JPH03260309A - Fluid cooling valve for internal combustion engine - Google Patents
Fluid cooling valve for internal combustion engineInfo
- Publication number
- JPH03260309A JPH03260309A JP5670490A JP5670490A JPH03260309A JP H03260309 A JPH03260309 A JP H03260309A JP 5670490 A JP5670490 A JP 5670490A JP 5670490 A JP5670490 A JP 5670490A JP H03260309 A JPH03260309 A JP H03260309A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- heat transmission
- internal combustion
- combustion engine
- heat transfer
- 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.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 19
- 239000012530 fluid Substances 0.000 title claims abstract description 18
- 238000001816 cooling Methods 0.000 title claims abstract description 15
- 230000005484 gravity Effects 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 239000011796 hollow space material Substances 0.000 abstract 6
- 238000013019 agitation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 6
- 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 3
- 230000000694 effects Effects 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、内燃機関の吸排気弁として用いられるきのこ
状のポペット弁であって、内部に形成した中空部内に、
内燃機関の作動時の温度で流体となる所要量の熱伝達媒
体を封入したものに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a mushroom-shaped poppet valve used as an intake and exhaust valve for an internal combustion engine.
It is concerned with enclosing a required amount of heat transfer medium that becomes a fluid at the operating temperature of the internal combustion engine.
この種の流体冷却弁において、内燃機関の作動熱を受け
る弁頭部から弁ステム部への熱伝達効率を高めうるよう
にしたものとしては、例えば特開昭５３−２２９３０号
公報に開示されているように、中空部の内面に長手方向
を向く複数の溝を刻設したものがある。A fluid cooling valve of this type that can increase the efficiency of heat transfer from the valve head to the valve stem, which receives the operating heat of the internal combustion engine, is disclosed in, for example, Japanese Patent Laid-Open No. 53-22930. Some have a plurality of grooves oriented in the longitudinal direction carved into the inner surface of the hollow part.
また、特開昭５８−１８５９１７号公報に開示されてい
るように、中空部の上部に、熱伝達媒体の下降を抑制す
る金網等登設けたものもある。Furthermore, as disclosed in Japanese Patent Application Laid-Open No. 58-185917, there is also a structure in which a wire mesh or the like is provided in the upper part of the hollow part to suppress the descent of the heat transfer medium.
近年、自動車用エンジンの性能向上に伴い、エンジンの
熱負荷が大となり、弁への入熱が大となる傾向にある。In recent years, as the performance of automobile engines has improved, the thermal load on the engine has increased, and the heat input to the valves has tended to increase.
一方、動弁系の軽量化の要求を満足させるため、弁の軸
部の外径は、小さくされる傾向にあり、それに伴って、
軸部内に形成される中空部の孔の内径も、小さくせざる
を得ない状況にある。On the other hand, in order to satisfy the demand for lighter weight valve train systems, the outer diameter of valve shafts tends to be smaller.
There is also a situation where the inner diameter of the hole in the hollow part formed in the shaft part has to be made smaller.
このように、中空部の内径をかとすると、熱伝達媒体の
移動が阻害され、弁頭部から尖細部への熱伝達効率が著
しく低下するおそれがある。As described above, if the inner diameter of the hollow portion is increased, the movement of the heat transfer medium may be inhibited, and the efficiency of heat transfer from the valve head to the leaflet portion may be significantly reduced.
このような状況下において、上述のような従来の熱伝達
効率を向上させるための手段を設けたとしても、中空部
内に設けた溝や金網等内に熱伝達媒体が滞留し易く、そ
の部分の熱伝達媒体の流動性や攪拌作用が阻害され、却
って熱伝達効率の向上に妨げとなるおそれがある。Under such circumstances, even if conventional means for improving heat transfer efficiency as described above are provided, the heat transfer medium tends to remain in the grooves, wire mesh, etc. provided in the hollow part, and The fluidity and stirring action of the heat transfer medium may be inhibited, which may actually hinder the improvement of heat transfer efficiency.
