JPH04103821A - Cooling device of straight type multiple cylinder air-cooled engine - Google Patents
Cooling device of straight type multiple cylinder air-cooled engineInfo
- Publication number
- JPH04103821A JPH04103821A JP22069190A JP22069190A JPH04103821A JP H04103821 A JPH04103821 A JP H04103821A JP 22069190 A JP22069190 A JP 22069190A JP 22069190 A JP22069190 A JP 22069190A JP H04103821 A JPH04103821 A JP H04103821A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- cylinder
- liquid
- block
- air
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 claims abstract description 13
- 239000000110 cooling liquid Substances 0.000 claims abstract description 10
- 239000002826 coolant Substances 0.000 claims description 9
- 239000010687 lubricating oil Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000005068 cooling lubricant Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、直列多気筒空冷エンジンでの冷却装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cooling device for an in-line multi-cylinder air-cooled engine.
(従来技術)
一般に、多気筒空冷エンジンでは、シリンダブロックに
複数のシリンダを配設し、このシリンダブロックの上面
に1ブロツクに形成したヘッドブロックを固定し、シリ
ンダブロックの一側から突出させた回転軸に冷却ファン
を配置し、この冷却ファンを取り囲む状態でファンケー
スを配置し、冷却ファンで起風した冷却風をファンケー
スおよびこのファンケースに連続する状態に形成した導
風力バーで案内して、シリンタブロックおよびヘッドブ
ロックと冷却風との間て熱交換して、シリンダブロック
およびヘッドブロックを冷却するように構成していた。(Prior art) Generally, in a multi-cylinder air-cooled engine, a plurality of cylinders are arranged in a cylinder block, and a head block formed in one block is fixed to the upper surface of the cylinder block, and a rotating head block that protrudes from one side of the cylinder block is fixed. A cooling fan is arranged on the shaft, a fan case is arranged to surround the cooling fan, and the cooling air generated by the cooling fan is guided by the fan case and a guide force bar formed in a continuous manner with the fan case. , the cylinder block and head block are cooled by exchanging heat between the cylinder block and head block and the cooling air.
(解決しようとする課題)
ところが、ヘッドブロックを一連に形成した従来の多気
筒空冷エンジンの場合、ヘットブロックの熱負荷が上が
るうえ、冷却風をヘッドブロック全体に平均して接触さ
せることが困難であることから熱分布にムラが生じ、運
転時にヘッドが反ったり曲がったりして、ヘットブロッ
クとシリンダブロックとの間でのガスンールが困難にな
るという問題があった。(Problem to be solved) However, in the case of conventional multi-cylinder air-cooled engines that have a series of head blocks, the heat load on the head block increases and it is difficult to bring cooling air into contact with the entire head block evenly. This causes uneven heat distribution, causing the head to warp or bend during operation, making it difficult to connect the gas between the head block and the cylinder block.
本発明は、このような点に着目してなされたもので、気
筒間での熱の問題を解消して、ヘッド同士間での熱歪み
が生じない多気筒空冷エンジンを提供することを目的と
する。The present invention has been made with attention to these points, and an object of the present invention is to provide a multi-cylinder air-cooled engine that eliminates the problem of heat between cylinders and does not cause thermal distortion between heads. do.
(課題を解決するための手段)
上述の目的を達成するために本第1発明は、シリンダブ
ロックの上面に各シリンダに対応させて独立のへ、ドブ
ロックをそれぞれ固定し、各へノドブロック同士間を冷
却風通路に形成し、ファンケースから導風板て案内した
冷却風をヘンドブロック間に流すように構成したことを
特徴とし、また、本第2発明では、ヘットブロックを各
シリンダ毎に独立させて配置し、この各へノドプロ、り
間に冷却風通路を形成してなる多気筒空冷エンジンにお
いて各ヘットブロック内に副燃焼室を形成し、この副燃
焼室の外周に液冷ジャケットを形成し、各液冷ジャケッ
トに連通ずる冷却液通路を各ヘッドブロックにおける吸
・排気弁の弁間部分に形成し、この冷却液通路を通って
液冷ジャケットに冷却液を供給するように構成したこと
を特徴としている。(Means for Solving the Problem) In order to achieve the above-mentioned object, the first invention fixes door blocks to the upper surface of the cylinder block in independent slots corresponding to each cylinder, and connects the slot blocks to each cylinder. A cooling air passage is formed between the head blocks, and the cooling air guided from the fan case by the air guide plate is made to flow between the head blocks. In a multi-cylinder air-cooled engine in which a cooling air passage is formed between each head block, an auxiliary combustion chamber is formed in each head block, and a liquid cooling jacket is installed around the outer periphery of this auxiliary combustion chamber. A cooling liquid passage communicating with each liquid cooling jacket is formed in a portion between the intake and exhaust valves in each head block, and the cooling liquid is supplied to the liquid cooling jacket through this cooling liquid passage. It is characterized by what it did.
