JPH1113556A - Egr gas cooling device - Google Patents
Egr gas cooling deviceInfo
- Publication number
- JPH1113556A JPH1113556A JP9168592A JP16859297A JPH1113556A JP H1113556 A JPH1113556 A JP H1113556A JP 9168592 A JP9168592 A JP 9168592A JP 16859297 A JP16859297 A JP 16859297A JP H1113556 A JPH1113556 A JP H1113556A
- Authority
- JP
- Japan
- Prior art keywords
- egr gas
- heat exchange
- cooling device
- cooling
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
- F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0012—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the apparatus having an annular form
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、排気系からＥＧＲ
管路を介して吸気マニホールドに再循環されるＥＧＲガ
スを冷却するためのＥＧＲガス冷却装置に関する。[0001] The present invention relates to an EGR system for an exhaust system.
The present invention relates to an EGR gas cooling device for cooling EGR gas recirculated to an intake manifold via a pipe.
【０００２】[0002]
【従来の技術】従来、エンジンでは、排気ガス中におけ
る窒素酸化物（ＮＯｘ）を低減させるために、排気ガス
の一部を排気系から取り出し、混合気に加えるＥＧＲ
（Exhaust Gas Recirculation：排気再循環）が行われ
ている。このようなＥＧＲを行うためのＥＧＲ装置は、
排気系からの排気ガスの一部をＥＧＲガスとして燃焼室
に吸入される混合気に再循環させるように構成されてお
り、例えば、図８に示すように、排気マニホールド（ま
たは排気管）１と吸気マニホールド２との間を接続する
ＥＧＲ通路３と、このＥＧＲ通路３に設けられたＥＧＲ
弁４とを備えている。2. Description of the Related Art Conventionally, in an engine, in order to reduce nitrogen oxides (NOx) in the exhaust gas, a part of the exhaust gas is taken out of an exhaust system and added to an air-fuel mixture.
(Exhaust Gas Recirculation). An EGR device for performing such EGR includes:
A part of the exhaust gas from the exhaust system is configured to be recirculated as an EGR gas to the air-fuel mixture sucked into the combustion chamber. For example, as shown in FIG. 8, an exhaust manifold (or an exhaust pipe) 1 An EGR passage 3 connecting the intake manifold 2 and an EGR passage provided in the EGR passage 3
And a valve 4.
【０００３】そして、ＥＧＲ弁４の開度をエンジンの運
転状態に応じて適宜に制御することにより、吸入混合気
に対するＥＧＲガスの割合が調整される。このようなＥ
ＧＲ装置では、ＥＧＲガスが混合気と共に燃焼室に取り
込まれるため、ＥＧＲガスの温度を適度な温度に維持す
る必要がある。すなわち、ＥＧＲガスは、本来高温であ
るが、このＥＧＲガスの温度が高すぎると、混合気が加
熱されて熱膨張することにより空気の充填効率が悪くな
り、混合気の燃焼率が悪化してエンジンの出力低下を招
く虞がある。[0003] The ratio of the EGR gas to the intake air-fuel mixture is adjusted by appropriately controlling the opening of the EGR valve 4 according to the operating state of the engine. Such an E
In the GR device, since the EGR gas is taken into the combustion chamber together with the air-fuel mixture, it is necessary to maintain the temperature of the EGR gas at an appropriate temperature. In other words, the EGR gas is naturally high in temperature, but if the temperature of the EGR gas is too high, the air-fuel mixture is heated and thermally expanded, so that the air charging efficiency is deteriorated and the combustion rate of the air-fuel mixture is deteriorated. The output of the engine may be reduced.
【０００４】一方、ＥＧＲガスの温度が低すぎると、Ｅ
ＧＲガス中のタール等の付着物質の粘度が増加して、付
着物質がＥＧＲ通路，ＥＧＲ弁等に付着し易くなり、装
置の信頼性を低下させる虞がある。従来、ＥＧＲガスを
冷却する冷却装置を備えたＥＧＲ装置として、例えば、
特開平７−１８０６２０号公報等に開示されるものが知
られている。On the other hand, if the temperature of the EGR gas is too low,
The viscosity of the adhering substance such as tar in the GR gas increases, so that the adhering substance easily adheres to the EGR passage, the EGR valve, and the like, which may reduce the reliability of the apparatus. Conventionally, as an EGR device provided with a cooling device for cooling EGR gas, for example,
Japanese Unexamined Patent Application Publication No. 7-180620 and the like are known.
【０００５】図９は、この種のＥＧＲ装置に配置される
冷却装置を示すもので、この冷却装置は、エンジンルー
ム内の排気マニホールドとＥＧＲ弁とを接続する管路に
配置されている。FIG. 9 shows a cooling device disposed in this type of EGR device. This cooling device is disposed in a pipe connecting an exhaust manifold and an EGR valve in an engine room.
