JPH08240118A - Temperature sensing valve device in engine cooling water circulation system - Google Patents
Temperature sensing valve device in engine cooling water circulation systemInfo
- Publication number
- JPH08240118A JPH08240118A JP6674595A JP6674595A JPH08240118A JP H08240118 A JPH08240118 A JP H08240118A JP 6674595 A JP6674595 A JP 6674595A JP 6674595 A JP6674595 A JP 6674595A JP H08240118 A JPH08240118 A JP H08240118A
- Authority
- JP
- Japan
- Prior art keywords
- passage
- bypass
- cooling water
- temperature
- 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
Links
Landscapes
- Temperature-Responsive Valves (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、エンジン冷却水循環
システムにおける感温バルブ装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature sensitive valve device in an engine cooling water circulation system.
【０００２】[0002]
【従来の技術】エンジン冷却水循環システムは一般に図
２に示すように、ウォータポンプＰからエンジンのシリ
ンダブロックＢ，シリンダヘッドＨを経てヒータＥを通
り再びウォータポンプＰに戻る循環路１に、ヒータＥの
上流及び下流側に接続されたバイパス通路２を設け、こ
のバイパス通路２をさらにラジエターＲを通るラジエタ
ー通路３に接続した構成となっている。ここで、バイパ
ス通路２と循環路１及びラジエター通路３との接続部に
は水温を一定にコントロールするため、図３に示す感温
バルブ装置Ｖが設けられている。この感温バルブ装置Ｖ
は、ラジエター通路３と循環路１との連通・遮断を行う
ためのメインバルブＶ１と、バイパス通路２と循環路１
との連通・遮断を行うためのバイパスバルブＶ２と、水
温を検知してメインバルブＶ１及びバイパスバルブＶ２
の位置を変化させる水温感知部Ｖ３とからなっている。
このような温度制御方式は一般に入口制御方式と称され
ている。2. Description of the Related Art As shown in FIG. 2, an engine cooling water circulation system generally includes a heater E in a circulation path 1 from a water pump P, a cylinder block B of an engine, a cylinder head H, a heater E, and a water pump P. The bypass passage 2 connected to the upstream side and the downstream side is provided, and the bypass passage 2 is further connected to the radiator passage 3 passing through the radiator R. Here, a temperature sensitive valve device V shown in FIG. 3 is provided at a connection portion between the bypass passage 2 and the circulation passage 1 and the radiator passage 3 in order to control the water temperature at a constant level. This temperature sensitive valve device V
Is a main valve V1 for connecting and disconnecting the radiator passage 3 and the circulation passage 1, a bypass passage 2 and a circulation passage 1
By-pass valve V2 for connecting and disconnecting with, and main valve V1 and bypass valve V2 that detect water temperature
And a water temperature sensing unit V3 for changing the position of.
Such a temperature control method is generally called an inlet control method.
【０００３】感温バルブ装置Ｖは、水温感知部Ｖ３が所
定値以下の温度を検知した場合には、メインバルブＶ１
を閉位置に位置させてラジエターＲからの冷水の循環路
１への流入をストップさせるとともにバイパスバルブＶ
２を開位置に位置させてバイパス通路２と循環路１とを
連通させる。また水温感知部Ｖ３が所定値を越える温度
を検知した場合には、メインバルブＶ１を開位置に位置
させてラジエターＲからの冷水を循環路１に流入させる
とともにバイパスバルブＶ２を閉じてバイパス通路２と
循環路１とを閉ざし、ラジエターＲからより多量の冷却
水が循環路１に流れるようになっている。The temperature sensitive valve device V has a main valve V1 when the water temperature sensing portion V3 detects a temperature below a predetermined value.
