JP2000345838A - Cooling device of water cooled type internal combustion engine - Google Patents
Cooling device of water cooled type internal combustion engineInfo
- Publication number
- JP2000345838A JP2000345838A JP11156236A JP15623699A JP2000345838A JP 2000345838 A JP2000345838 A JP 2000345838A JP 11156236 A JP11156236 A JP 11156236A JP 15623699 A JP15623699 A JP 15623699A JP 2000345838 A JP2000345838 A JP 2000345838A
- Authority
- JP
- Japan
- Prior art keywords
- water
- water jacket
- cylinder
- partition member
- cooling
- 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
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
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/108—Siamese-type cylinders, i.e. cylinders cast together
-
- 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
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/14—Cylinders with means for directing, guiding or distributing liquid stream
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】この発明は、水冷式内燃機関
の冷却装置に関する。The present invention relates to a cooling device for a water-cooled internal combustion engine.
【０００２】[0002]
【従来の技術】水冷式内燃機関では、シリンダヘッド、
シリンダブロックにウォータジャケットが形成されてい
る。2. Description of the Related Art In a water-cooled internal combustion engine, a cylinder head,
A water jacket is formed on the cylinder block.
【０００３】このシリンダブロックのウォータジャケッ
トとして、シリンダボアの周囲にボア下方までウォータ
ジャケットを形成した深底構造のものや、ウォータジャ
ケットをボア中間部位まで形成しボア下方には設けない
浅底構造のものが採用されている（特開平９−２３６０
３９号、９−１８９２５８号、７−３４９６３号公報等
参照）。The water jacket of this cylinder block has a deep-bottom structure in which a water jacket is formed around the cylinder bore to the lower side of the bore, or a shallow-bottom structure in which the water jacket is formed to an intermediate portion of the bore and is not provided below the bore. (Japanese Patent Laid-Open No. 9-2360)
39, 9-189258, 7-34963, etc.).
【０００４】[0004]
【発明が解決しようとする課題】この深底構造のもの
は、熱源としての燃焼室に近いボア上方は適度に冷却さ
れるが、燃焼室から遠いボア下方が過冷却されることに
より、図１０のようにボア上方とボア下方での温度差が
大きくなり、歪みを生じやすくなる。その分、ピストン
リングの張力を高く設定するため、フリクション増大の
要因となっている。In the case of this deep-bottom structure, the upper part of the bore near the combustion chamber as a heat source is appropriately cooled, but the lower part of the bore far from the combustion chamber is supercooled. As described above, the temperature difference between the upper part of the bore and the lower part of the bore becomes large, and the distortion is likely to occur. As a result, the tension of the piston ring is set higher, which causes an increase in friction.
【０００５】一方、浅底構造のものは、このような歪み
を抑えるために、ボア下方の冷却を行わず、図１１のよ
うにボア上方とボア下方での温度差を低減している。On the other hand, in the case of the shallow bottom structure, in order to suppress such distortion, cooling below the bore is not performed, and the temperature difference between the upper part and the lower part of the bore is reduced as shown in FIG.
【０００６】しかし、この浅底構造のものは、ウォータ
ジャケットの面積が減少する分、ボア部でのエンジン油
の冷却機能を損なうことになる。従来、ボア部でのエン
ジン油の冷却効果は大きく、その冷却機能の低下が潤滑
性能の悪化を招きかねないのである。However, in the case of this shallow bottom structure, the function of cooling the engine oil in the bore is impaired by the reduced area of the water jacket. Conventionally, the cooling effect of the engine oil in the bore portion is large, and the deterioration of the cooling function may lead to the deterioration of the lubrication performance.
【０００７】この発明は、このような問題点を解決する
ことを目的としている。An object of the present invention is to solve such a problem.
【０００８】[0008]
【課題を解決するための手段】第１の発明は、シリンダ
ボア周囲にウォータジャケットを有するシリンダブロッ
クを備えた水冷式内燃機関の冷却装置において、前記ウ
ォータジャケットをシリンダ軸方向の所定の高さにて上
部と下部に仕切る仕切部材を設け、このウォータジャケ
ット上部とウォータジャケット下部に別系統に冷却水を
流すようにする。According to a first aspect of the present invention, there is provided a cooling device for a water-cooled internal combustion engine having a cylinder block having a water jacket around a cylinder bore, wherein the water jacket is provided at a predetermined height in a cylinder axial direction. A partition member is provided at an upper part and a lower part, and cooling water is supplied to a separate system between the upper part of the water jacket and the lower part of the water jacket.
