JPH0397538U - - Google Patents
Info
- Publication number
- JPH0397538U JPH0397538U JP591290U JP591290U JPH0397538U JP H0397538 U JPH0397538 U JP H0397538U JP 591290 U JP591290 U JP 591290U JP 591290 U JP591290 U JP 591290U JP H0397538 U JPH0397538 U JP H0397538U
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- piston
- cavity
- diesel engine
- shape
- 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.)
- Pending
Links
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Description
第１図は本考案に係る直接噴射式デイーゼルエ
ンジンの一実施例を示す要部断面図、第２図は第
１図に示したピストンの上面図、第３図は同上デ
イーゼルエンジンの第１の変形例を示した要部断
面図、第４図は第３図に示したピストンの上面図
、第５図は同上デイーゼルエンジンの第２の変形
例を示した要部断面図、第６図は第５図に示した
ピストンの上面図、第７図はスロツトル型噴射ノ
ズルで噴射された燃料が拡散する状態を説明する
ための模式図、第８図はノズルから噴射された燃
料が噴霧粒になる過程を説明するための模式図、
第９図は従来の直接噴射式デイーゼルエンジンの
一例を示した要部断面図、第１０図は第９図に示
したピストンの上面図である。
１……デイーゼルエンジン、２……シリンダー
ヘツド、３，２３……スロツトル型噴射ノズル、
４……シリンダーボデイ、５，２５……ピストン
、５ａ，２５ａ……ピストン頭部、６……頭部開
口、７……キヤビテイ、８，２８……燃料、１０
，３０……燃焼室。
Fig. 1 is a cross-sectional view of essential parts showing one embodiment of a direct injection diesel engine according to the present invention, Fig. 2 is a top view of the piston shown in Fig. 1, and Fig. 3 is a first view of the piston shown in Fig. 1. 4 is a top view of the piston shown in FIG. 3, FIG. 5 is a sectional view of the main part showing a second modification of the same diesel engine, and FIG. 6 is a sectional view of the main part showing a modified example. Figure 5 is a top view of the piston, Figure 7 is a schematic diagram to explain how the fuel injected by the throttle type injection nozzle diffuses, and Figure 8 shows the fuel injected from the nozzle turning into atomized particles. A schematic diagram to explain the process of
FIG. 9 is a sectional view of a main part of an example of a conventional direct injection diesel engine, and FIG. 10 is a top view of the piston shown in FIG. 1... Diesel engine, 2... Cylinder head, 3, 23... Throttle type injection nozzle,
4... Cylinder body, 5, 25... Piston, 5a, 25a... Piston head, 6... Head opening, 7... Cavity, 8, 28... Fuel, 10
, 30... combustion chamber.
Claims (1)
られたキヤビテイとシリンダーヘツドとの間に形
成される燃焼室内にノズルで燃料を直接噴射して
燃焼させる直接噴射式デイーゼルエンジンであつ
て、前記ノズルとしてスロツトル型噴射ノズルを
使用するとともに、前記ノズルから噴射されて霧
化する燃料の発達形状と略一致する放物線の外側
に前記キヤビテイの内壁面が沿うようにして前記
キヤビテイの縦断面形状を略ちようちん形に前記
開口を狭めて形成したことを特徴とする直接噴射
式デイーゼルエンジン。 A direct injection diesel engine that directly injects and burns fuel with a nozzle into a combustion chamber that opens at the head of a piston and is formed between a cavity provided in the piston and a cylinder head, wherein the nozzle is In addition to using a throttle-type injection nozzle, the vertical cross-sectional shape of the cavity is shortened so that the inner wall surface of the cavity follows the outside of a parabola that approximately matches the development shape of the fuel that is injected from the nozzle and atomized. A direct injection diesel engine characterized in that the opening is formed by narrowing it into a china shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP591290U JPH0397538U (en) | 1990-01-25 | 1990-01-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP591290U JPH0397538U (en) | 1990-01-25 | 1990-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0397538U true JPH0397538U (en) | 1991-10-08 |
Family
ID=31509599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP591290U Pending JPH0397538U (en) | 1990-01-25 | 1990-01-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0397538U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720513A (en) * | 1980-07-11 | 1982-02-03 | Nissan Motor Co Ltd | Fuel supply device of internal combustion engine |
-
1990
- 1990-01-25 JP JP591290U patent/JPH0397538U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720513A (en) * | 1980-07-11 | 1982-02-03 | Nissan Motor Co Ltd | Fuel supply device of internal combustion engine |