JP3417832B2 - Cooling structure of internal combustion engine - Google Patents

Cooling structure of internal combustion engine

Info

Publication number
JP3417832B2
JP3417832B2 JP08144398A JP8144398A JP3417832B2 JP 3417832 B2 JP3417832 B2 JP 3417832B2 JP 08144398 A JP08144398 A JP 08144398A JP 8144398 A JP8144398 A JP 8144398A JP 3417832 B2 JP3417832 B2 JP 3417832B2
Authority
JP
Japan
Prior art keywords
water
wall
cooling water
block
cylinder
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.)
Expired - Fee Related
Application number
JP08144398A
Other languages
Japanese (ja)
Other versions
JPH11280538A (en
Inventor
則彦 笠原
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 JP08144398A priority Critical patent/JP3417832B2/en
Publication of JPH11280538A publication Critical patent/JPH11280538A/en
Application granted granted Critical
Publication of JP3417832B2 publication Critical patent/JP3417832B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0696—W-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder wall
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/20—Multi-cylinder engines with cylinders all in one line
    • 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
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream 
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1816—Number of cylinders four
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/34—Lateral camshaft position
    • 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
    • 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
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • 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
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Description

【発明の詳細な説明】 【０００１】 【発明の属する技術分野】この発明は、内燃機関の冷却
構造に関する。 【０００２】 【従来の技術】ウェットライナ式のシリンダブロック
は、シリンダライナの外周にウォータジャケットを形成
している。 【０００３】このウォータジャケットにはシリンダ配列
方向に沿ってウォータジャケット外壁に設けられた冷却
水通路より冷却水が導入され、シリンダライナの冷却を
行うと共に、シリンダライナを冷却した冷却水はウォー
タジャケットの上部に設けられた導孔よりシリンダヘッ
ドのウォータジャケットに導かれ、シリンダヘッド各部
の冷却を行う。 【０００４】また、ウォータポンプからの冷却水をシリ
ンダブロックのウォータジャケットとシリンダヘッドの
ウォータジャケットに別々に供給するものもある（特開
平５ー８６９７０号、６ー３７５２３号公報等参照）。 【０００５】 【発明が解決しようとする課題】しかしながら、シリン
ダライナの外周のウォータジャケットに導入した冷却水
をそのウォータジャケットの上部の導孔よりシリンダヘ
ッド側に導くものでは、シリンダヘッドの熱負荷の大き
い部位つまり排気ポート側のシリンダヘッド下壁の良好
な冷却性が得られない。 【０００６】また、冷却水をシリンダブロック側とシリ
ンダヘッド側に別々に供給するものでも、シリンダヘッ
ド側の供給位置等によっては、同じく排気ポート側のシ
リンダヘッド下壁の良好な冷却性が得られないという問
題がある。 【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。 【０００８】 【課題を解決するための手段】第１の発明は、ウェット
式のシリンダライナの周囲にウォータジャケットを形成
するシリンダブロックを有する内燃機関の冷却構造にお
いて、シリンダブロックのウォータジャケット外壁とブ
ロック上壁とブロック外壁とで囲われる空間をシリンダ
ブロックのライナ装着部の全体にわたって設けて、その
うち機関排気経路側の空間を冷却水空間として形成し、
前記冷却水空間側かつライナ装着部の下部側にてブロッ
ク外壁表面に潤滑オイルを冷却するオイルクーラ用のウ
ォータギャラリを形成し、ウォータポンプからオイルク
ーラ用のウォータギャラリを通過した冷却水を前記冷却
水空間に導く冷却水入口をブロック外壁に、前記冷却水
空間の冷却水をシリンダライナの周囲のウォータジャケ
ットに導く開口をウォータジャケット外壁にそれぞれ形
成すると共に、前記冷却水空間の上部およびシリンダラ
イナの周囲のウォータジャケットの上部のブロック上壁
に冷却水をシリンダヘッドのウォータジャケットに導く
導孔をそれぞれ形成する。 【０００９】 【００１０】 【発明の効果】第１の発明によれば、シリンダブロッ
ク、シリンダライナの良好な冷却性を確保できると共
に、シリンダヘッド各部、熱負荷の大きい排気ポート側
のヘッド下壁の高い冷却性能を確保できる。 【００１１】 【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。 【００１２】図１はディーゼルエンジンの断面図、図２
はその冷却系統図で、１０はエンジンのシリンダブロッ
ク、１１はウェット式のシリンダライナ、１２はシリン
ダヘッド、１３はウォータポンプである。 【００１３】図１〜図４のように、シリンダブロック１
０のそれぞれシリンダライナ１１の回りには、ウォータ
ジャケット外壁１５によって、それぞれウォータジャケ
ット１６が形成される。隣合うシリンダの間のウォータ
ジャケット外壁１５は一体に形成される。 【００１４】このシリンダブロック１０の両側面に、シ
リンダ配列方向に沿うウォータジャケット外壁１５の外
側にそれぞれブロック外壁１７，１８が形成される。こ
の片側のウォータジャケット外壁１５とブロック外壁１
７とブロック上壁１４とで囲われる空間は冷却水通路空
間１９に、もう片側のウォータジャケット外壁１５とブ
ロック外壁１８とブロック上壁１４とで囲われる空間は
シリンダヘッド１２側からのオイルを戻すオイル戻し空
間２０に形成される。 【００１５】ウォータポンプ１３はシリンダブロック１
０の端部に設置され、ブロック外壁１７の表面にはウォ
ータポンプ１３から冷却水が送られるウォータギャラリ
３０が形成され、ウォータギャラリ３０にエンジンの潤
滑オイルを冷却するオイルクーラ３１が配設される。 【００１６】冷却水通路空間１９は、各シリンダの排気
の排出側（排気経路側）に形成される。冷却水通路空間
１９のブロック外壁１７には、ウォータギャラリ３０を
通過した冷却水を冷却水通路空間１９に導く冷却水入口
２１が設けられ、冷却水通路空間１９に面するウォータ
ジャケット外壁１５には、冷却水通路空間１９に入った
冷却水を各ウォータジャケット１６に導く開口２２が形
成される。 【００１７】この冷却水通路空間１９の上部ならびに各
ウォータジャケット１６の上部には、ブロック上壁１４
を貫通して、冷却水通路空間１９内ならびに各ウォータ
ジャケット１６内の冷却水をそれぞれシリンダヘッド１
２のウォータジャケット２６に送る導孔２３，２４が形
成される。 【００１８】図５のように、シリンダヘッド１２のウォ
ータジャケット２６の下部壁（ヘッド下壁）２７には、
前記導孔２３，２４に連通する連通孔２８，２９が形成
される。 【００１９】連通孔２８，２９には、それぞれ導孔２
３，２４より送られた冷却水を噴出するノズル（図示し
ない）が取付けられ、このうち前記冷却水通路空間１９
より冷却水が送られる連通孔２８のノズルは、その冷却
水を排気ポート３２の排気弁口３３，３４側に向けて噴
出するように設けられる。ただし、図５は図左側、右側
で、断面高さを異ならせて表している。 【００２０】なお、図中３５はシリンダヘッド１２のウ
ォータジャケット２６を通過した冷却水を、温度に応じ
て、ラジエータを介してあるいは直接バイパス通路３６
を介してウォータポンプ１３に戻すサーモスタットを示
す。 【００２１】このように構成したため、ウォータポンプ
１３から送られ、オイルクーラ３１用のウォータギャラ
リ３０を通過した冷却水は、エンジンの排気経路側に形
成され、ブロック外壁１７とブロック上壁１４とウォー
タジャケット外壁１５とで囲われる冷却水通路空間１９
