JPH0741856Y2 - PCV valve of engine - Google Patents
PCV valve of engineInfo
- Publication number
- JPH0741856Y2 JPH0741856Y2 JP7800889U JP7800889U JPH0741856Y2 JP H0741856 Y2 JPH0741856 Y2 JP H0741856Y2 JP 7800889 U JP7800889 U JP 7800889U JP 7800889 U JP7800889 U JP 7800889U JP H0741856 Y2 JPH0741856 Y2 JP H0741856Y2
- Authority
- JP
- Japan
- Prior art keywords
- engine
- blow
- valve
- pcv valve
- holding member
- 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 - Lifetime
Links
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案はエンジンのPCVバルブに係り、特にエンジン
と吸気系とを連絡するブローバイガス通路の途中部位と
エンジンの吸気通路との間に設けられてエンジン内で発
生したブローバイガスの処理を行うエンジンのPCVバル
ブに関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a PCV valve of an engine, and is particularly provided between an intermediate portion of a blow-by gas passage connecting an engine and an intake system and an intake passage of the engine. PCV valve of the engine that processes blow-by gas generated in the engine.
エンジンから大気へ排出されるガスには、その排出経路
によってブローバイガス、蒸発燃料及び燃料排気の３種
類がある。前記ブローバイガスは、ピストンリングの隙
間からクランクケース内に洩れるガスで、未然炭化水素
（HC）が多いことから、主として圧縮行程中に洩れるも
のと考えられる。There are three types of gas discharged from the engine to the atmosphere: blow-by gas, evaporated fuel, and fuel exhaust, depending on the discharge route. The blow-by gas is a gas that leaks into the crankcase through the gap between the piston rings, and it is considered that the blow-by gas mainly leaks during the compression stroke because it contains a large amount of hydrocarbons (HC).
前記ブローバイガスは排気ガス規制が行われる以前に
は、クランクケースにあけられた換気孔からそのまま大
気に放出されていたが、現在では吸気系に戻し、再び燃
焼させるように義務づけられている。Before the regulation of exhaust gas, the blow-by gas was released into the atmosphere as it is from a ventilation hole formed in the crankcase, but now it is obliged to return it to the intake system and burn it again.
また、エンジンのブローバイガス還元装置としては、実
公昭60−98709号公報に開示される如く、エンジンのブ
ローバイガス通路の途中に配置されたブローバイガス流
量制御弁と、外気温が摂氏約零度以下のときのみ閉じる
温度スイッチと、エンジンの不作動時のみ閉じるエンジ
ンスイッチとから成り、ブローバイガス流量制御弁は、
両端壁にそれぞれ入口ポートと出口ポートとが設けられ
ている円筒状のバルブハウジングと、バルブハウジング
内において軸方向に配置され、入口ポートの有効開口面
積と出口ポートの有効開口面積とを可変とするテーパ状
の弁部材と、出口ポートが設けられている側の端壁と弁
部材との間に配置され、弁部材が出口ポートの有効面積
を大きくする方向に弁部材を押圧する圧縮コイルばね
と、バルブハウジングに取付けられているPCVヒータと
から構成されており、PCVヒータに対し温度スイッチと
エンジンスイッチとを直列に接続されているものがあっ
た。Further, as a blow-by gas reducing device for an engine, as disclosed in Japanese Utility Model Publication No. 60-98709, a blow-by gas flow rate control valve disposed in the middle of a blow-by gas passage of an engine and an outside temperature of about 0 degrees Celsius or less are used. The blow-by gas flow control valve consists of a temperature switch that closes only when
A cylindrical valve housing having an inlet port and an outlet port provided on both end walls, respectively, and an axially arranged inside the valve housing, and the effective opening area of the inlet port and the effective opening area of the outlet port are made variable. A tapered valve member, and a compression coil spring that is arranged between the end wall on the side where the outlet port is provided and the valve member, and that presses the valve member in a direction in which the valve member increases the effective area of the outlet port. , A PCV heater attached to the valve housing, and a temperature switch and an engine switch were connected in series to the PCV heater.