(作 用)
本発明では、シリンダブロックの上面に各シリンダに対
応させて独立のヘッドブロックをそれぞれ固定し、各ヘ
ッドブロック同士間を冷却風通路に形成し、ファンケー
スから導風板で案内した冷却風をヘッドプロνり間に流
すように構成していることから、隣合うヘッドブロック
同士での熱影響が各ヘッドブロックに生じることがなく
、各ヘッドブロックの冷却を確実におこなえる。(Function) In the present invention, independent head blocks are fixed to the upper surface of the cylinder block in correspondence with each cylinder, and cooling air passages are formed between the head blocks, which are guided from the fan case by an air guide plate. Since the cooling air is configured to flow between the head blocks, each head block is prevented from being affected by heat between adjacent head blocks, and each head block can be reliably cooled.
また、ヘッドブロックの内部に形成した副燃焼室を液冷
ジャケットで取り囲み、この液冷ジャケットに連通ずる
冷却液通路を各ヘッドブロックにおける吸・排気弁の弁
間部分に形成した場合には、弁間部分での熱負荷を下げ
ることができることになる。In addition, if the auxiliary combustion chamber formed inside the head block is surrounded by a liquid cooling jacket, and the cooling liquid passage communicating with the liquid cooling jacket is formed between the valves of the intake and exhaust valves in each head block, the valve This means that the heat load in the middle part can be reduced.
(実施例)
図面は本発明の実施例を示し、第1図は部分油冷併用空
冷2気筒エンジンの縦断側面図、第2図はヘッドブロッ
ク部分の横断平面図である。(Embodiment) The drawings show an embodiment of the present invention, in which FIG. 1 is a vertical side view of a partially oil-cooled and air-cooled two-cylinder engine, and FIG. 2 is a cross-sectional plan view of a head block portion.
このエンジン(1)は、シリンダブロック(2)内に2
本のシリンダ(3)を直列に形成し、/リンダブロック
(2)の上面にヘッドブロック(4)を固定し、シリン
ダブロック(2)と一体に形成したクランクケース(5
)の一側面から突出しているクランク軸(6)の一端部
にフライホイール兼用の冷却ファン(7〉を固定′シ、
この冷却ファン(7)を取り囲む状態でファンケース(
8)を配置し、冷却ファン(7)で起風した冷却風をシ
リンダブロック(2)及びヘッドブロック(4)の周面
に通風させて冷却するように構成しである。This engine (1) has two cylinders in the cylinder block (2).
The main cylinders (3) are formed in series, the head block (4) is fixed to the upper surface of the cylinder block (2), and the crankcase (5) is formed integrally with the cylinder block (2).
A cooling fan (7) which also serves as a flywheel is fixed to one end of the crankshaft (6) protruding from one side of ).
The fan case (
8), and the cooling air generated by the cooling fan (7) is made to circulate around the circumferential surfaces of the cylinder block (2) and head block (4) for cooling.
ベツドブロック(4)はシリンダ(3)毎に独立してい
る単筒ヘットで形成してあり、隣合うヘットブロック(
4)(4)同士間に冷却風通路(9)が形成しである。The bed block (4) is formed by an independent single cylinder head for each cylinder (3), and the adjacent head block (
4) A cooling air passage (9) is formed between the (4).
また、ヘットブロック(4)の内部には、第2図に示す
ように、吸気ボート(lO)、排気ポー) (11)と
ともに、副燃焼室(12)が形成してあり、この副燃焼
室(12)の外周を取り囲む状態で液冷ジャケット(1
3)が形成しである。そして、液冷ジャケラ) (13
)に冷却液を供給する冷却液通路(14)は吸気ボー)
(10)及び排気ポート(11)の燃焼室への開口部
分、即ち、吸気弁(15)と排気弁(16)との弁間部
分を通るように形成しである。Furthermore, as shown in Fig. 2, a sub-combustion chamber (12) is formed inside the head block (4) together with an intake boat (lO) and an exhaust port (11). (12) surrounding the outer periphery of the liquid cooling jacket (12).