【０００９】第２の発明は、第１の発明において、前記
ウォータジャケット上部の冷却水流量を、ウォータジャ
ケット下部の冷却水流量よりも相対的に大きくする。In a second aspect based on the first aspect, the flow rate of the cooling water at the upper portion of the water jacket is relatively larger than the flow rate of the cooling water at the lower portion of the water jacket.
【００１０】第３の発明は、第２の発明において、前記
仕切部材の位置は、ピストン上死点におけるピストンリ
ングの高さと略同等もしくはそれよりわずかに下方とす
る。[0010] In a third aspect based on the second aspect, the position of the partition member is substantially equal to or slightly lower than the height of the piston ring at the piston top dead center.
【００１１】第４の発明は、第１〜第３の発明におい
て、前記仕切部材は、シリンダブロックとシリンダヘッ
ドとの間に介装されるシリンダヘッドガスケットに一体
的に取り付けられる。In a fourth aspect based on the first to third aspects, the partition member is integrally attached to a cylinder head gasket interposed between the cylinder block and the cylinder head.
【００１２】第５の発明は、第１〜第４の発明におい
て、前記仕切部材に、シリンダ列方向の前方側と後方側
の位置に、それぞれウォータジャケット上部とウォータ
ジャケット下部とを連通する連通口を設ける。According to a fifth aspect of the present invention, in the first to fourth aspects of the invention, the partition member has a communication port for communicating an upper portion of the water jacket and a lower portion of the water jacket at positions on the front side and the rear side in the cylinder row direction, respectively. Is provided.
【００１３】第６の発明は、第４の発明において、前記
シリンダヘッドガスケットに形成される冷却水の導口に
第１の係止片を、これに対応して前記仕切部材に第２の
係止片をそれぞれ設け、これらの係止片を介して仕切部
材をシリンダヘッドガスケットに取り付けるようになっ
ている。According to a sixth aspect of the present invention, in the fourth aspect, a first locking piece is provided in a cooling water guide port formed in the cylinder head gasket, and a second locking member is correspondingly provided in the partition member. Stop pieces are provided, and the partition member is attached to the cylinder head gasket via these locking pieces.
【００１４】[0014]
【発明の効果】第１の発明によれば、シリンダブロック
上部（シリンダボア上部側）と下部（シリンダボア下部
側）の冷却の程度を任意に設定可能であり、良好な冷却
機能を得るための設計の自由度に優れる。According to the first aspect of the invention, the degree of cooling of the upper part (upper side of the cylinder bore) and the lower part (lower side of the cylinder bore) of the cylinder block can be arbitrarily set, and a design for obtaining a good cooling function can be obtained. Excellent flexibility.
【００１５】第２の発明によれば、第１の発明の効果に
加え、シリンダボア上部側と下部側の温度差を低減し、
シリンダボアの歪みを低減できると共に、シリンダボア
部でのエンジン油の十分な冷却機能を維持することがで
きる。According to the second aspect, in addition to the effect of the first aspect, the temperature difference between the upper side and the lower side of the cylinder bore is reduced,
The distortion of the cylinder bore can be reduced, and a sufficient function of cooling the engine oil in the cylinder bore can be maintained.
【００１６】第３の発明によれば、第２の発明の効果に
加え、燃焼室に近く熱流束の大きいシリンダブロック上
部を効率よく冷却することができる。According to the third aspect, in addition to the effect of the second aspect, the upper part of the cylinder block which is close to the combustion chamber and has a large heat flux can be efficiently cooled.
【００１７】第４の発明によれば、第１〜第３の発明の
効果に加え、シリンダブロックのウォータジャケットを
特別な形状とする必要がなく、製造性に優れ、コストも
低くすむ。According to the fourth aspect, in addition to the effects of the first to third aspects, it is not necessary to form the water jacket of the cylinder block into a special shape, so that the manufacturability is excellent and the cost is low.
