JPH0676622U - Cooling device for internal combustion engine supercharger - Google Patents

Cooling device for internal combustion engine supercharger

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Publication number
JPH0676622U
JPH0676622U JP1738493U JP1738493U JPH0676622U JP H0676622 U JPH0676622 U JP H0676622U JP 1738493 U JP1738493 U JP 1738493U JP 1738493 U JP1738493 U JP 1738493U JP H0676622 U JPH0676622 U JP H0676622U
Authority
JP
Japan
Prior art keywords
cooling water
reservoir tank
pressure
center housing
radiator
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
JP1738493U
Other languages
Japanese (ja)
Inventor
亮三 今井
輝城 長橋
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.)
UD Trucks Corp
Original Assignee
UD Trucks Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UD Trucks Corp filed Critical UD Trucks Corp
Priority to JP1738493U priority Critical patent/JPH0676622U/en
Publication of JPH0676622U publication Critical patent/JPH0676622U/en
Pending legal-status Critical Current

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Abstract

(57)【要約】 【目的】機関停止直後の過給機のセンタハウジング内の
温度上昇を抑制することを目的とする。 【構成】排気ターボ過給機16のセンタハウジング17
内の冷却水通路とウォータポンプ12の吸込口12aと
をリターン通路19により連通し、リターン通路19に
リザーバタンク20を介装する。リザーバタンク20に
は加圧キャップ21を設け、加圧キャップ21には、リ
ザーバタンク20内圧力が所定圧力以上になると開弁し
てリザーバタンク20内圧力を通路22を介してラジエ
ータ11側に逃がす弁を設ける。そして、加圧キャップ
21の弁の開弁圧力を0.7kg/cm2 以下に設定す
る。
(57) [Summary] [Purpose] The purpose is to suppress the temperature rise in the center housing of the turbocharger immediately after the engine is stopped. [Structure] Center housing 17 of exhaust turbocharger 16
A return passage 19 connects the internal cooling water passage and the suction port 12a of the water pump 12, and a reservoir tank 20 is provided in the return passage 19. The reservoir tank 20 is provided with a pressurizing cap 21, and the pressurizing cap 21 opens when the internal pressure of the reservoir tank 20 becomes equal to or higher than a predetermined pressure to allow the internal pressure of the reservoir tank 20 to escape to the radiator 11 side through the passage 22. Provide a valve. Then, the valve opening pressure of the valve of the pressure cap 21 is set to 0.7 kg / cm 2 or less.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial applications]

本考案は、内燃機関用過給機の冷却装置に関し、特に、冷却性能を向上する技 術に関する。 The present invention relates to a cooling device for a supercharger for an internal combustion engine, and more particularly to a technique for improving cooling performance.

【0002】[0002]

【従来の技術】[Prior art]

従来、この種の内燃機関用過給機の冷却装置として図に示すようなものが知ら れている(実開昭63−170526号公報,実開昭63−20271号公報, 及び実公昭64−3786号公報参照)。 即ち、ラジエータ1からの冷却水をウォータポンプ2によりシリンダブロック 3,シリンダヘッド4内の冷却水通路に圧送して機関を冷却した後、再度ラジエ ータ1に戻すようにしている。又、シリンダブロック3の冷却水通路から冷却水 を分流させて排気ターボ過給機5のセンタハウジング内の冷却水通路に導入して 排気ターボ過給機5の軸受部を冷却するようにしている。6はカーヒータコアで ある。 Conventionally, as shown in the figure, a cooling device for a supercharger for an internal combustion engine of this type has been known (Japanese Utility Model Publication No. 63-170526, Japanese Utility Model Publication No. 63-20271, and Japanese Utility Model Publication 64-64). See Japanese Patent No. 3786). That is, the cooling water from the radiator 1 is pumped by the water pump 2 to the cooling water passage in the cylinder block 3 and the cylinder head 4 to cool the engine, and then returned to the radiator 1. Further, the cooling water is branched from the cooling water passage of the cylinder block 3 and introduced into the cooling water passage in the center housing of the exhaust turbo supercharger 5 to cool the bearing portion of the exhaust turbo supercharger 5. . 6 is a car heater core.

