JPH09317579A - Intake device for internal combustion engine - Google Patents

Intake device for internal combustion engine

Info

Publication number
JPH09317579A
JPH09317579A JP8161000A JP16100096A JPH09317579A JP H09317579 A JPH09317579 A JP H09317579A JP 8161000 A JP8161000 A JP 8161000A JP 16100096 A JP16100096 A JP 16100096A JP H09317579 A JPH09317579 A JP H09317579A
Authority
JP
Japan
Prior art keywords
egr
intake manifold
branch pipe
intake
internal combustion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP8161000A
Other languages
Japanese (ja)
Inventor
Masanori To
昌則 塘
Taishin Suzuki
泰臣 鈴木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzuki Motor Corp
Original Assignee
Suzuki Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzuki Motor Corp filed Critical Suzuki Motor Corp
Priority to JP8161000A priority Critical patent/JPH09317579A/en
Publication of JPH09317579A publication Critical patent/JPH09317579A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Exhaust-Gas Circulating Devices (AREA)

Abstract

PROBLEM TO BE SOLVED: To make a mounting work of EGR branch pipes easy by mounting the EGR branch pipes to an intake manifold via heat insulating material 14 and by locating the tip portions of the EGR branch pipes in the intake manifold. SOLUTION: An intake manifold 2 is formed of a synthetic resin and the downstream side of the EGR main pipe 10 of an EGR circulating means 8 is branched such that it agrees with the number of branches of the intake manifold 2 to form EGR branch pipes 12-1 to 12-4. These EGR branch pipes 12-1 to 12-4 are mounted to the intake manifold 2 via heat insulating material 14 such that the tip portions of the EGR branch pipes 12-1 to 12-4 is located in the intake manifold 2, which can make a mounting work of the EGR branch pipes 12-1 to 12-4 easy.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】この発明は内燃機関の吸気装
置に係り、特にＥＧＲメインパイプによって排気ガスの
一部が還流される際に、ＥＧＲメインパイプからＥＧＲ
分岐パイプに分配されて吸気マニホルド内に還流され、
合成樹脂製の吸気マニホルドに対して、ＥＧＲ分岐パイ
プに排気ガスを確実に分配するとともに、ＥＧＲ分岐パ
イプの先端部位を吸気マニホルド内に位置させ、ＥＧＲ
分岐パイプの取付作業を容易とし、取付性を向上し得る
内燃機関の吸気装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake system for an internal combustion engine, and more particularly, when a part of exhaust gas is recirculated by an EGR main pipe, the EGR main pipe causes the EGR to flow out of the EGR main pipe.
It is distributed to the branch pipe and returned to the intake manifold,
Exhaust gas is reliably distributed to the EGR branch pipe with respect to the intake manifold made of synthetic resin, and the tip end portion of the EGR branch pipe is positioned in the intake manifold.
The present invention relates to an intake device for an internal combustion engine that facilitates the work of installing a branch pipe and can improve the installability.

【０００２】[0002]

【従来の技術】内燃機関は、シリンダヘッドと、このシ
リンダヘッド下面に装着されるシリンダブロックと、シ
リンダヘッド上面に装着されるシリンダヘッドカバー
と、シリンダブロック下面に装着されるオイルパンとを
有している。前記シリンダヘッドには吸気ポートが形成
されており、この吸気ポートは吸気通路の一部を構成し
ている。2. Description of the Related Art An internal combustion engine has a cylinder head, a cylinder block mounted on the lower surface of the cylinder head, a cylinder head cover mounted on the upper surface of the cylinder head, and an oil pan mounted on the lower surface of the cylinder block. There is. An intake port is formed in the cylinder head, and the intake port constitutes a part of the intake passage.

【０００３】つまり、吸気通路は、吸気管内に形成され
る吸気管通路と、吸気マニホルド内に形成される吸気マ
ニホルド通路と、シリンダヘッド内に形成される吸気ポ
ートとからなる。That is, the intake passage is composed of an intake pipe passage formed in the intake pipe, an intake manifold passage formed in the intake manifold, and an intake port formed in the cylinder head.

【０００４】前記内燃機関の吸気装置としては、実公平
４−５７２０号公報に開示されるものがある。この公報
に開示されるエンジンの吸気装置は、合成樹脂製の吸気
通路と、吸気通路内に一端を開口した排気ガス還流通路
と、排気ガス還流通路の開口部と略対向して吸気通路に
配設したアスベストや低熱伝導率金属等の断熱部材を備
え、樹脂製吸気通路の熱変形を防止している。As an intake device for the internal combustion engine, there is one disclosed in Japanese Utility Model Publication No. 4-5720. The engine air intake device disclosed in this publication has an intake passage made of synthetic resin, an exhaust gas recirculation passage whose one end is opened in the intake passage, and an exhaust gas recirculation passage substantially opposed to the opening of the exhaust gas recirculation passage. A heat insulating member such as asbestos or low thermal conductivity metal is installed to prevent thermal deformation of the resin intake passage.