ところで、従来のエンジンのPCVバルブにおいては、第
４図に示す如く、PCVバルブ130の本体部132の上流側に
保持部材140が設けられ、この保持部材140に設けられる
貫通孔148の内径が上側から下側までが同一に形成され
ているとともに、前記保持部材140の内径が連絡ホース1
26の内径よりも極めて小さく形成されていた。By the way, in a conventional PCV valve for an engine, as shown in FIG. 4, a holding member 140 is provided on the upstream side of the main body portion 132 of the PCV valve 130, and the inner diameter of the through hole 148 provided in this holding member 140 is the upper side. To the lower side are the same, and the inner diameter of the holding member 140 is equal to that of the connecting hose 1.
It was formed to be extremely smaller than the inner diameter of 26.
この結果、PCVバルブ130の保持部材140の上端面と前記
連絡ホース126の内壁面とにより隅部150が形成され、こ
の隅部150にブローバイガスの凝縮液やその他の異物が
付着滞留してしまい、寒冷時にエンジン（図示せず）を
停止した際に、ブローバイガス中の凝縮液やその他の異
物が凍結して前記PCVバルブ130を閉塞させ、エンジン
（図示せず）の異常停止や破損を招き、実用上不利であ
るという不都合がある。As a result, the corner 150 is formed by the upper end surface of the holding member 140 of the PCV valve 130 and the inner wall surface of the communication hose 126, and the condensate of blow-by gas and other foreign matter adhere and accumulate in the corner 150. , When the engine (not shown) is stopped in cold weather, the condensate and other foreign substances in the blow-by gas freeze and close the PCV valve 130, which causes abnormal stop and damage of the engine (not shown). However, there is an inconvenience that it is disadvantageous in practical use.
そこでこの考案の目的は、上述不都合を除去するため
に、PCVバルブを本体と本体内を摺動する針弁と針弁を
開放方向に付勢するスプリングと本体に装着されスプリ
ングを保持する保持部材とにより形成し、保持部材の上
流側に連絡通路を形成する連絡ホースを接続するととも
に、連絡ホースの内径を維持すべくクランプ上部に維持
部を形成し、保持部材には連絡ホースの内径と略同じ長
大内径を有する上流側に末広り状の貫通孔を形成したこ
とにより、PCVバルブの保持部材上側部位にブローバイ
ガス中の凝縮液やその他の異物が滞留するのを防止し、
凝縮液やその他の異物の凍結を防止でき、実用上有利な
エンジンのPCVバルブを実現するにある。Therefore, in order to eliminate the above-mentioned inconvenience, the object of the present invention is to provide a body for the PCV valve, a needle valve that slides in the body, a spring that urges the needle valve in the opening direction, and a holding member that is attached to the body and holds the spring. And a connecting hose that forms a communication passage on the upstream side of the holding member, and a holding portion is formed on the upper part of the clamp to maintain the inner diameter of the connecting hose. By forming a divergent through-hole on the upstream side having the same long and large inner diameter, it is possible to prevent the condensate in the blow-by gas and other foreign matter from staying in the upper part of the holding member of the PCV valve.
This is to realize a practical PCV valve for an engine that can prevent freezing of condensate and other foreign matter.
この目的を達成するためにこの考案は、エンジンとエア
クリーナとを連絡するブローバイガス通路を設けるとと
もにこのブローバイガス通路途中と吸気通路とを連絡す
る連絡通路途中に設けられたエンジンのPCVバルブにお
いて、このPCVバルブを本体と本体内を摺動する針弁と
針弁を開放方向に付勢するスプリングと前記本体に装着
されスプリングを保持する保持部材とにより形成し、こ
の保持部材の上流側に前記連絡通路を形成する連絡ホー
スを接続するとともに、連絡ホースの内径を維持すべく
クランプ上部に維持部を形成し、前記保持部材には前記
連絡ホースの内径と略同じ最大内径を有する上流側に末
広り状の貫通孔を形成したことを特徴とする。In order to achieve this object, the present invention provides a PCV valve for an engine, which is provided with a blow-by gas passage that connects an engine and an air cleaner, and is provided in the middle of a communication passage that connects the blow-by gas passage and the intake passage. The PCV valve is formed of a main body, a needle valve that slides in the main body, a spring that urges the needle valve in the opening direction, and a holding member that is attached to the main body and holds the spring. A connecting hose that forms a passage is connected, and a retaining portion is formed on the upper part of the clamp to maintain the inner diameter of the connecting hose, and the holding member is diverged to the upstream side having the same maximum inner diameter as the inner diameter of the connecting hose. It is characterized in that a through hole having a circular shape is formed.
上述の如く構成したことにより、エンジンの駆動時に、
このエンジン内で発生したブローバイガスは、ブローバ
イガス通路を通ってエアクリーナ内に還元されるととも
に、前記ブローバイガス通路の途中からPCVバルブを介
して吸気通路に還元されている。By configuring as described above, when the engine is driven,
The blow-by gas generated in this engine is returned to the air cleaner through the blow-by gas passage and also returned to the intake passage from the middle of the blow-by gas passage through the PCV valve.
また、エンジンを寒冷時に停止させた際には、前記PCV
バルブの保持部材上側部位にブローバイガスの凝縮液や
その他の異物が滞留することを防止し、前記PCVバルブ
の閉塞を防止している。Also, when the engine is stopped in cold weather, the PCV
The condensate of blow-by gas and other foreign matter are prevented from staying in the upper part of the holding member of the valve, and the blockage of the PCV valve is prevented.
以下図面に基づいてこの考案の実施例を詳細に説明す
る。An embodiment of the present invention will be described in detail below with reference to the drawings.
第１〜３図はこの考案の実施例を示すものである。第１
〜３図において、２はエンジン、４はシリンダブロッ
ク、６はシリンダヘッド、８はシリンダヘッドカバー、
10はエアクリーナ、12は気化器である。前記エンジン２
のシリンダヘッド６と気化器12とは、内部に吸気通路14
を形成する吸気管16により連絡されている。1 to 3 show an embodiment of this invention. First
In FIG. 3, 2 is an engine, 4 is a cylinder block, 6 is a cylinder head, 8 is a cylinder head cover,
10 is an air cleaner and 12 is a carburetor. Engine 2
The cylinder head 6 and the carburetor 12 of the
Are communicated by an intake pipe 16 forming the.
前記エアクリーナ10にエンジン２のクランクケース18内
で発生するブローバイガスを還元すべく、前記エアクリ
ーナ10とエンジン２のシリンダヘッドカバー８内とを内
部にブローバイガス通路20が形成されたブローバイガス
管22によって接続する。このブローバイガス管22の途中
に三方の分岐管継手24を設け、この分岐管継手24に内部
に連絡通路28が形成された連絡ホース26を接続するとと
もに、この連絡ホース26をPCVバルブ30を介して吸気管1
6に接続する。In order to reduce the blow-by gas generated in the crankcase 18 of the engine 2 to the air cleaner 10, the air cleaner 10 and the cylinder head cover 8 of the engine 2 are connected by a blow-by gas pipe 22 in which a blow-by gas passage 20 is formed. To do. A three-way branch pipe joint 24 is provided in the middle of the blow-by gas pipe 22, a connection hose 26 having a communication passage 28 formed therein is connected to the branch pipe joint 24, and the connection hose 26 is connected via a PCV valve 30. Intake pipe 1
Connect to 6.
このPCVバルブ30は、本体32内の空間部34に摺動可能に
針弁36が挿入されるとともに、この針弁36を開放方向に
付勢するスプリング38が挿入されている。このスプリン
グ38は、前記本体32上流部位に取付けられる保持部材40
によって保持されている。In this PCV valve 30, a needle valve 36 is slidably inserted in a space 34 in a main body 32, and a spring 38 for urging the needle valve 36 in an opening direction is inserted. This spring 38 has a holding member 40 attached to the upstream portion of the main body 32.
Is held by.
