JPS591103Y2 - Diesel engine cylinder head - Google Patents
Diesel engine cylinder headInfo
- Publication number
- JPS591103Y2 JPS591103Y2 JP1978145608U JP14560878U JPS591103Y2 JP S591103 Y2 JPS591103 Y2 JP S591103Y2 JP 1978145608 U JP1978145608 U JP 1978145608U JP 14560878 U JP14560878 U JP 14560878U JP S591103 Y2 JPS591103 Y2 JP S591103Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder head
- fuel injection
- injection valve
- tip
- shielding member
- 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
Landscapes
- Fuel-Injection Apparatus (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】
本考案はシリンダヘッドに嵌着せしめる燃料噴射弁先端
部周囲を遮熱するような部材を設けたディーゼル機関の
シリンダヘッドに関するものである。[Detailed Description of the Invention] The present invention relates to a cylinder head for a diesel engine that is provided with a member that insulates the area around the tip of a fuel injection valve that is fitted into the cylinder head.
従来、ディーゼル機関用燃料噴射弁は、機関の性能に重
要な影響をあたえるものであるが、ディーゼル機関は、
近年ますます高速、高出力化される傾向にあり、したが
って、燃料噴射弁のように高温の燃焼ガスにさらされる
部分は、次第に苛酷な条件での作動を要求されるように
なり、作動中の燃料噴射弁の温度もかなり高温になって
きている。Traditionally, fuel injection valves for diesel engines have had a significant impact on engine performance;
In recent years, there has been a trend toward higher speeds and higher outputs, and parts such as fuel injection valves that are exposed to high-temperature combustion gas are required to operate under increasingly harsh conditions. The temperature of the fuel injection valve has also become quite high.
従って、燃料噴射弁ノズルが正常に作動してその機能を
満足にはたすためには、燃料噴射弁の温度をある温度範
囲内に制御することが必要である。Therefore, in order for the fuel injection valve nozzle to operate normally and perform its functions satisfactorily, it is necessary to control the temperature of the fuel injection valve within a certain temperature range.
そこで、第１図の従来例に示すごとく、シリンダヘッド
１に袋ナツト６を介して燃料噴射弁２を嵌着せしめる際
、燃料噴射弁２の先端部周囲の少くとも一部を覆うよう
な突起部４ａを有する遮熱数４を嵌装せしめ、遮熱数４
と袋ナツト６の間にパツキン３を挟装して、燃料噴射弁
２を燃焼室７に面する側から遮熱する方式もあるが、そ
の遮熱数４が形状的に制約されるため、遮熱数４自体の
耐熱性を確保するのが困難であり、且つその製作コスト
が高いという欠点がある。Therefore, as shown in the conventional example shown in FIG. A heat shield number 4 having a portion 4a is fitted, and a heat shield number 4 is fitted.
There is also a method in which the gasket 3 is sandwiched between the fuel injector 2 and the cap nut 6 to insulate the fuel injector 2 from the side facing the combustion chamber 7, but the number of insulators 4 is limited due to the shape. There are disadvantages in that it is difficult to ensure the heat resistance of the heat shield number 4 itself, and the manufacturing cost is high.
一方、第２図で示す他の従来例のごとく、冷却形の燃料
噴射弁２を用いる場合は、冷却効果が良いので、大形高
過給ディーゼル機関に使用されているが、その構造が複
雑になり、製作コストが高いという欠点か゛ある。On the other hand, when a cooling type fuel injection valve 2 is used, as in the other conventional example shown in Fig. 2, it has a good cooling effect and is used in large, highly supercharged diesel engines, but its structure is complicated. The disadvantage is that the manufacturing cost is high.
そこで本考案は、前記従来の欠点を解消するため、耐熱
性の高い遮熱部材をシリンダヘッドの燃料噴射弁取付部
に嵌装せしめることにより、燃料噴射弁の温度上昇を防
止すると共に、燃料噴射弁の耐久性及び信頼性の向上を
はかることを目的としたものである。Therefore, in order to eliminate the above-mentioned conventional drawbacks, the present invention prevents the temperature of the fuel injection valve from rising by fitting a highly heat-resistant heat shielding member into the fuel injection valve mounting part of the cylinder head, and prevents the fuel injection valve from increasing. The purpose is to improve the durability and reliability of the valve.