【０００５】[0005]

【発明が解決しようとする課題】ところで、従来の内燃
機関の吸気装置において、吸気マニホルドをアルミ等の
耐熱性の高い材料によって形成する場合には、図５に示
す如く、シリンダヘッド１００と吸気マニホルド１０２
とに夫々ＥＧＲポート１５２、１５４を設け、これらの
ＥＧＲポート１５２、１５４をガスケット１５６を介し
て対向連通させ、吸気マニホルド１０２内の吸気マニホ
ルド通路１０６に連絡させている。By the way, in the conventional intake device for an internal combustion engine, when the intake manifold is made of a material having high heat resistance such as aluminum, as shown in FIG. 5, the cylinder head 100 and the intake manifold are connected. 102
And EGR ports 152 and 154 are provided respectively, and these EGR ports 152 and 154 are made to communicate with each other via a gasket 156 so as to communicate with the intake manifold passage 106 in the intake manifold 102.

【０００６】このとき、前記吸気マニホルド１０２は、
アルミ等の耐熱性の高い材料により鋳造にて形成されて
おり、前記吸気マニホルド通路１０６とＥＧＲポート１
５４とは一体的に形成される。At this time, the intake manifold 102 is
The intake manifold passage 106 and the EGR port 1 are formed by casting of a material having high heat resistance such as aluminum.
54 is integrally formed.

【０００７】近年、環境保全の観点から、自動車の軽量
化が叫ばれており、合成樹脂製の吸気マニホルドも軽量
化の有力な方策となり、一部の車種では採用されている
ものもある。[0007] In recent years, from the viewpoint of environmental protection, there has been a demand for weight reduction of automobiles, and an intake manifold made of synthetic resin is also an effective measure for weight reduction, and some vehicle types have adopted it.

【０００８】そして、合成樹脂にて吸気マニホルドを形
成した場合には、還流される排気ガスの温度が２００〜
３００度となっているので、熱害、つまり排気熱による
吸気マニホルドの変形や接続部位のシール性の点で、吸
気マニホルド通路とＥＧＲポートとを一体化することは
困難であり、図６に示す如く、吸気マニホルド２０２の
ＥＧＲ通路２０４の還流開口部位にアスベストや低熱伝
導率金属等からなる断熱部材２０６を配設するものがあ
る。When the intake manifold is made of synthetic resin, the temperature of the exhaust gas recirculated is 200 to
Since the temperature is 300 degrees, it is difficult to integrate the intake manifold passage and the EGR port in terms of heat damage, that is, deformation of the intake manifold due to exhaust heat and sealing of the connection portion, and it is shown in FIG. As described above, there is one in which the heat insulating member 206 made of asbestos, a metal having a low thermal conductivity, or the like is disposed at the recirculation opening portion of the EGR passage 204 of the intake manifold 202.

【０００９】また、図７に示す如く、吸気マニホルド３
０２において、対向距離の大なるサージタンク３０４に
ＥＧＲ通路３０６を配設するものもある。Further, as shown in FIG. 7, the intake manifold 3
No. 02, the EGR passage 306 is provided in the surge tank 304 having a large facing distance.

【００１０】しかし、合成樹脂にて吸気マニホルドを形
成した従来技術のものにおいては、ＥＧＲ通路の先端部
位が吸気マニホルド内に位置しておらず、ＥＧＲ通路の
取付作業が困難となり、取付性が悪いという不都合があ
る。However, in the conventional art in which the intake manifold is made of synthetic resin, the tip portion of the EGR passage is not located in the intake manifold, and the EGR passage installation work becomes difficult, resulting in poor installation performance. There is an inconvenience.

【００１１】また、前記ＥＧＲ通路の先端の開口部位に
カーボン等の堆積物が付着し易く、ＥＧＲ通路の目詰ま
りが惹起されるとともに、還流させる排気ガスの流入性
が悪く、しかもＥＧＲ通路によって還流される排気ガス
が吸気マニホルド内壁に指向しており、十分に熱害を回
避し得るとは言い得ないという不都合がある。Further, deposits such as carbon are likely to adhere to the opening portion at the tip of the EGR passage, which causes clogging of the EGR passage, and the inflowability of the exhaust gas to be recirculated is poor. The exhaust gas directed is directed toward the inner wall of the intake manifold, and there is the inconvenience that it cannot be said that heat damage can be sufficiently avoided.

【００１２】[0012]