To the closed position to stop the flow of cold water from the radiator R into the circulation path 1 and to bypass the bypass valve V
The bypass passage 2 and the circulation passage 1 are communicated with each other by arranging 2 in the open position. When the water temperature sensing unit V3 detects a temperature exceeding a predetermined value, the main valve V1 is placed in the open position to allow cold water from the radiator R to flow into the circulation path 1 and the bypass valve V2 to be closed to bypass the bypass passage 2 And the circulation path 1 are closed so that a larger amount of cooling water flows from the radiator R to the circulation path 1.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら上記従来
のエンジン水温制御装置では、エンジンが暖機運転状態
すなわち上記水温感知部Ｖ３が所定値を越える温度を検
出する前の状態ではバイパスバルブＶ２が開位置に位置
しており、このためバイパス通路２を絞ることができ
ず、ヒータＥ側からの流量が不足してヒータ性能を効率
的に引き出すことができない問題点を有していた。However, in the above-described conventional engine water temperature control device, the bypass valve V2 is in the open position when the engine is warming up, that is, before the water temperature sensing unit V3 detects a temperature exceeding a predetermined value. Therefore, the bypass passage 2 cannot be throttled, and the flow rate from the heater E side is insufficient, so that the heater performance cannot be efficiently obtained.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するた
め、請求項１のエンジン冷却水循環システムにおける感
温バルブ装置は、ウォータポンプによりエンジンを経て
加熱手段を通る循環路に、前記加熱手段の上流及び下流
間でバイパス通路を設け、かつこのバイパス通路を前記
循環路を介してラジエターを通るラジエター通路に接続
してなるエンジン冷却水循環システムにおいて前記バイ
パス通路と前記循環路及びラジエター通路の接続部に設
けられる感温バルブ装置であって、当該感温バルブ装置
は、エンジンが暖機状態では、ラジエター通路と前記循
環路との連通を遮断し、かつ前記バイパス通路と前記循
環路の間の連通を遮断しもしくは連通面積を絞る構成と
したことを特徴とする。また請求項２は、請求項１の感
温バルブ装置において弁本体は、ラジエター側の接続口
をウォータポンプ側の接続口及び加熱手段側の接続口に
対し連通・遮断するためのメインバルブと、前記バイパ
ス通路側の接続口を前記ウォータポンプ側の接続口及び
加熱手段側の接続口に対し連通・遮断するためのバイパ
スバルブと、水温を検知して前記メインバルブ及び前記
バイパスバルブの位置を変化させる水温感知部とから構
成したことを特徴とする。In order to solve the above-mentioned problems, a temperature-sensitive valve device in an engine cooling water circulation system according to a first aspect of the present invention comprises a water pump, an engine, a circulation path passing through the heating means, and a upstream side of the heating means. And a bypass passage is provided between the downstream side and the bypass passage, and the bypass passage is connected to the radiator passage that passes through the radiator through the circulation passage. In the engine cooling water circulation system, the bypass passage and the connection portion between the circulation passage and the radiator passage are provided. The temperature-sensitive valve device according to claim 1, wherein the temperature-sensitive valve device cuts off communication between the radiator passage and the circulation passage and cuts off communication between the bypass passage and the circulation passage when the engine is warmed up. The feature is that the communication area is narrowed down. According to a second aspect, in the temperature-sensitive valve device according to the first aspect, the valve body has a main valve for connecting and disconnecting the radiator-side connection port with the water-pump-side connection port and the heating means-side connection port. A bypass valve for connecting and disconnecting the bypass passage side connection port to the water pump side connection port and the heating means side connection port, and changing the positions of the main valve and the bypass valve by detecting the water temperature. It is characterized in that it is composed of a water temperature sensing unit.
【０００６】[0006]
【作用】請求項１の発明では当該感温バルブ装置はエン
ジンが暖機状態では、ラジエター通路と循環路との連通
を遮断し、かつ前記バイパス通路と前記循環路の間の連
通を遮断しもしくは連通面積を絞る構成となっているの
で、冷却水は殆どが加熱手段を通って循環する。請求項
２の発明ではメインバルブによりラジエター側の接続口
をウォータポンプ側の接続口及び加熱手段側の接続口に
対し連通・遮断させ、バイパスバルブによりバイパス通
路側の接続口をウォータポンプ側の接続口及び加熱手段
側の接続口に対し連通・遮断する構成とし、しかもこれ
らを水温感知部により同時に作動させることにより請求
項１の制御を行うことができるようになっている。According to the first aspect of the present invention, in the temperature sensitive valve device, when the engine is warmed up, the communication between the radiator passage and the circulation passage is cut off, and the communication between the bypass passage and the circulation passage is cut off. Since the communication area is narrowed down, most of the cooling water circulates through the heating means. According to the second aspect of the invention, the main valve connects and disconnects the radiator-side connection port with the water-pump-side connection port and the heating means-side connection port, and the bypass valve connects the bypass-passage-side connection port with the water-pump side connection port. The control according to claim 1 can be performed by connecting and disconnecting the mouth and the connection port on the side of the heating means, and activating them simultaneously by the water temperature sensing unit.