【０００６】この冷却装置は、長尺状の外筒５の軸長方
向に、多数のパイプ６を配置して構成されており、図１
０に示すように、パイプ６の両端が端板７に支持されて
いる。外筒５の外周には、冷却水の入口パイプ８および
出口パイプ９が開口されている。また、外筒５の上端お
よび下端には、フランジ部１０，１１が形成されてい
る。This cooling device is configured by arranging a large number of pipes 6 in the axial direction of a long outer cylinder 5.
As shown at 0, both ends of the pipe 6 are supported by the end plate 7. An inlet pipe 8 and an outlet pipe 9 for the cooling water are opened on the outer periphery of the outer cylinder 5. Further, flange portions 10 and 11 are formed at the upper end and the lower end of the outer cylinder 5.
【０００７】上端のフランジ部１０には、排気マニホー
ルドからの配管１２が取付フランジ１３を介して連結さ
れ、下端のフランジ部１１には、ＥＧＲ弁への配管１４
が取付フランジ１５を介して連結されている。この冷却
装置では、排気マニホールド側の配管１２からＥＧＲガ
スがパイプ６内に導入され、外筒５内のパイプ６の間を
流れる冷却水により冷却された後、ＥＧＲ弁側の配管１
４に導出される。A pipe 12 from the exhaust manifold is connected to the upper flange 10 via a mounting flange 13, and a pipe 14 to the EGR valve is connected to the lower flange 11.
Are connected via a mounting flange 15. In this cooling device, the EGR gas is introduced into the pipe 6 from the pipe 12 on the exhaust manifold side, and is cooled by cooling water flowing between the pipes 6 in the outer cylinder 5.
4 is derived.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、このよ
うな従来のＥＧＲガス冷却装置では、長尺状の外筒５内
にパイプ６を配置し、ＥＧＲガスをこのパイプ６を介し
て熱交換しているため、所望の熱交換効率を得るために
は、長いパイプ６を用いてパイプ６の伝熱面積を大きく
する必要があり、この結果、外筒５の長さが長くなり、
エンジンルーム内へのレイアウトの自由度が低下すると
いう問題があった。However, in such a conventional EGR gas cooling device, a pipe 6 is arranged in a long outer cylinder 5 and heat is exchanged through the EGR gas through the pipe 6. Therefore, in order to obtain a desired heat exchange efficiency, it is necessary to use a long pipe 6 to increase the heat transfer area of the pipe 6, and as a result, the length of the outer cylinder 5 increases,
There was a problem that the degree of freedom in layout in the engine room was reduced.
【０００９】本発明は、かかる従来の問題を解決するた
めになされたもので、エンジンルーム内へのレイアウト
の自由度を従来に比べ大幅に向上することができる小型
のＥＧＲガス冷却装置を提供することを目的とする。The present invention has been made to solve such a conventional problem, and provides a small-sized EGR gas cooling device capable of greatly improving the degree of freedom of layout in an engine room as compared with the conventional one. The purpose is to:
【００１０】[0010]
【課題を解決するための手段】請求項１のＥＧＲガス冷
却装置は、ＥＧＲガスを流通させる冷却タンク内に熱交
換部を収容するとともに、この熱交換部に前記冷却タン
クを貫通する冷却水用の入口パイプと出口パイプとを接
続し、前記冷却タンクの両端に前記ＥＧＲガス流通用の
開口部を形成してなり、前記熱交換部を、冷却水空間を
有する平坦形状の熱交換シェルを複数積層し、これ等熱
交換シェルの間を冷却水流路で接続して形成するととも
に、この熱交換部を前記ＥＧＲガスの流入方向に向けて
配置し、前記各熱交換シェルに前記ＥＧＲガスが流通さ
れるガス流通穴を形成してなることを特徴とする。According to a first aspect of the present invention, there is provided an EGR gas cooling device for accommodating a heat exchange section in a cooling tank through which EGR gas flows, and for cooling water passing through the cooling tank through the heat exchange section. An inlet pipe and an outlet pipe are connected to each other, and openings for the EGR gas flow are formed at both ends of the cooling tank. The heat exchange section is formed by a plurality of flat heat exchange shells having a cooling water space. The heat exchange shells are stacked and formed by connecting the heat exchange shells with a cooling water flow path, and the heat exchange portions are arranged in the inflow direction of the EGR gas so that the EGR gas flows through the heat exchange shells. Characterized by forming a gas flow hole to be formed.
