JPS61106914A - Combustion chamber in internal combustion engine - Google Patents
Combustion chamber in internal combustion engineInfo
- Publication number
- JPS61106914A JPS61106914A JP59226730A JP22673084A JPS61106914A JP S61106914 A JPS61106914 A JP S61106914A JP 59226730 A JP59226730 A JP 59226730A JP 22673084 A JP22673084 A JP 22673084A JP S61106914 A JPS61106914 A JP S61106914A
- Authority
- JP
- Japan
- Prior art keywords
- combustion chamber
- auxiliary
- chamber
- sub
- cylinder
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 89
- 239000000446 fuel Substances 0.000 claims abstract description 23
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 abstract description 4
- 239000000779 smoke Substances 0.000 abstract description 3
- 244000118350 Andrographis paniculata Species 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000567 combustion gas Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/04—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being subdivided into two or more chambers
-
- 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)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は内燃機関の燃焼室に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a combustion chamber of an internal combustion engine.
従来の副室式機関の燃焼室を第７図、第８図に示す。図
において、シリンダヘッド４内に１個の副燃焼室２が設
置されている。副燃焼室２の形状は２円柱状２円錐台、
半球形及びこれらを変形して組合せたもの、または球形
を変形したもの等があるが、第７図、第８図には前者の
場合の１例を示す。The combustion chamber of a conventional pre-chamber engine is shown in FIGS. 7 and 8. In the figure, one auxiliary combustion chamber 2 is installed within a cylinder head 4. The shape of the sub-combustion chamber 2 is two cylinders and two truncated cones.
There are hemispherical shapes, modified combinations of these shapes, and modified spherical shapes, and FIGS. 7 and 8 show an example of the former case.
副燃焼室２に燃料噴射弁５及び機関の始動時に副燃焼室
２内を予熱するグロープラグ６を必要に応じて設置する
。副燃焼室２は副室噴口３を介してピストン７０頂面、
シリンダ８．シリンダヘッド４の下面から構成される主
燃焼室１と連通している。副室噴口３は１個あるいは複
数個のものがあるが９図には２個の場合を示す。また、
ピストシフ０頂面には副室噴口３に対応した主燃焼室１
が設置されている。A fuel injection valve 5 and a glow plug 6 for preheating the inside of the auxiliary combustion chamber 2 at the time of starting the engine are installed in the auxiliary combustion chamber 2 as necessary. The auxiliary combustion chamber 2 is connected to the top surface of the piston 70 via the auxiliary chamber nozzle 3,
Cylinder 8. It communicates with the main combustion chamber 1 formed from the lower surface of the cylinder head 4. Although there are one or more subchamber nozzles 3, FIG. 9 shows a case where there are two. Also,
The main combustion chamber 1 corresponding to the sub-chamber nozzle 3 is on the top of the piston shifter 0.
is installed.
機関運転時の圧縮行程で、ピストン７により主燃焼室１
内の空気は圧縮され副室噴口３を経て副燃焼室２内に流
入する。燃料噴射弁５より燃料を噴射すると、燃料は副
燃焼室２内の空気と混合し。During the compression stroke during engine operation, the main combustion chamber 1 is
The air inside is compressed and flows into the sub-combustion chamber 2 through the sub-chamber nozzle 3. When fuel is injected from the fuel injection valve 5, the fuel mixes with the air in the sub-combustion chamber 2.
着火、燃焼する。副燃焼室２から噴出される未燃燃料の
主燃焼室１内の空気との混合は副燃焼室２からのガス噴
出により行われる。また、副燃焼室２内の未燃撚製は燃
焼ガスにより活性化されている。副燃焼室２から流出し
た噴流は、シリンダ中心線Ａ−Ａに対し副燃焼室２と反
対側のシリンダ８壁まで到達し、壁面に衝突する。衝突
後はシリンダ８壁の壁面に沿って分散する。Ignite and burn. The unburned fuel ejected from the sub-combustion chamber 2 is mixed with the air in the main combustion chamber 1 by gas ejected from the sub-combustion chamber 2 . Further, the unburned twisted material in the sub-combustion chamber 2 is activated by the combustion gas. The jet flow flowing out from the sub-combustion chamber 2 reaches the wall of the cylinder 8 on the opposite side of the sub-combustion chamber 2 with respect to the cylinder centerline A-A, and collides with the wall surface. After the collision, the particles disperse along the wall surface of the cylinder 8 wall.
しかし上記のものには次の欠点がある。 However, the above method has the following drawbacks.
