JPH0228690B2 - - Google Patents
Info
- Publication number
- JPH0228690B2 JPH0228690B2 JP56179079A JP17907981A JPH0228690B2 JP H0228690 B2 JPH0228690 B2 JP H0228690B2 JP 56179079 A JP56179079 A JP 56179079A JP 17907981 A JP17907981 A JP 17907981A JP H0228690 B2 JPH0228690 B2 JP H0228690B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- injection nozzle
- main
- auxiliary
- glow plug
- 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 - Lifetime
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
- F02B19/00—Engines characterised by precombustion chambers
- F02B19/14—Engines characterised by precombustion chambers 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
- Y02T10/12—Improving ICE efficiencies
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)
Description
【発明の詳細な説明】 本発明は二元燃料内燃機関に関する。[Detailed description of the invention] The present invention relates to dual fuel internal combustion engines.
従来の副室式デイーゼル機関の燃焼室構造を第
１図に示す。図において、０１は過流室、０２は
燃焼室口金、０３は噴射ノズル、０４はグロープ
ラグ、０５は過流室から主燃焼室への連絡口、０
６はシリンダヘツド、０７はピストン、０８はシ
リンダライナである。 Figure 1 shows the combustion chamber structure of a conventional pre-chamber diesel engine. In the figure, 01 is the overflow chamber, 02 is the combustion chamber mouthpiece, 03 is the injection nozzle, 04 is the glow plug, 05 is the connection port from the overflow chamber to the main combustion chamber, 0
6 is a cylinder head, 07 is a piston, and 08 is a cylinder liner.
過流室式デイーゼル機関では、まず過流室（副
室）０１にて噴射ノズル０３から供給された燃料
により混合気を形成し、ピストン０７により高
温、高圧に圧縮された空気により圧縮着火せし
め、口金０２の連絡口０５からピストン０７とシ
リンダライナ０８とシリンダヘツド０６にて形成
される主燃焼室へ燃焼ガスが噴出され、ピストン
０７の動きにより仕事に変換される。また、グロ
ープラグ０７は始動時に着火を助けるために設け
られている。このような機関に適した燃料は自己
着火性の良い（比較的セタン価の高い）燃料であ
る。 In the overflow chamber type diesel engine, first, a mixture is formed in the overflow chamber (auxiliary chamber) 01 using fuel supplied from the injection nozzle 03, and the air is compressed and ignited using air compressed to high temperature and high pressure by the piston 07. Combustion gas is ejected from the communication port 05 of the mouthpiece 02 into the main combustion chamber formed by the piston 07, cylinder liner 08, and cylinder head 06, and is converted into work by the movement of the piston 07. Further, a glow plug 07 is provided to assist in ignition at the time of starting. A fuel suitable for such an engine is a fuel with good self-ignition properties (relatively high cetane number).
しかし、自己着火性の悪い燃料、例えばアルコ
ール燃料、石炭液化油等は燃料として過流室デイ
ーゼル機関に用いることはできない。 However, fuels with poor self-ignition properties, such as alcohol fuel and coal liquefied oil, cannot be used as fuel in overflow chamber diesel engines.
本発明の目的は上記の点に着目し、自己着火性
に低い燃料を用いた過流室デイーゼル機関には二
元燃料機関があるが、最も効率的な着火源として
副燃料を最適に供給することにより燃料事情の多
様化に対応できる二元燃料機関を提供することで
あり、その特徴とするところは、副室式内燃機関
において、主燃料を噴射する主噴射ノズルよりも
副室内の圧縮行程により生じる空気過流の上流側
に設けられ上記主噴射ノズルよりも下流側のグロ
ープラグに向けて上記主燃料よりも自己着火しや
すい副燃料を噴射する副噴射ノズルを備えたこと
である。 The purpose of the present invention is to focus on the above-mentioned points, and to optimally supply auxiliary fuel as the most efficient ignition source to overflow chamber diesel engines that use fuel with low self-ignition properties, although there are dual fuel engines. The aim is to provide a dual-fuel engine that can respond to diversifying fuel conditions by The present invention includes a sub-injection nozzle which is provided upstream of the air flow generated by the stroke and injects sub-fuel, which is easier to self-ignite than the main fuel, toward the glow plug downstream of the main injection nozzle.
