JPS5990032U

JPS5990032U - Direct injection diesel engine combustion chamber

Info

Publication number: JPS5990032U
Application number: JP18596082U
Authority: JP
Inventors: 米田　賢二
Original assignee: 日産自動車株式会社
Priority date: 1982-12-10
Filing date: 1982-12-10
Publication date: 1984-06-18

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来のピストン燃焼室を示す平面図、第２図は
第１図に示すピストン燃焼室の■−■線断面図、第３図
、第４図はピストン燃焼室の内周壁に衝突した燃料の微
粒子化状況を示す図、第５図はこの考案に係る第１実施
例のピストン燃焼室を示す平面図、第６図は第５図に示
すピストン燃焼室のＶＩ−ＶＩ線断面図、第７図はピス
トン燃焼室の内周壁に形成した球状の突起部に衝突した
燃料の微粒子化状況を示す図、第８図はこの考案に係る
第２実施例のピストン燃焼室を示す平面図、第９図は第
８図に示すピストン燃焼室のＩＸ−ＩＸ線断面図、第１
０図はこの考案に係る第３実施例のピストン燃焼室を示
す平面図、第１１図は第１０図に示すピストン燃焼室の
Ｘｌ−Ｘ１線断面図である。３・・・・・・ピストン、６．１１・・・・・・キャビ
ティ燃焼室（ピストン燃焼室）、９・・・・・・燃料の
噴霧軸、１３・・・・・・球状の突起部、１６・・・・
・・ドーナツ状突起部。ｌ　　　　　　　　　　　　　Ｖｌ −エ第６図・−・−―Figure 1 is a plan view showing a conventional piston combustion chamber, Figure 2 is a sectional view taken along the line ■-■ of the piston combustion chamber shown in Figure 1, and Figures 3 and 4 are collisions with the inner peripheral wall of the piston combustion chamber. Fig. 5 is a plan view showing the piston combustion chamber of the first embodiment of this invention, and Fig. 6 is a sectional view taken along the line VI-VI of the piston combustion chamber shown in Fig. 5. , FIG. 7 is a diagram showing the state of atomization of fuel that collides with a spherical protrusion formed on the inner circumferential wall of the piston combustion chamber, and FIG. 8 is a plan view showing the piston combustion chamber of the second embodiment of this invention. , FIG. 9 is a sectional view taken along line IX-IX of the piston combustion chamber shown in FIG.
0 is a plan view showing a piston combustion chamber of a third embodiment of this invention, and FIG. 11 is a sectional view taken along the line Xl-X1 of the piston combustion chamber shown in FIG. 10. 3... Piston, 6.11... Cavity combustion chamber (piston combustion chamber), 9... Fuel spray axis, 13... Spherical protrusion , 16...
...Doughnut-shaped protrusion. l Vl -D Figure 6 ---

Claims

[Scope of utility model registration request]

In a piston combustion chamber of a direct injection diesel engine having a substantially cylindrical piston combustion chamber bored at the top of the piston, a protrusion having a convex curved surface on the inner circumferential wall of the piston combustion chamber is located at the center of curvature of the convex curved surface. A piston combustion chamber for a direct injection diesel engine, characterized in that the piston combustion chamber is formed at a position that corresponds to an extension of a fuel spray axis.