即ち、本考案は燃料噴射弁の燃焼室に面する先端部の少
くとも一部を覆うような遮熱部材を有するシリンダヘッ
ドにおいて、該遮熱部材を、燃料噴射弁の先端部外周を
囲繞し、かつ噴口部分が突出する、燃料噴射弁先端部の
形状に対応した内孔を有する円環状に形威し、該遮熱部
材をシリンダヘッドの材料より耐熱性の高い材料にて形
成すると共に、該遮熱部材をシリンダヘッドの燃料噴射
弁取付部の燃焼室に面する側に嵌装せしめることにより
構成される。That is, the present invention provides a cylinder head having a heat shielding member that covers at least a part of the tip end of the fuel injector facing the combustion chamber, in which the heat shielding member surrounds the outer periphery of the tip end of the fuel injector. , and has an annular shape having an inner hole corresponding to the shape of the tip of the fuel injection valve from which the nozzle port protrudes, and the heat shield member is formed of a material having higher heat resistance than the material of the cylinder head, It is constructed by fitting the heat shielding member to the side facing the combustion chamber of the fuel injection valve mounting portion of the cylinder head.
以下、第３図を参照して本考案の実施例を説明するが、
第１図及び第２図の従来例と同じ部品は同じ部品番号で
示している。Hereinafter, an embodiment of the present invention will be explained with reference to FIG.
The same parts as in the conventional example of FIGS. 1 and 2 are indicated by the same part numbers.
第３図の本考案の実施例におけるシリンダヘッド１では
、燃料噴射弁２の取付部に、燃料噴射弁２の燃焼室７に
面する先端部の少くとも一部を覆うような突起部５ａを
有し、かつ燃料噴射弁先端部の形状に対応した内孔を有
する円環状の遮熱部材５を、シリンダヘッド１の燃料噴
射弁２の取付部の燃焼室７に面する側に圧入又はねじ等
により嵌装せしめている。In the cylinder head 1 according to the embodiment of the present invention shown in FIG. 3, a protrusion 5a is provided at the mounting part of the fuel injector 2 so as to cover at least a part of the tip end facing the combustion chamber 7 of the fuel injector 2. An annular heat shielding member 5 having an inner hole corresponding to the shape of the tip of the fuel injection valve is press-fitted or screwed into the mounting part of the fuel injection valve 2 of the cylinder head 1 on the side facing the combustion chamber 7. etc., to make it fit.
なお、この場合、上記遮熱部材５をシリンダヘッド１の
所定の位置に鋳込むことにより嵌装せしめてもよい。In this case, the heat shielding member 5 may be fitted into the cylinder head 1 by being cast at a predetermined position.
更に、上記遮熱部材５としては、シリンダヘッド１より
も耐熱性の高い材料にて形成せしめるものであり、これ
により燃料噴射弁２の先端部の温度上昇を防止すること
ができる。Furthermore, the heat shielding member 5 is made of a material with higher heat resistance than the cylinder head 1, thereby preventing the temperature at the tip of the fuel injection valve 2 from rising.
このように本考案のシリンダヘッドでは、遮熱部材を燃
料噴射弁先端部の形状に対応した内孔を有する円環状に
形成したので、シリンダヘッドの燃料噴射弁取付部の燃
焼室に面する側に容易にかつ精度よく嵌装させることが
できる。In this way, in the cylinder head of the present invention, the heat shield member is formed in an annular shape with an inner hole corresponding to the shape of the tip of the fuel injector, so that the side facing the combustion chamber of the fuel injector mounting part of the cylinder head is It can be fitted easily and accurately.
また該遮熱部材をシリンダヘッドよりも耐熱性の高い材
料で形成して、燃料噴射弁の先端部を覆うようにしたの
で、これにより燃料噴射弁の先端部の温度上昇を防止す
ることができる。Furthermore, since the heat shielding member is made of a material with higher heat resistance than the cylinder head and covers the tip of the fuel injection valve, it is possible to prevent the temperature of the tip of the fuel injection valve from rising. .