3) is formed. And liquid cooling jacket) (13
) The coolant passage (14) that supplies coolant to the intake bow)
(10) and the exhaust port (11) are formed to pass through the opening portions to the combustion chamber, that is, the portion between the intake valve (15) and the exhaust valve (16).
この冷却液通路りI3)にはエンジン潤滑油の一部が供
給され、この冷却用潤滑油は液冷ジャケット(13)で
副燃焼室(12)を冷却したのち、副燃焼室(12)の
天井部分から導出した冷却液導出管(図外)でファンケ
ース(8)の上部に配置したオイルクーラ(17)で冷
却風と熱交換させ、この熱交換後の冷却用潤滑油を冷却
液戻し管(図外)でヘッドブロック(4)内に戻し、ヘ
ッドブロック(4)にブツシュロフト室(18)と併設
して形成した潤滑油戻し路からクランク室に戻すように
構成しである。A part of the engine lubricating oil is supplied to this coolant passage I3), and this cooling lubricating oil cools the sub-combustion chamber (12) with the liquid cooling jacket (13), and then cools the sub-combustion chamber (12). The oil cooler (17) placed at the top of the fan case (8) exchanges heat with the cooling air using a coolant outlet pipe (not shown) led out from the ceiling, and the cooling lubricant after this heat exchange is returned to the coolant. The lubricating oil is returned to the head block (4) through a pipe (not shown) and returned to the crank chamber through a lubricating oil return path formed in the head block (4) along with the Bushloft chamber (18).
また、シリンタブロック(2)及びヘッドブロック(4
)における吸気マニホールド(19)の配設側の側面に
は、導風板(20)がファンケース(8)に連続する状
態で配置してあり、冷却ファン(7)で起風した冷却風
を吸気マニホールド(19)配設側から排気マニホール
ド配設側に向かって流通させるように構成しである。Also, cylinder block (2) and head block (4)
), on the side where the intake manifold (19) is installed, an air guide plate (20) is disposed so as to be continuous with the fan case (8), and the air guide plate (20) is arranged to be continuous with the fan case (8), and directs the cooling air generated by the cooling fan (7). It is configured to flow from the intake manifold (19) side to the exhaust manifold side.
なお、上記実施例では、ヘッドブロックく4)内に副燃
焼室(12)を形成し、この副燃焼室(12)を液冷ジ
ャケラ) (13)で取り囲み、この液冷ジャケット(
13)に潤滑油の一部を供給して、潤滑油で冷却する部
分油冷エンジンで説明したが、冷却液としては潤滑油以
外の冷却液を使用するができ、また、液冷を行わない空
冷エンジンであってもよい。In the above embodiment, a sub-combustion chamber (12) is formed within the head block (4), and this sub-combustion chamber (12) is surrounded by a liquid cooling jacket (13).
13) A partially oil-cooled engine that supplies part of the lubricating oil and cools it with the lubricating oil was explained, but it is also possible to use a coolant other than lubricating oil as the coolant, and it is also possible to use a partially oil-cooled engine that does not use liquid cooling. It may also be an air-cooled engine.
(効 果)
本発明では、シリンダブロックの上面に各シリンダに対
応させて独立のへットブロソクをそれぞれ固定し、各ヘ
ッドブロック同士間を冷却風通路に形成し、ファンケー
スから導風板で案内した冷却風をへ、ドブロック間に流
すように構成していることから、隣合うヘッドブロック
同士での熱影響が各ヘッドプロッタに生じることがなく
、各ヘッドブロックの冷却を確実におこなうことができ
る。これにより、各ヘッドブロックでの熱歪みの発生を
防止することかでき、ヘッドブロックの反りや曲がりを
減少させてガスのシール性を長期にわたって良好に維持
することができる。(Effects) In the present invention, independent head blowers are fixed to the upper surface of the cylinder block in correspondence with each cylinder, and a cooling air passage is formed between each head block, which is guided from the fan case by an air guide plate. Since the structure is configured so that cooling air flows between the head blocks, each head plotter is not affected by heat from adjacent head blocks, and each head block can be reliably cooled. . As a result, it is possible to prevent thermal distortion from occurring in each head block, reduce warping and bending of the head blocks, and maintain good gas sealing performance over a long period of time.
