JPS62101816A - Cooling device for engine - Google Patents

Cooling device for engine

Info

Publication number
JPS62101816A
JPS62101816A JP24155285A JP24155285A JPS62101816A JP S62101816 A JPS62101816 A JP S62101816A JP 24155285 A JP24155285 A JP 24155285A JP 24155285 A JP24155285 A JP 24155285A JP S62101816 A JPS62101816 A JP S62101816A
Authority
JP
Japan
Prior art keywords
cooling water
passage
engine
valve
water passage
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
JP24155285A
Other languages
Japanese (ja)
Inventor
Kenji Kashiyama
謙二 樫山
Kazumasa Nomura
野村　一正
Kiyomi Takakura
高椋　清美
Masanori Miyachika
宮近　正憲
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.)
Mazda Motor Corp
Original Assignee
Mazda Motor 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 Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP24155285A priority Critical patent/JPS62101816A/en
Publication of JPS62101816A publication Critical patent/JPS62101816A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F01P2003/027—Cooling cylinders and cylinder heads in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/50—Temperature using two or more temperature sensors

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

PURPOSE:To prevent the local rise in temperature of a cylinder block and prevent overheating, etc. by providing a means of allowing a cooling water to flow through a cooling water passage which passes through said cylinder block, in response to the high output zone operation of an engine. CONSTITUTION:A first cooling water passage 3 which passes through a cylinder block 2 and a second cooling water passage 5 which passes through a cylinder head 4 are provided in an engine body 1. Cooling water from a water pump 6 passes through each of the cooling water passages 3, 5, and are confluent in a confluent passage 7, to reach a radiator 8. In this construction, a passage 12 which bypasses a second thermostat valve 11, is provided on the first cooling water passage 3, and a valve 13 is provided in this passage 12. This valve 13 is driven by a control unit 15 based on a signal from a sensor 14 which detects an intake-pipe negative pressure, etc. Thereby, when the operation of an engine is shifted to a high output zone operation, the valve 13 is opened to cool the cylinder block 2.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は水冷式エンジンの冷却装置に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a cooling device for a water-cooled engine.

（従来技術） 従来、自動車の水冷式エンジンの冷却装置においては、
ウォータポンプからエンジン本体に送られた冷却水をエ
ンジン本体から導出するための通路に、所定の設定温度
で動作するサーモスタットバルブを設けて、冷却水温度
に応じて、冷却水をラジェータに流したり、あるいはラ
ジェータを通さずにボトムバイパス通路を通じてウォー
タポンプに還流させたりする選択を行なう構成とされて
いる。(Prior Art) Conventionally, in a cooling system for a water-cooled automobile engine,
A thermostatic valve that operates at a predetermined set temperature is installed in the passage for leading the cooling water sent from the water pump to the engine body, and the cooling water is flowed to the radiator according to the cooling water temperature. Alternatively, the configuration is such that the water is returned to the water pump through the bottom bypass passage without passing through the radiator.

ところで、エンジンのシリンダヘッドは、そこに燃焼室
が存在することから、シリンダブロックよりも熱的に苛
酷な条件下にさらされるため、例えば特開昭５７−９７
０１４号公報に開示されているように、シリンダブロッ
クとシリンダヘッドとに別々の冷却水通路を設けて、シ
リンダヘッドに対してより多くの冷却水を供給するよう
になされた２系統冷却式エンジンが提案されている。By the way, the cylinder head of an engine is exposed to harsher thermal conditions than the cylinder block due to the presence of a combustion chamber therein.
As disclosed in Publication No. 014, a dual cooling type engine is provided with separate cooling water passages for the cylinder block and cylinder head to supply more cooling water to the cylinder head. Proposed.

