JPH0476950U - - Google Patents
Info
- Publication number
- JPH0476950U JPH0476950U JP11972090U JP11972090U JPH0476950U JP H0476950 U JPH0476950 U JP H0476950U JP 11972090 U JP11972090 U JP 11972090U JP 11972090 U JP11972090 U JP 11972090U JP H0476950 U JPH0476950 U JP H0476950U
- Authority
- JP
- Japan
- Prior art keywords
- exhaust port
- liner
- cylinder head
- modulus
- layer
- 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
- 229910010293 ceramic material Inorganic materials 0.000 claims 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
Description
第１図ないし第４図は本考案の実施例を示し、
第１図は排気ポートライナの斜視図、第２図は第
１図中の矢示−方向断面図、第３図は石こう
型内で外側層を成型している状態を示す縦断面図
、第４図は内側層および外側層を離型させた状態
を示す縦断面図、第５図ないし第８図は従来技術
を示し、第５図は４バルブエンジンの要部縦断面
図、第６図は排気ポートライナの外観図、第７図
は第６図中の矢示−方向断面図、第８図は第
６図中の矢示−方向断面図である。
１……エンジン本体、４……排気ポート、５…
…シリンダヘツド、６……燃焼室、１２……排気
弁、２１……排気ポートライナ、２１Ａ……ポー
ト部、２１Ｂ……二又部、２１Ｃ……合流部、２
２……内側層、２３……外側層。
1 to 4 show embodiments of the present invention,
Figure 1 is a perspective view of the exhaust port liner, Figure 2 is a sectional view in the direction of the arrow in Figure 1, Figure 3 is a longitudinal sectional view showing the outer layer being molded in a plaster mold, FIG. 4 is a longitudinal sectional view showing a state in which the inner layer and outer layer are released from the mold, FIGS. 5 to 8 show the prior art, FIG. 5 is a longitudinal sectional view of the main part of a 4-valve engine, and FIG. 6 7 is a sectional view in the direction of the arrow in FIG. 6, and FIG. 8 is a sectional view in the direction of the arrow in FIG. 6. 1...Engine body, 4...Exhaust port, 5...
... Cylinder head, 6 ... Combustion chamber, 12 ... Exhaust valve, 21 ... Exhaust port liner, 21A ... Port section, 21B ... Forked section, 21C ... Merging section, 2
2...Inner layer, 23...Outer layer.
Claims (1)
シリンダヘツド内に鋳ぐるまれる排気ポートライ
ナであつて、高強度で高ヤング率のセラミツク材
料によつて筒状に形成され、内周側が排気ガスの
流路となつた内側層と、該内側層の外周側を覆い
、低強度で低ヤング率のセラミツク材料によつて
形成された外側層とから２層構造に形成したこと
を特徴とする排気ポートライナ。 The exhaust port liner is cast into the cylinder head to form an exhaust port in the cylinder head, and is formed into a cylindrical shape from a ceramic material with high strength and a high Young's modulus, and the inner circumferential side is the liner for exhaust gas. An exhaust port characterized in that it has a two-layer structure consisting of an inner layer that serves as a flow path, and an outer layer that covers the outer circumferential side of the inner layer and is made of a ceramic material with low strength and a low Young's modulus. Raina.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11972090U JPH0476950U (en) | 1990-11-15 | 1990-11-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11972090U JPH0476950U (en) | 1990-11-15 | 1990-11-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0476950U true JPH0476950U (en) | 1992-07-06 |
Family
ID=31867661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11972090U Pending JPH0476950U (en) | 1990-11-15 | 1990-11-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0476950U (en) |
-
1990
- 1990-11-15 JP JP11972090U patent/JPH0476950U/ja active Pending