JP2004027901A - Internal combustion engine with plural air coolers - Google Patents

Internal combustion engine with plural air coolers Download PDF

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Publication number
JP2004027901A
JP2004027901A JP2002182731A JP2002182731A JP2004027901A JP 2004027901 A JP2004027901 A JP 2004027901A JP 2002182731 A JP2002182731 A JP 2002182731A JP 2002182731 A JP2002182731 A JP 2002182731A JP 2004027901 A JP2004027901 A JP 2004027901A
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cooling water
air
air cooler
case
cooling
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JP2002182731A
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JP4274746B2 (en
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Takuya Kumagai
熊谷　拓也
Akira Numata
沼田　明
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Mitsubishi Heavy Industries Ltd
Japan Petroleum Energy Center JPEC
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Petroleum Energy Center PEC
Mitsubishi Heavy Industries Ltd
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    • 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

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Abstract

<P>PROBLEM TO BE SOLVED: To facilitate a cooling water piping work in a narrow space by simplifying a cooling water piping of a plurality of air coolers, reduce manhour of piping work, and reduce a cooling water piping part cost by reducing a number of cooling water piping parts in an internal combustion engine provided with a plurality of air coolers in the front and rear directions. <P>SOLUTION: This internal combustion engine is equipped with a plurality of air coolers arranged parallel to air flow. A cooling water inlet pipe and a cooling water outlet pipe are connected with an upstream air cooler, and a cooling water passage toward a downstream air cooler is installed inside the upstream air cooler, and cooling water supplied and exhausted to the downstream air cooler can be made to flow through the cooling water passage. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、Ｖ型ディーゼル機関、多シリンダの直列型ディーゼル機関等に適用され、機関への空気を冷却水により冷却するエアクーラを給気通路に空気流に対して並列に複数個配設した内燃機関に関する。
【０００２】
【従来の技術】
Ｖ型ディーゼル機関や多シリンダの直列型ディーゼル機関において、冷却水により機関への空気を冷却するエアクーラを複数個設置する場合には、機関の前後方向（軸方向）の気筒（シリンダ）間で給気温度を一定に保持するため、給気通路に複数個のエアクーラを空気流に対して並列に配置して、各エアクーラに冷却水を均一に流すようにしている。