【００１１】請求項２のＥＧＲガス冷却装置は、請求項
１記載のＥＧＲガス冷却装置において、前記冷却タンク
を、外筒と、この外筒の両端に配置される側板とにより
形成し、この側板に前記ＥＧＲガス流通用の前記開口部
を形成してなることを特徴とする。請求項３のＥＧＲガ
ス冷却装置は、請求項１または請求項２記載のＥＧＲガ
ス冷却装置において、前記各開口部を、この開口部の軸
を相互に離して配置してなることを特徴とする。According to a second aspect of the present invention, there is provided an EGR gas cooling apparatus according to the first aspect, wherein the cooling tank is formed by an outer cylinder and side plates disposed at both ends of the outer cylinder. Wherein the opening for the EGR gas flow is formed. According to a third aspect of the present invention, there is provided an EGR gas cooling apparatus according to the first or second aspect, wherein each of the openings is arranged such that the axes of the openings are separated from each other. .
【００１２】請求項４のＥＧＲガス冷却装置は、請求項
１ないし請求項３のいずれか１項記載のＥＧＲガス冷却
装置において、前記入口パイプを吸気系側の前記開口部
に隣接して配置し、前記出口パイプを排気系側の前記開
口部に隣接して配置してなることを特徴とする。According to a fourth aspect of the present invention, in the EGR gas cooling device according to any one of the first to third aspects, the inlet pipe is disposed adjacent to the opening on the intake system side. The outlet pipe is disposed adjacent to the opening on the exhaust system side.
【００１３】（作用）請求項１のＥＧＲガス冷却装置で
は、冷却水空間を有する平坦形状の熱交換シェルを複数
積層して熱交換部が形成され、この熱交換部が、熱交換
シェルをＥＧＲガスの流入方向に向けて、冷却タンク内
に収容される。(Effect) In the EGR gas cooling device according to the first aspect, a heat exchange portion is formed by stacking a plurality of flat heat exchange shells having a cooling water space, and the heat exchange portion forms the heat exchange shell with the EGR gas. It is accommodated in a cooling tank in the direction of gas inflow.
【００１４】また、冷却水が入口パイプから各熱交換シ
ェル内の冷却水空間に流通され、この冷却水が、冷却水
流路を通り、隣接する熱交換シェル内に順次流通され
る。さらに、冷却タンクの排気系側の開口部から冷却タ
ンク内に流入されるＥＧＲガスが、熱交換シェルにより
流通方向を変えられ、熱交換シェルに沿って流通し、ガ
ス流通穴を通り、隣接する吸気系側の熱交換シェルに順
次流通される。[0014] Cooling water flows from the inlet pipe to the cooling water space in each heat exchange shell, and the cooling water sequentially flows through the cooling water flow path into the adjacent heat exchange shell. Furthermore, the flow direction of the EGR gas flowing into the cooling tank from the opening on the exhaust system side of the cooling tank is changed by the heat exchange shell, flows along the heat exchange shell, passes through the gas flow hole, and is adjacent to the EGR gas. It is sequentially circulated to the heat exchange shell on the intake system side.
【００１５】そして、ＥＧＲガスが、熱交換シェルを介
して冷却水により冷却され、冷却タンクの吸気系側の開
口部から流出され、熱交換された冷却水が、出口パイプ
から排出される。請求項２のＥＧＲガス冷却装置では、
冷却タンクが、外筒と外筒の両端に配置される側板とに
より、容易に形成され、これ等側板に開口部が形成され
る。The EGR gas is cooled by the cooling water through the heat exchange shell, flows out of the opening of the cooling tank on the intake system side, and the heat exchanged cooling water is discharged from the outlet pipe. In the EGR gas cooling device according to claim 2,
The cooling tank is easily formed by the outer cylinder and side plates arranged at both ends of the outer cylinder, and an opening is formed in these side plates.
【００１６】請求項３のＥＧＲガス冷却装置では、冷却
タンクの両端の各開口部が、これ等開口部の軸を相互に
離して形成され、ＥＧＲガスが、冷却タンク内の熱交換
シェルの隅々まで流通され、より効率良く冷却される。
請求項４のＥＧＲガス冷却装置では、入口パイプが吸気
系側の開口部に隣接して配置され、出口パイプが排気系
側の開口部に隣接して配置され、ＥＧＲガスの流路およ
び冷却水の流路が、冷却タンクの両端に確保される。In the EGR gas cooling device according to the third aspect, the openings at both ends of the cooling tank are formed with their axes separated from each other, and the EGR gas is supplied to the corner of the heat exchange shell in the cooling tank. It is distributed to various places and cooled more efficiently.
In the EGR gas cooling device according to the fourth aspect, the inlet pipe is disposed adjacent to the opening on the intake system side, the outlet pipe is disposed adjacent to the opening on the exhaust system side, and the EGR gas flow path and the cooling water are disposed. Are secured at both ends of the cooling tank.
