embodiment of the present invention will be described below with reference to FIGS. 2 to 5. Incidentally, the same elements as those in the conventional example are given the same reference numerals as in FIG. 1, and the explanation thereof will be omitted.
第２図において、渦流室４に臨む燃料噴射弁５火用電極
としての放電電極１２、燃料点火用電極であシ中間電極
でもある放電電極１３．１４及び燃料点火用電極であシ
接地電極でもある側方外部電極１５が周方向等間隔で配
設されている。In FIG. 2, a fuel injection valve 5 facing the swirl chamber 4 has a discharge electrode 12 as a fire electrode, a discharge electrode 13.14 which is both a fuel ignition electrode and an intermediate electrode, and a fuel ignition electrode and a ground electrode. Certain lateral external electrodes 15 are arranged at equal intervals in the circumferential direction.
さて、第２図に戻って放電電極１２の外端に端子が接触
した状態で高電圧印加電極としての電流流入電極９が配
設されている。また、１０は高圧コードである。Now, returning to FIG. 2, the current inflow electrode 9 as a high voltage application electrode is disposed with its terminal in contact with the outer end of the discharge electrode 12. Further, 10 is a high voltage cord.
第２図から第５図において、本体１１はリング状の絶縁
体からなシ中央部に燃料噴霧通過用の貫通孔１１ａが形
成されである。そして、該貫通孔１１ａが燃料噴射弁５
の噴口６と同軸に、かつ、近くに位置するように本体１
１がシリンダヘッド１内に配設されている。In FIGS. 2 to 5, the main body 11 is made of a ring-shaped insulator and has a through hole 11a formed in the center thereof for passage of fuel spray. The through hole 11a is connected to the fuel injection valve 5.
The main body 1 is positioned coaxially with and close to the nozzle 6 of the
1 is disposed within the cylinder head 1.
放電電極１２，１３．１４及び側方外部電極１５はそれ
ぞれその基端部が本体１１に埋設されておシ、先端部は
、本体１１の内周面１１ｂに沿いそれぞれ等間隔の放電
空間１６を形成する形でそれぞれ延設している。放電電
極１２の基端部外端には電流流入電極９の端子との接触
面１７が形成される。側方外部電極１５０基端部は本体
１１の外周に沿いシリンダヘッド１に接触しアースする
ようになっている。The base ends of the discharge electrodes 12, 13, 14 and the side external electrodes 15 are embedded in the main body 11, and the distal ends thereof define discharge spaces 16 at equal intervals along the inner circumferential surface 11b of the main body 11. Each of them is extended in the form of a formation. A contact surface 17 with a terminal of the current inflow electrode 9 is formed at the outer end of the base end of the discharge electrode 12 . The base end of the side external electrode 150 is arranged along the outer periphery of the main body 11 to contact the cylinder head 1 and to be grounded.
以上の構成によシ、燃料点火用電極としての放電電極１
２，１３．１４側方外部電極１５が燃料噴射弁５の噴口
６の近くに、かつ、同軸同一円周上に４等分に均等に設
けられ、それによシ等間隔のシリーズギャップとなる放
電空間１Ｂが形成されることになる。According to the above configuration, the discharge electrode 1 serves as a fuel ignition electrode.
2.13.14 The side external electrodes 15 are provided near the nozzle 6 of the fuel injection valve 5 and equally spaced into four on the same axis and on the same circumference, thereby creating a series gap at equal intervals. A space 1B will be formed.
次に本実施例の一連の作用を説明する。Next, a series of operations of this embodiment will be explained.
点火装置内で発生した高圧電流は点火コイルから高圧コ
ード１０を経由し電流流入電極Ｓを通シての放電電極１
２よシー極側としての側方外部電極１５へとシリーズギ
ャップを形成する放電空間１６で順次放電し火花を発生
する。The high-voltage current generated in the ignition device is passed from the ignition coil via the high-voltage cord 10 to the discharge electrode 1 through the current inflow electrode S.
A discharge occurs sequentially in a discharge space 16 forming a series gap from 2 to the lateral external electrode 15 as the sea pole side, generating sparks.
また、燃料噴射弁５から噴射された燃料噴霧は順次液滴
から蒸発し噴霧の外周から巻き込まれた圧縮空気と混合
しなから噴霧の外周上に可燃混合気を形成する。この可
燃混合気の周囲に前記放電空間１６が形成されておシ、
放電は燃料噴霧がこの放電空間１６に接近した時期を狙
って行なうので燃料噴霧のほぼ先端部から燃焼が開始さ
れ、順次燃焼が拡大していく。Further, the fuel spray injected from the fuel injection valve 5 sequentially evaporates from the droplets and mixes with the compressed air drawn in from the outer periphery of the spray, thereby forming a combustible air-fuel mixture on the outer periphery of the spray. The discharge space 16 is formed around this combustible mixture, and
Since the discharge is carried out at the timing when the fuel spray approaches the discharge space 16, combustion starts almost from the tip of the fuel spray and gradually expands.
