JPH0159408B2 - - Google Patents
Info
- Publication number
- JPH0159408B2 JPH0159408B2 JP59193383A JP19338384A JPH0159408B2 JP H0159408 B2 JPH0159408 B2 JP H0159408B2 JP 59193383 A JP59193383 A JP 59193383A JP 19338384 A JP19338384 A JP 19338384A JP H0159408 B2 JPH0159408 B2 JP H0159408B2
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- sub
- sleeve
- chamber member
- air layer
- 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
Links
- 239000002184 metal Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000003566 sealing material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 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
- F02B19/00—Engines characterised by precombustion chambers
- F02B19/16—Chamber shapes or constructions not specific to sub-groups F02B19/02 - F02B19/10
-
- 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
- F02B2019/006—Engines characterised by precombustion chambers with thermal insulation
-
- 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、エンジンの副室構造に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pre-chamber structure of an engine.
（従来技術）
従来、シリンダヘツドの凹部に副室構成部材が
嵌挿され、主燃焼室に噴孔を通じて連通する副室
が構成されたエンジンは知られている。(Prior Art) Conventionally, an engine is known in which a sub-chamber forming member is fitted into a recessed portion of a cylinder head to form a sub-chamber that communicates with a main combustion chamber through a nozzle hole.
例えば実開昭58−148220号公報に、シリンダヘ
ツドの凹部内に、副室を形成するマウスピースを
圧入し、該マウスピースとシリンダヘツドとの間
に断熱空気層としての隙間を形成する構造では、
エンジン運転中のマウスピースの熱膨張によりシ
リンダヘツドが塑性変形して亀裂が発生するとい
う問題を解決するために、マウスピースとシリン
ダヘツドとの間に形成される隙間に、環状のフラ
ンジを有する筒状のカラーを嵌挿し、該カラーの
外周面をシリンダヘツドに、フランジがマウスピ
ースの下部にそれぞれ密接させ、断熱空気層を形
成することが記載されている。 For example, Japanese Utility Model Application No. 58-148220 discloses a structure in which a mouthpiece forming an auxiliary chamber is press-fitted into a recessed portion of a cylinder head, and a gap is formed between the mouthpiece and the cylinder head as an insulating air layer. ,
In order to solve the problem that the cylinder head plastically deforms and cracks due to thermal expansion of the mouthpiece during engine operation, a cylinder with an annular flange is installed in the gap formed between the mouthpiece and the cylinder head. It is described that a collar of the shape of a shape is fitted and the outer peripheral surface of the collar is brought into close contact with the cylinder head and the flange is brought into close contact with the lower part of the mouthpiece to form a heat insulating air layer.
ところが、上述した如き構造では、マウスピー
ス及びカラーを圧入して断熱空気層を形成してい
るので、断熱空気層についてのシール性が十分で
はなく、十分な断熱効果を期待できないという問
題がある。 However, in the structure as described above, since the mouthpiece and collar are press-fitted to form a heat insulating air layer, there is a problem in that the sealing performance of the heat insulating air layer is not sufficient and a sufficient heat insulation effect cannot be expected.
（発明の目的）
以上の点に鑑み、本発明は、副室の周囲に形成
される断熱空気層についてのシール性を向上さ
せ、断熱空気層による断熱効果を高めたエンジン
の副室構造を提供することを目的とするものであ
る。(Object of the Invention) In view of the above points, the present invention provides an engine pre-chamber structure that improves the sealing performance of the heat-insulating air layer formed around the pre-chamber and enhances the heat insulation effect of the heat-insulating air layer. The purpose is to
（発明の構成）
本発明は、上述した目的を達成するために、シ
リンダヘツドの凹部に嵌挿された副室構成部材を
円筒状外周面を有し内部に副室を形成する金属製
のチヤンバー部材と、円筒状部を有し前記チヤン
バー部材の外側に位置する金属製のスリーブとに
より構成し、前記スリーブの一端をチヤンバー部
材に固着する一方、他端を、チヤンバー部材に対
し軸方向に摺動可能でかつチヤンバー部材との間
にシール手段を有するようにし、前記チヤンバー
部材の円筒状外周面とスリーブの円筒状部が、断
熱空気層となる所定の間隙を存して位置している
ことを特徴とするものである。(Structure of the Invention) In order to achieve the above-mentioned object, the present invention is directed to a metal chamber having a cylindrical outer circumferential surface and forming a sub-chamber therein. and a metal sleeve having a cylindrical portion and located outside the chamber member, one end of the sleeve is fixed to the chamber member, while the other end is slidable in the axial direction with respect to the chamber member. The cylindrical outer circumferential surface of the chamber member and the cylindrical portion of the sleeve are positioned with a predetermined gap forming an insulating air layer. It is characterized by:
（実施例）
以下、本発明の実施例を図面に沿つて説明す
る。(Example) Examples of the present invention will be described below with reference to the drawings.