【００１７】[0017]
【発明の実施の形態】以下、本発明の実施形態を図面を
用いて詳細に説明する。図１は、本発明のＥＧＲガス冷
却装置の一実施形態（請求項１ないし請求項４に対応す
る）を示しており、符号２１は、例えば、ステンレス鋼
等からなる冷却タンクである。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment (corresponding to claims 1 to 4) of an EGR gas cooling apparatus according to the present invention, and reference numeral 21 denotes a cooling tank made of, for example, stainless steel.
【００１８】この冷却タンク２１は、断面円形形状の外
筒２２，および外筒２２の両端に配置される円形形状の
側板２３，２４により形成されている。この側板２３，
２４には、ＥＧＲガス２５流通用の開口穴２３ａ，２４
ａが、これ等開口穴２３ａ，２４ａの軸を相互に離して
形成されている。開口穴２３ａ，２４ａには、フランジ
２７，２７が固定されている。The cooling tank 21 is formed by an outer cylinder 22 having a circular cross section and circular side plates 23 and 24 arranged at both ends of the outer cylinder 22. This side plate 23,
24 have opening holes 23a, 24 for flowing the EGR gas 25.
a are formed such that the axes of the opening holes 23a and 24a are separated from each other. Flanges 27, 27 are fixed to the opening holes 23a, 24a.
【００１９】側板２３，２４の開口穴２３ａ，２４ａに
隣接する位置には、冷却水２９流通用の開口穴２３ｂ，
２４ｂが形成されている。この開口穴２３ｂ，２４ｂに
は、開口穴２３ｂ，２４ｂを貫通して、例えば、ステン
レス鋼等からなる入口パイプ３１および出口パイプ３３
が固定されている。At positions adjacent to the opening holes 23a, 24a of the side plates 23, 24, there are opening holes 23b,
24b are formed. The opening pipes 23b and 24b pass through the opening holes 23b and 24b, and are formed with an inlet pipe 31 and an outlet pipe 33 made of, for example, stainless steel.
Has been fixed.
【００２０】一方、外筒２２内には、例えば、ステンレ
ス鋼等からなる熱交換部３５が収容されている。この熱
交換部３５は、図２に示すように、一対の平坦形状をし
たプレート部材３７，３７が相互に向き合う状態で重ね
られ、冷却水空間４１を有する熱交換シェル４３が形成
され、これ等熱交換シェル４３が複数積層され構成され
ている。On the other hand, a heat exchange section 35 made of, for example, stainless steel is accommodated in the outer cylinder 22. As shown in FIG. 2, a pair of flat plate members 37, 37 are superposed on each other in a state where they face each other, and a heat exchange shell 43 having a cooling water space 41 is formed. A plurality of heat exchange shells 43 are stacked.
【００２１】プレート部材３７には、所定間隔を置い
て、冷却水２９流通用の流通穴３７ａ，３７ａが形成さ
れている。この流通穴３７ａ，３７ａの周囲は、例え
ば、プレス加工等により外側に向けて突出され、カップ
形状に形成されている。そして、隣接する熱交換シェル
４３のプレート部材３７の突出する流通穴３７ａ，３７
ａが、互いに接続され冷却水流路４５が形成されてい
る。The plate member 37 is formed with flow holes 37a for flowing the cooling water 29 at predetermined intervals. The periphery of the circulation holes 37a, 37a is projected outward by, for example, press working, and is formed in a cup shape. Then, the flow holes 37a, 37 protruding from the plate member 37 of the adjacent heat exchange shell 43.
are connected to each other to form a cooling water channel 45.
【００２２】また、熱交換部３５の吸気系側のプレート
部材３７には、流通穴３７ａが１箇所のみ形成され、こ
の流通穴３７ａと入口パイプ３１とが接続されている。
熱交換部２３の排気系側のプレート部材３７には、流通
穴３７ａが１箇所のみ形成され、この流通穴３７ａと出
口パイプ３３とが接続されている。各熱交換シェル４３
には、この熱交換シェル４３を貫通するガス流通穴４３
ａ，４３ａが、開口穴２３ａ，２４ａの軸長上に形成さ
れている。The plate member 37 on the intake system side of the heat exchange section 35 has only one flow hole 37a, and the flow hole 37a is connected to the inlet pipe 31.
The plate member 37 on the exhaust system side of the heat exchange unit 23 has only one circulation hole 37a, and the circulation hole 37a is connected to the outlet pipe 33. Each heat exchange shell 43
The gas exchange hole 43 penetrating this heat exchange shell 43
a, 43a are formed on the axial length of the opening holes 23a, 24a.
【００２３】上述したＥＧＲガス冷却装置は、先ず、プ
レート部材３７，３７を重ねた熱交換シェル４３が複数
積層され、熱交換部３５が形成される。次に、この熱交
換部３５が、外筒２２内に収容され、外筒２２の両端に
側板２３，２４が配置される。さらに、この側板２３，
２４にフランジ２７，２７および入口パイプ３１，出口
パイプ３３が配置される。In the above-described EGR gas cooling apparatus, first, a plurality of heat exchange shells 43 in which the plate members 37, 37 are stacked are laminated to form a heat exchange section 35. Next, the heat exchanging section 35 is housed in the outer cylinder 22, and the side plates 23 and 24 are arranged at both ends of the outer cylinder 22. Further, the side plates 23,
The flanges 27, 27, the inlet pipe 31, and the outlet pipe 33 are arranged at 24.