に導入される。そして、冷却水通路空間１９に導入され
た冷却水は、ウォータジャケット外壁１５に形成された
各開口２２より、各シリンダライナ１１のウォータジャ
ケット１６に導かれ、各ウォータジャケット１６から各
ウォータジャケット１６の上部の導孔２４、連通孔２９
を通り、ノズルを介してシリンダヘッド１２のウォータ
ジャケット２６に供給される一方、冷却水通路空間１９
から直接冷却水通路空間１９の上部の導孔２３、連通孔
２８を通り、ノズルを介してシリンダヘッド１２のウォ
ータジャケット２６の排気ポート側に供給される。 【００２２】このため、冷却水によって各シリンダライ
ナ１１が冷却され、その冷却後シリンダヘッド１２のウ
ォータジャケット２６に導かれた冷却水によってシリン
ダヘッド１２各部の冷却が行われると共に、冷却水通路
空間１９から直接シリンダヘッド１２のウォータジャケ
ット２６の排気ポート側に導かれた冷却水によってシリ
ンダヘッド１２の排気ポート側が冷却され、またその冷
却水によってシリンダヘッド１２各部の冷却が行われる
のである。 【００２３】したがって、シリンダブロック１０、各シ
リンダライナ１１、シリンダヘッド１２各部、および熱
負荷の大きい排気ポート側のヘッド下壁２７の高い冷却
性能が確保される。 【００２４】なお、ブロック外壁１７の表面にオイルク
ーラ３１用のウォータギャラリ３０を形成することで、
構造がコンパクトになり、またエンジンの始動後、エン
ジンからの熱によって潤滑オイルが速やかに適正油温に
保たれる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling structure for an internal combustion engine. 2. Description of the Related Art A wet liner type cylinder block has a water jacket formed on the outer periphery of the cylinder liner. [0003] Cooling water is introduced into the water jacket through a cooling water passage provided on the outer wall of the water jacket along the direction of cylinder arrangement to cool the cylinder liner and to cool the cylinder liner. It is guided to the water jacket of the cylinder head through the guide hole provided in the upper part, and cools each part of the cylinder head. [0004] In some cases, cooling water from a water pump is separately supplied to a water jacket of a cylinder block and a water jacket of a cylinder head (see Japanese Patent Application Laid-Open Nos. 5-86970 and 6-37523). However, when cooling water introduced into the water jacket on the outer periphery of the cylinder liner is led to the cylinder head side through the through hole at the upper part of the water jacket, the heat load of the cylinder head is reduced. Good cooling performance of the large portion, that is, the lower wall of the cylinder head on the exhaust port side, cannot be obtained. Further, even when the cooling water is separately supplied to the cylinder block side and the cylinder head side, good cooling performance of the lower wall of the cylinder head on the exhaust port side can also be obtained depending on the supply position on the cylinder head side and the like. There is no problem. An object of the present invention is to solve such a problem. A first aspect of the present invention is a cooling structure for an internal combustion engine having a cylinder block forming a water jacket around a wet type cylinder liner. A cylinder enclosed by the upper wall and the block outer wall
Provided over the entire liner mounting part of the block,
Of which, the space on the engine exhaust path side is formed as a cooling water space ,
A water gallery for an oil cooler for cooling lubricating oil is formed on the surface of the block outer wall at the cooling water space side and a lower side of the liner mounting portion, and the water gallery passes through a water gallery for an oil cooler from a water pump. the cooling water cooling
The cooling water inlet leading to the water space block outside wall, the cooling water
And forming respective openings for guiding the cooling water space into the water jacket around the cylinder liner to the water jacket outer wall, cylinder cooling water on the top and the block on the wall of the upper portion of the water jacket around the cylinder liner of the cooling water space A guide hole leading to the water jacket of the head is formed. According to the first aspect of the present invention, good cooling performance of the cylinder block and the cylinder liner can be ensured, and at the same time, various portions of the cylinder head and the lower wall of the head on the exhaust port side where the heat load is large. High cooling performance can be secured. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a diesel engine, and FIG.
Is a cooling system diagram, 10 is a cylinder block of the engine, 11 is a cylinder liner of a wet type, 12 is a cylinder head, and 13 is a water pump. As shown in FIG. 1 to FIG.
Water jackets 16 are respectively formed around the cylinder liners 11 by the water jacket outer wall 15. The outer wall 15 of the water jacket between the adjacent cylinders is formed integrally. Block outer walls 17 and 18 are formed on both sides of the cylinder block 10 outside the water jacket outer wall 15 along the cylinder arrangement direction. The water jacket outer wall 15 and the block outer wall 1 on one side