第１図に示すデイーゼルエンジンにおいて、シ
リンダヘツド１の凹部１ａに副室構成部材２が嵌
挿され、主燃焼室３に噴孔４を通じて連通する副
室５が構成されている。前記副室構成部材２は、
金属製のチヤンバー部材６の外側に、金属製のス
リーブ７が配設されてなる。 In the diesel engine shown in FIG. 1, a sub-chamber forming member 2 is fitted into a recess 1a of a cylinder head 1, forming a sub-chamber 5 communicating with a main combustion chamber 3 through a nozzle hole 4. The subchamber constituent member 2 is
A metal sleeve 7 is disposed outside the metal chamber member 6.
上記チヤンバー部材６は内部に副室５が形成さ
れた中空形状で、耐熱性金属（例えばインコネ
ル）からなり、半球面状の上面６ａを有し副室５
に開口するグロープラグ８の取付孔９及び燃料噴
射ノズル１０の噴射孔１１が開設された上部６ｂ
と、円筒状外周面６ｃを有する中間部６ｄと、該
中間部６ｄよりも大径である下部フランジ部６ｅ
とを備えている。 The chamber member 6 has a hollow shape with a subchamber 5 formed therein, is made of a heat-resistant metal (for example, Inconel), has a hemispherical upper surface 6a, and has a subchamber 5.
The upper part 6b has the mounting hole 9 of the glow plug 8 and the injection hole 11 of the fuel injection nozzle 10 opened to the upper part 6b.
, an intermediate portion 6d having a cylindrical outer peripheral surface 6c, and a lower flange portion 6e having a larger diameter than the intermediate portion 6d.
It is equipped with
上記スリーブ７は筒形状で、ステンレス鋼から
なり、内端縁がチヤンバー部材６の中間部６ｄ上
端の段部６ｆに電子ビーム溶接された上側フラン
ジ部７ａと、該上側フランジ部７ａの外端縁より
鉛直下方に延びる円筒状部７ｂとからなる。この
円筒状部７ｂの下端は、チヤンバー部材６の下部
フランジ部６ｅ付近まで延び、中間部６ｄ下端の
段部６ｇに配設された弾性シール材１２とそれの
半径方向において当接し、その当接状態でチヤン
バー部材６に対し軸方向に摺動可能となつてい
る。また、円筒状部７ｂの内周面は、チヤンバー
部材６の中間部６ｄの円筒状外周面６ｃと所定の
間隙を存して位置し、該両面間に断熱空気層Ｓを
形成している。 The sleeve 7 has a cylindrical shape and is made of stainless steel, and includes an upper flange part 7a whose inner edge is electron beam welded to a stepped part 6f at the upper end of the intermediate part 6d of the chamber member 6, and an outer edge of the upper flange part 7a. and a cylindrical portion 7b extending vertically downward. The lower end of this cylindrical portion 7b extends to the vicinity of the lower flange portion 6e of the chamber member 6, and contacts in the radial direction with the elastic sealing material 12 disposed on the step portion 6g at the lower end of the intermediate portion 6d. In this state, it is slidable in the axial direction with respect to the chamber member 6. Further, the inner circumferential surface of the cylindrical portion 7b is located with a predetermined gap from the cylindrical outer circumferential surface 6c of the intermediate portion 6d of the chamber member 6, and a heat insulating air layer S is formed between the two surfaces.
これにより、チヤンバー部材６とスリーブ７と
の間に形成される断熱空気層Ｓは上側は溶接によ
り、下側はシール材１２によりほぼ完全にシール
されることになる。 As a result, the heat insulating air layer S formed between the chamber member 6 and the sleeve 7 is almost completely sealed on the upper side by welding and on the lower side by the sealing material 12.
なお、１３はシリンダブロツク、１４はガスケ
ツト、１５は位置決め用のボールである。 Note that 13 is a cylinder block, 14 is a gasket, and 15 is a positioning ball.