【００１８】第５の発明によれば、第１〜第４の発明の
効果に加え、ウォータジャケット下部に所要量の冷却水
を流すことができる。According to the fifth aspect, in addition to the effects of the first to fourth aspects, a required amount of cooling water can be caused to flow under the water jacket.
【００１９】第６の発明によれば、第４の発明の効果に
加え、シリンダヘッドガスケットの形成が複雑になるこ
とがなく、仕切部材を簡単に取り付けることができる。
この場合、シリンダヘッドガスケットの第１の係止片を
孔の部分から出すので、１枚のガスケットシートから部
材取りができる。According to the sixth aspect, in addition to the effect of the fourth aspect, the formation of the cylinder head gasket does not become complicated, and the partition member can be easily attached.
In this case, since the first locking piece of the cylinder head gasket is protruded from the hole, the member can be removed from one gasket sheet.
【００２０】[0020]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００２１】図１はエンジンのシリンダブロック１０に
形成されるウォータジャケット１１ならびにそのウォー
タジャケット１１内に配設される仕切部材１２を概略的
に示してあり、図２はその仕切部材１２の平面図（平面
展開図）を示してある。FIG. 1 schematically shows a water jacket 11 formed on a cylinder block 10 of an engine and a partition member 12 disposed in the water jacket 11. FIG. 2 is a plan view of the partition member 12. (Plan view).
【００２２】シリンダブロック１０のウォータジャケッ
ト１１は、各シリンダボア１３の周りを囲うと共に、深
底構造にボア１３下部側まで形成される。The water jacket 11 of the cylinder block 10 surrounds each of the cylinder bores 13 and is formed in a deep bottom structure to the lower side of the bore 13.
【００２３】シリンダブロック１０の側部には、例えば
エンジン前端側のシリンダの側方の所定の位置に図示し
ないウォータポンプから送られる冷却水の入口部１４が
形成され、この入口部１４はウォータジャケット１１な
らびに図示しないシリンダヘッドのウォータジャケット
に接続される。On the side of the cylinder block 10, an inlet 14 for cooling water sent from a water pump (not shown) is formed at a predetermined position on the side of the cylinder at the front end of the engine, for example. 11 and a water jacket of a cylinder head (not shown).
【００２４】仕切部材１２は、ステンレス等からなり、
シリンダブロック１０のウォータジャケット１１の水平
断面形状とほぼ同等の形状に形成される。仕切部材１２
には、前記冷却水の入口部１４に近いシリンダ列方向の
前方側（エンジン前端側）に小孔の連通口１５が形成さ
れ、遠いシリンダ列方向の後方側（エンジン後端側）に
端部を切り欠いて略弧状の連通口１６が形成される。The partition member 12 is made of stainless steel or the like.
It is formed in a shape substantially equal to the horizontal sectional shape of the water jacket 11 of the cylinder block 10. Partition member 12
A communication port 15 of a small hole is formed on the front side (engine front end side) in the cylinder row direction near the cooling water inlet section 14 and on the rear side (engine rear end side) in the distant cylinder row direction. Is cut out to form a substantially arcuate communication port 16.
【００２５】シリンダブロック１０とシリンダヘッドの
間には、各シリンダをシール、およびシリンダブロック
１０のウォータジャケット１１とシリンダヘッドのウォ
ータジャケットを隔成するシリンダヘッドガスケット１
７が介装される。Between the cylinder block 10 and the cylinder head, each cylinder is sealed, and the cylinder head gasket 1 for separating the water jacket 11 of the cylinder block 10 from the water jacket of the cylinder head.
7 are interposed.
【００２６】シリンダヘッドガスケット１７には、図３
のように各シリンダボア１３に対する開口１８およびヘ
ッドボルトの通し穴１９ならびに前記冷却水の入口部１
４に対応する部分に入口部１４とシリンダヘッドのウォ
ータジャケットを接続するための開口２０（導口）およ
びその開口２０から遠いシリンダ列方向の後方側（エン
ジン後端側）にシリンダブロック１０のウォータジャケ
ット１１の出口２１（導口）が形成される。As shown in FIG.