【0003】 しかし、この構成では、過給機5のセンタハウジングの位置がラジエータ1の 冷却水面より高い位置にあると、特に、機関停止直後に前記センタハウジング内 の冷却水通路に冷却水が流入しなくなることがあり、過給機の温度が過度に上昇 して焼付が発生する虞がある。 又、従来では、過給機よりも高位置にリザーバタンクを配設し、過給機のベー パをこのリザーバタンクに導入させるようにしたものがある(特開昭60−21 9419号公報参照)。However, in this structure, when the position of the center housing of the supercharger 5 is higher than the cooling water surface of the radiator 1, the cooling water flows into the cooling water passage in the center housing immediately after the engine is stopped. The temperature of the supercharger may rise excessively, and seizure may occur. Further, conventionally, there is one in which a reservoir tank is arranged at a position higher than the supercharger and the vapor of the supercharger is introduced into this reservoir tank (see Japanese Patent Laid-Open No. 60-219419). ).

【0004】 しかし、このものでは、ラジエータの入口部から冷却水をリザーバタンクに導 入させた後過給機の冷却部に導くようにしているため、過給機の冷却効率が悪化 するという不具合がある。 更に、このような従来の問題点を解消する技術として、センタハウジング内の 冷却水通路と連通するリザーバタンクを該センタハウジングより高位置に配置し て設け、該リザーバタンクを加圧キャップを介して前記ラジエータに連通すると 共に、前記リザーバタンクと前記機関冷却水循環系のウォータポンプ吸込口と連 通させ、前記加圧キャップには、リザーバタンク内圧力が所定圧力以上になると 開弁してリザーバタンク内圧力をラジエータ側に逃がす弁を設けたものがある( 実開平3−112523号公報参照)。However, in this structure, the cooling water is introduced from the inlet portion of the radiator into the cooling section of the supercharger after being introduced into the reservoir tank, so that the cooling efficiency of the supercharger is deteriorated. There is. Further, as a technique for solving such a conventional problem, a reservoir tank communicating with the cooling water passage in the center housing is provided at a position higher than the center housing, and the reservoir tank is provided via a pressure cap. It communicates with the radiator and also communicates with the reservoir tank and the water pump suction port of the engine cooling water circulation system, and the pressure cap opens when the pressure in the reservoir tank becomes equal to or higher than a predetermined pressure. There is one provided with a valve that allows pressure to escape to the radiator side (see Japanese Utility Model Laid-Open No. 3-112523).

【0005】[0005]

【考案が解決しようとする課題】[Problems to be solved by the device]

しかし、この技術にあっても、次のような問題点がある。 即ち、前記加圧キャップの弁の開弁圧力が高過ぎると、機関停止直後に弁が開 弁されず、リザーバタンク内のベーパがラジエータ側に逃げないため、センタハ ウジング内の冷却水通路に冷却水が流れ難くなり、過給機の温度が過度に上昇し て焼付が発生する虞があると共に、センタハウジング内がオイルスラッジの発生 温度に達して、オイルスラッジの発生が顕著になるという問題点がある。 However, even this technique has the following problems. That is, if the valve opening pressure of the pressurizing cap is too high, the valve will not open immediately after the engine is stopped and the vapor in the reservoir tank will not escape to the radiator side, so the cooling water passage in the center housing will be cooled. There is a risk that water will not flow easily and the temperature of the turbocharger will rise excessively, which may cause seizure, and that the temperature inside the center housing will reach the temperature at which oil sludge is generated, and the generation of oil sludge will become noticeable. There is.

【0006】 本考案は以上のような従来の問題点に鑑み、機関停止直後の過給機のセンタハ ウジング内の温度上昇を抑制することを目的とする。In view of the above conventional problems, the present invention aims to suppress the temperature rise in the center housing of the supercharger immediately after the engine is stopped.

【0007】[0007]

【課題を解決するための手段】[Means for Solving the Problems]