【０００３】
図７及び図８は、かかる複数個のエアクーラを給気通路に空気流に対して並列に配置したディーゼル機関の１例を模式的に示しており、図７はエアクーラの平面構成図、図８は斜視構成図である。
図７〜８において、１００、１００ａはエアクーラであり、この例では該エアクーラ１００を機関の前後方向（軸方向）に２個（１００、１００ａ）、空気流に対して並列に配置して各エアクーラ１００、１００ａに冷却水を均一に流すようにしている。
該エアクーラ１００において、０１はケース、２は該ケース０１内に収納された冷却用エレメント、４は該冷却用エレメント２を貫流する空気の流路である空気通路で、過給機（図示省略）からの空気は該空気通路４を紙面に直角方向に前記冷却用エレメント２を貫流するようになっている。
【０００４】
０６は冷却水入口管、０７は冷却水出口管であり、該冷却水入口管０６及び冷却水出口管０７は上流側のエアクーラ１００における冷却用エレメント２の冷却水ヘッダー２ａに接続されている。２０及び０５は下流側のエアクーラ１００ａへの冷却水接続管で、該下流側のエアクーラ１００ａにおける冷却用エレメント２の冷却水ヘッダー２ａと前記冷却水入口管０６及び冷却水出口管０７とを接続している。
【０００５】
かかる構成からなるエアクーラを備えたディーゼル機関において、冷却水は冷却水入口管０６から上流側のエアクーラ１００における冷却用エレメント２の冷却水ヘッダー２ａに流入するとともに、一方側の冷却水接続管２０、０５を通って下流側のエアクーラ１００ａにおける冷却用エレメント２の冷却水ヘッダー２ａに流入する。
そして、該冷却水は前記上流側のエアクーラ１００における冷却用エレメント２内及び下流側のエアクーラ１００ａにおける冷却用エレメント２内を通流して、夫々の冷却用エレメント２にて該冷却用エレメント２を紙面に直角方向に貫流している過給機（図示省略）からの空気と熱交換して該空気を冷却する。
【０００６】
前記上流側のエアクーラ１００の冷却用エレメント２において空気を冷却した冷却水は冷却水ヘッダー２ａを経て冷却水出口管０７に流出し、また前記下流側のエアクーラ１００ａの冷却用エレメント２において空気を冷却した冷却水は冷却水ヘッダー２ａを経て前記冷却水接続管０５、２０に入り、該冷却水接続管２０から前記冷却水出口管０７に入って前記上流側のエアクーラ１００からの冷却水と合流する。
【０００７】
【発明が解決しようとする課題】
Ｖ型内燃機関、多シリンダの直列型内燃機関の何れにおいても、複数のエアクーラ１００、１００ａを機関の前後方向に配設する場合には、該エアクーラ１００、１００ａの側部のスペースがきわめて狭い。
然るに、図７〜８に示される従来技術にあっては、複数個（この例では２個）のエアクーラ１００、１００ａを空気流に対して機関の前後方向に並列に配置して、各エアクーラ１００、１００ａに冷却水を均一に流すようにしているのに伴い、下流側のエアクーラ１００ａと冷却水入口管０６及び冷却水出口管０７との間を上流側のエアクーラ１００におけるケース０１の外側を通した冷却水接続管２０によって接続している。
【０００８】
このため、かかる従来技術にあっては、前記のように、下流側のエアクーラ１００ａと冷却水入口管０６及び冷却水出口管０７とを接続する冷却水接続管２０をケース０１の外側を通していることから、狭隘なスペースでの冷却水接続管２０の配管作業が困難となり、エアクーラの冷却水配管作業に多大な工数を要する。
また、前記ケース０１の外側を通した冷却水接続管２０を設けるため、冷却水配管部品数が多くなり部品コストが増加する、
等の問題点を有している。
【０００９】
本発明はかかる従来技術の課題に鑑み、複数のエアクーラを機関の前後方向に配設する内燃機関において、前記複数のエアクーラの冷却水配管を簡単化して狭隘なスペースでの冷却水配管作業を容易になし得るとともに配管作業工数を低減し、かつ冷却水配管部品数を減少して冷却水配管部品コストを低減することを目的とする。
【００１０】
【課題を解決するための手段】
本発明はかかる課題を解決するため、請求項１の発明として、ケース内に設置された冷却用エレメントにて該ケース内を流過する機関への空気と冷却水とを熱交換して該空気を冷却するエアクーラを前記機関の給気通路に空気流に対して並列に複数個配設してなる内燃機関において、前記エアクーラのうち冷却水流の上流側に位置する上流側エアクーラのケース内部にこれよりも下流側に位置する下流側エアクーラへの冷却水が通流する冷却水通路を形成するとともに、最上流側のエアクーラの冷却用エレメント及び冷却水通路に冷却水入口管及び冷却水出口管を接続したことを特徴とする複数のエアクーラを備えた内燃機関を提案する。
【００１１】
請求項１において、好ましくは請求項２及び請求項３のように構成するのがよい。
即ち、請求項２においては、前記冷却水通路は、前記ケース内部の冷却用エレメントが収納される空気通路の両側に隔壁を介して形成されてなる。
【００１２】
また、請求項３においては、前記複数のエアクーラのケースを共通に構成し、各ケースに形成された前記冷却水通路を接続管路により接続してなる。
【００１３】
かかる発明によれば、冷却水流の上流側エアクーラのケース内に下流側に位置するエアクーラへの冷却水通路を設けて、該上流側エアクーラの冷却用エレメントへの通路とともにケース内に設けた下流側エアクーラへの冷却水通路を冷却水入口管及び冷却水出口管に接続したので、複数のエアクーラの冷却水通路を全てケース内に形成することにより、エアクーラケースの外側を通す冷却水配管が不要となる。
