JPH0584365B2 - - Google Patents
Info
- Publication number
- JPH0584365B2 JPH0584365B2 JP59226730A JP22673084A JPH0584365B2 JP H0584365 B2 JPH0584365 B2 JP H0584365B2 JP 59226730 A JP59226730 A JP 59226730A JP 22673084 A JP22673084 A JP 22673084A JP H0584365 B2 JPH0584365 B2 JP H0584365B2
- Authority
- JP
- Japan
- Prior art keywords
- combustion chamber
- chamber
- sub
- auxiliary
- main
- 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
- 238000002485 combustion reaction Methods 0.000 claims description 80
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000000446 fuel Substances 0.000 description 18
- 239000007789 gas Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression 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
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000779 smoke 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)
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３図、第４図に
示す。図において、シリンダヘツド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、円柱状、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３図、第４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. 3 and 4. In the figure, one auxiliary combustion chamber 2 is installed within a cylinder head 4. The shape of the auxiliary combustion chamber 2 may be a cylinder, a truncated cone, a hemisphere, a modified combination of these, or a modified spherical shape, but FIGS. 3 and 4 show the former case. An example is shown.
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７の頂面、シリンダ８、シリンダヘツ
ド４の下面から構成される主燃料室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、図には２個の場合を示す。また、ピスト
ン７の頂面には副室噴口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 communicates with the main fuel chamber 1, which is comprised of the top surface of the piston 7, the cylinder 8, and the lower surface of the cylinder head 4, via the auxiliary chamber nozzle 3. There may be one or more subchamber nozzles 3, but the figure shows a case where there are two. Further, on the top surface of the piston 7, a main combustion chamber 1 corresponding to the sub-chamber nozzle 3 is provided.
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、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
焼質２内の未燃燃料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壁の壁面に沿つて分散する。 During the compression stroke during engine operation, air in the main combustion chamber 1 is compressed by the piston 7 and flows into the auxiliary combustion chamber 2 through the auxiliary chamber nozzle 3 . When fuel is injected from the fuel injection valve 5, the fuel mixes with the air in the auxiliary combustion chamber 2, ignites, and burns. 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 fuel in the secondary combustion material 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
沿つ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 within 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し、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 in the main combustion chamber 1 become large, resulting in poor fuel efficiency.
本発明の目的は上記の点に着目し、副室式機関
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、ピストン頂面にキヤビテイ状の主燃焼室
をシリンダ中心線と同芯に形成し、前記主燃焼室
内に副燃焼室の副室噴口部分を突出させ、前記主
燃焼室内に副室副口からのガス噴流により同一回
転方向の旋回流を発生させる内燃機関の燃焼室に
おいて、２個の副燃焼室を前記主燃焼室内の周辺
部に且つシリンダ中心線に対して軸対称に配置
し、各副燃焼室に複数個の副室噴口をシリンダ中
心線に対して軸対称に且つ各副室噴口の噴出方向
が前記旋回流と同一回転方向になるように配置し
たことである。
The purpose of the present invention focuses on the above points, and in order to improve the fuel efficiency of a pre-chamber type engine, the purpose of the present invention is to reduce the throttling loss of the pre-chamber nozzle, reduce the heat loss of the main and sub-combustion chambers 1 and 2, and improve the fuel efficiency of the pre-chamber engine. The purpose of the present invention is to provide a combustion chamber that can improve the mixing and combustion of indoor fuel and air.The main feature of this combustion chamber is that a cavity-shaped main combustion chamber is formed on the top surface of the piston concentrically with the cylinder centerline. In the combustion chamber of an internal combustion engine, a sub-chamber nozzle portion of a sub-combustion chamber protrudes into the main combustion chamber, and a swirling flow in the same rotational direction is generated in the main combustion chamber by a gas jet from the sub-chamber sub-port. A combustion chamber is disposed in a peripheral portion of the main combustion chamber and axially symmetrical with respect to the cylinder center line, and each sub-combustion chamber has a plurality of sub-chamber nozzles arranged axially symmetrically with respect to the cylinder center line and each sub-chamber nozzle. The jetting direction is the same direction of rotation as the swirling flow.
この場合は、各副燃焼室から流出したガス噴流
は、同一回転方向の旋回流となるため、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 become swirling flows in the same rotational direction, so the air in the main combustion chamber and unburned fuel mix within a short time, so the nozzle of the sub-chamber The passage area 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図は本発明による実施例の燃焼室の第２図
の−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 is a sectional view taken along the - line in FIG. 2 of a combustion chamber according to an embodiment of the present invention, and FIG. 2 is a plan view showing the main combustion chamber of FIG. 1.
図において、シリンダヘツド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、円柱状、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、図には前者の場合
を示す。 The shape of the auxiliary combustion chamber 2 may be a cylinder, a truncated cone, a hemisphere, a modified combination of these, or a modified spherical shape, and the figure 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 FIG. 7) for preheating the inside of the auxiliary combustion chamber at the time of starting the engine is installed as necessary.
各副燃焼室２は複数個の副室噴口３を介してピ
ストン７の頂面、シリンダ８、シリンダヘツド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 top surface of the piston 7, the cylinder 8, and the cylinder head 4 through a plurality of auxiliary chamber nozzles 3.