従って、燃料噴霧の通過と放電時期を同期させやすくな
るので着火遅れ期間中の燃料噴射量が減少し、以て、ア
イドリンク時、低速時等のディーゼルノックの発生を抑
制することができる。Therefore, it becomes easier to synchronize the passage of the fuel spray and the discharge timing, so the amount of fuel injection during the ignition delay period is reduced, thereby suppressing the occurrence of diesel knock during idling, low speed, etc.
また、燃料噴射弁５の劣化によυ噴霧の方向がずれても
噴霧の外周上に複数個の放電空間１６が形成されている
ので必ず火花と燃料噴霧とが接触し確実に燃料着火が行
なわれる。Furthermore, even if the direction of the υ spray deviates due to deterioration of the fuel injection valve 5, a plurality of discharge spaces 16 are formed on the outer periphery of the spray, so that the spark and the fuel spray always come into contact and the fuel is reliably ignited. It will be done.
貞ちに、２３９姐の午縮鎮により燃料を着女させるので
はないので低温始動性が向上し、圧縮比の低減による機
関重量の低減、燃費の向上及び低セタン価の燃料が使用
できるという効果が得られる。In addition, since the fuel is not supplied to the engine due to the 239-degree compression ratio, low-temperature starting performance is improved, engine weight is reduced by reducing the compression ratio, fuel efficiency is improved, and fuel with a low cetane number can be used. Effects can be obtained.
本実施例では燃料としてメタノール及びガソリンの使用
が可能であった。In this example, methanol and gasoline could be used as fuel.
尚、本実施例においては放電空間１６は３箇所形成され
であるが、これによらず複数個形成されていれば良い。In this embodiment, three discharge spaces 16 are formed, but a plurality of discharge spaces 16 may be formed.
電極の形状も噴霧の外周に放電空間１６が形成されるの
であれば本実施例の形状でなくても良い。The shape of the electrode does not have to be the shape of this embodiment as long as the discharge space 16 is formed around the outer periphery of the spray.
〈発明の効果〉
以上説明したように本発明では、燃料点火用電極を、燃
料噴射弁の噴口近くに該噴口と同軸にかつ噴霧流の周囲
に、複数個設けたことによシ、燃料噴籾の通過と放電の
時期を同期させやすくしたので着火遅れ期間中の燃料噴
射量が滅シ、燃焼騒音の発生を抑制することができる。<Effects of the Invention> As explained above, in the present invention, a plurality of fuel ignition electrodes are provided near the nozzle of the fuel injection valve, coaxially with the nozzle, and around the spray flow, thereby making it possible to improve fuel injection. Since the timing of passing of the rice grains and the timing of discharge are easily synchronized, the amount of fuel injection during the ignition delay period is reduced, and the generation of combustion noise can be suppressed.
また、燃料噴射弁の劣化によシ噴霧の方向がずれても確
実に燃料着火が行なわれる。Further, even if the direction of the spray is shifted due to deterioration of the fuel injection valve, fuel ignition is reliably performed.
さらに、強制点火するから低温始動性が向上し、圧縮比
の低減による機関重量の低減、燃費の向上及び低セタン
価の燃料が使用できるという効果が得られる。Furthermore, because of forced ignition, low-temperature startability is improved, engine weight is reduced by reducing the compression ratio, fuel efficiency is improved, and fuel with a low cetane number can be used.
第１図は従来の点火装置を示す縦断面図、第２図は本発
明の一実施例を示す縦断面図、第３図は同上実施例の概
略平面図、第４図は第３図の■−■断面図、第５図は第
４図のｖ−■断面図である。
５・・・燃料噴射弁 ６・・・噴口 ８・・・放電電極
部 ９・・・電流流入電極（高電圧印加電極）１２・・
・放電電極（燃料点火用電極） １３．１４・・・放電
電極（燃料点火用電極） １５・・・側方外部電極（燃
料点火用電極）
特許出願人 日産自動車株式会社
代理人弁理士笹 島 富二雄
第１図
第３図
第２図Fig. 1 is a longitudinal sectional view showing a conventional ignition device, Fig. 2 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 3 is a schematic plan view of the same embodiment, and Fig. 4 is the same as Fig. 3. 5 is a sectional view taken along v--■ in FIG. 4. 5...Fuel injection valve 6...Nozzle port 8...Discharge electrode part 9...Current inflow electrode (high voltage application electrode) 12...
・Discharge electrode (electrode for fuel ignition) 13.14...Discharge electrode (electrode for fuel ignition) 15...Side external electrode (electrode for fuel ignition) Patent applicant: Nissan Motor Co., Ltd. Representative Patent Attorney Sasashima Fujio Figure 1 Figure 3 Figure 2
Claims (1)
＊咳口と同軸であシかつ噴霧流の周囲に、複数個設けた
ことを特徴とする内燃機関の点火装置。Place the fuel ignition electrode near the fuel injection valve nozzle!
