JPH0639079Y2 - 4-valve multi-cylinder type cylinder head - Google Patents
4-valve multi-cylinder type cylinder headInfo
- Publication number
- JPH0639079Y2 JPH0639079Y2 JP2473688U JP2473688U JPH0639079Y2 JP H0639079 Y2 JPH0639079 Y2 JP H0639079Y2 JP 2473688 U JP2473688 U JP 2473688U JP 2473688 U JP2473688 U JP 2473688U JP H0639079 Y2 JPH0639079 Y2 JP H0639079Y2
- Authority
- JP
- Japan
- Prior art keywords
- air supply
- cylinder head
- water chamber
- cylinder
- fuel injection
- 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 - Lifetime
Links
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は４弁多気筒型シリンダーヘツドに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a four-valve multi-cylinder type cylinder head.
中心に燃料噴射ノズルを有する４弁多気筒型シリンダー
ヘツドでは、排気弁が２個並設されている関係上、シリ
ンダーヘツドの冷却をいかにしてよくするかが重要であ
り、水平隔壁でシリンダーヘツドの内部の冷却室を上下
の２室に仕切る構造も知られている。In a 4-valve multi-cylinder type cylinder head having a fuel injection nozzle in the center, it is important how to cool the cylinder head because two exhaust valves are arranged side by side. There is also known a structure in which a cooling chamber inside is divided into upper and lower chambers.
ここで、シリンダーヘツドの冷却をよくするためには、
その水平隔壁の位置をシリンダーヘツドの下面に近づけ
るのがよいのであるが、そうすると、シリンダーヘツド
の冷却はよくなる反面、シリンダーヘツドは大きな熱応
力を生ずので、水平隔壁にクラツクが発生するという問
題がある。Here, in order to improve the cooling of the cylinder head,
It is better to position the horizontal bulkhead closer to the bottom surface of the cylinder head.However, while cooling the cylinder head better, the cylinder head does not generate large thermal stress, which causes the problem of cracking of the horizontal bulkhead. is there.
本考案は、このような事情に鑑みて提案されたもので、
冷却効果が大きく、かつクラツクの発生することがな
い、強固な４弁多気筒型シリンダーヘツドを提供するこ
とを目的とする。The present invention has been proposed in view of such circumstances,
An object of the present invention is to provide a strong four-valve multi-cylinder type cylinder head that has a large cooling effect and does not cause cracking.
そのために本考案は、それぞれ燃料噴射ノズルの周りに
略等間隔に配設された２つの給気弁及び２つの排気弁を
縦方向の適宜間隔で複数組備えた４弁多気筒型シリンダ
ーヘツドにおいて、外端がそれぞれ給気マニホールドに
連結される縦方向の一側に適宜間隔で開口するとともに
内部隔壁により仕切られた上半部流路が一方の給気ポー
トに連通し下半部流路が他方の給気ポートに連通し、そ
れぞれ同一方向のスワールをもつて給気を上気両給気ポ
ートに導く複数の給気流路と、中立軸面上に延び上記各
給気流路及び排気流路と協働してシリンダーヘツド内部
を上部水室と下部水室とに仕切る水平仕切板と、上記水
平仕切板にそれぞれ開口し上記シリンダーヘツドに鉛直
方向に貫設された燃料噴射ノズルとの間に形成される環
状断面の複数の冷却水連通流路とを具えたことを特徴と
する。Therefore, the present invention is a four-valve multi-cylinder type cylinder head provided with a plurality of sets of two air supply valves and two exhaust valves, which are arranged at substantially equal intervals around the fuel injection nozzle, at appropriate intervals in the vertical direction. , The outer ends are opened at appropriate intervals on one side in the vertical direction connected to the air supply manifold, and the upper half flow path partitioned by the internal partition wall communicates with one air supply port and the lower half flow path is formed. A plurality of air supply passages communicating with the other air supply port and having swirls in the same direction to guide the air supply to both upper air supply ports, and the respective air supply passages and exhaust air passages extending on the neutral axis surface. Between the horizontal partition plate that divides the interior of the cylinder head into the upper water chamber and the lower water chamber in cooperation with the fuel injection nozzle that is vertically opened in the cylinder head. Multiple cooling of annular cross section formed Characterized in that comprises a water communication passage.
