JPS6214706B2 - - Google Patents
Info
- Publication number
- JPS6214706B2 JPS6214706B2 JP8327380A JP8327380A JPS6214706B2 JP S6214706 B2 JPS6214706 B2 JP S6214706B2 JP 8327380 A JP8327380 A JP 8327380A JP 8327380 A JP8327380 A JP 8327380A JP S6214706 B2 JPS6214706 B2 JP S6214706B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder head
- bolt
- gasket
- bolts
- stud
- 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
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【発明の詳細な説明】
この発明はエンジンのシリンダヘツド締着装置
の改良に関する。DETAILED DESCRIPTION OF THE INVENTION This invention relates to improvements in engine cylinder head fastening systems.
一般に、エンジンはシリンダブロツクの上面に
ガスケツトを介してシリンダヘツドを重ね、周囲
を複数のボルト又はスタツドボルトで、シリンダ
ヘツドをシリンダブロツクに締着している。シリ
ンダヘツドには一側に吸気孔が設けられ、他側に
排気孔が設けられているので、温度差が大きく、
特に排気孔側は排気ガスで熱せられるので高温に
なり、使用時と不使用時の温度差が大きい。又排
気孔側と吸気孔側の使用時の温度差は、空冷エン
ジンでは吸収しきれない。このため、特に排気孔
側がシリンダブロツクやシリンダヘツドの熱膨脹
による伸縮が大きく、この繰返しによつて間に挾
んだガスケツトにへたりが生じ、複元作用がなく
なつてシール効果が低下し、ガスが吹抜けるよう
になる。 Generally, in an engine, a cylinder head is stacked on the top surface of a cylinder block via a gasket, and the cylinder head is fastened to the cylinder block with a plurality of bolts or stud bolts around the cylinder head. The cylinder head has an intake hole on one side and an exhaust hole on the other side, so there is a large temperature difference.
In particular, the exhaust hole side is heated by exhaust gas, so it becomes high temperature, and there is a large temperature difference between when it is in use and when it is not in use. Also, the temperature difference between the exhaust port side and the intake port side during use cannot be fully absorbed by an air-cooled engine. For this reason, the expansion and contraction of the cylinder block and cylinder head due to thermal expansion is large, especially on the exhaust port side, and as a result of this repetition, the gasket sandwiched between them becomes sagging, the dual action is lost, the sealing effect is reduced, and the gas begins to blow through.
この発明はかかることがないように改善したも
ので、以下図面に示す本発明の実施例について説
明する。 This invention has been improved to avoid this problem, and embodiments of the invention shown in the drawings will be described below.
シリンダブロツク１の上面に、ガスケツト２を
介してシリンダヘツド３を重ね、ボルト又はスタ
ツドボルト４で、シリンダヘツド３をシリンダブ
ロツク１に周囲で複数個所にて締着する。而して
本発明は、吸気孔５側のボルト又はスタツドボル
ト４に対し、排気孔６側のボルト又はスタツドボ
ルト４を熱膨脹係数の大きい材質のものを使用す
る。具体的な例としては、吸気孔５側には通常の
膨脹係数１１程度の鋼製のボルト又はスタツドボ
ルト４を用いる。これに対し、排気孔６側は膨脹
係数17〜18程度の、オーステナイト系のステンレ
ス鋼等のボルト又はスタツドボルト４を使用す
る。 A cylinder head 3 is stacked on the upper surface of the cylinder block 1 via a gasket 2, and the cylinder head 3 is fastened to the cylinder block 1 at a plurality of locations around the cylinder block 1 with bolts or stud bolts 4. Accordingly, in the present invention, the bolt or stud bolt 4 on the exhaust hole 6 side is made of a material with a large coefficient of thermal expansion, compared to the bolt or stud bolt 4 on the intake hole 5 side. As a specific example, a normal steel bolt or stud bolt 4 having an expansion coefficient of about 11 is used on the intake hole 5 side. On the other hand, for the exhaust hole 6 side, a bolt or stud bolt 4 made of austenitic stainless steel or the like having an expansion coefficient of about 17 to 18 is used.
作用について説明する。 The effect will be explained.
シリンダブロツク１及びシリンダヘツド３は、
エンジン使用中燃焼熱を受ける。シリンダヘツド
３は吸気孔５側は吸気ガスで冷却されるが、排気
孔６側は排気ガスで熱せられて一層高温になる。
そしてシリンダヘツド３が熱膨脹し、ボルト又は
スタツトボルト４も熱膨脹する。排気孔６側はシ
リンダヘツド３の膨脹も大きいが、ボルト又はス
タツドボルト４も膨脹係数の大きいものにしてあ
るので伸びが大きい。このため、ガスケツト２の
シリンダヘツド３の熱膨脹による圧縮を小さくで
き、ガスケツト２の負担が少くなる。従つて使用
不使用を繰返して温度差を繰返してもガスケツト
２のへたりが少く、ガスが吹抜けるようなことに
ならない。 The cylinder block 1 and cylinder head 3 are
The engine receives combustion heat while in use. The cylinder head 3 is cooled on the intake hole 5 side by the intake gas, but the exhaust hole 6 side is heated by the exhaust gas and becomes even hotter.