このため、本考案は、過給機の軸受部を覆うセンタハウジングを、ラジエータ の冷却水面より高位置に配設し、前記ラジエータが介装された機関冷却水循環系 を循環する冷却水の一部を前記センタハウジング内の冷却水通路に導いて前記軸 受部を冷却するようにし、前記センタハウジング内の冷却水通路と連通するリザ ーバタンクを前記センタハウジングより高位置に配置して設け、該リザーバタン クを加圧キャップを介して前記ラジエータに連通すると共に、前記リザーバタン クと前記機関冷却水循環系のウォータポンプ吸込口と連通させ、前記加圧キャッ プには、リザーバタンク内圧力が所定圧力以上になると開弁してリザーバタンク 内圧力をラジエータ側に逃がす弁を設けてなる内燃機関用過給機の冷却装置にお いて、前記加圧キャップの弁の開弁圧力を0.7kg/cm2 以下とした。Therefore, according to the present invention, the center housing that covers the bearing portion of the supercharger is disposed at a position higher than the cooling water surface of the radiator, and a part of the cooling water that circulates in the engine cooling water circulation system in which the radiator is interposed. To the cooling water passage in the center housing to cool the bearing portion, and a reservoir tank communicating with the cooling water passage in the center housing is provided at a position higher than the center housing. A reservoir tank via a pressure cap and a reservoir tank and a water pump suction port of the engine cooling water circulation system so that the pressure inside the reservoir tank exceeds a predetermined pressure. In this case, in the cooling device for the supercharger for an internal combustion engine, which is opened, a valve for releasing the pressure in the reservoir tank to the radiator side is provided. The opening pressure of the valve cap was 0.7 kg / cm 2 or less.

【0008】[0008]

【作用】[Action]

かかる構成において、加圧キャップの弁の開弁圧力が高過ぎると、機関停止直 後の冷却水の流れ悪く、過給機の冷却性が悪いと共に、センタハウジング内にオ イルスラッジ等が発生する。そこで、弁の開弁圧力を所定圧力より低く設定する ことで、リザーバタンク内の圧力が低下して冷却水が流れ易くなり、センタハウ ジング内の冷却性能が高められる。 In such a configuration, if the valve opening pressure of the valve of the pressurizing cap is too high, the flow of cooling water immediately after the engine is stopped is poor, the cooling performance of the supercharger is poor, and oil sludge or the like is generated in the center housing. Therefore, by setting the valve opening pressure to be lower than a predetermined pressure, the pressure in the reservoir tank is reduced, cooling water flows more easily, and the cooling performance in the center housing is improved.

【0009】[0009]

【実施例】【Example】

以下、添付された図面を参照して本考案を詳述する。 図1において、ラジエータ11からの冷却水は、ウォータポンプ12により圧 送されてシリンダブロック13,シリンダヘッド14内の冷却水通路を流通した 後、サーモスタット15を介して再度ラジエータ11に戻される。 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In FIG. 1, the cooling water from the radiator 11 is pumped by the water pump 12, flows through the cooling water passages in the cylinder block 13 and the cylinder head 14, and then is returned to the radiator 11 via the thermostat 15.

【0010】 一方、機関に過給空気を供給する排気ターボ過給機16が設けられている。こ の排気ターボ過給機16には、何れも図示しないコンプレッサとタービンとを軸 結するシャフトが設けられ、このシャフトはセンタハウジング17により覆われ ている。 前記センタハウジング17内には前記シャフトの軸受部を冷却する冷却水の通 路(図示せず)が設けられ、この冷却水通路とシリンダブロック13内の冷却水 通路とが冷却水供給通路18により連通され、シリンダブロック13からセンタ ハウジング17内の冷却水通路に冷却水が供給される。On the other hand, an exhaust turbocharger 16 for supplying supercharged air to the engine is provided. The exhaust turbocharger 16 is provided with a shaft (not shown) that connects a compressor and a turbine, and the shaft is covered with a center housing 17. A cooling water passage (not shown) for cooling the bearing portion of the shaft is provided in the center housing 17, and the cooling water passage and the cooling water passage in the cylinder block 13 are connected by a cooling water supply passage 18. The cooling water is supplied from the cylinder block 13 to the cooling water passage in the center housing 17.

【0011】 前記センタハウジング17内の冷却水通路と前記ウォータポンプ12の吸込口 12aとがリターン通路19により連通され、該リターン通路19にはリザーバ タンク20が介装されている。このリザーバタンク20には加圧キャップ21が 設けられている。この加圧キャップ21には、リザーバタンク20内圧力が所定 圧力以上になると開弁してリザーバタンク20内圧力を通路22を介してラジエ ータ11側に逃がす弁が設けられている。23はラジエータ11に設けられた加 圧キャップである。A cooling water passage in the center housing 17 and a suction port 12 a of the water pump 12 are connected by a return passage 19, and a reservoir tank 20 is interposed in the return passage 19. The reservoir tank 20 is provided with a pressure cap 21. The pressurizing cap 21 is provided with a valve that opens when the internal pressure of the reservoir tank 20 exceeds a predetermined pressure and allows the internal pressure of the reservoir tank 20 to escape to the radiator 11 side through the passage 22. Reference numeral 23 is a pressure cap provided on the radiator 11.

