JPS593179Y2 - cylinder head - Google Patents
cylinder headInfo
- Publication number
- JPS593179Y2 JPS593179Y2 JP4888979U JP4888979U JPS593179Y2 JP S593179 Y2 JPS593179 Y2 JP S593179Y2 JP 4888979 U JP4888979 U JP 4888979U JP 4888979 U JP4888979 U JP 4888979U JP S593179 Y2 JPS593179 Y2 JP S593179Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder head
- tightening
- intake port
- intake
- 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
Links
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】
本考案は頭上弁式エンジンのシリンダヘッドの構造に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a cylinder head for an overhead valve type engine.
従来のこの種シリンダヘッドの１例を第１図ａ、 ｌ）
に示す。An example of a conventional cylinder head of this type is shown in Figure 1 a, l).
Shown below.
図において、吸気ポート０１内にボルトが貫通するのを
避けて、シリンダヘッドのシリンダ取付面側に植込ボル
トＡをたて、シリンダ０２１側よりナラ）Ｂで締付けて
いる。In the figure, a stud bolt A is placed on the cylinder mounting surface side of the cylinder head to avoid the bolt penetrating into the intake port 01, and is tightened with a bolt B from the cylinder 021 side.
ポル）Ａの位置を外側へ移すことも考えられるが、全体
の寸法が大きくなりすぎる。It is also possible to move the position of A to the outside, but the overall size would become too large.
なお、０２は吸気フランジ、０３はヘッドカバー取付面
、０８は弁案内、０９は点火栓ねし穴、０１０は排気フ
ランジ、０１１は排気ポート、０１２はブツシュロッド
穴、Ａ′は植込ボルトであ２る。In addition, 02 is the intake flange, 03 is the head cover mounting surface, 08 is the valve guide, 09 is the spark plug hole, 010 is the exhaust flange, 011 is the exhaust port, 012 is the bushing rod hole, and A' is the stud bolt. Ru.
この場合は、自動締付は困難で組立時間がかかる欠点が
ある。In this case, automatic tightening is difficult and assembly time is required.
従来構造の他の例を第２図ａ、 ｌ）に示す。Other examples of conventional structures are shown in Figures 2a and 1).
第２図ａのように、吸気ポート０１が取付穴Ｃを避けれ
ば、上方より締付けが可能となる。As shown in FIG. 2a, if the intake port 01 avoids the mounting hole C, it becomes possible to tighten from above.
但し、この場合吸気ポート０１が曲がるので、吸入効率
が低下し出力が下がる。However, in this case, since the intake port 01 is bent, the intake efficiency decreases and the output decreases.
また鋳造が困難となる欠点を有する。It also has the disadvantage of being difficult to cast.
なお、各符号は第１図ａ、 ｌ）と同じものを示し、
Ｃ′は取付穴、Ｄは肉厚を示す。In addition, each symbol indicates the same thing as in Figure 1 a, l),
C' indicates the mounting hole, and D indicates the wall thickness.
本考案の目的は上記の欠点を排除し、製作（組立、鋳造
）容易で、しかも吸入効率の良い（出力のよく出る）シ
リンダヘッドを提運することであり、その特徴とすると
ころは、吸気ポートを鋳造性、性能面を考慮し直障状と
し、それを貫通して締付ボルト穴を設置し、空気洩れの
ないようにシールしたことである。The purpose of this invention is to eliminate the above-mentioned drawbacks, and to provide a cylinder head that is easy to manufacture (assemble, cast) and has good suction efficiency (high output). In consideration of castability and performance, the port was made into a straight hole, and a tightening bolt hole was installed through it to seal it to prevent air leakage.
以下図面を参照して本考案による１実施例につき説明す
る。An embodiment of the present invention will be described below with reference to the drawings.
第３図ａは本考案による１実施例のシリンダヘッドを示
す上面図、第３図すは第３図ａのＺ−Ｚ矢視断面図であ
る。FIG. 3a is a top view showing a cylinder head according to an embodiment of the present invention, and FIG. 3a is a sectional view taken along the Z-Z arrow in FIG. 3a.
図において、１は吸気ポート、２は吸気フランジ、３は
シリンダヘッドカバー取付面、４，５゜６．７は締付ボ
ルト穴であり、締付ボルト穴４は図示のように吸気ポー
ト１を貫通している。In the figure, 1 is the intake port, 2 is the intake flange, 3 is the cylinder head cover mounting surface, 4,5°6.7 is the tightening bolt hole, and the tightening bolt hole 4 passes through the intake port 1 as shown in the figure. are doing.
８は弁案内、９は点火栓取付ねじ穴、１０は排気フラン
ジ、１１は排気ポート、１２は弁押棒挿入穴、２１はシ
リンダである。8 is a valve guide, 9 is a spark plug mounting screw hole, 10 is an exhaust flange, 11 is an exhaust port, 12 is a valve push rod insertion hole, and 21 is a cylinder.
２２は締付ボルト穴４のシリンダ側の端部に装着された
シールリングで、ガスケット２５の一部をなしている。A seal ring 22 is attached to the cylinder side end of the tightening bolt hole 4 and forms a part of the gasket 25.
２３は同ボルト穴４の他端部に装着されたシールリング
、２４はシリンダヘッド締付座付ボルトである。23 is a seal ring attached to the other end of the bolt hole 4, and 24 is a bolt with a seat for tightening the cylinder head.