【課題を解決するための手段】そこで、この発明は、上
述不都合を除去するために、内燃機関のシリンダヘッド
に形成される吸気ポートに連絡し燃焼室に吸気を供給す
る吸気マニホルドを有するとともに前記内燃機関から排
出される排気ガスの一部を吸気系に還流させるＥＧＲ還
流手段を有する内燃機関の吸気装置において、前記吸気
マニホルドを合成樹脂製材料により形成し、前記ＥＧＲ
還流手段のＥＧＲメインパイプの下流側を吸気マニホル
ドの分岐数に合致すべく分岐させてＥＧＲ分岐パイプを
形成し、このＥＧＲ分岐パイプを前記吸気マニホルドに
装着する際には断熱材を介して装着するとともに前記Ｅ
ＧＲ分岐パイプの先端部位を吸気マニホルド内に位置さ
せる構成としたことを特徴とする。In order to eliminate the above-mentioned inconvenience, the present invention has an intake manifold which communicates with an intake port formed in a cylinder head of an internal combustion engine and supplies intake air to a combustion chamber. In an intake system for an internal combustion engine having EGR recirculation means for recirculating a part of exhaust gas discharged from the internal combustion engine to an intake system, the intake manifold is made of a synthetic resin material,
An EGR branch pipe is formed by branching the downstream side of the EGR main pipe of the recirculation means so as to match the number of branches of the intake manifold, and when this EGR branch pipe is mounted on the intake manifold, it is mounted via a heat insulating material. With E
It is characterized in that the tip portion of the GR branch pipe is located in the intake manifold.

【００１３】[0013]

【発明の実施の形態】上述の如く発明したことにより、
ＥＧＲメインパイプによって排気ガスの一部が還流され
る際には、ＥＧＲメインパイプからＥＧＲ分岐パイプに
分配されて吸気マニホルド内に還流され、合成樹脂製の
吸気マニホルドに対して、ＥＧＲ分岐パイプに排気ガス
を確実に分配するとともに、ＥＧＲ分岐パイプの先端部
位を吸気マニホルド内に位置させ、ＥＧＲ分岐パイプの
取付作業を容易とし、取付性を向上させている。BEST MODE FOR CARRYING OUT THE INVENTION
When a part of the exhaust gas is recirculated by the EGR main pipe, it is distributed from the EGR main pipe to the EGR branch pipe and is recirculated into the intake manifold, and is exhausted to the EGR branch pipe with respect to the synthetic resin intake manifold. The gas is surely distributed, and the tip portion of the EGR branch pipe is located inside the intake manifold to facilitate the work of mounting the EGR branch pipe and improve the mountability.

【００１４】[0014]

【実施例】以下図面に基づいてこの発明の実施例を詳細
に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

【００１５】図１及び図２はこの発明の実施例を示すも
のである。図１及び図２において、２は図示しない内燃
機関に接続される吸気マニホルド、４はサージタンク、
６は吸気マニホルド通路である。1 and 2 show an embodiment of the present invention. 1 and 2, 2 is an intake manifold connected to an internal combustion engine (not shown), 4 is a surge tank,
Reference numeral 6 is an intake manifold passage.

【００１６】前記吸気マニホルド２は、図示しない内燃
機関のシリンダヘッド（図示せず）に接続され、吸気マ
ニホルド２と図示しない吸気ポートとを介して吸気を燃
焼室（図示せず）に供給している。The intake manifold 2 is connected to a cylinder head (not shown) of an internal combustion engine (not shown), and supplies intake air to a combustion chamber (not shown) via the intake manifold 2 and an intake port (not shown). There is.

【００１７】また、前記内燃機関から排出される排気ガ
スの一部を吸気系に還流させるＥＧＲ還流手段８を設け
る。EGR recirculation means 8 for recirculating a part of the exhaust gas discharged from the internal combustion engine to the intake system is provided.

【００１８】そして、前記吸気マニホルド２を合成樹脂
製材料により形成し、前記ＥＧＲ還流手段８のＥＧＲメ
インパイプ１０の下流側を吸気マニホルド２の分岐数に
合致すべく分岐させてＥＧＲ分岐パイプ１２を形成し、
このＥＧＲ分岐パイプ１２を前記吸気マニホルド２に装
着する際には断熱材１４を介して装着するとともに前記
ＥＧＲ分岐パイプ１２の先端１２ａ部位を吸気マニホル
ド２内に位置させる構成とする。Then, the intake manifold 2 is formed of a synthetic resin material, and the EGR main pipe 10 downstream of the EGR recirculation means 8 is branched so as to match the branch number of the intake manifold 2 to form the EGR branch pipe 12. Formed,
When the EGR branch pipe 12 is attached to the intake manifold 2, the EGR branch pipe 12 is attached via a heat insulating material 14 and the tip 12a of the EGR branch pipe 12 is located inside the intake manifold 2.

【００１９】詳述すれば、前記ＥＧＲ還流手段８は、図
示しない内燃機関の排気系に一端が連絡するＥＧＲメイ
ンパイプ１０と、このＥＧＲメインパイプ１０の他端を
吸気マニホルド２の分岐数、例えば４つに合致すべく分
岐させた第１〜第４ＥＧＲ分岐パイプ１２−１、１２−
２、１２−３、１２−４とを有する。More specifically, the EGR recirculation means 8 has an EGR main pipe 10 of which one end communicates with an exhaust system of an internal combustion engine (not shown), and the other end of the EGR main pipe 10 has the number of branches of the intake manifold 2, for example, First to fourth EGR branch pipes 12-1 and 12- branched to match the four pipes
2, 12-3, 12-4.

