JPH0515577Y2 - - Google Patents
Info
- Publication number
- JPH0515577Y2 JPH0515577Y2 JP1983007919U JP791983U JPH0515577Y2 JP H0515577 Y2 JPH0515577 Y2 JP H0515577Y2 JP 1983007919 U JP1983007919 U JP 1983007919U JP 791983 U JP791983 U JP 791983U JP H0515577 Y2 JPH0515577 Y2 JP H0515577Y2
- Authority
- JP
- Japan
- Prior art keywords
- heat shield
- heat
- tip
- fuel injection
- injection valve
- 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
- 239000000446 fuel Substances 0.000 claims description 53
- 238000002347 injection Methods 0.000 claims description 34
- 239000007924 injection Substances 0.000 claims description 34
- 239000007769 metal material Substances 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 3
- NMFHJNAPXOMSRX-PUPDPRJKSA-N [(1r)-3-(3,4-dimethoxyphenyl)-1-[3-(2-morpholin-4-ylethoxy)phenyl]propyl] (2s)-1-[(2s)-2-(3,4,5-trimethoxyphenyl)butanoyl]piperidine-2-carboxylate Chemical compound C([C@@H](OC(=O)[C@@H]1CCCCN1C(=O)[C@@H](CC)C=1C=C(OC)C(OC)=C(OC)C=1)C=1C=C(OCCN2CCOCC2)C=CC=1)CC1=CC=C(OC)C(OC)=C1 NMFHJNAPXOMSRX-PUPDPRJKSA-N 0.000 description 14
- 239000000567 combustion gas Substances 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000010949 copper Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は、副室式デイーゼル機関におけるヒ
ートシールドに係わり、更に詳しくは燃料噴射弁
の熱をシリンダヘツドへ効率良く伝達出来るよう
にしたヒートシールドの改良に関するものであ
る。[Detailed description of the invention] [Industrial application field] This invention relates to a heat shield in a pre-chamber type diesel engine, and more specifically, a heat shield that allows heat from a fuel injection valve to be efficiently transferred to a cylinder head. This is related to the improvement of
一般にヒートシールドの機能としては、燃焼室
内の高温の燃焼ガスから燃料噴射弁の表面を保護
し、かつ燃焼ガスからの受熱を極力少なくして燃
料噴射弁の針弁のステツクを防止すると共に、カ
ーボンの堆積を少なくして燃料の噴霧状態を常に
最適に保つことである。
In general, the function of a heat shield is to protect the surface of the fuel injector from the high-temperature combustion gas in the combustion chamber, to minimize heat received from the combustion gas, and to prevent the needle valve of the fuel injector from becoming stuck. The goal is to keep the fuel atomization condition optimal at all times by reducing the accumulation of fuel.
ところで、従来のヒートシールド１は、第１図
に示すようにシリンダヘツド２に、フランジ部３
の表裏面にリンク状のパツキン４を介して取り付
けられ、燃料噴射弁５の先端部を支持するように
構成されていた。 By the way, the conventional heat shield 1 has a flange portion 3 on the cylinder head 2, as shown in FIG.
It was attached to the front and back surfaces of the fuel injection valve 5 via a link-shaped gasket 4, and was configured to support the tip of the fuel injection valve 5.
然しながら、このような従来のヒートシールド
１にあつては、渦流室６内の燃焼ガスから燃料噴
射弁５の表面を適正に保護しているものの、ヒー
トシールド１と燃料噴射弁５の先端との隙間ｈが
小さい為に、高速・高負荷機関では、ヒートシー
ルド１で受けた熱が燃料噴射弁５に伝わり易く、
その結果燃料噴射弁５の針弁７にカーボンが堆積
し、しかも燃料の噴霧割れが発生して排気ガスの
劣化、騒音の悪化を引き起こすと言う問題があつ
た。 However, although such a conventional heat shield 1 properly protects the surface of the fuel injector 5 from the combustion gas in the swirl chamber 6, the contact between the heat shield 1 and the tip of the fuel injector 5 is Because the gap h is small, in high-speed, high-load engines, the heat received by the heat shield 1 is easily transmitted to the fuel injection valve 5.
