JPH06336931A - Combustion chamber for auxiliary chamber type internal combustion engine - Google Patents
Combustion chamber for auxiliary chamber type internal combustion engineInfo
- Publication number
- JPH06336931A JPH06336931A JP14980193A JP14980193A JPH06336931A JP H06336931 A JPH06336931 A JP H06336931A JP 14980193 A JP14980193 A JP 14980193A JP 14980193 A JP14980193 A JP 14980193A JP H06336931 A JPH06336931 A JP H06336931A
- Authority
- JP
- Japan
- Prior art keywords
- combustion chamber
- auxiliary
- fuel
- chamber
- nozzle
- 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
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】副室式内燃機関の燃焼室に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion chamber of an internal combustion engine of a sub chamber type.
【０００２】[0002]
【従来の技術】図６は従来形の副室式機関の燃焼室の断
面図を示し、その副燃焼室２の上部には燃料噴射ノズル
５が設置されている。前記副燃焼室の形状は上部が半球
形のもの、円錐台のもの、円柱形のもの等があるが図６
は円柱形のものを示す。なお１はピストン、３は噴口、
４はシリンダヘッド、６はピストン、ｆ1 は燃料噴霧、
θは噴霧角である。2. Description of the Related Art FIG. 6 shows a sectional view of a combustion chamber of a conventional auxiliary chamber type engine, in which a fuel injection nozzle 5 is installed above the auxiliary combustion chamber 2. As for the shape of the auxiliary combustion chamber, there are a hemispherical upper portion, a truncated cone shape, a columnar shape and the like.
Indicates a cylindrical shape. 1 is a piston, 3 is a nozzle,
4 is a cylinder head, 6 is a piston, f 1 is fuel spray,
θ is the spray angle.
【０００３】図７は従来の燃焼室に設置されているピン
形の燃料噴射ノズルの縦断面図である。ノズルニードル
５４の先端がノズルボディ５１の噴口５２にゆるく挿入
され、燃料はノズルニードル５４の先端と噴口５２との
間の輪状のすきまより噴射される。FIG. 7 is a vertical cross-sectional view of a pin-shaped fuel injection nozzle installed in a conventional combustion chamber. The tip of the nozzle needle 54 is loosely inserted into the nozzle 52 of the nozzle body 51, and the fuel is injected from the annular clearance between the tip of the nozzle needle 54 and the nozzle 52.
【０００４】[0004]
【発明が解決しようとする課題】ところが、従来の技術
では、燃料噴射角θを小さくすると燃料の副燃焼室壁へ
の付着防止と副燃焼室２から主燃焼室１への流出促進が
図られるが、副燃焼室２の上部空気が十分に利用できず
副燃焼室２内の燃焼は悪化する。However, in the prior art, when the fuel injection angle θ is made small, the fuel is prevented from adhering to the auxiliary combustion chamber wall and the outflow from the auxiliary combustion chamber 2 to the main combustion chamber 1 is promoted. However, the upper air in the auxiliary combustion chamber 2 cannot be fully utilized, and the combustion in the auxiliary combustion chamber 2 deteriorates.
【０００５】又副燃焼室２内での燃焼悪化のため、主燃
焼室１内での混合気形成及び燃焼促進に必要なエネルギ
が確保できず、燃焼が悪化し、燃費、吐煙が悪化する。
また燃料噴射角θを大きくした場合、副燃焼室２内での
空気利用率は高められるが、燃料の副燃焼室２壁面への
付着、副燃焼室２から主燃焼室１への流出が遅延し、吐
煙、燃費は悪化する。Further, since the combustion in the auxiliary combustion chamber 2 is deteriorated, the energy required for forming the air-fuel mixture and promoting combustion in the main combustion chamber 1 cannot be secured, so that the combustion is deteriorated and the fuel consumption and smoke are deteriorated. .
Further, when the fuel injection angle θ is increased, the air utilization rate in the auxiliary combustion chamber 2 is increased, but the adhesion of fuel to the wall surface of the auxiliary combustion chamber 2 and the outflow from the auxiliary combustion chamber 2 to the main combustion chamber 1 are delayed. However, smoke emission and fuel consumption deteriorate.
