JP2000161130A - Head overheat part cooling structure for monoblock engine - Google Patents
Head overheat part cooling structure for monoblock engineInfo
- Publication number
- JP2000161130A JP2000161130A JP10339101A JP33910198A JP2000161130A JP 2000161130 A JP2000161130 A JP 2000161130A JP 10339101 A JP10339101 A JP 10339101A JP 33910198 A JP33910198 A JP 33910198A JP 2000161130 A JP2000161130 A JP 2000161130A
- Authority
- JP
- Japan
- Prior art keywords
- water chamber
- cooling water
- head
- cylinder
- injection valve
- 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 description 23
- 239000000498 cooling water Substances 0.000 claims abstract description 97
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000002347 injection Methods 0.000 claims abstract description 37
- 239000007924 injection Substances 0.000 claims abstract description 37
- 238000005192 partition Methods 0.000 claims description 39
- 239000008400 supply water Substances 0.000 claims description 33
- 238000004891 communication Methods 0.000 claims description 30
- 239000000446 fuel Substances 0.000 claims description 23
- 238000013021 overheating Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000243 solution Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 12
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
Landscapes
- 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、シリンダヘッド部
とシリンダブロック部を一体に形成し、各気筒が燃料噴
射弁と、連通したヘッド側冷却水室、ライナ側冷却水室
とを有する形式のモノブロックエンジンのヘッド過熱部
冷却構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system in which a cylinder head portion and a cylinder block portion are integrally formed, and each cylinder has a fuel injection valve, a head-side cooling water chamber and a liner-side cooling water chamber communicating with each other. The present invention relates to a head overheating portion cooling structure of a monoblock engine.
【０００２】[0002]
【従来の技術】従来、シリンダヘッド部とシリンダブロ
ック部を一体に形成し、各気筒が燃料噴射弁と、連通し
たヘッド側冷却水室、ライナ側冷却水室とを有する形式
のモノブロックエンジンは知られている。そのエンジン
では、冷却水ポンプの吐出口はライナ側冷却水室の下部
に連通し、燃焼室を囲むシリンダブロック部を冷却した
後の冷却水がヘッド側冷却水室へ供給され、シリンダヘ
ッド部を冷却した後に排気マニホールド内の冷却水室等
とラジエータを経て再び冷却水ポンプの吸込み口に戻さ
れるのが一般的である。ところがその場合はヘッド側冷
却水室へ入る冷却水の温度がかなり上昇しており、しか
も噴射弁ガイド部と排気弁ガイド部からなる過熱部に積
極的に供給されない構造である為、過熱部に亀裂や変形
が生じたり、燃料噴射弁の性能が低下する等の不具合が
避けられなかった。2. Description of the Related Art Conventionally, a monoblock engine of a type in which a cylinder head portion and a cylinder block portion are integrally formed and each cylinder has a fuel injection valve, a head-side cooling water chamber and a liner-side cooling water chamber communicating with each other is known. Are known. In that engine, the discharge port of the cooling water pump communicates with the lower part of the liner-side cooling water chamber, and cooling water after cooling the cylinder block surrounding the combustion chamber is supplied to the head-side cooling water chamber, and the cylinder head is cooled. After cooling, the cooling water is generally returned to the suction port of the cooling water pump through a cooling water chamber and the like in the exhaust manifold and a radiator. However, in this case, the temperature of the cooling water entering the cooling water chamber on the head side has risen considerably, and the structure is not actively supplied to the superheated portion consisting of the injection valve guide and the exhaust valve guide. Failures such as cracking and deformation and deterioration of the performance of the fuel injection valve were inevitable.
【０００３】[0003]
【発明が解決しようとする課題】モノブロックエンジン
のヘッド過熱部を有効に冷却し得る構造を提供する。SUMMARY OF THE INVENTION An object of the present invention is to provide a structure capable of effectively cooling a head heating portion of a monobloc engine.
【０００４】[0004]
【課題を解決するための手段】請求項１の発明は、シリ
ンダヘッド部とシリンダブロック部を一体に形成し、各
気筒が燃料噴射弁と、連通したヘッド側冷却水室、ライ
ナ側冷却水室とを有する形式のモノブロックエンジンに
おいて、ヘッド側冷却水室を一方の供給水室と他方の排
出水室とに隔絶し、シリンダヘッド部の肉厚内の燃料噴
射弁を囲む噴射弁ガイド部と排気弁を囲む排気弁ガイド
部との間の連通水路の一端を供給水室へ、又他端を排出
水室へ接続して、上記噴射弁ガイド部と排気弁ガイド部
からなる過熱部を有効に冷却することを特徴とするモノ
ブロックエンジンのヘッド過熱部冷却構造である。According to a first aspect of the present invention, a cylinder head portion and a cylinder block portion are integrally formed, and each cylinder communicates with a fuel injection valve in a head side cooling water chamber and a liner side cooling water chamber. In the monoblock engine of the type having an injection valve guide section surrounding the fuel injection valve within the thickness of the cylinder head section, the head side cooling water chamber is separated into one supply water chamber and the other discharge water chamber. One end of the communication water passage between the exhaust valve guide and the exhaust valve guide surrounding the exhaust valve is connected to the supply water chamber, and the other end is connected to the discharge water chamber, so that the superheated section consisting of the injection valve guide and the exhaust valve guide is effective. This is a head overheating portion cooling structure for a monobloc engine, characterized in that it is cooled down.
