JPH0117606Y2 - - Google Patents
Info
- Publication number
- JPH0117606Y2 JPH0117606Y2 JP1983179061U JP17906183U JPH0117606Y2 JP H0117606 Y2 JPH0117606 Y2 JP H0117606Y2 JP 1983179061 U JP1983179061 U JP 1983179061U JP 17906183 U JP17906183 U JP 17906183U JP H0117606 Y2 JPH0117606 Y2 JP H0117606Y2
- Authority
- JP
- Japan
- Prior art keywords
- space
- umbrella
- valve
- bottomed holes
- exhaust valve
- 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
- 239000012530 fluid Substances 0.000 claims description 23
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 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 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Lift Valve (AREA)
- Temperature-Responsive Valves (AREA)
- Details Of Valves (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
【考案の詳細な説明】
本考案は、デイーゼル機関や火花点火式内燃機
関などのような内燃機関に用いられいる排気弁装
置に関する。[Detailed Description of the Invention] The present invention relates to an exhaust valve device used in an internal combustion engine such as a diesel engine or a spark-ignition internal combustion engine.
典型的な先行技術は、第１図に示されている。
内燃機関のシリンダーヘツド１には排気弁２が設
けられる。この排気弁２は、傘部３と弁軸４とを
含む。排気弁２の頂部５は、ピストンと同期して
作動する下部機構によつてばね６に抗して第１図
の下方に変位され、これによつて傘部３は燃焼室
内に入り込み開弁状態となる。排気弁２内には、
空間７が形成されている。この空間７には、内燃
機関の運転中に気体となることができる作動液８
が部分的に封入される。傘部３において、作動液
８が加熱されて気化し、弁軸４内を上昇して凝縮
し、この凝縮した作動液は空間７の内壁に沿つて
下降する。このようにして作動液の潜熱を利用し
て排気弁２が冷却される。そのため弁座９の内周
面に接触するシール面１０の寿命が延ばされると
ともに、低質重油に含まれているバナジユウムに
よつて侵食されるいわゆるバナジウムアタツク現
象が防がれる。 A typical prior art is shown in FIG.
An exhaust valve 2 is provided in a cylinder head 1 of an internal combustion engine. This exhaust valve 2 includes an umbrella portion 3 and a valve shaft 4. The top portion 5 of the exhaust valve 2 is displaced downward in FIG. 1 against the spring 6 by a lower mechanism operating in synchronization with the piston, thereby causing the umbrella portion 3 to enter the combustion chamber and open the valve. becomes. Inside the exhaust valve 2,
A space 7 is formed. This space 7 contains a working fluid 8 which can become a gas during operation of the internal combustion engine.
is partially encapsulated. In the umbrella portion 3, the hydraulic fluid 8 is heated and vaporized, rises within the valve shaft 4 and condenses, and this condensed hydraulic fluid descends along the inner wall of the space 7. In this way, the exhaust valve 2 is cooled using the latent heat of the hydraulic fluid. Therefore, the life of the sealing surface 10 that contacts the inner circumferential surface of the valve seat 9 is extended, and the so-called vanadium attack phenomenon, which is caused by vanadium contained in low-quality heavy oil, is prevented.
このような先行技術では、傘部３付近が充分に
冷却されず、したがつてさらに冷却効果の優れた
排気弁が望まれる。 In such prior art, the vicinity of the umbrella portion 3 is not sufficiently cooled, and therefore, an exhaust valve with even better cooling effect is desired.
本考案の目的は、排気弁の傘部の冷却を充分に
行うことができるようにした内燃機関の排気弁装
置を提供することである。 SUMMARY OF THE INVENTION An object of the present invention is to provide an exhaust valve device for an internal combustion engine that can sufficiently cool the head portion of the exhaust valve.
