JPH0447106A - Valve - Google Patents
ValveInfo
- Publication number
- JPH0447106A JPH0447106A JP15631690A JP15631690A JPH0447106A JP H0447106 A JPH0447106 A JP H0447106A JP 15631690 A JP15631690 A JP 15631690A JP 15631690 A JP15631690 A JP 15631690A JP H0447106 A JPH0447106 A JP H0447106A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- coolant
- metal
- melting point
- valve stem
- 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
- 238000002844 melting Methods 0.000 claims abstract description 13
- 230000008018 melting Effects 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 11
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 11
- 239000002826 coolant Substances 0.000 claims description 32
- 239000006023 eutectic alloy Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000000956 alloy Substances 0.000 abstract description 7
- 229910045601 alloy Inorganic materials 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 5
- 239000002585 base Substances 0.000 abstract 2
- 239000011796 hollow space material Substances 0.000 abstract 2
- 239000000126 substance Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 10
- 229910052708 sodium Inorganic materials 0.000 description 10
- 239000011734 sodium Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 208000018380 Chemical injury Diseases 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 239000013058 crude material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/12—Cooling of valves
- F01L3/14—Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sliding Valves (AREA)
Abstract
Description
（産業上の利用分野）
この発明は、冷却性能に優れたバルブに関するものであ
る。
（従来の技術）
従来１例えば自動・ｌ（用エンジンに使用される吸気バ
ルブおよび排気バルブにおいて、その作動温度は、通常
の場合、吸気バルブで３００〜４５０℃、排気バルブで
４００〜８００℃となっており、作動温度がより高くな
る排気バルブの冷却は弁座を通じて金属接触により行な
われる（［新編自動工学便覧く第４編〉 昭和５８年９
月３０日初版発行の第１−３頁）。
そこで、とくに排気バルブの冷却性能をより向上させて
バルブ傘部表面の最高温度を低下させるために、バルブ
ステム部に冷却材として金属ナトリウムを封入したバル
ブも開発されていた。
第１図はバルブステム部に冷却材を封入したバルブの一
構造を例示するものであって、図に示すバルブ１は、バ
ルブ傘部１ａとバルブステム部１ｂをそなえ、バルブス
テム部１ｂに中空部分ＩＣを設けると共に、前記中空部
分ＩＣに金属ナトリウムよりなる冷却材２を封入した構
造をなすものである。
このような構造をなすバルブ１を製作するに際しては、
オーステナイト系耐熱鋼の棒材を熱間鍛造したバルブ粗
材のバルブステム部１ｂに、ドリル孔をあけることによ
って中空部分ＩＣを形成し、この中空部分１ｃの中に冷
却材２として金属ナトリウムの棒材を入れた後、軸端部
材１ｄを摩擦圧接により接合部Ｆを介して接合すること
によって中空部分１Ｃを塞ぎ、所定の熱処理および機械
加工を施すことによりバルブステム部１ｂの中に金属ナ
トリウムよりなる冷却材２を封入したバルブ１が得られ
るようにしていた。
（発明が解決しようとする課８）
しかしながら、このような従来のバルブ１にあっては、
冷却材２として金属ナトリウムを使用していたため、バ
ルブ１の冷却性能は良好であるものの、バルブ１の製作
時に金属ナトリウムと水分や空気とが反応して発火した
り、水酸化ナトリウムといった強アルカリが生成される
危険性があるという問題点があり、このような問題点を
解決することがＨ題となっていた。
（発明の目的）
この発明は、このような従来の課題にかんがみてなされ
たもので、冷却性能に優れていると共に、冷却材として
金属ナトリウムを用いた場合のようなバルブ製作時にお
ける発火や強アルカリによる危険性がない製造性にもす
ぐれたバルブを提供することを目的としている。(Industrial Application Field) The present invention relates to a valve with excellent cooling performance. (Prior art) Conventional 1 For example, the operating temperature of intake valves and exhaust valves used in automatic engines is usually 300 to 450°C for the intake valve and 400 to 800°C for the exhaust valve. The exhaust valve, whose operating temperature is higher, is cooled by metal contact through the valve seat ([New Automatic Engineering Handbook, Part 4] September 1982
(Pages 1-3, first published on March 30th). Therefore, in order to particularly improve the cooling performance of the exhaust valve and lower the maximum temperature on the surface of the valve head, a valve was also developed in which the valve stem was filled with metallic sodium as a coolant. Fig. 1 shows an example of the structure of a valve in which a coolant is sealed in the valve stem part. It has a structure in which a partial IC is provided and a coolant 2 made of metallic sodium is sealed in the hollow portion IC. When manufacturing the valve 1 having such a structure,
A hollow portion IC is formed by drilling a hole in the valve stem portion 1b of a valve crude material made by hot forging an austenitic heat-resistant steel rod, and a metal sodium rod is placed as a coolant 2 in this hollow portion 1c. After inserting the material, the hollow portion 1C is closed by joining the shaft end member 1d via the joint F by friction welding, and by performing prescribed heat treatment and machining, metallic sodium is added to the valve stem portion 1b. The valve 1 containing the coolant 2 is obtained. (Problem 8 to be solved by the invention) However, in such a conventional valve 1,
Because metallic sodium was used as the coolant 2, the cooling performance of valve 1 was good, but when producing valve 1, metallic sodium reacted with moisture or air and ignited, or strong alkalis such as sodium hydroxide There is a problem that there is a risk of generation, and problem H has been to solve this problem. (Purpose of the Invention) This invention was made in view of the above-mentioned problems in the past, and has excellent cooling performance, and also prevents ignition and strong force during valve manufacturing, such as when metallic sodium is used as a coolant. The purpose is to provide a valve with excellent manufacturability and no danger from alkali.
