JPS6129930Y2 - - Google Patents
Info
- Publication number
- JPS6129930Y2 JPS6129930Y2 JP13364581U JP13364581U JPS6129930Y2 JP S6129930 Y2 JPS6129930 Y2 JP S6129930Y2 JP 13364581 U JP13364581 U JP 13364581U JP 13364581 U JP13364581 U JP 13364581U JP S6129930 Y2 JPS6129930 Y2 JP S6129930Y2
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- valve seat
- valve
- cooling
- 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
- 239000000498 cooling water Substances 0.000 claims description 41
- 238000001816 cooling Methods 0.000 claims description 14
- 238000002485 combustion reaction Methods 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 14
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 239000013505 freshwater Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
Description
【考案の詳細な説明】
本考案は内燃機関における弁座部の冷却装置に
係り、さらに詳しくは、弁座部の硫酸腐蝕を防止
することができる内燃機関における弁座部の冷却
装置に関するものである。[Detailed Description of the Invention] The present invention relates to a cooling device for a valve seat in an internal combustion engine, and more specifically, to a cooling device for a valve seat in an internal combustion engine that can prevent sulfuric acid corrosion of the valve seat. be.
一般に、内燃機関の排気弁のまわりは冷却水を
循環させることにより冷却が行なわれている。こ
の冷却水は、通常はシリンダジヤケツトを通り、
シリンダカバー部を循環し、弁座部を通つて弁棒
部の周囲を冷却して排水されている。 Generally, the area around the exhaust valve of an internal combustion engine is cooled by circulating cooling water. This cooling water normally passes through a cylinder jacket and
The water circulates through the cylinder cover, passes through the valve seat, cools the area around the valve stem, and is then drained.
ところが、このような冷却構造を採用すると、
弁座部に対して温度の低い冷却水が供給されるた
め、弁座部の過冷却が生じ、その結果、弁座部に
流酸腐蝕が生じる結果となる。 However, when such a cooling structure is adopted,
Since low-temperature cooling water is supplied to the valve seat, the valve seat is overcooled, resulting in hydroacid corrosion on the valve seat.
この硫酸腐蝕が生じると、排気弁の完全な閉鎖
状態が生じることがなくなるため、1000時間程度
で弁座部の交換を行なわなければならず、補修作
業が頻繁となり、長時間にわたる運転ができない
という欠点があつた。 If this sulfuric acid corrosion occurs, the exhaust valve will not be able to close completely, so the valve seat will have to be replaced after about 1,000 hours, requiring frequent repair work and making long-term operation impossible. There were flaws.
本考案は以上のような従来の欠点を除去するた
めになされたもので、過冷却による弁座部の硫酸
腐蝕が生じないように構成した内燃機関における
弁座部の冷却装置を提供することを目的としてい
る。 The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional technology, and aims to provide a cooling device for a valve seat in an internal combustion engine that is configured to prevent sulfuric acid corrosion of the valve seat due to supercooling. The purpose is
本考案においては、上記の目的を達成するため
に、シリンダジヤケツト、シリンダカバー及び排
気弁の弁棒部を順次冷却する冷却水通路の出口
と、弁座用の冷却水入口の間の通路にブースタポ
ンプを設け、冷却を終わつてある程度昇温された
冷却水を巡環させることにより、暖かい水で弁座
部を冷却し、硫酸腐蝕が生じないようにした構造
を採用した。 In the present invention, in order to achieve the above object, a cooling water passage is provided between the outlet of the cooling water passage that sequentially cools the cylinder jacket, cylinder cover, and valve stem of the exhaust valve, and the cooling water inlet for the valve seat. A booster pump is installed to circulate cooling water that has been heated to a certain temperature after cooling, thereby cooling the valve seat with warm water and preventing sulfuric acid corrosion.
以下、図面に示す実施例と共に、本考案を詳細
に説明する。 Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
第１図は本考案の１実施例を示すもので、図に
おいて符号１で示すものはシリンダジヤケツト
で、シリンダ２の外側を覆つている。シリンダ２
の上部にはシリンダカバー３が設けられており、
このシリンダカバー３の内側に弁座部４が形成さ
れている。シリンダカバー３には、排気弁ボツク
ス５が連結されており、この内部に排気弁６が昇
降自在に設けられている。排気弁６の弁頭部６ａ
は、弁座部４に着座し得る構成とされており、弁
軸６ｂは昇降自在に案内されている。 FIG. 1 shows one embodiment of the present invention, and what is designated by the reference numeral 1 in the figure is a cylinder jacket, which covers the outside of the cylinder 2. As shown in FIG. cylinder 2
A cylinder cover 3 is provided on the top of the cylinder.
A valve seat portion 4 is formed inside this cylinder cover 3. An exhaust valve box 5 is connected to the cylinder cover 3, and an exhaust valve 6 is provided inside the box so as to be movable up and down. Valve head 6a of exhaust valve 6
is configured to be able to sit on the valve seat portion 4, and the valve shaft 6b is guided so as to be freely raised and lowered.
前記シリンダジヤケツト１の下端部には、冷却
水を供給する冷却水入口管７が連結され、シリン
ダジヤケツト１とシリンダカバー２との間は、配
管８によつて連絡され、シリンダカバー３内に形
成された冷却水通路９に冷却水を供給している。
この冷却水は、次に通路５ａを通つて排気弁ボツ
クス５内に送られ、ここで弁棒６ｂの案内部を冷
却し、冷却水出口管１０を通つて排出される。こ
の時の圧力は例えば１Kg／cm2である。 A cooling water inlet pipe 7 for supplying cooling water is connected to the lower end of the cylinder jacket 1, and a pipe 8 communicates between the cylinder jacket 1 and the cylinder cover 2. Cooling water is supplied to a cooling water passage 9 formed in.
This cooling water is then passed through the passage 5a into the exhaust valve box 5, where it cools the guide of the valve stem 6b, and is discharged through the cooling water outlet pipe 10. The pressure at this time is, for example, 1 Kg/cm 2 .
一方、排気弁ボツクス５の壁の一部には、排気
弁冷却水の入口管１１が連結されており、この入
口管１１から供給された冷却水は、前記壁の中の
冷却水通路１１ａを通つて、弁座部４内の冷却穴
４ａ中に送られ、ここで弁座部４を冷却する。弁
座部４を冷却した冷却水は、通路４ｂを通つて排
気弁ボツクス５の一部に送られる。 On the other hand, an inlet pipe 11 for exhaust valve cooling water is connected to a part of the wall of the exhaust valve box 5, and the cooling water supplied from this inlet pipe 11 flows through a cooling water passage 11a in the wall. It is sent through the cooling hole 4a in the valve seat part 4, where the valve seat part 4 is cooled. The cooling water that has cooled the valve seat portion 4 is sent to a part of the exhaust valve box 5 through the passage 4b.
排気弁冷却水の入口管１１と、前記冷却水出口
管１０との間には、ブースタポンプ１３が接続さ
れており、このブースタポンプ１３によつて、例
えば2.5Kg／cm2の冷却水が弁座部４の冷却水通路
１１ａに供給される。この場合、弁座部４の冷却
穴４ｂの中の冷却水の圧力が、排気弁ボツクス５
中の冷却水の圧力より高いので、排気弁ボツクス
５中から冷却穴４ｂ中へ、冷却水が逆流すること
はない。 A booster pump 13 is connected between the exhaust valve cooling water inlet pipe 11 and the cooling water outlet pipe 10, and the booster pump 13 supplies, for example, 2.5 kg/cm 2 of cooling water to the valve. The cooling water is supplied to the cooling water passage 11a of the seat portion 4. In this case, the pressure of the cooling water in the cooling hole 4b of the valve seat portion 4 increases to the exhaust valve box 5.
Since the pressure is higher than the pressure of the cooling water inside, the cooling water will not flow back from inside the exhaust valve box 5 into the cooling hole 4b.
ところで、第２図からも明らかなように、ブー
スタポンプ１３によつて供給される冷却水は、循
環を終了して油分離タンク１２により含まれてい
る油分を分離された冷却水で、循環過程によつて
昇温されており、この加温された冷却水が弁座部
４の冷却穴４ａ中に供給されるため、弁座部４の
過冷却は生じないし、硫酸腐蝕は生じない。 By the way, as is clear from FIG. 2, the cooling water supplied by the booster pump 13 is the cooling water that has completed its circulation and the oil contained therein has been separated by the oil separation tank 12. Since the heated cooling water is supplied into the cooling hole 4a of the valve seat 4, the valve seat 4 is not overcooled and sulfuric acid corrosion does not occur.
第２図において、符号１４号で示す通路は、燃
料弁冷却水循環用の通路を示し、１２は膨張タン
ク兼油分離タンクを示し、１５は清水ポンプを示
し、１６は清水冷却器、１７はバイパス弁を示
す。そして、冷却水は冷却水入口管７部へ送られ
る。 In Fig. 2, the passage numbered 14 is a passage for circulating fuel valve cooling water, 12 is an expansion tank and oil separation tank, 15 is a fresh water pump, 16 is a fresh water cooler, and 17 is a bypass. Showing the valve. The cooling water is then sent to the cooling water inlet pipe section 7.
本実施例は、以上のように構成されているた
め、弁座部分には、他の部分を冷却してある程度
加温された冷却水が供給されるため、弁座部の過
冷却は生じず、硫酸腐蝕が生じにくくなる。この
ため、弁座部の交換は5000時間程度の運転後にお
いて行なえばよく、補修作業は極めて容易とな
り、長時間の運転が可能となる。 Since this embodiment is configured as described above, the valve seat part is supplied with cooling water that has been heated to a certain extent by cooling other parts, so that overcooling of the valve seat part does not occur. , sulfuric acid corrosion is less likely to occur. Therefore, the valve seat only needs to be replaced after about 5,000 hours of operation, making repair work extremely easy and allowing long-term operation.