【００２４】そして、各部材が、例えば、ニッケルろう
等によりろう付けされ、ＥＧＲガス冷却装置が形成され
る。上述したＥＧＲガス冷却装置では、以下に述べるよ
うにして、ＥＧＲガス２５が冷却される。すなわち、図
３に示すように、先ず、冷却水２９が、入口パイプ３１
から熱交換シェル４３内に流入され、この冷却水２９
は、冷却水空間４１内に流通され、流通穴３７ａ，３７
ａを通り、隣接する熱交換シェル４３内に順次流入され
る。Then, the respective members are brazed by, for example, nickel brazing or the like to form an EGR gas cooling device. In the EGR gas cooling device described above, the EGR gas 25 is cooled as described below. That is, as shown in FIG.
From the cooling water 29 into the heat exchange shell 43.
Is circulated in the cooling water space 41 and the circulation holes 37a, 37
a, and sequentially flows into the adjacent heat exchange shell 43.
【００２５】一方、ＥＧＲガス２５は、フランジ２７か
ら外筒２２内に流入され、熱交換シェル４３のプレート
部材３７により、流通方向を変えられてプレート部材３
７に沿って側方に流れ、ガス流通穴４３ａ，４３ａを通
り、隣接する熱交換シェル４３側に順次流通される。こ
のように外筒２２内を流通されるＥＧＲガス２５が、熱
交換シェル４３を介して、冷却水２９により冷却され、
冷却されたＥＧＲガス２５は、側板２３側のフランジ２
７から流出される。On the other hand, the EGR gas 25 flows into the outer cylinder 22 from the flange 27, and the flow direction is changed by the plate member 37 of the heat exchange shell 43 so that the plate member 3
7, the gas flows through the gas flow holes 43a, 43a, and sequentially flows to the adjacent heat exchange shell 43 side. Thus, the EGR gas 25 flowing through the outer cylinder 22 is cooled by the cooling water 29 via the heat exchange shell 43,
The cooled EGR gas 25 is supplied to the flange 2 on the side plate 23 side.
Spilled out of 7.
【００２６】また、熱交換され昇温した冷却水２９は、
出口パイプ３３から排出される。以上のように構成され
たＥＧＲガス冷却装置では、冷却水空間４１を有する平
坦形状の熱交換シェル４３を複数積層して熱交換部３５
を形成し、この熱交換部３５を、熱交換シェル４３をＥ
ＧＲガス２５の流入方向に向けて、外筒２２内に収容し
たので、外筒２２の排気系側の開口穴２４ａから外筒２
２内に流入するＥＧＲガス２５を、熱交換シェル４３に
より流通方向を変えながら、熱交換シェル４３に沿って
流通させ、隣接する吸気系側の熱交換シェル４３に順次
流通させることができる。The cooling water 29 that has undergone heat exchange and rises in temperature is
It is discharged from the outlet pipe 33. In the EGR gas cooling device configured as described above, a plurality of flat heat exchange shells 43 each having a cooling water space 41 are stacked and a heat exchange unit 35 is formed.
Is formed, and the heat exchange part 35 is formed by the heat exchange shell 43.
Since the GR gas 25 is accommodated in the outer cylinder 22 in the inflow direction, the outer cylinder 2 is inserted through the opening hole 24a of the outer cylinder 22 on the exhaust system side.
The EGR gas 25 flowing into the inside 2 can be circulated along the heat exchange shell 43 while changing the flow direction by the heat exchange shell 43, and can be sequentially circulated to the adjacent heat exchange shell 43 on the intake system side.
【００２７】このため、ＥＧＲガス２５を従来に比べ小
型の外筒２２内で効率よく冷却することができ、エンジ
ンルーム内へのレイアウトの自由度を従来に比べ大幅に
向上することができる。For this reason, the EGR gas 25 can be efficiently cooled in the outer cylinder 22 which is smaller than before, and the degree of freedom in layout in the engine room can be greatly improved as compared with the conventional case.
【００２８】また、冷却タンク２１を、外筒２２と側板
２３，２４とにより形成したので、冷却タンク２１を容
易に形成することができ、これ等側板２３，２４にＥＧ
Ｒガス２５流通用の開口穴２３ａ，２４ａを容易に形成
することができる。そして、開口穴２３ａ，２４ａを、
開口穴２３ａ，２４ａの軸を相互に離して形成したの
で、ＥＧＲガス２５を外筒２２内の熱交換シェル４３の
隅々まで流通させることができ、より効率良く冷却する
ことができる。Further, since the cooling tank 21 is formed by the outer cylinder 22 and the side plates 23 and 24, the cooling tank 21 can be easily formed.