As a result, carbon is deposited on the needle valve 7 of the fuel injection valve 5, and fuel spray cracks occur, causing deterioration of exhaust gas and noise.
なお８はシリンダ、９はピストン、１０は燃焼
室である。 Note that 8 is a cylinder, 9 is a piston, and 10 is a combustion chamber.
ヒートシールドに関する公知技術として実開昭
56−157366号公報や実開昭57−58769号公報が提
案されている。 Jitsukasho as a publicly known technology regarding heat shields
No. 56-157366 and Japanese Utility Model Application Publication No. 57-58769 have been proposed.
前者はヒートシールドをセラミツク材料に構成
して断熱性の向上を図るものであるが、これはヒ
ートシールドが全体的にセラミツク材料で構成さ
れているために、燃料噴射弁の先端部を断熱する
ことが可能であるが、その先端部が受けた熱を積
極的にシリンダヘツド側に逃がす構造が採用され
ていないので、針弁の先端部にカーボンが堆積し
て次第に噴孔に詰まりを発生するという問題があ
る。 In the former method, the heat shield is made of ceramic material in order to improve its insulation properties, but since the heat shield is made entirely of ceramic material, it is difficult to insulate the tip of the fuel injector. However, since a structure that actively releases the heat received at the tip of the needle valve to the cylinder head side is not adopted, carbon accumulates at the tip of the needle valve and gradually clogs the nozzle hole. There's a problem.
また、後者は燃料噴射弁の先端部の前端部と側
部を覆い、取付用のフランジ部を一体的に形成し
た金属製のヒートインシユレータの前記前端部を
覆う部分と、渦流室の一部を形成する棚部との間
にセラミツク材からなるリング状プレートを介在
させたものである。しかし、この公知技術も燃料
噴射弁の先端部をコルゲートワツシヤを介してヒ
ートインシユレータの前部で覆つた構造のもの
で、燃料噴射弁が受けた熱を積極的にシリンダヘ
ツド側に逃がす構造は採用されていない。 The latter covers the front end and sides of the tip of the fuel injector, and also covers the front end of the metal heat insulator, which has an integrally formed flange for mounting, and the part of the swirl chamber. A ring-shaped plate made of ceramic material is interposed between the shelf and the shelf forming the section. However, this known technology also has a structure in which the tip of the fuel injection valve is covered with the front part of the heat insulator via a corrugated washer, and the heat received by the fuel injection valve is actively released to the cylinder head side. structure has not been adopted.
燃料噴射弁には燃料噴射孔が設けられている先
端部より若干後方に段部が設けられているが、こ
の段部の近傍に弁座が設けられている関係でこの
部分を冷却することが重要である。しかし、従来
の燃料噴射弁においては、先端部を断熱して噴孔
部分への炭化を防止するという技術的思想はある
が、前記弁座部分を積極的に冷却し、それによつ
て効率的に炭化を防止するという思想は開示され
ていない。 The fuel injection valve has a stepped portion slightly behind the tip where the fuel injection hole is provided, and since the valve seat is provided near this stepped portion, this portion can be cooled. is important. However, in conventional fuel injection valves, although there is a technical concept of insulating the tip part to prevent carbonization in the nozzle hole part, it is not possible to actively cool the valve seat part, thereby effectively cooling the valve seat part. The idea of preventing carbonization is not disclosed.
この考案は、係る従来の問題点に着目して案出
されたもので、その目的とするところは燃焼ガス
の温度が燃料噴射弁に伝達されるのを極力少なく
する一方、加熱された燃料噴射弁の熱を効率良く
シリンダヘツド側に逃がすことにより、針弁のカ
ーボン堆積による詰まりを有効に防止した副室式
デイーゼル機関におけるヒートシールドを提供す
るものである。 This idea was devised by focusing on the conventional problems, and its purpose is to minimize the temperature of combustion gas being transmitted to the fuel injection valve, while also preventing heated fuel injection. The present invention provides a heat shield for a pre-chamber type diesel engine that effectively prevents clogging of needle valves due to carbon accumulation by efficiently dissipating valve heat to the cylinder head side.