本発明は、このような従来の技術が有する問題点に鑑み
、熱伝達媒体の攪拌性能や流動性を高めることにより、
結果的に弁頭部から弁ステム部への熱伝達効率を向上し
つるようにした、内燃機関用流体冷却弁を提供すること
を第１の目的としている。In view of the problems of the conventional technology, the present invention aims to improve the stirring performance and fluidity of the heat transfer medium.
A first object of the present invention is to provide a fluid-cooled valve for an internal combustion engine that improves the efficiency of heat transfer from the valve head to the valve stem.
また、本発明は、中空部内に設ける攪拌部材にゲッター
作用を持たせることにより、中空部内に存在する有害物
質を、これに吸着させることができるようにした、内燃
機関用流体冷却弁を提供することを第２の目的としてい
る。Further, the present invention provides a fluid cooling valve for an internal combustion engine, in which a stirring member provided in the hollow part has a getter action, thereby making it possible to adsorb harmful substances present in the hollow part. This is the second purpose.
上記第１の目的を達成するため、本発明の内燃機関用流
体冷却弁は、内部に中空部（４）を設け、この中空部（
４）内に内燃機関の作動時の温度で流体となる所要量の
熱伝達媒体（５）登封入してなる内燃機関用流体冷却弁
（１）において、前記中空部（４）内に熱伝達媒体（５
）より比重が大きく、かつ中空部（４）内を自由に遊動
しうる程度の大きさとした攪拌部材（７）を設けたこと
を特徴としている。In order to achieve the above-mentioned first object, the fluid cooling valve for an internal combustion engine of the present invention has a hollow part (4) inside, and this hollow part (
4) In a fluid cooling valve for an internal combustion engine (1), which has a required amount of a heat transfer medium (5) that becomes a fluid at the operating temperature of the internal combustion engine sealed therein, heat is generated in the hollow part (4). Transmission medium (5
), and is characterized by the provision of a stirring member (7) which has a larger specific gravity and is sized to be able to freely move within the hollow portion (4).
上記第１及び第２の両方の目的を同時に達成するために
は、上記攪拌部材（７）の少なくとも表面の一部を、ゲ
ッター作用を有する材料により構成する。In order to simultaneously achieve both the first and second objects, at least a portion of the surface of the stirring member (7) is made of a material having a getter action.
内燃機関の作動時に、流体冷却弁（１）が上下に撮動さ
せられることにより、その中空部（４）内に設けた攪拌
部材（７）は、同じ中空部（４）内の熱伝達媒体（５）
より比重が大きいので、熱伝達媒体（５）に先立って激
しく上下動し、それによって、熱伝達媒体（５）の移動
が促進させられるとともに、熱伝達媒体（５）の攪拌性
能が向上し、高温の弁頭部（２）の熱を低温の弁ステム
部（３）へ速やかに移動させることが可能となり１局部
的な昇温による弁の強度の低下は防止される。When the internal combustion engine is operated, the fluid cooling valve (1) is moved up and down, so that the stirring member (7) provided in the hollow part (4) stirs the heat transfer medium in the same hollow part (4). (5)
Since it has a higher specific gravity, it moves up and down violently before the heat transfer medium (5), thereby promoting the movement of the heat transfer medium (5) and improving the stirring performance of the heat transfer medium (5). It is possible to quickly transfer the heat from the high-temperature valve head (2) to the low-temperature valve stem (3), thereby preventing a decrease in the strength of the valve due to a local temperature rise.
攪拌部材（７）の少なくとも表面の一部を、ゲッター作
用を有する材料により構成すると、中空部（４）内に混
入した有害物質が、攪拌部材（７）の表面に吸着され、
有害物質と熱伝達媒体（５）とが反応して、熱伝達を阻
害する二次生成物が生成されたり、中空部（４）内の内
圧を異常に上昇させるガスが発生したりするのを、未然
に防止することができる。When at least a part of the surface of the stirring member (7) is made of a material having a getter action, harmful substances mixed in the hollow part (4) are adsorbed on the surface of the stirring member (7),
Prevents the reaction between harmful substances and the heat transfer medium (5), resulting in the generation of secondary products that inhibit heat transfer or the generation of gas that abnormally increases the internal pressure within the hollow portion (4). , can be prevented.
以下、本発明の一実施例を、添付図面を参照して説明す
る。Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.