【００２０】また、ＥＧＲメインパイプ１０と第１〜第
４ＥＧＲ分岐パイプ１２−１、１２−２、１２−３、１
２−４間に接合されるシールフランジ１６を設け、ＥＧ
Ｒ分岐パイプ１２を前記吸気マニホルド２に装着する際
に、シールフランジ１６と吸気マニホルド２の取付部１
８間にガスケット、つまりヒートインシュレータである
断熱材１４を介設する。Further, the EGR main pipe 10 and the first to fourth EGR branch pipes 12-1, 12-2, 12-3, 1
The seal flange 16 joined between 2-4 is provided, and EG
When the R branch pipe 12 is attached to the intake manifold 2, the seal flange 16 and the attachment portion 1 of the intake manifold 2 are attached.
A gasket, that is, a heat insulator 14 which is a heat insulator is interposed between the eight.

【００２１】そして、前記吸気マニホルド２には、ＥＧ
Ｒ分岐パイプ１２の装着部位において内面側から外面側
に向かって漸次小となる断面テーパ状の空間部２０を形
成する。The intake manifold 2 has an EG
A space 20 having a tapered cross-section is formed in the mounting portion of the R branch pipe 12 from the inner surface side toward the outer surface side.

【００２２】つまり、吸気マニホルド２の取付部１８
を、図１及び図２に示す如く、吸気マニホルド２から外
側方向に少許突出すべく形成し、この取付部１８内部の
空間部２０を、溶融中子（図示せず）によって内面側か
ら外面側に向かって漸次小となる断面テーパ状に形成す
るものである。That is, the mounting portion 18 of the intake manifold 2
As shown in FIGS. 1 and 2, it is formed so as to slightly project outward from the intake manifold 2, and the space portion 20 inside the mounting portion 18 is formed from the inner surface side to the outer surface side by a melting core (not shown). The taper is formed in a tapered shape in cross section that gradually decreases toward.

【００２３】更に、前記ＥＧＲ分岐パイプ１２には、先
端１２ａ部位が吸気マニホルド２内に位置する際に、吸
気系の下流側に指向すべく前記先端１２ａ部位を屈曲形
成する。Further, the EGR branch pipe 12 is formed by bending the tip 12a so as to direct it toward the downstream side of the intake system when the tip 12a is located inside the intake manifold 2.

【００２４】次に作用について説明する。Next, the operation will be described.

【００２５】前記ＥＧＲメインパイプ１０によって排気
ガスの一部が還流されると、ＥＧＲメインパイプ１０か
らＥＧＲ分岐パイプ１２、つまり第１〜第４ＥＧＲ分岐
パイプ１２−１、１２−２、１２−３、１２−４に夫々
分配され、吸気マニホルド２内に還流される。When part of the exhaust gas is recirculated by the EGR main pipe 10, the EGR main pipe 10 to the EGR branch pipe 12, that is, the first to fourth EGR branch pipes 12-1, 12-2, 12-3 ,. 12-4, respectively, and are returned to the intake manifold 2.

【００２６】このとき、吸気マニホルド２内に還流され
る排気ガスは、ＥＧＲ分岐パイプ１２の先端１２ａが吸
気系の下流側に指向すべく屈曲形成されており、排気ガ
スが吸気マニホルド２の内壁部位に直接当たることがな
い。At this time, the exhaust gas recirculated into the intake manifold 2 is bent and formed so that the tip 12a of the EGR branch pipe 12 is directed toward the downstream side of the intake system, and the exhaust gas is an inner wall portion of the intake manifold 2. Never hit directly.

【００２７】また、ＥＧＲメインパイプ１０からＥＧＲ
分岐パイプ１２に伝達された排気熱は、ＥＧＲ分岐パイ
プ１２からの受熱面積は小であるが、シールフランジ１
６に伝達され、フランジ温度が約２００度程度となる。From the EGR main pipe 10 to the EGR
The exhaust heat transferred to the branch pipe 12 has a small heat receiving area from the EGR branch pipe 12, but the seal flange 1
6 and the flange temperature becomes about 200 degrees.

【００２８】そしてこのとき、シールフランジ１６から
吸気マニホルド２に伝達される排気熱は、ガスケットを
兼ねる断熱材１４によって抑制され、約１２０度まで低
下される。At this time, the exhaust heat transmitted from the seal flange 16 to the intake manifold 2 is suppressed by the heat insulating material 14 which also serves as a gasket, and is reduced to about 120 degrees.

【００２９】これにより、合成樹脂製の吸気マニホルド
２に対して、ＥＧＲ分岐パイプ１２、つまり各第１〜第
４ＥＧＲ分岐パイプ１２−１、１２−２、１２−３、１
２−４に排気ガスを確実に分配でき、実用上有利であ
る。As a result, with respect to the intake manifold 2 made of synthetic resin, the EGR branch pipe 12, that is, each of the first to fourth EGR branch pipes 12-1, 12-2, 12-3, 1 is provided.
The exhaust gas can be reliably distributed to 2-4, which is practically advantageous.

【００３０】また、ＥＧＲ分岐パイプ１２の先端１２ａ
部位を吸気マニホルド２内に位置させる挿入方式とした
ことにより、ＥＧＲ分岐パイプ１２の取付作業が容易と
なり、取付性を向上し得る。Further, the tip 12a of the EGR branch pipe 12
By adopting the insertion method in which the portion is located inside the intake manifold 2, the work of attaching the EGR branch pipe 12 is facilitated and the attachability can be improved.

