JPS62237026A - Combustion chamber of spark ignition type dual fuel engine - Google Patents
Combustion chamber of spark ignition type dual fuel engineInfo
- Publication number
- JPS62237026A JPS62237026A JP8006986A JP8006986A JPS62237026A JP S62237026 A JPS62237026 A JP S62237026A JP 8006986 A JP8006986 A JP 8006986A JP 8006986 A JP8006986 A JP 8006986A JP S62237026 A JPS62237026 A JP S62237026A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- combustion chamber
- spark
- spark plug
- gas
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 92
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 32
- 230000009977 dual effect Effects 0.000 title claims description 5
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 239000003350 kerosene Substances 0.000 abstract description 8
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は都市ガス等の気体燃料及び灯油等の液体燃料の
２つの燃料系統を有し、燃焼室内に設けた２個の点火プ
ラグを各燃料でそれぞれ使いわけ可能とした火花点火式
デュアルフューエル機関の燃焼室に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention has two fuel systems, one for gaseous fuel such as city gas, and the other for liquid fuel such as kerosene. This relates to the combustion chamber of a spark-ignition dual-fuel engine that can be used for different fuels.
上記のごとく２つの燃料系統をそれぞれ専焼で用いる火
花点火式デュアルフューエル機関では、常時は都市ガス
等の気体燃料を通常のガス機関同様にミキサ経由燃焼室
に供給し、そして非常時には灯油等の液体燃料を燃料ポ
ンプ及び燃料弁経由燃焼室に供給して、それぞれ火花点
火により運転するのが一般的であり、気体燃料による運
転が主となる。In a spark-ignition dual-fuel engine that uses two fuel systems for exclusive combustion as described above, gaseous fuel such as city gas is normally supplied to the combustion chamber via a mixer like a normal gas engine, and in an emergency, liquid such as kerosene is supplied to the combustion chamber. Generally, fuel is supplied to the combustion chamber via a fuel pump and a fuel valve, and the combustion chamber is operated by spark ignition, and the combustion chamber is mainly operated using gaseous fuel.
そこで、非常時の灯油使用時に、都市ガス使用時と同じ
圧縮比で灯油を使用することは、予混合燃焼ではノッキ
ング発生のため困難であり、正常燃焼させるためにはデ
ィーゼル機関と同様の燃料ポンプ及び燃料弁等からなる
燃料供給装置を有し、点火プラグで点火するスパークア
シストディーゼル方式、または層状給気方式とする必要
があり、気体燃料及び液体燃料それぞれに点火プラグを
設けることが望ましい。Therefore, when using kerosene in an emergency, it is difficult to use kerosene at the same compression ratio as when using city gas because knocking occurs with premix combustion. It is necessary to have a fuel supply device consisting of a fuel valve and a fuel valve, etc., and use a spark-assisted diesel type or stratified air supply type in which ignition is performed using a spark plug, and it is desirable to provide a spark plug for each of the gaseous fuel and the liquid fuel.
なお、一つの機関の燃焼室に２個の点火プラグを設けた
ものとしては、特開昭５８−４７１７０のエンジンの点
火制御装置に関する発明がなされているが、この発明は
、２個の点火プラグを交互に放電させるようにしたもの
であり、本発明のごとく気体燃料及び液体燃料用にそれ
ぞれ使い分けるものではない。As an example of an engine in which two spark plugs are provided in the combustion chamber of one engine, there is an invention related to an engine ignition control device in JP-A-58-47170. The fuel is designed to be discharged alternately, and is not used separately for gaseous fuel and liquid fuel as in the present invention.
本発明は前記のごとき火花点火式デュアルフューエル機
関の要求に応えるためになされたものであり、気体燃料
及び液体燃料のそれぞれに対し専用の点火プラグを設け
て、それぞれの燃料使用時の機関の運転性能の向上をは
かることを目的としたものである。The present invention was made in response to the above-mentioned requirements for spark-ignited dual-fuel engines, and provides dedicated spark plugs for each of gaseous fuel and liquid fuel to control engine operation when using each fuel. The purpose is to improve performance.