【０００５】請求項２の発明は、シリンダヘッド部とシ
リンダブロック部を一体に形成し、各気筒が燃料噴射弁
と、連通したヘッド側冷却水室、ライナ側冷却水室とを
有する形式のモノブロックエンジンにおいて、ヘッド側
冷却水室を一方の供給水室と他方の排出水室とで構成
し、燃料噴射弁と排気弁近傍の過熱部に冷却水を導くよ
うにすると共に、ヘッド側冷却水室とライナ側冷却水室
とを上下に隔絶する供給水室側の第１隔壁と排出水室側
の第２隔壁とを設け、第１隔壁に連通口を開設し、第１
隔壁の下部と第２隔壁の上部をつなぐライナ側連通水路
を設けたことを特徴とするモノブロックエンジンのヘッ
ド過熱部冷却構造である。According to a second aspect of the invention, a cylinder head and a cylinder block are integrally formed, and each cylinder has a fuel injection valve, and a head-side cooling water chamber and a liner-side cooling water chamber which communicate with each other. In the block engine, the head-side cooling water chamber is composed of one supply water chamber and the other discharge water chamber so that the cooling water is guided to a superheated portion near the fuel injection valve and the exhaust valve, and the head-side cooling water is formed. A first partition wall on the side of the supply water chamber and a second partition wall on the side of the discharge water chamber that vertically separate the chamber and the cooling water chamber on the liner side, and a communication port is opened in the first partition,
A head overheating portion cooling structure for a monoblock engine, wherein a liner-side communication water passage connecting a lower portion of the partition and an upper portion of the second partition is provided.
【０００６】請求項３の発明は、シリンダヘッド部とシ
リンダブロック部を一体に形成し、各気筒が燃料噴射弁
と、連通したヘッド側冷却水室、ライナ側冷却水室とを
有する形式のモノブロックエンジンにおいて、ヘッド側
冷却水室を一方の供給水室と他方の排出水室とで構成
し、燃料噴射弁と排気弁近傍の過熱部に冷却水を導くよ
うにすると共に、ヘッド側冷却水室とライナ側冷却水室
とを上下に隔絶する供給水室側の第１隔壁と排出水室側
の第２隔壁とを設け、第１隔壁に連通口を開設し、第１
隔壁の下部と第２隔壁の上部をつなぐライナ側連通水路
を設け、供給水室側のライナ側冷却水室から過熱部に向
かう導水管を付設したことを特徴とするモノブロックエ
ンジンのヘッド過熱部冷却構造である。According to a third aspect of the present invention, a cylinder head portion and a cylinder block portion are integrally formed, and each cylinder has a fuel injection valve, and a head-side cooling water chamber and a liner-side cooling water chamber communicating with each other. In the block engine, the head-side cooling water chamber is composed of one supply water chamber and the other discharge water chamber so that the cooling water is guided to a superheated portion near the fuel injection valve and the exhaust valve, and the head-side cooling water is formed. A first partition wall on the side of the supply water chamber and a second partition wall on the side of the discharge water chamber that vertically separate the chamber and the cooling water chamber on the liner side, and a communication port is opened in the first partition,
A head overheating section of a monoblock engine, comprising: a liner-side communication water passage connecting a lower part of the partition wall and an upper part of the second partition wall; It is a cooling structure.
【０００７】請求項４の発明は、シリンダヘッド部とシ
リンダブロック部を一体に形成し、各気筒が燃料噴射弁
と、連通したヘッド側冷却水室、ライナ側冷却水室とを
有する形式のモノブロックエンジンにおいて、ヘッド側
冷却水室を一方の供給水室と他方の排出水室とで構成
し、燃料噴射弁と排気弁近傍の過熱部に冷却水を導くよ
うにすると共に、シリンダヘッド部の上側に別体ブロッ
クを取付け、この別体ブロックに形成した冷却水供給水
室を過熱部へ向かうヘッド側導水路に接続して過熱部を
有効に冷却するようにしたことを特徴とするモノブロッ
クエンジンのヘッド過熱部冷却構造である。According to a fourth aspect of the present invention, a cylinder head portion and a cylinder block portion are integrally formed, and each cylinder has a fuel injection valve, a head-side cooling water chamber and a liner-side cooling water chamber communicating with each other. In the block engine, the head side cooling water chamber is composed of one supply water chamber and the other discharge water chamber, and the cooling water is guided to a superheated portion near the fuel injection valve and the exhaust valve, and the cylinder head portion is formed. A monoblock characterized in that a separate block is mounted on the upper side, and a cooling water supply water chamber formed in the separate block is connected to a head-side water channel toward the superheating section to effectively cool the superheating section. This is a cooling structure of the engine's head heating section.