【００３１】更に、前記ＥＧＲ分岐パイプ１２を吸気マ
ニホルド２に装着する際に、断熱材１４を介して装着す
ることにより、ＥＧＲ分岐パイプ１２から吸気マニホル
ド２に伝達され排気熱を低下させることができ、合成樹
脂製の吸気マニホルド２の変形を確実に防止し得るもの
である。Further, when the EGR branch pipe 12 is mounted on the intake manifold 2, it is mounted via the heat insulating material 14 so that the exhaust heat transferred from the EGR branch pipe 12 to the intake manifold 2 can be reduced. The deformation of the intake manifold 2 made of synthetic resin can be reliably prevented.

【００３２】更にまた、前記吸気マニホルド２には、Ｅ
ＧＲ分岐パイプ１２の装着部位において内面側から外面
側に向かって漸次小となる断面テーパ状の空間部２０を
形成したことにより、空間部２０によってＥＧＲ分岐パ
イプ１２の挿入が容易であるとともに、ＥＧＲ分岐パイ
プ１２と吸気マニホルド２との接触を確実に回避し得
る。Furthermore, the intake manifold 2 has an E
By forming the space portion 20 having a tapered cross-section that gradually decreases from the inner surface side to the outer surface side at the mounting portion of the GR branch pipe 12, the space portion 20 facilitates the insertion of the EGR branch pipe 12 and also the EGR. Contact between the branch pipe 12 and the intake manifold 2 can be reliably avoided.

【００３３】また、前記ＥＧＲ分岐パイプ１２に、先端
１２ａ部位が吸気マニホルド２内に位置する際に、吸気
系の下流側に指向すべく前記先端１２ａ部位を屈曲形成
したことにより、先端１２ａの開口部位にカーボン等の
堆積物が付着し難く、ＥＧＲ分岐パイプ１２の目詰まり
を防止し得るとともに、還流させる排気ガスの流入性を
良好とすることができ、しかもＥＧＲ分岐パイプ１２に
よって還流される排気ガスが吸気マニホルド２内壁に指
向しておらず、熱害を回避し得るものである。Further, when the tip 12a portion is located in the intake manifold 2 in the EGR branch pipe 12, the tip 12a portion is bent so as to be directed to the downstream side of the intake system, so that the opening of the tip 12a is formed. Deposits such as carbon are less likely to adhere to the site, clogging of the EGR branch pipe 12 can be prevented, the inflowability of the exhaust gas to be recirculated can be improved, and the exhaust gas recirculated by the EGR branch pipe 12 can be improved. Since the gas is not directed to the inner wall of the intake manifold 2, heat damage can be avoided.

【００３４】図３はこの発明の第２実施例を示すもので
ある。この第２実施例において、上述第１実施例と同一
機能を果たす箇所には同一符号を付して説明する。FIG. 3 shows a second embodiment of the present invention. In the second embodiment, portions that perform the same functions as those in the first embodiment will be described with the same reference numerals.

【００３５】この第２実施例の特徴とするところは、吸
気マニホルド２の取付部１８にＥＧＲ分岐パイプ１２を
装着する際に、断熱材３２を多層に構成した点にある。The feature of the second embodiment is that the heat insulating material 32 is formed in multiple layers when the EGR branch pipe 12 is mounted on the mounting portion 18 of the intake manifold 2.

【００３６】すなわち、ＥＧＲ分岐パイプ１２を前記吸
気マニホルド２に装着する際に、シールフランジ１６と
吸気マニホルド２の取付部１８間には、第１ガスケット
３４と断熱部３６と第２ガスケット３８とを積層して形
成した断熱材３２を介設するものである。That is, when the EGR branch pipe 12 is attached to the intake manifold 2, the first gasket 34, the heat insulating portion 36, and the second gasket 38 are provided between the seal flange 16 and the attachment portion 18 of the intake manifold 2. The heat insulating material 32 formed by stacking is interposed.

【００３７】さすれば、前記ＥＧＲ分岐パイプ１２を吸
気マニホルド２に装着する際に、多層の断熱材３２を介
して装着することにより、ＥＧＲ分岐パイプ１２から吸
気マニホルド２に伝達され排気熱をより一層低下させる
ことができ、合成樹脂製の吸気マニホルド２の変形を確
実に防止し得る。By the way, when the EGR branch pipe 12 is mounted on the intake manifold 2, the exhaust heat is transferred from the EGR branch pipe 12 to the intake manifold 2 by mounting via the multi-layered heat insulating material 32. It can be further lowered, and the deformation of the intake manifold 2 made of synthetic resin can be reliably prevented.

【００３８】図４はこの発明の第３実施例を示すもので
ある。FIG. 4 shows a third embodiment of the present invention.

