JPH11223155A - Cooling device of multivalve type engine - Google Patents
Cooling device of multivalve type engineInfo
- Publication number
- JPH11223155A JPH11223155A JP2498898A JP2498898A JPH11223155A JP H11223155 A JPH11223155 A JP H11223155A JP 2498898 A JP2498898 A JP 2498898A JP 2498898 A JP2498898 A JP 2498898A JP H11223155 A JPH11223155 A JP H11223155A
- Authority
- JP
- Japan
- Prior art keywords
- wall
- cylinder head
- exhaust valves
- exhaust
- valves
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
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
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、シリンダ毎に複数
の排気弁を配置した多弁式エンジンに関し、特に上記多
弁式エンジンを冷却する冷却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 multi-valve engine in which a plurality of exhaust valves are arranged for each cylinder, and more particularly to a cooling device for cooling the multi-valve engine.
【０００２】[0002]
【従来の技術】１つのシリンダに対して複数の吸排気弁
をシリンダヘッドに配置することで、弁の面積を大きく
して吸排気効率を上昇させて、高速高出力を可能にした
多弁式エンジンが知られている。この種の多弁式エンジ
ンでは、高温の排気ガスが燃焼室から各排気弁を介して
排気ポートへ排出されるため、それらの排気弁同士間に
位置するシリンダヘッドの排気弁間肉壁が上記排気ガス
で熱せられて高温化しやすい。2. Description of the Related Art By arranging a plurality of intake / exhaust valves for one cylinder in a cylinder head, a multi-valve engine capable of increasing the intake / exhaust efficiency by increasing the valve area and increasing the speed and high output. It has been known. In this type of multi-valve engine, high-temperature exhaust gas is exhausted from the combustion chamber to the exhaust port via each exhaust valve, so that the wall between the exhaust valves of the cylinder head located between the exhaust valves has the above-mentioned exhaust gas. It is easily heated to high temperature by gas.
【０００３】[0003]
【発明が解決しようとする課題】このため、上記シリン
ダヘッドの排気弁間肉壁に大きな熱歪みが生じてしまっ
て、上記排気弁が不完全な状態に閉弁されたり、シリン
ダヘッドが熱歪みによって破損するおそれがある。本発
明は、多弁式エンジンでのシリンダヘッドの排気弁間肉
壁に熱歪みが生じることを低減することを目的とする。For this reason, a large thermal distortion occurs in the wall between the exhaust valves of the cylinder head, and the exhaust valve is closed in an incomplete state or the cylinder head is thermally deformed. May be damaged. An object of the present invention is to reduce the occurrence of thermal distortion in the wall between exhaust valves of a cylinder head in a multi-valve engine.
【０００４】[0004]
【課題を解決するための手段】[請求項１の発明]請求項
１の発明は、上記の目的を達成するために、例えば図１
から図３に示すように、次のように構成したものであ
る。一のシリンダ(３)に対して複数の排気弁(５)を有す
る多弁式エンジンにおいて、各排気弁(５)同士間に位置
するシリンダヘッド(２)の排気弁間肉壁(13)に冷却通路
(12)を設け、その冷却通路(12)に冷却用の媒体を通すよ
うに構成したものである。Means for Solving the Problems [Invention of claim 1] The invention of claim 1 is, for example, shown in FIG.
As shown in FIG. 3, the configuration is as follows. In a multi-valve engine having a plurality of exhaust valves (5) for one cylinder (3), cooling is performed on a wall (13) between exhaust valves of a cylinder head (2) located between the exhaust valves (5). aisle
(12) is provided, and a cooling medium is passed through the cooling passage (12).
【０００５】[請求項２の発明]また、請求項２の発明
は、上記請求項１の発明の構成において、さらに次のよ
うに構成したものである。一のシリンダ(３)に対して複
数の吸気弁(４)を有し、それらの各吸気弁(４)同士間に
位置するシリンダヘッド(２)の吸気弁間肉壁(14)には冷
却通路(12)を設けないように構成したものである。[Invention of claim 2] The invention of claim 2 is the same as the above-mentioned invention of claim 1, but further configured as follows. A plurality of intake valves (4) are provided for one cylinder (3), and a cooling wall is provided between the intake valves (14) of the cylinder head (2) located between the intake valves (4). The structure is such that no passage (12) is provided.
