JPH03110134U - - Google Patents
Info
- Publication number
- JPH03110134U JPH03110134U JP1901690U JP1901690U JPH03110134U JP H03110134 U JPH03110134 U JP H03110134U JP 1901690 U JP1901690 U JP 1901690U JP 1901690 U JP1901690 U JP 1901690U JP H03110134 U JPH03110134 U JP H03110134U
- Authority
- JP
- Japan
- Prior art keywords
- combustion chamber
- piston
- sub
- injection
- oil
- 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
- 238000002485 combustion reaction Methods 0.000 claims description 17
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
Description
第１図は本考案の第一実施例に係る直噴式デイ
ーゼルエンジンの燃焼改善構造の断面図、第２図
はその平面図、第３図は第一実施例の燃焼効率−
クランク角線図、第４図は第二実施例に係る直噴
式デイーゼルエンジンの燃焼改善構造の断面図、
第５図は従来の直噴式デイーゼルエンジンの燃焼
室構造の要部断面図、第６図はその平面図、第７
図は従来の燃焼効率−クランク角線図である。
１……主燃焼室、３……キヤビテイ、４……突
起、５……副燃焼室、７……連通孔、９……燃料
噴射ノズル、１１，２１……ピストン、１７……
オイルジエツト。
Fig. 1 is a sectional view of the combustion improvement structure of a direct injection diesel engine according to the first embodiment of the present invention, Fig. 2 is a plan view thereof, and Fig. 3 is the combustion efficiency of the first embodiment.
Crank angle diagram, FIG. 4 is a cross-sectional view of the combustion improvement structure of the direct injection diesel engine according to the second embodiment,
Figure 5 is a sectional view of the main part of the combustion chamber structure of a conventional direct injection diesel engine, Figure 6 is its plan view, and Figure 7
The figure is a conventional combustion efficiency-crank angle diagram. 1...Main combustion chamber, 3...Cavity, 4...Protrusion, 5...Sub-combustion chamber, 7...Communication hole, 9...Fuel injection nozzle, 11, 21...Piston, 17...
oil jet.
Claims (1)
の底面中央に突起部を形成し、当該突起部内に、
上方に開口部を有する副燃焼室を形成すると共に
、当該副燃焼室と上記主燃焼室とを連通する連通
孔を主燃焼室のスワールを付勢する方向に設け、
且つ燃料噴射ノズルに、主燃焼室に燃料を噴射す
る噴射孔と副燃焼室に燃料を噴射する噴射孔を設
け、前記ピストンの下方にピストンの底部に向け
てオイルを噴射するピストン冷却用オイルジエツ
トを配置した直噴式デイーゼルエンジンに於いて
、上記ピストンの副燃焼室の下部に上記オイルジ
エツトのオイルにより副燃焼室を冷却する冷却部
を設けると共に、上記オイルジエツトの噴射を当
該冷却部に集中させてなることを特徴とする直噴
式デイーゼルエンジンの燃焼改善構造。 A protrusion is formed in the center of the bottom of the cavity that forms the main combustion chamber of the piston head, and within the protrusion,
forming a sub-combustion chamber having an opening above, and providing a communication hole for communicating the sub-combustion chamber and the main combustion chamber in a direction that urges the swirl of the main combustion chamber;
The fuel injection nozzle is provided with an injection hole for injecting fuel into the main combustion chamber and an injection hole for injecting fuel into the auxiliary combustion chamber, and a piston cooling oil jet is provided below the piston to inject oil toward the bottom of the piston. In the direct-injection diesel engine, a cooling section is provided below the sub-combustion chamber of the piston to cool the sub-combustion chamber with oil from the oil jet, and injection of the oil jet is concentrated in the cooling section. A combustion improvement structure for direct injection diesel engines featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1901690U JPH03110134U (en) | 1990-02-27 | 1990-02-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1901690U JPH03110134U (en) | 1990-02-27 | 1990-02-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03110134U true JPH03110134U (en) | 1991-11-12 |
Family
ID=31522152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1901690U Pending JPH03110134U (en) | 1990-02-27 | 1990-02-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03110134U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010108749A1 (en) * | 2009-03-26 | 2010-09-30 | Federal-Mogul Nürnberg GmbH | Piston for an internal combustion engine |
| AT522701A1 (en) * | 2019-06-28 | 2021-01-15 | Avl List Gmbh | PISTON |
-
1990
- 1990-02-27 JP JP1901690U patent/JPH03110134U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010108749A1 (en) * | 2009-03-26 | 2010-09-30 | Federal-Mogul Nürnberg GmbH | Piston for an internal combustion engine |
| AT522701A1 (en) * | 2019-06-28 | 2021-01-15 | Avl List Gmbh | PISTON |
| AT522701B1 (en) * | 2019-06-28 | 2021-06-15 | Avl List Gmbh | PISTON |