The opening holes 23a and 24a for flowing the R gas 25 can be easily formed. Then, the opening holes 23a and 24a are
Since the shafts of the opening holes 23a and 24a are formed apart from each other, the EGR gas 25 can be circulated to every corner of the heat exchange shell 43 in the outer cylinder 22, and cooling can be performed more efficiently.
【００２９】そして、入口パイプ３１を吸気系側の開口
穴２３ａに隣接して配置し、出口パイプ３３を排気系側
の開口穴２４ａに隣接して配置したので、ＥＧＲガス２
５の流路および冷却水２９の流路を、冷却タンク２１の
両端に確保することができ、より高い自由度でエンジン
ルーム内に配置することができる。なお、上述した実施
形態では、表面加工をしていないプレート部材３７，３
７を用いて熱交換シェル４３を形成した例について述べ
たが、本発明はかかる実施形態に限定されるものでな
く、例えば、図４および図５に示すように、表面にディ
ンプル加工５１を施したプレート部材３７，３７を用い
て熱交換シェル４３を形成しても良く、この場合、より
高い熱交換効率でＥＧＲガス２５を冷却することができ
る。Since the inlet pipe 31 is arranged adjacent to the opening 23a on the intake system side and the outlet pipe 33 is arranged adjacent to the opening 24a on the exhaust system side, the EGR gas 2
The flow path 5 and the flow path of the cooling water 29 can be secured at both ends of the cooling tank 21 and can be arranged in the engine room with a higher degree of freedom. In the above-described embodiment, the plate members 37, 3 not subjected to surface processing are used.
7 has been described, the present invention is not limited to such an embodiment. For example, as shown in FIG. 4 and FIG. The heat exchange shell 43 may be formed using the plate members 37, 37 in which the EGR gas 25 can be cooled with higher heat exchange efficiency.
【００３０】また、上述した実施形態では、断面円形形
状の外筒２２および円形形状の側板２３，２４を用いた
例について述べたが、本発明はかかる実施形態に限定さ
れるものでなく、例えば、図６に示すように、断面四角
形形状の外筒２２および四角形形状の側板２３，２４を
用いても良く、あるいは、図７に示すように、断面六角
形形状の外筒２２および六角形形状の側板２３，２４を
用いても良い。Further, in the above-described embodiment, an example using the outer cylinder 22 having a circular cross section and the side plates 23 and 24 having a circular shape has been described. However, the present invention is not limited to this embodiment. As shown in FIG. 6, an outer cylinder 22 having a rectangular cross section and side plates 23 and 24 having a rectangular shape may be used. Alternatively, as shown in FIG. 7, an outer cylinder 22 having a hexagonal cross section and a hexagonal shape may be used. May be used.
【００３１】そして、上述した実施形態では、側板２３
に入口パイプ３１を固定し、側板２４に出口パイプ３３
を固定し、冷却水２９を側板２３側から流入し、側板２
４側から排出した例について述べたが、本発明はかかる
実施形態に限定されるものでなく、例えば、側板２４に
入口パイプ３１および出口パイプ３３を固定し、冷却水
２９を側板２４側からのみ流入，排出しても良く、この
場合、冷却水２９用の配管を側板２４側のみで行うこと
ができるため、ＥＧＲガス冷却装置のエンジンルーム内
へのレイアウトをより高い自由度で行うことができる。In the embodiment described above, the side plate 23
And the outlet pipe 33 is fixed to the side plate 24.
And the cooling water 29 flows in from the side plate 23 side, and the side plate 2
Although an example of discharging from the 4 side has been described, the present invention is not limited to this embodiment. For example, the inlet pipe 31 and the outlet pipe 33 are fixed to the side plate 24, and the cooling water 29 is supplied only from the side plate 24 side. Inflow and discharge may be performed. In this case, since the piping for the cooling water 29 can be formed only on the side plate 24 side, the layout of the EGR gas cooling device in the engine room can be performed with a higher degree of freedom. .
【００３２】[0032]
【発明の効果】請求項１のＥＧＲガス冷却装置では、冷
却水空間を有する平坦形状の熱交換シェルを複数積層し
て熱交換部を形成し、この熱交換部を、熱交換シェルを
ＥＧＲガスの流入方向に向けて、冷却タンク内に収容し
たので、冷却タンクの排気系側の開口部からタンク内に
流入されるＥＧＲガスを、熱交換シェルにより流通方向
を変えながら、熱交換シェルに沿って流通させ、隣接す
る吸気系側の熱交換シェルに順次流通させることができ
る。According to the first aspect of the present invention, a heat exchange portion is formed by stacking a plurality of flat heat exchange shells each having a cooling water space, and the heat exchange portion is formed of an EGR gas. The EGR gas flowing into the tank from the opening on the exhaust system side of the cooling tank along the heat exchange shell while changing the flow direction by the heat exchange shell. And then successively to the adjacent heat exchange shell on the intake system side.
