JPH02144649U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の第一実施例に係る吸気騒音低
減装置の一部切欠き平面図、第２図は本考案の第
二実施例に係る吸気騒音低減装置の一部切欠き平
面図、第３図は本考案の他の実施例に係る吸気騒
音低減装置の要部概略構成図、第４図はＥＧＲ装
置を設けた従来の内燃機関の平面図である。 １，１ａ…吸気マニホールド、３…エンジン、
５…排気マニホールド、７…ＥＧＲバルブ、１１
…吸気通路、１３…吸気シヤツタ、１７，１７ａ
，２７，４５，４７…ＥＧＲパイプ、２３，３５
，３９…匣体、２５，３７…小孔。 FIG. 1 is a partially cutaway plan view of an intake noise reduction device according to a first embodiment of the present invention, FIG. 2 is a partially cutaway plan view of an intake noise reduction device according to a second embodiment of the present invention, FIG. 3 is a schematic diagram of the main parts of an intake noise reduction device according to another embodiment of the present invention, and FIG. 4 is a plan view of a conventional internal combustion engine equipped with an EGR device. 1, 1a...Intake manifold, 3...Engine,
5...Exhaust manifold, 7...EGR valve, 11
...Intake passage, 13...Intake shutter, 17, 17a
, 27, 45, 47...EGR pipe, 23, 35
, 39... box body, 25, 37... small hole.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ＥＧＲバルブを装着したＥＧＲパイプを介して
排気ガスをエンジンの吸気側に還流させる内燃機
関のＥＧＲ装置に於て、上記ＥＧＲパイプのＥＧ
Ｒバルブ下流側の外周を匣体で密閉すると共に、
当該匣体内とＥＧＲパイプ内を連通して匣体内を
共鳴室としたことを特徴とする内燃機関の吸気騒
音低減装置。 In an EGR system for an internal combustion engine that recirculates exhaust gas to the intake side of the engine via an EGR pipe equipped with an EGR valve,
While sealing the outer periphery of the downstream side of the R valve with a casing,
An intake noise reduction device for an internal combustion engine, characterized in that the housing and the inside of the EGR pipe are communicated with each other to form a resonance chamber inside the housing.