The opening 18 for each cylinder bore 13 and the through hole 19 for the head bolt and the cooling water inlet 1
An opening 20 for connecting the inlet section 14 and the water jacket of the cylinder head to a portion corresponding to the cylinder head 4 and a water of the cylinder block 10 on the rear side (engine rear end side) in the cylinder row direction far from the opening 20. An outlet 21 (guiding port) of the jacket 11 is formed.
【００２７】そして、仕切部材１２は、シリンダヘッド
ガスケット１７に一体的に取り付けられ、シリンダブロ
ック１０のウォータジャケット１１内に配設される。The partition member 12 is integrally attached to the cylinder head gasket 17 and is disposed in the water jacket 11 of the cylinder block 10.
【００２８】この場合、シリンダヘッドガスケット１７
の開口部となる前記開口２０および出口２１にそれぞれ
突片（第１の係止片）２２,２３が形成され、これらの
突片２２,２３に対応して、仕切部材１２に前記冷却水
の入口部１４に対応する部位および連通口１６の形成部
位にそれぞれ突片（第２の係止片）２４,２５が形成さ
れる。これらのシリンダヘッドガスケット１７の突片２
２,２３、仕切部材１２の突片２４,２５は、図４のよう
に折り曲げられ、それぞれ対応する突片２２,２３,２
４,２５がかしめ等によって連結されて、シリンダヘッ
ドガスケット１７に仕切部材１２が取り付けられる。In this case, the cylinder head gasket 17
Projecting pieces (first locking pieces) 22 and 23 are respectively formed in the opening 20 and the outlet 21 which are openings of the cooling water, and the cooling water is supplied to the partition member 12 corresponding to the projecting pieces 22 and 23. Protrusions (second locking pieces) 24 and 25 are formed at a portion corresponding to the inlet portion 14 and a portion where the communication port 16 is formed, respectively. The projecting pieces 2 of these cylinder head gaskets 17
2, 23, and the projections 24, 25 of the partition member 12 are bent as shown in FIG.
The partition members 12 are attached to the cylinder head gasket 17 by connecting the members 4 and 25 by caulking or the like.
【００２９】そして、図１、図５〜図７のように、仕切
部材１２を取り付けたシリンダヘッドガスケット１７
が、仕切部材１２をシリンダブロック１０のウォータジ
ャケット１１内に挿入して、シリンダブロック１０とシ
リンダヘッドの間に介装され、仕切部材１２が、シリン
ダ軸方向の所定の高さ（シリンダブロック１０の上端面
から所定の深さ）にてウォータジャケット１１を上部２
６と下部２７に仕切るように配設される。Then, as shown in FIGS. 1 and 5 to 7, the cylinder head gasket 17 with the partition member 12 attached thereto.
Is inserted between the cylinder block 10 and the cylinder head by inserting the partition member 12 into the water jacket 11 of the cylinder block 10 so that the partition member 12 has a predetermined height in the cylinder axial direction (the height of the cylinder block 10). The water jacket 11 is placed in the upper portion 2 at a predetermined depth from the upper end surface).
6 and the lower part 27.
【００３０】この仕切部材１２の位置は、図６のように
ピストン２８の上死点における下部のピストンリング２
９の高さと略同等もしくはそれよりわずかに下方となる
ように設定される。また、前記冷却水の入口部１４は、
仕切部材１２で仕切られたウォータジャケット上部２６
に接続するように形成される。As shown in FIG. 6, the position of the partition member 12 is determined by the lower piston ring 2 at the top dead center of the piston 28.
9 is set so as to be substantially equal to or slightly lower than the height. The cooling water inlet 14 is
Water jacket upper part 26 partitioned by partition member 12
It is formed so that it may be connected to.
【００３１】なお、ウォータポンプから送られる冷却水
の流れは、シリンダヘッドのウォータジャケットとシリ
ンダブロック１０のウォータジャケット１１に分けられ
るが、その比は略７：３とする。The flow of the cooling water sent from the water pump is divided into the water jacket of the cylinder head and the water jacket 11 of the cylinder block 10, and the ratio is approximately 7: 3.