また、ヘッドブロックの内部に形成した副燃焼室を液冷
ジャケットで取り囲み、この液冷ジャケットに連通ずる
冷却液通路を各ヘッドブロックにおける吸・排気弁の弁
間部分に形成した場合には、弁間部分での熱負荷を下げ
ることができ、より冷却効果を高めることができる。In addition, if the auxiliary combustion chamber formed inside the head block is surrounded by a liquid cooling jacket, and the cooling liquid passage communicating with the liquid cooling jacket is formed between the valves of the intake and exhaust valves in each head block, the valve It is possible to reduce the heat load in the middle part and further enhance the cooling effect.
図面は本発明の実施例を示し、第1図は部分油冷併用空
冷2気筒エンジンの縦断側面図、第2図はへノドブロッ
ク部分の横断平面図である。
2・・・シリンタブロック、3・・・シリンダ、4・・
・ヘッドブロック、6・・・回転軸、7・・・冷却ファ
ン、8・・・ファンケース、9・・・冷却風通路、12
・・・副燃焼室、13・・・液冷ジャケット、14・・
・冷却液通路、15・・・吸気弁、16・・・排気弁、
20・・・導風板。
特許出願人 株式会社り ボ タ
第2図
第
図The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal side view of a partially oil-cooled and air-cooled two-cylinder engine, and FIG. 2 is a cross-sectional plan view of a hennoblock portion. 2... Cylinder block, 3... Cylinder, 4...
・Head block, 6...Rotating shaft, 7...Cooling fan, 8...Fan case, 9...Cooling air passage, 12
...Sub-combustion chamber, 13...Liquid cooling jacket, 14...
・Cooling liquid passage, 15... Intake valve, 16... Exhaust valve,
20...Air guide plate. Patent applicant Ribo Co., Ltd. Figure 2
Claims (1)
を直列に配置し、シリンダブロック(2)の一側から突
出させた回転軸(6)に冷却ファン(7)を配置し、こ
の冷却ファン(7)を取り囲む状態でファンケース(8
)を配置した直列多気筒空冷エンジンにおいて、 シリンダブロック(2)の上面に各シリンダ(3)に対
応させて独立のヘッドブロック(4)をそれぞれ固定し
、各ヘッドブロック(4)同士間を冷却風通路(9)に
形成し、ファンケース(8)から導風板(20)で案内
した冷却風をヘッドブロック(4)間に流すように構成
したことを特徴とする直列多気筒空冷エンジンの冷却装
置。 2、各ヘッドブロック(4)内に副燃焼室(12)を形
成し、この副燃焼室(12)の外周に液冷ジャケット(
13)を形成し、各液冷ジャケット(13)に連通する
冷却液通路(14)を各ヘッドブロック(4)における
吸・排気弁(15)・(16)の弁間部分に形成し、こ
の冷却液通路(14)を通って液冷ジャケット(13)
に冷却液を供給するように構成した請求項1に記載の直
列多気筒空冷エンジンの冷却装置。[Claims] 1. A plurality of cylinders (3) in the cylinder block (2)
are arranged in series, a cooling fan (7) is arranged on the rotating shaft (6) protruding from one side of the cylinder block (2), and a fan case (8) is arranged to surround the cooling fan (7).