The cylinder head 3 then thermally expands, and the bolt or stud bolt 4 also thermally expands. On the exhaust hole 6 side, the expansion of the cylinder head 3 is large, but since the bolt or stud bolt 4 is also made of a material with a large expansion coefficient, the expansion is large. Therefore, compression due to thermal expansion of the cylinder head 3 of the gasket 2 can be reduced, and the load on the gasket 2 can be reduced. Therefore, even if the gasket 2 is repeatedly used and not used and temperature differences are repeated, the gasket 2 will not sag so much that gas will not blow through.
以上説明したように、この発明は、シリンダブ
ロツク上面にガスケツトを介してシリンダヘツド
を重ね、周囲を複数のボルト又はスタツドボルト
で締着するものに於て、シリンダヘツドの吸気孔
側のボルト又はスタツドボルトに対し、シリンダ
ヘツドの排気孔側のボルト又はスタツドボルトの
膨脹係数の大きいものにしたので、シリンダヘツ
ドの排気孔側の大きい熱膨脹に対応して、ボルト
又はスタツドボルトも伸び、締付力が均一にでき
て、ガスケツトを片寄つて押圧することがなくな
る。こうして、ガスケツトの負担が軽減できるの
で、温度差を繰返しても、ガスケツトのへたりが
少く、複元性を保つて、ガスが吹抜けるようなこ
とを防ぐことができる。 As explained above, the present invention provides a structure in which the cylinder head is stacked on the upper surface of the cylinder block via a gasket, and the circumference is fastened with a plurality of bolts or stud bolts. Compared to the bolts, the bolts or stud bolts on the exhaust hole side of the cylinder head have a larger expansion coefficient, so the bolts or stud bolts also expand in response to the large thermal expansion on the exhaust hole side of the cylinder head, reducing the tightening force. It can be done evenly, and there is no need to press the gasket unevenly. In this way, the burden on the gasket can be reduced, so even if temperature differences are repeated, the gasket will not sag much, maintaining multiplicity and preventing gas from blowing through.
図は本発明の一実施例を示す縦断面図である。
１……シリンダブロツク、２……ガスケツト、
３……シリンダヘツド、４……ボルト又はスタツ
ドボルト、５……吸気孔、６……排気孔。
The figure is a longitudinal sectional view showing an embodiment of the present invention. 1...Cylinder block, 2...Gasket,
3...Cylinder head, 4...Bolt or stud bolt, 5...Intake hole, 6...Exhaust hole.
Claims (1)
シリンダヘツドを重ね、周囲を複数のボルト又は
スタツドボルトで締着するものに於て、シリンダ
ヘツドの吸気孔側のボルト又はスタツドボルトに
対し、シリンダヘツドの排気孔側のボルト又はス
タツドボルトを膨脹係数の大きいものにしたこと
を特徴とするエンジンのシリンダヘツド締着装
置。1. In a cylinder head stacked on the top surface of the cylinder block via a gasket and secured around the cylinder head with multiple bolts or stud bolts, the exhaust hole of the cylinder head is connected to the bolt or stud bolt on the intake hole side of the cylinder head. A cylinder head fastening device for an engine, characterized in that the side bolt or stud bolt has a large expansion coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8327380A JPS578334A (en) | 1980-06-19 | 1980-06-19 | Cylinder head clamping unit for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8327380A JPS578334A (en) | 1980-06-19 | 1980-06-19 | Cylinder head clamping unit for engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS578334A JPS578334A (en) | 1982-01-16 |
| JPS6214706B2 true JPS6214706B2 (en) | 1987-04-03 |
Family
ID=13797738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8327380A Granted JPS578334A (en) | 1980-06-19 | 1980-06-19 | Cylinder head clamping unit for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS578334A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4631854B2 (en) * | 2007-01-25 | 2011-02-16 | トヨタ自動車株式会社 | engine |
| JP2010090763A (en) * | 2008-10-07 | 2010-04-22 | Mitsubishi Motors Corp | Fastening structure for cylinder head |
-
1980
- 1980-06-19 JP JP8327380A patent/JPS578334A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS578334A (en) | 1982-01-16 |
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