【００１４】
これにより、従来技術のような冷却水接続管をエアクーラケースの外側を通すものに比べてエアクーラ冷却水配管を簡単化できて、狭隘なスペースであっても冷却水配管作業を容易に行うことができ、従来技術に比べて冷却水配管の作業工数を大幅に低減できる。
【００１５】
また、従来技術のような、エアクーラケースの外側を通す冷却水配管が不要となることにより、従来技術に比べて冷却水配管部品数を減少することができて、エアクーラの組立コスト及び部品コストを低減することができる。
さらに請求項３のように構成すれば、複数のエアクーラケースの内部に冷却水通路を夫々形成し、該複数のエアクーラケースを共通に構成したので、エアクーラ部品の互換性が向上するとともに部品アイテム数が減少する。
【００１６】
【発明の実施の形態】
以下、本発明を図に示した実施例を用いて詳細に説明する。但し、この実施例に記載されている構成部品の寸法、材質、形状、その相対配置などは特に特定的な記載がない限り、この発明の範囲をそれのみに限定する趣旨ではなく、単なる説明例にすぎない。
【００１７】
図１は本発明の実施例に係るディーゼル機関用エアクーラの平面構成図、図２は図１のＡ―Ａ線断面図、図３は図１のＢ―Ｂ矢視図、図４は斜視構成図である。図５は前記実施例におけるエアクーラの配置態様を示す平面構成図である。図６は本発明が適用されるエアクーラを装備したＶ型ディーゼル機関の断面図である。
【００１８】
本発明が適用されるＶ型ディーゼル機関を示す図６において、２００はエンジン（Ｖ型ディーゼル機関）、２０１はクランクケース、２０１ａは機関中心、２０２は該クランクケース２０１のＶバンク上に固着されたシリンダヘッドである。
１００は該シリンダヘッド２０２の間に、機関の前後方向（クランク軸方向）に複数個設置されたエアクーラ、２は該エアクーラ１００の冷却用エレメントである。１０１は過給機（図示省略）の空気出口と該エアクーラ１００とを接続する給気管である。
【００１９】
本発明は、前記のような機関の前後方向に複数個設置されたエアクーラの構造に係るものである。
本発明の実施例を示す図１〜図４において、１００は冷却水流の上流側に配置された上流側エアクーラ、１００ａは下流側エアクーラであり、この例では該エアクーラ１００及び１００ａを機関の前後方向即ちクランク軸方向に２個、図２〜３のように空気流に対して並列に配置して各エアクーラ１００、１００ａに冷却水を均一に流すようにしている。
【００２０】
該エアクーラ１００、１００ａにおいて、１はケース、２は該ケース１内に収納された冷却用エレメント、４は該冷却用エレメント２を貫流する空気の流路である空気通路で、過給機（図示省略）からの空気は該空気通路４を紙面に直角方向に前記冷却用エレメント２を貫流するようになっている。
【００２１】
６は冷却水入口管、７は冷却水出口管であり、該冷却水入口管６及び冷却水出口管７は、冷却水入口フランジ１２及び冷却水出口フランジ８が夫々形成された冷却水入口７ａ及び冷却水出口８ａを介して、前記上流側エアクーラ１００における冷却用エレメント２の冷却水ヘッダー部２ａに接続されている。
３は前記上流側エアクーラ１００の内部に形成された冷却水通路で、図２に示すように、ケース１内の前記冷却用エレメント２が収納される空気通路４の両側にケース外壁１ａ及びケース内壁１ｂに囲まれて形成されている。
【００２２】
前記冷却水通路３は前記上流側エアクーラ１００の内部において該上流側エアクーラ１００の冷却水ヘッダー部２ａへの冷却水通路に接続されている。
５は接続管で、前記上流側エアクーラ１００内に形成された冷却水通路３の下流端部と前記下流側エアクーラ１００ａの冷却水ヘッダー部２ａとを接続管フランジ１０を介して接続している。
【００２３】
かかる構成からなるエアクーラを備えたディーゼル機関において、冷却水は冷却水入口管６から上流側エアクーラ１００における冷却用エレメント２の冷却水ヘッダー部２ａに流入する。これとともに前記冷却水は上流側エアクーラ１００のケース１内に形成された冷却水通路３の一方側（入口側）を通り接続管５を経て下流側エアクーラ１００ａにおける冷却用エレメント２の冷却水ヘッダー２ａに流入する。
【００２４】
そして、該冷却水は前記上流側エアクーラ１００おける冷却用エレメント２内及び下流側エアクーラ１００ａにおける冷却用エレメント２内を通流して、夫々の冷却用エレメント２において該冷却用エレメント２を紙面に直角方向に貫流している過給機（図示省略）からの空気と熱交換して該空気を冷却する。
【００２５】
前記上流側エアクーラ１００の冷却用エレメント２において空気を冷却した冷却水は冷却水ヘッダー部２ａを経て冷却水出口管７に流出する。また前記下流側エアクーラ１００ａの冷却用エレメント２において空気を冷却した冷却水は、該冷却水ヘッダー２ａを経て上流側エアクーラ１００のケース１内に形成された冷却水通路３の他方側（出口側）を通り、前記冷却水出口管７に入って前記上流側エアクーラ１００からの冷却水と合流し、系外に排出される。
【００２６】