上記構成の場合の作用について述べる。The operation in the case of the above configuration will be described.
頭上弁式機関のシリンダヘッドには、吸、排気ポートが
設置されている。The cylinder head of an overhead valve engine has intake and exhaust ports installed.
吸気ポートより吸入された混合気は燃焼室（図示しない
）で爆発した後、排気ポートより排出される。The air-fuel mixture taken in through the intake port explodes in a combustion chamber (not shown) and then is discharged through the exhaust port.
車体搭載時の気化器、消音器の配置上、図示のように吸
、排気ポート１゜１１の位置を定める。Due to the placement of the carburetor and muffler when mounted on the vehicle, determine the positions of the intake and exhaust ports 1° and 11 as shown in the figure.
締付ボルト穴４．５．６、７の位置はボルトのピッチ、
鋳造の型抜き、組付の難易を考慮し、図示のように決め
る。The positions of tightening bolt holes 4, 5, 6 and 7 are determined by the bolt pitch,
Considering the difficulty of cutting out the casting mold and assembling, decide as shown.
この場合、穴４は吸気ポート１を貫通する。In this case, the hole 4 passes through the intake port 1.
吸気ポート１は負圧となるので（ガソリンエンジンでは
気化器絞弁閉の状態、即ち軽負荷で負圧が大きくなる）
、シールリング２２．２３で鉄部からの空気洩れを防ぐ
。Intake port 1 has a negative pressure (in a gasoline engine, the negative pressure increases when the carburetor throttle valve is closed, i.e. under light load)
, seal rings 22 and 23 prevent air leakage from the iron part.
なお、シールリングの代りにバッキングを設けてもよい
。Note that a backing may be provided instead of the seal ring.
上述のような本考案による場合は、次の効果がある。The present invention as described above has the following effects.
（１）吸、排気ポー）１，１１が、第３図ａで判るよう
に、直線となっているので１、鋳物はダイキャストが可
能である。(1) Intake and exhaust ports) 1 and 11 are straight lines as seen in Figure 3a, so die casting is possible.
即ち、コストが低減できる。（２）また曲りがないので
、性能が向上する（第２図すの肉厚りを削っているので
、吸気ポーＩ・の断面積を大きく取ることができ、吸気
ポートも直線となる）。That is, costs can be reduced. (2) Also, since there is no bending, performance is improved (since the wall thickness in Figure 2 is reduced, the cross-sectional area of the intake port I can be increased, and the intake port is also straight).
（３）締付けが上方より可能であるので、組立が容易と
なる。(3) Assembly is easy because tightening can be done from above.
第１図ａは従来のシリンダヘッドの１例を示す上面図、
第１図すは第１図ａのＸ−Ｘ矢視断面図、第２図ａは従
来のシリンダヘッドの他の例を示す上面図、第２図すは
第２図ａのＹ−Ｙ矢視断面図、第３図ａは本考案による
１実施例のシリンダヘッドを示す上面図、第３図すは第
３図ａのＺ−Ｚ矢視断面図である。
１・・・吸気ポート、２・・・吸気フランジ、３・・・
ヘッドカバー取付面、４．５．６、７・・・締付ボルト
穴、１０・・・排気フランジ、１１・・・排気ポート、
２１・・・シリンダ、２２．２３・・・シールリング、
２４・・・シリンダヘッド締付座付ボルト、２５・・・
ガスケット。FIG. 1a is a top view showing an example of a conventional cylinder head;
Figure 1 is a sectional view taken along the line X-X in Figure 1a, Figure 2a is a top view showing another example of a conventional cylinder head, and Figure 2 is a cross-sectional view taken along the line Y-Y in Figure 2a. FIG. 3a is a top view showing a cylinder head according to an embodiment of the present invention, and FIG. 3a is a sectional view taken along the Z-Z line in FIG. 3a. 1...Intake port, 2...Intake flange, 3...
Head cover mounting surface, 4.5.6, 7... Tightening bolt hole, 10... Exhaust flange, 11... Exhaust port,
21...Cylinder, 22.23...Seal ring,
24...Cylinder head tightening seat bolt, 25...
gasket.
Claims (1)
への締着用の締付ボルト穴のうちの１個を直線状に形成
された吸気ポートを貫通して設け、上記１個の締付ボル
ト穴の両端開口部に外気を遮断する密封部材を装着した
ことを特徴とするシリンダヘッド。In a cylinder head of an overhead valve type engine, one of the tightening bolt holes for tightening to the cylinder is provided through an intake port formed in a straight line, and both ends of the one tightening bolt hole are open. A cylinder head characterized by being equipped with a sealing member that blocks outside air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4888979U JPS593179Y2 (en) | 1979-04-14 | 1979-04-14 | cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4888979U JPS593179Y2 (en) | 1979-04-14 | 1979-04-14 | cylinder head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55149543U JPS55149543U (en) | 1980-10-28 |
| JPS593179Y2 true JPS593179Y2 (en) | 1984-01-28 |
Family
ID=28933452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4888979U Expired JPS593179Y2 (en) | 1979-04-14 | 1979-04-14 | cylinder head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS593179Y2 (en) |
-
1979
- 1979-04-14 JP JP4888979U patent/JPS593179Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55149543U (en) | 1980-10-28 |
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