The space surrounded by 7 and the block upper wall 14 returns to the cooling water passage space 19, and the space surrounded by the other water jacket outer wall 15, the block outer wall 18 and the block upper wall 14 returns oil from the cylinder head 12 side. It is formed in the oil return space 20. The water pump 13 is a cylinder block 1
The water gallery 30 is provided at the end of the block 0 and the cooling water is sent from the water pump 13 to the surface of the block outer wall 17. The water gallery 30 is provided with an oil cooler 31 for cooling the lubricating oil of the engine. . The cooling water passage space 19 is formed on the exhaust side (exhaust path side) of each cylinder. A cooling water inlet 21 for guiding cooling water passing through the water gallery 30 to the cooling water passage space 19 is provided on the block outer wall 17 of the cooling water passage space 19, and a water jacket outer wall 15 facing the cooling water passage space 19 is provided on the block outer wall 17. An opening 22 for guiding the cooling water entering the cooling water passage space 19 to each water jacket 16 is formed. At the top of the cooling water passage space 19 and at the top of each water jacket 16, a block upper wall 14 is provided.
Through the cooling water passage space 19 and the cooling water in each of the water jackets 16 respectively.
The guide holes 23 and 24 for feeding to the second water jacket 26 are formed. As shown in FIG. 5, a lower wall (head lower wall) 27 of a water jacket 26 of the cylinder head 12 has
Communication holes 28 and 29 communicating with the guide holes 23 and 24 are formed. Each of the communication holes 28 and 29 has a guide hole 2
Nozzles (not shown) for ejecting the cooling water sent from the cooling water passages 3 and 24 are provided.
The nozzle of the communication hole 28 through which the cooling water is sent is provided so as to jet the cooling water toward the exhaust valve ports 33 and 34 of the exhaust port 32. However, FIG. 5 shows the cross section height different between the left side and the right side of the figure. In the figure, reference numeral 35 denotes cooling water passing through the water jacket 26 of the cylinder head 12 depending on the temperature, via a radiator or directly through a bypass passage 36.
Shows a thermostat returning to the water pump 13 via a. With this configuration, the cooling water sent from the water pump 13 and passing through the water gallery 30 for the oil cooler 31 is formed on the exhaust path side of the engine, and the block outer wall 17, the block upper wall 14 and the water Cooling water passage space 19 surrounded by jacket outer wall 15
Will be introduced. Then, the cooling water introduced into the cooling water passage space 19 is guided to the water jackets 16 of the cylinder liners 11 from the respective openings 22 formed in the outer wall 15 of the water jacket, and from the respective water jackets 16 to the respective water jackets 16. Upper guide hole 24, communication hole 29
Through the nozzle, the water is supplied to the water jacket 26 of the cylinder head 12 through the nozzle, while the cooling water passage space 19
From the cooling water passage space 19, through the guide hole 23 and the communication hole 28 in the upper part of the cooling water passage space 19, and is supplied to the exhaust port side of the water jacket 26 of the cylinder head 12 via the nozzle. For this reason, each cylinder liner 11 is cooled by the cooling water. After the cooling, each part of the cylinder head 12 is cooled by the cooling water guided to the water jacket 26 of the cylinder head 12, and the cooling water passage space 19 The cooling water guided to the exhaust port side of the water jacket 26 of the cylinder head 12 directly cools the exhaust port side of the cylinder head 12, and the cooling water cools various parts of the cylinder head 12. Therefore, high cooling performance of the cylinder block 10, each cylinder liner 11, each part of the cylinder head 12, and the head lower wall 27 on the exhaust port side where the heat load is large is ensured. By forming a water gallery 30 for the oil cooler 31 on the surface of the block outer wall 17,
The structure becomes compact, and the lubricating oil is quickly maintained at an appropriate oil temperature by the heat from the engine after the engine is started.

