JPS5952151U

JPS5952151U - Engine cylinder block structure

Info

Publication number: JPS5952151U
Application number: JP14914882U
Authority: JP
Inventors: 児玉　宏志
Original assignee: マツダ株式会社
Priority date: 1982-09-30
Filing date: 1982-09-30
Publication date: 1984-04-05
Also published as: JPS6350440Y2

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来のシリンダヘッド締着によるボア壁変形状
態を示すシリンダブロックの要部の断面図、第２図は本
考案の一実施例を示すシリンダブロックの平面図、第３
図は第２図の■−■断面図、・第４図は本考案のボア壁
変形状態を示すもので第２図のＩＶ−ＩＶ断面図である
。１・・・渦流式燃焼室、２・・・口金、３・・・シリン
ダブロック、４・・・シリンダボア壁、５・・・シリン
ダブロック外壁、６・・・橋梁部、６ａ・・・ガスシー
ル部、６ｂ・・・口金の下側部、７・・・ボアグロメッ
ト、９・・・シリンダーベッド、Ｔ１・・・ガスシール
部肉厚、Ｔ２・・・口金の下側部肉厚、Ｆ・・・シリン
ダヘッドボルト軸力、Ｐ・・・押付は力。Fig. 1 is a sectional view of the main part of a cylinder block showing the deformed state of the bore wall due to the tightening of the conventional cylinder head; Fig. 2 is a plan view of the cylinder block showing an embodiment of the present invention;
The figure is a cross-sectional view taken along the line ■--■ in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line IV--IV in FIG. 2, showing the deformed state of the bore wall of the present invention. DESCRIPTION OF SYMBOLS 1... Whirlpool combustion chamber, 2... Mouthpiece, 3... Cylinder block, 4... Cylinder bore wall, 5... Cylinder block outer wall, 6... Bridge portion, 6a... Gas seal Part, 6b... Lower part of the cap, 7... Bore grommet, 9... Cylinder bed, T1... Gas seal part wall thickness, T2... Lower part wall thickness of the cap, F. ... Cylinder head bolt axial force, P... Pressing is force.

Claims

[Scope of utility model registration request]

A bridge comprising a cylinder head in which a mouthpiece of a swirl combustion chamber is partially disposed outside a cylinder bore wall, and the cylinder bore wall and a cylinder block outer wall are connected to a portion of a cylinder block top deck portion facing the mouthpiece. In the cylinder block structure, the wall thickness of the bridge portion is made different between a gas seal portion outside the outer periphery of the mouthpiece and near the outer periphery, and a lower side portion of the mouthpiece excluding this gas seal portion, and An engine cylinder block structure characterized by having a lower wall thickness that is thinner than a gas seal wall thickness.