（課題を解決するための手段）
この発明は、バルブ傘部とバルブステム部をそなえたバ
ルブにおいて、前記バルブステム部に中空部分を設ける
と共に、前記中空部分にアルカリ金属（元素周期表第１
ａ族）を除く低融点かつ高熱伝導度の金属（合金を含む
）よりなる冷却材を封入した構成としたことを特徴とし
ており、実施態様において前記冷却材が、融点＝５００
℃以下、溶融時の熱伝導度：０．ｌｃａ文／ ｃ ｍ・
ｄｅｇ以上、密度：５．０ｇ７０ｍ３以下の共晶合金で
ある構成としたことを特徴としており、このようなバル
ブの構成を前述した従来の課題を解決するための手段と
している。
この発明に係わるバルブは、上記したように、バルブス
テム部に中空部分を設けると共に、前記中空部分にアル
カリ金属（元素周期表第１ａ族）を除く低融点かつ高熱
伝導性の金属（合金を含む）よりなる冷却材を封入した
構成としているが、この場合、アルカリ金属を除くこと
としたのは、先に述べたように、バルブの製作時にアル
カリ金属と水分や空気とが反応して発火したり、水酸化
物といった強アルカリが生成されたりして。
火傷や薬傷の危険性が生ずるため好ましくないことによ
る。
そして、このようなアルカリ金属を除く低融点かつ高熱
伝導性の金属（合金を含む）よりなる冷却材を用いたこ
ととしたのは、冷却材の融点が高すぎるとこの冷却材が
バルブ作動時に溶融しにくくなり、冷却材の円滑なシェ
ーキングが阻害されたり、融解熱によって高温部から熱
を奪う際の効率が著しく低下したりするので好ましくな
く、バルブの作動温度を考慮すると冷却材の融点は５０
０℃以下のものとすることがとくに望ましい。
また、冷却材の熱伝導度が高くないときには十分な冷却
作用が得られなくなるので、高熱伝導度のものとするこ
とが必要であり、バルブの冷却性能を向上させるために
冷却材の溶融時の熱伝導度は０．１ｃａ交／ ｃ ｍ・
ｄｅｇ以上のものとすることがとくに望ましい、この理
由は、熱伝導度が、０．１ｃａＪｌ／ｃｍ＠ｄｅｇ未満
では、バルブ素材の熱伝導との差がなくなり、バルブの
冷却効果が認められなくなるためである。
さらに、冷却材の密度については、バルブ素材の密度よ
りも小さくなければ、バルブの慣性重量が増加するため
、バルブ運動を阻害することとなるので、バルブの慣性
重量を低減させるには冷却材の密度は低い方が望ましく
、５．０ｇ／Ｃｍ’以下のものとすることがとくに望ま
しい。
さらにまた、この発明に係わるバルブでは、バルブステ
ム部に中空部分を設けているが、この場合、バルブステ
ム部にのみ中空部分を設けるという限定的な解釈がなさ
れるべきでなく、中空部分がバルブ傘部にまで及んでい
るものも包含される。
（発明の作用）
この発明に係わるバルブは、上述した構成を有している
ものであるから、バルブの冷却性能が向上したものとな
り、冷却材としてはアルカリ金属を除く低融点かつ高熱
伝導度の金属（合金を含む）よりなるものを用いている
ので、従来のアルカリ金属を用いた場合のようなバルブ
製作時に水分や空気と反応して発火したり、強アルカリ
が生成されたりして、火傷や薬傷の危険性が生じること
がなくなり、バルブ製作の際の安全性も著しく向上した