本考案は、傘部１７と、その傘部１７に固定さ
れる弁軸１８とを有する弁体１６を、ブツシユ１
９によつて案内する内燃機関の排気弁装置におい
て、
傘部１７に下方に拡つた第１空間１４を形成
し、
弁軸１８には、第１空間２４に連なりブツシユ
１９によつて案内される部分にわたつて延びる第
２空間２５を形成し、
第１空間２４の底部に、作動液２６を封入し、
傘部１７のシール面２３よりも上方位置で、傘
部１７と弁軸１８とが固定され、
傘部１７には、第１空間２４に連なり斜め下方
に放射状に延びる有底孔２７，２８が周方向に間
隔をあけて形成され、
前記有底孔２７，２８の軸線の延長線は、第１
空間２４の開口端内にあり、
有底孔２７，２８の上端部は作動液２６の液面
よりも下方にあることを特徴とする内燃機関の排
気弁装置であるる
第２図は本考案の一実施例の断面図である。デ
イーゼル機関または火花点火式内燃機関などのシ
リンダーヘツド１１には、弁箱１２が固定され
る。この弁箱１２には、冷却液が通過する冷却液
通路１３，１４，１５が形成される。排気弁１６
は基本的には、傘部１７と弁軸１８とを含み、弁
箱１２に固定されたブツシユ１９によつて第２図
の上下に案内される。排気弁１６の頂部２０はピ
ストンに同期して作動するカム機構によつて、ば
ね２１のばね力に抗して第２図の下方に変位され
る。これによつて弁箱１２に形成されている弁座
２２の内周面から傘部１７のシール面２３が離間
し、開弁状態となる。 In the present invention, a valve body 16 having an umbrella part 17 and a valve shaft 18 fixed to the umbrella part 17 is attached to a bush 1.
In the exhaust valve device for an internal combustion engine guided by a bushing 19, a first space 14 expanding downward is formed in the umbrella portion 17, and a valve shaft 18 is provided with a bush 19 that is continuous with the first space 24 and guided by a bush 19. A second space 25 is formed that extends over the first space 24, and a hydraulic fluid 26 is sealed in the bottom of the first space 24. The valve shaft 18 and the valve shaft 18 are connected to each other at a position above the sealing surface 23 of the umbrella section 17. The umbrella portion 17 is provided with bottomed holes 27 and 28 which are spaced apart in the circumferential direction and which connect to the first space 24 and extend diagonally downward radially, and the extension line of the axes of the bottomed holes 27 and 28 is the first
This is an exhaust valve device for an internal combustion engine, which is located within the open end of the space 24, and the upper ends of the bottomed holes 27 and 28 are below the liquid level of the hydraulic fluid 26. FIG. 2 is a cross-sectional view of one embodiment of the invention. A valve body 12 is fixed to a cylinder head 11 of a diesel engine or a spark-ignition internal combustion engine. Coolant passages 13, 14, and 15 are formed in this valve box 12, through which the coolant passes. Exhaust valve 16
basically includes an umbrella portion 17 and a valve stem 18, and is guided vertically in FIG. 2 by a bush 19 fixed to the valve body 12. The top 20 of the exhaust valve 16 is displaced downward in FIG. 2 against the spring force of the spring 21 by a cam mechanism operating in synchronization with the piston. As a result, the sealing surface 23 of the umbrella portion 17 separates from the inner circumferential surface of the valve seat 22 formed in the valve box 12, and the valve is in an open state.
傘部１７および弁軸１８には、空間２４，２５
がそれぞれ形成される。空間２４には、内燃機関
の運転中に気体となる冷却用の作動液２６が、こ
の空間２４の一部分を占めるようにして封入され
ている。空間２４，２５の作動液２６が封入され
ている部分以外の残余の部分は真空である。 Spaces 24 and 25 are provided in the umbrella portion 17 and the valve stem 18.
are formed respectively. A cooling working fluid 26 that becomes a gas during operation of the internal combustion engine is sealed in the space 24 so as to occupy a portion of the space 24 . The remaining portions of the spaces 24 and 25 other than the portion in which the hydraulic fluid 26 is sealed are in a vacuum.
第３図は、傘部１７の平面図である。傘部１７
には、空間２４に連なる有底孔２７，２８が放射
状に形成される。有底孔２７は、長く、周方向に
等間隔に配置されており、有底孔２８はそれらの
有底孔２７相互間において短く形成されている。
有底孔２７，２８は第４図に示されるようにドリ
ル２９を用いて穿孔することができる。 FIG. 3 is a plan view of the umbrella section 17. Umbrella part 17
Bottomed holes 27 and 28 are formed radially in the space 24 . The bottomed holes 27 are long and arranged at regular intervals in the circumferential direction, and the bottomed holes 28 are formed short between the bottomed holes 27.