), an independent head block (4) is fixed to the top surface of the cylinder block (2) in correspondence with each cylinder (3), and the air between each head block (4) is cooled. An in-line multi-cylinder air-cooled engine characterized in that the cooling air is formed in the air passage (9) and guided by the air guide plate (20) from the fan case (8) so as to flow between the head blocks (4). Cooling system. 2. A sub-combustion chamber (12) is formed in each head block (4), and a liquid cooling jacket (
13), and a coolant passage (14) communicating with each liquid cooling jacket (13) is formed between the intake/exhaust valves (15) and (16) in each head block (4). Liquid cooling jacket (13) through coolant passage (14)
2. The cooling device for an in-line multi-cylinder air-cooled engine according to claim 1, wherein the cooling device is configured to supply a cooling liquid to the in-line multi-cylinder air-cooled engine.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22069190A JPH04103821A (en) | 1990-08-21 | 1990-08-21 | Cooling device of straight type multiple cylinder air-cooled engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22069190A JPH04103821A (en) | 1990-08-21 | 1990-08-21 | Cooling device of straight type multiple cylinder air-cooled engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04103821A true JPH04103821A (en) | 1992-04-06 |
Family
ID=16754976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22069190A Pending JPH04103821A (en) | 1990-08-21 | 1990-08-21 | Cooling device of straight type multiple cylinder air-cooled engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04103821A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05296039A (en) * | 1992-04-20 | 1993-11-09 | Kawasaki Heavy Ind Ltd | Four-cycle engine |
US6545180B1 (en) | 1998-09-24 | 2003-04-08 | Daicel Chemical Industries, Ltd. | Process for the preparation of sorbic acid |
US6557264B1 (en) | 1999-08-09 | 2003-05-06 | Asia Industrial Co., Ltd. | Invertably standable cooking utensil |
DE102007045542A1 (en) * | 2007-09-24 | 2009-04-02 | Deutz Ag | Internal-combustion engine i.e. self-igniting internal-combustion engine, for driving e.g. work machine, has cylinder housing air-conditioned outside of portions, and exhaust gas recirculation cooler integrated into cylinder housing |
WO2014095043A1 (en) * | 2012-12-21 | 2014-06-26 | Caterpillar Motoren Gmbh & Co. Kg | Cylinder head and engine block configuration |
JP2018009522A (en) * | 2016-07-14 | 2018-01-18 | ヤンマー株式会社 | Multi-cylinder engine |
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JPS4816253B1 (en) * | 1969-10-27 | 1973-05-21 | ||
JPS5311248A (en) * | 1976-07-19 | 1978-02-01 | Kawasaki Heavy Ind Ltd | Engine cover |
JPH02108812A (en) * | 1988-10-14 | 1990-04-20 | Kubota Ltd | Cylinder head cooler for using air cooling with liquid cooling |
JPH111476A (en) * | 1997-04-25 | 1999-01-06 | Ontogen Corp | Multiple drug resistance modulator |
-
1990
- 1990-08-21 JP JP22069190A patent/JPH04103821A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4816253B1 (en) * | 1969-10-27 | 1973-05-21 | ||
JPS5311248A (en) * | 1976-07-19 | 1978-02-01 | Kawasaki Heavy Ind Ltd | Engine cover |
JPH02108812A (en) * | 1988-10-14 | 1990-04-20 | Kubota Ltd | Cylinder head cooler for using air cooling with liquid cooling |
JPH111476A (en) * | 1997-04-25 | 1999-01-06 | Ontogen Corp | Multiple drug resistance modulator |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05296039A (en) * | 1992-04-20 | 1993-11-09 | Kawasaki Heavy Ind Ltd | Four-cycle engine |
US6545180B1 (en) | 1998-09-24 | 2003-04-08 | Daicel Chemical Industries, Ltd. | Process for the preparation of sorbic acid |
US6557264B1 (en) | 1999-08-09 | 2003-05-06 | Asia Industrial Co., Ltd. | Invertably standable cooking utensil |
DE102007045542A1 (en) * | 2007-09-24 | 2009-04-02 | Deutz Ag | Internal-combustion engine i.e. self-igniting internal-combustion engine, for driving e.g. work machine, has cylinder housing air-conditioned outside of portions, and exhaust gas recirculation cooler integrated into cylinder housing |
WO2014095043A1 (en) * | 2012-12-21 | 2014-06-26 | Caterpillar Motoren Gmbh & Co. Kg | Cylinder head and engine block configuration |
CN104870793A (en) * | 2012-12-21 | 2015-08-26 | 卡特彼勒发动机有限及两合公司 | Cylinder head and engine block configuration |
CN104870793B (en) * | 2012-12-21 | 2017-12-08 | 卡特彼勒发动机有限及两合公司 | Cylinder head and cluster engine configuration |
US10082100B2 (en) | 2012-12-21 | 2018-09-25 | Caterpillar Motoren Gmbh & Co. Kg | Cylinder head and engine block configuration |
JP2018009522A (en) * | 2016-07-14 | 2018-01-18 | ヤンマー株式会社 | Multi-cylinder engine |
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