これにより、副室の中央部に安定な着火源を設
定することができ、また始動時にはグロープラグ
により加熱、着火が可能であり、確実な起動がで
きる。 As a result, a stable ignition source can be set in the center of the subchamber, and at the time of startup, heating and ignition can be performed using the glow plug, allowing reliable startup.
以下図面を参照して本発明による実施例につき
説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第２図は本発明による二元燃料内燃機関の燃焼
室を示す断面図である。 FIG. 2 is a sectional view showing a combustion chamber of a dual-fuel internal combustion engine according to the present invention.
図において、０１は副室、即ち過流室、０２は
燃焼室口金、０３は主燃料用の噴射ノズル、即ち
主噴射ノズル、０４はグロープラグ、０５は過流
室から主燃焼室への連絡口、０６はシリンダヘツ
ド、０７はピストン、０８はシリンダライナであ
る。 In the figure, 01 is the auxiliary chamber, that is, the overflow chamber, 02 is the combustion chamber mouthpiece, 03 is the injection nozzle for the main fuel, that is, the main injection nozzle, 04 is the glow plug, and 05 is the communication from the overflow chamber to the main combustion chamber. 06 is the cylinder head, 07 is the piston, and 08 is the cylinder liner.
０９は副燃料用の噴射ノズル、即ち副噴射ノズ
ル、１０は空気過流、１１は主燃料の噴射方向、
１２は副燃料の噴射方向、１３は副噴射ノズル０
９の噴孔とグロープラグの先端を結ぶ線を示す。 09 is an injection nozzle for auxiliary fuel, that is, an auxiliary injection nozzle, 10 is an air overflow, 11 is an injection direction of main fuel,
12 is the injection direction of the auxiliary fuel, 13 is the auxiliary injection nozzle 0
The line connecting the nozzle hole No. 9 and the tip of the glow plug is shown.
上記構成の場合の作用、効果について述べる。 The functions and effects of the above configuration will be described.
副噴射ノズル０９は、主噴射ノズル０３よりも
空気の過流１０の上流側に配置され、自己着火性
の低い燃料（例えばアルコール燃料、石炭液化油
等）を主噴射ノズル０３から噴射するのに先立
ち、自己着火性の比較的高い燃料をグロープラグ
０４の方向、即ち主燃料噴霧の方向に噴射する。
そうすることによつて、自己着火性の比較的高い
副燃料はピストン０７により高温、高圧に圧縮さ
れた空気により着火する。丁度このころ、主噴射
ノズル０３から自己着火性に低い主燃料を過流方
向に噴射する。 The sub-injection nozzle 09 is disposed on the upstream side of the air flow 10 from the main injection nozzle 03, and is used to inject fuel with low self-ignition property (for example, alcohol fuel, coal liquefied oil, etc.) from the main injection nozzle 03. First, fuel with relatively high self-ignition properties is injected in the direction of the glow plug 04, that is, in the direction of the main fuel spray.
By doing so, the auxiliary fuel, which has a relatively high self-ignition property, is ignited by the air compressed to high temperature and high pressure by the piston 07. Just around this time, the main fuel with low self-ignition properties is injected from the main injection nozzle 03 in the overflow direction.
このことにより、着火した副燃料噴霧火炎が主
燃料噴霧に接するとともに、主燃料噴霧に包み込
まれるように過流室０１の中央部に副燃料噴霧火
炎が形成され、燃焼室壁面の影響を受けることな
く主燃料噴霧の安定した着火源となる。 As a result, the ignited auxiliary fuel spray flame comes into contact with the main fuel spray, and the auxiliary fuel spray flame is formed in the center of the overflow chamber 01 so as to be surrounded by the main fuel spray, and is influenced by the combustion chamber wall surface. It becomes a stable ignition source for the main fuel spray.