The bottomed holes 27, 28 can be drilled using a drill 29 as shown in FIG.
空間２４は傘部１７に、下方に拡つて形成され
る。軸部３２の空間２５は、前記空間２４に連な
り、ブツシユ１９によつて案内される部分にわた
つて延びる作動液２６は空間２４の底部に封入さ
れている。この傘部１７と弁軸１８とは、第２図
に明らかなように、シール面２３よりも上方位置
で、固定される。有底孔２７，２８は、空間２４
に連なり斜め下方に放射状に延びており、それら
の軸線の延長線は、第４図に明らかなように、空
間２４の開口端内にあり、これによつて上述のよ
うにドリル２９を用いて穿孔することができる。
有底孔２７，２８の上端部は、作動液２６の液面
よりも、第２図に明らかなように、下方にある。 The space 24 is formed in the umbrella portion 17 and expands downward. A space 25 of the shaft portion 32 is continuous with the space 24, and a hydraulic fluid 26 extending over the portion guided by the bush 19 is sealed at the bottom of the space 24. As is clear from FIG. 2, the umbrella portion 17 and the valve stem 18 are fixed at a position above the sealing surface 23. The bottomed holes 27 and 28 are the spaces 24
The extended lines of these axes are located within the open end of the space 24, as shown in FIG. Can be perforated.
The upper ends of the bottomed holes 27 and 28 are located below the liquid level of the hydraulic fluid 26, as is clear from FIG.
燃焼室の熱は、シール面２３から弁座２２を経
て部分的に放散されるが、残余の熱は作動液２６
に伝えられる。これによつて作動液２６が蒸発さ
れる。生じた蒸気は、冷却水通路１４付近に隣接
する弁軸１８の空間２５の内壁で凝縮して液体と
なつて弁底１７ａに自重で落下する。こうして傘
部１７付近からの熱が蒸発潜熱の形で熱が奪わ
れ、傘部１７の温度を低下することができる。特
に本考案では、有底孔２７，２８が形成されるこ
とによつて傘部１７の中央付近だけでなく、その
外周部分から入る熱をも作動液２６によつて奪わ
れるので、傘部１７全体に亘つて低い温度とする
ことができる。また傘部１７のシール面２３から
弁座２２に伝達される熱量を低滅することがで
き、したがつて弁座２２の温度の低下を達成する
ことができる。こうして傘部１７から吸収した熱
は、作動液２６を蒸発させその蒸気は前述のよう
に弁軸１８の冷却液通路１４付近の低温部分で凝
縮して熱を捨てることができ、効率よく熱輸送を
行なうことができる。 The heat in the combustion chamber is partially dissipated from the sealing surface 23 through the valve seat 22, while the remaining heat is dissipated through the hydraulic fluid 26.
can be conveyed to. As a result, the working fluid 26 is evaporated. The generated steam condenses on the inner wall of the space 25 of the valve shaft 18 adjacent to the cooling water passage 14, becomes a liquid, and falls to the valve bottom 17a under its own weight. In this way, heat from the vicinity of the umbrella section 17 is removed in the form of latent heat of vaporization, and the temperature of the umbrella section 17 can be lowered. In particular, in the present invention, by forming the bottomed holes 27 and 28, heat entering not only from the center of the umbrella part 17 but also from the outer circumferential part is removed by the hydraulic fluid 26. The temperature can be kept low throughout. Further, the amount of heat transferred from the sealing surface 23 of the umbrella portion 17 to the valve seat 22 can be reduced, and therefore the temperature of the valve seat 22 can be reduced. The heat thus absorbed from the umbrella portion 17 evaporates the working fluid 26, and the vapor condenses in the low-temperature portion of the valve shaft 18 near the cooling fluid passage 14 as described above, allowing the heat to be discarded and efficiently transported. can be done.
作動液２６は、たとえば水、ナフタリンなどで
あつてもよい。 The hydraulic fluid 26 may be, for example, water, naphthalene, or the like.
