JPS6197532U

JPS6197532U -

Info

Publication number: JPS6197532U
Application number: JP17818985U
Authority: JP
Priority date: 1985-11-21
Filing date: 1985-11-21
Publication date: 1986-06-23
Also published as: JPS6224010Y2

Description

[Brief explanation of the drawing]

第１図は従来のバスタブ型燃焼室を備えた直接
燃料噴射式デイーゼル機関の縦断側面図、第２図
は従来のトロイダル型燃焼室を備えた直接燃料噴
射式デイーゼル機関の縦断側面図、第３図はこれ
らの機関における燃焼室内スワール速度分布を図
示した説明図、第４図は本考案に係る直接燃料噴
射式内燃機関の一実施例を図示した要部平面図、
第５図は第４図の−線に沿つて截断した縦断
側面図、第６図は第４図の−線に沿つて截断
した横断面図、第７図は他の実施例における第６
図と同様な横断面図、第８図はその要部欠截斜面
図、第９図はさらに他の実施例における第７図と
同様な横断面図、第１０図はその要部欠截斜面図
、第１１図さらに他の実施例の要部平面図、第１
２図は第１１図の−線に沿つて截断した
縦断面図、第１３図はその要部欠截斜面図、第１
４図は同実施例の作用を図示した平面図、第１５
図はその要部欠截斜面図である。１…シリンダライナ、２…ピストン、３…キヤ
ビテイ、４…シリンダヘツド、５…燃料弁、６，
７，８，１０…空気案内用突起、９…キヤビテイ
。 Figure 1 is a vertical side view of a direct fuel injection diesel engine with a conventional bathtub-type combustion chamber, Figure 2 is a vertical side view of a direct fuel injection diesel engine with a conventional toroidal combustion chamber, and Figure 3 is a vertical side view of a direct fuel injection diesel engine with a conventional toroidal combustion chamber. FIG. 4 is an explanatory diagram illustrating the swirl velocity distribution in the combustion chamber in these engines, and FIG.
5 is a vertical sectional side view taken along the - line in FIG. 4, FIG. 6 is a cross sectional view taken along the - line in FIG. 4, and FIG. 7 is a sectional view taken along the - line in FIG.
FIG. 8 is a cross-sectional view similar to the one shown in the figure, FIG. 8 is a cut-away slope view of the main part, FIG. FIG. 11 is a plan view of main parts of another embodiment, 1st
Figure 2 is a vertical sectional view cut along the - line in Figure 11, Figure 13 is a cutaway slope view of the main part, and Figure 1
Figure 4 is a plan view illustrating the operation of the same embodiment;
The figure is a cutaway slope view of the main part. 1... Cylinder liner, 2... Piston, 3... Cavity, 4... Cylinder head, 5... Fuel valve, 6,
7, 8, 10... Air guide projection, 9... Cavity.

Claims

[Scope of utility model registration request]

In a direct injection internal combustion engine that generates a swirl in a cavity recessed in the upper surface of the piston and injects fuel into the swirl, an air swirl is formed from the side wall of the combustion chamber to the center of the cavity from the side wall of the cavity to the bottom surface of the cavity. A direct fuel injection type characterized in that a plurality of air guide protrusions that deflect the air are arranged in a direction that draws an inscribed circle on the bottom surface of the combustion chamber, and the height of the protrusions decreases toward the inside of the combustion chamber. Internal combustion engine.