【０００７】[0007]
【実施例】次に発明の一実施例によるエンジン冷却水循
環システムにおける感温バルブ装置の構成を図１を参照
して説明する。なお本実施例の感温バルブ装置１０は図
２に示したと同様なエンジン冷却水循環システムにおい
て従来の感温バルブ装置Ｖと同様な箇所に設置されるも
のであり、図２と同様な部材には同一符号を付して説明
を省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the structure of a temperature sensitive valve device in an engine cooling water circulation system according to an embodiment of the present invention will be described with reference to FIG. The temperature sensitive valve device 10 of the present embodiment is installed in the same location as the conventional temperature sensitive valve device V in the engine cooling water circulation system similar to that shown in FIG. The same reference numerals are given and the description is omitted.
【０００８】感温バルブ装置１０のハウジング１１に
は、ラジエター通路３のラジエターＲ下流側との接続口
１２と、循環路１のウォータポンプＰ上流側との接続口
１３と、循環路１のヒータＥ下流側との接続口１４と、
バイパス通路２の下流側との接続口１５とが設けられて
おり、接続口１２と接続口１５は上下方向に、接続口１
３と接続口１４とは左右方向にそれぞれ対向状で配置さ
れている。In the housing 11 of the temperature sensitive valve device 10, a connection port 12 with the radiator R downstream side of the radiator passage 3, a connection port 13 with the water pump P upstream side of the circulation passage 1, and a heater of the circulation passage 1 are provided. E Connection port 14 with the downstream side,
A connection port 15 to the downstream side of the bypass passage 2 is provided, and the connection port 12 and the connection port 15 are arranged in the vertical direction.
3 and the connection port 14 are arranged facing each other in the left-right direction.
【０００９】ハウジング１１の内部には弁本体１６が配
置されており、この弁本体１６は、ラジエターＲ側の接
続口１２をウォータポンプＰ側の接続口１３及びヒータ
Ｅ側の接続口１４に対し連通・遮断するための流量制御
板１７を備えたメインバルブ１８と、バイパス通路２側
の接続口１５をウォータポンプＰ側の接続口１３及びヒ
ータＥ側の接続口１４に対し連通・遮断するためのバイ
パスバルブ１９と、水温を検知してメインバルブ１８及
びバイパスバルブ１９の位置を変化させる水温感知部２
０とからなっている。A valve body 16 is arranged inside the housing 11. The valve body 16 has a connection port 12 on the radiator R side with respect to a connection port 13 on the water pump P side and a connection port 14 on the heater E side. In order to connect / disconnect the main valve 18 having the flow rate control plate 17 for communication / disconnection, and the connection port 15 on the bypass passage 2 side to the connection port 13 on the water pump P side and the connection port 14 on the heater E side. Bypass valve 19 and a water temperature sensing unit 2 for detecting the water temperature and changing the positions of the main valve 18 and the bypass valve 19
It consists of 0.
【００１０】またハウジングの内部には上記弁本体１６
のメインバルブ１８の着座のための上部バルブシート２
１が上記左右の接続口１３，１４の上方位置において配
置されており、また接続口１３，１４の下方にはバイパ
スバルブ１９が下側から当接する下部バルブシート２２
が設けられいる。この下部バルブシート２２には上記バ
イパスバルブ１９により開閉される大径の第１連通孔２
３と、これに隣接して配置された小径の第２連通孔２４
とが形成されている。Further, the valve body 16 is provided inside the housing.
Upper valve seat 2 for seating the main valve 18 of the
1 is disposed above the left and right connection ports 13 and 14, and below the connection ports 13 and 14, a bypass valve 19 is in contact with the lower valve seat 22 from below.