上記のように構成すれば、チヤンバー部材６と
スリーブ７との間に断熱空気層Ｓがシール性よく
形成されるので、断熱効果が高められ、チヤンバ
ー部材６よりシリンダヘツド１へ熱が逃げるのを
防止でき、暖機性、燃焼性を高めることができ
る。また、スリーブ７の下端が、シール材１２と
の当接状態でチヤンバー部材６に対し軸方向に摺
動可能となつているので、シール性を損うことな
く、熱変形などを吸収でき、亀裂の発生も防止で
きる。 With the above configuration, a heat insulating air layer S is formed between the chamber member 6 and the sleeve 7 with good sealing properties, so that the heat insulation effect is enhanced and heat escape from the chamber member 6 to the cylinder head 1 is prevented. can be prevented and warm-up and combustibility can be improved. Furthermore, since the lower end of the sleeve 7 can slide in the axial direction relative to the chamber member 6 while in contact with the sealing material 12, it is possible to absorb thermal deformation without impairing sealing performance, and cracks can be absorbed. It is also possible to prevent the occurrence of
上記実施例では、スリーブ７の下端がシール材
１２に接するようになつているが、第２図に示す
ように、スリーブ７の下端７Ｃがチヤンバー部材
６に対し軸方向に摺動可能に当接し、その当接部
分の上側において弾性シール材１２にてシールを
施すようにすることもできる。 In the above embodiment, the lower end of the sleeve 7 is in contact with the sealing material 12, but as shown in FIG. It is also possible to provide a seal with an elastic sealing material 12 above the abutting portion.
（発明の効果）
本発明は上記のように構成したから、断熱空気
層についてのシールを確実に行うことができると
ともに、シール性を損うことなく熱変形を吸収で
き、断熱空気層による断熱効果を高めることがで
きる。しかも、構造が簡単なので、断熱空気層の
形成が容易である。(Effects of the Invention) Since the present invention is constructed as described above, it is possible to reliably seal the insulating air layer, and also absorb thermal deformation without impairing sealing performance, and the heat insulating effect of the insulating air layer can be increased. Moreover, since the structure is simple, it is easy to form a heat insulating air layer.
図面は本発明の実施例を示し、第１図はエンジ
ンの副室構造を示す断面図、第２図は変形例の要
部断面図である。
１……シリンダヘツド、１ａ……凹部、２……
副室構成部材、３……主燃焼室、４……噴孔、５
……副室、６……チヤンバー部材、６ｃ……円筒
状外周面、７……スリーブ、７ｂ……円筒状部、
１２……シール材、Ｓ……断熱空気層。
The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view showing the subchamber structure of an engine, and FIG. 2 is a sectional view of a main part of a modified example. 1...Cylinder head, 1a...Recess, 2...
Sub-chamber component, 3... Main combustion chamber, 4... Nozzle hole, 5
...Subchamber, 6...Chamber member, 6c...Cylindrical outer peripheral surface, 7...Sleeve, 7b...Cylindrical part,
12...Sealing material, S...Insulating air layer.
Claims (1)
され、主燃焼室に噴孔を通じて連通する副室が構
成されたエンジンにおいて、前記副室構成部材
が、円筒状外周面を有し内部に副室を形成する金
属製のチヤンバー部材と、円筒状部を有し前記チ
ヤンバー部材の外側に位置する金属製のスリーブ
とを備え、前記スリーブの一端がチヤンバー部材
に固着される一方、他端がチヤンバー部材に対し
軸方向に摺動可能でかつチヤンバー部材との間に
シール手段が施され、前記チヤンバー部材の円筒
状外周面とスリーブの円筒状部が所定の間隙を存
して位置していることを特徴とするエンジンの副
室構造。1. In an engine in which a sub-chamber forming member is fitted into a recessed portion of a cylinder head to form a sub-chamber that communicates with a main combustion chamber through a nozzle hole, the sub-chamber forming member has a cylindrical outer peripheral surface and has a sub-chamber inside. A metal chamber member forming a chamber, and a metal sleeve having a cylindrical portion and located outside the chamber member, one end of the sleeve is fixed to the chamber member, and the other end is attached to the chamber member. The member is slidable in the axial direction and is provided with a sealing means between the member and the chamber member, and the cylindrical outer circumferential surface of the chamber member and the cylindrical portion of the sleeve are positioned with a predetermined gap. An engine pre-chamber structure featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59193383A JPS6172826A (en) | 1984-09-14 | 1984-09-14 | Sub-chamber structure in engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59193383A JPS6172826A (en) | 1984-09-14 | 1984-09-14 | Sub-chamber structure in engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6172826A JPS6172826A (en) | 1986-04-14 |
| JPH0159408B2 true JPH0159408B2 (en) | 1989-12-18 |
Family
ID=16307013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59193383A Granted JPS6172826A (en) | 1984-09-14 | 1984-09-14 | Sub-chamber structure in engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6172826A (en) |
-
1984
- 1984-09-14 JP JP59193383A patent/JPS6172826A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6172826A (en) | 1986-04-14 |
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