【０００８】請求項５の発明は、シリンダヘッド部とシ
リンダブロック部を一体に形成し、各気筒が燃料噴射弁
と、連通したヘッド側冷却水室、ライナ側冷却水室とを
有する形式のモノブロックエンジンにおいて、ヘッド側
冷却水室を一方の供給水室と他方の排出水室とで構成
し、シリンダヘッド部に吸気マニホールドを取付け、こ
の吸気マニホールドに形成した冷却水供給水室を過熱部
へ向かうヘッド側導水路に接続して過熱部を有効に冷却
するようにしたことを特徴とするモノブロックエンジン
のヘッド過熱部冷却構造である。According to a fifth aspect of the present invention, a cylinder head portion and a cylinder block portion are integrally formed, and each cylinder has a fuel injection valve, a head-side cooling water chamber, and a liner-side cooling water chamber which communicate with each other. In the block engine, the head side cooling water chamber is composed of one supply water chamber and the other discharge water chamber, an intake manifold is attached to the cylinder head, and the cooling water supply water chamber formed in this intake manifold is connected to the superheater. A head superheated part cooling structure of a monoblock engine, characterized in that the superheated part is effectively cooled by being connected to a head-side headrace channel toward the head.
【０００９】[0009]
【発明の実施の形態】図１は、請求項１の発明によるモ
ノブロックエンジン１の第１気筒（Ｎｏ．１Ｃｙｌ．）
の要部縦断正面図で、エンジンブロック２（FC又はAｌ
の鋳物）はシリンダヘッド部３とシリンダブロック部４
を一体に備え且つ燃料噴射弁５（取付け部のみ図示）
と、連通したヘッド側冷却水室６、ライナ側冷却水室７
と、連通口８を有する隔壁９と、連通口８を外部から明
ける為の錐孔を塞ぐ盲プラグ１０と、燃焼室１１（この
室の円筒状内面はそれ自体がライナを形成する場合の外
に別のライナが圧入されるか鋳込まれる）と、燃焼室１
１内から熱負荷を受ける噴射弁ガイド部１２と、隔壁９
及び後述する隔壁１３（図２）により図１の右側と左側
に区画される供給水室１４（水室６、７の右半分）及び
排出水室１５（水室６、７の左半分）と、図示されてい
ない冷却水ポンプの吐出口に連通した冷却水導入口１６
と、気筒間のシリンダブロック部４の肉厚内に設けられ
て供給水室１４と排出水室１５をつなぐライナ側連通水
路１７と、排気通路１８及び給気通路１９を有する筒状
部とを備えている。FIG. 1 shows a first cylinder (No. 1 Cyl.) Of a monoblock engine 1 according to the first aspect of the present invention.
Is a vertical sectional front view of an engine block 2 (FC or Al).
Is a cylinder head 3 and a cylinder block 4
And the fuel injection valve 5 (only the mounting portion is shown)
And the head side cooling water chamber 6 and the liner side cooling water chamber 7
A partition 9 having a communication port 8; a blind plug 10 for closing a conical hole for opening the communication port 8 from the outside; and a combustion chamber 11 (the cylindrical inner surface of this chamber is the outer surface when the liner itself forms a liner). Another liner is pressed or cast into the combustion chamber 1).
1, an injection valve guide portion 12 receiving a thermal load from inside,
A supply water chamber 14 (the right half of the water chambers 6 and 7) and a discharge water chamber 15 (the left half of the water chambers 6 and 7) partitioned on the right and left sides of FIG. , A cooling water inlet 16 communicating with a discharge port of a cooling water pump (not shown).
A liner-side communication water passage 17 provided within the thickness of the cylinder block portion 4 between the cylinders and connecting the supply water chamber 14 and the discharge water chamber 15, and a cylindrical portion having an exhaust passage 18 and an air supply passage 19. Have.
