JP2005036714A - Cooling water pipe connection structure in engine - Google Patents

Cooling water pipe connection structure in engine Download PDF

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JP2005036714A
JP2005036714A JP2003274249A JP2003274249A JP2005036714A JP 2005036714 A JP2005036714 A JP 2005036714A JP 2003274249 A JP2003274249 A JP 2003274249A JP 2003274249 A JP2003274249 A JP 2003274249A JP 2005036714 A JP2005036714 A JP 2005036714A
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cooling water
circulation circuit
engine
water circulation
water
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Tomio Dobashi
富生 土橋
Kenji Tsukahara
健治 塚原
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP2003274249A priority Critical patent/JP2005036714A/en
Priority to CNB2004100709122A priority patent/CN100432386C/en
Publication of JP2005036714A publication Critical patent/JP2005036714A/en
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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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  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To connect parts forming a cooling water circulation circuit to each other while increasing a space efficiency in an engine in which the cooling water circulation circuit including a water-cooled jacket formed in an engine body is formed. <P>SOLUTION: This engine is formed in such a manner that an inlet side connection pipe 23 installed at an auxiliary device 18 forming a part of the cooling water circulation circuit 19 is directly connected to a cooling water supply part 5 partly forming the other part of the cooling water circulation circuit 19 by supplying cooling water to the auxiliary device 18. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、エンジン本体に設けられる水冷ジャケットを含んで冷却水循環回路が構成されるエンジンに関し、特に、冷却水循環回路を構成する部品相互の配管接続構造の改良に関する。   The present invention relates to an engine in which a cooling water circulation circuit is configured including a water cooling jacket provided in an engine body, and more particularly, to an improvement in a piping connection structure between components constituting the cooling water circulation circuit.

車両搭載エンジンでは、そのエンジン本体を冷却するためにエンジン本体に水冷ジャケットが設けられるとともに、部品保護や排ガス性状向上のために、エンジンオイルクーラー、空気供給量制御用部品、水冷式ターボチャージャー等の補機にも冷却水を循環させており、最近のディーゼルエンジンではＥＧＲクーラー等の補機にも冷却水を循環させている（たとえば特許文献１参照。）。
特開２０００−３４９２６１号公報 In a vehicle-mounted engine, a water-cooling jacket is provided on the engine body to cool the engine body, and engine oil coolers, air supply control parts, water-cooled turbochargers, etc. are used to protect parts and improve exhaust gas properties. Cooling water is also circulated through the auxiliary machines, and in recent diesel engines, cooling water is also circulated through auxiliary machines such as an EGR cooler (see, for example, Patent Document 1).
JP 2000-349261 A

ところが、冷却水循環回路を構成する部品同士はホースで接続されるのが一般的である。しかるにホースを用いた接続では、各部品に設けられるジョイントや、ホース自体を設置するためのスペースが必要であるが、最近の車両では、車両デザイン、衝突ストロークを確保するためのスペース確保、冷却水循環回路を構成する部品の増加等の理由により、前記ジョイントやホースの配置スペースを確保することが困難になってきている。   However, the parts constituting the cooling water circulation circuit are generally connected by a hose. However, the connection using a hose requires a space for installing the joint provided on each part and the hose itself. However, in recent vehicles, the vehicle design, the space to ensure the collision stroke, the cooling water circulation For reasons such as an increase in the number of parts constituting the circuit, it has become difficult to secure an arrangement space for the joint and hose.