従って、本考案のシリンダヘッドでは；燃料噴射弁の先
端部の冷却を良くすることができ、そのテ゛イーゼル機
関の良好な燃焼性能を維持せしめると共に、燃料噴射弁
の耐久性及び信頼性の向上を図る上で有効である。Therefore, the cylinder head of the present invention can improve the cooling of the tip of the fuel injection valve, maintain good combustion performance of the easel engine, and improve the durability and reliability of the fuel injection valve. is valid above.
また、これにより従来冷却形燃料噴射弁を用いていた大
形高過給ディーゼル機関に無冷却形燃料噴射弁の使用を
可能にせしめるので、製作コストの低減をはかる上で効
果がある。Furthermore, this makes it possible to use non-cooled fuel injection valves in large, highly supercharged diesel engines that conventionally used cooled fuel injection valves, which is effective in reducing manufacturing costs.
なお、本考案は直接噴射式高過給ディーゼル機関のシリ
ンダヘッドに対して有効である。The present invention is effective for cylinder heads of direct injection highly supercharged diesel engines.
第１図及び第２図はそれぞれ、従来例及び他の従来例に
おけるシリンダヘッドの燃料噴射弁取付孔周辺要部の縦
断面図、第３図は本考案の実施例におけるシリンダヘッ
ドの燃料噴射弁取付孔周辺要部の縦断面図である。
１・・・シリンダヘッド、２・・・燃料噴射弁、５・・
・遮熱部材、５ａ・・・突起部、７・・・燃焼室。1 and 2 are longitudinal cross-sectional views of the main parts around the fuel injection valve mounting hole of the cylinder head in a conventional example and another conventional example, respectively, and FIG. 3 is a longitudinal sectional view of the fuel injection valve in the cylinder head in an embodiment of the present invention. FIG. 3 is a vertical cross-sectional view of the main part around the attachment hole. 1... Cylinder head, 2... Fuel injection valve, 5...
- Heat shielding member, 5a... protrusion, 7... combustion chamber.
Claims (1)
うような遮熱部材を有するシリンダヘッドにおいて、該
遮熱部材を、燃料噴射弁の先端部外周を囲繞し、かつ噴
口部分が突出する、燃料噴射弁先端部の形状に対応した
内孔を有する円環状に形成し、該遮熱部材をシリンダヘ
ッドの材料より耐熱性の高い材料にて形成すると共に、
該遮熱部材をシリンダヘッドの燃料噴射弁取付部の燃焼
室に面する側に嵌装せしめてなるディーゼル機関のシリ
ンダヘッド。In a cylinder head having a heat shielding member that covers at least a part of the tip of the fuel injector facing the combustion chamber, the heat shielding member surrounds the outer periphery of the tip of the fuel injector, and the nozzle part is It is formed into an annular shape having an inner hole corresponding to the shape of the protruding tip of the fuel injection valve, and the heat shield member is made of a material having higher heat resistance than the material of the cylinder head, and
A cylinder head for a diesel engine, in which the heat shielding member is fitted to a side of a fuel injection valve mounting portion of the cylinder head that faces a combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978145608U JPS591103Y2 (en) | 1978-10-23 | 1978-10-23 | Diesel engine cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978145608U JPS591103Y2 (en) | 1978-10-23 | 1978-10-23 | Diesel engine cylinder head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5562851U JPS5562851U (en) | 1980-04-28 |
| JPS591103Y2 true JPS591103Y2 (en) | 1984-01-12 |
Family
ID=29125327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1978145608U Expired JPS591103Y2 (en) | 1978-10-23 | 1978-10-23 | Diesel engine cylinder head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS591103Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48110529U (en) * | 1972-03-30 | 1973-12-19 | ||
| JPS5129124U (en) * | 1974-08-28 | 1976-03-02 |
-
1978
- 1978-10-23 JP JP1978145608U patent/JPS591103Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5562851U (en) | 1980-04-28 |
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