この考案に係る副室式デイーゼル機関のヒート
シールドは、上記目的を達成するため、燃料噴射
弁の先端部外周に断熱空気層を形成してシリンダ
ヘツドに設けた渦流室に通ずる取付穴に嵌合され
るヒートシールドであつて、該ヒートシールドは
前記渦流室側に位置する熱伝達の悪い金属材料で
形成された前部と、該前部に接続された熱伝達の
良い金属材料で形成された後部からなり、前部は
燃料噴射弁の前端部の一部を覆つて取付穴の一部
まで延長されて嵌合される円筒状の部分を有し、
前記後部は前記取付穴に嵌合する円筒状の部分
と、燃料噴射弁の段部端面と先端部の後端外周面
に当接する縮径された円板状の部分より構成して
成るものである。
In order to achieve the above object, the heat shield for the pre-chamber type diesel engine according to this invention forms an insulating air layer around the tip of the fuel injector and fits into the mounting hole communicating with the swirl chamber provided in the cylinder head. The heat shield has a front portion formed of a metal material with poor heat transfer located on the swirl chamber side, and a metal material with good heat transfer connected to the front portion. The front part has a cylindrical part that covers a part of the front end of the fuel injector and extends to a part of the mounting hole and is fitted therein.
The rear part is composed of a cylindrical part that fits into the mounting hole, and a reduced diameter disc-shaped part that comes into contact with the step end face and rear end outer peripheral surface of the tip part of the fuel injector. be.
この考案に係るヒートシールドは、副室の高温
のガスに晒される部分を熱伝達の悪い金属材料か
らなる前部で、そして燃料噴射弁の段部と接触す
る部分を熱伝達の良い金属からなる後部から構成
した、複合構造に構成し、しかも燃料噴射弁の先
端部外周とは断熱空気層を形成して嵌合されてい
る。
In the heat shield according to this invention, the front part is made of a metal material with poor heat transfer, and the part exposed to the high temperature gas in the subchamber is made of a metal material with good heat transfer, and the part that contacts the stepped part of the fuel injector is made of a metal with good heat transfer. It has a composite structure starting from the rear, and is fitted to the outer periphery of the tip of the fuel injection valve to form a heat insulating air layer.
従つて、前部で副室中の高温の燃焼ガスの熱が
燃料噴射弁に伝達されるのを防止し、後部で燃料
噴射弁に伝達された熱を低温のシリンダヘツド側
に速やかに伝達することができるものである。し
かも断熱空気層により燃料噴射弁の先端部に急激
な温度変化を与えないようにしている。 Therefore, the front part prevents the heat of the high-temperature combustion gas in the pre-chamber from being transferred to the fuel injection valve, and the rear part quickly transfers the heat transferred to the fuel injection valve to the low-temperature cylinder head side. It is something that can be done. Furthermore, the adiabatic air layer prevents sudden temperature changes from occurring at the tip of the fuel injection valve.
以下添付図面に基いて、この考案の実施例を説
明する。
Embodiments of this invention will be described below based on the accompanying drawings.
なお第１図において説明した従来例と同一部品
は同一符号を付して説明は省略する。 Note that parts that are the same as those of the conventional example explained in FIG.
第２図は、デイーゼル機関の副室式燃焼室の断
面図を示し、８はシリンダ、９はピストン、２は
渦流室６を設けたシリンダヘツド、１０は燃焼室
であつて、前記渦流室６には、グロープラグ１１
と、ヒートシールド１を介して主噴孔１２を備え
た燃料噴射弁５とが装着されている。 FIG. 2 shows a cross-sectional view of a pre-combustion chamber of a diesel engine, in which 8 is a cylinder, 9 is a piston, 2 is a cylinder head provided with a swirl chamber 6, and 10 is a combustion chamber. Glow plug 11
and a fuel injection valve 5 having a main nozzle hole 12 are attached via a heat shield 1.
