JPS6339376Y2 - - Google Patents
Info
- Publication number
- JPS6339376Y2 JPS6339376Y2 JP18438982U JP18438982U JPS6339376Y2 JP S6339376 Y2 JPS6339376 Y2 JP S6339376Y2 JP 18438982 U JP18438982 U JP 18438982U JP 18438982 U JP18438982 U JP 18438982U JP S6339376 Y2 JPS6339376 Y2 JP S6339376Y2
- Authority
- JP
- Japan
- Prior art keywords
- heat shield
- fuel
- sub
- nozzle hole
- 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.)
- Expired
Links
- 239000000446 fuel Substances 0.000 claims description 20
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 description 14
- 230000008020 evaporation Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Description
【考案の詳細な説明】
この考案は、渦流室式デイーゼルエンジンのヒ
ートシールドに係わり、更に詳しくはエンジンの
振動並びに騒音を低減させるようにしたヒートシ
ールドに関するものである。[Detailed Description of the Invention] This invention relates to a heat shield for a swirl chamber type diesel engine, and more particularly to a heat shield that reduces engine vibration and noise.
従来、副噴孔を備えたノズル（ピントウノズ
ル）にあつては、副噴孔から噴射された燃料が、
燃焼室内で急激に燃焼するため、圧力上昇が高く
なりエンジンの騒音並びに振動が大きくなるとい
う問題があつた。 Conventionally, in a nozzle equipped with a sub-nozzle (pinto nozzle), the fuel injected from the sub-nozzle is
Because of the rapid combustion within the combustion chamber, there was a problem in that the pressure rise was high and the noise and vibration of the engine became large.
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副噴孔か
ら噴射された燃料の蒸発を遅らせ、緩慢な燃焼を
可能とすることによつて、燃焼室内での急激な圧
力上昇を防止し、騒音並びに振動の低減を図るよ
うにした渦流室式デイーゼルエンジンのヒートシ
ールドを提供するものである。 This invention was devised by focusing on the conventional problems, and its purpose is to delay the evaporation of the fuel injected from the sub-nozzle hole and to enable slow combustion. The present invention provides a heat shield for a swirl chamber type diesel engine that prevents a sudden pressure rise in a combustion chamber and reduces noise and vibration.
この考案は、上記目的を達成するため副噴孔か
ら噴射される燃料の当接するヒートシールドの壁
面に燃料溜め用の凹部を形成し、この凹部に噴霧
の一部を溜めることにより燃料の蒸発並びに急激
な燃焼を防止するようにしたことを要旨とするも
のである。 In order to achieve the above object, this invention forms a fuel reservoir recess on the wall surface of the heat shield where the fuel injected from the sub-nozzle comes into contact, and by storing a part of the spray in this recess, fuel evaporation and The gist of this is to prevent rapid combustion.
以下、添付図面に基づいてこの考案の実施例を
説明する。 Hereinafter, embodiments of this invention will be described based on the accompanying drawings.
第１図はこの考案を実施した副室式燃焼室の断
面図を示し、１はシリンダ、２はピストン、３は
渦流室４を備えたシリンダヘツド、５は燃焼室で
あつて、前記渦流室４にはグロープラグ６と、主
噴孔７及び副噴孔８を備えたインジエクシヨンノ
ズル９が装着され、更にインジエクシヨンノズル
９の先端側には、ヒートシールド１０が設けられ
ている。 FIG. 1 shows a cross-sectional view of a sub-chamber type combustion chamber in which this invention is implemented, in which 1 is a cylinder, 2 is a piston, 3 is a cylinder head equipped with a swirl chamber 4, and 5 is a combustion chamber, which includes the swirl chamber. 4 is attached with a glow plug 6 and an injection nozzle 9 having a main nozzle hole 7 and a sub-nozzle hole 8, and furthermore, a heat shield 10 is provided on the tip side of the injection nozzle 9.
このヒートシールド１０の前記副噴孔８から噴
射される燃料Ｇの当接面１０ａには、第２図及び
第３図ａに示すように、副噴孔８からの噴射され
た燃料Ｇを溜めるための凹部１１が形成されてい
る。 The contact surface 10a of the heat shield 10 for the fuel G injected from the sub-nozzle holes 8 stores the fuel G injected from the sub-nozzle holes 8, as shown in FIGS. 2 and 3a. A recess 11 is formed for this purpose.
この凹部１１は、燃焼室５側に向つて傾斜し、
その先端部１１ａには球状の燃料溜め部が形成さ
れている。また第３図ｂは燃料Ｇを溜める他の実
施例を示し、凹部１１を、ヒートシールド１０の
燃料当接面１０ａに複数形成し、その形状を略菱
形状にしたものである。 This recessed portion 11 is inclined toward the combustion chamber 5 side,
A spherical fuel reservoir is formed at the tip 11a. FIG. 3b shows another embodiment for storing fuel G, in which a plurality of recesses 11 are formed on the fuel contacting surface 10a of the heat shield 10, and the recesses 11 are approximately diamond-shaped.