【００１０】図１のＩＩ−ＩＩ断面略図である図２のよ
うに、この実施例では各気筒が夫々２個の排気弁２１と
吸気弁２２を備え、筒状の排気弁ガイド部２３、２３は
隔壁２４で一体化されており、噴射弁ガイド部１２と排
気弁ガイド部２３、２３、隔壁２４の間の湾曲した狭い
連通水路２５の一端は連通口８を介してれて供給水室１
４に連通し、他端は排出水室１５に連通している。図２
の噴射弁ガイド部１２、排気弁ガイド部２３、２３、隔
壁２４は熱負荷の高い過熱部である。図３は図１のＩＩ
Ｉ−ＩＩＩ断面図である。As shown in FIG. 2, which is a schematic sectional view taken along the line II-II of FIG. 1, in this embodiment, each cylinder has two exhaust valves 21 and two intake valves 22, and the exhaust guides 23, 23 have a cylindrical shape. Is integrated by a partition wall 24, and one end of a curved narrow communication water passage 25 between the injection valve guide section 12, the exhaust valve guide sections 23, 23, and the partition wall 24 is connected via the communication port 8 to the supply water chamber 1.
4 and the other end thereof communicates with the discharge water chamber 15. FIG.
The injection valve guide portion 12, the exhaust valve guide portions 23, 23, and the partition wall 24 are superheated portions having a high heat load. FIG. 3 is II of FIG.
It is I-III sectional drawing.
【００１１】エンジンの運転中に冷却水導入口１６から
シリンダヘッド部３の供給水室１４内へ供給された冷た
い冷却水の大部分（例えば７０〜８０％）が気筒毎に大
径の連通口８から矢印Ａのように噴射弁ガイド部１２へ
向かい流れて衝突し、連通水路２５の一端から他端へ流
れ、その間に連通水路２５に面した噴射弁ガイド部１
２、排気弁ガイド部２３、２３、隔壁２４等の過熱部を
有効に冷却し、排出水室１５へ出て矢印Ｂ方向に流れ、
出口２６から例えば排気マニホールドの水室へ供給され
る。同時に、残りの冷たい冷却水は細いライナ側連通水
路１７（図１・・水平でなくとも良い）を通り排出水室
１５に入り、その間に燃焼室１１の上端に近い気筒間の
シリンダブロック部４を有効に冷却する。ライナ側連通
水路１７より低い燃焼室１１に面したライナ部分はライ
ナ側冷却水室７内にほぼ滞留する冷却水により緩やかに
冷却され、好ましい温度に保持される。During operation of the engine, most (for example, 70 to 80%) of the cold cooling water supplied from the cooling water inlet 16 into the supply water chamber 14 of the cylinder head portion 3 has a large diameter communication port for each cylinder. 8 flows toward the injection valve guide portion 12 as shown by the arrow A, collides with it, flows from one end of the communication water passage 25 to the other end, and the injection valve guide portion 1 facing the communication water passage 25 therebetween.
2. Effectively cooling the superheated parts such as the exhaust valve guide parts 23, 23, the partition wall 24, etc., flows out to the discharge water chamber 15, flows in the direction of arrow B,
From the outlet 26, for example, water is supplied to a water chamber of the exhaust manifold. At the same time, the remaining cold cooling water enters the discharge water chamber 15 through the thin liner-side communication water passage 17 (FIG. 1, not necessarily horizontal), during which the cylinder block portion 4 between the cylinders close to the upper end of the combustion chamber 11 is formed. To effectively cool. The liner portion facing the combustion chamber 11 lower than the liner-side communication water passage 17 is gradually cooled by cooling water substantially staying in the liner-side cooling water chamber 7 and is maintained at a preferable temperature.
【００１２】図２のように、２個の排気弁２１を有する
エンジンに請求項１を採用すると、過熱部に面した湾曲
した長い連通水路２５を形成することができ、過熱部に
対する冷却効果が増大する。しかも隔壁９を設けて連通
水路２５の入口の室２７にまず大部分の冷却水を受け入
れるので、過熱部周辺の冷却効果が向上する。又供給水
室１４と排出水室１５を区画する為の隔壁１３を設けた
ので剛性が増し、熱による変形を可及的に少なく保ち得
る。更に、冷却水導入口１６を連通口８と同一水平面内
又はその近傍のヘッド側冷却水室６内に配置したので、
連通口８をライナ側連通水路１７より大径にしたことと
相俟って、過熱部ばかりでなく供給水室１４内の排気通
路１８の筒状部の冷却も有効に行える利点が生ずる。As shown in FIG. 2, when the first aspect is applied to an engine having two exhaust valves 21, a curved long communicating water channel 25 facing the superheated portion can be formed, and the cooling effect for the superheated portion can be improved. Increase. In addition, since the partition wall 9 is provided and most of the cooling water is first received in the chamber 27 at the entrance of the communication water channel 25, the cooling effect around the superheated portion is improved. Further, since the partition wall 13 for partitioning the supply water chamber 14 and the discharge water chamber 15 is provided, rigidity is increased, and deformation due to heat can be kept as small as possible. Furthermore, since the cooling water inlet 16 is arranged in the same horizontal plane as the communication port 8 or in the head side cooling water chamber 6 in the vicinity thereof,
Combined with the fact that the communication port 8 is made larger in diameter than the liner side communication water path 17, there is an advantage that not only the superheated section but also the cylindrical section of the exhaust passage 18 in the supply water chamber 14 can be effectively cooled.