【図面の簡単な説明】 【図１】エンジンの断面図である。 【図２】冷却系統図である。 【図３】シリンダブロックの断面図である。 【図４】シリンダブロックのシリンダ列方向の横断面図
である。 【図５】シリンダヘッドのシリンダ列方向の横断面図で
ある。 【符号の説明】 １０ シリンダブロック １１ シリンダライナ １２ シリンダヘッド １３ ウォータポンプ １４ ブロック上壁 １５ ウォータジャケット外壁 １６ ウォータジャケット １７，１８ ブロック外壁 １９ 冷却水通路空間 ２０ オイル戻し空間 ２１ 冷却水入口 ２２ 開口 ２３，２４ 導孔 ２６ ウォータジャケット ２７ ヘッド下壁 ２８，２９ 連通孔 ３０ ウォータギャラリ ３１ オイルクーラ ３２ 排気ポート ３３，３４ 排気弁口BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of an engine. FIG. 2 is a cooling system diagram. FIG. 3 is a sectional view of a cylinder block. FIG. 4 is a cross-sectional view of the cylinder block in a cylinder row direction. FIG. 5 is a cross-sectional view of a cylinder head in a cylinder row direction. [Description of Signs] 10 Cylinder block 11 Cylinder liner 12 Cylinder head 13 Water pump 14 Upper block wall 15 Water jacket outer wall 16 Water jacket 17, 18 Block outer wall 19 Cooling water passage space 20 Oil return space 21 Cooling water inlet 22 Opening 23, 24 Guide hole 26 Water jacket 27 Head lower wall 28, 29 Communication hole 30 Water gallery 31 Oil cooler 32 Exhaust port 33, 34 Exhaust valve port