【０００６】[0006]
【作用】［請求項１］上記請求項１の発明は、例えば図
１から図３に示すように、次のように作用する。燃焼室
から各排気弁(５)を介して排気ポート(７)へ高温の排気
ガスが排出されることで、各排気弁(５)同士間に位置す
るシリンダヘッド(２)の排気弁間肉壁(13)が上記排気ガ
スによって高温化しようとするが、上記シリンダヘッド
(２)の排気弁間肉壁(13)に設けた冷却通路(12)に冷却用
の媒体が通って、その排気弁間肉壁(13)を冷却すること
によって、上記シリンダヘッド(２)の排気弁間肉壁(13)
の高温化が抑えられる。The invention of claim 1 operates as follows, for example, as shown in FIGS. The high-temperature exhaust gas is discharged from the combustion chamber to the exhaust port (7) through the exhaust valves (5), so that the thickness between the exhaust valves of the cylinder head (2) located between the exhaust valves (5). The wall (13) tends to be heated by the exhaust gas, but the cylinder head
The cooling medium passes through the cooling passage (12) provided in the wall (13) between the exhaust valves (13), and cools the wall (13) between the exhaust valves. Exhaust valve wall (13)
Is suppressed.
【０００７】［請求項２］上記請求項２の発明は、上記
請求項１の発明の作用に加えて、さらに次のように作用
する。吸気弁(４)には比較的温度の低い吸気が通るた
め、各吸気弁(４)同士間に位置するシリンダヘッド(２)
の吸気弁間肉壁(14)は、各排気弁(５)同士間に位置する
シリンダヘッド(２)の排気弁間肉壁(13)に比して高温化
しにくい。[Claim 2] The invention of claim 2 operates as follows in addition to the effect of the invention of claim 1. Since relatively low temperature intake air passes through the intake valves (4), the cylinder head (2) located between each intake valve (4)
The inner wall (14) between the intake valves is hardly heated to a higher temperature than the inner wall (13) between the exhaust valves of the cylinder head (2) located between the exhaust valves (5).
【０００８】そして、高温化しやすいシリンダヘッド
(２)の排気弁間肉壁(13)に冷却通路(12)を設けて、その
排気弁間肉壁(13)を強力に冷却する一方で、高温化しに
くいシリンダヘッド(２)の吸気弁間肉壁(14)には冷却通
路(12)を設けないようにして、その吸気弁間肉壁(14)が
冷却用の媒体によってあまり冷却されないようにするこ
とにより、排気弁(５)の周辺のシリンダヘッド(２)と、
吸気弁(４)の周辺のシリンダヘッド(２)との温度差を小
さくできる。[0008] The cylinder head which is easily heated to a high temperature
A cooling passage (12) is provided in the wall (13) between the exhaust valves to cool the wall (13) between the exhaust valves vigorously while the intake valve of the cylinder head (2) is hardly heated. A cooling passage (12) is not provided in the interstitial wall (14) so that the interstitial wall (14) between the intake valves is not cooled too much by the cooling medium. Peripheral cylinder head (2),
The temperature difference between the intake valve (4) and the surrounding cylinder head (2) can be reduced.
【０００９】しかも、上記シリンダヘッド(２)の吸気弁
間肉壁(14)に冷却用の媒体が供給されない分だけ、その
冷却用の媒体が上記シリンダヘッド(２)の排気弁間肉壁
(13)の冷却通路(12)へ送られやすくなり、これによって
高温化しやすい排気弁(５)の周辺のシリンダヘッド(２)
をより強力に冷却できる。In addition, as much as the cooling medium is not supplied to the wall between intake valves (14) of the cylinder head (2), the cooling medium is supplied to the wall between exhaust valves of the cylinder head (2).
The cylinder head (2) around the exhaust valve (5), which is easily sent to the cooling passage (12) of (13) and thereby easily becomes hot.
Can be cooled more powerfully.