前記ヒートシールド１の後部１ｂは、シリンダ
ヘツド２に形成された渦流室６に一端が開口され
た取付穴に嵌合する円筒状の部分１ｃと、この円
筒状の部分１ｃの端部に接続され、前記取付穴と
燃料噴射弁５の段部５ｂ端面との間に装着され、
その縮径された部分を燃料噴射弁５の先端部５ａ
の後端外周面に当接するように構成した円板状の
部分１ｄより構成されている。 The rear portion 1b of the heat shield 1 is connected to a cylindrical portion 1c that fits into a mounting hole with one end opened in the swirl chamber 6 formed in the cylinder head 2, and an end of this cylindrical portion 1c. , installed between the mounting hole and the end surface of the stepped portion 5b of the fuel injection valve 5,
The reduced diameter portion is connected to the tip 5a of the fuel injection valve 5.
It is composed of a disk-shaped portion 1d configured to abut against the outer circumferential surface of the rear end.
また、前記ヒートシールド１の前部１ａは、前
記取付穴の内径部に当接する円筒状の部分１ｅ
と、燃料噴射弁５の先端部５ａの前端部を覆う皿
状の部分１ｆより構成されており、この皿状の部
分１ｆの背後と前記先端部５ａの前端部との間に
コルゲートワツシヤを介在させて間隔ｈを形成し
ている。 Further, the front part 1a of the heat shield 1 has a cylindrical part 1e that comes into contact with the inner diameter part of the mounting hole.
and a dish-shaped part 1f that covers the front end of the tip 5a of the fuel injection valve 5, and a corrugated washer is installed between the back of the dish-shaped part 1f and the front end of the tip 5a. They are interposed to form a spacing h.
そしてこのヒートシールド１と先端部５ａとの
間には断熱空気層１３を形成して燃焼ガスが直接
に先端部５ａに接触せず、更にシリンダヘツド２
によつて噴孔部分が冷却されないように構成して
いる。 A heat insulating air layer 13 is formed between the heat shield 1 and the tip 5a so that the combustion gas does not come into direct contact with the tip 5a.
The structure is such that the nozzle hole portion is not cooled by this.
前記ヒートシールド１は、第３図に示すように
燃料噴射弁５の先端部５ａ前方に位置する前部１
ａを熱伝達率の悪い金属材料、例えばステンレス
等の耐熱性及び断熱性に富んだ材料により形成さ
れ、また前記先端部５ａのシリンダヘツド２側に
当接する後端縁１ｃを有する後部１ｂは熱伝達率
の良い金属材料、例えば銅（Cu）等により形成
されている。 The heat shield 1 has a front portion 1 located in front of the tip 5a of the fuel injection valve 5 as shown in FIG.
The rear part 1b is made of a metal material with a poor heat transfer coefficient, such as a material with high heat resistance and heat insulation properties such as stainless steel, and the rear part 1b has a rear end edge 1c that contacts the cylinder head 2 side of the tip part 5a. It is made of a metal material with good transmittance, such as copper (Cu).
この考案のヒートシールドは上記のように構成
され、燃焼室１０内の燃焼ガス熱は、ヒートシー
ルド１を介して燃料噴射弁５側に伝達しようとす
るが、ヒートシールド１の前部１ａはステンレス
の如き熱伝達率の悪い金属材料により形成されて
いる為、該燃焼ガス熱は燃料噴射弁５側に伝達さ
れる率が少なく、また燃料噴射弁５とヒートシー
ルド１との間に断熱空気層１３が形成されている
為、熱の伝達は大幅に低減され、特に高速・高負
荷用機関で問題となる燃料噴射弁５の先端部５ａ
に内蔵されたノズル針弁（図示せず）のカーボン
附着による排気ガス劣化、及び騒音の悪化を解消
することが出来るものである。 The heat shield of this invention is constructed as described above, and the heat of the combustion gas in the combustion chamber 10 attempts to be transmitted to the fuel injection valve 5 side via the heat shield 1, but the front part 1a of the heat shield 1 is made of stainless steel. Since it is made of a metal material with a poor heat transfer coefficient, the rate at which the heat of the combustion gas is transferred to the fuel injection valve 5 side is small, and there is a heat insulating air layer between the fuel injection valve 5 and the heat shield 1. 13, heat transfer is significantly reduced, and the tip 5a of the fuel injector 5 is a problem, especially in high-speed, high-load engines.
This can eliminate exhaust gas deterioration and noise aggravation due to carbon adhesion to the nozzle needle valve (not shown) built into the engine.