本発明の火花点火式デュアルフューエル機関の燃焼室は
、気体燃料及び液体燃料の２つの燃料系統を有し、気体
燃料はミキサ経由燃焼室に供給し、かつ液体燃料は燃料
弁経由燃焼室に供給すると共に、これら２種類の燃料を
火花点火させる火花点火式デュアルフューエル機関にお
いて、気体燃料用の点火プラグを燃焼室中心付近に配設
すると共に、液体燃料用の点火プラグを点火室内に配設
し、各燃料に対して２個の点火プラグをそれぞれ使いわ
け可能とすることにより構成される。The combustion chamber of the spark-ignition dual-fuel engine of the present invention has two fuel systems, gaseous fuel and liquid fuel, where the gaseous fuel is supplied to the combustion chamber via a mixer, and the liquid fuel is supplied to the combustion chamber via a fuel valve. At the same time, in a spark-ignition dual fuel engine that ignites these two types of fuel with a spark, the spark plug for gaseous fuel is placed near the center of the combustion chamber, and the spark plug for liquid fuel is placed inside the ignition chamber. , by allowing two spark plugs to be used for each fuel.
以下図面を参照して本発明の詳細な説明するが、第１図
は本発明の実施例１における火花点火式デュアルフュー
エル機関の燃焼室の要部縦断面図であり、この燃焼室７
はピストン５の頂部に凹状に設けられたものであり、灯
油等の液体燃料の系統は、図示されていない燃料ポンプ
及び燃料管そして燃料弁１からなる燃料供給装置に供給
され、シリンダヘッド６に設けられた燃料弁１から燃焼
室７に噴射されるが、この液体燃料使用時には、燃料弁
１から噴射される液体燃料をその点火室８の内壁に突出
して設けた点火プラグ２で点火するようになっている。The present invention will be described in detail below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a main part of a combustion chamber of a spark-ignition dual-fuel engine in Embodiment 1 of the present invention, and this combustion chamber 7
is provided in a concave shape at the top of the piston 5, and a liquid fuel system such as kerosene is supplied to a fuel supply device (not shown) consisting of a fuel pump, a fuel pipe, and a fuel valve 1, and is supplied to the cylinder head 6. The fuel is injected into the combustion chamber 7 from a fuel valve 1 provided therein. When using this liquid fuel, the liquid fuel injected from the fuel valve 1 is ignited by a spark plug 2 provided protruding from the inner wall of the ignition chamber 8. It has become.
一方、都市ガスなどの気体燃料を使用するときは、図示
されていないミキサで混合気を形成の上、その混合気を
吸気ポート経由、燃焼室７内に供給するが、燃焼室７の
中心付近に突出して設けられた点火プラグ３で点火させ
るようになっている。On the other hand, when using gaseous fuel such as city gas, a mixture is formed in a mixer (not shown) and the mixture is supplied into the combustion chamber 7 via the intake port, but near the center of the combustion chamber 7. The ignition is caused by a spark plug 3 provided protruding from the side.
次に、第２図の実施例２の火花点火式デュアルフューエ
ル機関では、液体燃料の系統に、吸気管４に設けられた
主燃料弁ＩＡとピストン５の頂面の燃焼室７に開口する
点火室８に設けられた副燃料弁ＩＢとの２つの燃料供給
系統を有し、点火室８の内壁に突出して設けた点火プラ
グ２で点火するようになっており、一方気体燃料用の点
火プラグ３は燃焼室７の中心付近に突出して設けられて
いる。Next, in the spark ignition dual fuel engine of the second embodiment shown in FIG. It has two fuel supply systems, including an auxiliary fuel valve IB provided in the chamber 8, and is designed to ignite with a spark plug 2 protruding from the inner wall of the ignition chamber 8.On the other hand, a spark plug for gaseous fuel is provided. 3 is provided protruding near the center of the combustion chamber 7.