（１）は、内燃機関用吸排気弁として用いる流体冷却弁
で、傘状に拡径した弁頭部（２）と、それになだらかに
連続する小径の弁ステム部（３）とがらなり、弁頭部（
２）から弁ステム部（３）の先端近傍までの中心軸線上
には、中空部（４）が形成されている。(1) is a fluid-cooled valve used as an intake and exhaust valve for internal combustion engines.It consists of a valve head (2) with an enlarged diameter in the shape of an umbrella, and a small-diameter valve stem (3) that gently continues to the valve head (2). Department (
A hollow portion (4) is formed on the central axis from 2) to near the tip of the valve stem portion (3).
中空部（４）内には、その容積のほぼ３分の２程度の容
積を占める熱伝達媒体（５）と、残りの容積を占めると
ともに、弁作動温度範囲において熱伝達媒体（５）と反
応しにくい気体（６）とが密封されている。Inside the hollow part (4), there is a heat transfer medium (5) which occupies approximately two-thirds of its volume, and a heat transfer medium (5) which occupies the remaining volume and reacts with the heat transfer medium (5) in the valve operating temperature range. The gas (6) that is difficult to evaporate is sealed.
熱伝達媒体（５）は、内燃機関の弁作動温度（１００℃
〜８００℃）で流体となる、例えば金属ナトリウム又は
その他の冷却材とするのがよい。The heat transfer medium (5) has a valve operating temperature of an internal combustion engine (100°C
The coolant may be, for example, metallic sodium or other coolant that is a fluid at temperatures between 800° C. and 800° C.
熱伝達媒体（５）を金属ナトリウムとしたときは、気体
（６）は、例えば窒素ガス、若しくはヘリウムガス、ア
ルゴンガス等の狭義の不活性ガス、又はフロンガス等と
するのがよい。When the heat transfer medium (5) is metallic sodium, the gas (6) is preferably, for example, nitrogen gas, an inert gas in a narrow sense such as helium gas or argon gas, or fluorocarbon gas.
しかし、気体（６）の部分を真空としたり、もしくは空
気としたり、又は中空部（４）内金体に気体の熱伝達媒
体のみを封入したりしてもよい。However, the gas (6) portion may be evacuated or filled with air, or only a gaseous heat transfer medium may be sealed in the inner metal body of the hollow portion (4).
中空部（４）内には、熱伝達媒体（５）より比重が大き
く、かつ中空部（４）内を自由に遊動しうる程度の大き
さとした攪拌部材（７）が設けられている。A stirring member (7) having a specific gravity greater than that of the heat transfer medium (5) and having a size such that it can freely move within the hollow portion (4) is provided within the hollow portion (4).
攪拌部材（７）の具体的な形状は、中空部（４）の内径
より小径とした球状、表面に適宜の凹凸を形成した概ね
球状のもの、又は小石のように、不定形の塊状等とする
のが好ましいが、直径を、中空部（４）の内径より小と
し、かつ長さを、中空部（４）の内径より大とした円柱
状その他の形状とすることもできる。The specific shape of the stirring member (7) may be spherical with a diameter smaller than the inner diameter of the hollow portion (4), approximately spherical with appropriate unevenness formed on the surface, or irregularly shaped block like a pebble. Although it is preferable to have a cylindrical shape having a diameter smaller than the inner diameter of the hollow part (4) and a length larger than the inner diameter of the hollow part (4), it can also be made into a cylindrical shape or other shape.
攪拌部材（７）の材質は、中空部（４）内の有害な分子
を吸着するゲッター作用を有するものが好ましく、具体
的には、チタン又はジルコニウムとするのがよい、しか
し、ゲッター作用を有する材料として、バナジウム、ハ
フニウム、イツトリウム等、及び以上のゲッター材料の
混合物を用いることもできる。The material of the stirring member (7) is preferably one that has a getter effect to adsorb harmful molecules in the hollow portion (4), and specifically titanium or zirconium is preferable, but the material has a getter effect. As materials vanadium, hafnium, yttrium, etc. and mixtures of these getter materials can also be used.
また、攪拌部材（７）の少なくとも表面の一部を。Also, at least a part of the surface of the stirring member (7).