上述の構成により、シリンダーヘツドの内部は中立軸面
上に延びる水平隔壁により、上下の水室に仕切られ下部
水室中の冷却水は燃料噴射ノズルを囲繞する環状断面の
連通流路を経て上部水室に抵抗少なく流入することによ
り、シリンダーヘツドをよく冷却するとともに、連通流
路を通過の際、燃料噴射ノズルを効果的に冷却すること
ができ、さらに水平隔壁は中心軸面上にあるので、曲げ
モーメントによる応力は小さくなるから、クラツクの発
生が避けられる。With the above structure, the inside of the cylinder head is divided into upper and lower water chambers by the horizontal partition wall extending on the neutral axis surface, and the cooling water in the lower water chamber passes through the communication passage of the annular cross section surrounding the fuel injection nozzle to the upper portion. By flowing into the water chamber with little resistance, the cylinder head can be cooled well, and the fuel injection nozzle can be effectively cooled when passing through the communication passage, and the horizontal partition wall is on the central axis surface. Since the stress due to the bending moment becomes small, cracking can be avoided.
本考案を６気筒エンジンに適用した一実施例を図面につ
いて説明すると、第１図はその部分縦断面図、第２図は
第１図の横断面図、第３図は第１図の３気筒型シリンダ
ーヘツドを示す水平断面図、III-III縦断面図及びIII-I
II横断面図、第４図は第３図の排気マニホールド側を示
す側面図、第５図は第３図の吸気マニホールド側を示す
側面図である。An embodiment in which the present invention is applied to a 6-cylinder engine will be described with reference to the drawings. FIG. 1 is a partial longitudinal sectional view thereof, FIG. 2 is a transverse sectional view of FIG. 1, and FIG. 3 is a three-cylinder of FIG. Horizontal cross-section, III-III vertical cross-section, and III-I showing the mold cylinder head
II is a lateral sectional view, FIG. 4 is a side view showing the exhaust manifold side of FIG. 3, and FIG. 5 is a side view showing the intake manifold side of FIG.
まず、主として第１〜２図において、１は偏平長方形断
面を有する縦長の偏平箱状の３気筒型シリンダーヘツド
でその吸気マニホールド側の長手方向側面（第５図）に
は仕切板２′で上部ポート2u,下部ポート2Lに仕切られ
た３本の吸気ポート２の入口端が等間隔で開口し、その
排気マニホールド側（第４図）の長手方向側面には３本
の排気ポート３の出口端が３個等間隔で開口している。First, mainly in FIGS. 1 and 2, reference numeral 1 denotes a vertically elongated flat box-shaped three-cylinder type cylinder head having a flat rectangular cross section, and a partition plate 2'on the longitudinal side surface (FIG. 5) on the intake manifold side. The inlet ends of the three intake ports 2 partitioned into the port 2u and the lower port 2L are opened at equal intervals, and the outlet ends of the three exhaust ports 3 are on the longitudinal side surface on the exhaust manifold side (Fig. 4). Are open at equal intervals.
４はシリンダーヘツド１の水平中立軸面に延びその内部
空間を上部水室５と下部水室６とに仕切る水室隔壁、７
は水室隔壁４に設けられシリンダーヘツド１を貫通して
延びる燃料噴射ノズル９との間に形成された環状断面の
冷却水上昇用連通孔で、連通孔７は３個等間隔で配設さ
れている。Reference numeral 4 denotes a water chamber partition wall which extends to the horizontal neutral axis surface of the cylinder head 1 and divides the internal space into an upper water chamber 5 and a lower water chamber 6,
Is a communication hole for raising the cooling water of an annular cross section formed between the fuel chamber and the fuel injection nozzle 9 extending through the cylinder head 1 and three communication holes 7 are arranged at equal intervals. ing.