It communicates with the main combustion chamber 1, which is formed from the lower surface of the combustion chamber.
ピストン７の頂面の主燃焼室１は円柱状あるいは
これを変形したキヤビテイが設置されている。各
副燃焼室２から流出してきたガス噴流Ｊはこのキ
ヤビテイ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を配置している。The main combustion chamber 1 on the top surface of the piston 7 is provided with a cylindrical or modified cavity. The sub-chamber jet ports 3 of each sub-combustion chamber 2 are arranged so that the gas jet J flowing out from each sub-combustion chamber 2 forms a swirling flow in the same rotational direction within this cavity.
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
ヤビテイ内（主燃焼室１内）で、同一回転方向の
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、各副燃焼室の副室噴口
３は複数個であるため、副燃焼室２から主燃焼室
１へのガス噴流の分散性を向上できる。 With the combustion chamber according to the present invention, the gas jet flow J flowing out from each auxiliary combustion chamber 2 becomes a swirling flow in the same rotational direction within the cavity on the top surface of the piston 7 (inside the main combustion chamber 1), so that it can be quickly Since the air in the main combustion chamber 1 and the unburned fuel are mixed, the passage area of the sub-chamber nozzle 3 can be increased. Moreover, since each sub-combustion chamber has a plurality of sub-chamber injection ports 3, the dispersibility of the gas jet from the sub-combustion chamber 2 to the main combustion chamber 1 can be improved.
実施例に示すように、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、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、機関の低騒音化、
NOX・HC低減、高速化を実現することができ
る。
As shown in the examples, the combustion system of the present invention promotes the formation of a mixture of fuel and air in the main combustion chamber 1, ignition, and combustion, and reduces the throttling loss at the pre-chamber nozzle and the combustion inside the combustion chamber. Reduces heat loss, improves fuel efficiency,
In addition to improving smoke emissions, engine noise is reduced.
It is possible to reduce NO X and HC and increase speed.
第１図は本発明による実施例の燃焼室の第２図
の−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図は従来の燃焼室の第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である。
１……主燃焼室、２……副燃焼室、３……副室
噴口、４……シリンダヘツド、５……燃料噴射
弁、７……ピストン、８……シリンダ。
FIG. 1 is a sectional view taken along the - line in FIG. 2 of a combustion chamber according to an embodiment of the present invention, FIG. 2 is a plan view showing the main combustion chamber of FIG. 1, and FIG. 3 is a cross-sectional view of a conventional combustion chamber. 4
4 is a sectional view taken along the - line in the figure, and FIG. 4 is a plan view showing the main combustion chamber of FIG. 3. 1... Main combustion chamber, 2... Sub-combustion chamber, 3... Sub-chamber nozzle, 4... Cylinder head, 5... Fuel injection valve, 7... Piston, 8... Cylinder.
Claims (1)
リンダ中心線と同芯に形成し、前記主燃焼室内に
副燃焼室の副室噴口部分を突出させ、前記主燃焼
室内に副室副口からのガス噴流により同一回転方
向の旋回流を発生させる内燃機関の燃焼室におい
て、２個の副燃焼室を前記主燃焼室内の周辺部に
且つシリンダ中心線に対して軸対称に配置し、各
副燃焼室に複数個の副室噴口をシリンダ中心線に
対して軸対称に且つ各副室噴口の噴出方向が前記
旋回流と同一回転方向になるように配置したこと
を特徴とする内燃機関の燃焼室。1. A cavity-shaped main combustion chamber is formed on the top surface of the piston so as to be concentric with the cylinder center line, and the sub-chamber nozzle part of the sub-combustion chamber is made to protrude into the main combustion chamber, and the sub-chamber injection port from the sub-chamber sub-port is formed in the main combustion chamber. In a combustion chamber of an internal combustion engine that generates a swirling flow in the same rotational direction by a gas jet, two auxiliary combustion chambers are arranged at the periphery of the main combustion chamber and axially symmetrical with respect to the cylinder center line, and each auxiliary combustion chamber A combustion chamber for an internal combustion engine, characterized in that a plurality of sub-chamber nozzles are arranged in the chamber axially symmetrically with respect to a cylinder center line, and the ejection direction of each sub-chamber nozzle is in the same rotational direction as the swirling flow. .
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 JPS61106914A (en) | 1986-05-24 |
| JPH0584365B2 true 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) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0747931B2 (en) * | 1989-10-25 | 1995-05-24 | 株式会社新潟鐵工所 | Multiple pre-combustion chamber type internal combustion engine |
| US4966103A (en) * | 1989-11-09 | 1990-10-30 | Cooper Industries, Inc. | Combustion system for dual fuel engine |
| KR100643823B1 (en) | 2004-04-29 | 2006-11-10 | 엠에이엔 비앤드떠블유 디젤 에이/에스 | A crosshead Diesel engine having cylinders with combustion chambers, and a method of injecting fuel in such engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS575913B2 (en) * | 1975-07-31 | 1982-02-02 |
Family Cites Families (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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS575913B2 (en) * | 1975-07-31 | 1982-02-02 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61106914A (en) | 1986-05-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |