JPH0343652A - Gas injection diesel engine - Google Patents

Gas injection diesel engine

Info

Publication number
JPH0343652A
JPH0343652A JP1174075A JP17407589A JPH0343652A JP H0343652 A JPH0343652 A JP H0343652A JP 1174075 A JP1174075 A JP 1174075A JP 17407589 A JP17407589 A JP 17407589A JP H0343652 A JPH0343652 A JP H0343652A
Authority
JP
Japan
Prior art keywords
pilot
gas
fuel
main
main 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
Application number
JP1174075A
Other languages
Japanese (ja)
Inventor
Saiji Toshioka
利岡　才次
Toshiyasu Shimonaka
下中　利康
Hirohisa Endo
裕久 遠藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Engineering and Shipbuilding Co Ltd
Original Assignee
Mitsui Engineering and Shipbuilding Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsui Engineering and Shipbuilding Co Ltd filed Critical Mitsui Engineering and Shipbuilding Co Ltd
Priority to JP1174075A priority Critical patent/JPH0343652A/en
Publication of JPH0343652A publication Critical patent/JPH0343652A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/16—Indirect injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

PURPOSE:To secure the ignition without loosing combustion performance with a simple fuel system by independently injecting a part of a main gas fuel into a pilot combustion chamber with a glow plug as an ignition pilot gas. CONSTITUTION:Respective ring chambers 7, 15 of a main gas valve 4 and a pilot gas valve 12 forming an injection valve 1 installed to a cylinder head 2 are filled with a main gas fuel G, respectively. When the plunger 24 of a control oil pump 11 synchronously operating with the crankshaft of an engine is raised, and the pressure of a control oil O reaches a first set value, the pilot gas valve 12 is opened, and a part of the main gas fuel G is injected from the nozzle into a pilot combustion chamber 21 as an ignition pilot gas G' to be ignited by a glow plug 20. Thereafter, when the pressure of the control oil O reaches a higher second set value, the main gas valve 4 is opened, and the main gas fuel G is injected from its nozzle 23 into a main combustion chamber 3.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ガスインジェクションディーゼルエンジンに
関する。特に、ガス燃料の一部を着火用のパイロットガ
スとして用いるガスインジェクションディーゼルエンジ
ンに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a gas injection diesel engine. In particular, the present invention relates to a gas injection diesel engine that uses part of the gas fuel as a pilot gas for ignition.

〔従来の技術〕[Conventional technology]

高圧のガス燃料を、直接、シリンダ内に噴射する中・低
速のディーゼルエンジンでは、自己着火が困難なため、
着火源としてパイロットオイルを用いたディーゼルエン
ジンが開発されている。In medium- and low-speed diesel engines that inject high-pressure gas fuel directly into the cylinder, self-ignition is difficult, so
Diesel engines have been developed that use pilot oil as an ignition source.

然しなから、このディーゼルエンジンでは、燃料系統が
２系列になり、それ分だけ設備、エンジン共に燃料系統
が複雑となり、又、オイルの輸送が困難な場所では設置
そのものが不可能になる。However, this diesel engine has two fuel systems, which complicates the fuel system for both the equipment and the engine, and also makes it impossible to install it in locations where it is difficult to transport oil.

そこで、パイロットオイルに代わり、グロープラグによ
る着火方法も考えられるが、現在のグロープラグでは、
表面温度が約９００　’Ｃ程度であり、この程度の温度
では、着火遅れ、または、着火不能が生じ、安定した燃
焼を得ることが非常に困難である。Therefore, an ignition method using glow plugs could be considered instead of pilot oil, but with the current glow plugs,
The surface temperature is about 900'C, and at this temperature, ignition delay or ignition failure occurs, making it very difficult to obtain stable combustion.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

本発明は、係る従来の問題点に鑑みてなされたものであ
り、ディーゼルエンジンの燃焼性能を損なうことなく、
確実に着火でき、かつ、燃料系統の簡素化が図れるディ
ーゼルエンジンを提供することを目的とするものである
。The present invention has been made in view of the conventional problems, and it is possible to achieve the following without impairing the combustion performance of a diesel engine.
The object of the present invention is to provide a diesel engine that can reliably ignite and has a simplified fuel system.