【００３３】このため、ＥＧＲガスを従来に比べ小型の
冷却タンク内で効率よく冷却することができ、エンジン
ルーム内へのレイアウトの自由度を従来に比べ大幅に向
上することができる。請求項２のＥＧＲガス冷却装置で
は、冷却タンクを、外筒と側板とにより形成したので、
冷却タンクを容易に形成することができ、側板にＥＧＲ
ガス流通用の開口部を容易に形成することができる。For this reason, the EGR gas can be efficiently cooled in a small cooling tank as compared with the conventional case, and the degree of freedom in layout in the engine room can be greatly improved as compared with the conventional case. In the EGR gas cooling device according to claim 2, the cooling tank is formed by the outer cylinder and the side plate,
The cooling tank can be easily formed, and the EGR
An opening for gas distribution can be easily formed.
【００３４】請求項３のＥＧＲガス冷却装置では、冷却
タンクの両端の各開口部を、これ等開口部の軸を相互に
離して形成したので、ＥＧＲガスを冷却タンク内の熱交
換シェルの隅々まで流通させることができ、より効率良
く冷却することができる。請求項４のＥＧＲガス冷却装
置では、入口パイプを吸気系側の開口部に隣接して配置
し、出口パイプを排気系側の開口部に隣接して配置した
ので、ＥＧＲガスの流路および冷却水の流路を、冷却タ
ンクの両端に確保することができ、より高い自由度でエ
ンジンルーム内に配置することができる。In the EGR gas cooling device according to the third aspect, since the openings at both ends of the cooling tank are formed with their axes separated from each other, the EGR gas is supplied to the corner of the heat exchange shell in the cooling tank. It can be distributed to various parts and can be cooled more efficiently. In the EGR gas cooling device according to the fourth aspect, the inlet pipe is disposed adjacent to the opening on the intake system side, and the outlet pipe is disposed adjacent to the opening on the exhaust system side. Water flow paths can be secured at both ends of the cooling tank, and can be arranged in the engine room with a higher degree of freedom.
【図１】本発明のＥＧＲガス冷却装置の一実施形態を示
す斜視図である。FIG. 1 is a perspective view showing one embodiment of an EGR gas cooling device of the present invention.
【図２】図１の分解斜視図である。FIG. 2 is an exploded perspective view of FIG.
【図３】冷却水およびＥＧＲガスの流通状態を示す分解
斜視図である。FIG. 3 is an exploded perspective view showing a flow state of cooling water and EGR gas.
【図４】熱交換部のプレート部材にディンプル加工を施
した例を示す側面図である。FIG. 4 is a side view showing an example in which dimple processing is performed on a plate member of a heat exchange unit.
【図５】図４の断面図である。FIG. 5 is a sectional view of FIG. 4;
【図６】外筒を断面四角形形状に形成した例を示す側面
図である。FIG. 6 is a side view showing an example in which the outer cylinder is formed in a rectangular cross section.
【図７】外筒を断面六角形形状に形成した例を示す側面
図である。FIG. 7 is a side view showing an example in which the outer cylinder has a hexagonal cross section.
【図８】従来のＥＧＲ装置を示す説明図である。FIG. 8 is an explanatory view showing a conventional EGR device.
【図９】従来のＥＧＲガス冷却装置を示す斜視図であ
る。FIG. 9 is a perspective view showing a conventional EGR gas cooling device.
【図１０】図９の要部の詳細を示す断面図である。FIG. 10 is a sectional view showing details of a main part of FIG. 9;
２１ 冷却タンク ２２ 外筒 ２３，２４ 側板 ２３ａ，２４ａ 開口穴（開口部） ２５ ＥＧＲガス ２９ 冷却水 ３１ 入口パイプ ３３ 出口パイプ ３５ 熱交換部 ４１ 冷却水空間 ４３ 熱交換シェル ４３ａ ガス流通穴 ４５ 冷却水流路 Reference Signs List 21 cooling tank 22 outer cylinder 23, 24 side plate 23a, 24a opening hole (opening) 25 EGR gas 29 cooling water 31 inlet pipe 33 outlet pipe 35 heat exchange unit 41 cooling water space 43 heat exchange shell 43a gas circulation hole 45 cooling water flow Road
Claims (4)
ンク（２１）内に熱交換部（３５）を収容するととも
に、この熱交換部（３５）に前記冷却タンク（２１）を
貫通する冷却水（２９）用の入口パイプ（３１）と出口
パイプ（３３）とを接続し、前記冷却タンク（２１）の
両端に前記ＥＧＲガス（２５）流通用の開口部（２３
ａ，２４ａ）を形成してなり、 前記熱交換部（３５）を、冷却水空間（４１）を有する
平坦形状の熱交換シェル（４３）を複数積層し、これ等
熱交換シェル（４３）の間を冷却水流路（４５）で接続
して形成するとともに、この熱交換部（３５）を前記Ｅ
ＧＲガス（２５）の流入方向に向けて配置し、前記各熱
交換シェル（４３）に前記ＥＧＲガス（２５）が流通さ
れるガス流通穴（４３ａ）を形成してなることを特徴と
するＥＧＲガス冷却装置。1. A heat exchange unit (35) is accommodated in a cooling tank (21) through which an EGR gas (25) flows, and cooling water passing through the cooling tank (21) is inserted into the heat exchange unit (35). An inlet pipe (31) and an outlet pipe (33) for (29) are connected, and openings (23) for flowing the EGR gas (25) are provided at both ends of the cooling tank (21).
