JPH0243425U

JPH0243425U -

Info

Publication number: JPH0243425U
Application number: JP12125688U
Authority: JP
Priority date: 1988-09-16
Filing date: 1988-09-16
Publication date: 1990-03-26

Description

[Brief explanation of drawings]

第１図は本考案の第一実施例に係る燃焼室構造
の要部断面図、第２図は燃料の噴射状態を示すピ
ストンの平面図、第３図は本考案の第二実施例に
於ける燃料の噴射状態を示すピストンの平面図、
第４図は第二実施例に係る燃焼室構造の要部断面
図、第５図は本考案の第三実施例に於ける燃料の
噴射状態を示すピストンの平面図、第６図は従来
の燃焼室構造の要部断面図、第７図は従来の燃料
の噴射状態を示す説明図、第８図は従来のシリン
ダヘツドの底面図である。２３……ピストン、２３ａ……ピストン頂面、
２５……燃焼室、２７……衝突面、２９……傾斜
面、３３……燃料噴射ノズル、３５……主噴孔、
３７……副噴孔、３９……点火プラグ、Ｆ……燃
料。 Fig. 1 is a cross-sectional view of the main part of the combustion chamber structure according to the first embodiment of the present invention, Fig. 2 is a plan view of the piston showing the fuel injection state, and Fig. 3 is a cross-sectional view of the combustion chamber structure according to the second embodiment of the present invention. A plan view of the piston showing the state of fuel injection;
Fig. 4 is a sectional view of the main part of the combustion chamber structure according to the second embodiment, Fig. 5 is a plan view of the piston showing the fuel injection state in the third embodiment of the present invention, and Fig. 6 is the conventional one. FIG. 7 is an explanatory view showing a conventional fuel injection state, and FIG. 8 is a bottom view of a conventional cylinder head. 23... Piston, 23a... Piston top surface,
25... Combustion chamber, 27... Collision surface, 29... Inclined surface, 33... Fuel injection nozzle, 35... Main injection hole,
37...Sub-nozzle hole, 39...Spark plug, F...Fuel.

Claims

[Scope of utility model registration request]

In a direct injection spark ignition internal combustion engine in which a cavity is provided on the top surface of the piston to form a combustion chamber, and a fuel injection nozzle and a spark plug are exposed inside the combustion chamber, the fuel injection nozzle is placed facing the periphery of the combustion chamber. The fuel injection nozzle is provided with a main injection hole that injects the fuel in a fan shape toward the opposite peripheral edge of the combustion chamber, and a sub injection hole that injects the fuel downward. A direct injection type characterized by forming an impact surface shallower than the bottom surface of the combustion chamber, so that the fuel from the auxiliary nozzle hole that collides with the impact surface and is scattered overlaps with the fuel injected from the main nozzle hole. Combustion chamber structure of spark ignition internal combustion engine.