〔課題を解決するための手段〕[Means to solve the problem]

すなわち、本発明のガスインジェクションディーゼルエ
ンジンは、高圧のガス燃料をシリンダ内に噴射するガス
インジェクションディーゼルエンジンにおいて、前記ガ
ス燃料の一部を着火用のパイロットガスとして独立に、
グロープラグを備えたパイロット燃焼室内に噴射するこ
とを特徴とするものである。That is, the gas injection diesel engine of the present invention is a gas injection diesel engine that injects high-pressure gas fuel into a cylinder, in which a portion of the gas fuel is independently used as a pilot gas for ignition.
The fuel is injected into a pilot combustion chamber equipped with a glow plug.

〔実施例〕〔Example〕

以下、図面により本発明の実施例について説明する。 Embodiments of the present invention will be described below with reference to the drawings.

第１図において、１はシリンダへラド２に装着した燃料
噴射弁であり、この燃料噴射弁１から主燃焼室３内に、
高圧の主ガス燃料Ｇ、すなわち、２５０ｋｇ／−のメタ
ンガスが噴射されるようになっている。In FIG. 1, 1 is a fuel injection valve attached to a cylinder head 2, and from this fuel injection valve 1 into the main combustion chamber 3,
High-pressure main gas fuel G, that is, 250 kg/- of methane gas is injected.

主ガス燃料Ｇを噴射するメインガス弁４は、スピンドル
５と当該スピンドル５を押圧するためのスプリング６か
ら構成されており、その開弁圧は４００ｋｇ／ｃａｌに
設定されている。また、スピンドル５の先端部分に望ま
しめてガス燃料溜めとしての環状室７が設けられており
、更に、スピンドル５のピストン部分８が配設されてい
るシリンダ９は、管１０を介して管制油ポンプ１１に連
通している。The main gas valve 4 that injects the main gas fuel G is composed of a spindle 5 and a spring 6 for pressing the spindle 5, and its opening pressure is set to 400 kg/cal. Further, an annular chamber 7 as a gas fuel reservoir is provided at the tip of the spindle 5, and a cylinder 9 in which a piston portion 8 of the spindle 5 is disposed is connected to a control oil pump via a pipe 10. It is connected to 11.

他方、パイロットガス弁１２はスピンドル１３と当該ス
ピンドル１３を押圧するためのスプリング１４から構成
されており、開弁圧は２００ｋｇ／ｃ＋４に設定されて
いる。また、スピンドル１３の先端部分に望ましめて主
ガス燃料Ｇの供給源に連通ずる環状室１５が設けられて
おり、更に、スピンドル１３のピストン部分１６はシリ
ンダ１７内に配設されている。そして、パイロットガス
弁１２のシリンダ１７は通路１８を介してメインガス弁
４のシリンダ９に連通し、また、パイロットガス弁１２
の環状室１５は通路１９を介してメインガス弁４の環状
室７に連通している。On the other hand, the pilot gas valve 12 is composed of a spindle 13 and a spring 14 for pressing the spindle 13, and the valve opening pressure is set to 200 kg/c+4. Further, an annular chamber 15 is provided at the distal end of the spindle 13 and communicates with the main gaseous fuel G supply source, and a piston portion 16 of the spindle 13 is disposed within a cylinder 17 . The cylinder 17 of the pilot gas valve 12 communicates with the cylinder 9 of the main gas valve 4 via the passage 18, and the cylinder 17 of the pilot gas valve 12 also communicates with the cylinder 9 of the main gas valve 4.
The annular chamber 15 of the main gas valve 4 communicates with the annular chamber 7 of the main gas valve 4 via a passage 19 .