上記のようなゲッター作用を有する材料により構成して
もよい。It may be made of a material having a getter action as described above.
さらに、ゲッター作用を必要としない場合、又は別の手
段にゲッター作用を持たせた場合は、攪拌部材（７）の
材料として、ゲッター作用を有しない、錆その他の金属
を用いてもよい。Furthermore, if the getter action is not required, or if another means is provided with the getter action, rust or other metals that do not have the getter action may be used as the material for the stirring member (7).
中空部（４）内に設ける攪拌部材（７）の数は、１個又
は２，３個が好ましいが、それ以上としてもよい。The number of stirring members (7) provided in the hollow portion (4) is preferably one, two or three, but may be more than that.
（８）は、内燃機関の吸気口又は排気口の開口縁部に設
けられた弁座、（９）は、ナトリウム冷却弁（１）の弁
ステム部（３）の軸線方向の往復移動を案内する弁ガイ
ドである。(8) is a valve seat provided at the opening edge of the intake or exhaust port of the internal combustion engine, and (9) is for guiding the reciprocating movement of the valve stem (3) of the sodium cooling valve (1) in the axial direction. This is a valve guide.
この実施例のような構成とすると、内燃機関の作動に伴
い、流体冷却弁（１）が勘弁機構（図示略）により上下
動させられたとき、中空部（４）内に設けた攪拌部材（
７）は、同じ中空部（４）内の熱伝達媒体（５）より比
重が大きいので、熱伝達媒体（５）に先立って激しく上
下動する。それによって、熱伝達媒体（５）の移動が促
進させられるとともに、熱伝達媒体（５）の攪拌性能は
向上し、高温の弁頭部（２）の熱を低温の弁ステム部（
３）へ速やかに移動させ、そこから弁ガイド（９）を通
じて迅速に放散させることが可能となり、局部的な昇温
による弁の強度の低下は防止される。With the configuration of this embodiment, when the fluid cooling valve (1) is moved up and down by the stop valve mechanism (not shown) with the operation of the internal combustion engine, the stirring member (
7) has a higher specific gravity than the heat transfer medium (5) in the same hollow part (4), so it moves up and down violently before the heat transfer medium (5). As a result, the movement of the heat transfer medium (5) is promoted, the stirring performance of the heat transfer medium (5) is improved, and the heat of the high temperature valve head (2) is transferred to the low temperature valve stem portion (2).
3) and from there through the valve guide (9), it is possible to prevent the strength of the valve from decreasing due to local temperature rise.
攪拌部材（７）の少なくとも表面の一部を、ゲッター作
用を有する材料により構成すると、中空部（４）内に混
入した有害物質は、攪拌部材（７）の表面に吸着され、
有害物質と熱伝達媒体（５）とが反応して、熱伝達を阻
害する二次生成物が生成したり、中空部（４）内の内圧
を異常に上昇させるガスが発生したりするのが、未然に
防止される。When at least a part of the surface of the stirring member (7) is made of a material having a getter action, harmful substances mixed into the hollow part (4) are adsorbed on the surface of the stirring member (7).
Hazardous substances may react with the heat transfer medium (5) to generate secondary products that inhibit heat transfer or generate gas that abnormally increases the internal pressure within the hollow portion (4). , will be prevented.
本発明によると、中空部（４）内に攪拌部材（７）を入
れるという簡単な構成で、弁作動時における熱伝達媒体
（５）の移動を促進するとともに、熱伝達媒体（５）の
攪拌性能を高め、もって、弁頭部（２）から弁ステム部
（３）への熱伝達効率を向上させることができる（Ｍ求
項（１）及び（２）記載の発明）。According to the present invention, the simple structure of placing the stirring member (7) in the hollow part (4) promotes the movement of the heat transfer medium (5) when the valve is operated, and also stirs the heat transfer medium (5). It is possible to improve the performance, thereby improving the heat transfer efficiency from the valve head (2) to the valve stem (3) (invention described in M terms (1) and (2)).
