JPH0158337B2 - - Google Patents
Info
- Publication number
- JPH0158337B2 JPH0158337B2 JP58130948A JP13094883A JPH0158337B2 JP H0158337 B2 JPH0158337 B2 JP H0158337B2 JP 58130948 A JP58130948 A JP 58130948A JP 13094883 A JP13094883 A JP 13094883A JP H0158337 B2 JPH0158337 B2 JP H0158337B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- intake
- exhaust
- passage
- communicates
- 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
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
- F02F1/26—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
- 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
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)
Description
【発明の詳細な説明】 本発明のエンジンの冷却水通路構造に関する。[Detailed description of the invention] The present invention relates to a cooling water passage structure for an engine.
第１図は従来のエンジンの冷却水システムを示
す。クランクケース１１はライナ１２支持してお
り、上部にシリンダヘツド１３を持つている。ラ
イナ１２の内面をピスストン１４が摺動する。シ
リンダライナ１２、シリンダヘツド１３、ピスト
ン１４で燃焼室１５を形成する。クランク軸で駆
動される冷却水ポンプ２１から吐出される冷却水
は、クランクケース１１とシリンダライナ１２で
形成される冷却水ジヤケツト２２の下部に入り、
シリンダライナ１２の外面を冷却して冷却水ジヤ
ケツト２２の上部にある連絡孔２３からシリンダ
ヘツド１３の冷却水溜２４に入る。 FIG. 1 shows a conventional engine cooling water system. The crankcase 11 supports a liner 12 and has a cylinder head 13 at the top. A piston 14 slides on the inner surface of the liner 12. A combustion chamber 15 is formed by a cylinder liner 12, a cylinder head 13, and a piston 14. The cooling water discharged from the cooling water pump 21 driven by the crankshaft enters the lower part of the cooling water jacket 22 formed by the crankcase 11 and the cylinder liner 12.
The outer surface of the cylinder liner 12 is cooled and the water enters the cooling water reservoir 24 of the cylinder head 13 through the communication hole 23 in the upper part of the cooling water jacket 22.
さらに冷却水シリンダヘツド１３の上部に設け
た水却水出口管２５から配管２６を通つてサーモ
スタツト２７に至る。サーモスタツト２７から冷
却水の一部はラジエター２８と管２９を通り、残
りはバイパス管３１を通つて直接冷却水ポンプ２
１の吸込口に至る。シリンダヘツド１３の−
断面を第２図に示す。シリンダヘツド１３の燃焼
室１５に接する面には吸気弁３１、排気弁３２お
よび燃料噴射弁３３が設けられ、吸気弁３１には
吸気通路３４が、排気弁３２には排気通路３５が
それぞれ接続されている。この吸気通路３４およ
び排気通路３５は共通の冷却水溜２４の中に設け
られている。 Further, a water cooling water outlet pipe 25 provided at the upper part of the cooling water cylinder head 13 passes through a pipe 26 to a thermostat 27. Part of the cooling water from the thermostat 27 passes through the radiator 28 and pipe 29, and the rest passes through the bypass pipe 31 and goes directly to the cooling water pump 2.
This leads to the 1st suction port. - of cylinder head 13
A cross section is shown in FIG. An intake valve 31, an exhaust valve 32, and a fuel injection valve 33 are provided on the surface of the cylinder head 13 that contacts the combustion chamber 15, and an intake passage 34 is connected to the intake valve 31, and an exhaust passage 35 is connected to the exhaust valve 32. ing. The intake passage 34 and the exhaust passage 35 are provided in a common cooling water reservoir 24.
次に前記従来例の作用について説明する。 Next, the operation of the conventional example will be explained.
冷却水ポンプ２１からの冷却水は、冷却水ジヤ
ケツト２２でライナ１２の外面を冷却して温度を
高め、次にシリンダヘツド１３内で燃焼室１５に
接する面を冷却して温度が高くなる。 The cooling water from the cooling water pump 21 cools the outer surface of the liner 12 in the cooling water jacket 22 to raise its temperature, and then cools the surface in contact with the combustion chamber 15 within the cylinder head 13, increasing its temperature.