かかる実施例によれば、空気流に対して並列に設けられた複数のエアクーラのうち、冷却水流の上流側エアクーラ１００のケース１内に下流側エアクーラ１００ａに接続される冷却水通路３を設けて、該上流側エアクーラ１００の冷却水ヘッダー部２ａへの冷却水通路とともに該上流側エアクーラ１００のケース１内に設けた下流側エアクーラ１００ａへの冷却水通路３を冷却水入口管６及び冷却水出口管７に接続したので、複数のエアクーラの冷却水通路３を全てケース１内に形成することができて、図７〜８に示す従来技術のようなエアクーラのケース０１の外側を通す冷却水配管０５、２０が不要となる。
【００２７】
これにより、従来技術のような冷却水接続管をエアクーラケースの外側を通すものに比べてエアクーラ冷却水配管をコンパクトにかつ簡単化できる。従って、エアクーラケースの外側を通す冷却水配管がないため、狭隘なスペースであっても冷却水配管作業を容易にかつ少ない作業工数で行うことができ、また従来技術に比べて冷却水配管部品数を減少することができる。
【００２８】
また、図５に示すように、空気流に対して並列に配置した複数のエアクーラのケースを共通に構成する。
即ち、図５の（Ａ）はエアクーラ１００を１個設置した場合、（Ｂ）及び（Ｃ）は本発明に係るもので、（Ｂ）はエアクーラを空気流に対して２個（１００、１００ａ）並列に配置した場合、（Ｃ）はエアクーラを空気流に対して３個（１００、１００ａ、１００ｂ）並列に配置した場合を夫々示す。
【００２９】
図５において、１はエアクーラのケースであり、内部に図１〜４の実施例と同様な冷却水通路３を形成して、複数のエアクーラ（１００、１００ａ、１００ｂ等）について後端部の一部を除いて同一寸法に形成され、共用可能となっている。１１は前記ケース１の後端部に設けられた接続用の開口部を覆蓋するためのカバーである。
このように構成すれば、複数の（１００、１００ａ、１００ｂ等）について、ケース１の内部に冷却水通路３を形成して該ケース１を共用可能にしたので、該ケース１を含むエアクーラ部品の互換性が向上するとともに部品アイテム数が減少する。
【００３０】
【発明の効果】
以上記載の如く本発明によれば、上流側エアクーラのケース内に下流側に位置するエアクーラへの冷却水通路を設けて、該上流側エアクーラの冷却用エレメントへの通路とともに前記下流側エアクーラへの冷却水通路を冷却水入口管及び冷却水出口管を接続したので、複数のエアクーラの冷却水通路を全てケース内に形成することにより、エアクーラケースの外側を通す冷却水配管が不要となり、エアクーラ冷却水配管を簡単化できて、狭隘なスペースであっても冷却水配管作業を容易に行うことができ、従来技術に比べて冷却水配管の作業工数を大幅に低減できる。
【００３１】
また、エアクーラケースの外側を通す冷却水配管が不要となることにより、従来技術に比べて冷却水配管部品数を減少することができて、エアクーラの組立コスト及び部品コストを低減することができる。
さらに請求項３のように構成すれば、複数のエアクーラケースの内部に冷却水通路を夫々形成し、該複数のエアクーラケースを共通に構成したので、エアクーラ部品の互換性が向上するとともに部品アイテム数が減少する。
【図面の簡単な説明】
【図１】本発明の実施例に係るディーゼル機関用エアクーラの平面構成図である。
【図２】図１のＡ―Ａ線断面図である。
【図３】図１のＢ―Ｂ矢視図である。
【図４】前記実施例における斜視構成図である。
【図５】前記実施例におけるエアクーラの配置態様を示す平面構成図である。
【図６】本発明が適用されるエアクーラを装備したＶ型ディーゼル機関の断面図である。
【図７】従来技術を示す図１対応図である。
【図８】従来技術を示す図４対応図である。
【符号の説明】
１　　ケース
１ａ　　ケース外壁
１ｂ　　ケース内壁
２　　冷却用エレメント
３　　冷却水通路
４　　空気通路
５　　接続管
６　　冷却水入口管
７　　冷却水出口管
１００、１００ａ、１００ｂ　エアクーラ
１０１　給気管
２００　エンジン
２０１　クランクケース
２０２　シリンダヘッド[0001]
BACKGROUND OF THE INVENTION
INDUSTRIAL APPLICABILITY The present invention is applied to a V-type diesel engine, a multi-cylinder serial type diesel engine, etc. Related to institutions.
[0002]
[Prior art]
In a V-type diesel engine or a multi-cylinder in-line type diesel engine, when installing multiple air coolers that cool the air to the engine with cooling water, supply between the cylinders (cylinders) in the longitudinal direction (axial direction) of the engine. In order to keep the air temperature constant, a plurality of air coolers are arranged in parallel to the air flow in the air supply passage so that the cooling water flows uniformly to each air cooler.