第３図はそのような従来の２系統冷却式エンジンの冷却
系統図を示し、エンジン本体ｌにはシリンダブロック２
を通る第１の冷却水通路３と、シリンダヘッド４を通る
第２の冷却水通路５とが別々に設けられており、冷却水
はウォータポンプ６から第１および第２の冷却水通路３
．５を別々に通ってから合流通路７で合流され、この合
流通路７を通ってラジェータ８に至るように構成されて
いる。合流通路７とラジェータ８との間には、温度ＴＩ
で動作するように設定された第１のサーモスタットバル
ブ９が設けられ、冷却水温度が設定温度Ｔ１より低い場
合には、冷却水はボトムバイパス通路１０を通って直接
ウォータポンプ６に還流され、冷却水温度が温度Ｔ１に
達したときに第１のサーモスタットバルブ９が作動して
、冷却水はラジェータ８を通ってウォータポンプ６に還
流される。さらにシリンダブロック２を通る第１の冷却
水通路３には、温度Ｔ２で動作するように設定された第
２のサーモスタットバルブ１１が設けられている。そし
て熱疲労強度的に厳しい状態にあるシリンダヘッドを十
分に冷却するために、第２のサーモスタットバルブ１１
の設定温度Ｔ２は、第１のサーモスタットバルブ９の設
定温度Ｔ１よりも高く設定され、シリンダブロック２内
の冷却水が設定温度Ｔ２よりも低い場合には、冷却水は
シリンダヘッド４にのみ流れるように構成されている。Figure 3 shows a cooling system diagram of such a conventional two-system cooling engine.
A first cooling water passage 3 passing through the cylinder head 4 and a second cooling water passage 5 passing through the cylinder head 4 are provided separately, and the cooling water is passed from the water pump 6 to the first and second cooling water passages 3.
．． 5 separately and then merged at a merging passage 7, and then reaching the radiator 8 through this merging passage 7. There is a temperature TI between the confluence passage 7 and the radiator 8.
A first thermostatic valve 9 is provided which is set to operate at a temperature T1, and when the cooling water temperature is lower than the set temperature T1, the cooling water is directly returned to the water pump 6 through the bottom bypass passage 10, and the cooling water is returned to the water pump 6 through the bottom bypass passage 10. When the water temperature reaches temperature T1, the first thermostatic valve 9 is activated and the cooling water is returned to the water pump 6 through the radiator 8. Further, the first cooling water passage 3 passing through the cylinder block 2 is provided with a second thermostatic valve 11 set to operate at a temperature T2. In order to sufficiently cool the cylinder head, which is in a severe condition in terms of thermal fatigue strength, a second thermostatic valve 11 is installed.
The set temperature T2 is set higher than the set temperature T1 of the first thermostatic valve 9, and when the cooling water in the cylinder block 2 is lower than the set temperature T2, the cooling water flows only to the cylinder head 4. It is composed of

しかしながら、上述の構成においては、通常の運転領域
では何隻支障はないとしても、軽負荷時あるいはアイド
ル運転時のような低出力領域運転が行なわれている状態
から急激に加速されて高出力領域運転に移行した場合、
シリンダブロック２全体の冷却水温度の上昇により第２
のサーモスタットバルブ１１が温度Ｔ２で開く以前に、
シリンダブロック２のシリンダヘッド４に近接した部分
が急激に高温となり、このためこの部分の冷却水の水温
が局部的に上昇して特にウォータジャケット上部におい
て、冷却水が蒸発する現象を生じることがある。この蒸
発現象が発生すると、シリンダブロック２のトップデツ
キ付近の壁温が急激に上昇し、オーバーヒートやピスト
ンリングスティックあるいはピストン焼付き等の障害が
発生するおそれがあった。However, in the above-mentioned configuration, even if there is no problem in the normal operating range, if the vehicle is suddenly accelerated from a state in which it is operating in a low power range such as light load or idling, and is in a high power range If you start driving,
Due to an increase in the cooling water temperature of the entire cylinder block 2, the second
Before the thermostatic valve 11 of opens at temperature T2,
The part of the cylinder block 2 that is close to the cylinder head 4 suddenly becomes high temperature, which may cause the temperature of the cooling water in this part to rise locally, causing the cooling water to evaporate, especially in the upper part of the water jacket. . When this evaporation phenomenon occurs, the wall temperature in the vicinity of the top deck of the cylinder block 2 rapidly increases, which may cause problems such as overheating, piston ring sticking, or piston seizure.