上記シリンダへラド２には、表面温度が約９００℃程度
になるグロープラグ２０を備えたパイロット燃焼室２１
が設けられており、パイロットガス弁１２には、パイロ
ット燃焼室２１に向けて噴孔２２が設けられ、メインガ
ス弁４には、主燃焼室３に向けて噴孔２３が設けられて
いる。The cylinder head 2 has a pilot combustion chamber 21 equipped with a glow plug 20 whose surface temperature is about 900°C.
The pilot gas valve 12 is provided with a nozzle hole 22 facing the pilot combustion chamber 21 , and the main gas valve 4 is provided with a nozzle hole 23 facing the main combustion chamber 3 .

次に、上記ガスインジェクションディーゼルエンジンの
作用について説明する。Next, the operation of the gas injection diesel engine will be explained.

■　メインガス弁４及びパイロットガス弁１２の環状室
７．１５は、メインガス燃料Ｇの供給源に連通し、当該
ガスによって満たされている。(2) The annular chambers 7.15 of the main gas valve 4 and the pilot gas valve 12 communicate with the supply source of the main gas fuel G and are filled with the gas.

■　そして、図示しないクランク軸の回転と同期する管
制油ポンプ１１のプランジャ２４が上昇するにしたがっ
て管制油○の圧力が、第４図に示すように、増加し、そ
の圧力が２００　ｋｇ／ｄに達すると、パイロットガス
弁１２が開いて噴孔２２からメインガス燃料Ｇの一部が
着火用のバイットガスＧ°としてパイロット燃焼室２１
内に噴射され、そこで、グロープラグ２０に触れて着火
する。■ Then, as the plunger 24 of the control oil pump 11, which is synchronized with the rotation of the crankshaft (not shown), rises, the pressure of the control oil ○ increases as shown in Fig. 4, and the pressure reaches 200 kg/d. When the gas reaches the target, the pilot gas valve 12 opens and a part of the main gas fuel G flows from the nozzle hole 22 into the pilot combustion chamber 21 as a byte gas G° for ignition.
There, it touches the glow plug 20 and ignites.

■　次いで、管制油Ｏの圧力が４００　ｋｇ／ｃｔｌに
達すると、メインガス弁４が開いて、その噴孔２３から
主燃焼室３にメインガス燃料Ｇが噴射され、このメイン
ガス燃料Ｇに着火したパイロットガスＧ“の火炎が移行
してメインガス燃料Ｇが燃焼する。■ Next, when the pressure of the control oil O reaches 400 kg/ctl, the main gas valve 4 opens and the main gas fuel G is injected from the nozzle hole 23 into the main combustion chamber 3, and this main gas fuel G is ignited. The flame of the pilot gas G" transferred to the main gas fuel G burns.

第５図は本発明にかかる他の実施例を示し、メインガス
弁４とパイロットガス弁１２をそれぞれ独立に装着した
ものである。FIG. 5 shows another embodiment of the present invention, in which a main gas valve 4 and a pilot gas valve 12 are installed independently.

〔発明の効果〕〔Effect of the invention〕

上記のように、本発明は、高圧のガス燃料をシリンダ内
に噴射するガスインジェクションディーゼルエンジンに
おいて、前記ガス燃料の一部を着火用のパイロットガス
として独立に、グロープラグを備えたパイロット燃焼室
内に噴射するので、ディーゼルエンジンの燃焼性能を損
なうことなく確実に着火できる。また、ガス燃料の一部
を着火用のパイロットガスとして用いるので、パイロッ
トオイルを用いる従来の方式に比べて燃料系統が格段に
簡素化されるばかりでなく、オイルの輸送が困難な場所
への設置も可能となる。As described above, in a gas injection diesel engine that injects high-pressure gas fuel into a cylinder, a portion of the gas fuel is independently used as a pilot gas for ignition into a pilot combustion chamber equipped with a glow plug. Since it is injected, it can be ignited reliably without impairing the combustion performance of the diesel engine. In addition, since a portion of the gas fuel is used as pilot gas for ignition, the fuel system is not only much simpler than the conventional method that uses pilot oil, but also allows installation in locations where it is difficult to transport oil. is also possible.