[0003]
7 and 8 schematically show an example of a diesel engine in which a plurality of air coolers are arranged in parallel to the air flow in the air supply passage. FIG. 7 is a plan view of the air cooler. FIG.
7 to 8, reference numerals 100 and 100a denote air coolers. In this example, two air coolers 100 (100, 100a) are arranged in parallel in the longitudinal direction (axial direction) of the engine and are arranged in parallel to the air flow. The cooling water is allowed to flow uniformly through 100 and 100a.
In the air cooler 100, 01 is a case, 2 is a cooling element housed in the case 01, and 4 is an air passage that is a flow path of air that flows through the cooling element 2. The air from the air flows through the cooling element 2 through the air passage 4 in a direction perpendicular to the paper surface.
[0004]
Reference numeral 06 denotes a cooling water inlet pipe, and 07 denotes a cooling water outlet pipe. The cooling water inlet pipe 06 and the cooling water outlet pipe 07 are connected to the cooling water header 2 a of the cooling element 2 in the upstream air cooler 100. Reference numerals 20 and 05 denote cooling water connecting pipes to the downstream air cooler 100a, which connect the cooling water header 2a of the cooling element 2 to the cooling water inlet pipe 06 and the cooling water outlet pipe 07 in the downstream air cooler 100a. ing.
[0005]
In the diesel engine having the air cooler having such a configuration, the cooling water flows from the cooling water inlet pipe 06 into the cooling water header 2a of the cooling element 2 in the upstream air cooler 100, and the cooling water connecting pipe 20 on one side, 05 and flows into the cooling water header 2a of the cooling element 2 in the downstream air cooler 100a.
Then, the cooling water flows in the cooling element 2 in the upstream air cooler 100 and in the cooling element 2 in the downstream air cooler 100a, and the cooling element 2 is made to pass through the cooling element 2 by the respective cooling elements 2. The air is cooled by exchanging heat with air from a supercharger (not shown) flowing in a direction perpendicular to the air.
[0006]
The cooling water that has cooled the air in the cooling element 2 of the upstream air cooler 100 flows out to the cooling water outlet pipe 07 through the cooling water header 2a, and cools the air in the cooling element 2 of the downstream air cooler 100a. The cooled water enters the cooling water connection pipes 05 and 20 through the cooling water header 2a, enters the cooling water outlet pipe 07 from the cooling water connection pipe 20, and merges with the cooling water from the upstream air cooler 100. .
[0007]
[Problems to be solved by the invention]
In both the V-type internal combustion engine and the multi-cylinder in-line internal combustion engine, when a plurality of air coolers 100, 100a are arranged in the front-rear direction of the engine, the space on the side of the air coolers 100, 100a is extremely small.
However, in the related art shown in FIGS. 7 to 8, a plurality (two in this example) of air coolers 100 and 100 a are arranged in parallel in the front-rear direction of the engine with respect to the air flow, and each air cooler 100 is arranged. As the cooling water flows uniformly to 100a, the outside of the case 01 in the upstream air cooler 100 passes between the downstream air cooler 100a and the cooling water inlet pipe 06 and the cooling water outlet pipe 07. The cooling water connecting pipe 20 is connected.
[0008]
For this reason, in this prior art, as described above, the cooling water connection pipe 20 that connects the downstream air cooler 100a, the cooling water inlet pipe 06, and the cooling water outlet pipe 07 passes through the outside of the case 01. Therefore, the piping work of the cooling water connection pipe 20 in a narrow space becomes difficult, and a great number of man-hours are required for the cooling water piping work of the air cooler.
In addition, since the cooling water connecting pipe 20 that passes through the outside of the case 01 is provided, the number of cooling water piping parts increases and the part cost increases.
And so on.
[0009]
SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art, and in an internal combustion engine in which a plurality of air coolers are arranged in the front-rear direction of the engine, the cooling water piping of the plurality of air coolers is simplified to facilitate the cooling water piping work in a narrow space. The purpose of the present invention is to reduce the number of piping work man-hours and reduce the number of cooling water piping parts to reduce the cost of cooling water piping parts.