【００１３】請求項２の発明の実施例を示す図４におい
て、図１〜図３内の符号と同一符号は対応部分である。
図４の第１隔壁３０と第２隔壁３１は夫々ヘッド側冷却
水室６とライナ側冷却水室７とを燃焼室１１の高い位置
で隔絶し且つ夫々供給水室１４側と排出水室１５側にあ
り、第２隔壁３１は第１隔壁３０よりもやや低く、第１
隔壁３０に連通口３２が開設され、ライナ側連通水路１
７は第１隔壁３０の下側と第２隔壁３１の上側を接続し
ている。In FIG. 4 showing the embodiment of the second aspect of the present invention, the same reference numerals as those in FIGS.
The first partition wall 30 and the second partition wall 31 in FIG. 4 separate the head side cooling water chamber 6 and the liner side cooling water chamber 7 at a higher position of the combustion chamber 11, respectively, and respectively provide the supply water chamber 14 and the discharge water chamber 15 respectively. Side, the second partition 31 is slightly lower than the first partition 30,
A communication port 32 is opened in the partition 30 and the liner-side communication waterway 1
Reference numeral 7 connects the lower side of the first partition 30 and the upper side of the second partition 31.
【００１４】第２隔壁３１を設けることによりライナ下
部側への冷却水量を抑え、ライナ下部の冷え過ぎを回避
できる。By providing the second partition 31, the amount of cooling water to the lower part of the liner can be suppressed, and the lower part of the liner can be prevented from being excessively cooled.
【００１５】請求項３の発明の実施例を示す図５におい
て、供給水室１４側のライナ側冷却水室７から過熱部へ
向かう導水管３５が鋳込み等の手段により設けられてお
り、冷却水導入口１６ａがライナ側冷却水室７の上端部
に対向開口している。この構造によると、導水管３５に
よる過熱部への冷却水の指向が容易且つ確実になる。In FIG. 5 showing an embodiment of the third aspect of the present invention, a water guide pipe 35 extending from the liner side cooling water chamber 7 on the side of the supply water chamber 14 to the superheated section is provided by means such as casting. The inlet 16 a is open at the upper end of the liner-side cooling water chamber 7. According to this structure, it is easy and reliable to direct the cooling water to the superheated portion by the water pipe 35.
【００１６】請求項４の発明の実施例を示す図６におい
て、シリンダヘッド部３の上面にボルト等で固定された
別体ブロック３７（動弁機構内蔵）内の冷却水供給水室
３８と過熱部へ向かうヘッド側導水路３９が接続してい
る。この構造によると、冷却水導入口１６から供給され
た冷却水の全量をまず過熱部へ吹きつけることが出来、
冷却効果が向上する。Referring to FIG. 6 showing an embodiment of the present invention, a cooling water supply water chamber 38 in a separate block 37 (built-in valve operating mechanism) fixed to an upper surface of the cylinder head portion 3 with bolts or the like is superheated. The head-side headrace channel 39 toward the section is connected. According to this structure, the entire amount of the cooling water supplied from the cooling water inlet 16 can be first blown to the superheated portion,
The cooling effect is improved.
【００１７】請求項５の発明の実施例を示す図７、図８
において、シリンダヘッド部３の側面にボルト等で固定
された吸気マニホールド４１内の冷却水供給水室４２と
過熱部へ向かうヘッド側導水路４３が接続している。こ
の構造によると、冷却水導入口から冷却水供給水室４２
へ供給された冷却水の全量をまず過熱部へ吹きつけた後
にその他の部分を冷却して出口２６から排出することが
出来、冷却効果が向上する。FIGS. 7 and 8 show an embodiment of the invention of claim 5.
The cooling water supply water chamber 42 in the intake manifold 41 fixed to the side surface of the cylinder head 3 with bolts or the like is connected to the head-side water conduit 43 toward the superheated section. According to this structure, the cooling water supply water chamber 42
After the entire amount of the cooling water supplied to the heater is first blown to the superheated portion, the other portions can be cooled and discharged from the outlet 26, thereby improving the cooling effect.