以上説明したごとく、本発明の火花点火式デュアルフュ
ーエル機関の燃焼室においては、液体燃料用及び気体燃
料用にそれぞれ専用の点火プラグを用いることにより、
都市ガスなどの気体燃料の使用時には、燃焼室中心付近
に設けた専用の点火プラグで高い熱効率の運転が得られ
るが、この場合においても、液体燃料用の点火プラグは
点火室内に設けられているので、噴射弁と共に高温の燃
焼から保護されることになり、都市ガス使用の運転時に
おける温度上昇による問題を回避できる。As explained above, in the combustion chamber of the spark-ignition dual fuel engine of the present invention, by using dedicated spark plugs for liquid fuel and gaseous fuel,
When using gaseous fuel such as city gas, high thermal efficiency can be achieved with a special spark plug placed near the center of the combustion chamber, but even in this case, the spark plug for liquid fuel is placed inside the ignition chamber. Therefore, the fuel injection valve and the fuel injection valve are protected from high-temperature combustion, and problems caused by temperature rise during operation using city gas can be avoided.
また、本発明によれば、液体燃料に対して、従来のディ
ーゼル機関と同様の燃料供給方式を有し、更に、専用の
点火プラグを有しているので、都市ガス使用時と同様高
い圧縮比での運転が可能であり、また、点火室を設けて
いるのでアルコール及び灯油など着火性の悪い液体燃料
の使用が可能になる。Furthermore, according to the present invention, the fuel supply method for liquid fuel is similar to that of conventional diesel engines, and since it has a dedicated spark plug, the compression ratio is as high as when using city gas. In addition, since it is equipped with an ignition chamber, it is possible to use liquid fuels with poor ignitability such as alcohol and kerosene.
第１図は本発明の実施例における火花点火式デュアルフ
ューエル機関の燃焼室の要部縦断面図、第２図は本発明
の実施例２における火花点火式デュアルフューエル機関
の燃焼室の要部縦断面図である。
１・・・燃料弁、ＩＡ・・・主燃料弁、ＩＢ・・・副燃
料弁、２・・・点火プラグ（液体燃料用）、３・・・点
火プラグ（気体燃料用）、７・・・燃焼室、８・・・点
火室。FIG. 1 is a vertical cross-sectional view of a main part of a combustion chamber of a spark-ignition dual-fuel engine according to an embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of a main part of a combustion chamber of a spark-ignition dual-fuel engine according to a second embodiment of the present invention. It is a front view. 1...Fuel valve, IA...Main fuel valve, IB...Auxiliary fuel valve, 2...Spark plug (for liquid fuel), 3...Spark plug (for gaseous fuel), 7...・Combustion chamber, 8...Ignition chamber.
Claims (1)
料はミキサ経由燃焼室に供給し、かつ液体燃料は燃料弁
経由燃焼室に供給すると共に、これら２種類の燃料を火
花点火させる火花点火式デュアルフューエル機関におい
て、気体燃料用の点火プラグを燃焼室中心付近に配設す
ると共に、液体燃料用の点火プラグを点火室内に配設し
、各燃料に対して２個の点火プラグをそれぞれ使いわけ
可能とした火花点火式デュアルフューエル機関の燃焼室
。It has two fuel systems: gaseous fuel and liquid fuel, gaseous fuel is supplied to the combustion chamber via a mixer, liquid fuel is supplied to the combustion chamber via a fuel valve, and the spark ignition system ignites these two types of fuel with a spark. In a type dual fuel engine, the spark plug for gaseous fuel is placed near the center of the combustion chamber, and the spark plug for liquid fuel is placed inside the ignition chamber, so that two spark plugs are used for each fuel. The combustion chamber of a spark-ignition dual-fuel engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8006986A JPS62237026A (en) | 1986-04-09 | 1986-04-09 | Combustion chamber of spark ignition type dual fuel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8006986A JPS62237026A (en) | 1986-04-09 | 1986-04-09 | Combustion chamber of spark ignition type dual fuel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62237026A true JPS62237026A (en) | 1987-10-17 |
Family
ID=13707936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8006986A Pending JPS62237026A (en) | 1986-04-09 | 1986-04-09 | Combustion chamber of spark ignition type dual fuel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62237026A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02148588U (en) * | 1989-05-08 | 1990-12-18 |
-
1986
- 1986-04-09 JP JP8006986A patent/JPS62237026A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02148588U (en) * | 1989-05-08 | 1990-12-18 |
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