ところで第２図に示すように吸気通路３４およ
び排気通路３５はシリンダヘツド１３内の共通の
冷却水溜２４に設置されている。ここで排気通路
３５には排気弁３２を経由して燃焼室１５から高
温の排ガスが流出する。このため排気通路３５の
壁面は高温になり冷却水溜２４を冷却水をさらに
加熱することになる。 By the way, as shown in FIG. 2, the intake passage 34 and the exhaust passage 35 are installed in a common cooling water reservoir 24 within the cylinder head 13. Here, high-temperature exhaust gas flows out from the combustion chamber 15 into the exhaust passage 35 via the exhaust valve 32. Therefore, the wall surface of the exhaust passage 35 becomes high in temperature, and the cooling water in the cooling water reservoir 24 is further heated.
この結果、冷却水溜２４内の冷却水温度がこの
分さらに上昇し、共通の冷却水溜２４内にある吸
気通路はこの高温の冷却水で加熱されることにな
る。 As a result, the temperature of the cooling water in the cooling water reservoir 24 further increases by this amount, and the intake passage in the common cooling water reservoir 24 is heated by this high temperature cooling water.
吸気通路３４内の吸気温度は通常冷却水ポンプ
２１が吐出する冷却水温度よりも低いため、吸気
通路３４内の吸気は加熱される。ところが従来の
エンジンの冷却水はライナ１２を冷却して得た熱
量、シリンダヘツド１３燃焼室１５に接する面を
冷却して得た熱量、さらにシリンダヘツド１３内
の排気通路３５の壁面が加熱した熱量の３つの熱
量を対応しただけの温度上昇が行われている。こ
の結果、吸気弁３１を通して燃焼室１５に吸入さ
れる吸気は加熱されてその密度を低下し、体積効
率が悪化して煙濃度の増大など燃焼悪化を生じる
原因となる。 Since the temperature of the intake air in the intake passage 34 is normally lower than the temperature of the cooling water discharged by the cooling water pump 21, the intake air in the intake passage 34 is heated. However, the cooling water of a conventional engine contains the amount of heat obtained by cooling the liner 12, the amount of heat obtained by cooling the surface of the cylinder head 13 in contact with the combustion chamber 15, and the amount of heat obtained by heating the wall surface of the exhaust passage 35 in the cylinder head 13. The temperature has increased by an amount corresponding to the three amounts of heat. As a result, the intake air sucked into the combustion chamber 15 through the intake valve 31 is heated and its density is reduced, which deteriorates the volumetric efficiency and causes deterioration in combustion such as an increase in smoke concentration.
本発明に係るエンジンの冷却通路構造は、シリ
ンダヘツド内の冷却水溜を排気通路をとりかこむ
冷却水溜と吸気通路をとりかこむ冷却水溜に分割
する隔壁を設け、さらにその隔壁にを穿設し、こ
の穴を通つてポンプ出口より分岐した冷却水が吸
気通路をとりかこむ冷却水溜から排気通路をとり
かこむ冷却水溜へ流れるようにし、吸入効率の向
上を達成しうるよう構成したものである。 The engine cooling passage structure according to the present invention is provided with a partition wall that divides the cooling water reservoir in the cylinder head into a cooling water reservoir surrounding the exhaust passage and a cooling water reservoir surrounding the intake passage, and further provided with a partition wall, which is perforated in the partition wall. The cooling water branched from the pump outlet through the hole flows from the cooling water reservoir surrounding the intake passage to the cooling water reservoir surrounding the exhaust passage, thereby improving suction efficiency.
以下第３図乃至第４図を参照して、本発明に係
るエンジンの冷却通路構造の実施例について説明
する。 Embodiments of the engine cooling passage structure according to the present invention will be described below with reference to FIGS. 3 and 4. FIG.
第３図に本発明のシリンダヘツド４０の水平断
図であり、第４図は第３図の−断面図であ
る。 FIG. 3 is a horizontal cross-sectional view of the cylinder head 40 of the present invention, and FIG. 4 is a cross-sectional view taken along the line shown in FIG.