【００１８】[0018]
【発明の効果】請求項１の発明によると、ヘッド側の過
熱部に集中的に冷却水を流して、冷却効果を高めること
ができる。ライナ側下部の過冷却を防止出来る効果もあ
る。請求項２の発明によると、請求項１の発明による上
記効果の他に、ライナ側連通水路１７によりライナ上部
の過熱されやすい部分を有効に冷却できる。請求項３の
発明によると、請求項１の発明による上記効果の他に、
導水管３５による過熱部への冷却水の指向が容易且つ確
実になる。請求項４の発明によると、請求項１の発明に
よる上記効果の他に、冷却水導入口１６から供給された
冷却水の全量をまず過熱部へ吹きつけることが出来、冷
却効果が向上する。請求項５の発明によると、請求項１
の発明による上記効果の他に、冷却水導入口から冷却水
供給水室４２へ供給された冷却水の全量をまず過熱部へ
吹きつけた後にその他の部分を冷却して出口２６から排
出することが出来、冷却効果が向上する。According to the first aspect of the present invention, the cooling effect can be enhanced by intensively flowing cooling water to the superheated portion on the head side. It also has the effect of preventing overcooling of the lower part on the liner side. According to the second aspect of the invention, in addition to the above-described effects of the first aspect of the invention, the liner-side communication water passage 17 can effectively cool a portion of the upper portion of the liner that is easily overheated. According to the third aspect of the invention, in addition to the above-described effects of the first aspect of the invention,
Direction of the cooling water to the superheated portion by the water guide pipe 35 is easy and reliable. According to the invention of claim 4, in addition to the effect of the invention of claim 1, the entire amount of the cooling water supplied from the cooling water inlet 16 can be first blown to the superheating portion, and the cooling effect is improved. According to the invention of claim 5, claim 1
In addition to the above effects according to the invention, the entire amount of the cooling water supplied from the cooling water inlet to the cooling water supply water chamber 42 is first sprayed to the superheated part, and then the other parts are cooled and discharged from the outlet 26. And the cooling effect is improved.
【図１】 請求項１の発明によるモノブロックエンジン
の要部縦断正面図である。FIG. 1 is a longitudinal sectional front view of a main part of a monobloc engine according to the invention of claim 1;
【図２】 図１のＩＩ−ＩＩ断面略図である。FIG. 2 is a schematic sectional view taken along the line II-II of FIG.
【図３】 図１のIII−III断面略図である。FIG. 3 is a schematic sectional view taken along the line III-III of FIG. 1;
【図４】 請求項２の発明によるモノブロックエンジン
の要部縦断正面図である。FIG. 4 is a longitudinal sectional front view of a main part of the monobloc engine according to the invention of claim 2;
【図５】 請求項３の発明によるモノブロックエンジン
の要部縦断正面図である。FIG. 5 is a longitudinal sectional front view of a main part of the monoblock engine according to the invention of claim 3;
【図６】 請求項４の発明によるモノブロックエンジン
の要部縦断面図である。FIG. 6 is a longitudinal sectional view of a main part of a monoblock engine according to the invention of claim 4;
【図７】 請求項５の発明によるモノブロックエンジン
の要部縦断正面部分図である。FIG. 7 is a vertical sectional front view of a main part of the monobloc engine according to the invention of claim 5;
【図８】 図７のVIII−VIII断面図である。FIG. 8 is a sectional view taken along line VIII-VIII of FIG.
３ シリンダヘッド部 ４ シリンダブロック部 ５ 燃料噴射弁 ６ ヘッド側水室 ７ ライナ側水室 １２ 噴射弁ガイド部 １４ 供給水室 １５ 排出水室 １７ ライナ側連通水路 ２１ 排気弁 ２３ 排気弁ガイド部 ２５ 連通水路 ３０ 第１隔壁 ３１ 第２隔壁 ３２ 連通口 ３５ 導水管 ３９ ヘッド側導水路 ４３ ヘッド側導水路 Reference Signs List 3 Cylinder head part 4 Cylinder block part 5 Fuel injection valve 6 Head side water chamber 7 Liner side water chamber 12 Injection valve guide part 14 Supply water chamber 15 Drain water chamber 17 Liner side communication water path 21 Exhaust valve 23 Exhaust valve guide part 25 Communication Waterway 30 First partition 31 Second partition 32 Communication port 35 Water pipe 39 Head-side waterway 43 Head-side waterway
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１０年１２月２１日（１９９８．１２．
２１）[Submission date] December 21, 1998 (1998.12.
21)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】図面[Document name to be amended] Drawing
【補正対象項目名】全図[Correction target item name] All figures
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【図２】 FIG. 2
【図１】 FIG.