[0010]
[Means for Solving the Problems]
In order to solve such a problem, the present invention provides a first aspect of the present invention by exchanging heat between the air to the engine flowing through the case and the cooling water by a cooling element installed in the case. In an internal combustion engine in which a plurality of air coolers for cooling the engine are arranged in parallel to the air flow in the air supply passage of the engine, the air cooler is disposed inside the case of the upstream air cooler located upstream of the cooling water flow in the air cooler. Forming a cooling water passage through which cooling water flows to the downstream air cooler located further downstream than the cooling air inlet pipe and the cooling water outlet pipe in the cooling element and cooling water passage of the uppermost air cooler. An internal combustion engine having a plurality of air coolers characterized by being connected is proposed.
[0011]
In Claim 1, it is preferable to configure as in Claim 2 and Claim 3.
That is, according to a second aspect of the present invention, the cooling water passage is formed on both sides of the air passage in which the cooling element inside the case is accommodated via the partition walls.
[0012]
According to a third aspect of the present invention, the cases of the plurality of air coolers are configured in common, and the cooling water passages formed in the cases are connected by connecting pipes.
[0013]
According to this invention, a cooling water passage to the air cooler located downstream is provided in the case of the upstream air cooler of the cooling water flow, and the downstream side provided in the case together with the passage to the cooling element of the upstream air cooler. Since the cooling water passage to the air cooler is connected to the cooling water inlet pipe and the cooling water outlet pipe, the cooling water piping that passes the outside of the air cooler case is unnecessary by forming all the cooling water passages of the plurality of air coolers inside the case. It becomes.
[0014]
This makes it possible to simplify the air cooler cooling water piping compared to the conventional technology where the cooling water connecting pipe is passed outside the air cooler case, and the cooling water piping work can be easily performed even in a narrow space. Therefore, the number of man-hours for cooling water piping can be greatly reduced compared to the prior art.
[0015]
In addition, the cooling water piping that passes the outside of the air cooler case as in the prior art is not required, so that the number of cooling water piping parts can be reduced compared to the conventional technology, and the assembly cost and component cost of the air cooler can be reduced. Can be reduced.
According to the third aspect of the present invention, since the cooling water passages are respectively formed in the plurality of air cooler cases and the plurality of air cooler cases are configured in common, the compatibility of the air cooler parts is improved and the parts The number of items decreases.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.
[0017]
1 is a plan view of a diesel engine air cooler according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, FIG. 3 is a view taken along the line BB in FIG. FIG. FIG. 5 is a plan view showing the arrangement of the air cooler in the embodiment. FIG. 6 is a cross-sectional view of a V-type diesel engine equipped with an air cooler to which the present invention is applied.
[0018]
In FIG. 6 showing a V-type diesel engine to which the present invention is applied, 200 is an engine (V-type diesel engine), 201 is a crankcase, 201a is an engine center, and 202 is fixed on a V bank of the crankcase 201. It is a cylinder head.
A plurality of air coolers 100 are installed between the cylinder heads 202 in the longitudinal direction of the engine (crankshaft direction), and 2 is a cooling element for the air cooler 100. An air supply pipe 101 connects an air outlet of a supercharger (not shown) and the air cooler 100.
[0019]
The present invention relates to the structure of a plurality of air coolers installed in the longitudinal direction of the engine as described above.
1 to 4 showing an embodiment of the present invention, reference numeral 100 denotes an upstream air cooler disposed upstream of the cooling water flow, and 100a denotes a downstream air cooler. In this example, the air coolers 100 and 100a are arranged in the longitudinal direction of the engine. That is, two in the crankshaft direction are arranged in parallel to the air flow as shown in FIGS. 2 to 3 so that the cooling water flows uniformly to the air coolers 100 and 100a.
[0020]
In the air coolers 100 and 100a, 1 is a case, 2 is a cooling element housed in the case 1, 4 is an air passage which is a flow path of air passing through the cooling element 2, and is a supercharger The air from (omitted) flows through the cooling element 2 through the air passage 4 in a direction perpendicular to the paper surface.
[0021]
6 is a cooling water inlet pipe, and 7 is a cooling water outlet pipe. The cooling water inlet pipe 6 and the cooling water outlet pipe 7 are formed of a cooling water inlet 7a formed with a cooling water inlet flange 12 and a cooling water outlet flange 8, respectively. And the cooling water outlet portion 8a is connected to the cooling water header portion 2a of the cooling element 2 in the upstream air cooler 100.
Reference numeral 3 denotes a cooling water passage formed inside the upstream air cooler 100. As shown in FIG. 2, a case outer wall 1a and a case inner wall are provided on both sides of the air passage 4 in which the cooling element 2 in the case 1 is accommodated. It is surrounded by 1b.