【００１０】[0010]
【発明の効果】［請求項１］上記請求項１の発明は、上
記のように構成され作用することから次の効果を奏す
る。複数の排気弁の間に位置するシリンダヘッドの排気
弁間肉壁に冷却通路を設けたので、その排気弁間肉壁が
強力に冷却されて高温化されにくくなる。従って、シリ
ンダヘッドの排気弁間肉壁に大きな熱歪みが生じること
を確実に防止でき、これによって排気弁がシリンダヘッ
ドの熱歪みによって不完全な状態に閉弁されたり、シリ
ンダヘッドが熱歪みによって破損することを確実に防止
できる。[Embodiment 1] The invention of the above-described embodiment 1 has the following effects because it is configured and operates as described above. Since the cooling passage is provided in the wall between the exhaust valves of the cylinder head located between the plurality of exhaust valves, the wall between the exhaust valves is cooled strongly and is hardly heated. Therefore, it is possible to reliably prevent a large thermal distortion from being generated on the wall between the exhaust valves of the cylinder head, thereby closing the exhaust valve in an incomplete state due to the thermal distortion of the cylinder head or causing the cylinder head to be thermally damaged. Damage can be reliably prevented.
【００１１】［請求項２］上記請求項２の発明は、上記
のように構成され作用することから、上記請求項１の発
明の効果に加えて、さらに次の効果を奏する。高温化し
やすいシリンダヘッドの排気弁間肉壁には冷却通路を設
けて、その排気弁間肉壁を強力に冷却する一方で、高温
化しにくいシリンダヘッドの吸気弁間肉壁には冷却通路
を設けないので、排気弁の周辺のシリンダヘッドと、吸
気弁の周辺のシリンダヘッドとの温度差を小さくでき
る。従って、シリンダヘッド全体での熱バランスが高く
維持され、シリンダヘッドの部位によって温度が異なる
ことによるシリンダヘッドの熱歪みをより確実に防止で
きる。[Claim 2] Since the invention of claim 2 is configured and operates as described above, it has the following effect in addition to the effect of the invention of claim 1. A cooling passage is provided in the wall between the exhaust valves of the cylinder head, which tends to increase the temperature, and the cooling wall is provided in the wall between the intake valves of the cylinder head, which cools the wall between the exhaust valves strongly while the wall between the exhaust valves is hardly heated Therefore, the temperature difference between the cylinder head around the exhaust valve and the cylinder head around the intake valve can be reduced. Therefore, the thermal balance of the entire cylinder head is maintained high, and the thermal distortion of the cylinder head due to the difference in temperature depending on the position of the cylinder head can be more reliably prevented.
【００１２】しかも、上記シリンダヘッドの吸気弁間肉
壁には冷却用の媒体を供給しなくてもよい分だけ、冷却
用の媒体がシリンダヘッドの排気弁間肉壁の冷却通路へ
送られやすくなり、これによって排気弁の周辺のシリン
ダヘッドをより強力に冷却できる。Further, the cooling medium is easily sent to the cooling passage in the wall between the exhaust valves of the cylinder head to the extent that the cooling medium does not need to be supplied to the wall between the intake valves of the cylinder head. As a result, the cylinder head around the exhaust valve can be cooled more strongly.
【００１３】[0013]
【発明の実施の形態】以下、本発明にかかる多弁式エン
ジンの冷却装置の実施の一形態を適用した多弁式の多気
筒ディーゼルエンジンについて図１から図３を用いて説
明する。図１は上記エンジンのシリンダヘッドの要部を
示す縦断面図、図２は図１のII−II線矢視断面図、図３
は上記エンジンの要部を示す縦断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A multi-valve multi-cylinder diesel engine to which an embodiment of a multi-valve engine cooling apparatus according to the present invention is applied will be described below with reference to FIGS. FIG. 1 is a longitudinal sectional view showing a main part of a cylinder head of the engine, FIG. 2 is a sectional view taken along line II-II of FIG.
FIG. 2 is a longitudinal sectional view showing a main part of the engine.
【００１４】上記エンジン(１)のシリンダヘッド(２)に
は、シリンダ(３)毎に２個で一対の吸気弁(４)と、２個
で一対の排気弁(５)とをそれぞれ配置してあり、それら
の各一対の吸気弁(４)と排気弁(５)とには、吸気ポート
(６)と排気ポート(７)とをそれぞれ接続してある。そし
て、各一対の吸気弁(４)と排気弁(５)とは、後述する動
弁装置によってそれぞれ同時に開閉駆動されるようにし
てある。また、上記シリンダヘッド(２)には、シリンダ
(３)毎に、燃焼室(11)内へ燃料噴射する燃料噴射ノズル
(８)と、冷機始動時に燃焼室(11)内の混合気を暖めるグ
ロープラグ(９)とを配置してある。In the cylinder head (2) of the engine (1), two pairs of intake valves (4) and two pairs of exhaust valves (5) are arranged for each cylinder (3). The pair of intake valve (4) and exhaust valve (5) have an intake port.