Is provided. The lower valve seat 22 has a large-diameter first communication hole 2 that is opened and closed by the bypass valve 19.
3 and a second communication hole 24 of small diameter arranged adjacent to this
And are formed.
【００１１】さて、このような弁本体１６は、エンジン
が暖機状態では、すなわち冷却水が所定の温度以下で
は、図１に示したようにメインバルブ１８及びバイパス
バルブ１９はそれぞれ上部バルブシート２１及び下部バ
ルブシート２２に当接した閉位置にあり、ほぼヒータＥ
側のみがウォータポンプＰ側と接続され、循環路１のみ
を冷却水が循環することとなり、ウォータポンプＰの吐
出水の殆どがヒータＥに流れることとなるので、ビータ
Ｅ性能を効率的に引き出すことができる。なお、この状
態でバイパス通路２は第２連通孔２４により接続口１
３，１４側すなわち循環路１側に接続されているが、こ
の第２連通孔２４を流れる冷却水の流量はエンジン内圧
限界を考慮して設定されるものであり、場合によっては
設けなくとも良い。Now, in such a valve body 16, when the engine is warmed up, that is, when the temperature of the cooling water is below a predetermined temperature, the main valve 18 and the bypass valve 19 are respectively the upper valve seat 21 as shown in FIG. And in the closed position where it abuts the lower valve seat 22, and the heater E
Only the side is connected to the water pump P side, and the cooling water circulates only in the circulation path 1, and most of the discharge water of the water pump P flows to the heater E, so that the beater E performance is efficiently drawn out. be able to. In this state, the bypass passage 2 is connected to the connection port 1 by the second communication hole 24.
3, 14 or the circulation path 1 side, the flow rate of the cooling water flowing through the second communication hole 24 is set in consideration of the engine internal pressure limit, and may not be provided in some cases. .
【００１２】一方、エンジンの暖機後、すなわち冷却水
の温度が所定の温度を越えると、水温感知部２０が伸長
してメインバルブ１８及びバイパスバルブ１９はそれぞ
れ上部バルブシート２１及び下部バルブシート２２から
離隔して開状態となる。これによりラジエター通路３及
びバイパス通路２が循環路１と接続状態となり、従来と
同様にラジエターＲによる冷却水の冷却作用を伴ってエ
ンジン水温を適温に制御できる。On the other hand, after the engine is warmed up, that is, when the temperature of the cooling water exceeds a predetermined temperature, the water temperature sensing unit 20 expands, and the main valve 18 and the bypass valve 19 have the upper valve seat 21 and the lower valve seat 22 respectively. Separated from and open. As a result, the radiator passage 3 and the bypass passage 2 are connected to the circulation passage 1, and the engine water temperature can be controlled to an appropriate temperature with the cooling action of the cooling water by the radiator R as in the conventional case.
【００１３】また、冷却水温度が上記所定温度よりも高
い第２の所定温度になるとメインバルブ１８が全開状態
となり、一方、バイパスバルブ１９は閉状態となるた
め、ラジエター通路３が専ら循環路１と接続され、ラジ
エターＲによる冷却水の冷却作用がさらに効率的に行わ
れてエンジン水温を適温に制御できる。When the cooling water temperature reaches a second predetermined temperature higher than the above predetermined temperature, the main valve 18 is fully opened, while the bypass valve 19 is closed, so that the radiator passage 3 is exclusively the circulation passage 1. The cooling action of the cooling water by the radiator R is performed more efficiently, and the engine water temperature can be controlled to an appropriate temperature.