主燃焼室１内での燃料と空気の混合気形成、燃焼を良好
にするには、短時間で噴流が上記シリンダ８壁まで到達
し、その後シリンダ８壁の壁面に沿って分散せねばなら
ない。In order to improve the formation and combustion of a mixture of fuel and air in the main combustion chamber 1, the jet stream must reach the wall of the cylinder 8 in a short period of time, and then be dispersed along the wall surface of the cylinder 8 wall.
一般に小形副室式機関の場合は、吸、排気弁等の配置の
ため構造的に副燃焼室をシリンダ中心へ寄せて設置する
のに限度がある。そのため、副室噴口３の通路面積を小
さくシ、噴流速度を大きくしているので、副室噴口３の
絞り損失及び主燃焼室１内の熱損失が大きくなり、燃費
が悪化する。Generally, in the case of a small sub-combustion chamber type engine, there is a structural limit to installing the sub-combustion chamber close to the center of the cylinder due to the arrangement of intake and exhaust valves, etc. Therefore, since the passage area of the sub-chamber nozzle 3 is made small and the jet velocity is increased, the throttling loss of the sub-chamber nozzle 3 and the heat loss within the main combustion chamber 1 become large, resulting in poor fuel efficiency.
）〕 本発明の目的しま上言己０点に着目し・冨
°］室式機関の燃費を改善するため、副室噴口の絞り損
失を低減し、主、副燃焼室１，２の熱損失を低減し、主
燃焼室内の燃料と空気の混合、燃焼を改善できる燃焼室
を提供することであり、その特徴とするところは、シリ
ンダヘッド内に複数個の副燃焼室を設けると共に、上記
各副燃焼室に燃料噴射弁及び主燃焼室に開口する副室噴
口を備えたことである。)] Purpose of the present invention Focusing on the above-mentioned 0 point, in order to improve the fuel efficiency of a chamber engine, the throttling loss of the auxiliary chamber nozzle is reduced, and the heat loss of the main and auxiliary combustion chambers 1 and 2 is reduced. The purpose of the present invention is to provide a combustion chamber that can improve the mixing and combustion of fuel and air in the main combustion chamber by reducing the The sub-combustion chamber is equipped with a fuel injection valve and a sub-chamber nozzle opening into the main combustion chamber.
この場合は、各副燃焼室から流出したガス噴流は、同一
回転方向かつシリンダ中心線に対し軸対称な旋回流とな
るため、主燃焼室内で短時間で主燃焼室内の空気と未燃
燃料が混合するので、副室噴口の通路面積を大きくでき
る。In this case, the gas jets flowing out from each sub-combustion chamber form a swirling flow that is in the same rotational direction and axially symmetrical with respect to the cylinder centerline, so that the air in the main combustion chamber and the unburned fuel are quickly combined within the main combustion chamber. Since they are mixed, the passage area of the subchamber nozzle can be increased.
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１図は本発明による第１実施例の燃焼室の第２図のＩ
−１線に沿う断面図、第２図は第１図の主燃焼室を示す
平面図である。FIG. 1 shows I of FIG. 2 of the combustion chamber of the first embodiment according to the present invention.
2 is a sectional view taken along line -1, and FIG. 2 is a plan view showing the main combustion chamber of FIG. 1.
図において、シリンダヘッド４内に複数個の副 ］燃
焼室２が設置されている。副燃焼室が２個の場合を示す
。In the figure, a plurality of auxiliary combustion chambers 2 are installed within a cylinder head 4. The case where there are two auxiliary combustion chambers is shown.
副燃焼室２の形状は２円柱状２円錐台、半球状及びこれ
らを変形して組合せたもの、あるいに球形を変形したも
の等があるが９図には前者の場合を示す。The shape of the auxiliary combustion chamber 2 may be two cylinders, two truncated cones, a hemisphere, a modified combination of these, or a modified spherical shape, and FIG. 9 shows the former case.
各副燃焼室２には燃料噴射弁５が設置されており、また
機関の始動時に副燃焼室内を予熱するグロープラグ６（
第７図参照）を必要に応じて設置する。A fuel injection valve 5 is installed in each auxiliary combustion chamber 2, and a glow plug 6 (
(see Figure 7) are installed as necessary.
各副燃焼室２は各１個の副室噴口３を介してピストン７
０頂面、シリンダ８．シリンダヘッド４の下面から構成
される主燃焼室１に連通している。Each auxiliary combustion chamber 2 is connected to the piston 7 through one auxiliary chamber nozzle 3.
0 top surface, cylinder 8. It communicates with the main combustion chamber 1 formed from the lower surface of the cylinder head 4 .