[0022]
The cooling water passage 3 is connected to the cooling water passage to the cooling water header portion 2 a of the upstream air cooler 100 inside the upstream air cooler 100.
Reference numeral 5 denotes a connecting pipe that connects a downstream end portion of the cooling water passage 3 formed in the upstream air cooler 100 and a cooling water header portion 2 a of the downstream air cooler 100 a via a connecting pipe flange 10.
[0023]
In the diesel engine having the air cooler having such a configuration, the cooling water flows from the cooling water inlet pipe 6 into the cooling water header portion 2 a of the cooling element 2 in the upstream air cooler 100. At the same time, the cooling water passes through one side (inlet side) of the cooling water passage 3 formed in the case 1 of the upstream air cooler 100, passes through the connecting pipe 5, and the cooling water header 2a of the cooling element 2 in the downstream air cooler 100a. Flow into.
[0024]
The cooling water flows in the cooling element 2 in the upstream air cooler 100 and in the cooling element 2 in the downstream air cooler 100a, and the cooling element 2 in each cooling element 2 is perpendicular to the paper surface. The air is cooled by exchanging heat with air from a supercharger (not shown) flowing through the air.
[0025]
The cooling water that has cooled the air in the cooling element 2 of the upstream air cooler 100 flows out to the cooling water outlet pipe 7 through the cooling water header portion 2a. The cooling water that has cooled the air in the cooling element 2 of the downstream air cooler 100a passes through the cooling water header 2a, and the other side (outlet side) of the cooling water passage 3 formed in the case 1 of the upstream air cooler 100. , Enters the cooling water outlet pipe 7, merges with the cooling water from the upstream air cooler 100, and is discharged out of the system.
[0026]
According to this embodiment, the cooling water passage 3 connected to the downstream air cooler 100a is provided in the case 1 of the upstream air cooler 100 of the cooling water flow among the plurality of air coolers provided in parallel with the air flow. The cooling water passage 3 to the downstream air cooler 100a provided in the case 1 of the upstream air cooler 100 together with the cooling water passage to the cooling water header portion 2a of the upstream air cooler 100 is connected to the cooling water inlet pipe 6 and the cooling water outlet. Since all the cooling water passages 3 of the plurality of air coolers can be formed in the case 1 because they are connected to the pipe 7, the cooling water piping that passes outside the case 01 of the air cooler as shown in FIGS. 05 and 20 become unnecessary.
[0027]
Thereby, the air cooler cooling water piping can be made compact and simple as compared with the case where the cooling water connecting pipe is passed through the outside of the air cooler case as in the prior art. Therefore, since there is no cooling water piping through the outside of the air cooler case, the cooling water piping work can be performed easily and with less work man-hours even in a confined space. The number can be reduced.
[0028]
Moreover, as shown in FIG. 5, the case of the several air cooler arrange | positioned in parallel with the airflow is comprised in common.
5A shows a case where one air cooler 100 is installed, FIGS. 5B and 5C relate to the present invention, and FIG. 5B shows two air coolers (100, 100a) for the air flow. ) When arranged in parallel, (C) shows a case where three air coolers (100, 100a, 100b) are arranged in parallel to the air flow.
[0029]
In FIG. 5, 1 is an air cooler case, in which a cooling water passage 3 similar to that of the embodiment of FIGS. 1 to 4 is formed, and a plurality of air coolers (100, 100a, 100b, etc.) It is formed in the same dimension except for the part and can be shared. Reference numeral 11 denotes a cover for covering the connection opening provided at the rear end of the case 1.
With this configuration, since the cooling water passage 3 is formed inside the case 1 so that the case 1 can be shared for a plurality (100, 100a, 100b, etc.), the air cooler component including the case 1 can be used. Compatibility is improved and the number of parts items is reduced.
[0030]
【The invention's effect】
As described above, according to the present invention, a cooling water passage to the air cooler located downstream is provided in the case of the upstream air cooler, and the passage to the cooling element of the upstream air cooler is connected to the downstream air cooler. Since the cooling water inlet pipe and the cooling water outlet pipe are connected to the cooling water passage, all the cooling water passages of the plurality of air coolers are formed in the case, thereby eliminating the need for cooling water piping through the outside of the air cooler case. The cooling water piping can be simplified, the cooling water piping work can be easily performed even in a narrow space, and the number of work steps of the cooling water piping can be greatly reduced as compared with the prior art.
[0031]
In addition, since the cooling water piping that passes the outside of the air cooler case becomes unnecessary, the number of cooling water piping components can be reduced as compared with the prior art, and the assembly cost and the component cost of the air cooler can be reduced. .
