JPH03118230U

JPH03118230U -

Info

Publication number: JPH03118230U
Application number: JP2767290U
Authority: JP
Priority date: 1990-03-20
Filing date: 1990-03-20
Publication date: 1991-12-06

Description

[Brief explanation of drawings]

第１図は本考案に係るデイーゼル機関の渦流室
構造の一実施例を示す正面断面図、第２図は同上
実施例の作用・効果を示す正面断面図、第３図は
他の実施例を示す正面断面図、第４図は更に他の
実施例を示す正面断面図、第５図は従来の渦流室
構造の例を示す正面断面図、第６図及び第７図は
同上従来例における渦流室形成部材の一部断面斜
視図及び断面図である。３……シリンダヘツド、４……主燃焼室、５…
…渦流室形成用凹所、６……凹所、８……渦流室
、９……噴口、１７……渦流室形成部材、１７ａ
……上部側周壁部、１７ｂ……フランジ部、ａ，
ｂ，ｄ……テーパ面、ｃ……クリアランス。 Fig. 1 is a front sectional view showing one embodiment of the swirl chamber structure of a diesel engine according to the present invention, Fig. 2 is a front sectional view showing the operation and effect of the same embodiment, and Fig. 3 is a front sectional view showing another embodiment. 4 is a front sectional view showing still another embodiment, FIG. 5 is a front sectional view showing an example of a conventional swirl chamber structure, and FIGS. 6 and 7 are a front sectional view showing an example of a conventional swirl chamber structure. FIG. 2 is a partially sectional perspective view and a sectional view of a chamber forming member. 3... Cylinder head, 4... Main combustion chamber, 5...
... recess for forming swirl chamber, 6... recess, 8... swirl chamber, 9... spout, 17... swirl chamber forming member, 17a
...Upper side peripheral wall part, 17b...Flange part, a,
b, d...Tapered surface, c...Clearance.

Claims

[Scope of utility model registration request]

A swirl chamber forming member comprising a swirl chamber forming recess on the inner wall surface of the cylinder head corresponding to the upper part of the main combustion chamber, and a recess located within the recess to form the swirl chamber together with the recess. In the swirl chamber structure of a diesel engine, the swirl chamber structure of a diesel engine is provided with a nozzle inserted into the recessed bottom wall of the swirl chamber forming member to communicate the swirl chamber and the main combustion chamber. At the same time, the flange portion formed by protruding from the outer peripheral surface of the bottom wall of the swirl chamber forming member is press-fitted into the swirl chamber forming recess with a clearance, and the swirl chamber is A tapered surface is formed on either the outer circumferential surface of the upper circumferential wall of the forming member or the inner circumferential surface of the swirl chamber forming recess so that the clearance gradually increases from the bottom to the top of the swirl chamber forming member. A vortex chamber structure for a diesel engine characterized by the following features: