JPS6124652Y2 - - Google Patents
Info
- Publication number
- JPS6124652Y2 JPS6124652Y2 JP1980112608U JP11260880U JPS6124652Y2 JP S6124652 Y2 JPS6124652 Y2 JP S6124652Y2 JP 1980112608 U JP1980112608 U JP 1980112608U JP 11260880 U JP11260880 U JP 11260880U JP S6124652 Y2 JPS6124652 Y2 JP S6124652Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- exhaust
- valve box
- cooling chamber
- box
- 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
- 238000001816 cooling Methods 0.000 claims description 23
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002826 coolant Substances 0.000 description 15
- 239000007789 gas Substances 0.000 description 9
- 238000005461 lubrication Methods 0.000 description 4
- 239000000567 combustion gas Substances 0.000 description 3
- 239000013505 freshwater Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
Landscapes
- Details Of Valves (AREA)
Description
【考案の詳細な説明】
本案は例えば比較的大きな２サイクル内熱機関
に使用されている、排気通路をシリンダカバーと
は独立に形成する排気弁箱の改良に係るものであ
る。[Detailed Description of the Invention] The present invention relates to an improvement of an exhaust valve box used, for example, in a relatively large two-stroke internal heat engine, in which the exhaust passage is formed independently of the cylinder cover.
第１図はこの種の排気弁箱を有する排気弁廻り
の従来構造を示すものである。１は弁箱で、同弁
箱１には弁座２及び弁棒３が弁ばね４及びばね押
え５を介して組付けられ、排気弁廻りをシリンダ
カバー６とは独立して形成している。図中７は弁
棒３の摺動を円滑ならしめるために、潤滑上好ま
しい材料より構成されたブツシユである。なお前
記弁箱１は弁座２とともに同弁座２とシリンダカ
バー６との接触面２ａにおいてボルト（図示せ
ず）によつて締結される。 FIG. 1 shows a conventional structure around an exhaust valve having this type of exhaust valve box. Reference numeral 1 denotes a valve box. A valve seat 2 and a valve stem 3 are assembled to the valve box 1 via a valve spring 4 and a spring retainer 5, and the area around the exhaust valve is formed independently of the cylinder cover 6. . In the figure, 7 is a bush made of a material suitable for lubrication in order to smooth the sliding movement of the valve stem 3. The valve box 1 and the valve seat 2 are fastened together at the contact surface 2a between the valve seat 2 and the cylinder cover 6 with bolts (not shown).
弁棒３は排気弁駆動装置（図示せず）によつて
設定された時期に開閉され、シリンダ８内の燃焼
ガスを流出させ、同シリンダ８内の燃焼ガスを掃
気口（図示せず）等からシリンダ８内に流入する
新気と置換するようになつている。 The valve stem 3 is opened and closed at set times by an exhaust valve drive device (not shown) to allow combustion gas in the cylinder 8 to flow out, and to direct the combustion gas in the cylinder 8 to a scavenging port (not shown) or the like. The air is replaced with fresh air flowing into the cylinder 8.
前記シリンダ８内の高温の燃焼ガスは弁棒３が
開くと、シリンダ８内より矢印ａの如く流出し、
弁箱１側方に設けた排気通路１ａを通つて、図示
しない排気管、過結機及び排気エコノマイザ等を
通つて大気中に流出する。 When the valve stem 3 opens, the high-temperature combustion gas in the cylinder 8 flows out from the cylinder 8 as shown by arrow a.
It flows out into the atmosphere through an exhaust passage 1a provided on the side of the valve box 1, an exhaust pipe, a condenser, an exhaust economizer, etc. (not shown).
従つて排気通路１ａは高温の排気ガスに曝され
ているので、弁箱１の温度上昇を防止するため
と、弁棒３とブツシユ７との間の摺動部の潤滑性
能を維持するために清水等の冷却剤が冷却され、
また、弁座２も耐久性向上のために清水等の冷却
剤で冷却されるように構成されている。 Therefore, since the exhaust passage 1a is exposed to high-temperature exhaust gas, in order to prevent the temperature of the valve body 1 from rising, and to maintain the lubrication performance of the sliding part between the valve stem 3 and the bush 7, Coolant such as fresh water is cooled,
Further, the valve seat 2 is also configured to be cooled with a coolant such as fresh water to improve durability.
即ち冷却剤は矢印ｂに示す如く、弁箱１に設け
た冷却剤流入口１ｂより順次弁箱１の冷却室１
ｃ，１ｄ内に流入し、弁箱１及び弁座２を冷却し
て弁箱１に設けた冷却剤流出口１ｅより流出す
る。 That is, as shown by arrow b, the coolant flows sequentially from the coolant inlet 1b provided in the valve box 1 to the cooling chamber 1 of the valve box 1.
c, 1d, cools the valve box 1 and valve seat 2, and flows out from the coolant outlet 1e provided in the valve box 1.
しかしながら前記従来の排気弁箱においては、
弁箱１が冷却されているため、シリンダ８から流
出した排気ガスは、弁箱１の排気通路１ａを通過
する間に冷却され、排気ガスの有するエネルギは
その分冷却損失を生じ、過給機及び排ガスエコノ
マイザで利用できる排気エネルギが減少する。こ
のため排ガスエコノマイザの伝熱面積を大きくし
なければならず、場合によつては排気ガスによる
ターボ発電ができないことも生じ、省エネルギの
観点より好ましくない。 However, in the conventional exhaust valve box,
Since the valve box 1 is cooled, the exhaust gas flowing out from the cylinder 8 is cooled while passing through the exhaust passage 1a of the valve box 1, and the energy of the exhaust gas causes a corresponding cooling loss, which causes a cooling loss in the supercharger. and the exhaust energy available to the exhaust gas economizer is reduced. Therefore, the heat transfer area of the exhaust gas economizer must be increased, and in some cases, turbo power generation using the exhaust gas may not be possible, which is undesirable from the viewpoint of energy saving.
また弁箱１は鋳造品であるため、冷却室１ｃ，
１ｄは余り小さくできず、その分だけ弁箱１の高
さを高くしなければならない。 Also, since the valve box 1 is a cast product, the cooling chamber 1c,
1d cannot be made too small, and the height of the valve box 1 must be increased accordingly.
本案はこのような欠陥を除去するために提案さ
れたもので、シリンダカバーと独立した排気通路
を有する排気弁箱において、排気弁棒ブツシユの
外周面に面した環状の冷却室と、弁座内に形成さ
れた冷却室との２個所の冷却室のみを有し、排気
通路廻りの冷却室を廃止してなることを特徴とす
る排気弁箱に係るものである。 This proposal was proposed in order to eliminate such defects.In an exhaust valve box that has an exhaust passage independent of the cylinder cover, an annular cooling chamber facing the outer circumferential surface of the exhaust valve stem bushing and an annular cooling chamber inside the valve seat. This relates to an exhaust valve box characterized in that it has only two cooling chambers, a cooling chamber formed in the exhaust passageway, and a cooling chamber formed around the exhaust passage.
本案に係る排気弁箱においては前記したように
排気通路廻りを冷却剤等による強制冷却をしない
ので、排気ガスの熱損失が少なく、過給機や排ガ
スエコノマイザ等で利用できる排気熱量が大き
い。また排気通路廻りの冷却室がないので、弁箱
の高さ及び弁棒の長さを減少でき、コストを節減
でき、また機関室アレンジ上有利である。 In the exhaust valve box according to the present invention, as described above, the area around the exhaust passage is not forcedly cooled with a coolant or the like, so the heat loss of the exhaust gas is small, and the amount of exhaust heat that can be used by a supercharger, an exhaust gas economizer, etc. is large. Furthermore, since there is no cooling chamber around the exhaust passage, the height of the valve box and the length of the valve stem can be reduced, cost can be reduced, and this is advantageous in terms of engine room arrangement.
また本案においては排気弁棒ブツシユの外周面
に面した環状の冷却室と、弁座内に形成された冷
却室との２個所の冷却室が設けられているので、
弁棒とブツシユとの摺動部の温度が低下し、同部
の潤滑が良好に維持されるとともに、弁座が冷却
され、排気通路廻りの冷却室を廃止したのにもか
かわらず、排気弁箱の機能に支障を招来すること
がない。 In addition, in this case, two cooling chambers are provided: an annular cooling chamber facing the outer peripheral surface of the exhaust valve stem bushing and a cooling chamber formed within the valve seat.
The temperature of the sliding part between the valve stem and bushing has decreased, maintaining good lubrication in this part, and the valve seat has been cooled. Despite the elimination of the cooling chamber around the exhaust passage, the exhaust valve There is no problem with the function of the box.
以下本案を図示の実施例について説明する。 The present invention will be described below with reference to illustrated embodiments.
１１は弁箱で、同弁箱１１には弁座１２及び弁
棒１３が弁ばね１４及びばね押え１５を介して一
体に組付けられ、排気弁廻りをシリンダカバー１
６とは独立して形成している。図中１７は弁棒１
３のブツシユ、１８はシリンダである。 Reference numeral 11 denotes a valve box. A valve seat 12 and a valve stem 13 are integrally assembled to the valve box 11 via a valve spring 14 and a spring retainer 15, and the exhaust valve area is covered with a cylinder cover 1.
It is formed independently from 6. 17 in the figure is valve stem 1
3 is a bush, and 18 is a cylinder.
弁箱１１は弁座１２とともにシリンダカバー１
６にボルト１９で締結される。図中２０は弁座１
２とシリンダカバー１６との接触面１２ａに円周
方向に亘つて均一に応力の伝達が行なわれるよう
に配設されたリブである。 The valve box 11 is attached to the cylinder cover 1 along with the valve seat 12.
6 with bolts 19. 20 in the diagram is valve seat 1
These ribs are disposed on the contact surface 12a between the cylinder cover 16 and the cylinder cover 16 so that stress is uniformly transmitted in the circumferential direction.
図示の実施例においては排気ガスの熱損失を節
減するため、弁箱１１の排気通路１１ａの周りの
冷却を廃止している。このため弁箱１１の温度が
高いので、弁棒１３とブツシユ１７との摺動部の
温度を低減し、潤滑を良好に維持するためにブツ
シユ１７の背面を冷却している。即ち冷却剤は矢
印Ａに示す如く弁箱１１に設けた冷却剤流入口１
１ｂよりブツシユ１７の外周に設けられた冷却室
１１ｃに流入して、同ブツシユ１７を冷却したの
ち冷却剤流出口１１ｄより流出するように構成さ
れている。図中２１は冷却剤の漏出を防止するＯ
リングである。 In the illustrated embodiment, cooling around the exhaust passage 11a of the valve body 11 is eliminated in order to reduce heat loss of the exhaust gas. For this reason, the temperature of the valve body 11 is high, so the temperature of the sliding portion between the valve stem 13 and the bush 17 is reduced, and the back surface of the bush 17 is cooled to maintain good lubrication. That is, the coolant flows through the coolant inlet 1 provided in the valve box 11 as shown by arrow A.
The coolant flows from 1b into a cooling chamber 11c provided on the outer periphery of the bush 17, cools the bush 17, and then flows out from a coolant outlet 11d. 21 in the figure is O to prevent coolant leakage.
It's a ring.
また弁座１２の冷却は、矢印Ｂに示す如く冷却
剤を弁箱１１に設けた冷却剤流入口１１ｅより弁
座１２の周壁に設けた冷却室１２ｂに導入して弁
箱１１に設けられた冷却剤流出口（図示せず）よ
り流出せしめることによつて行なうものである。 The valve seat 12 is cooled by introducing the coolant from a coolant inlet 11e provided in the valve case 11 into a cooling chamber 12b provided in the peripheral wall of the valve seat 12, as shown by arrow B. This is done by letting the coolant flow out from a coolant outlet (not shown).
なお前記弁箱１１の排気通路１１ａの外壁部１
１ｆは、石綿等の断熱材で被覆するものである。 Note that the outer wall portion 1 of the exhaust passage 11a of the valve box 11
1f is for covering with a heat insulating material such as asbestos.