ピストン７の頂面の主燃焼室１は円柱状あるいはこれを
変形したキャビティが設置されている。The main combustion chamber 1 on the top surface of the piston 7 has a cylindrical cavity or a cavity formed by modifying the cylindrical shape.
各副燃焼室２から流出してきたガス噴流Ｊはこのキャビ
ティ内で同一回転方向の旋回流を形成すべく、各副燃焼
室２の副室噴口３はシリンダ中心線Ａ−Ａに対しほぼ軸
対称に設置されている。The sub-chamber nozzle 3 of each sub-combustion chamber 2 is approximately axially symmetrical with respect to the cylinder center line A-A so that the gas jet flow J flowing out from each sub-combustion chamber 2 forms a swirling flow in the same rotational direction within this cavity. It is installed in
上記構成の場合の作用について述べる。The operation in the case of the above configuration will be described.
本発明による燃焼室にすると、各副燃焼室２から流出し
てきたガス噴流Ｊはピストン７頂面のキャビティ内（主
燃焼室１内）で、同一回転方向かつシリンダ中心線Ａ−
Ａに対しほぼ軸対称左旋回流となるため、短時間で主燃
焼室１内の空気と未燃燃料が混合するので、副室噴口３
の通路面積を大きくできる。また、副燃焼室２内の未燃
燃料は副燃焼室２内の燃焼ガスにより活性化されている
。In the combustion chamber according to the present invention, the gas jet J flowing out from each auxiliary combustion chamber 2 is rotated in the same rotational direction and at the cylinder center line A-
Since the flow is almost axially symmetrical to the left with respect to A, the air in the main combustion chamber 1 and unburned fuel mix in a short time, so that the air in the sub-chamber nozzle 3
The passage area can be increased. Further, the unburned fuel in the sub-combustion chamber 2 is activated by the combustion gas in the sub-combustion chamber 2.
効果については後述する。The effects will be discussed later.
第３図は本発明による第２実施例の燃焼室を示す第４図
の■−■線に沿う断面図、第４図は第３図の主燃焼室を
示す平面図である。3 is a sectional view taken along the line ■--■ in FIG. 4 showing a combustion chamber according to a second embodiment of the present invention, and FIG. 4 is a plan view showing the main combustion chamber in FIG. 3.
第１実施例において各副燃焼室２に対応してピストン７
頂面に複数個のキャビティを設置した場合である。In the first embodiment, the piston 7 corresponds to each auxiliary combustion chamber 2.
This is a case where multiple cavities are installed on the top surface.
作用、効果は第１実施例とほぼ同様であるが。The operation and effect are almost the same as in the first embodiment.
ピストン７頂面のキャビティの外側の空気利用率が向上
する・
第５図は本発明による第３実施例の燃焼室の第６図のｖ
−ｖ線に沿う断面図、第６図は第５図の主燃焼室を示す
平面図である。The air utilization efficiency outside the cavity on the top surface of the piston 7 is improved. Figure 5 shows the combustion chamber of the third embodiment according to the present invention.
6 is a sectional view taken along line -v, and FIG. 6 is a plan view showing the main combustion chamber of FIG. 5.
第１実施例において、各副燃焼室の副室噴口３の数を複
数個にした場合であり、第５図には２噴口の場合を示す
。In the first embodiment, the number of the sub-chamber nozzles 3 in each sub-combustion chamber is plural, and FIG. 5 shows the case where there are two nozzles.
作用、効果は第１実施例とほぼ同様であるが。The operation and effect are almost the same as in the first embodiment.
副燃焼室２から主燃焼室１へのガス噴流の分散性が向上
できる。The dispersibility of the gas jet from the sub-combustion chamber 2 to the main combustion chamber 1 can be improved.
第１実施例に示すように２本発明の燃焼システムにする
ことにより、主燃焼室１内の燃料と空気の混合気形成２
着火、燃焼を促進し、副室噴口での絞り損失、燃焼室内
での熱損失を低減でき、燃費、吐煙が改善されると共に
２機関の低騒音化。As shown in the first embodiment, by using the combustion system of the present invention, a mixture of fuel and air is formed in the main combustion chamber 1.
It promotes ignition and combustion, reduces throttling loss at the pre-chamber nozzle and heat loss in the combustion chamber, improves fuel efficiency and smoke emissions, and reduces the noise of the two engines.
Ｎ０ｘ−ＨＣ低減、高速化を実現することができる。It is possible to reduce NOx-HC and increase speed.