（発明の目的） 本発明は、上述した従来の２系統冷却式エンジンの冷却
装置における問題点を打開すべくなされたもので、エン
ジンの高出力領域運転時に、冷却水をエンジンブロック
側に強制的に流すようにして、エンジンブロックにおけ
る局部的な冷却水の温度上昇を防止することを目的とす
る。(Object of the Invention) The present invention has been made to overcome the problems in the conventional two-system cooling engine cooling system described above. The purpose of this is to prevent local temperature rises in the cooling water in the engine block.

（発明の構成） 本発明は、エンジンの高出力領域運転時に、それに応動
して、シリンダブロックを通る第１の冷却水通路に冷却
水が流れるのを許容する手段を、この第１の冷却水通路
に関連して設けたことを特徴とする。(Structure of the Invention) The present invention provides means for allowing cooling water to flow into a first cooling water passage passing through a cylinder block in response to the operation of the engine in a high power region. It is characterized by being provided in connection with a passage.

（発明の効果） 本発明によれば、高出力領域運転時においてシリンダブ
ロックの温度が局部的に上昇することがなくなり、オー
バーヒート等の障害の発生を防止することができる効果
がある。(Effects of the Invention) According to the present invention, the temperature of the cylinder block does not locally increase during operation in a high power range, and it is possible to prevent troubles such as overheating from occurring.

−（実　施　例） 以下本発明の実施例について第１図および第２図を参照
して詳細に説明する。- (Example) Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 and 2.

第１図は本発明の第１の実施例を第３図と対応させて示
す冷却系統図で、第３図との対応部分には同一の符号を
付して共通部分に対する詳細な説明は省略するが、本実
施例は、シリンダブロック２を通る第１の冷却水通路３
に、第２のサーモスタットバルブ１１をバイパスするバ
イパス通路１２を設け、かつこのバイパス通路１２の途
中にバルブ１３を設けたものである。このバルブ１３は
、吸気管負圧あるいはスロットル開度を検出するセンサ
１４からの信号にもとづいて動作する制御装置１５によ
って駆動され、エンジンが高出力領域運転に移行したと
きにセンサ１４がこれを検知してバルブ１３が開き、第
２のサーモスタットバルブ１１が閉状態にある場合でも
冷却水が第１図に破線で示すようにバルブ１３を通じて
バイパス通路１２に流れ、シリンダブロック２を冷却す
るように構成されている。FIG. 1 is a cooling system diagram showing the first embodiment of the present invention in correspondence with FIG. 3. Corresponding parts to those in FIG. 3 are given the same reference numerals, and detailed explanations of common parts are omitted. However, in this embodiment, the first cooling water passage 3 passing through the cylinder block 2
A bypass passage 12 is provided to bypass the second thermostatic valve 11, and a valve 13 is provided in the middle of this bypass passage 12. This valve 13 is driven by a control device 15 that operates based on a signal from a sensor 14 that detects intake pipe negative pressure or throttle opening, and the sensor 14 detects when the engine shifts to high output region operation. Even when the valve 13 is opened and the second thermostat valve 11 is closed, the cooling water flows through the valve 13 to the bypass passage 12 as shown by the broken line in FIG. 1 to cool the cylinder block 2. has been done.

次に第２図は本発明の第２の実施例を示し、本実施例に
おいては、上述の第１の実施例のようなバイパス通路１
２もバルブ１３も設けられていないが、第２のサーモス
タットバルブ１１を、高出力領域運転時において、それ
の設定温度が、センサ１４および制御装置１５の動作に
よって、初期の設定温度Ｔ２から連続的あるいは段階的
に低下するように構成したものである。このような構成
によれば、高出力領域運転時には第２のサーモスタンド
バルブ１１が初期の設定温度Ｔ２よりも低い温度で動作
することになり、これによりシリンダブロック２内を冷
却水が流れてシリンダブロック２を冷却するから、第２
の実施例によっても本　　　。Next, FIG. 2 shows a second embodiment of the present invention, in which a bypass passage 1 like the first embodiment described above is used.
Although neither thermostatic valve 2 nor valve 13 is provided, the second thermostatic valve 11 is operated so that its set temperature is continuously changed from the initial set temperature T2 by the operation of the sensor 14 and the control device 15 during high output region operation. Alternatively, it is configured to decrease in stages. According to such a configuration, during operation in the high output region, the second thermostand valve 11 operates at a temperature lower than the initial set temperature T2, and as a result, cooling water flows inside the cylinder block 2 to cool the cylinder. Since block 2 is cooled, the second
Also by the examples of the book.