【０００６】本発明の目的は前記従来装置の問題点を解
消し、副燃焼室上部の空気利用率の上昇がはかるととも
に、副燃焼室壁面への燃料の付着防止と燃料の副燃焼室
から主燃焼室への流出促進が図られ、主燃焼室１内の燃
料と空気の混合気形成および燃焼が促進され、燃費、吐
煙が改善される副室式内燃機関の燃焼室を提供するにあ
る。The object of the present invention is to solve the above problems of the conventional device, to increase the air utilization rate in the upper part of the auxiliary combustion chamber, to prevent the fuel from adhering to the wall surface of the auxiliary combustion chamber, and to prevent the fuel from the auxiliary combustion chamber. The purpose of the present invention is to provide a combustion chamber of an internal combustion engine of the sub-chamber type in which outflow to the combustion chamber is promoted, formation of a mixture of fuel and air in the main combustion chamber 1 and combustion are promoted, and fuel consumption and smoke are improved. .
【０００７】[0007]
【課題を解決するための手段】本発明に係る副室式内燃
機関の燃焼室は、１個あるいは複数個の副室噴口を介し
て主燃焼室と連通し上部には燃料噴射ノズルが設置され
ている副燃焼室において、前記副燃焼室内に設けられた
燃料噴射ノズルの主噴口５２のまわりに複数の補助噴口
５３を設け、該複数の補助噴口から噴出する燃料噴霧の
うちの１つが副燃焼室内のグロープラグ８に接触するよ
うに配置されたことを特徴としている。A combustion chamber of an internal combustion engine of a sub-chamber type according to the present invention communicates with the main combustion chamber via one or a plurality of sub-chamber nozzles, and a fuel injection nozzle is installed in the upper portion. In the auxiliary combustion chamber, the auxiliary injection holes 53 are provided around the main injection hole 52 of the fuel injection nozzle provided in the auxiliary combustion chamber, and one of the fuel sprays ejected from the auxiliary injection holes is the auxiliary combustion chamber. It is characterized in that it is arranged so as to contact the glow plug 8 in the room.
【０００８】[0008]
【作用】本発明の燃焼室では複数個の補助噴口５３から
噴出する燃料噴霧ｆ2 により副燃焼室２の上部空気利用
率を高めることができ、副燃焼室２内の燃焼が促進され
るとともに、主噴口５２から噴出される燃料噴霧ｆ1 の
噴霧角θを小さくとれるため、燃料の副燃焼室２壁面へ
の付着、副燃焼室２から主燃焼室１への流出促進が図ら
れる。In the combustion chamber of the present invention, the fuel spray f 2 ejected from the plurality of auxiliary injection holes 53 can increase the utilization ratio of the upper air in the auxiliary combustion chamber 2 and promote the combustion in the auxiliary combustion chamber 2. Since the spray angle θ of the fuel spray f 1 ejected from the main injection port 52 can be made small, the fuel adheres to the wall surface of the auxiliary combustion chamber 2 and the outflow of the auxiliary combustion chamber 2 to the main combustion chamber 1 is promoted.
【０００９】さらに前記複数の補助噴口５３のうちの１
個から噴出する燃料ｆ21がグロープラグ８に接触するよ
う配置しているので、始動性が向上すると共に、副燃焼
室２の上部、即ち主噴口５２から噴出する燃料噴霧ｆ1
の背後で着火させ、該燃料噴霧ｆ1 の主燃焼室１への流
出が促進される。Further, one of the plurality of auxiliary injection holes 53
Since the fuel f 21 ejected from the individual pieces is arranged so as to come into contact with the glow plug 8, the startability is improved, and at the same time, the fuel spray f 1 ejected from the upper portion of the auxiliary combustion chamber 2, that is, the main injection port 52.
Is ignited in the back of the fuel to accelerate the outflow of the fuel spray f 1 into the main combustion chamber 1.
