JPS62152015U

JPS62152015U -

Info

Publication number: JPS62152015U
Application number: JP4035186U
Authority: JP
Priority date: 1986-03-18
Filing date: 1986-03-18
Publication date: 1987-09-26
Also published as: JPH0442490Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係る排気マニホー
ルド構造を備えた多気筒エンジンの要部平面図、
第２図は第１図の−矢視図、第３図は第１図
の−矢視図、第４図は従来の排気マニホール
ド構造をもつ多気筒エンジンの要部側面図である
。１……エンジン本体、２……シリンダブロツク
、３……シリンダヘツド、４……排気マニホール
ド、５……取付ボルト、１１，１２，１３，１４
……排気通口、２１，２２，２３，２４……吸気
通路、３１，３２，３３，３４……取付フランジ
、３７，３８，３９……補強リブ、４１……マニ
ホールド取付孔、５１Ａ，５１Ｂ……ボルト取付
孔、５２Ａ，５２Ｂ……ボルト取付孔、５３Ａ，
５３Ｂ……ボルト取付孔、５４Ａ，５４Ｂ……ボ
ルト取付孔。 FIG. 1 is a plan view of essential parts of a multi-cylinder engine equipped with an exhaust manifold structure according to an embodiment of the present invention;
FIG. 2 is a view taken along the - arrow in FIG. 1, FIG. 3 is a view taken along the - arrow in FIG. 1, and FIG. 4 is a side view of essential parts of a multi-cylinder engine having a conventional exhaust manifold structure. 1...Engine body, 2...Cylinder block, 3...Cylinder head, 4...Exhaust manifold, 5...Mounting bolt, 11, 12, 13, 14
...Exhaust vent, 21,22,23,24...Intake passage, 31,32,33,34...Mounting flange, 37,38,39...Reinforcement rib, 41...Manifold mounting hole, 51A, 51B ...Bolt mounting hole, 52A, 52B...Bolt mounting hole, 53A,
53B...Bolt mounting hole, 54A, 54B...Bolt mounting hole.

Claims

[Scope of utility model registration request]

An exhaust manifold having a plurality of exhaust passages that can overlap and communicate with each exhaust vent of the engine body is installed on a side wall of the engine body having a plurality of exhaust vents communicating with the combustion chamber. The vent and each exhaust passage of the exhaust manifold are brought into contact with each other in an overlapping state, and
A manifold mounting hole is provided on each side of each exhaust vent, sandwiching the center of each exhaust vent on the side wall of the engine body in the short axis direction of the exhaust manifold, and each exhaust of the exhaust manifold. The above-mentioned exhaust gas is connected to the manifold mounting hole in the passage part with two bolt insertion holes provided in each of the exhaust passages so as to be able to overlap and communicate with each other. In an engine in which the manifold is fastened and fixed to the side wall of the engine body, at least a pair of bolts among the bolt mounting holes of the exhaust manifold correspond to an exhaust passage located at an end in the longitudinal direction of the exhaust manifold. An exhaust manifold structure for a multi-cylinder engine, characterized in that at least one of the mounting holes is an elongated hole extending in the direction of a straight line connecting the centers of the pair of bolt mounting holes.