【００３２】このように構成したので、ウォータポンプ
から送られる冷却水は、図８のように入口部１４から、
シリンダヘッドのウォータジャケットに導入されると共
に、シリンダブロック１０の仕切部材１２で仕切られた
ウォータジャケット上部２６に導入される。With this configuration, the cooling water sent from the water pump flows through the inlet 14 as shown in FIG.
While being introduced into the water jacket of the cylinder head, it is introduced into the water jacket upper portion 26 partitioned by the partition member 12 of the cylinder block 10.
【００３３】そして、このウォータジャケット上部２６
に導入された冷却水は、燃焼室に近いシリンダボア１３
上部側（シリンダブロック１０上部）を冷却しながらシ
リンダ列方向下流側に流れ、シリンダヘッドガスケット
１７に形成されたウォータジャケット１１の出口２１よ
りシリンダヘッドのウォータジャケットの冷却水下流側
に合流される。Then, this water jacket upper part 26
The cooling water introduced into the cylinder bores 13 near the combustion chamber.
While cooling the upper part (upper part of the cylinder block 10), it flows downstream in the cylinder row direction, and joins the cooling water downstream side of the water jacket of the cylinder head from the outlet 21 of the water jacket 11 formed in the cylinder head gasket 17.
【００３４】また、ウォータジャケット上部２６に導入
された冷却水は、一部が仕切部材１２に設けられた小孔
の連通口１５からウォータジャケット下部２７に入り、
燃焼室から遠いシリンダボア１３下部側（シリンダブロ
ック１０下部）を冷却しながらシリンダ列方向下流側に
流れ、略弧状の連通口１６からウォータジャケット上部
２６に出て、ウォータジャケット１１の出口２１よりシ
リンダヘッドのウォータジャケットの冷却水下流側に合
流される。このウォータジャケット下部２７の冷却水流
量は、ウォータジャケット上部２６の冷却水流量の１／
１０程度になるように、連通口１５の開口面積等が設定
される。A part of the cooling water introduced into the upper part of the water jacket 26 enters the lower part 27 of the water jacket through the communication hole 15 of the small hole provided in the partition member 12.
While cooling the lower part of the cylinder bore 13 (lower part of the cylinder block 10) far from the combustion chamber, it flows downstream in the cylinder row direction, exits from the substantially arcuate communication port 16 to the upper part of the water jacket 26, and from the outlet 21 of the water jacket 11 to the cylinder head. To the downstream side of the cooling water of the water jacket. The flow rate of the cooling water in the lower part of the water jacket 27 is 1 / th of the flow rate of the cooling water in the upper part 26 of the water jacket.
The opening area and the like of the communication port 15 are set so as to be about 10.
【００３５】なお、合流後の冷却水は、シリンダヘッド
のウォータジャケットのエンジン後端側に設けられた図
示しない冷却水の出口部より排出される。The cooling water after the merging is discharged from a cooling water outlet (not shown) provided on the rear end side of the engine of the water jacket of the cylinder head.
【００３６】そのため、燃焼室に近く熱流束の大きい、
ピストン２８の上死点におけるほぼピストンリングまで
のシリンダボア１３上部側（シリンダブロック１０上
部）を優先的に効率よく冷却することができ、またシリ
ンダボア１３下部側（シリンダブロック１０下部）も冷
却することができる。Therefore, the heat flux is large near the combustion chamber.
It is possible to preferentially and efficiently cool the upper part of the cylinder bore 13 (upper part of the cylinder block 10) up to the piston ring at the top dead center of the piston 28, and also to cool the lower part of the cylinder bore 13 (lower part of the cylinder block 10). it can.
【００３７】図９に示すように、従来の深底構造のもの
（図１０参照）ならびに浅底構造のもの（図１１参照）
と比べてシリンダボア１３部（シリンダブロック１０）
を適正に冷却することができ、ボア１３上部側とボア１
３下部側での温度差を十分に低減することができる。As shown in FIG. 9, a conventional deep-bottom structure (see FIG. 10) and a shallow-bottom structure (see FIG. 11)
13 cylinder bores (cylinder block 10)
Can be properly cooled, and the upper side of the bore 13 and the bore 1 can be cooled.