【００１０】[0010]
【実施例】以下図１〜５を参照し本発明の一実施例につ
いて説明する。図１は本発明に係る副室式内燃機関の燃
焼室廻りの断面図、図２は本発明の副燃焼室に使用され
る燃料噴射ノズルの断面図、図３は図２のＡ部拡大図、
図４は図３に示すＡ部拡大図の下面図で補助噴口の形状
を円形とした第１実施例であり、図５は図４での円形噴
射口をだ円形とした第２実施例である。An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view around a combustion chamber of a sub-chamber internal combustion engine according to the present invention, FIG. 2 is a cross-sectional view of a fuel injection nozzle used in the sub-combustion chamber of the present invention, and FIG. 3 is an enlarged view of part A of FIG. ,
FIG. 4 is a bottom view of the enlarged view of part A shown in FIG. 3 and shows a first embodiment in which the auxiliary nozzle has a circular shape, and FIG. 5 shows a second embodiment in which the circular nozzle in FIG. is there.
【００１１】副燃焼室２の形状はその上部が半球形のも
の、円錐台のもの、円柱形のもの等があるが図１のもの
は円柱状のものである。本発明の副燃焼室２の上部に配
設された燃料噴射ノズル５にはノズルチップがキャップ
を介して締着されている。該ノズルチップではノズルニ
ードル５４の先端がノズルボディ５１の噴口にゆるく嵌
入しており、燃料がノズルニードル５４の先端と前記噴
口との間の輪状のすきまより噴射されるピントル型の主
噴口５２を形成し、又図３に示すように該主噴口を中心
としてその外周にはノズルボディ５１のシート面又はシ
ート面下流側からノズルボディ５１の下端面へ連通する
複数個の補助噴口５３が設けられている。又該補助噴口
５３のうちの１つから噴出する燃料噴霧がグロープラグ
８に接触するように配置されている。The sub-combustion chamber 2 may have a hemispherical shape, a truncated cone shape, a cylindrical shape or the like at the upper portion thereof, but the shape of FIG. 1 is a cylindrical shape. A nozzle tip is fastened via a cap to the fuel injection nozzle 5 arranged above the auxiliary combustion chamber 2 of the present invention. In the nozzle tip, the tip of the nozzle needle 54 is loosely fitted in the nozzle of the nozzle body 51, and the pintle type main nozzle 52 is injected from the annular gap between the tip of the nozzle needle 54 and the nozzle. Further, as shown in FIG. 3, a plurality of auxiliary injection holes 53 are provided on the outer periphery of the main injection hole as the center, which communicates from the seat surface of the nozzle body 51 or the seat surface downstream side to the lower end surface of the nozzle body 51. ing. Further, the fuel spray ejected from one of the auxiliary injection holes 53 is arranged so as to come into contact with the glow plug 8.
【００１２】次に前記実施例の作用について説明する。
複数個の補助噴口５３よりの噴出する燃料噴霧ｆ2 によ
り副燃焼室２、特に上部の空気利用率を高めることがで
き副燃焼室２内の燃焼が促進されると共に、主噴口５２
から噴出する燃料噴霧ｆ1 の噴霧角θを小さくできるの
で燃料の副燃焼室２の壁面への付着が防止され、副燃焼
室２から主燃焼室１への流出促進がはかられる。Next, the operation of the above embodiment will be described.
Due to the fuel spray f 2 ejected from the plurality of auxiliary injection holes 53, the air utilization rate of the auxiliary combustion chamber 2, particularly the upper part, can be increased and combustion in the auxiliary combustion chamber 2 is promoted, and at the same time, the main injection nozzle 52
Since the spray angle θ of the fuel spray f 1 ejected from the can be made small, the fuel is prevented from adhering to the wall surface of the auxiliary combustion chamber 2, and the outflow from the auxiliary combustion chamber 2 to the main combustion chamber 1 is promoted.
【００１３】さらに前記複数の補助噴口５３のうちの１
つから噴出する燃料噴霧ｆ2 がグロープラグ８に接触す
るように配置したので、始動性が向上し、副燃焼室２の
上部で着火するので、主噴口５２から噴出する燃料噴霧
ｆ1 の背後で着火することになり、燃料噴霧ｆ1 の主燃
焼室１への流出が促進され、主燃焼室１内での燃料と空
気の混合気形成及び燃焼が促進され、燃費と吐煙が減少
する。Further, one of the plurality of auxiliary nozzles 53
Since the fuel spray f 2 ejected from one of the two is arranged so as to come into contact with the glow plug 8, the startability is improved and the fuel is ignited in the upper part of the auxiliary combustion chamber 2, so that the fuel spray f 1 ejected from the main injection port 52 The fuel spray f 1 is promoted to flow out into the main combustion chamber 1, and the formation and combustion of a mixture of fuel and air in the main combustion chamber 1 are promoted, which reduces fuel consumption and smoke emission. .