本発明は、かかる事情に鑑みてなされたものであり、スペース効率の向上を図りつつ、冷却水循環回路を構成する部品同士の接続を可能としたエンジンにおける冷却水配管接続構造を提供することを目的とする。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a cooling water pipe connection structure in an engine that enables connection of components constituting a cooling water circulation circuit while improving space efficiency. And

上記目的を達成するために、本発明は、エンジン本体に設けられる水冷ジャケットを含んで冷却水循環回路が構成されるエンジンにおいて、前記冷却水循環回路の一部を構成する補機に設けられる入口側接続管が、該補機に冷却水を供給するようにして前記冷却水循環回路の他の一部を構成する冷却水供給元部品に直接接続されることを特徴とする。   In order to achieve the above object, the present invention provides an engine having a cooling water circulation circuit including a water cooling jacket provided in an engine body, and an inlet side connection provided in an auxiliary machine constituting a part of the cooling water circulation circuit. The pipe is directly connected to a cooling water supply source component constituting another part of the cooling water circulation circuit so as to supply cooling water to the auxiliary machine.

このような構成によれば、冷却水循環回路の一部を構成する補機と、その補機に冷却水を供給する冷却水供給元部品との間にはホースを配置するスペースを確保する必要がなく、しかもジョイントを配置するスペースを確保する必要もない。したがって部品点数の低減を図るとともにスペース効率の向上を図りつつ、冷却水循環回路を構成する部品同士の接続が可能となる。   According to such a configuration, it is necessary to secure a space for arranging the hose between the auxiliary machine constituting a part of the cooling water circulation circuit and the cooling water supply source component that supplies the auxiliary water with the cooling water. In addition, it is not necessary to secure a space for arranging the joint. Therefore, it is possible to connect the components constituting the cooling water circulation circuit while reducing the number of components and improving the space efficiency.

以下、本発明の実施の形態を、添付の図面に示した本発明の一実施例に基づいて説明する。   DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.

図１〜図３は本発明の一実施例を示すものであり、図１はサーモスタットが開いた状態でのエンジンの冷却水循環回路の全体図、図２はエンジン本体の一部側面図、図３は図２の３−３線断面図である。   1 to 3 show an embodiment of the present invention. FIG. 1 is an overall view of an engine coolant circulation circuit in a state where a thermostat is opened. FIG. 2 is a partial side view of an engine body. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG.

先ず図１において、エンジンたとえば多気筒のディーゼルエンジンのエンジン本体５は、シリンダブロック６と、該シリンダブロック６に結合されるシリンダヘッド７とを備え、シリンダブロック６およびシリンダヘッド７には、エンジン本体５を冷却するための水冷ジャケット８が設けられる。しかも前記水冷ジャケット８において冷却水はシリンダヘッド７側からシリンダブロック６側に流通する。   1, an engine body 5 of an engine, for example, a multi-cylinder diesel engine, includes a cylinder block 6 and a cylinder head 7 coupled to the cylinder block 6. The cylinder block 6 and the cylinder head 7 include an engine body. A water cooling jacket 8 for cooling 5 is provided. Moreover, in the water cooling jacket 8, the cooling water flows from the cylinder head 7 side to the cylinder block 6 side.

水冷ジャケット８、ラジエータ９、サーモスタット１０および水ポンプ１１は第１の冷却水循環回路１２を構成しており、エンジンの暖機状態でサーモスタット１０が開いているときには、水ポンプ１１の作動に応じて、シリンダブロック６側の水冷ジャケット８から導出される冷却水はラジエータ９、サーモスタット１０および水ポンプ１１を経てシリンダヘッド７側の水冷ジャケット８に戻される。しかもシリンダブロック６には、水ポンプ１１と、シリンダヘッド７側の水冷ジャケット８とを結ぶ冷却水通路１３が設けられており、前記水ポンプ１１はシリンダブロック６に接続される。   The water cooling jacket 8, the radiator 9, the thermostat 10 and the water pump 11 constitute a first cooling water circulation circuit 12. When the thermostat 10 is open in a warm-up state of the engine, according to the operation of the water pump 11, The cooling water led out from the water cooling jacket 8 on the cylinder block 6 side is returned to the water cooling jacket 8 on the cylinder head 7 side through the radiator 9, the thermostat 10 and the water pump 11. Moreover, the cylinder block 6 is provided with a cooling water passage 13 that connects the water pump 11 and the water cooling jacket 8 on the cylinder head 7 side, and the water pump 11 is connected to the cylinder block 6.