(6) and the exhaust port (7) are connected respectively. The pair of intake valves (4) and the exhaust valves (5) are simultaneously driven to open and close simultaneously by a valve gear described later. The cylinder head (2) has a cylinder
(3) Each time a fuel injection nozzle injects fuel into the combustion chamber (11)
(8) and a glow plug (9) for warming the air-fuel mixture in the combustion chamber (11) at the time of cold start.
【００１５】さらに、上記シリンダヘッド(２)には冷却
通路(12)を形成してあり、その冷却通路(12)を通った冷
却水が、ラジエータ(図示せず)やシリンダブロック(15)
の冷却通路(16)などを通って上記シリンダヘッド(２)の
冷却通路(12)へ循環するようにしてある。また、上記シ
リンダヘッド(２)の冷却通路(12)は、各シリンダ(３)で
の２個の排気弁(５)同士間に位置するシリンダヘッド
(２)の排気弁間肉壁(13)には設けてある一方で、各シリ
ンダ(３)での２個の吸気弁(４)同士間に位置するシリン
ダヘッド(２)の吸気弁間肉壁(14)には設けないようにし
てある。Further, a cooling passage (12) is formed in the cylinder head (2), and cooling water passing through the cooling passage (12) is supplied to a radiator (not shown) or a cylinder block (15).
Circulating through the cooling passage (16) of the cylinder head (2) to the cooling passage (12) of the cylinder head (2). Further, the cooling passage (12) of the cylinder head (2) is provided between the two exhaust valves (5) of each cylinder (3).
The wall between the intake valves of the cylinder head (2) located between the two intake valves (4) in each cylinder (3) while being provided on the wall (13) between the exhaust valves of (2). It is not provided on the wall (14).
【００１６】このようにシリンダヘッド(２)の冷却通路
(12)を構成してあることにより、次の作用を得ることが
できる。即ち、上記シリンダヘッド(２)の排気弁間肉壁
(13)は、燃焼室(11)から排気弁(５)を通って排気ポート
(７)へ排出される高温の排気ガスによって熱せられて高
温化しやすいが、上記排気弁間肉壁(13)の冷却通路(12)
を通る冷却水によって上記排気弁間肉壁(13)が冷却され
ることで、上記排気弁間肉壁(13)の高温化が防がれる。
また、吸気ポート(６)及び吸気弁(４)には比較的温度の
低い吸気が通るため、上記シリンダヘッド(２)の吸気弁
間肉壁(14)は高温化しにくいので、その吸気弁間肉壁(1
4)に冷却通路(12)を設けないことで、その吸気弁間肉壁
(14)が冷却水で冷却され過ぎることが防がれる。As described above, the cooling passage of the cylinder head (2)
With the configuration (12), the following operation can be obtained. That is, the wall between the exhaust valves of the cylinder head (2).
(13) is an exhaust port from the combustion chamber (11) through the exhaust valve (5).
Although it is likely to be heated to a high temperature by the high-temperature exhaust gas discharged to (7), the cooling passage (12) in the wall (13) between the exhaust valves described above.
By cooling the inter-exhaust-valve wall (13) with the cooling water passing therethrough, the exhaust-wall inter-wall wall (13) is prevented from becoming hot.
Also, since relatively low-temperature intake air passes through the intake port (6) and the intake valve (4), the wall (14) between the intake valves of the cylinder head (2) is hardly heated to a high temperature. Meat wall (1
By not providing the cooling passage (12) in 4), the wall between the intake valves
(14) is prevented from being excessively cooled by the cooling water.