ものになる。
（実施例）
この発明に係わるバルブは、第１図に例示したものと同
じものにすることが可能であるが、その他必要に応じて
適宜変更できることはいうまでもないところである。
第１図に示すバルブ１は、すでに説明したように、バル
ブ傘部１ａとバルブステム部１ｂをそなえ、バルブステ
ム部１ｂに中空部分ＩＣを設けると共に、前記中空部分
ＩＣにアルカリ金属を除く低融点かつ高熱伝導度の金属
（合金を含む）よりなる冷却材２を封入した構造をなす
ものである。
この実施例において、上記構造のバルブ１を製作するに
あたっては、オーステナイト系耐熱鋼であるＪＩＳ
５ＵＨ３６の棒材を熱間鍛造したバルブ粗材のバルブス
テム部１ｂに、直径３ｍｍ。
長さ５０ｍｍのドリル孔をあけることによって中空部分
ＩＣを形成し、この中空部分ＩＣの中に冷却材２として
第１表の実施例１，２．３に示す共晶合金塊を大気中で
装入した後、所定の位置でバルブ軸端部材１ｄを摩擦圧
接することにより、接合部Ｆを介して接合して中空部分
ＩＣを塞ぎ、中空部分ＩＣの中に冷却材２を封入したバ
ルブ１が得られる。ここで、前記所定の位置とは、エン
ジン稼動時の最高排気温度にバルブ１がさらされた時に
、各々の冷却材２の融点を超えるバルブステム部位置を
示す。
また、比較のために、バルブ１の中空部分ＩＣに、冷却
材２として金属ナトリウムを封入した比較例１のバルブ
と、バルブステム部１ｂが中実であって冷却材を封入し
ない比較例２のバルブとを用意した。
次いで、この発明の実施例１，２．３による３種のバル
ブと、従来の金属ナトリウムを封入した比較例１のバル
ブと、バルブステム部が中実の比較例２のバルブとを２
０００ｃｃ、ＤＯＨＣエンジンの排気側に排気バルブと
して各々組込み、エンジン最高回転数、全開（６５００
ｒｐｍＸ４／４．排気温度＝９３５℃）で１時間運転し
て、各バルブ傘部表面１ｅの最高温度を測足した。
この結果を第１表にまとめて示す。
この結果、この発明の実施例１，２．３におけるバルブ
の冷却効果は、従来の金属ナトリウムを封入した比較例
１のバルブに比べて若干減少するものの、比較例２の中
実バルブに比べれば著しい冷却効果が認められた。
そして、実施例２のごとく冷却材としてＭｇ３０原子％
ＡＭを封入したバルブでは、冷却材の密度が２．０５ｇ
／ｃｍ３であって、実施例１の冷却材であるＭｇ−３０
原子％Ｇｅの密度４．０１ ｇ／ｃｍ３．および実施例
３の冷却材であるＭｇ−２６ｉ子％Ｚｎｖ）密度４．４
４ｇ／Ｃｍ’に比べて半分近くも軽量であるため、バル
ブ運動へのはね返りが小さいものとなるという好結果が
得られた。(Means for Solving the Problems) The present invention provides a valve having a valve head portion and a valve stem portion, in which the valve stem portion is provided with a hollow portion, and the hollow portion is filled with an alkali metal (No.