本発明では第３図に示すようにシリンダヘツド
４０の冷却水溜４３に隔壁４１，４２を設けて、
吸気通路３４をとりかこむ吸気側冷却水溜４３
と、排気通路３５をとりかこむ排気側冷却水溜４
４に分割する。さらに隔壁４１，４２には冷却水
を流す穴４５，４６を設ける。又冷却水ジヤケツ
ト２２と排気側冷却水溜４４を連絡孔２３でつな
ぐとともに、ポンプ２１から吐出される冷却水が
冷却水ジヤケツト２２の下部に流入する前にその
一部を分岐して、管５１でシリンダヘツド４０の
吸気側冷却水溜４３の下部の冷却水入口５２に流
入させる。なお排気側冷却水溜４４から先の冷却
水の流れは、第１図の従来エンジンと同じであ
る。 In the present invention, partition walls 41 and 42 are provided in the cooling water reservoir 43 of the cylinder head 40 as shown in FIG.
Intake side cooling water reservoir 43 surrounding the intake passage 34
and an exhaust side cooling water reservoir 4 surrounding the exhaust passage 35.
Divide into 4. Further, the partition walls 41 and 42 are provided with holes 45 and 46 through which cooling water flows. In addition, the cooling water jacket 22 and the exhaust side cooling water reservoir 44 are connected through the communication hole 23, and before the cooling water discharged from the pump 21 flows into the lower part of the cooling water jacket 22, a part of the cooling water is branched and connected to the pipe 51. The cooling water flows into the cooling water inlet 52 at the lower part of the intake side cooling water reservoir 43 of the cylinder head 40. Note that the flow of cooling water beyond the exhaust side cooling water reservoir 44 is the same as in the conventional engine shown in FIG.
次に前記実施例の作用について説明する
冷却水ジヤケツト２２でライナ１２の外面を冷
却した冷却水は連絡孔２３から排気側冷却水溜４
４に流入する。さらに冷却水ポンプ２１から分岐
した約半分の冷却水は冷却水入口５２から直接吸
気側冷却水溜４３に流入し、穴４５，４６を通つ
て排気側冷却水溜４４に流入し、連絡孔２３から
の冷却水と合流した後、冷却水出口管２５から流
出する。なお排気側冷却水溜４４で加熱された冷
却水は吸気通路３４の壁面にふれることはない。
また吸気側冷却水溜４３の冷却水がシリンダヘツ
ド４０側の燃焼室１５に接する面の面積は全体の
約半分になる。 Next, the operation of the above embodiment will be explained. The cooling water that has cooled the outer surface of the liner 12 with the cooling water jacket 22 flows from the communication hole 23 to the exhaust side cooling water reservoir 4.
4. Furthermore, about half of the cooling water branched from the cooling water pump 21 flows directly into the intake side cooling water reservoir 43 from the cooling water inlet 52, flows into the exhaust side cooling water reservoir 44 through the holes 45 and 46, and flows from the communication hole 23. After merging with the cooling water, it flows out from the cooling water outlet pipe 25. Note that the cooling water heated in the exhaust side cooling water reservoir 44 does not come into contact with the wall surface of the intake passage 34.
Further, the area of the surface where the cooling water in the intake side cooling water reservoir 43 contacts the combustion chamber 15 on the cylinder head 40 side is approximately half of the total area.
前記のとおり吸気側冷却水溜４３の冷却水に加
えられる熱量は、シリンダヘツド４０の燃焼室１
５は半減した面を冷却して得た熱量だけとなるの
で、流量が半分になつてもシリンダライナ１２部
分より吸収する熱量がなくなる為、従来エンジン
にくらべて吸気側冷却水の温度上昇は少なくな
る。従つて吸気側冷却水溜４３の平均温度は大幅
に低下するため、吸気通路３４内に吸気通路の温
度上昇が小さくなり、体積効率が改善されエンジ
ン性能が向上する。 As mentioned above, the amount of heat added to the cooling water in the intake side cooling water reservoir 43 is
5, only the amount of heat obtained by cooling the halved surface is obtained, so even if the flow rate is halved, there is no amount of heat absorbed from the cylinder liner 12, so the temperature rise of the intake side cooling water is less compared to conventional engines. Become. Therefore, the average temperature of the intake side cooling water reservoir 43 is significantly reduced, so that the temperature rise in the intake passage within the intake passage 34 is reduced, the volumetric efficiency is improved, and the engine performance is improved.