【００３９】上述第１実施例においては、内燃機関から
排出される排気ガスの一部を、ＥＧＲ還流手段８によっ
て吸気系に還流させるために、吸気マニホルド２にＥＧ
Ｒメインパイプ１０下流側のＥＧＲ分岐パイプ１２を装
着する構成としたが、この第３実施例の特徴とするとこ
ろは、内燃機関から排出される排気ガスの一部を、吸気
系の吸気マニホルド２のサージタンク４に還流させる構
成とした点にある。In the first embodiment described above, in order to recirculate a part of the exhaust gas discharged from the internal combustion engine to the intake system by the EGR recirculation means 8, the EG is introduced into the intake manifold 2.
Although the EGR branch pipe 12 on the downstream side of the R main pipe 10 is mounted, the feature of the third embodiment lies in that a part of the exhaust gas discharged from the internal combustion engine is supplied to the intake manifold 2 of the intake system. It is configured to be returned to the surge tank 4 of.

【００４０】すなわち、図４に示す如く、ＥＧＲメイン
パイプ１０にシールフランジ１６を装着し、このシール
フランジ１６とサージタンク４の取付部４２間にガスケ
ット、つまりヒートインシュレータである断熱材４４を
介設する。That is, as shown in FIG. 4, a seal flange 16 is attached to the EGR main pipe 10, and a gasket, that is, a heat insulating material 44 as a heat insulator is interposed between the seal flange 16 and the mounting portion 42 of the surge tank 4. To do.

【００４１】このとき、ＥＧＲメインパイプ１０の下流
側は分岐されておらず、ＥＧＲ分岐パイプ１２が不要と
なり、サージタンク４４に排気ガスが集中して流入され
ることとなる。At this time, the downstream side of the EGR main pipe 10 is not branched, the EGR branch pipe 12 is not required, and the exhaust gas is concentrated and flows into the surge tank 44.

【００４２】さすれば、ＥＧＲ分岐パイプや大型の断熱
材が不要となり、構成が簡略化し、製作が容易となり、
コストを低廉とし得て、経済的に有利である。By doing so, an EGR branch pipe and a large heat insulating material are not required, the structure is simplified, and the manufacturing is facilitated.
The cost can be reduced, which is economically advantageous.

【００４３】[0043]

【発明の効果】以上詳細に説明した如くこの発明によれ
ば、内燃機関のシリンダヘッドに形成される吸気ポート
に連絡し燃焼室に吸気を供給する吸気マニホルドを有す
るとともに内燃機関から排出される排気ガスの一部を吸
気系に還流させるＥＧＲ還流手段を有する内燃機関の吸
気装置において、吸気マニホルドを合成樹脂製材料によ
り形成し、ＥＧＲ還流手段のＥＧＲメインパイプの下流
側を吸気マニホルドの分岐数に合致すべく分岐させてＥ
ＧＲ分岐パイプを形成し、ＥＧＲ分岐パイプを吸気マニ
ホルドに装着する際に断熱材を介して装着するとともに
ＥＧＲ分岐パイプの先端部位を吸気マニホルド内に位置
させる構成としたので、合成樹脂製の吸気マニホルドに
対して、ＥＧＲ分岐パイプに排気ガスを確実に分配で
き、実用上有利であるとともに、ＥＧＲ分岐パイプの先
端部位を吸気マニホルド２内に位置させる挿入方式と
し、ＥＧＲ分岐パイプの取付作業が容易となり、取付性
を向上させ得る。また、前記ＥＧＲ分岐パイプを吸気マ
ニホルドに装着する際に、断熱材を介して装着すること
により、ＥＧＲ分岐パイプから吸気マニホルドに伝達さ
れ排気熱を低下させることができ、合成樹脂製の吸気マ
ニホルドの変形を確実に防止し得る。As described in detail above, according to the present invention, the exhaust gas discharged from the internal combustion engine has an intake manifold connected to the intake port formed in the cylinder head of the internal combustion engine to supply intake air to the combustion chamber. In an intake system of an internal combustion engine having an EGR recirculation means for recirculating a part of gas to an intake system, an intake manifold is made of a synthetic resin material, and a downstream side of an EGR main pipe of the EGR recirculation means is set to a branch number of the intake manifold. E to branch to match
Since the GR branch pipe is formed and the EGR branch pipe is attached to the intake manifold via a heat insulating material and the tip portion of the EGR branch pipe is located in the intake manifold, the intake manifold made of a synthetic resin is used. On the other hand, the exhaust gas can be surely distributed to the EGR branch pipe, which is practically advantageous, and the insertion method in which the tip portion of the EGR branch pipe is located in the intake manifold 2 is adopted, which facilitates the mounting work of the EGR branch pipe. , The mountability can be improved. Further, when the EGR branch pipe is attached to the intake manifold, by attaching it via a heat insulating material, the exhaust heat transmitted from the EGR branch pipe to the intake manifold can be reduced, and the intake manifold made of synthetic resin can be reduced. Deformation can be reliably prevented.

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

【図１】この発明の第１実施例を示すＥＧＲメインパイ
プ取付部位の概略断面図である。FIG. 1 is a schematic sectional view of an EGR main pipe mounting portion showing a first embodiment of the present invention.

