JP2004092443A - Egr cooler - Google Patents

Egr cooler Download PDF

Info

Publication number
JP2004092443A
JP2004092443A JP2002252229A JP2002252229A JP2004092443A JP 2004092443 A JP2004092443 A JP 2004092443A JP 2002252229 A JP2002252229 A JP 2002252229A JP 2002252229 A JP2002252229 A JP 2002252229A JP 2004092443 A JP2004092443 A JP 2004092443A
Authority
JP
Japan
Prior art keywords
shell
adapter
cylinder head
egr cooler
egr
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
JP2002252229A
Other languages
Japanese (ja)
Inventor
Koji Mano
真野　孝治
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.)
Hino Motors Ltd
Original Assignee
Hino Motors Ltd
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 Hino Motors Ltd filed Critical Hino Motors Ltd
Priority to JP2002252229A priority Critical patent/JP2004092443A/en
Publication of JP2004092443A publication Critical patent/JP2004092443A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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

<P>PROBLEM TO BE SOLVED: To surely mount even a shell of small board thickness with low rigidity to a cylinder head in a state in which an overhang amount is small. <P>SOLUTION: An adapter 7 holds the shell 6 constituting a body of this EGR cooler for cooling an EGR gas which flows back to an intake system. The adapter 7 is fixed directly to the cylinder head 1 of an engine. Accordingly, the overhang amount of the shell 6 with respect to the cylinder head 1 is reduced as much as possible, to prevent deformation of the EGR cooler accompanied with vibration of the engine. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は吸気系に還流される排気を冷却するＥＧＲクーラに係り、特に、エンジン振動によるＥＧＲクーラの変形などを回避することができるＥＧＲクーラに関するものである。
【０００２】
【従来の技術】
吸気系に還流されるＥＧＲガスを冷却するＥＧＲクーラとしては、ＥＧＲクーラの本体を構成するシェルと、該シェルを保持するアダプタで構成されており、前記シェルの内部に多数本のチューブを内蔵することにより、チューブの壁面を介してＥＧＲガスとエンジン冷却水などとの間で熱交換を行わせてＥＧＲガスを冷却するようにしたものがある。
【０００３】
このような従来のＥＧＲクーラにおいては、ＥＧＲガスの熱交換通路を内蔵したシェルに該シェルを保持するアダプタを設ける一方、エンジンのシリンダヘッドにブラケットを取り付け、このブラケットに前記アダプタを取り付けてシェルを保持させ、あるいは、シェル自体をＵボルトもしくはラバーなどを介してシリンダヘッドに取り付けていた。
【０００４】
しかしながら、前者のようにブラケットを介してシェルをシリンダヘッドに取り付けた場合は、シリンダヘッドに対するシェルのオーバハング量が大きくなるために、ＥＧＲクーラの振動が大きくなってしまうという不具合があった。一方、シェルは板厚が小さいために、後者のようにシェルをシリンダヘッドに直接取り付けた場合は、取付応力を受けて内部のチューブが変形し、あるいは、シェルそのものが変形する可能性が高くなってしまう。
【０００５】
【発明が解決しようとする課題】
本発明は上記実情に鑑みてなされたものであって、板厚が小さくて剛性が低いシェルであってもオーバハング量の小さい状態でシリンダヘッドに的確に取り付けることができるＥＧＲクーラを提供することを課題としている。
【０００６】
【課題を解決するための手段】
上記課題を解決するために本発明は、吸気系に還流されるＥＧＲガスを冷却するＥＧＲクーラの本体を構成するシェルを保持するアダプタを、シリンダヘッドに直付け固定したことを特徴としている。
【０００７】
【発明の実施の形態】
以下に本発明の実施形態を図に基づいて詳細に説明する。図１は本発明に係るＥＧＲクーラの一実施形態を示すエンジンへの取付状態を示す概略斜視図、図２はシェルおよびアダプタを示す概略斜視図である。
【０００８】
これらの図において、エンジンのシリンダヘッド１に取り付けたエキゾーストマニホールド２から取り出した排気をＥＧＲガスとして図示しないインテークマニホールドに還流させるＥＧＲ装置３は、エキゾーストマニホールド２に一端を接続した上流側パイプ４と、図示しないインテークマニホールドに一端を接続した下流側パイプ５と、両パイプ４、５を接続するシェル６を備えている。
【０００９】
シェル６は円筒状に形成されており、その内部に図示しない多数本の熱交換チューブを収容して排気の流路を形成している。そして、図示しない冷却水の出入口をシェル６に設けることにより、熱交換チューブの内側を通る排気と熱交換チューブの外側に循環供給されるエンジン冷却水の間で熱交換させることにより、エンジン冷却水との間の熱交換作用で温度低下させた排気をインテークマニホールドにＥＧＲガスとして供給するようにしているが、シェル６の構造およびＥＧＲガスの冷却形態は実施形態のものに限定されない。。
【００１０】
なお、ＥＧＲ装置３の適所に図示しない流量制御弁を設けることにより、エンジンの運転状態に応じてインテークマニホールドに還流されるＥＧＲガスの流量を最適制御するようにしている。
【００１１】