【００１４】本実施例では冷却水温度の変化に伴うこれ
らの制御を水温感知部２０によりメインバルブ１８及び
バイパスバルブ１９を同時に作動させる簡単な構造とな
っている。なお、以上の実施例ではバイパス通路２と循
環路１との連通・遮断を行うためのバイパスバルブ１９
は下部バルブシート２２に下側から当接して第１連通孔
２３の開閉を行うものとしたが、このようなバイパスバ
ルブ１９／下部バルブシート２２組はバイパスバルブ１
９の上下位置に従って開口面積を可変なものであればい
かなるものであっても良く、またその開閉制御は水温感
知部２０に限らず、温度変化に応じて作動される電磁弁
やバネ付勢された弁等種々のものを利用できる。さら
に、以上の実施例では冷却水を利用した加熱手段をヒー
タＥとしたが、例えばインテークマニホルド加熱用配管
等種々の加熱手段に適用できる。The present embodiment has a simple structure in which the water temperature sensing unit 20 simultaneously operates the main valve 18 and the bypass valve 19 for these controls associated with changes in the cooling water temperature. In the above embodiment, the bypass valve 19 for connecting and disconnecting the bypass passage 2 and the circulation passage 1 is provided.
The lower valve seat 22 contacts the lower valve seat 22 from below to open and close the first communication hole 23. Such a bypass valve 19 / lower valve seat 22 set is used for the bypass valve 1
Any opening may be used as long as the opening area can be changed according to the vertical position of 9, and the opening / closing control is not limited to the water temperature sensing unit 20, but may be a solenoid valve operated according to a temperature change or a spring bias. It is possible to use various things such as a valve. Further, in the above embodiments, the heating means using the cooling water is the heater E, but it can be applied to various heating means such as an intake manifold heating pipe.
【００１５】[0015]
【発明の効果】請求項１の発明では、エンジンが暖機状
態では冷却水は殆どが加熱手段を通って循環するので、
加熱手段による冷却水の加熱を効率的に行うことができ
る。請求項２の発明では、メインバルブとバイパスバル
ブを水温感知部により同時に作動させることにより、簡
単な構造で請求項１の制御を行うことができる利点を有
する。According to the present invention, most of the cooling water circulates through the heating means when the engine is warmed up.
The cooling water can be efficiently heated by the heating means. The invention of claim 2 has an advantage that the control of claim 1 can be performed with a simple structure by simultaneously operating the main valve and the bypass valve by the water temperature sensing unit.
【図１】本発明の一実施例によるエンジン冷却水循環シ
ステムにおける感温バルブ装置の断面図。FIG. 1 is a cross-sectional view of a temperature sensitive valve device in an engine cooling water circulation system according to an embodiment of the present invention.
【図２】エンジン冷却水循環システムを示す図。FIG. 2 is a diagram showing an engine cooling water circulation system.
【図３】従来の感温バルブ装置の断面図。FIG. 3 is a cross-sectional view of a conventional temperature sensitive valve device.
１ 循環路 ２ バイパス通路 ３ ラジエター通路 Ｐ ウォータポンプ Ｅ ヒータ Ｒ ラジエター １０ 感温バルブ装置 １２〜１５ 接続口 １８ メインバルブ １９ バイパスバルブ ２０ 水温感知部 1 Circulation path 2 Bypass path 3 Radiator path P Water pump E Heater R Radiator 10 Temperature sensing valve device 12 to 15 Connection port 18 Main valve 19 Bypass valve 20 Water temperature sensing unit
Claims (2)
熱手段を通る循環路に、前記加熱手段の上流及び下流間
でバイパス通路を設け、かつこのバイパス通路を前記循
環路を介してラジエターを通るラジエター通路に接続し
てなるエンジン冷却水循環システムにおいて前記バイパ
ス通路と前記循環路及びラジエター通路の接続部に設け
られる感温バルブ装置であって、当該感温バルブ装置
は、エンジンが暖機状態では、ラジエター通路と前記循
環路との連通を遮断し、かつ前記バイパス通路と前記循
環路の間の連通を遮断しもしくは連通面積を絞る構成と
したエンジン冷却水循環システムにおける感温バルブ装
置。1. A bypass passage is provided between an upstream side and a downstream side of the heating means in a circulation passage that passes through an engine by a water pump, and the bypass passage is a radiator passage that passes a radiator through the circulation passage. A temperature-sensitive valve device provided in a connection portion of the bypass passage, the circulation passage, and a radiator passage in an engine cooling water circulation system that is connected, the temperature-sensitive valve device including a radiator passage when the engine is warmed up. A temperature sensitive valve device in an engine cooling water circulation system configured to cut off communication with the circulation path and cut off communication between the bypass path and the circulation path or reduce a communication area.