この考案は上記のように構成され、副噴孔８か
らの燃料Ｇは、ヒートシールド１０の凹部１１に
向つて噴射される。噴射された燃料Ｇの一部はヒ
ートシールド１０の表面に当接し、飛散及び蒸発
により燃焼が起る。一方、凹部１１内には、噴射
された燃料の一部が入り込み蒸発が遅れる。 This invention is constructed as described above, and the fuel G from the sub-nozzle hole 8 is injected toward the recess 11 of the heat shield 10. A part of the injected fuel G comes into contact with the surface of the heat shield 10, and combustion occurs due to scattering and evaporation. On the other hand, a portion of the injected fuel enters the recess 11 and evaporation is delayed.
これにより、緩慢な燃焼が行なわれるものであ
る。 This results in slow combustion.
この考案は上記のように主噴孔と副噴孔とを備
えたインジエクシヨンノズルをヒートシールドを
介して、シリンダヘツドに装着して成る渦流室式
デイーゼルエンジンにおいて、前記副噴孔から噴
射される燃料の当接するヒートシールドの壁面
に、燃料溜め用の凹部を形成したため、噴射され
た燃料を凹部に溜めることによつて、燃料の蒸発
を防止し、これにより緩慢な燃焼を行なわせるこ
とにより燃焼室内の急激な圧力上昇を防止し、エ
ンジンの騒音並びに振動を有効に低減できる効果
がある。 This invention is based on a whirlpool chamber type diesel engine in which an injection nozzle equipped with a main nozzle hole and a sub-nozzle hole is attached to a cylinder head via a heat shield as described above. A recess for a fuel reservoir is formed on the wall of the heat shield where the fuel comes into contact, so that the injected fuel is stored in the recess, preventing fuel evaporation and causing slow combustion. This has the effect of preventing a sudden pressure rise in the combustion chamber and effectively reducing engine noise and vibration.
第１図はこの考案を実施した副室式燃焼室の断
面図、第２図は第１図の要部拡大断面図、第３図
ａはヒートシールドに形成された凹部の拡大図、
第３図ｂは他の実施例を示す断面図である。
３……シリンダヘツド、４……渦流室、５……
燃焼室、７……主噴孔、８……副噴孔、９……イ
ンジエクシヨンノズル、１０……ヒートシール
ド、１０ａ……当接面、１１……凹部、Ｇ……燃
料。
Fig. 1 is a cross-sectional view of a pre-chamber type combustion chamber in which this invention was implemented, Fig. 2 is an enlarged sectional view of the main part of Fig. 1, Fig. 3a is an enlarged view of a recess formed in the heat shield,
FIG. 3b is a sectional view showing another embodiment. 3...Cylinder head, 4...Swirl chamber, 5...
Combustion chamber, 7... Main nozzle hole, 8... Sub-nozzle hole, 9... Injection nozzle, 10... Heat shield, 10a... Contact surface, 11... Recess, G... Fuel.
Claims (1)
ズルを、ヒートシールドを介してシリンダヘツド
に装着して成る渦流室式デイーゼルエンジンにお
いて、前記副噴孔から噴射される燃料の当接する
ヒートシールドの壁面に、燃料溜め用の凹部を形
成したことを特徴とする渦流室式デイーゼルエン
ジンのヒートシールド。 In a swirl chamber type diesel engine comprising an injection nozzle equipped with a main nozzle hole and a sub-nozzle hole, which is attached to a cylinder head via a heat shield, the heat shield is in contact with the fuel injected from the sub-nozzle hole. A heat shield for a swirl chamber type diesel engine characterized by a recess formed in the wall surface for a fuel reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18438982U JPS5988218U (en) | 1982-12-07 | 1982-12-07 | Heat shield for swirl chamber type diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18438982U JPS5988218U (en) | 1982-12-07 | 1982-12-07 | Heat shield for swirl chamber type diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5988218U JPS5988218U (en) | 1984-06-14 |
| JPS6339376Y2 true JPS6339376Y2 (en) | 1988-10-17 |
Family
ID=30398820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18438982U Granted JPS5988218U (en) | 1982-12-07 | 1982-12-07 | Heat shield for swirl chamber type diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5988218U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6114421A (en) * | 1984-06-29 | 1986-01-22 | Isuzu Motors Ltd | Diesel engine |
-
1982
- 1982-12-07 JP JP18438982U patent/JPS5988218U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5988218U (en) | 1984-06-14 |
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