発明の目的を達成することができることは明らかである
。It is clear that the object of the invention can be achieved.

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

第１図および第２図はそれぞれ本発明によるエンジンの
冷却装置の第１および第２の実施例を示す冷却系統図、
第３図は従来のエンジンの冷却装置の冷却系統図である
。 １−・・エンジン本体　　　２・−シリンダブロック３
−・第１の冷却水通路　４−シリンダヘッド５−・〜第
２の冷却水通路　６・・−ウォータポンプ７−合流通路
　　　　　８−ラジェータ９・・−第１のサーモスタッ
トバルブ １０−・ボトムバイパス通路FIG. 1 and FIG. 2 are cooling system diagrams showing first and second embodiments of an engine cooling device according to the present invention, respectively;
FIG. 3 is a cooling system diagram of a conventional engine cooling device. 1--Engine body 2--Cylinder block 3
- First cooling water passage 4 - Cylinder head 5 - Second cooling water passage 6 - Water pump 7 - Merging passage 8 - Radiator 9 - First thermostat valve 10 - Bottom bypass passage

Claims (1)

【特許請求の範囲】 １、シリンダブロックを通る第１の冷却水通路とシリン
ダヘッドを通る第２の冷却水通路が合流する合流通路と
ラジエータとの間に、第１の設定温度で動作して前記合
流通路の冷却水が前記ラジエータに流れるのを許容する
第１のサーモスタットバルブを設け、かつ、前記第１の
設定温度よりも高い第２の設定温度で動作して前記第１
の冷却水通路に冷却水が流れるのを許容する第２のサー
モスタットバルブを前記第１の冷却水通路に設けたエン
ジンの冷却装置において、 エンジンの高出力領域運転時に、それに応動して前記第
１の冷却水通路に冷却水が流れるのを許容する手段を、
前記第１の冷却水通路に関連して設けたことを特徴とす
るエンジンの冷却装置。 ２、特許請求の範囲第１項記載の装置において、前記手
段は、前記第２のサーモスタットバルブをバイパスする
バイパス通路に設けられていて、前記エンジンの高出力
領域運転に応動して開かれて前記第１の冷却水通路に冷
却水が流れるのを許容するバルブよりなることを特徴と
するエンジンの冷却装置。 ３、特許請求の範囲第１項記載の装置において、前記手
段は、前記第２のサーモスタットバルブを、それの設定
温度が前記エンジンの高出力領域運転に応動して前記第
２の設定温度から低下するように構成したものよりなる
ことを特徴とするエンジンの冷却装置。[Claims] 1. Between the radiator and the confluence passage where the first cooling water passage passing through the cylinder block and the second cooling water passage passing through the cylinder head merge, the cooling water passage is operated at a first set temperature. A first thermostatic valve is provided that allows the cooling water in the merging passage to flow to the radiator, and the first thermostatic valve operates at a second set temperature higher than the first set temperature.
In the engine cooling system, a second thermostatic valve is provided in the first cooling water passage to allow cooling water to flow into the cooling water passage, and when the engine is operating in a high power range, the first thermostatic valve means for allowing cooling water to flow into the cooling water passage of the
An engine cooling device, characterized in that it is provided in relation to the first cooling water passage. 2. In the device according to claim 1, the means is provided in a bypass passage that bypasses the second thermostatic valve, and is opened in response to operation in a high output region of the engine. An engine cooling device comprising a valve that allows cooling water to flow into a first cooling water passage. 3. In the apparatus according to claim 1, the means controls the second thermostatic valve so that the set temperature thereof decreases from the second set temperature in response to the operation of the engine in a high output region. An engine cooling device characterized in that it consists of an engine cooling device configured to
JP24155285A 1985-10-30 1985-10-30 Cooling device for engine Pending JPS62101816A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24155285A JPS62101816A (en) 1985-10-30 1985-10-30 Cooling device for engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24155285A JPS62101816A (en) 1985-10-30 1985-10-30 Cooling device for engine