本考案の他の実施例として、作動液２６に代え
て、内燃機関の運転中に液体である冷却媒体たと
えばナトリウムなどが用いられてもよい。こうし
て冷却媒体が排気弁１６の加速度によつて波立た
され、いわゆるシエーカー効果によつて熱放散が
行なわれる。 In other embodiments of the invention, the hydraulic fluid 26 may be replaced by a liquid cooling medium, such as sodium, during operation of the internal combustion engine. The cooling medium is thus rippled by the acceleration of the exhaust valve 16, and heat is dissipated by the so-called sheaker effect.
以上のように本考案によれば、傘部の弁底には
冷却用の液体が封入された空間に連なる有底孔が
形成されているので、傘部の熱を効率よく冷却用
の液体に伝達するこができ、これによつて冷却効
果を充分に発揮することが可能になる。 As described above, according to the present invention, the bottom of the valve part of the umbrella part is formed with a bottomed hole that connects to the space filled with the cooling liquid, so that the heat of the umbrella part is efficiently converted into the cooling liquid. This allows the cooling effect to be fully exerted.
また本考案によれば、傘部１７に、下方に拡つ
た第１空間２４を形成し、この第１空間２４に連
なる有底孔２７，２８を斜め下方に放射状に、か
つ周方向に間隔をあけて形成するようにしたの
で、作動液２６が、前記シエーカー効果によつて
充分な熱放散が行われ、傘部１７が充分に冷却さ
れる。 Further, according to the present invention, the first space 24 expanding downward is formed in the umbrella portion 17, and the bottomed holes 27 and 28 connected to the first space 24 are arranged diagonally downward radially and at intervals in the circumferential direction. Since the opening is formed, sufficient heat is dissipated from the working fluid 26 by the sheaker effect, and the umbrella portion 17 is sufficiently cooled.
また本考案では、傘部１７と弁軸１８とは、傘
部１７のシール面２３よりも上方位置で固定され
ているので、その固定位置が高温度になることが
防がれる。したがつて傘部１７と弁軸１８との固
定を確実に行うことができる。このような固定
は、たとえば溶接であつてもよく、その場合、前
記固定位置で運転中の高温度に起因した熱応力が
生じることが防がれ、長寿命となる。 Further, in the present invention, since the umbrella portion 17 and the valve stem 18 are fixed at a position above the sealing surface 23 of the umbrella portion 17, the temperature at the fixed position is prevented from becoming high. Therefore, the umbrella portion 17 and the valve stem 18 can be securely fixed. Such fixing may be, for example, by welding, in which case thermal stresses due to high temperatures during operation are prevented from occurring in the fixing position, resulting in a long service life.
さらにまた本考案では、有底孔２７，２８の軸
線の延長線は、第１空間２４の開口端内にあり、
これによつて有底孔２７，２８をドリルによつて
穿孔することができる。そのため生産性が良好で
ある。 Furthermore, in the present invention, the extension line of the axes of the bottomed holes 27 and 28 is within the open end of the first space 24,
This allows the bottomed holes 27 and 28 to be drilled with a drill. Therefore, productivity is good.
また本考案では、このドリルによつて穿孔され
る有底孔２７，２８が形成されることによつて、
傘部１７におけるシール面２３付近の強度を向上
することができるという優れた効果が達成され
る。 In addition, in the present invention, by forming the bottomed holes 27 and 28 drilled by this drill,
An excellent effect is achieved in that the strength near the sealing surface 23 in the umbrella portion 17 can be improved.
しかもまた本考案では、有底孔２７，２８の上
端部は、作動液２６の液面よりも下方にあり、こ
れによつて有底孔２７，２８内には作動液２６が
充満され、それらの有底孔２７，２８内で作動液
２６が蒸発してしまうことが防がれる。このこと
によつてもまた傘部１７を充分に冷却することが
可能となる。 Moreover, in the present invention, the upper ends of the bottomed holes 27, 28 are located below the liquid level of the hydraulic fluid 26, so that the bottomed holes 27, 28 are filled with the hydraulic fluid 26, and This prevents the working fluid 26 from evaporating within the bottomed holes 27 and 28. This also makes it possible to sufficiently cool the umbrella section 17.