It is characterized by a structure in which a coolant made of a metal (including alloy) with a low melting point and high thermal conductivity other than those of group A) is sealed, and in an embodiment, the coolant has a melting point of 500
℃ or less, thermal conductivity when melted: 0. lca sentence/c m・
The bulb is characterized by being made of a eutectic alloy with a density of 5.0 g or more and a density of 5.0 g or less than 70 m3, and this valve structure is a means for solving the above-mentioned conventional problems. As described above, the valve according to the present invention includes a hollow portion in the valve stem portion, and a metal having a low melting point and high thermal conductivity (including alloys) other than alkali metals (group 1a of the periodic table of elements). ), but in this case, we decided to exclude the alkali metal because, as mentioned earlier, the alkali metal reacts with moisture or air during the manufacture of the valve to avoid ignition. or strong alkalis such as hydroxides are produced. This is because it is undesirable due to the risk of burns and chemical injuries. We decided to use a coolant made of metals (including alloys) with a low melting point and high thermal conductivity, excluding alkali metals, because if the melting point of the coolant is too high, the coolant will leak when the valve is activated. This is undesirable because it becomes difficult to melt, hinders the smooth shaking of the coolant, and significantly reduces the efficiency of removing heat from high-temperature parts due to the heat of fusion. Considering the operating temperature of the valve, the melting point of the coolant is 50
It is particularly desirable that the temperature be below 0°C. In addition, if the coolant does not have high thermal conductivity, sufficient cooling effect cannot be obtained, so it is necessary to use a coolant with high thermal conductivity. Thermal conductivity is 0.1 ca/cm・
The reason for this is that if the thermal conductivity is less than 0.1 caJl/cm@deg, there will be no difference between the thermal conductivity of the valve material and the cooling effect of the valve will not be recognized. It is. Furthermore, if the density of the coolant is not lower than the density of the valve material, the inertial weight of the valve will increase, which will impede the valve movement. It is desirable that the density is low, and it is particularly desirable that the density be 5.0 g/Cm' or less. Furthermore, in the valve according to the present invention, the hollow portion is provided in the valve stem portion, but in this case, the hollow portion should not be interpreted to be limited to providing the hollow portion only in the valve stem portion; It also includes those that extend to the umbrella part. (Operation of the invention) Since the valve according to the present invention has the above-mentioned configuration, the cooling performance of the valve is improved, and the coolant is a material with a low melting point and high thermal conductivity other than alkali metals. Because the valve is made of metal (including alloys), it may react with moisture or air during the manufacturing process and cause a fire or generate strong alkali, which can cause burns. There is no risk of burns or chemical injuries, and safety during valve manufacturing is significantly improved. (Example) The valve according to the present invention can be the same as the one illustrated in FIG. 1, but it goes without saying that other changes can be made as appropriate. As already explained, the valve 1 shown in FIG. 1 includes the valve head part 1a and the valve stem part 1b, and the hollow part IC is provided in the valve stem part 1b. It also has a structure in which a coolant 2 made of a metal (including alloy) with high thermal conductivity is enclosed. In this embodiment, in manufacturing the valve 1 having the above structure, JIS steel, which is an austenitic heat-resistant steel, is used.
The valve stem portion 1b is made from a hot forged 5UH36 bar and has a diameter of 3 mm. A hollow portion IC was formed by drilling a drill hole with a length of 50 mm, and a eutectic alloy ingot shown in Examples 1 and 2.3 of Table 1 was placed in the hollow portion IC as the coolant 2 in the atmosphere. After the valve is inserted, the valve shaft end member 1d is friction welded at a predetermined position to join through the joint F and close the hollow part IC, and the valve 1 with the coolant 2 sealed in the hollow part IC is formed. can get. Here, the predetermined position refers to the position of the valve stem portion where the melting point of each coolant 2 exceeds the temperature when the valve 1 is exposed to the maximum exhaust temperature during engine operation. For comparison, a valve of Comparative Example 1 in which metallic sodium was sealed as the coolant 2 in the hollow IC of the valve 1, and a valve of Comparative Example 2 in which the valve stem portion 1b was solid and no coolant was sealed. A valve was prepared. Next, three types of valves according to Examples 1, 2, and 3 of the present invention, the valve of Comparative Example 1 in which conventional metal sodium was sealed, and the valve of Comparative Example 2 in which the valve stem portion was solid were tested.
000cc, each installed as an exhaust valve on the exhaust side of the DOHC engine, maximum engine speed, fully open (6500
rpmX4/4. After operating for 1 hour at an exhaust temperature of 935° C., the maximum temperature of the surface 1e of each valve head was measured. The results are summarized in Table 1. As a result, although the cooling effect of the valves in Examples 1, 2, and 3 of the present invention is slightly reduced compared to the conventional valve of Comparative Example 1, which is filled with metallic sodium, it is still lower than that of the solid valve of Comparative Example 2. A significant cooling effect was observed. Then, as in Example 2, 30 atomic % of Mg was used as a coolant.
In a valve containing AM, the density of the coolant is 2.05g.
/cm3, Mg-30 which is the coolant of Example 1
Atomic %Ge density 4.01 g/cm3. and the coolant of Example 3 Mg-26i% Znv) density 4.4
Since it is nearly half as light as 4g/Cm', good results were obtained in that the rebound caused by valve movement was small.
この発明に係わるバルブでは、バルブステム部に中空部
分を設けると共に、前記中空部分に金属ナトリウム等の
アルカリ金属を除く低融点かつ高熱伝導度の金属（合金
を含む）よりなる冷却材を封入した構成としたから、バ
ルブの冷却性能に優れていると共に、／ヘルプの製作時
に水分や空気との反応による発火や強アルカリによる火
傷や薬傷の危険性がなくなり、バルブの製造性も向上し
たものになるという著しく優れた効果がもたらされる。In the valve according to the present invention, a hollow portion is provided in the valve stem portion, and a coolant made of a metal (including alloy) having a low melting point and high thermal conductivity excluding alkali metals such as sodium metal is sealed in the hollow portion. As a result, the cooling performance of the valve is excellent, and the risk of ignition due to reaction with moisture or air, burns and chemical injuries due to strong alkali during the production of /help has been eliminated, and the manufacturability of the valve has also been improved. This brings about an extremely excellent effect.