第１図は本発明による第１実施例の燃焼室の第２図のＴ
−、Ｉ線に沿う断面図、第２図は第１図の主燃焼室を示
す平面図、第３図は本発明による第２実施例の燃焼室の
第４図の■−■線に沿う断面図、第４図は第３図の主燃
焼室を示す平面図、第５図は本発明による第３実施例の
燃焼室の第６図のＶ−Ｖ線に沿う断面図、第６図は第５
図の主燃焼室を示す平面図、第７図は従来の燃焼室の第
８図の■−■線に沿う断面図、第８図は第７図の主燃焼
室を示す平面図である。
１・・・主燃焼室、２・・・副燃焼室、３・・・副室噴
口。
４・・・シリンダヘッド、５・・・燃料噴射弁、７・・
・ピストン、８・・・シリンダ。
１艷０４（イ）・寸〔ｉ■
Ａ
求５図
井６霞
７１＝７０
津８０FIG. 1 shows T in FIG. 2 of the combustion chamber of the first embodiment according to the present invention.
2 is a plan view showing the main combustion chamber of FIG. 1, and FIG. 3 is a sectional view taken along the line ■-■ of FIG. 4 of the combustion chamber of the second embodiment according to the present invention. 4 is a plan view showing the main combustion chamber of FIG. 3; FIG. 5 is a sectional view taken along line V-V in FIG. 6 of the combustion chamber of the third embodiment of the present invention; FIG. is the fifth
FIG. 7 is a sectional view of a conventional combustion chamber taken along the line ■--■ in FIG. 8, and FIG. 8 is a plan view showing the main combustion chamber in FIG. 7. 1... Main combustion chamber, 2... Sub-combustion chamber, 3... Sub-chamber nozzle. 4... Cylinder head, 5... Fuel injection valve, 7...
・Piston, 8... cylinder. 1 艷 04 (I)・Size〔i■ A Request 5 Zu well 6 Kasumi 71 = 70 Tsu 80
Claims (1)
数個の副燃焼室を設けると共に、上記各副燃焼室に燃料
噴射弁及び主燃焼室に開口する副室噴口を備えたことを
特徴とする内燃機関の燃焼室。1. In the combustion chamber of the internal combustion engine, a plurality of auxiliary combustion chambers are provided in the cylinder head, and each of the auxiliary combustion chambers is provided with a fuel injection valve and an auxiliary chamber nozzle opening into the main combustion chamber. Combustion chamber of an internal combustion engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59226730A JPS61106914A (en) | 1984-10-30 | 1984-10-30 | Combustion chamber in internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59226730A JPS61106914A (en) | 1984-10-30 | 1984-10-30 | Combustion chamber in internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61106914A true JPS61106914A (en) | 1986-05-24 |
| JPH0584365B2 JPH0584365B2 (en) | 1993-12-01 |
Family
ID=16849709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59226730A Granted JPS61106914A (en) | 1984-10-30 | 1984-10-30 | Combustion chamber in internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61106914A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03141818A (en) * | 1989-10-25 | 1991-06-17 | Niigata Eng Co Ltd | Multiple pre-combustion chamber type engine |
| JPH03168320A (en) * | 1989-11-09 | 1991-07-22 | Cooper Ind Inc | Combustion equipment for dual gas/liquid fuel engine, and method for combustion thereof |
| KR100643823B1 (en) | 2004-04-29 | 2006-11-10 | 엠에이엔 비앤드떠블유 디젤 에이/에스 | Crosshead diesel engines with cylinders with combustion chambers and fuel injection methods for such engines |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD509025S1 (en) | 2004-06-09 | 2005-08-30 | American Safety Razor Company | Razor |
| USD527491S1 (en) | 2004-06-09 | 2006-08-29 | American Safety Razor Company | Razor lube bar |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51141704U (en) * | 1975-05-09 | 1976-11-15 | ||
| JPS575913U (en) * | 1980-06-11 | 1982-01-12 |
-
1984
- 1984-10-30 JP JP59226730A patent/JPS61106914A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51141704U (en) * | 1975-05-09 | 1976-11-15 | ||
| JPS575913U (en) * | 1980-06-11 | 1982-01-12 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03141818A (en) * | 1989-10-25 | 1991-06-17 | Niigata Eng Co Ltd | Multiple pre-combustion chamber type engine |
| JPH03168320A (en) * | 1989-11-09 | 1991-07-22 | Cooper Ind Inc | Combustion equipment for dual gas/liquid fuel engine, and method for combustion thereof |
| KR100643823B1 (en) | 2004-04-29 | 2006-11-10 | 엠에이엔 비앤드떠블유 디젤 에이/에스 | Crosshead diesel engines with cylinders with combustion chambers and fuel injection methods for such engines |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0584365B2 (en) | 1993-12-01 |
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