a, 24a). The heat exchange part (35) is formed by stacking a plurality of flat heat exchange shells (43) each having a cooling water space (41). The cooling water flow path (45) connects the spaces and forms the heat exchange part (35).
EGR arranged in a direction in which the GR gas (25) flows in, and a gas flow hole (43a) through which the EGR gas (25) flows is formed in each of the heat exchange shells (43). Gas cooling device.
いて、 前記冷却タンク（２１）を、外筒（２２）と、この外筒
（２２）の両端に配置される側板（２３，２４）とによ
り形成し、この側板（２３，２４）に前記ＥＧＲガス
（２５）流通用の前記開口部（２３ａ，２４ａ）を形成
してなることを特徴とするＥＧＲガス冷却装置。2. The EGR gas cooling device according to claim 1, wherein the cooling tank (21) includes an outer cylinder (22) and side plates (23, 24) disposed at both ends of the outer cylinder (22). An EGR gas cooling device characterized in that the side plates (23, 24) are formed with the openings (23a, 24a) for flowing the EGR gas (25).
ス冷却装置において、 前記各開口部（２３ａ，２４ａ）を、この開口部（２３
ａ，２４ａ）の軸を相互に離して形成してなることを特
徴とするＥＧＲガス冷却装置。3. The EGR gas cooling device according to claim 1, wherein each of said openings (23a, 24a) is formed by said opening (23).
An EGR gas cooling device characterized in that the shafts a, 24a) are formed apart from each other.
記載のＥＧＲガス冷却装置において、 前記入口パイプ（３１）を吸気系側の前記開口部（２３
ａ）に隣接して配置し、前記出口パイプ（３３）を排気
系側の前記開口部（２４ａ）に隣接して配置してなるこ
とを特徴とするＥＧＲガス冷却装置。4. The EGR gas cooling device according to claim 1, wherein said inlet pipe is connected to said opening portion on an intake system side.
An EGR gas cooling device, wherein the EGR gas cooling device is disposed adjacent to (a) and the outlet pipe (33) is disposed adjacent to the opening (24a) on the exhaust system side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9168592A JPH1113556A (en) | 1997-06-25 | 1997-06-25 | Egr gas cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9168592A JPH1113556A (en) | 1997-06-25 | 1997-06-25 | Egr gas cooling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1113556A true JPH1113556A (en) | 1999-01-19 |
Family
ID=15870918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9168592A Pending JPH1113556A (en) | 1997-06-25 | 1997-06-25 | Egr gas cooling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1113556A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003071214A1 (en) * | 2002-02-20 | 2003-08-28 | Peter Prechtl | Heat exchanger system |
| CN102052124A (en) * | 2009-11-02 | 2011-05-11 | 万国引擎知识产权有限责任公司 | Forced convection egr cooling system |
| KR101447894B1 (en) * | 2013-11-01 | 2014-10-08 | 손정열 | Dyeing solution heat exchanger for dyeing machine |
| KR101513182B1 (en) * | 2014-07-15 | 2015-04-17 | 삼성탈레스 주식회사 | Active Shape Memory J-T mini Cooler |
-
1997
- 1997-06-25 JP JP9168592A patent/JPH1113556A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003071214A1 (en) * | 2002-02-20 | 2003-08-28 | Peter Prechtl | Heat exchanger system |
| CN102052124A (en) * | 2009-11-02 | 2011-05-11 | 万国引擎知识产权有限责任公司 | Forced convection egr cooling system |
| KR101447894B1 (en) * | 2013-11-01 | 2014-10-08 | 손정열 | Dyeing solution heat exchanger for dyeing machine |
| KR101513182B1 (en) * | 2014-07-15 | 2015-04-17 | 삼성탈레스 주식회사 | Active Shape Memory J-T mini Cooler |
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