以上の説明から明らかなように、本考案によれ
ば、弁座部の冷却を加温された冷却水によつて行
なう構成とされているため、弁座部の過冷却は生
せず、硫酸腐蝕が生じることがない内燃機関の弁
座部の冷却装置を得ることができる。 As is clear from the above explanation, according to the present invention, the valve seat is cooled by heated cooling water, so supercooling of the valve seat does not occur, and the sulfuric acid A cooling device for a valve seat of an internal combustion engine that does not cause corrosion can be obtained.
図面は、本考案の１実施例を説明するもので、
第１図は縦断面図、第２図は冷却水用の回路図で
ある。
１……シリンダジヤケツト、３……シリンダカ
バー、４……弁座部、５……排気弁ボツクス、６
……排気弁、７……冷却水入口管、９……冷却水
路、１０……冷却水出口管、１１……排気弁冷却
水入口管、１３……ブースタポンプ、１５……清
水ポンプ。
The drawings illustrate one embodiment of the invention.
FIG. 1 is a longitudinal sectional view, and FIG. 2 is a circuit diagram for cooling water. 1... Cylinder jacket, 3... Cylinder cover, 4... Valve seat, 5... Exhaust valve box, 6
... Exhaust valve, 7 ... Cooling water inlet pipe, 9 ... Cooling water channel, 10 ... Cooling water outlet pipe, 11 ... Exhaust valve cooling water inlet pipe, 13 ... Booster pump, 15 ... Fresh water pump.
Claims (1)
気弁の弁棒部を順次冷却する冷却水路の出口と、
弁座用の冷却水入口の間の通路にブースタポンプ
を設け、弁座部の冷却水通路を排気弁用の冷却水
通路に連通させたことを特徴とする内燃機関にお
ける弁座部の冷却装置。 an outlet of a cooling waterway that sequentially cools the cylinder jacket, the cylinder cover, and the valve stem of the exhaust valve;
A cooling device for a valve seat in an internal combustion engine, characterized in that a booster pump is provided in a passage between a cooling water inlet for a valve seat, and a cooling water passage in the valve seat communicates with a cooling water passage for an exhaust valve. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13364581U JPS5840518U (en) | 1981-09-10 | 1981-09-10 | Cooling device for valve seat in internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13364581U JPS5840518U (en) | 1981-09-10 | 1981-09-10 | Cooling device for valve seat in internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5840518U JPS5840518U (en) | 1983-03-17 |
| JPS6129930Y2 true JPS6129930Y2 (en) | 1986-09-03 |
Family
ID=29927096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13364581U Granted JPS5840518U (en) | 1981-09-10 | 1981-09-10 | Cooling device for valve seat in internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5840518U (en) |
-
1981
- 1981-09-10 JP JP13364581U patent/JPS5840518U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5840518U (en) | 1983-03-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| SU635893A3 (en) | Internal combustion engine cooling system | |
| JP2687140B2 (en) | Marine engine cooling system | |
| CN105298613A (en) | Double-loop cooling system and method for engine | |
| US6379201B1 (en) | Marine engine cooling system with a check valve to facilitate draining | |
| US2757650A (en) | Thermostatic control for marine engine cooling systems | |
| JPS6129930Y2 (en) | ||
| US2443518A (en) | Cooling system for internal-combustion engines | |
| US5163410A (en) | Fuel circuit with thermostat-controlled fuel preheating for preferably air-compressing injection-type internal combustion engines | |
| US4681067A (en) | Liquid-cooled engine of the vertical shaft type | |
| US1712464A (en) | Internal-combustion engine | |
| CN214403784U (en) | Cylinder cover for strengthening cooling of valve guide pipe | |
| US3741173A (en) | Cylinder head of an air cooled internal combustion engine | |
| JPS5851412Y2 (en) | Fuel injection valve device for diesel engine | |
| JPS58106122A (en) | Cooling device of internal-combustion engine | |
| JPS6226583Y2 (en) | ||
| JPS6329146Y2 (en) | ||
| GB1564692A (en) | Cooling circuit for the cylinder heat of an internal combustion engine | |
| JPH0746730Y2 (en) | Engine cooling system | |
| JPH01227850A (en) | Engine cooler | |
| JPS6117217Y2 (en) | ||
| JPS6034741Y2 (en) | Coolant circulation system for liquid-cooled internal combustion engines | |
| JPS6042182Y2 (en) | fresh water cooling engine | |
| JPH0351900B2 (en) | ||
| JPS639086B2 (en) | ||
| JPS63170519A (en) | Cylinder head oil cooling device for auxiliary chamber type engine |