3 The temperature difference on the lower side can be sufficiently reduced.
【００３８】したがって、シリンダボア１３の歪みを低
減でき、フリクションを低減して、エンジンの燃費を向
上できる。また、シリンダボア１３下部側（シリンダブ
ロック１０下部）の冷却も行えるため、シリンダボア１
３部でのエンジン油の十分な冷却機能を維持することが
でき、良好な潤滑性能を確保できる。Therefore, distortion of the cylinder bore 13 can be reduced, friction can be reduced, and fuel efficiency of the engine can be improved. Also, since the lower part of the cylinder bore 13 (the lower part of the cylinder block 10) can be cooled, the cylinder bore 1
A sufficient cooling function of the engine oil in the three parts can be maintained, and good lubrication performance can be secured.
【００３９】一方、仕切部材１２をシリンダヘッドガス
ケット１７に取り付けて、ウォータジャケット１１を上
下に仕切る構造により、ウォータジャケット１１を特別
な形状とする必要がなく、シリンダブロック１０の製造
性に優れ、コストも低くすむ。On the other hand, the structure in which the partition member 12 is attached to the cylinder head gasket 17 to partition the water jacket 11 up and down does not require the water jacket 11 to have a special shape. Need only be low.
【００４０】また、冷却水の入口部１４をウォータジャ
ケット上部２６に接続すると共に、仕切部材１２のシリ
ンダ列方向前方側と後方側に連通口１５,１６を設けた
ため、ウォータジャケット上部２６に十分に冷却水を流
しつつ、ウォータジャケット下部２７に所要量の冷却水
を流すことができる。Further, since the cooling water inlet 14 is connected to the upper portion 26 of the water jacket, and the partition members 12 are provided with communication ports 15 and 16 at the front and rear sides in the cylinder row direction, the upper portion 26 of the water jacket is sufficiently provided. While flowing the cooling water, a required amount of the cooling water can be flowed into the lower portion 27 of the water jacket.
【００４１】また、シリンダヘッドガスケット１７の冷
却水の導口（開口２０、出口２１）を利用して、仕切部
材１２を取り付ける係止片２２,２３を形成するので、
シリンダヘッドガスケット１７の形成が複雑になること
がなく、仕切部材１２を簡単に取り付けることができ
る。この場合、シリンダヘッドガスケット１７から係止
片２２,２３を出すに当たって、その冷却水の導口（開
口２０、出口２１）つまり孔の部分から係止片２２,２
３を出したので、別途に係止片を設けることなく、１枚
のガスケットシートから部材取りができる。Also, the locking pieces 22 and 23 for attaching the partition member 12 are formed by using the cooling water inlets (opening 20 and outlet 21) of the cylinder head gasket 17, so that the locking pieces 22 and 23 are formed.
The partition member 12 can be easily attached without complicating the formation of the cylinder head gasket 17. In this case, when the locking pieces 22 and 23 are taken out from the cylinder head gasket 17, the cooling water guide holes (opening 20 and outlet 21), that is, the locking pieces 22 and 2 are inserted through the holes.
Since 3 is provided, a member can be removed from one gasket sheet without separately providing a locking piece.
【図１】実施の形態を示す概略配置図である。FIG. 1 is a schematic layout diagram showing an embodiment.
【図２】仕切部材の展開平面図である。FIG. 2 is a developed plan view of a partition member.
【図３】シリンダヘッドガスケットの平面図である。FIG. 3 is a plan view of a cylinder head gasket.
【図４】シリンダヘッドガスケットと仕切部材の取付前
の斜視図である。FIG. 4 is a perspective view before a cylinder head gasket and a partition member are attached.
【図５】シリンダヘッドガスケットと仕切部材の取付状
態を示す平面図である。FIG. 5 is a plan view showing a mounting state of a cylinder head gasket and a partition member.
【図６】シリンダヘッドガスケットと仕切部材の配置図
である。FIG. 6 is an arrangement diagram of a cylinder head gasket and a partition member.
【図７】図５のＹ−Ｙ線断面図である。FIG. 7 is a sectional view taken along line YY of FIG. 5;
【図８】冷却水の流れを示す状態図である。FIG. 8 is a state diagram showing a flow of cooling water.
【図９】シリンダボアの冷却特性図である。FIG. 9 is a cooling characteristic diagram of a cylinder bore.