前記シェル６の両端部には、該シェル６を保持するアダプタ７を取り付けている。アダプタ７は、シェル６の外周面に沿って巻回させたベルト状の帯板によって形成されており、アダプタ７の一部に設けた突部８をシリンダヘッド１の側面に図示しないボルトで締付固定している。なお、シリンダヘッド１におけるアダプタ７の突部８の締付部分には必要に応じて取付座などを設けることにより、アダプタ７の取付安定性を確保しつつ、シェル６とシリンダヘッド１の干渉を回避すると同時にシリンダヘッド１からのシェル６のオーバハング量を十分に小さくしている。
【００１２】
なお、実施形態においてはシェル６の外周面に沿って巻回させたベルト状の帯板で構成したアダプタ７を用いることにより、シェル６の変形などの不具合をともなうことなくアダプタ７によるシェル６の保持安定性を高くするようにしているが、要するに薄板などで構成したシェル６をを安定かつ確実に保持するものであればアダプタ７の具体的な構造は任意であり、実施形態に示したベルト状のものに限定されない。
【００１３】
【発明の効果】
以上の説明から明らかなように本発明は、ＥＧＲクーラの本体を構成するシェルを保持するアダプタをシリンダヘッドに直付け固定したものであるから、ブラケットを介して取り付ける場合に対比してシリンダヘッドからのシェルのオーバハング量を可及的に小さくすることが可能であり、エンジンの振動にともなうＥＧＲクーラの振動を小さくしてＥＧＲクーラの変形などを回避することができる。
【図面の簡単な説明】
【図１】本発明に係るＥＧＲクーラの一実施形態を示すエンジンへの取付状態を示す概略斜視図である。
【図２】シェルおよびアダプタを示す概略斜視図である。
【符号の説明】
１　　シリンダヘッド
２　　エキゾーストマニホールド
３　　ＥＧＲ装置
４　　上流側パイプ
５　　下流側パイプ
６　　シェル
７　　アダプタ
８　　突部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an EGR cooler that cools exhaust gas recirculated to an intake system, and more particularly to an EGR cooler that can avoid deformation of the EGR cooler due to engine vibration.
[0002]
[Prior art]
The EGR cooler that cools the EGR gas that is recirculated to the intake system includes a shell that forms the main body of the EGR cooler, and an adapter that holds the shell, and incorporates a number of tubes inside the shell. In some cases, heat is exchanged between the EGR gas and engine coolant through the wall surface of the tube to cool the EGR gas.
[0003]
In such a conventional EGR cooler, an adapter for holding the shell is provided on a shell containing a heat exchange passage for EGR gas, while a bracket is attached to a cylinder head of an engine, and the adapter is attached to this bracket to attach the shell. The shell was held, or the shell itself was attached to the cylinder head via a U-bolt or rubber.
[0004]
However, when the shell is attached to the cylinder head via the bracket as in the former case, there is a problem that the amount of overhang of the shell with respect to the cylinder head becomes large, so that the vibration of the EGR cooler becomes large. On the other hand, since the shell has a small plate thickness, when the shell is directly mounted on the cylinder head as in the latter case, there is a high possibility that the inner tube will be deformed due to the mounting stress or the shell itself will be deformed. Would.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an EGR cooler that can be accurately attached to a cylinder head in a state where an overhang is small even in a shell having a small plate thickness and a low rigidity. It is an issue.
[0006]
[Means for Solving the Problems]
In order to solve the above problem, the present invention is characterized in that an adapter for holding a shell constituting a main body of an EGR cooler for cooling EGR gas recirculated to an intake system is directly fixed to a cylinder head.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic perspective view showing an EGR cooler according to an embodiment of the present invention, showing a state of attachment to an engine, and FIG. 2 is a schematic perspective view showing a shell and an adapter.
[0008]
In these figures, an EGR device 3 that recirculates exhaust gas taken out from an exhaust manifold 2 attached to a cylinder head 1 of an engine to an intake manifold (not shown) as an EGR gas includes an upstream pipe 4 having one end connected to the exhaust manifold 2, A downstream pipe 5 having one end connected to an intake manifold (not shown) and a shell 6 connecting both pipes 4 and 5 are provided.