第１〜２図は従来例で、第１図はエンジの冷却
システム図、第２図は第１図の−断面図、第
３〜４図は本発明の実施例に係るもので、第３図
は第２図応当図、第４図は第３図の−断面図
である。
２１……水ポンプ、２５……冷却水出口管、２
７……サーモスタツト、２８……ラジエータ、３
４……吸気通路、３５……排気通路、４１，４２
……隔壁、４３……吸気側冷却水室、４４……排
気側冷却水室、４５，４６……通孔、５１……副
冷却水管。
1 and 2 are conventional examples, FIG. 1 is a diagram of an engine cooling system, FIG. 2 is a cross-sectional view of FIG. The figure corresponds to FIG. 2, and FIG. 4 is a cross-sectional view taken from FIG. 3. 21...Water pump, 25...Cooling water outlet pipe, 2
7...Thermostat, 28...Radiator, 3
4...Intake passage, 35...Exhaust passage, 41, 42
...Partition wall, 43...Intake side cooling water chamber, 44...Exhaust side cooling water chamber, 45, 46...Through hole, 51...Subcooling water pipe.
Claims (1)
ツド内を吸気通路を囲む吸気側冷却水室と排気通
路を囲む排気側冷却水室とに区画する隔壁、同隔
壁に穿設され前記両冷却水室を連通する通孔、シ
リンダライナを囲む冷却水ジヤケツトと上記排気
側冷却水室とを連通する連絡孔、冷却水ポンプの
出口と上記冷却水ジヤケツトの入口とを連通する
主冷却水管、同主冷却水管から分岐して設けられ
上記吸気側冷却水室に連通する副冷却水管、及び
上記排気側冷却水室とサーモスタツトとを連通す
る出口管を備え、冷却水が上記副冷却水管を介し
て上記吸気側冷却水室に直接流入し、さらに上記
通孔から上記排気側冷却水室に流入して上記冷却
水ジヤケツトからの冷却水と合流した後上記出口
管から上記サーモスタツトに循環されるよう構成
したことを特徴とするエンジンの冷却通路構造。1 A partition wall provided in the cylinder head that divides the inside of the cylinder head into an intake side cooling water chamber surrounding the intake passage and an exhaust side cooling water chamber surrounding the exhaust passage; A communication hole that communicates with the cooling water jacket surrounding the cylinder liner and the exhaust side cooling water chamber, a main cooling water pipe that communicates the outlet of the cooling water pump with the inlet of the cooling water jacket, and a main cooling water pipe that communicates with the cooling water jacket that surrounds the cylinder liner. A sub-cooling water pipe that is branched from and communicates with the intake-side cooling water chamber, and an outlet pipe that communicates the exhaust-side cooling water chamber with the thermostat, the cooling water passing through the sub-cooling water pipe to the intake air. The cooling water is configured to flow directly into the side cooling water chamber, further flow into the exhaust side cooling water chamber through the through hole, join with the cooling water from the cooling water jacket, and then be circulated from the outlet pipe to the thermostat. An engine cooling passage structure characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13094883A JPS6026145A (en) | 1983-07-20 | 1983-07-20 | Cylinder head for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13094883A JPS6026145A (en) | 1983-07-20 | 1983-07-20 | Cylinder head for engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6026145A JPS6026145A (en) | 1985-02-09 |
| JPH0158337B2 true JPH0158337B2 (en) | 1989-12-11 |
Family
ID=15046396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13094883A Granted JPS6026145A (en) | 1983-07-20 | 1983-07-20 | Cylinder head for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6026145A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH088291Y2 (en) * | 1988-08-09 | 1996-03-06 | いすゞ自動車株式会社 | Cylinder head structure |
| JPH02256820A (en) * | 1989-03-29 | 1990-10-17 | H K S:Kk | Water-cooling apparatus of engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56138444A (en) * | 1980-03-29 | 1981-10-29 | Yamaha Motor Co Ltd | Cylinder head for water-cooled internal combustion engine |
-
1983
- 1983-07-20 JP JP13094883A patent/JPS6026145A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6026145A (en) | 1985-02-09 |
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