また燃料噴射弁５が加熱されたとしても、ヒー
トシールド１の後部１ｂは銅等のような熱伝達率
の良い材料で形成されている為、その熱をシリン
ダヘツド２側に効率良く逃がすことができるもの
である。 Furthermore, even if the fuel injection valve 5 is heated, the rear part 1b of the heat shield 1 is made of a material with good heat transfer coefficient, such as copper, so the heat cannot be efficiently released to the cylinder head 2 side. It is possible.
以上のように、この考案に係る副室式デイーゼ
ル機関のヒートシールドは、燃料噴射弁の先端部
外周に断熱空気層を形成してシリンダヘツドに設
けた渦流室に通ずる取付穴に嵌合されるヒートシ
ールドであつて、該ヒートシールドは前記渦流室
側に位置する熱伝達の悪い金属材料で形成された
前部と、該前部に接続された熱伝達の良い金属材
料で形成された後部からなり、前部は燃料噴射弁
の前端部の一部を覆う部分と取付穴の一部まで延
長されて嵌合される円筒状の部分を有し、前記後
部は前記取付穴に嵌合する円筒状の部分と、燃料
噴射弁の段部端面と先端部の後端外周面に当接す
る縮径され、更に先端部の外周に嵌合される円板
状の部分より構成して成るものである。
As described above, the heat shield of the pre-chamber type diesel engine according to this invention forms an insulating air layer around the tip of the fuel injection valve and is fitted into the mounting hole communicating with the swirl chamber provided in the cylinder head. The heat shield includes a front part formed of a metal material with poor heat transfer located on the swirl chamber side, and a rear part formed of a metal material with good heat transfer connected to the front part. The front part has a part that covers a part of the front end of the fuel injector and a cylindrical part that extends to and fits into a part of the mounting hole, and the rear part has a cylindrical part that fits into the mounting hole. It consists of a shaped part and a disc-shaped part which has a reduced diameter and comes into contact with the step end face of the fuel injector and the outer peripheral surface of the rear end of the tip part, and which is further fitted onto the outer periphery of the tip part. .
従つて、ヒートシールドの前部はステンレスの
如き熱伝達率の悪い金属材料により形成されてい
る為、燃焼ガス熱は燃料噴射弁側に伝達される率
が少なく、また燃料噴射弁とヒートシールドとの
間に断熱空気層が形成されている為、熱の伝達は
大幅に低減され、特に高速・高負荷用機関で問題
となる燃料噴射弁の先端部に内蔵されたノズル針
弁（図示せず）のカーボン附着による排気ガス劣
化、及び騒音の悪化を解消することが出来るもの
である。 Therefore, since the front part of the heat shield is made of a metal material with poor heat transfer coefficient, such as stainless steel, the combustion gas heat is transferred to the fuel injection valve side at a low rate, and the heat shield is Because an insulating air layer is formed between them, heat transfer is significantly reduced, which is a problem especially in high-speed, high-load engines. ) can eliminate exhaust gas deterioration and noise aggravation caused by carbon adhesion.
また燃料噴射弁５が加熱されたとしても、ヒー
トシールド１の後部１ｂは銅等のような熱伝達率
の良い材料で形成されている為、その熱をシリン
ダヘツド２側に効率良く逃がすことができるもの
である。 Furthermore, even if the fuel injection valve 5 is heated, the rear part 1b of the heat shield 1 is made of a material with good heat transfer coefficient, such as copper, so the heat cannot be efficiently released to the cylinder head 2 side. It is possible.
さらに、上述の如きヒートシールドの前部の遮
熱効果と後部の電熱効果とが相俟つて、燃焼ガス
の熱が燃料噴射弁に伝達されるのを極力防止する
一方、加熱された燃料噴射弁の先端部の熱を効率
良くシリンダヘツド側に逃がすことができ、針弁
の先端にカーボンが堆積することによる噴孔の詰
まりを有効に防止すると同時に、燃料噴霧の割れ
の発生を防止して適正な形状の噴霧を形成する。
その結果、排気ガスの劣化と騒音の悪化を防止す
ると共に、燃料噴射弁の耐久性を著しく向上させ
ることができる効果がある。 Furthermore, the heat shielding effect of the front part of the heat shield and the electric heating effect of the rear part as described above combine to prevent the heat of the combustion gas from being transferred to the fuel injection valve, while also preventing the heated fuel injection valve from being transferred to the fuel injection valve. The heat at the tip of the needle valve can be efficiently dissipated to the cylinder head side, effectively preventing clogging of the nozzle hole due to carbon buildup at the tip of the needle valve, and at the same time preventing the occurrence of cracks in the fuel spray. Forms a spray with a unique shape.