第１図はこの発明が適用されるバルブの構造を例示する
概略説明図である。
１・・・バルブ、１ａ・・・バルブ傘部、１ｂ・・・バ
ルブステム部、ＩＣ・・・中空部分、２・・・冷却材。FIG. 1 is a schematic explanatory diagram illustrating the structure of a valve to which the present invention is applied. DESCRIPTION OF SYMBOLS 1... Valve, 1a... Valve head part, 1b... Valve stem part, IC... Hollow part, 2... Coolant.
Claims (2)
おいて、前記バルブステム部に中空部分を設けると共に
、前記中空部分にアルカリ金属を除く低融点かつ高熱伝
導度の金属よりなる冷却材を封入したことを特徴とする
バルブ。(1) In a valve having a valve head part and a valve stem part, a hollow part is provided in the valve stem part, and a coolant made of a metal with a low melting point and high thermal conductivity other than an alkali metal is sealed in the hollow part. A valve characterized by:
度：０．１ｃａｌ／ｃｍ・ｄｅｇ以上、密度：５．０ｇ
／ｃｍ＾３以下の共晶合金である請求項第１項に記載の
バルブ。(2) The coolant has a melting point of 500°C or lower, a thermal conductivity of 0.1 cal/cm・deg or higher, and a density of 5.0 g.
The valve according to claim 1, which is a eutectic alloy of less than /cm^3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15631690A JPH0447106A (en) | 1990-06-14 | 1990-06-14 | Valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15631690A JPH0447106A (en) | 1990-06-14 | 1990-06-14 | Valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0447106A true JPH0447106A (en) | 1992-02-17 |
Family
ID=15625138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15631690A Pending JPH0447106A (en) | 1990-06-14 | 1990-06-14 | Valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0447106A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5769037A (en) * | 1995-12-28 | 1998-06-23 | Fuji Oozx, Inc. | Hollow valve in an internal combustion engine |
| CN1091212C (en) * | 1997-01-29 | 2002-09-18 | 富士乌兹克斯株式会社 | Hollow valve in internal combustion engine |
| JP2008128047A (en) * | 2006-11-17 | 2008-06-05 | Mitsubishi Motors Corp | Exhaust gas purification device |
| WO2016031455A1 (en) * | 2014-08-27 | 2016-03-03 | 三菱重工業株式会社 | Hollow engine valve and manufacturing method therefor |
| JP2016148257A (en) * | 2015-02-10 | 2016-08-18 | 本田技研工業株式会社 | Engine valve |
-
1990
- 1990-06-14 JP JP15631690A patent/JPH0447106A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5769037A (en) * | 1995-12-28 | 1998-06-23 | Fuji Oozx, Inc. | Hollow valve in an internal combustion engine |
| EP0855495A1 (en) * | 1995-12-28 | 1998-07-29 | Fuji Oozx Inc. | Hollow valve in an internal combustion engine |
| CN1091212C (en) * | 1997-01-29 | 2002-09-18 | 富士乌兹克斯株式会社 | Hollow valve in internal combustion engine |
| JP2008128047A (en) * | 2006-11-17 | 2008-06-05 | Mitsubishi Motors Corp | Exhaust gas purification device |
| JP4696288B2 (en) * | 2006-11-17 | 2011-06-08 | 三菱自動車工業株式会社 | Exhaust purification device |
| WO2016031455A1 (en) * | 2014-08-27 | 2016-03-03 | 三菱重工業株式会社 | Hollow engine valve and manufacturing method therefor |
| JP2016047537A (en) * | 2014-08-27 | 2016-04-07 | 三菱重工業株式会社 | Hollow engine valve and method for manufacturing the same |
| US10526933B2 (en) | 2014-08-27 | 2020-01-07 | Fuji Hollow Valve Inc. | Hollow engine valve and manufacturing method therefor |
| US11215091B2 (en) | 2014-08-27 | 2022-01-04 | Fuji Hollow Valve Inc. | Hollow engine valve and manufacturing method therefor |
| JP2016148257A (en) * | 2015-02-10 | 2016-08-18 | 本田技研工業株式会社 | Engine valve |
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