また水冷ジャケット８、ヒータコア１４、サーモスタット１０および水ポンプ１１は第２の冷却水循環回路１５を構成するものであり、サーモスタット１０が開いているときには、水ポンプ１１の作動に応じて、シリンダヘッド７側の水冷ジャケット８から導出される冷却水はヒータコア１４、サーモスタット１０、水ポンプ１１および冷却水通路１３を経てシリンダヘッド７側の水冷ジャケット８に戻される。   The water cooling jacket 8, the heater core 14, the thermostat 10 and the water pump 11 constitute a second cooling water circulation circuit 15. When the thermostat 10 is open, the cylinder head 7 side is operated according to the operation of the water pump 11. The cooling water led out from the water cooling jacket 8 is returned to the water cooling jacket 8 on the cylinder head 7 side through the heater core 14, the thermostat 10, the water pump 11 and the cooling water passage 13.

またターボチャージャー１６が、水冷ジャケット８、サーモスタット１０および水ポンプ１１とともに第３の冷却水循環回路１７を構成するようにして前記ヒータコア１４に並列に接続されており、ＥＧＲクーラー１８が、水冷ジャケット８、サーモスタット１０および水ポンプ１１とともに第４の冷却水循環回路１９を構成するようにして、前記ヒータコア１４に並列に接続される。またシリンダヘッド７側の水冷ジャケット８で生じたエアはエア抜きチューブ２０を介して膨張タンク２１に接続されており、膨張タンク２１からの水はラジエータ９およびサーモスタット１０間に戻される。さらに水ポンプ１１の吐出口および吸入口間にはオイルクーラー２２が接続される。   A turbocharger 16 is connected in parallel to the heater core 14 so as to form a third cooling water circulation circuit 17 together with the water cooling jacket 8, the thermostat 10 and the water pump 11, and the EGR cooler 18 is connected to the water cooling jacket 8, The fourth cooling water circulation circuit 19 is configured together with the thermostat 10 and the water pump 11 so as to be connected in parallel to the heater core 14. Air generated in the water cooling jacket 8 on the cylinder head 7 side is connected to an expansion tank 21 via an air vent tube 20, and water from the expansion tank 21 is returned between the radiator 9 and the thermostat 10. Further, an oil cooler 22 is connected between the discharge port and the suction port of the water pump 11.

このような冷却水循環回路構成において、エンジンが暖機状態に至らず、サーモスタット１０が閉じているときには、第１の冷却水循環回路１２が遮断されており、冷却水がラジエータ９側に流通することはない。   In such a cooling water circulation circuit configuration, when the engine does not reach a warm-up state and the thermostat 10 is closed, the first cooling water circulation circuit 12 is shut off, and the cooling water flows to the radiator 9 side. Absent.

図２および図３において、エンジン本体５の水冷ジャケット８を含んで構成される第４の冷却水循環回路１９において、第４の冷却水循環回路１９の一部を構成する補機であるＥＧＲクーラー１８には、該ＥＧＲクーラー１８に冷却水を供給するようにして第４の冷却水循環回路１９の他の一部を構成する冷却水供給元部品であるエンジン本体５のシリンダブロック６側に向けて延びる入口側接続管２３が設けられており、前記シリンダブロック６の側面に一対のボルト２４，２５でＥＧＲクーラー１８が取り付けられた状態で、前記入口側接続管２３がシリンダブロック６に直接接続される。   2 and 3, in the fourth cooling water circulation circuit 19 configured to include the water cooling jacket 8 of the engine body 5, an EGR cooler 18, which is an auxiliary device constituting a part of the fourth cooling water circulation circuit 19, is provided. Is an inlet that extends toward the cylinder block 6 side of the engine body 5 that is a cooling water supply source component that constitutes another part of the fourth cooling water circulation circuit 19 so as to supply cooling water to the EGR cooler 18. A side connection pipe 23 is provided, and the inlet side connection pipe 23 is directly connected to the cylinder block 6 in a state where the EGR cooler 18 is attached to a side surface of the cylinder block 6 with a pair of bolts 24 and 25.