８はシリンダーヘツド１をシリンダーブロツクに連結す
るための複数の組立ボルト、10はシリンダーヘツド１の
上面で燃料噴射ノズル９の両側に植設された一対のガイ
ドロツドで、その上端にはＴ型ブリツジ11の支柱部が外
挿されている。Reference numeral 8 is a plurality of assembly bolts for connecting the cylinder head 1 to the cylinder block, 10 is a pair of guide rods planted on both sides of the fuel injection nozzle 9 on the upper surface of the cylinder head 1, and a T-shaped bridge 11 is provided at the upper end thereof. The column part of is extrapolated.
12は一対のほぼ平行するロツカーアームで、それぞれロ
ツカージヤフト13を介してシリンダーヘツド１に等間隔
で枢支され、各ロツカーアーム12はそれぞれカム16に連
動するローラータペツト15を下端に有するプツシユロツ
ド14により駆動され上端によりＴ型ブリツジ11を介して
一対の吸気弁，一対の排気弁を開閉する。17はロツカー
ケース、18はロツカーカバーである。Numeral 12 is a pair of substantially parallel rocker arms, each of which is pivotally supported by the cylinder head 1 at equal intervals via a rocker jift 13, and each rocker arm 12 is driven by a push rod 14 having a roller tapet 15 interlocked with a cam 16 at its lower end. The upper end opens and closes the pair of intake valves and the pair of exhaust valves via the T-shaped bridge 11. Reference numeral 17 is a rocker case, and 18 is a rocker cover.
このような構造において、吸気ポート２は第２図横断面
図及び第５図側面図に示すように、隔壁２′により上部
ポート2U,下部ポート2Lに仕切られ、上部ポート2Uは入
口端から遠い方の吸気弁に連通し、下部ポート2Lは入口
端に近い方の吸気弁に連通し、それぞれ同一方向のスワ
ールをもつて吸気を給気弁を経てシリンダーに供給する
ようにしている。In this structure, the intake port 2 is divided into an upper port 2U and a lower port 2L by a partition wall 2 ', as shown in the transverse sectional view of Fig. 2 and the side view of Fig. 5, and the upper port 2U is far from the inlet end. The lower port 2L communicates with the intake valve closer to the inlet end, and the lower port 2L communicates with the intake valve closer to the inlet end so that intake air is supplied to the cylinder through the intake valve with swirls in the same direction.
これに対し、排気ポート３は第３図水平断面図及び第４
図側面図に示すように、その内端は一対の排気弁に連通
し外端はシリンダーヘツド１の他側に等間隔で開口して
いる。On the other hand, the exhaust port 3 is shown in FIG.
As shown in the side view of the drawing, its inner end communicates with a pair of exhaust valves, and its outer end opens to the other side of the cylinder head 1 at equal intervals.
30（第２〜３図）はシリンダーヘツド１の給気マニホー
ルド側寄りに設けられ鉛直方向に貫設された３個の透孔
で、各透孔30にはそれぞれ一対のプツシユロツト14が挿
通している。Reference numerals 30 (Figs. 2 to 3) are three through holes which are provided near the air supply manifold side of the cylinder head 1 and which are vertically penetrated, and a pair of push rods 14 are inserted into the respective through holes 30. There is.
このような構造によれば下記作用効果が奏せられる。With such a structure, the following operational effects can be obtained.
（１）シリンダーブロツクの冷却水路を経て上昇する冷
却水はシリンダーヘツド１の下部水室６に導入され、こ
こで下部水室６を冷却したのち、３個の連通孔７を経て
上部水室５に導入され上部水室５を冷却したのちラジエ
ーターを経てシリンダーブロツクの冷却水路に戻る。(1) The cooling water rising through the cooling water passage of the cylinder block is introduced into the lower water chamber 6 of the cylinder head 1, where the lower water chamber 6 is cooled, and then the upper water chamber 5 is passed through the three communication holes 7. After cooling the upper water chamber 5 via the radiator, it returns to the cooling water passage of the cylinder block via the radiator.
（２）冷却水は下部水室６から上部水室５へ流れる際、
連通孔７にて燃料噴射ノズル９を効果的に冷却する。(2) When the cooling water flows from the lower water chamber 6 to the upper water chamber 5,
The communication hole 7 effectively cools the fuel injection nozzle 9.