【0012】 ここで、前記加圧キャップ21の弁の開弁圧力は0.7kg/cm2 以下に設 定される。 かかる構成において、センタハウジング17内の冷却水通路にてベーパが発生 すると、このベーパはセンタハウジング17より高位置に配設されたリザーバタ ンク20にリターン通路19を介して流出する。Here, the valve opening pressure of the valve of the pressure cap 21 is set to 0.7 kg / cm 2 or less. In this structure, when vapor is generated in the cooling water passage in the center housing 17, the vapor flows out through the return passage 19 to the reservoir tank 20 arranged at a position higher than the center housing 17.

【0013】 ここで、加圧キャップ21の弁の開弁圧力が高過ぎると、機関停止直後に弁が 開弁されず、リザーバタンク20内のベーパがラジエータ11側に逃げないため 、センタハウジング17内の冷却水通路に冷却水が流れ難くなり、過給機の温度 が過度に上昇して焼付が発生する虞があると共に、センタハウジング17内がオ イルスラッジの発生温度に達して、オイルスラッジの発生が顕著になるという問 題点があるが、上記のように、加圧キャップ21の弁の開弁圧力は0.7kg/ cm2 以下に設定すると、機関停止直後に弁が開弁され、リザーバタンク20内 のベーパがラジエータ11側に逃げるため、センタハウジング17内の冷却水通 路に冷却水が流れ易くなり、過給機の温度が過度に上昇せず、焼付が発生する虞 がなくなると共に、センタハウジング17内がオイルスラッジの発生温度に達せ ず、オイルスラッジの発生を抑制することができる。Here, if the valve opening pressure of the valve of the pressure cap 21 is too high, the valve is not opened immediately after the engine is stopped, and the vapor in the reservoir tank 20 does not escape to the radiator 11 side. It becomes difficult for the cooling water to flow to the cooling water passage inside, and the temperature of the supercharger may rise excessively, which may cause seizure. At the same time, the inside of the center housing 17 reaches the temperature at which oil sludge is generated and oil sludge is generated. However, if the valve opening pressure of the pressurizing cap 21 is set to 0.7 kg / cm 2 or less as described above, the valve is opened immediately after the engine is stopped, Since the vapor in the reservoir tank 20 escapes to the radiator 11 side, the cooling water easily flows through the cooling water passage in the center housing 17, the temperature of the supercharger does not rise excessively, and seizure may occur. With Kunar, the center housing 17 does not reach the generation temperature of the oil sludge, it is possible to suppress the generation of oil sludge.

【0014】 加圧キャップ21の弁の開弁圧力を0.7kg/cm2 以下に設定したことに よる上記作用・効果は本考案者らの実験により明らかにされた。 尚、以上のように、特定の実施例を参照して本考案を説明したが、本考案はこ れに限定されるものではなく、当該技術分野における熟練者等により、本考案に 添付された実用新案登録請求の範囲から逸脱することなく、種々の変更及び修正 が可能であるとの点に留意すべきである。The above-described actions and effects obtained by setting the valve opening pressure of the pressure cap 21 to 0.7 kg / cm 2 or less have been clarified by experiments by the present inventors. As described above, the present invention has been described with reference to the specific embodiments, but the present invention is not limited thereto, and is attached to the present invention by a person skilled in the art. It should be noted that various changes and modifications can be made without departing from the scope of claims for utility model registration.

【0015】[0015]

【考案の効果】[Effect of device]

以上説明したように、本考案の内燃機関用過給機の冷却装置によれば、リザー バタンクに設けられた加圧キャップの弁の開弁圧力を0.7kg/cm2 以下と したから、センタハウジング内の冷却水通路に冷却水が流れ易くなり、過給機の 冷却性を向上できると共に、センタハウジング内のオイルスラッジの発生を抑制 することができる実用的効果大なるものである。As described above, according to the cooling device for a supercharger for an internal combustion engine of the present invention, the valve opening pressure of the valve of the pressure cap provided in the reservoir tank is set to 0.7 kg / cm 2 or less. Cooling water easily flows into the cooling water passage in the housing, the cooling performance of the supercharger can be improved, and the generation of oil sludge in the center housing can be suppressed, which is a great practical effect.