また、攪拌部材（７）の少なくとも表面の一部を、ゲッ
ター作用を有する材料により構成すると、中空部（４）
内に混入した有害物質が、攪拌部材（７）の表面に吸着
され、有害物質と熱伝達媒体（５）とが反応して、熱伝
達を阻害する二次生成物が生成されたり、中空部（４）
内の内圧を異常に上昇させるガスが発生したりするのが
未然に防止される（請求項（２）記載の発明）。Moreover, when at least a part of the surface of the stirring member (7) is made of a material having a getter action, the hollow part (4)
Harmful substances mixed in the interior of the stirrer (7) may be adsorbed on the surface of the stirring member (7), and the harmful substances and the heat transfer medium (5) may react to generate secondary products that inhibit heat transfer or cause damage to the hollow part. (4)
This prevents the generation of gas that would abnormally increase the internal pressure within the device (invention as claimed in claim (2)).
図面は、本発明の一実施例の縦断正面図である。 （１）流体冷却弁 （３）弁ステム部 （４ａ）突条 （６）気体 （８）弁座 （２）弁頭部 （４）中空部 （５）熱伝達媒体 （７）攪拌部材 （９）弁ガイド The drawing is a longitudinal sectional front view of one embodiment of the present invention. (1) Fluid cooling valve (3) Valve stem part (4a) Projection (6) Gas (8) Valve seat (2) Valve head (4) Hollow part (5) Heat transfer medium (7) Stirring member (9) Valve guide
Claims (2)
動時の温度で流体となる所要量の熱伝達媒体を封入して
なる内燃機関用流体冷却弁において、前記中空部内に熱
伝達媒体より比重が大きく、かつ中空部内を自由に遊動
しうる程度の大きさとした攪拌部材を設けたことを特徴
とする内燃機関用流体冷却弁。(1) In a fluid cooling valve for an internal combustion engine, which has a hollow part inside and seals in the hollow part a required amount of heat transfer medium that becomes a fluid at the operating temperature of the internal combustion engine, in which heat is transferred into the hollow part. 1. A fluid cooling valve for an internal combustion engine, comprising a stirring member that has a specific gravity greater than that of a medium and is large enough to freely move within a hollow portion.
用を有する材料により構成したことを特徴とする請求項
（１）記載の内燃機関用流体冷却弁。(2) The fluid cooling valve for an internal combustion engine according to claim (1), wherein at least a part of the surface of the stirring member is made of a material having a getter action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5670490A JP2711301B2 (en) | 1990-03-09 | 1990-03-09 | Fluid cooling valve for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5670490A JP2711301B2 (en) | 1990-03-09 | 1990-03-09 | Fluid cooling valve for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03260309A true JPH03260309A (en) | 1991-11-20 |
| JP2711301B2 JP2711301B2 (en) | 1998-02-10 |
Family
ID=13034860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5670490A Expired - Lifetime JP2711301B2 (en) | 1990-03-09 | 1990-03-09 | Fluid cooling valve for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2711301B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107532486A (en) * | 2015-04-28 | 2018-01-02 | 富士特殊气门有限公司 | Enclose the manufacture method and its device of metallic sodium engine valve |
| WO2022158181A1 (en) * | 2021-01-25 | 2022-07-28 | フジオーゼックス株式会社 | Hollow engine valve |
| WO2024088562A1 (en) * | 2022-10-25 | 2024-05-02 | Eaton Intelligent Power Limited | Systems and methods for engine valve cooling |
-
1990
- 1990-03-09 JP JP5670490A patent/JP2711301B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107532486A (en) * | 2015-04-28 | 2018-01-02 | 富士特殊气门有限公司 | Enclose the manufacture method and its device of metallic sodium engine valve |
| EP3290664A4 (en) * | 2015-04-28 | 2019-01-02 | Fuji Hollow Valve Inc. | Method and device for manufacturing metallic-sodium-filled engine valve |
| US10677110B2 (en) | 2015-04-28 | 2020-06-09 | Fuji Hollow Valve Inc. | Method and device for manufacturing metallic-sodium-filled engine valve |
| WO2022158181A1 (en) * | 2021-01-25 | 2022-07-28 | フジオーゼックス株式会社 | Hollow engine valve |
| WO2024088562A1 (en) * | 2022-10-25 | 2024-05-02 | Eaton Intelligent Power Limited | Systems and methods for engine valve cooling |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2711301B2 (en) | 1998-02-10 |
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