According to the third aspect of the present invention, since the cooling water passages are respectively formed in the plurality of air cooler cases and the plurality of air cooler cases are configured in common, the compatibility of the air cooler parts is improved and the parts The number of items decreases.
[Brief description of the drawings]
FIG. 1 is a plan configuration diagram of an air cooler for a diesel engine according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a view taken along the line BB in FIG. 1;
FIG. 4 is a perspective configuration diagram in the embodiment.
FIG. 5 is a plan view showing the arrangement of air coolers in the embodiment.
FIG. 6 is a cross-sectional view of a V-type diesel engine equipped with an air cooler to which the present invention is applied.
FIG. 7 is a diagram corresponding to FIG.
FIG. 8 is a diagram corresponding to FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Case 1a Case outer wall 1b Case inner wall 2 Cooling element 3 Cooling water passage 4 Air passage 5 Connection pipe 6 Cooling water inlet pipe 7 Cooling water outlet pipe 100, 100a, 100b Air cooler 101 Supply pipe 200 Engine 201 Crankcase 202 Cylinder head

Claims (3)

ケース内に設置された冷却用エレメントにて該ケース内を流過する機関への空気と冷却水とを熱交換して該空気を冷却するエアクーラを前記機関の給気通路に空気流に対して並列に複数個配設してなる内燃機関において、前記エアクーラのうち冷却水流の上流側に位置する上流側エアクーラのケース内部にこれよりも下流側に位置する下流側エアクーラへの冷却水が通流する冷却水通路を形成するとともに、最上流側のエアクーラの冷却用エレメント及び冷却水通路に冷却水入口管及び冷却水出口管を接続したことを特徴とする複数のエアクーラを備えた内燃機関。An air cooler that cools the air by exchanging heat between the air to the engine flowing through the case and the cooling water by a cooling element installed in the case is provided in the air supply passage of the engine against the air flow. In an internal combustion engine having a plurality of parallel arrangements, cooling water flows to a downstream air cooler located downstream from the inside of the case of the upstream air cooler located upstream of the cooling water flow among the air coolers. An internal combustion engine comprising a plurality of air coolers, wherein a cooling water passage is formed and a cooling water inlet pipe and a cooling water outlet pipe are connected to the cooling element and the cooling water passage of the air cooler on the most upstream side. 前記冷却水通路は、前記ケース内部の冷却用エレメントが収納される空気通路の両側に隔壁を介して形成されてなることを特徴とする請求項１に記載の複数のエアクーラを備えた内燃機関。2. The internal combustion engine having a plurality of air coolers according to claim 1, wherein the cooling water passage is formed on both sides of an air passage in which a cooling element inside the case is accommodated via a partition wall. 前記複数のエアクーラのケースを共通に構成し、各ケースに形成された前記冷却水通路を接続管路により接続してなることを特徴とする請求項１に記載の複数のエアクーラを備えた内燃機関。The internal combustion engine having a plurality of air coolers according to claim 1, wherein the plurality of air cooler cases are configured in common, and the cooling water passages formed in each case are connected by a connecting pipe. .
JP2002182731A 2002-06-24 2002-06-24 Internal combustion engine with multiple air coolers Expired - Fee Related JP4274746B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6910469B2 (en) * 2002-01-17 2005-06-28 Wartsila Technology Oy Ab Inlet air arrangement for piston engine
WO2008104402A1 (en) * 2007-02-28 2008-09-04 Behr Gmbh & Co.Kg Charge-air cooling device, system for turbocharging and/or charge-air cooling, method for charge-air cooling
WO2008104373A1 (en) * 2007-02-28 2008-09-04 Behr Gmbh & Co. Kg Charge-air cooling device, system for turbocharging and/or charge-air cooling, method for charge-air cooling
WO2009156572A1 (en) * 2008-06-26 2009-12-30 Wärtsilä Finland Oy Combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6910469B2 (en) * 2002-01-17 2005-06-28 Wartsila Technology Oy Ab Inlet air arrangement for piston engine
WO2008104402A1 (en) * 2007-02-28 2008-09-04 Behr Gmbh & Co.Kg Charge-air cooling device, system for turbocharging and/or charge-air cooling, method for charge-air cooling
WO2008104373A1 (en) * 2007-02-28 2008-09-04 Behr Gmbh & Co. Kg Charge-air cooling device, system for turbocharging and/or charge-air cooling, method for charge-air cooling
WO2009156572A1 (en) * 2008-06-26 2009-12-30 Wärtsilä Finland Oy Combustion engine

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