【図３】 FIG. 3
【図４】 FIG. 4
【図５】 FIG. 5
【図６】 FIG. 6
【図７】 FIG. 7
【図８】 FIG. 8
Claims (5)
を一体に形成し、各気筒が燃料噴射弁と、連通したヘッ
ド側冷却水室、ライナ側冷却水室とを有する形式のモノ
ブロックエンジンにおいて、ヘッド側冷却水室を一方の
供給水室と他方の排出水室とに隔絶し、シリンダヘッド
部の肉厚内の燃料噴射弁を囲む噴射弁ガイド部と排気弁
を囲む排気弁ガイド部との間の連通水路の一端を供給水
室へ、又他端を排出水室へ接続して、上記噴射弁ガイド
部と排気弁ガイド部からなる過熱部を有効に冷却するこ
とを特徴とするモノブロックエンジンのヘッド過熱部冷
却構造。1. A monoblock engine of a type in which a cylinder head portion and a cylinder block portion are integrally formed, and each cylinder has a fuel injection valve, a head-side cooling water chamber and a liner-side cooling water chamber communicating with each other. The side cooling water chamber is separated into one supply water chamber and the other discharge water chamber, and between the injection valve guide section surrounding the fuel injection valve and the exhaust valve guide section surrounding the exhaust valve in the thickness of the cylinder head. A monoblock engine characterized in that one end of the communication water passage is connected to a supply water chamber and the other end is connected to a discharge water chamber to effectively cool a superheated portion comprising the injection valve guide portion and the exhaust valve guide portion. Head heating structure cooling structure.
を一体に形成し、各気筒が燃料噴射弁と、連通したヘッ
ド側冷却水室、ライナ側冷却水室とを有する形式のモノ
ブロックエンジンにおいて、ヘッド側冷却水室を一方の
供給水室と他方の排出水室とで構成し、燃料噴射弁と排
気弁近傍の過熱部に冷却水を導くようにすると共に、ヘ
ッド側冷却水室とライナ側冷却水室とを上下に隔絶する
供給水室側の第１隔壁と排出水室側の第２隔壁とを設
け、第１隔壁に連通口を開設し、第１隔壁の下部と第２
隔壁の上部をつなぐライナ側連通水路を設けたことを特
徴とするモノブロックエンジンのヘッド過熱部冷却構
造。2. A monoblock engine of a type in which a cylinder head portion and a cylinder block portion are integrally formed, and each cylinder has a fuel injection valve, a head side cooling water chamber and a liner side cooling water chamber communicating with each other. The side cooling water chamber is composed of one supply water chamber and the other discharge water chamber. The cooling water is guided to the superheated portion near the fuel injection valve and the exhaust valve, and the head side cooling water chamber and the liner side cooling water are introduced. A first partition on the side of the supply water chamber and a second partition on the side of the discharge water chamber that vertically separate the water chamber are provided, a communication port is opened in the first partition, and the lower part of the first partition and the second partition are opened.
A head overheating part cooling structure for a monobloc engine, wherein a liner-side communication water passage connecting an upper part of the partition wall is provided.
を一体に形成し、各気筒が燃料噴射弁と、連通したヘッ
ド側冷却水室、ライナ側冷却水室とを有する形式のモノ
ブロックエンジンにおいて、ヘッド側冷却水室を一方の
供給水室と他方の排出水室とで構成し、燃料噴射弁と排
気弁近傍の過熱部に冷却水を導くようにすると共に、ヘ
ッド側冷却水室とライナ側冷却水室とを上下に隔絶する
供給水室側の第１隔壁と排出水室側の第２隔壁とを設
け、第１隔壁に連通口を開設し、第１隔壁の下部と第２
隔壁の上部をつなぐライナ側連通水路を設け、供給水室
側のライナ側冷却水室から過熱部に向かう導水管を付設
したことを特徴とするモノブロックエンジンのヘッド過
熱部冷却構造。3. A monoblock engine of a type in which a cylinder head portion and a cylinder block portion are integrally formed and each cylinder has a fuel injection valve, a head-side cooling water chamber and a liner-side cooling water chamber communicating with each other. The side cooling water chamber is composed of one supply water chamber and the other discharge water chamber. The cooling water is guided to the superheated portion near the fuel injection valve and the exhaust valve, and the head side cooling water chamber and the liner side cooling water are introduced. A first partition on the side of the supply water chamber and a second partition on the side of the discharge water chamber that vertically separate the water chamber are provided, a communication port is opened in the first partition, and the lower part of the first partition and the second partition are opened.