ター側の接続口をウォータポンプ側の接続口及び加熱手
段側の接続口に対し連通・遮断するためのメインバルブ
と、前記バイパス通路側の接続口を前記ウォータポンプ
側の接続口及び加熱手段側の接続口に対し連通・遮断す
るためのバイパスバルブと、水温を検知して前記メイン
バルブ及び前記バイパスバルブの位置を変化させる水温
感知部とからなっている請求項１のエンジン冷却水循環
システムにおける感温バルブ装置。2. The valve body of the temperature sensitive valve device comprises a main valve for connecting / disconnecting a radiator side connection port to a water pump side connection port and a heating means side connection port, and the bypass passage side. Bypass valve for connecting and disconnecting the connection port of the water pump with the connection port of the water pump side and the connection port of the heating means, and a water temperature sensing unit for detecting the water temperature and changing the positions of the main valve and the bypass valve. The temperature-sensitive valve device in the engine cooling water circulation system according to claim 1, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6674595A JPH08240118A (en) | 1995-02-28 | 1995-02-28 | Temperature sensing valve device in engine cooling water circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6674595A JPH08240118A (en) | 1995-02-28 | 1995-02-28 | Temperature sensing valve device in engine cooling water circulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08240118A true JPH08240118A (en) | 1996-09-17 |
Family
ID=13324730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6674595A Pending JPH08240118A (en) | 1995-02-28 | 1995-02-28 | Temperature sensing valve device in engine cooling water circulation system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08240118A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1083309A2 (en) * | 1999-09-08 | 2001-03-14 | ZF FRIEDRICHSHAFEN Aktiengesellschaft | Cooling circuit |
| KR101013961B1 (en) * | 2007-12-14 | 2011-02-14 | 기아자동차주식회사 | Circulation Circuit of Cooling Water For Engine |
-
1995
- 1995-02-28 JP JP6674595A patent/JPH08240118A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1083309A2 (en) * | 1999-09-08 | 2001-03-14 | ZF FRIEDRICHSHAFEN Aktiengesellschaft | Cooling circuit |
| EP1083309A3 (en) * | 1999-09-08 | 2003-01-02 | ZF FRIEDRICHSHAFEN Aktiengesellschaft | Cooling circuit |
| KR101013961B1 (en) * | 2007-12-14 | 2011-02-14 | 기아자동차주식회사 | Circulation Circuit of Cooling Water For Engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0580934B1 (en) | Cooling system for an automotive engine | |
| JP2007107522A (en) | Cooling system for combustion engine | |
| JP3185581B2 (en) | Internal combustion engine cooling system | |
| KR950006422A (en) | Temperature control system for internal combustion engines | |
| JPS61201816A (en) | Cooling device for engine | |
| JP4091584B2 (en) | Engine exhaust gas recirculation system | |
| US5884587A (en) | Car engine coolant pipeline | |
| JPH08240118A (en) | Temperature sensing valve device in engine cooling water circulation system | |
| US6733352B1 (en) | Electronically controlled cooling system for a marine propulsion engine | |
| JP2869700B2 (en) | Water heater | |
| JP4151881B2 (en) | Engine cooling system | |
| JPH11182241A (en) | Cooling device for internal combustion engine | |
| JPH07180555A (en) | Cooling device for engine | |
| JPH0730902Y2 (en) | Engine cooling system | |
| US3937197A (en) | Heating means for the intake system of a water-cooled combustion engine | |
| JPH08158871A (en) | Cooling device of internal combustion engine | |
| JP2006037874A (en) | Engine cooling device | |
| JPH0571341A (en) | Cooling device of engine | |
| JPS6344932B2 (en) | ||
| JPS59200011A (en) | Engine cooling device | |
| JP7488134B2 (en) | Cooling System | |
| JPH11107754A (en) | Cooling system of internal combustion engine | |
| JPS60128968A (en) | Suction heating mechanism for internal-combustion engine | |
| JP2737611B2 (en) | Engine cooling system | |
| JPH08177491A (en) | Cooling device for internal combustion engine |