（３）シリンダーヘツド１は曲げモーメントを受ける
が、吸気ポート，排気ポートは中立軸面上に延びる水室
隔壁４によりほぼ上下対称的に配設されているので、水
室隔壁及び吸排気ポートに発生する応力は非常に小さく
なるから、ここにクラツクが入ることがなく長寿命であ
る。(3) The cylinder head 1 receives a bending moment, but the intake port and the exhaust port are arranged substantially vertically symmetrically by the water chamber partition wall 4 extending on the neutral axis surface. Since the generated stress is extremely small, cracks do not enter here and the life is long.
（４）プツシユロツド挿通孔30もシリンダーヘツドの冷
却水により冷却されるので、同挿通孔及びプツシユロツ
ドに沿つて流下する潤滑油も効果的に冷却され、潤滑性
能を高めることができる。(4) Since the push rod insertion hole 30 is also cooled by the cooling water of the cylinder head, the lubricating oil flowing down along the insertion hole and the push rod is also effectively cooled, and the lubricating performance can be improved.
〔考案の効果〕 要するに本考案によれば、それぞれ燃料噴射ノズルの周
りに略等間隔に配設された２つの給気弁及び２つの排気
弁を縦方向の適宜間隔で複数組備えた４弁多気筒型シリ
ンダーヘツドにおいて、外端がそれぞれ給気マニホール
ドに連結される縦方向の一側に適宜間隔で開口するとと
もに内部隔壁により仕切られた上半部流路が一方の給気
ポートに連通し下半部流路が他方の給気ポートに連通
し、それぞれ同一方向のスワールをもつて給気を上記両
給気ポートに導く複数の給気流路と、中立軸面上に延び
上記各給気流路及び排気流路と協働してシリンダーヘツ
ド内部を上部水室と下部水室とに仕切る水平仕切板と、
上記水平仕切板にそれぞれ開口し上記シリンダーヘツド
に鉛直方向に貫設された燃料噴射ノズルとの間に形成さ
れる環状断面の複数の冷却水連通流路とを具えたことに
より、冷却効果が大きく、かつクラツクの発生すること
がない強固な４弁多気筒型シリンダーヘツドを得るから
本考案は産業上極めて有益なものである。[Effect of the Invention] In short, according to the present invention, a four-valve having a plurality of sets of two air supply valves and two exhaust valves, which are arranged around the fuel injection nozzle at substantially equal intervals, at appropriate intervals in the vertical direction. In the multi-cylinder type cylinder head, the outer ends are opened at appropriate intervals on one side in the vertical direction connected to the air supply manifold, and the upper half flow path partitioned by the internal partition wall communicates with one air supply port. The lower half flow passage communicates with the other air supply port and has a plurality of air supply passages having swirls in the same direction to guide the air supply to the both air supply ports, and each of the air supply air flows extending on the neutral axis surface. A horizontal partition plate that partitions the inside of the cylinder head into an upper water chamber and a lower water chamber in cooperation with the passage and the exhaust flow passage,
By having a plurality of cooling water communication passages of an annular cross section formed between the horizontal partition plate and the fuel injection nozzle vertically penetrating the cylinder head, the cooling effect is large. In addition, the present invention is extremely useful industrially because a strong 4-valve multi-cylinder type cylinder head that does not cause cracking is obtained.
第１図は本考案を６シリンダーエンジンに適用した一実
施例を示す部分縦断面図、第２図は第１図の横断面図、
第３図は第１図の３気筒型シリンダーヘツドを示す水平
断面図、III-III縦断面図及びIII′‐III′横断面図、
第４図は第３図の排気マニホールド側を示す側面図、第
５図は第３図の吸気マニホールド側を示す側面図であ
る。 １……シリンダーヘツド、２……吸気ポート、2U……上
部ポート、2L……下部ポート、３……排気ポート、４…
…水室隔壁、５……上部水室、６……下部水室、７……
連通孔、８……組立ボルト、９……燃料噴射ノズル、10
……ガイドロツド、11……Ｔ型ブリツジ、12……ロツカ
ーアーム、13……ロツカーシヤフト、14……プツシユロ
ツド、15……ローラータベツト、16……カム、17……ロ
ツカーケース、18……ロツカーカバー、19……シリンダ
ーブロツク、30……プツシユロツド挿通孔FIG. 1 is a partial vertical sectional view showing an embodiment in which the present invention is applied to a 6-cylinder engine, and FIG. 2 is a lateral sectional view of FIG.