*An ignition device for an internal combustion engine characterized by a plurality of ignition devices installed coaxially with the cough opening and around the spray stream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17208083A JPS6065225A (en) | 1983-09-20 | 1983-09-20 | Ignition device of internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17208083A JPS6065225A (en) | 1983-09-20 | 1983-09-20 | Ignition device of internal-combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6065225A true JPS6065225A (en) | 1985-04-15 |
| JPH0148377B2 JPH0148377B2 (en) | 1989-10-19 |
Family
ID=15935160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17208083A Granted JPS6065225A (en) | 1983-09-20 | 1983-09-20 | Ignition device of internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6065225A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03110135U (en) * | 1990-02-28 | 1991-11-12 | ||
| WO2003083284A1 (en) * | 2002-03-28 | 2003-10-09 | Robert Bosch Gmbh | Combined fuel injection valve/ignition plug |
| WO2005113975A1 (en) * | 2004-05-18 | 2005-12-01 | Robert Bosch Gmbh | Fuel injection valve with an integrated igniting device |
| EP1657423A1 (en) * | 2004-11-15 | 2006-05-17 | Hitachi, Ltd. | Spark ignition device and internal combustion engine with the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57361A (en) * | 1980-06-03 | 1982-01-05 | Nissan Motor Co Ltd | Igniter in internal combustion engine |
-
1983
- 1983-09-20 JP JP17208083A patent/JPS6065225A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57361A (en) * | 1980-06-03 | 1982-01-05 | Nissan Motor Co Ltd | Igniter in internal combustion engine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03110135U (en) * | 1990-02-28 | 1991-11-12 | ||
| WO2003083284A1 (en) * | 2002-03-28 | 2003-10-09 | Robert Bosch Gmbh | Combined fuel injection valve/ignition plug |
| WO2005113975A1 (en) * | 2004-05-18 | 2005-12-01 | Robert Bosch Gmbh | Fuel injection valve with an integrated igniting device |
| EP1657423A1 (en) * | 2004-11-15 | 2006-05-17 | Hitachi, Ltd. | Spark ignition device and internal combustion engine with the same |
| JP2006140072A (en) * | 2004-11-15 | 2006-06-01 | Hitachi Ltd | Spark ignition device of internal combustion engine, and internal combustion engine equipped with the same |
| US7228840B2 (en) | 2004-11-15 | 2007-06-12 | Hitachi, Ltd. | Spark ignition device and internal combustion engine with the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0148377B2 (en) | 1989-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20190376441A1 (en) | Pre-Chamber Spark Plug | |
| JP7413746B2 (en) | Spark plug for internal combustion engine and internal combustion engine equipped with the same | |
| EP1657423A1 (en) | Spark ignition device and internal combustion engine with the same | |
| JPH07174059A (en) | High-pressure fuel injector aggregate | |
| JPH11132135A (en) | Operation method of direct injection type gasoline internal combustion engine | |
| JPH0579331A (en) | Air compression and valve operating type internal combustion engine | |
| US7165528B2 (en) | Two-valve high squish flow I.C. engine | |
| JPH11514717A (en) | Apparatus for integrating injection and ignition in an internal combustion engine | |
| US10830201B2 (en) | Ignition system having a high-frequency plasma-enhanced ignition spark of a spark plug, including an antechamber, and a method associated therewith | |
| JP5321431B2 (en) | In-cylinder internal combustion engine | |
| JPH0712037A (en) | Method and device for combustion of fuel in internal combustion engine | |
| JPS6065225A (en) | Ignition device of internal-combustion engine | |
| JP3843217B2 (en) | Ignition device for internal combustion engine and method for igniting fuel filled in fuel chamber | |
| JP2003049650A (en) | Compressed self-ignition internal combustion engine | |
| JP2022042067A (en) | Spark plug for internal combustion engine and internal combustion engine including the same | |
| JPS60128975A (en) | Igniter for internal-combustion engine | |
| JPH02238118A (en) | Fuel supply ignition device and internal combustion engine adopting same | |
| JPS60135662A (en) | Ignition device for internal-combustion engine | |
| JPS61167116A (en) | Auxiliary ignition type diesel engine | |
| JP2022069418A (en) | Spark plug for internal combustion engine and internal combustion engine having the same | |
| JPS5911432Y2 (en) | internal combustion engine spark plug | |
| KR101230530B1 (en) | Direct Fuel Injected Internal Combustion Engine which have Multi-Point Spark Plug Coupled with Fuel Injector | |
| CN210326485U (en) | Spark plug for internal combustion engine | |
| JP2500113Y2 (en) | Methanol engine | |
| JP2022091097A (en) | Internal combustion engine spark plug and internal combustion engine equipped with the same |