【００１７】一方、上記グロープラグ(９)は、図３に示
すように、次のようにしてシリンダヘッド(２)に設けら
れる。即ち、シリンダヘッド(２)にプラグ挿通孔(17)を
貫通させるとともに、そのプラグ挿通孔(17)の上部に雌
ねじを形成してある。また、上記グロープラグ(９)のプ
ラグ本体(9a)の上部に雄ねじを形成してある。そして、
上記プラグ本体(9a)を上記プラグ挿通孔(17)に挿入し、
そのプラグ本体(9a)の雄ねじを上記プラグ挿通孔(17)の
雌ねじに螺合させたときには、上記プラグ本体(9a)の中
間部での周面の一部が、吸気ポート(６)内に露出した状
態で、上記グロープラグ(９)がシリンダヘッド(２)に固
定される。なお、上記プラグ本体(9a)の下部はシール材
(図示せず)などによってシールされる。On the other hand, as shown in FIG. 3, the glow plug (9) is provided on the cylinder head (2) as follows. That is, the plug insertion hole (17) is made to pass through the cylinder head (2), and a female screw is formed on the upper portion of the plug insertion hole (17). The glow plug (9) has an external thread formed on the upper part of the plug body (9a). And
Insert the plug body (9a) into the plug insertion hole (17),
When the male screw of the plug body (9a) is screwed into the female screw of the plug insertion hole (17), a part of the peripheral surface at the intermediate portion of the plug body (9a) is inserted into the intake port (6). In the exposed state, the glow plug (9) is fixed to the cylinder head (2). The lower part of the plug body (9a) is a sealing material
(Not shown) or the like.
【００１８】上述の動弁装置は、次のように構成され
る。即ち、上記シリンダヘッド(２)の上面には、ロッカ
アームブラケット(21)を固定ボルト(22)で固定してあ
り、そのロッカアームブラケット(21)には、ロッカアー
ム軸(23)を支持してある。そのロッカアーム軸(23)に
は、吸気弁(４)と排気弁(５)とにそれぞれ対応させたロ
ッカアーム(24)を揺動可能に支持してある。つまり、吸
気弁用のロッカアーム(24)の出力部(25)には、弁ブリッ
ジ(27)を介して上記一対の吸気弁(４)が連結され、ま
た、排気弁用のロッカアーム(24)の出力部(25)には、弁
ブリッジ(27)を介して上記一対の排気弁(５)が連結され
る。The above-described valve train is configured as follows. That is, a rocker arm bracket (21) is fixed to the upper surface of the cylinder head (2) with fixing bolts (22), and the rocker arm bracket (21) supports a rocker arm shaft (23). A rocker arm (24) corresponding to an intake valve (4) and an exhaust valve (5) is swingably supported on the rocker arm shaft (23). That is, the pair of intake valves (4) is connected to the output portion (25) of the intake valve rocker arm (24) via the valve bridge (27). The pair of exhaust valves (5) are connected to the output section (25) via a valve bridge (27).
【００１９】そして、上記ロッカアーム(24)の入力部(2
6)には、プッシュロッド(28)の上端部(29)を連結してあ
る。そのプッシュロッド(28)は、動弁カム軸(図示せず)
に連動して上下揺動するようにしてある。これにより、
上記各一対の吸気弁(４)及び各一対の排気弁(５)は、そ
れぞれ同時に開閉駆動される。なお、上記ロッカアーム
ブラケット(21)の上端部には、ノズル押さえ板(30)が固
定されており、そのノズル押さえ板(30)によって上記燃
料噴射ノズル(８)の上端部が押さえられて、その燃料噴
射ノズル(８)の浮き上がりを防いでいる。The input section (2) of the rocker arm (24)
The upper end (29) of the push rod (28) is connected to 6). The push rod (28) is a valve operating cam shaft (not shown).
It swings up and down in conjunction with. This allows
The pair of intake valves (4) and the pair of exhaust valves (5) are simultaneously opened and closed. A nozzle pressing plate (30) is fixed to the upper end of the rocker arm bracket (21), and the upper end of the fuel injection nozzle (8) is pressed by the nozzle pressing plate (30). The fuel injection nozzle (8) is prevented from rising.
【００２０】上記の実施の形態は、次のように変更可能
である。即ち、上記説明では、排気弁(５)は各シリンダ
(３)に対して２個ずつ配置してあるが、排気弁(５)は各
シリンダ(３)に対して３個以上配置してもよい。この場
合でも、各シリンダ(３)での各排気弁(５)同士間に位置
するシリンダヘッド(２)の排気弁間肉壁(13)にそれぞれ
冷却通路(12)を設けることになる。また、吸気弁(４)
は、各シリンダ(３)に対して１個ずつ配置してもよく、
あるいは各シリンダ(３)に対して３個以上配置してもよ
い。The above embodiment can be modified as follows. That is, in the above description, the exhaust valve (5) is
Although two valves are arranged for each cylinder (3), three or more exhaust valves (5) may be arranged for each cylinder (3). Also in this case, the cooling passages (12) are provided in the exhaust valve thick wall (13) of the cylinder head (2) located between the exhaust valves (5) of the cylinders (3). In addition, intake valve (4)
May be arranged one for each cylinder (3),
Alternatively, three or more cylinders may be arranged for each cylinder (3).