【００１４】[0014]
【発明の効果】本発明の副室式内燃機関の燃焼室は前記
とおり構成したので複数個の補助噴口５３から噴出する
燃料噴霧ｆ2 により副燃焼室２、特にその上部の空気利
用率が向上し、副燃焼室２内の燃焼が促進される。さら
に複数個の補助噴口５３のうちの１つから噴出する燃料
噴霧ｆ21をグロープラグ８に接触するように構成したの
で、始動が容易化するとともに、副燃焼室２の上部で着
火することにより主噴口５２から噴出する燃料噴霧ｆ1
の背後で着火することになる。Since the combustion chamber of the sub-chamber type internal combustion engine of the present invention is configured as described above, the fuel spray f 2 ejected from the plurality of auxiliary injection holes 53 improves the air utilization rate of the sub-combustion chamber 2, particularly the upper portion thereof. Then, the combustion in the auxiliary combustion chamber 2 is promoted. Further, since the fuel spray f 21 ejected from one of the plurality of auxiliary injection holes 53 is configured to come into contact with the glow plug 8, starting is facilitated and ignition is performed in the upper portion of the auxiliary combustion chamber 2. Fuel spray f 1 ejected from the main nozzle 52
Will ignite behind.
【００１５】さらに主噴口５２から噴出される燃料噴霧
ｆ1 の噴霧角θを小さくとれるため、燃料の副燃焼室２
壁面への付着防止と、燃料の副燃焼室２からの主燃焼室
１への流出促進が図られる。従って主燃焼室１内での燃
料と空気の混合気形成と燃焼が促進され燃費と吐煙が減
少する。Furthermore, since the spray angle θ of the fuel spray f 1 ejected from the main injection port 52 can be made small, the fuel sub combustion chamber 2
Prevention of adhesion to the wall surface and promotion of outflow of fuel from the auxiliary combustion chamber 2 to the main combustion chamber 1 are achieved. Therefore, the formation and combustion of the mixture of fuel and air in the main combustion chamber 1 are promoted, and fuel consumption and smoke emission are reduced.
【図１】本発明の第１実施例に係る燃焼室の縦断面図FIG. 1 is a vertical sectional view of a combustion chamber according to a first embodiment of the present invention.
【図２】本発明の燃焼室に設けられた燃料噴射ノズルの
縦断面図FIG. 2 is a vertical cross-sectional view of a fuel injection nozzle provided in the combustion chamber of the present invention.
【図３】図２のＡ部拡大図FIG. 3 is an enlarged view of part A of FIG.
【図４】本発明の第１実施例の下面図FIG. 4 is a bottom view of the first embodiment of the present invention.
【図５】同第２実施例の下面図FIG. 5 is a bottom view of the second embodiment.
【図６】従来例の図１応当図FIG. 6 is a prior art example of FIG. 1.
【図７】従来例の図２応当図FIG. 7 is a diagram of FIG. 2 of a conventional example.
１…主燃焼室、２…副燃焼室、５…燃料噴射ノズル、８
…グロープラグ、５１…ノズルボディ、５２…主噴口、
５３…補助噴口、５４…ノズルニードル、ｆ1，ｆ2 …
燃料噴霧、Ｂ−Ｂ…ノズルボディ下端面。1 ... Main combustion chamber, 2 ... Sub combustion chamber, 5 ... Fuel injection nozzle, 8
... glow plug, 51 ... nozzle body, 52 ... main injection port,
53 ... auxiliary nozzle hole, 54 ... nozzle needle, f 1, f 2 ...
Fuel spray, BB ... Lower end surface of nozzle body.