【図１０】従来の冷却特性図である。FIG. 10 is a conventional cooling characteristic diagram.
【図１１】従来の冷却特性図である。FIG. 11 is a conventional cooling characteristic diagram.
１０ シリンダブロック １１ ウォータジャケット １２ 仕切部材 １３ シリンダボア １４ 入口部 １５,１６ 連通口 １７ シリンダヘッドガスケット ２０ 開口 ２１ 出口 ２２,２３ 突片 ２４,２５ 突片 ２６ ウォータジャケット上部 ２７ ウォータジャケット下部 ２９ ピストンリング DESCRIPTION OF SYMBOLS 10 Cylinder block 11 Water jacket 12 Partition member 13 Cylinder bore 14 Inlet part 15,16 Communication port 17 Cylinder head gasket 20 Opening 21 Outlet 22,22 Projection piece 24,25 Projection piece 26 Water jacket upper part 27 Water jacket lower part 29 Piston ring
Claims (6)
を有するシリンダブロックを備えた水冷式内燃機関の冷
却装置において、 前記ウォータジャケットをシリンダ軸方向の所定の高さ
にて上部と下部に仕切る仕切部材を設け、 このウォータジャケット上部とウォータジャケット下部
に別系統に冷却水を流すことを特徴とする水冷式内燃機
関の冷却装置。1. A cooling device for a water-cooled internal combustion engine provided with a cylinder block having a water jacket around a cylinder bore, comprising: a partition member that partitions the water jacket into an upper part and a lower part at a predetermined height in a cylinder axial direction; A cooling device for a water-cooled internal combustion engine, wherein cooling water flows in separate systems between the upper part of the water jacket and the lower part of the water jacket.
量を、ウォータジャケット下部の冷却水流量よりも相対
的に大きくした請求項１に記載の水冷式内燃機関の冷却
装置。2. The cooling device for a water-cooled internal combustion engine according to claim 1, wherein the flow rate of the cooling water in the upper portion of the water jacket is relatively larger than the flow rate of the cooling water in the lower portion of the water jacket.
におけるピストンリングの高さと略同等もしくはそれよ
りわずかに下方とした請求項２に記載の水冷式内燃機関
の冷却装置。3. The cooling device for a water-cooled internal combustion engine according to claim 2, wherein the position of the partition member is substantially equal to or slightly lower than the height of the piston ring at the piston top dead center.
リンダヘッドとの間に介装されるシリンダヘッドガスケ
ットに一体的に取り付けられる請求項１〜３のいずれか
１つに記載の水冷式内燃機関の冷却装置。4. The water-cooled internal combustion engine according to claim 1, wherein the partition member is integrally attached to a cylinder head gasket interposed between the cylinder block and the cylinder head. Cooling system.
側と後方側の位置に、それぞれウォータジャケット上部
とウォータジャケット下部とを連通する連通口を設けた
請求項１〜４のいずれか１つに記載の水冷式内燃機関の
冷却装置。5. The partition member according to claim 1, wherein communication ports are provided at front and rear positions in the cylinder row direction for communicating an upper portion of the water jacket and a lower portion of the water jacket, respectively. 3. The cooling device for a water-cooled internal combustion engine according to claim 1.
れる冷却水の導口に第１の係止片を、これに対応して前
記仕切部材に第２の係止片をそれぞれ設け、これらの係
止片を介して仕切部材をシリンダヘッドガスケットに取
り付けるようになっている請求項４に記載の水冷式内燃
機関の冷却装置。6. A first locking piece is provided at a cooling water guide port formed in the cylinder head gasket, and a second locking piece is provided at the partition member corresponding to the first locking piece. The cooling device for a water-cooled internal combustion engine according to claim 4, wherein the partition member is attached to the cylinder head gasket via a piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11156236A JP2000345838A (en) | 1999-06-03 | 1999-06-03 | Cooling device of water cooled type internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11156236A JP2000345838A (en) | 1999-06-03 | 1999-06-03 | Cooling device of water cooled type internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000345838A true JP2000345838A (en) | 2000-12-12 |
Family
ID=15623357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11156236A Pending JP2000345838A (en) | 1999-06-03 | 1999-06-03 | Cooling device of water cooled type internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000345838A (en) |
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