【図２】内燃機関の吸気装置の吸気マニホルドの概略斜
視図である。FIG. 2 is a schematic perspective view of an intake manifold of an intake system for an internal combustion engine.

【図３】この発明の第２実施例を示すＥＧＲメインパイ
プ取付部位の概略断面図である。FIG. 3 is a schematic sectional view of an EGR main pipe mounting portion showing a second embodiment of the present invention.

【図４】この発明の第３実施例を示すＥＧＲメインパイ
プ取付部位の概略断面図である。FIG. 4 is a schematic sectional view of an EGR main pipe attachment portion showing a third embodiment of the present invention.

【図５】この発明の第１の従来技術を示すＥＧＲポート
形成部位の概略拡大断面図である。FIG. 5 is a schematic enlarged cross-sectional view of an EGR port forming portion showing a first conventional technique of the present invention.

【図６】この発明の第２の従来技術を示す内燃機関の吸
気装置の吸気マニホルドの概略断面図である。FIG. 6 is a schematic sectional view of an intake manifold of an intake system for an internal combustion engine showing a second conventional technique of the present invention.

【図７】この発明の第３の従来技術を示す内燃機関の吸
気装置の吸気マニホルドの概略断面図である。FIG. 7 is a schematic sectional view of an intake manifold of an intake system for an internal combustion engine showing a third conventional technique of the present invention.

【符号の説明】[Explanation of symbols]

２ 吸気マニホルド ４ サージタンク ６ 吸気マニホルド通路 ８ ＥＧＲ還流手段 １０ ＥＧＲメインパイプ １２ ＥＧＲ分岐パイプ １２ａ 先端 １２−１ 第１ＥＧＲ分岐パイプ １２−２ 第２ＥＧＲ分岐パイプ １２−３ 第３ＥＧＲ分岐パイプ １２−４ 第４ＥＧＲ分岐パイプ １４ 断熱材 １６ シールフランジ １８ 取付部 ２０ 空間部 2 intake manifold 4 surge tank 6 intake manifold passage 8 EGR recirculation means 10 EGR main pipe 12 EGR branch pipe 12a tip 12-1 first EGR branch pipe 12-2 second EGR branch pipe 12-3 third EGR branch pipe 12-4 fourth EGR Branch pipe 14 Heat insulating material 16 Seal flange 18 Mounting part 20 Space part

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 内燃機関のシリンダヘッドに形成される
吸気ポートに連絡し燃焼室に吸気を供給する吸気マニホ
ルドを有するとともに前記内燃機関から排出される排気
ガスの一部を吸気系に還流させるＥＧＲ還流手段を有す
る内燃機関の吸気装置において、前記吸気マニホルドを
合成樹脂製材料により形成し、前記ＥＧＲ還流手段のＥ
ＧＲメインパイプの下流側を吸気マニホルドの分岐数に
合致すべく分岐させてＥＧＲ分岐パイプを形成し、この
ＥＧＲ分岐パイプを前記吸気マニホルドに装着する際に
は断熱材を介して装着するとともに前記ＥＧＲ分岐パイ
プの先端部位を吸気マニホルド内に位置させる構成とし
たことを特徴とする内燃機関の吸気装置。1. An EGR which has an intake manifold which communicates with an intake port formed in a cylinder head of an internal combustion engine and supplies intake air to a combustion chamber, and which recirculates a part of exhaust gas discharged from the internal combustion engine to an intake system. In an intake system for an internal combustion engine having a recirculation means, the intake manifold is made of a synthetic resin material, and E of the EGR recirculation means is formed.
The EGR branch pipe is formed by branching the downstream side of the GR main pipe so as to match the number of branches of the intake manifold, and when the EGR branch pipe is attached to the intake manifold, the EGR branch pipe is attached via a heat insulating material and the EGR branch pipe is attached. An intake system for an internal combustion engine, characterized in that a tip portion of a branch pipe is located inside an intake manifold. 【請求項２】 前記吸気マニホルドは、ＥＧＲ分岐パイ
プの装着部位において内面側から外面側に向かって漸次
小となる断面テーパ状の空間部を有する吸気マニホルド
である特許請求の範囲の請求項１に記載の内燃機関の吸
気装置。2. The intake manifold according to claim 1, wherein the intake manifold has a space portion having a tapered cross-section that gradually decreases from an inner surface side to an outer surface side at a mounting portion of an EGR branch pipe. An intake system for an internal combustion engine as described. 【請求項３】 前記ＥＧＲ分岐パイプは、先端部位が吸
気マニホルド内に位置する際に、吸気系の下流側に指向
すべく前記先端部位を屈曲形成したＥＧＲ分岐パイプで
ある特許請求の範囲の請求項１に記載の内燃機関の吸気
装置。3. The EGR branch pipe is an EGR branch pipe in which the tip end portion is bent so as to be directed to the downstream side of the intake system when the tip end portion is located in the intake manifold. Item 1. An intake device for an internal combustion engine according to item 1.
JP8161000A 1996-05-31 1996-05-31 Intake device for internal combustion engine Pending JPH09317579A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8161000A JPH09317579A (en) 1996-05-31 1996-05-31 Intake device for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8161000A JPH09317579A (en) 1996-05-31 1996-05-31 Intake device for internal combustion engine