シリンダブロック６には、水冷ジャケット８のシリンダヘッド７側の部分に通じる冷却水通路２６が設けられるとともに、該冷却水通路２６に通じるようにしてシリンダブロック６の側壁から突出する円筒状の接続管部６ａが設けられており、シリンダブロック６に取り付けられるＥＧＲクーラー１８の入口側接続管２３は、前記冷却水通路２６に通じるようにして接続管部２６ａに嵌入される。   The cylinder block 6 is provided with a cooling water passage 26 that communicates with a portion of the water cooling jacket 8 on the cylinder head 7 side, and a cylindrical connecting pipe that projects from the side wall of the cylinder block 6 so as to communicate with the cooling water passage 26. A portion 6 a is provided, and the inlet side connection pipe 23 of the EGR cooler 18 attached to the cylinder block 6 is fitted into the connection pipe portion 26 a so as to communicate with the cooling water passage 26.

しかも入口側接続管２３の外周には接続管部６ａの内周に弾発的に接触する環状のシール部材２７が装着されるものであり、該シール部材２７は、入口側接続管２３の先端に設けられて外側方に張り出す鍔部２３ａと、入口側接続管部２３の中間部に設けられて外側方に張り出す鍔部２３ｂとの間に挟持される。   In addition, an annular seal member 27 that elastically contacts the inner periphery of the connection pipe portion 6 a is attached to the outer periphery of the inlet side connection pipe 23, and the seal member 27 is the tip of the inlet side connection pipe 23. And is sandwiched between a flange portion 23a that protrudes outward and the flange portion 23b that is provided in an intermediate portion of the inlet side connection pipe portion 23 and extends outward.

而して水冷ジャケット８内の冷却水の一部は、シリンダブロック６側からシリンダヘッド７側に流通し、さらに反転して冷却水通路２６から入口側接続管２３側に流れることになり、そのように冷却水が流通する部分で冷却水の温度を検出するために、水温センサ２８が水冷ジャケット８から冷却水通路２６への流通反転部分に対応してシリンダヘッド７に取り付けられる。   Thus, a part of the cooling water in the water cooling jacket 8 flows from the cylinder block 6 side to the cylinder head 7 side, further reverses and flows from the cooling water passage 26 to the inlet side connecting pipe 23 side. Thus, in order to detect the temperature of the cooling water at the portion where the cooling water flows, the water temperature sensor 28 is attached to the cylinder head 7 corresponding to the flow reversal portion from the water cooling jacket 8 to the cooling water passage 26.

またＥＧＲクーラー１８に設けられた出口側接続管２９にはホース３０の一端が接続されており、ヒータコア１４およびサーモスタット１０間を結ぶ管路３１（図１参照）に、前記ホース３０の他端が接続される。   One end of the hose 30 is connected to the outlet side connecting pipe 29 provided in the EGR cooler 18, and the other end of the hose 30 is connected to a pipe line 31 (see FIG. 1) connecting the heater core 14 and the thermostat 10. Connected.

次にこの実施例の作用について説明すると、エンジン本体５の水冷ジャケット８を含んで構成される第４の冷却水循環回路１９の一部を構成するＥＧＲクーラー１８には入口側接続管２３が設けられており、ＥＧＲクーラー１８に冷却水を供給するようにして第４の冷却水循環回路１９の他の一部を構成するエンジン本体５のシリンダブロック６に、前記入口側接続管２３が水冷ジャケット８に通じるようにして直接接続される。   Next, the operation of this embodiment will be described. The EGR cooler 18 constituting a part of the fourth cooling water circulation circuit 19 including the water cooling jacket 8 of the engine body 5 is provided with an inlet side connecting pipe 23. The inlet side connecting pipe 23 is connected to the water cooling jacket 8 in the cylinder block 6 of the engine body 5 constituting another part of the fourth cooling water circulation circuit 19 so as to supply cooling water to the EGR cooler 18. It is connected directly so as to communicate.