副燃料噴霧火炎により主燃料噴霧火炎が点火さ
れると、口金０２の連絡口０５からピストン０７
とシリンダライナ０８とシリンダヘツド０６とか
らなる主燃焼室へ燃焼ガスが噴出され、ピストン
０７の動きにより仕事に変換される。 When the main fuel spray flame is ignited by the auxiliary fuel spray flame, the piston 07
Combustion gas is ejected into a main combustion chamber consisting of a cylinder liner 08 and a cylinder head 06, and is converted into work by the movement of a piston 07.
さらに起動時には、通常機関回転数の上昇が十
分でないので、圧縮圧力の上昇が十分でなく、セ
タン価の高い燃料でも自己着火しにくい。そのた
め、グロープラグ０４に通電し加熱し、着火を助
ける。しかし、これは燃料噴霧が直接接触しなけ
れば効果が薄い。そのため、副燃料噴霧が起動時
にも確実に着火するように、その噴射方向を矢印
１２に示すように副噴射ノズルの噴孔とグロープ
ラグの先端を結ぶ線１３よりも副室０１の外周側
に向け、確実にグロープラグ０４に直接接触さ
せ、着火核を作り、前記したと同じ機構にて主燃
料に着火させ、始動させる。 Furthermore, at the time of startup, the engine speed usually does not rise sufficiently, so the compression pressure does not rise enough, and even fuel with a high cetane number is difficult to self-ignite. Therefore, the glow plug 04 is energized and heated to assist in ignition. However, this is less effective if the fuel spray does not come in direct contact. Therefore, in order to ensure that the auxiliary fuel spray is ignited even during startup, the injection direction is set to the outer circumferential side of the auxiliary chamber 01 than the line 13 connecting the nozzle hole of the auxiliary injection nozzle and the tip of the glow plug, as shown by the arrow 12. The main fuel is then brought into direct contact with the glow plug 04 to form an ignition nucleus, and the main fuel is ignited using the same mechanism as described above to start the fuel.
上述の場合には、副室の中央部に安定した着火
源を設けることができ、また起動時にはグロープ
ラグを介して確実な起動ができる。 In the above case, a stable ignition source can be provided in the center of the subchamber, and reliable startup can be performed via the glow plug during startup.
第１図は従来の副室式デイーゼル機関の燃焼室
を示す断面図、第２図は本発明による１実施例の
燃焼室を示す断面図である。
０１……副室、０３……主噴射ノズル、０４…
…グロープラグ、０９……副噴射ノズル、１０…
…空気過流、１１……主燃料の噴射方向、１２…
…副燃料の噴射方向。
FIG. 1 is a sectional view showing a combustion chamber of a conventional pre-chamber type diesel engine, and FIG. 2 is a sectional view showing a combustion chamber of an embodiment according to the present invention. 01...Subchamber, 03...Main injection nozzle, 04...
...Glow plug, 09...Sub-injection nozzle, 10...
...Air overflow, 11...Main fuel injection direction, 12...
...Injection direction of auxiliary fuel.
Claims (1)
主噴射ノズルよりも副室内の圧縮行程により生じ
る空気過流の上流側に設けられ上記主噴射ノズル
よりも下流側のグロープラグに向けて上記主燃料
よりも自己着火しやすい副燃料を噴射する副噴射
ノズルを備えたことを特徴とする二元燃料内燃機
関。1 In an auxiliary chamber type internal combustion engine, the main injection nozzle that injects the main fuel is provided upstream of the air turbulence generated by the compression stroke in the auxiliary chamber, and is directed toward the glow plug downstream of the main injection nozzle. A dual-fuel internal combustion engine characterized by being equipped with an auxiliary injection nozzle that injects auxiliary fuel that is more likely to self-ignite than fuel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56179079A JPS5882015A (en) | 1981-11-10 | 1981-11-10 | Binary fuel internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56179079A JPS5882015A (en) | 1981-11-10 | 1981-11-10 | Binary fuel internal-combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5882015A JPS5882015A (en) | 1983-05-17 |
| JPH0228690B2 true JPH0228690B2 (en) | 1990-06-26 |
Family
ID=16059711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56179079A Granted JPS5882015A (en) | 1981-11-10 | 1981-11-10 | Binary fuel internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5882015A (en) |
-
1981
- 1981-11-10 JP JP56179079A patent/JPS5882015A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5882015A (en) | 1983-05-17 |
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