Publications (1)

Publication Number Publication Date
JPH09317579A true JPH09317579A (en) 1997-12-09

Family

ID=15726675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8161000A Pending JPH09317579A (en) 1996-05-31 1996-05-31 Intake device for internal combustion engine

Country Status (1)

Country Link
JP (1) JPH09317579A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999034110A1 (en) * 1997-12-24 1999-07-08 Filterwerk Mann+Hummel Gmbh Suction device for an internal combustion engine
JP2001241367A (en) * 2000-02-02 2001-09-07 Filterwerk Mann & Hummel Gmbh Suction pipe having guide for returning integrated exhaust gas
JP2009209855A (en) * 2008-03-05 2009-09-17 Toyota Motor Corp Gas introduction structure of intake passage and intake manifold
JP2009243344A (en) * 2008-03-31 2009-10-22 Daihatsu Motor Co Ltd Exhaust gas reflux device in internal combustion engine
CN101832201A (en) * 2010-04-29 2010-09-15 重庆长安汽车股份有限公司 Connection structure of engine exhaust gas reclrculation pipe and plastic intake manifold
JP2011111991A (en) * 2009-11-27 2011-06-09 Daihatsu Motor Co Ltd Exhaust gas recirculation device for internal combustion engine
JP2013147953A (en) * 2012-01-17 2013-08-01 Mazda Motor Corp Engine intake device
CN104712465A (en) * 2013-12-17 2015-06-17 现代自动车株式会社 Engine system having turbo charger
FR3022945A1 (en) * 2014-06-25 2016-01-01 Valeo Systemes Thermiques EXHAUST GAS RECIRCULATION SYSTEM.
DE102016003003A1 (en) 2016-03-11 2017-09-14 Mtu Friedrichshafen Gmbh Feed arrangement for the introduction of recirculated exhaust gas
JP2021046792A (en) * 2019-09-16 2021-03-25 愛三工業株式会社 EGR gas distributor

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999034110A1 (en) * 1997-12-24 1999-07-08 Filterwerk Mann+Hummel Gmbh Suction device for an internal combustion engine
JP2001241367A (en) * 2000-02-02 2001-09-07 Filterwerk Mann & Hummel Gmbh Suction pipe having guide for returning integrated exhaust gas
EP1122421A3 (en) * 2000-02-02 2002-06-12 Filterwerk Mann + Hummel Gmbh Intake conduit with integrated exhaust gas recirculation
US6422221B2 (en) 2000-02-02 2002-07-23 Filterwerk Mann & Hummel Gmbh Intake manifold with integrated exhaust gas recirculation system
JP2009209855A (en) * 2008-03-05 2009-09-17 Toyota Motor Corp Gas introduction structure of intake passage and intake manifold
JP2009243344A (en) * 2008-03-31 2009-10-22 Daihatsu Motor Co Ltd Exhaust gas reflux device in internal combustion engine
JP2011111991A (en) * 2009-11-27 2011-06-09 Daihatsu Motor Co Ltd Exhaust gas recirculation device for internal combustion engine
CN101832201A (en) * 2010-04-29 2010-09-15 重庆长安汽车股份有限公司 Connection structure of engine exhaust gas reclrculation pipe and plastic intake manifold
JP2013147953A (en) * 2012-01-17 2013-08-01 Mazda Motor Corp Engine intake device
CN104712465A (en) * 2013-12-17 2015-06-17 现代自动车株式会社 Engine system having turbo charger
CN104712465B (en) * 2013-12-17 2019-04-05 现代自动车株式会社 Engine system with turbocharger
DE102014107866B4 (en) 2013-12-17 2021-11-11 Hyundai Motor Company Turbocharged engine system
US9488134B2 (en) 2013-12-17 2016-11-08 Hyundai Motor Company Engine system having turbo charger
FR3022945A1 (en) * 2014-06-25 2016-01-01 Valeo Systemes Thermiques EXHAUST GAS RECIRCULATION SYSTEM.
EP2960482A3 (en) * 2014-06-25 2016-01-27 Valeo Systemes Thermiques Exhaust gas recirculation system
WO2017153042A1 (en) 2016-03-11 2017-09-14 Mtu Friedrichshafen Gmbh Feeding arrangement for introducing recirculated exhaust gas
DE102016003003B4 (en) * 2016-03-11 2017-10-12 Mtu Friedrichshafen Gmbh Feed arrangement for the introduction of recirculated exhaust gas
DE102016003003A1 (en) 2016-03-11 2017-09-14 Mtu Friedrichshafen Gmbh Feed arrangement for the introduction of recirculated exhaust gas
US10495034B2 (en) 2016-03-11 2019-12-03 Mtu Friedrichshafen Gmbh Feeding arrangement for introducing recirculated exhaust gas
JP2021046792A (en) * 2019-09-16 2021-03-25 愛三工業株式会社 EGR gas distributor

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