Claims (1)
主燃焼室と連通し上部には燃料噴射ノズルが設置されて
いる副燃焼室において、前記副燃焼室内に設けられた燃
料噴射ノズルの主噴口（５２）のまわりに複数の補助噴
口（５３）を設け、該複数の補助噴口から噴出する燃料
噴霧のうちの１つが副燃焼室内のグロープラグ（８）に
接触するように配置されたことを特徴とする副室式内燃
機関の燃焼室。1. In a sub-combustion chamber, which is in communication with the main combustion chamber through one or a plurality of sub-chamber nozzles and has a fuel injection nozzle in the upper portion, the fuel injection nozzle provided in the sub-combustion chamber. A plurality of auxiliary nozzles (53) are provided around the main nozzle (52), and one of the fuel sprays ejected from the plurality of auxiliary nozzles is arranged so as to contact the glow plug (8) in the auxiliary combustion chamber. A combustion chamber of a sub-chamber type internal combustion engine, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14980193A JP3263487B2 (en) | 1993-05-31 | 1993-05-31 | Combustion chamber of subchamber internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14980193A JP3263487B2 (en) | 1993-05-31 | 1993-05-31 | Combustion chamber of subchamber internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06336931A true JPH06336931A (en) | 1994-12-06 |
| JP3263487B2 JP3263487B2 (en) | 2002-03-04 |
Family
ID=15483016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14980193A Expired - Fee Related JP3263487B2 (en) | 1993-05-31 | 1993-05-31 | Combustion chamber of subchamber internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3263487B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001227344A (en) * | 2000-02-14 | 2001-08-24 | Mitsubishi Heavy Ind Ltd | Nozzle hole structure of torch ignition-type gas engine |
| DK179146B1 (en) * | 2016-12-13 | 2017-12-04 | Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland | Nozzle for fuel valve for injecting fuel into the cylinders of a large turbocharged two-stroke compression-ignited internal combustion engineand and an engine therefore |
| KR20180068284A (en) * | 2016-12-13 | 2018-06-21 | 맨 디젤 앤드 터보 필리얼 아프 맨 디젤 앤드 터보 에스이 티스크랜드 | Nozzle for fuel valve for injecting fuel into the cylinders of a large turbocharged two-stroke compression-ignited internal combustion engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020134345A1 (en) * | 2001-03-20 | 2002-09-26 | Adams Joseph S. | Combustion chamber system |
-
1993
- 1993-05-31 JP JP14980193A patent/JP3263487B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001227344A (en) * | 2000-02-14 | 2001-08-24 | Mitsubishi Heavy Ind Ltd | Nozzle hole structure of torch ignition-type gas engine |
| DK179146B1 (en) * | 2016-12-13 | 2017-12-04 | Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland | Nozzle for fuel valve for injecting fuel into the cylinders of a large turbocharged two-stroke compression-ignited internal combustion engineand and an engine therefore |
| DK201670987A1 (en) * | 2016-12-13 | 2017-12-04 | Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland | Nozzle for fuel valve for injecting fuel into the cylinders of a large turbocharged two-stroke compression-ignited internal combustion engineand and an engine therefore |
| JP2018096377A (en) * | 2016-12-13 | 2018-06-21 | マン ディーゼル アンド ターボ フィリアル ア マン ディーゼル アンド ターボ エスイー チュスクランＭＡＮ Ｄｉｅｓｅｌ ＆ Ｔｕｒｂｏ，ｆｉｌｉａｌ ａｆ ＭＡＮ Ｄｉｅｓｅｌ ＆ Ｔｕｒｂｏ ＳＥ，Ｔｙｓｋｌａｎｄ | Nozzle for fuel valve for injecting fuel into cylinder of large turbocharged two-stroke compression-ignition internal combustion engine, and engine therefor |
| KR20180068284A (en) * | 2016-12-13 | 2018-06-21 | 맨 디젤 앤드 터보 필리얼 아프 맨 디젤 앤드 터보 에스이 티스크랜드 | Nozzle for fuel valve for injecting fuel into the cylinders of a large turbocharged two-stroke compression-ignited internal combustion engine |
| KR20180068288A (en) * | 2016-12-13 | 2018-06-21 | 맨 디젤 앤드 터보 필리얼 아프 맨 디젤 앤드 터보 에스이 티스크랜드 | A nozzle for fuel valve for injecting fuel into the cylinders of a large turbocharged two-stroke compression-ignited internal combustion engine and an engine therefore |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3263487B2 (en) | 2002-03-04 |
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