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

【図1】 本考案に係る内燃機関用過給機の冷却装置の
一実施例を示す構成図
FIG. 1 is a configuration diagram showing an embodiment of a cooling device for a supercharger for an internal combustion engine according to the present invention.

【図2】 従来の内燃機関用過給機の冷却装置の一例を
示す構成図
FIG. 2 is a configuration diagram showing an example of a conventional cooling device for a supercharger for an internal combustion engine.

【符号の説明】[Explanation of symbols]

11 ラジエータ 12 ウォータポンプ 13 シリンダブロック 14 シリンダヘッド 16 排気ターボ過給機 17 センタハウジング 18 冷却水供給通路 19 リターン通路 20 リザーバタンク 21 加圧キャップ 11 Radiator 12 Water Pump 13 Cylinder Block 14 Cylinder Head 16 Exhaust Turbocharger 17 Center Housing 18 Cooling Water Supply Passage 19 Return Passage 20 Reservoir Tank 21 Pressure Cap

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】過給機の軸受部を覆うセンタハウジング
を、ラジエータの冷却水面より高位置に配設し、前記ラ
ジエータが介装された機関冷却水循環系を循環する冷却
水の一部を前記センタハウジング内の冷却水通路に導い
て前記軸受部を冷却するようにし、前記センタハウジン
グ内の冷却水通路と連通するリザーバタンクを前記セン
タハウジングより高位置に配置して設け、該リザーバタ
ンクと加圧キャップを介して前記ラジエータに連通する
と共に、前記リザーバタンクを前記機関冷却水循環系の
ウォータポンプ吸込口と連通させ、前記加圧キャップに
は、リザーバタンク内圧力が所定圧力以上になると開弁
してリザーバタンク内圧力をラジエータ側に逃がす弁を
設けてなる内燃機関用過給機の冷却装置において、前記
加圧キャップの弁の開弁圧力を0.7kg/cm2 以下
としたことを特徴とする内燃機関用過給機の冷却装置。
1. A center housing for covering a bearing portion of a supercharger is disposed at a position higher than a cooling water surface of a radiator, and a part of cooling water circulating through an engine cooling water circulation system in which the radiator is interposed is part of the cooling water. A reservoir tank communicating with the cooling water passage in the center housing is provided at a position higher than the center housing so as to guide the cooling water passage in the center housing to cool the bearing portion. It communicates with the radiator via a pressure cap and also communicates the reservoir tank with a water pump suction port of the engine cooling water circulation system.The pressure cap opens when the pressure in the reservoir tank becomes a predetermined pressure or more. In a cooling device for an internal combustion engine supercharger, which is provided with a valve for releasing the pressure in the reservoir tank to the radiator side, Cooling device for an internal combustion engine supercharger, characterized in that the valve pressure and 0.7 kg / cm 2 or less.
JP1738493U 1993-04-07 1993-04-07 Cooling device for internal combustion engine supercharger Pending JPH0676622U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1738493U JPH0676622U (en) 1993-04-07 1993-04-07 Cooling device for internal combustion engine supercharger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1738493U JPH0676622U (en) 1993-04-07 1993-04-07 Cooling device for internal combustion engine supercharger

Publications (1)

Publication Number Publication Date
JPH0676622U true JPH0676622U (en) 1994-10-28

Family

ID=11942516

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1738493U Pending JPH0676622U (en) 1993-04-07 1993-04-07 Cooling device for internal combustion engine supercharger

Country Status (1)

Country Link
JP (1) JPH0676622U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007192099A (en) * 2006-01-19 2007-08-02 Mitsubishi Motors Corp Engine cooling system structure for vehicle
JP2009270485A (en) * 2008-05-07 2009-11-19 Yanmar Co Ltd Cooling water circuit of stationary engine
KR101875961B1 (en) * 2012-07-27 2018-07-06 현대자동차주식회사 Cooling system of vehicle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007192099A (en) * 2006-01-19 2007-08-02 Mitsubishi Motors Corp Engine cooling system structure for vehicle
JP2009270485A (en) * 2008-05-07 2009-11-19 Yanmar Co Ltd Cooling water circuit of stationary engine
KR101875961B1 (en) * 2012-07-27 2018-07-06 현대자동차주식회사 Cooling system of vehicle

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