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｆ０１Ｐ 3/02 Ｆ０１Ｐ 3/02 Ｓ Ｆ０２Ｆ 1/16 Ｆ０２Ｆ 1/16 Ｚ (58)調査した分野(Int.Cl.7，ＤＢ名) F02F 1/00 - 1/42 F01P 3/02 ──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. 7 identification code FI F01P 3/02 F01P 3/02 S F02F 1/16 F02F 1/16 Z (58) Fields surveyed (Int.Cl. 7 , DB Name) F02F 1/00-1/42 F01P 3/02

Claims (1)

(57)【特許請求の範囲】 【請求項１】 ウェット式のシリンダライナの周囲にウ
ォータジャケットを形成するシリンダブロックを有する
内燃機関の冷却構造において、 シリンダブロックのウォータジャケット外壁とブロック
上壁とブロック外壁とで囲われる空間をシリンダブロッ
クのライナ装着部の全体にわたって設けて、そのうち機
関排気経路側の空間を冷却水空間として形成し、前記冷却水空間側かつライナ装着部の下部側にて ブロッ
ク外壁表面に潤滑オイルを冷却するオイルクーラ用のウ
ォータギャラリを形成し、 ウォータポンプからオイルクーラ用のウォータギャラリ
を通過した冷却水を前記冷却水空間に導く冷却水入口を
ブロック外壁に、前記冷却水空間の冷却水をシリンダラ
イナの周囲のウォータジャケットに導く開口をウォータ
ジャケット外壁にそれぞれ形成すると共に、前記冷却水空間 の上部およびシリンダライナの周囲のウ
ォータジャケットの上部のブロック上壁に冷却水をシリ
ンダヘッドのウォータジャケットに導く導孔をそれぞれ
形成したことを特徴とする内燃機関の冷却構造。Claims: 1. A cooling structure for an internal combustion engine having a cylinder block forming a water jacket around a wet type cylinder liner, comprising: a water jacket outer wall, a block upper wall, and a block of the cylinder block. The space enclosed by the outer wall and the cylinder block
To the entire liner mounting area of the
A water gallery for an oil cooler that cools lubricating oil is formed on a surface of a block outer wall on a side of the cooling water space and a lower side of the liner mounting portion, by forming a space on the side of the exhaust passage on the side as a cooling water space. An opening for guiding the cooling water that has passed through the water gallery for the oil cooler from the water pump to the cooling water space is provided on the outer wall of the block, and an opening for guiding the cooling water of the cooling water space to the water jacket around the cylinder liner is provided. A water hole is formed in the outer wall of the water jacket, and a guide hole for guiding cooling water to the water jacket of the cylinder head is formed in an upper block wall of the water jacket above the cooling water space and around the cylinder liner. Cooling structure of an internal combustion engine.
JP08144398A 1998-03-27 1998-03-27 Cooling structure of internal combustion engine Expired - Fee Related JP3417832B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP08144398A JP3417832B2 (en) 1998-03-27 1998-03-27 Cooling structure of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP08144398A JP3417832B2 (en) 1998-03-27 1998-03-27 Cooling structure of internal combustion engine

Publications (2)

Publication Number Publication Date
JPH11280538A JPH11280538A (en) 1999-10-12
JP3417832B2 true JP3417832B2 (en) 2003-06-16

Family

ID=13746551

Family Applications (1)

Application Number Title Priority Date Filing Date
JP08144398A Expired - Fee Related JP3417832B2 (en) 1998-03-27 1998-03-27 Cooling structure of internal combustion engine

Country Status (1)

Country Link
JP (1) JP3417832B2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001123880A (en) * 1999-10-26 2001-05-08 Honda Motor Co Ltd Engine block
DE10227690A1 (en) * 2002-06-21 2004-01-08 Fev Motorentechnik Gmbh Cooled cylinder head for a piston internal combustion engine
JP4213012B2 (en) * 2003-10-10 2009-01-21 愛知機械工業株式会社 Cooling channel structure of internal combustion engine
CN104314698A (en) * 2014-10-20 2015-01-28 广西玉柴机器股份有限公司 Engine air cylinder body cooling water jacket structure
JP6781112B2 (en) 2017-06-30 2020-11-04 株式会社クボタ Vertical in-line multi-cylinder engine
JP6885892B2 (en) * 2018-03-19 2021-06-16 株式会社クボタ Vertical in-line multi-cylinder engine
JP6781219B2 (en) * 2018-09-12 2020-11-04 株式会社クボタ Vertical in-line multi-cylinder engine
JP6748684B2 (en) * 2018-09-12 2020-09-02 株式会社クボタ Water cooling engine

Also Published As

Publication number Publication date
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