Publications (1)

Publication Number Publication Date
JPS62101816A true JPS62101816A (en) 1987-05-12

Family

ID=17076048

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24155285A Pending JPS62101816A (en) 1985-10-30 1985-10-30 Cooling device for engine

Country Status (1)

Country Link
JP (1) JPS62101816A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040031271A (en) * 2002-10-04 2004-04-13 현대자동차주식회사 outlet structure of water pump for engines adapted spilt cooling system
US6758171B2 (en) * 2001-10-26 2004-07-06 Hyundai Motor Company Engine cooling system with two thermostats
DE10250157B4 (en) * 2001-10-26 2013-04-04 Mitsubishi Jidosha Kogyo K.K. Cooling device for an internal combustion engine
FR3062878A1 (en) * 2017-02-13 2018-08-17 Suzuki Motor Corporation COOLING SYSTEM FOR INTERNAL COMBUSTION ENGINE
CN112983623A (en) * 2021-03-10 2021-06-18 神华神东煤炭集团有限责任公司 Cooling system of explosion-proof diesel engine and control method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6758171B2 (en) * 2001-10-26 2004-07-06 Hyundai Motor Company Engine cooling system with two thermostats
KR100482428B1 (en) * 2001-10-26 2005-04-14 현대자동차주식회사 Engine cooling system using two theromstat
DE10250157B4 (en) * 2001-10-26 2013-04-04 Mitsubishi Jidosha Kogyo K.K. Cooling device for an internal combustion engine
KR20040031271A (en) * 2002-10-04 2004-04-13 현대자동차주식회사 outlet structure of water pump for engines adapted spilt cooling system
FR3062878A1 (en) * 2017-02-13 2018-08-17 Suzuki Motor Corporation COOLING SYSTEM FOR INTERNAL COMBUSTION ENGINE
CN112983623A (en) * 2021-03-10 2021-06-18 神华神东煤炭集团有限责任公司 Cooling system of explosion-proof diesel engine and control method thereof
CN112983623B (en) * 2021-03-10 2022-07-01 神华神东煤炭集团有限责任公司 Cooling system of explosion-proof diesel engine and control method thereof

Similar Documents

Publication Publication Date Title
US4399776A (en) System for controlling cooling water temperature for a water-cooled engine
EP0580934B1 (en) Cooling system for an automotive engine
US6032618A (en) Cooling system for a motor-vehicle engine
JPH0768897B2 (en) Engine cooling system
KR950014540A (en) Cooling system for car engine
JPS62101816A (en) Cooling device for engine
JPH11182241A (en) Cooling device for internal combustion engine
JP3019759B2 (en) Engine warm-up promoting cooling system
JP3104538B2 (en) Internal combustion engine cooling system
JP2701648B2 (en) Engine cooling water control device
JPH11218024A (en) Forced circulation type water-cooling device for engine
JP2554937B2 (en) Internal combustion engine cooling system
KR100299712B1 (en) Cooling device of water cooled engine for vehicle
JPS6340249B2 (en)
JPS59213918A (en) Cooling device for internal-combustion engine
JPS58162716A (en) Cooling device for water-cooled engine
JPS641459Y2 (en)
JPS62170719A (en) Cooling device for engine
JPS6042187Y2 (en) Internal combustion engine cooling system
JPH0645662Y2 (en) Engine intake air amount control device
JPS58106125A (en) Control method of cooling fluid temperature in internal-combustion engine
JPH0533645A (en) Cooling system of engine for vehicle
JPS6040818Y2 (en) Automotive internal combustion engine cooling system
JP2555928Y2 (en) Radiator cooling fan controller
JPH10252472A (en) Forced circulation type water-cooled device for engine