FIG. 3 is a horizontal sectional view, a III-III vertical sectional view and a III′-III ′ lateral sectional view showing the three-cylinder type cylinder head of FIG.
4 is a side view showing the exhaust manifold side of FIG. 3, and FIG. 5 is a side view showing the intake manifold side of FIG. 1 ... Cylinder head, 2 ... Intake port, 2U ... Upper port, 2L ... Lower port, 3 ... Exhaust port, 4 ...
… Water chamber partition wall, 5 …… Upper water chamber, 6 …… Lower water chamber, 7 ……
Communication hole, 8 ... Assembly bolt, 9 ... Fuel injection nozzle, 10
...... Guide rod, 11 ...... T type bridge, 12 ...... Rotker arm, 13 ...... Rotcher shaft, 14 ...... Pushrod, 15 ...... Roller tabet, 16 ...... Cam, 17 ...... Rotker case, 18 ...... Rotker cover, 19 ... … Cylinder block, 30 …… Pushrod insertion hole
Claims (1)
に配設された２つの給気弁及び２つの排気弁を縦方向の
適宜間隔で複数組備えた４弁多気筒型シリンダーヘツド
において、外端がそれぞれ、給気マニホールドに連結さ
れる縦方向の一側に適宜間隔で開口するとともに内部隔
壁により仕切られた上半部流路が一方の給気ポートに連
通し下半部流路が他方の給気ポートに連通し、それぞれ
同一方向のスワールをもつて給気を上記両給気ポートに
導く複数の給気流路と、中立軸面上に延び上記各給気流
路及び排気流路と協働してシリンダーヘツド内部を上部
水室と下部水室とに仕切る水平仕切板と、上記水平仕切
板にそれぞれ開口し上記シリンダーヘツドに鉛直方向に
貫設された燃料噴射ノズルとの間に形成される環状断面
の複数の冷却水連通流路とを具えたことを特徴とする４
弁多気筒型シリンダーヘツド。1. A four-valve multi-cylinder type cylinder head provided with a plurality of two air supply valves and two exhaust valves, which are arranged at substantially equal intervals around a fuel injection nozzle, at appropriate intervals in the vertical direction, The outer ends are opened at appropriate intervals on one side in the vertical direction connected to the air supply manifold, and the upper half flow path partitioned by the internal partition wall communicates with one air supply port to form the lower half flow path. A plurality of air supply passages that communicate with the other air supply port and guide the air supply to the air supply ports with swirls in the same direction, and the air supply passages and the exhaust air passages extending on the neutral axis surface. Formed between a horizontal partition plate that cooperates to partition the inside of the cylinder head into an upper water chamber and a lower water chamber, and a fuel injection nozzle that is opened in the horizontal partition plate and vertically penetrates the cylinder head. Of multiple cooling water with circular cross section 4, characterized in that comprises a flow path
Valve multi-cylinder type cylinder head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2473688U JPH0639079Y2 (en) | 1988-02-26 | 1988-02-26 | 4-valve multi-cylinder type cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2473688U JPH0639079Y2 (en) | 1988-02-26 | 1988-02-26 | 4-valve multi-cylinder type cylinder head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01127952U JPH01127952U (en) | 1989-08-31 |
| JPH0639079Y2 true JPH0639079Y2 (en) | 1994-10-12 |
Family
ID=31244847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2473688U Expired - Lifetime JPH0639079Y2 (en) | 1988-02-26 | 1988-02-26 | 4-valve multi-cylinder type cylinder head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0639079Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5515385B2 (en) * | 2009-04-15 | 2014-06-11 | 株式会社Ｉｈｉ | Ignition device and burner device |
-
1988
- 1988-02-26 JP JP2473688U patent/JPH0639079Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01127952U (en) | 1989-08-31 |
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