第１図は先行技術の断面図、第２図は本考案の
一実施例の断面図、第３図は傘部１７の平面図、
第４図は傘部１７の有底孔２７，２８を形成する
工程を示す断面図である。
１６……排気弁、１７……傘部、１７ａ……弁
底、１８……弁軸、２４，２５……空間、２６…
…作動液、２７，２８……有底孔。
FIG. 1 is a sectional view of the prior art, FIG. 2 is a sectional view of an embodiment of the present invention, and FIG. 3 is a plan view of the umbrella portion 17.
FIG. 4 is a sectional view showing the process of forming the bottomed holes 27 and 28 of the umbrella portion 17. 16... Exhaust valve, 17... Umbrella portion, 17a... Valve bottom, 18... Valve stem, 24, 25... Space, 26...
...Hydraulic fluid, 27, 28...Bottomed hole.
Claims (1)
８とを有する弁体１６を、ブツシユ１９によつて
案内する内燃機関の排気弁装置において、 傘部１７に、下方に拡つた第１空間１４を形成
し、 弁軸１８には、第１空間２４に連なりブツシユ
１９によつて案内される部分にわたつて延びる第
２空間２５を形成し、 第１空間２４の底部に、作動液２６を封入し、 傘部１７のシール面２３よりも上方位置で、傘
部１７と弁軸１８とが固定され、 傘部１７には、第１空間２４に連なり斜め下方
に放射状に延びる有底孔２７，２８が周方向に間
隔をあけて形成され、 前記有底孔２７，２８の軸線の延長線は、第１
空間２４の開口端内にあり、 有底孔２７，２８の上端部は作動液２６の液面
よりも下方にあることを特徴とする内燃機関の排
気弁装置。[Claims for Utility Model Registration] Umbrella portion 17 and valve stem 1 fixed to the umbrella portion 17
In an exhaust valve device for an internal combustion engine in which a valve body 16 having a valve body 8 is guided by a bush 19, a first space 14 expanding downward is formed in the umbrella portion 17, and a first space is formed in the valve stem 18. A second space 25 is formed which is continuous with 24 and extends over a portion guided by the bush 19, and a working fluid 26 is sealed in the bottom of the first space 24, and the second space 25 is located above the sealing surface 23 of the umbrella part 17. The umbrella part 17 and the valve stem 18 are fixed, and the umbrella part 17 is formed with bottomed holes 27 and 28 that are connected to the first space 24 and extend diagonally downward radially at intervals in the circumferential direction. The extension line of the axes of the bottomed holes 27 and 28 is the first
An exhaust valve device for an internal combustion engine, wherein the exhaust valve device is located within the open end of the space 24, and the upper ends of the bottomed holes 27 and 28 are located below the liquid level of the working fluid 26.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17906183U JPS6087314U (en) | 1983-11-18 | 1983-11-18 | Internal combustion engine exhaust valve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17906183U JPS6087314U (en) | 1983-11-18 | 1983-11-18 | Internal combustion engine exhaust valve device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6087314U JPS6087314U (en) | 1985-06-15 |
| JPH0117606Y2 true JPH0117606Y2 (en) | 1989-05-23 |
Family
ID=30388594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17906183U Granted JPS6087314U (en) | 1983-11-18 | 1983-11-18 | Internal combustion engine exhaust valve device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6087314U (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014054113A1 (en) * | 2012-10-02 | 2014-04-10 | 日鍛バルブ株式会社 | Hollow poppet valve |
| JP6653050B1 (en) | 2018-03-20 | 2020-02-26 | 日鍛バルブ株式会社 | Hollow poppet valve for exhaust |
| JP7190506B2 (en) | 2018-11-12 | 2022-12-15 | 株式会社Nittan | Manufacturing method of engine poppet valve |
| WO2021199190A1 (en) | 2020-03-30 | 2021-10-07 | 日鍛バルブ株式会社 | Method for manufacturing engine poppet valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5741364U (en) * | 1980-08-20 | 1982-03-05 |
-
1983
- 1983-11-18 JP JP17906183U patent/JPS6087314U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5741364U (en) * | 1980-08-20 | 1982-03-05 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6087314U (en) | 1985-06-15 |
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