A head superheated part cooling structure for a monoblock engine, comprising: a liner-side communication water passage connecting the upper parts of the partition walls;
を一体に形成し、各気筒が燃料噴射弁と、連通したヘッ
ド側冷却水室、ライナ側冷却水室とを有する形式のモノ
ブロックエンジンにおいて、ヘッド側冷却水室を一方の
供給水室と他方の排出水室とで構成し、燃料噴射弁と排
気弁近傍の過熱部に冷却水を導くようにすると共に、シ
リンダヘッド部の上側に別体ブロックを取付け、この別
体ブロックに形成した冷却水供給水室を過熱部へ向かう
ヘッド側導水路に接続して過熱部を有効に冷却するよう
にしたことを特徴とするモノブロックエンジンのヘッド
過熱部冷却構造。4. A monoblock engine of a type in which a cylinder head portion and a cylinder block portion are integrally formed, and each cylinder has a fuel injection valve, a head-side cooling water chamber and a liner-side cooling water chamber communicating with each other. The side cooling water chamber is composed of one supply water chamber and the other discharge water chamber. The cooling water is guided to the superheated portion near the fuel injection valve and the exhaust valve, and a separate block is provided above the cylinder head. And a cooling water supply water chamber formed in the separate block is connected to a head-side water passage toward the superheating portion to effectively cool the superheating portion. Cooling structure.
を一体に形成し、各気筒が燃料噴射弁と、連通したヘッ
ド側冷却水室、ライナ側冷却水室とを有する形式のモノ
ブロックエンジンにおいて、ヘッド側冷却水室を一方の
供給水室と他方の排出水室とで構成し、シリンダヘッド
部に吸気マニホールドを取付け、この吸気マニホールド
に形成した冷却水供給水室を過熱部へ向かうヘッド側導
水路に接続して過熱部を有効に冷却するようにしたこと
を特徴とするモノブロックエンジンのヘッド過熱部冷却
構造。5. A monoblock engine of a type in which a cylinder head portion and a cylinder block portion are integrally formed and each cylinder has a fuel injection valve, a head side cooling water chamber and a liner side cooling water chamber communicating with each other. The side cooling water chamber is composed of one supply water chamber and the other discharge water chamber, an intake manifold is attached to the cylinder head, and the cooling water supply water chamber formed in this intake manifold is directed to the head side water passage toward the superheating section. A head superheated part cooling structure for a monobloc engine, wherein the head superheated part is effectively cooled by connecting to the head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10339101A JP2000161130A (en) | 1998-11-30 | 1998-11-30 | Head overheat part cooling structure for monoblock engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10339101A JP2000161130A (en) | 1998-11-30 | 1998-11-30 | Head overheat part cooling structure for monoblock engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000161130A true JP2000161130A (en) | 2000-06-13 |
Family
ID=18324278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10339101A Pending JP2000161130A (en) | 1998-11-30 | 1998-11-30 | Head overheat part cooling structure for monoblock engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000161130A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005535819A (en) * | 2002-06-21 | 2005-11-24 | エフエーファオ モトレンテクニーク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Cooling cylinder head for piston engine |
| KR101394767B1 (en) * | 2013-08-16 | 2014-05-16 | 현대중공업 주식회사 | Clean engine with simplified pathway of cooling water |
| CN104696093A (en) * | 2013-12-09 | 2015-06-10 | 福特环球技术公司 | Engine having composite cylinder block |
| JP6090535B2 (en) * | 2014-06-30 | 2017-03-08 | 日産自動車株式会社 | Internal combustion engine |
| JPWO2016001987A1 (en) * | 2014-06-30 | 2017-04-27 | 日産自動車株式会社 | Internal combustion engine |
| JP2021055583A (en) * | 2019-09-27 | 2021-04-08 | ダイハツ工業株式会社 | Mono-block type main body block of multicylinder internal combustion engine |
-
1998
- 1998-11-30 JP JP10339101A patent/JP2000161130A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005535819A (en) * | 2002-06-21 | 2005-11-24 | エフエーファオ モトレンテクニーク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Cooling cylinder head for piston engine |
| KR101394767B1 (en) * | 2013-08-16 | 2014-05-16 | 현대중공업 주식회사 | Clean engine with simplified pathway of cooling water |
| CN104696093A (en) * | 2013-12-09 | 2015-06-10 | 福特环球技术公司 | Engine having composite cylinder block |
| JP6090535B2 (en) * | 2014-06-30 | 2017-03-08 | 日産自動車株式会社 | Internal combustion engine |
| JPWO2016001987A1 (en) * | 2014-06-30 | 2017-04-27 | 日産自動車株式会社 | Internal combustion engine |
| JP2021055583A (en) * | 2019-09-27 | 2021-04-08 | ダイハツ工業株式会社 | Mono-block type main body block of multicylinder internal combustion engine |
| JP7323262B2 (en) | 2019-09-27 | 2023-08-08 | ダイハツ工業株式会社 | Monoblock body block for multi-cylinder internal combustion engine |
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