[0009]
The shell 6 is formed in a cylindrical shape, and accommodates a number of heat exchange tubes (not shown) therein to form an exhaust passage. By providing a cooling water inlet / outlet (not shown) in the shell 6, heat is exchanged between exhaust gas passing through the inside of the heat exchange tube and engine cooling water circulated and supplied to the outside of the heat exchange tube. The exhaust gas whose temperature has been reduced by the heat exchange between the exhaust gas and the exhaust gas is supplied to the intake manifold as the EGR gas. However, the structure of the shell 6 and the cooling mode of the EGR gas are not limited to those of the embodiment. .
[0010]
By providing a flow control valve (not shown) at an appropriate position of the EGR device 3, the flow rate of the EGR gas recirculated to the intake manifold is optimally controlled according to the operating state of the engine.
[0011]
Adapters 7 for holding the shell 6 are attached to both ends of the shell 6. The adapter 7 is formed by a belt-shaped strip wound around the outer peripheral surface of the shell 6, and a protrusion 8 provided on a part of the adapter 7 is fastened to a side surface of the cylinder head 1 with a bolt (not shown). It is fixed. In addition, by providing a mounting seat or the like as necessary in a portion of the cylinder head 1 where the protrusion 8 of the adapter 7 is fastened, interference between the shell 6 and the cylinder head 1 can be ensured while securing the mounting stability of the adapter 7. At the same time, the amount of overhang of the shell 6 from the cylinder head 1 is sufficiently reduced.
[0012]
In the embodiment, the use of the adapter 7 formed of a belt-shaped strip wound around the outer peripheral surface of the shell 6 allows the shell 6 to be fixed by the adapter 7 without causing a problem such as deformation of the shell 6. Although the holding stability is increased, the specific structure of the adapter 7 is arbitrary as long as the shell 6 composed of a thin plate or the like is stably and reliably held. It is not limited to the shape.
[0013]
【The invention's effect】
As is apparent from the above description, according to the present invention, since the adapter holding the shell constituting the main body of the EGR cooler is fixed directly to the cylinder head, the adapter is not mounted on the cylinder head as compared with the case where the adapter is mounted via the bracket. It is possible to reduce the overhang amount of the shell as much as possible, and to reduce the vibration of the EGR cooler caused by the vibration of the engine to avoid deformation of the EGR cooler.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing an embodiment of an EGR cooler according to the present invention, showing an attached state to an engine.
FIG. 2 is a schematic perspective view showing a shell and an adapter.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylinder head 2 Exhaust manifold 3 EGR device 4 Upstream pipe 5 Downstream pipe 6 Shell 7 Adapter 8 Projection