【００２１】また、上記冷却通路(12)に流す冷却用の媒
体は、冷却水に限られるものではなく、例えばオイルで
あってもよい。さらに、本発明は、多弁式のガソリンエ
ンジンにも適用でき、また、単気筒のエンジンであって
も適用できることは言うまでもない。The cooling medium flowing through the cooling passage (12) is not limited to cooling water, but may be oil, for example. Further, it goes without saying that the present invention can be applied to a multi-valve gasoline engine, and can also be applied to a single cylinder engine.
【図１】本発明にかかる多弁式エンジンの冷却装置の実
施の一形態を適用した多弁式の多気筒ディーゼルエンジ
ンを示しており、そのエンジンのシリンダヘッドの要部
を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a multi-valve multi-cylinder diesel engine to which an embodiment of a multi-valve engine cooling device according to the present invention is applied, showing a main part of a cylinder head of the engine.
【図２】図１のII−II線矢視断面図である。FIG. 2 is a sectional view taken along line II-II of FIG.
【図３】上記エンジンの要部を示す縦断面図である。FIG. 3 is a longitudinal sectional view showing a main part of the engine.
２…シリンダヘッド、４…吸気弁、５…排気弁、12…冷
却通路、13…シリンダヘッドの排気弁間肉壁、14…シリ
ンダヘッドの吸気弁間肉壁。2 ... Cylinder head, 4 ... Intake valve, 5 ... Exhaust valve, 12 ... Cooling passage, 13 ... Wall wall between exhaust valve of cylinder head, 14 ... Wall wall between intake valve of cylinder head.
フロントページの続き (72)発明者 青島 貴司 大阪府堺市石津北町64 株式会社クボタ堺 製造所内Continued on the front page (72) Inventor Takashi Aoshima 64 Ishizukita-cho, Sakai-shi, Osaka Inside Kubota Sakai Works
Claims (2)
(５)を有する多弁式エンジンにおいて、 上記各排気弁(５)同士間に位置するシリンダヘッド(２)
の排気弁間肉壁(13)に冷却通路(12)を設け、その冷却通
路(12)に冷却用の媒体を通すように構成したことを特徴
とする多弁式エンジンの冷却装置。1. A plurality of exhaust valves for one cylinder (3)
In the multi-valve engine having (5), a cylinder head (2) located between the exhaust valves (5).
A cooling device for a multi-valve engine, characterized in that a cooling passage (12) is provided in the wall (13) between the exhaust valves, and a cooling medium is passed through the cooling passage (12).
装置において、 一のシリンダ(３)に対して複数の吸気弁(４)を有し、そ
れらの各吸気弁(４)同士間に位置するシリンダヘッド
(２)の吸気弁間肉壁(14)には冷却通路(12)を設けないよ
うに構成したことを特徴とする多弁式エンジンの冷却装
置。2. The cooling device for a multi-valve engine according to claim 1, wherein a plurality of intake valves (4) are provided for one cylinder (3), and between each intake valve (4). Located cylinder head
(2) A cooling device for a multi-valve engine, wherein a cooling passage (12) is not provided in a wall (14) between intake valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02498898A JP3586553B2 (en) | 1998-02-06 | 1998-02-06 | Multi-valve engine cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02498898A JP3586553B2 (en) | 1998-02-06 | 1998-02-06 | Multi-valve engine cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11223155A true JPH11223155A (en) | 1999-08-17 |
| JP3586553B2 JP3586553B2 (en) | 2004-11-10 |
Family
ID=12153373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02498898A Expired - Fee Related JP3586553B2 (en) | 1998-02-06 | 1998-02-06 | Multi-valve engine cooling system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3586553B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1335122A1 (en) * | 2002-02-12 | 2003-08-13 | Renault s.a.s. | Cylinder head for an internal combustion engine |
-
1998
- 1998-02-06 JP JP02498898A patent/JP3586553B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1335122A1 (en) * | 2002-02-12 | 2003-08-13 | Renault s.a.s. | Cylinder head for an internal combustion engine |
| FR2835883A1 (en) * | 2002-02-12 | 2003-08-15 | Renault | CYLINDER HEAD FOR INTERNAL COMBUSTION ENGINE |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3586553B2 (en) | 2004-11-10 |
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