As a result, deterioration of exhaust gas and deterioration of noise can be prevented, and the durability of the fuel injection valve can be significantly improved.
第１図は従来の副室式燃焼室の断面図、第２図
はこの考案を実施した副室式燃焼室の断面図、第
３図はヒートシールドの断面図である。
１……ヒートシールド、１ａ……ヒートシール
ドの前部、１ｂ……ヒートシールドの後部、２…
…シリンダヘツド、５……燃料噴射弁、１３は断
熱空気層。
FIG. 1 is a cross-sectional view of a conventional pre-chamber type combustion chamber, FIG. 2 is a cross-sectional view of a pre-chamber type combustion chamber in which this invention is implemented, and FIG. 3 is a cross-sectional view of a heat shield. 1... Heat shield, 1a... Front part of heat shield, 1b... Rear part of heat shield, 2...
...Cylinder head, 5...Fuel injection valve, 13 is a heat insulating air layer.
Claims (1)
てシリンダヘツドに設けた渦流室に通ずる取付穴
に嵌合されるヒートシールドであつて、該ヒート
シールドは前記渦流室側に位置する熱伝達の悪い
金属材料で形成された前部と、該前部に接続され
た熱伝達の良い金属材料で形成された後部からな
り、前部は燃料噴射弁の前端部の一部を覆つて取
付穴の一部まで延長されて嵌合される円筒状の部
分を有し、前記後部は前記取付穴に嵌合する円筒
状の部分と、燃料噴射弁の段部端面と先端部の後
端外周面に当接する縮径された円板状の部分より
構成して成る副室式デイーゼル機関のヒートシー
ルド。 A heat shield that forms an insulating air layer around the outer periphery of the tip of the fuel injection valve and is fitted into a mounting hole that communicates with a swirl chamber provided in the cylinder head, the heat shield forming a heat transfer layer located on the swirl chamber side. The front part is made of a metal material with good heat conductivity, and the rear part is connected to the front part and made of a metal material with good heat transfer.The front part covers a part of the front end of the fuel injector and has a mounting hole. The rear part has a cylindrical part that extends to a part of the mounting hole and is fitted therein, and the rear part has a cylindrical part that fits into the mounting hole, and a step end face and a rear end outer peripheral surface of the tip part of the fuel injector. A heat shield for a pre-chamber diesel engine consisting of a disc-shaped part with a reduced diameter that comes into contact with the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP791983U JPS59115861U (en) | 1983-01-25 | 1983-01-25 | Pre-chamber diesel engine nozzle heat shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP791983U JPS59115861U (en) | 1983-01-25 | 1983-01-25 | Pre-chamber diesel engine nozzle heat shield |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59115861U JPS59115861U (en) | 1984-08-04 |
| JPH0515577Y2 true JPH0515577Y2 (en) | 1993-04-23 |
Family
ID=30139431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP791983U Granted JPS59115861U (en) | 1983-01-25 | 1983-01-25 | Pre-chamber diesel engine nozzle heat shield |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59115861U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4118588B2 (en) * | 2002-04-09 | 2008-07-16 | 株式会社アルバック | Metal ribbon casting equipment |
| JP7348891B2 (en) * | 2020-12-28 | 2023-09-21 | 株式会社クボタ | electronic fuel injection diesel engine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56157366U (en) * | 1980-04-25 | 1981-11-24 | ||
| JPS5758769U (en) * | 1980-09-25 | 1982-04-07 |
-
1983
- 1983-01-25 JP JP791983U patent/JPS59115861U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59115861U (en) | 1984-08-04 |
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