Claims (1)

吸気系に還流されるＥＧＲガスを冷却するＥＧＲクーラにおいて、前記ＥＧＲクーラの本体を構成するシェルと、該シェルを保持するアダプタを備え、前記アダプタをシリンダヘッドに直付け固定したことを特徴とするＥＧＲクーラ。An EGR cooler for cooling EGR gas recirculated to an intake system, comprising: a shell constituting a main body of the EGR cooler; and an adapter for holding the shell, wherein the adapter is directly fixed to a cylinder head. EGR cooler.
JP2002252229A 2002-08-30 2002-08-30 Egr cooler Pending JP2004092443A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002252229A JP2004092443A (en) 2002-08-30 2002-08-30 Egr cooler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002252229A JP2004092443A (en) 2002-08-30 2002-08-30 Egr cooler

Publications (1)

Publication Number Publication Date
JP2004092443A true JP2004092443A (en) 2004-03-25

Family

ID=32058559

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002252229A Pending JP2004092443A (en) 2002-08-30 2002-08-30 Egr cooler

Country Status (1)

Country Link
JP (1) JP2004092443A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1846651A1 (en) * 2005-02-02 2007-10-24 Scania CV AB (publ) Arrangement for recirculation of exhaust gases of an internal combustion engine in a vehicle
DE102014211677A1 (en) 2013-06-27 2014-12-31 Suzuki Motor Corporation EXHAUST GAS RECYCLING SYSTEM FOR MOTOR VEHICLE ENGINES
JP2015161212A (en) * 2014-02-27 2015-09-07 株式会社デンソー Intake/exhaust system of internal combustion engine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1846651A1 (en) * 2005-02-02 2007-10-24 Scania CV AB (publ) Arrangement for recirculation of exhaust gases of an internal combustion engine in a vehicle
JP2008528877A (en) * 2005-02-02 2008-07-31 スカニア シーブイ アクチボラグ（パブル） Device for exhaust gas recirculation of an internal combustion engine in a vehicle
EP1846651A4 (en) * 2005-02-02 2012-05-30 Scania Cv Abp Arrangement for recirculation of exhaust gases of an internal combustion engine in a vehicle
DE102014211677A1 (en) 2013-06-27 2014-12-31 Suzuki Motor Corporation EXHAUST GAS RECYCLING SYSTEM FOR MOTOR VEHICLE ENGINES
JP2015010495A (en) * 2013-06-27 2015-01-19 スズキ株式会社 Exhaust gas recirculation device of vehicular engine
JP2015161212A (en) * 2014-02-27 2015-09-07 株式会社デンソー Intake/exhaust system of internal combustion engine

Similar Documents

Publication Publication Date Title
JP5719376B2 (en) EGR cooler structure
US8056545B2 (en) Integrated cover and exhaust gas recirculation cooler for internal combustion engine
JP6635747B2 (en) Integrated EGR cooler
JP2005307960A (en) Egr system
JP2007298037A (en) Exhaust system
WO2005008055A1 (en) Egr cooler
JP2012047154A (en) Internal combustion engine
JP2004092443A (en) Egr cooler
JP2000282960A (en) Egr-cooling device
US20160160812A1 (en) Integrated egr valve housing
JP2017008911A (en) Heat exchanger
JP3664457B2 (en) EGR gas cooling device
JP2001140636A (en) Exhaust emission control device
JP4248095B2 (en) EGR cooler
JP2001221106A (en) Circulated gas cooling system
JP2010060196A (en) Gas cooling device
JP4054441B2 (en) EGR device
JP2017031816A (en) Engine, and cleaning method of egr cooler of engine
JP4667468B2 (en) Configuration of air intake duct for internal combustion engine
US10125718B1 (en) Engine block including an integrated flow channel
JP2017180100A (en) EGR cooler structure
JPS641196Y2 (en)
JP2007291948A (en) Egr device of v-type engine
JP2004012105A (en) Egr cooler
JP2010053831A (en) Intake manifold

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20041004

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20061117

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20061128

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20070403