以上の説明では、１台の管制油ポンプ１１によってメイ
ンガス弁４およびパイロットガス弁１２の開閉を制御し
ているが、メインガス弁４およびパイロットガス弁１２
の開閉を２台の管制油ポンプ１１によってそれぞれ独立
に制御してもよい。この場合、パイロットガスの噴射開
始、噴射期間を自由に設定できるため、着火・燃焼性能
の最適化を図ることができる。又、第５図に示すように
、メインガス弁とパイロットガス弁をそれぞれ独立に装
着してもよい。In the above explanation, the opening and closing of the main gas valve 4 and the pilot gas valve 12 are controlled by one control oil pump 11.
The opening and closing of the control oil pumps 11 may be independently controlled by the two controlled oil pumps 11. In this case, the pilot gas injection start and injection period can be freely set, so ignition and combustion performance can be optimized. Further, as shown in FIG. 5, the main gas valve and the pilot gas valve may be installed independently.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明に係るガスインジヱクションディーゼル
エンジンの縦断面図、第２図は第１図のＡ−Ａ断面図、
第３図は第１図のＢ−Ｂ断面図、第４図は管制油Ｏの圧
力とクランク角との関係を示す説明図、第５図は本発明
に係る他の実施例を示す縦断面図である。 Ｇ・・・ガス燃料、Ｇ′・・・パイロットガス、２０・
・・グロープラグ、２１・・・パイロット燃焼室。 第 図 第２ 図 第 図 第 図 パイロットガス噴射期間 第 図FIG. 1 is a longitudinal cross-sectional view of a gas injection diesel engine according to the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG.
FIG. 3 is a sectional view taken along line B-B in FIG. 1, FIG. 4 is an explanatory diagram showing the relationship between the pressure of control oil O and the crank angle, and FIG. 5 is a longitudinal cross-section showing another embodiment of the present invention. It is a diagram. G...Gas fuel, G'...Pilot gas, 20.
...Glow plug, 21...Pilot combustion chamber. Figure 2 Figure 2 Figure Pilot gas injection period Figure

Claims (1)

【特許請求の範囲】[Claims] 高圧のガス燃料をシリンダ内に噴射するガスインジェク
ションディーゼルエンジンにおいて、前記ガス燃料の一
部を着火用パイロットガスとして独立に、グロープラグ
を備えたパイロット燃焼室内に噴射することを特徴とす
るガスインジェクションディーゼルエンジン。A gas injection diesel engine that injects high-pressure gas fuel into a cylinder, characterized in that a part of the gas fuel is independently injected as pilot gas for ignition into a pilot combustion chamber equipped with a glow plug. engine.
JP1174075A 1989-07-07 1989-07-07 Gas injection diesel engine Pending JPH0343652A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1174075A JPH0343652A (en) 1989-07-07 1989-07-07 Gas injection diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1174075A JPH0343652A (en) 1989-07-07 1989-07-07 Gas injection diesel engine

Publications (1)

Publication Number Publication Date
JPH0343652A true JPH0343652A (en) 1991-02-25

Family

ID=15972204

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1174075A Pending JPH0343652A (en) 1989-07-07 1989-07-07 Gas injection diesel engine

Country Status (1)

Country Link
JP (1) JPH0343652A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107077062A (en) * 2014-11-04 2017-08-18 日本轻金属株式会社 Support frame for skin and manufacturing method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107077062A (en) * 2014-11-04 2017-08-18 日本轻金属株式会社 Support frame for skin and manufacturing method thereof
US20170343894A1 (en) * 2014-11-04 2017-11-30 Nippon Light Metal Company, Ltd. Pellicle support frame and production method

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