第１図は従来の排気弁箱の縦断面図、第２図は
本案に係る排気弁箱の一実施例を示す縦断面図、
第３図は第２図の矢視−図である。
１１……弁箱、１２……弁座、１３……弁棒、
１７……ブツシユ、１１ｃ……冷却室、１２ｂ…
…冷却室。
FIG. 1 is a vertical cross-sectional view of a conventional exhaust valve box, and FIG. 2 is a vertical cross-sectional view showing an embodiment of the exhaust valve box according to the present invention.
FIG. 3 is a view taken in the direction of the arrows in FIG. 11...Valve box, 12...Valve seat, 13...Valve stem,
17...butsuyu, 11c...cooling room, 12b...
...Cooling room.
Claims (1)
気弁箱において、排気弁棒ブツシユの外周面に面
した環状の冷却室と、弁座内に形成された冷却室
との２個所の冷却室のみを有し、排気通路廻りの
冷却室を廃止してなることを特徴とする排気弁
箱。 The exhaust valve box has an exhaust passage independent of the cylinder cover, and has only two cooling chambers: an annular cooling chamber facing the outer peripheral surface of the exhaust valve stem bushing and a cooling chamber formed within the valve seat. , an exhaust valve box characterized by eliminating the cooling chamber around the exhaust passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980112608U JPS6124652Y2 (en) | 1980-08-11 | 1980-08-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980112608U JPS6124652Y2 (en) | 1980-08-11 | 1980-08-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5736316U JPS5736316U (en) | 1982-02-25 |
| JPS6124652Y2 true JPS6124652Y2 (en) | 1986-07-24 |
Family
ID=29473652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980112608U Expired JPS6124652Y2 (en) | 1980-08-11 | 1980-08-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6124652Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7241512B2 (en) * | 2018-11-19 | 2023-03-17 | 株式会社ジャパンエンジンコーポレーション | cooling structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5395444A (en) * | 1977-01-28 | 1978-08-21 | Sulzer Ag | Piston type internal combustion engine |
-
1980
- 1980-08-11 JP JP1980112608U patent/JPS6124652Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5395444A (en) * | 1977-01-28 | 1978-08-21 | Sulzer Ag | Piston type internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5736316U (en) | 1982-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2001065092A1 (en) | Four stroke engine with cooling system | |
| JP3012796U (en) | Exhaust liner and seal assembly | |
| JPS5813073Y2 (en) | Scavenging device for 2-stroke engine | |
| JPS6124652Y2 (en) | ||
| CA1055346A (en) | Insulated, high efficiency, low heat rejection, engine cylinder head | |
| JPH0627772Y2 (en) | Blow-by gas reduction device | |
| EP0076348B1 (en) | Exhaust valve casing | |
| US5809960A (en) | Intake pipe in an internal combustion engine with carburetor | |
| US2935055A (en) | Concentric valve internal combustion engine | |
| JPS6320821Y2 (en) | ||
| JP3242662B2 (en) | Internal combustion engine | |
| JPS6126581Y2 (en) | ||
| JPS6081457A (en) | Internal-combustion engine | |
| JPH03491Y2 (en) | ||
| JPS594521B2 (en) | Internal combustion engine exhaust valve cooling system | |
| JPS5910331Y2 (en) | Internal combustion engine with rotary valve | |
| JPH0326245Y2 (en) | ||
| JPS5919785Y2 (en) | Device for cooling internal combustion engines and promoting combustion of unburned gas | |
| JPS6026178Y2 (en) | Internal combustion engine cooling system | |
| JPH0437863U (en) | ||
| JPS59185850A (en) | 2-cycle internal-combustion engine | |
| JPS60237114A (en) | Forced cooling device of cylinder head in overhead-valve engine | |
| JPS6329861Y2 (en) | ||
| JPS6187914A (en) | <=ylinder head cooling device for internal-combustion engine | |
| JP2894597B2 (en) | 2 cycle engine |