したがって第４の冷却水循環回路１９の一部を構成するＥＧＲクーラー１８と、エンジン本体５のシリンダブロック６との間にはホースを配置するスペースを確保する必要がなく、しかもジョイントを配置するスペースを確保する必要もないので、部品点数の低減を図るとともにスペース効率の向上を図りつつ、第４の冷却水循環回路１９を構成するＥＧＲクーラー１８およびエンジン本体５間の接続が可能となる。   Therefore, it is not necessary to secure a space for arranging the hose between the EGR cooler 18 constituting a part of the fourth cooling water circulation circuit 19 and the cylinder block 6 of the engine body 5, and also a space for arranging the joint. Since it is not necessary to ensure, connection between the EGR cooler 18 and the engine main body 5 constituting the fourth cooling water circulation circuit 19 is possible while reducing the number of parts and improving the space efficiency.

以上、本発明の実施例を説明したが、本発明は上記実施例に限定されるものではなく、特許請求の範囲に記載された本発明を逸脱することなく種々の設計変更を行うことが可能である。   Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.

サーモスタットが開いた状態でのエンジンの冷却水循環回路の全体図である。It is a general view of a cooling water circulation circuit of an engine in a state where a thermostat is opened. エンジン本体の一部側面図である。It is a partial side view of an engine body. 図２の３−３線断面図である。FIG. 3 is a sectional view taken along line 3-3 in FIG. 2.

符号の説明Explanation of symbols

５・・・冷却水供給元部品としてのエンジン本体
８・・・水冷ジャケット
１８・・・補機としてのＥＧＲクーラー
２３・・・入口側接続管 5 ... Engine main body 8 as cooling water supply source part ... Water cooling jacket 18 ... EGR cooler 23 as auxiliary machine ... Inlet side connecting pipe

Claims (1)

エンジン本体（５）に設けられる水冷ジャケット（８）を含んで冷却水循環回路（１９）が構成されるエンジンにおいて、前記冷却水循環回路（１９）の一部を構成する補機（１８）に設けられる入口側接続管（２３）が、該補機（１８）に冷却水を供給するようにして前記冷却水循環回路（１９）の他の一部を構成する冷却水供給元部品（５）に直接接続されることを特徴とするエンジンにおける冷却水配管接続構造。   In the engine in which the cooling water circulation circuit (19) is configured including the water cooling jacket (8) provided in the engine main body (5), the cooling water circulation circuit (19) is provided in an auxiliary machine (18) constituting a part of the cooling water circulation circuit (19). The inlet side connecting pipe (23) is directly connected to the cooling water supply source component (5) constituting the other part of the cooling water circulation circuit (19) so as to supply cooling water to the auxiliary machine (18). A cooling water pipe connection structure in an engine.
JP2003274249A 2003-07-14 2003-07-14 Cooling water pipe connection structure in engine Pending JP2005036714A (en)

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JP2003274249A JP2005036714A (en) 2003-07-14 2003-07-14 Cooling water pipe connection structure in engine
CNB2004100709122A CN100432386C (en) 2003-07-14 2004-07-13 Cooling water pipe connecting structure for engine

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011185267A (en) * 2010-03-08 2011-09-22 Audi Ag Cooling circuit of internal combustion engine
JP2021092209A (en) * 2019-12-12 2021-06-17 ヤンマーパワーテクノロジー株式会社 engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4485104B2 (en) * 2001-08-30 2010-06-16 本田技研工業株式会社 Gas-liquid separator for engine cooling system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011185267A (en) * 2010-03-08 2011-09-22 Audi Ag Cooling circuit of internal combustion engine
JP2021092209A (en) * 2019-12-12 2021-06-17 ヤンマーパワーテクノロジー株式会社 engine

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Publication number Publication date
CN1576536A (en) 2005-02-09
CN100432386C (en) 2008-11-12

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