また、前記連絡ホース26とPCVバルブ30との接続部位
は、クランプ42により固定されている。このクランプ42
は、第２図に示す如く、固定部44が環状に形成され、こ
の固定部44の上周縁部位に前記連絡ホース26の内径を維
持する維持部46が円周等間隔に、例えば４個形成されて
いる。The connecting portion between the connecting hose 26 and the PCV valve 30 is fixed by a clamp 42. This clamp 42
As shown in FIG. 2, a fixing portion 44 is formed in an annular shape, and four maintaining portions 46, which maintain the inner diameter of the connecting hose 26, are formed at an upper peripheral edge portion of the fixing portion 44 at equal intervals around the circumference. Has been done.
更に、前記保持部材40には、前記連絡ホース26の内径よ
り大なる最大内径を有する上流側に末広り状の貫通孔48
を形成する。Further, the holding member 40 has a divergent through hole 48 on the upstream side having a maximum inner diameter larger than the inner diameter of the connecting hose 26.
To form.
つまり、第１図に示す如く、PCVバルブ30の本体32内の
空間部34と連絡ホース26内とを連絡すべく保持部材40の
下流側から上流側に向かって末広り状の貫通孔48を形成
する。このとき、例えば連絡ホース26の内径D1よりも前
記保持部材40上端面に開口する開口部48−１の内径D2を
大きくすべく形成している。That is, as shown in FIG. 1, a divergent through hole 48 is formed from the downstream side to the upstream side of the holding member 40 in order to connect the space 34 in the main body 32 of the PCV valve 30 and the inside of the communication hose 26. Form. At this time, for example, the inner diameter D2 of the opening 48-1 opening at the upper end surface of the holding member 40 is formed to be larger than the inner diameter D1 of the connecting hose 26.
なお符号50は排気管、52は吸気弁、54は排気弁、56はオ
イルパンである。Reference numeral 50 is an exhaust pipe, 52 is an intake valve, 54 is an exhaust valve, and 56 is an oil pan.
次に作用について説明する。Next, the operation will be described.
エンジン２を駆動させた際に、このエンジン２のクラン
クケース18内で発生したブローバイガスは、ブローバイ
ガス通路20を通ってエアクリーナ10内に還元されるとと
もに、前記ブローバイガス通路20途中から分岐管継手24
によって連絡通路28に分岐され、PCVバルブ30により吸
気管負圧に応じて調量されて吸気通路14に還元されてい
る。The blow-by gas generated in the crankcase 18 of the engine 2 when the engine 2 is driven is returned to the air cleaner 10 through the blow-by gas passage 20, and the branch pipe joint is provided in the middle of the blow-by gas passage 20. twenty four
Is branched to the communication passage 28 by the PCV valve 30, and is metered by the PCV valve 30 according to the negative pressure of the intake pipe to be returned to the intake passage 14.
また、エンジン２を寒冷時に停止させた際には、連絡ホ
ース26の内径D1よりも保持部材40上端面に開口する開口
部48−１の内径D2を大きく形成したので、前記PCVバル
ブ30の保持部材40上側部位にブローバイガスの凝縮液や
その他の異物が滞留するのを防止している。Further, when the engine 2 is stopped during cold weather, the inner diameter D2 of the opening 48-1 opening at the upper end surface of the holding member 40 is formed larger than the inner diameter D1 of the connecting hose 26, so that the PCV valve 30 is held. The condensate of blow-by gas and other foreign matter are prevented from staying in the upper part of the member 40.
これにより、PCVバルブ30の保持部材40上側部位にブロ
ーバイガス中の凝縮液やその他の異物が滞留することを
防止でき、凝縮液やその他の異物の凍結によるPCVバル
ブ30の閉塞を確実に回避でき、エンジン２の異常停止や
破損を防止し得て、実用上有利である。As a result, it is possible to prevent the condensate and other foreign matter in the blow-by gas from accumulating in the upper part of the holding member 40 of the PCV valve 30, and it is possible to reliably prevent the blockage of the PCV valve 30 due to freezing of the condensate and other foreign matter. It is possible to prevent abnormal stoppage and damage of the engine 2, which is practically advantageous.
また、凝縮液やその他の異物の凍結を防止したことによ
り、特に寒冷時のブローバイガスの還元を良好に果たす
ことができ、実用上有利である。Further, by preventing the condensate and other foreign matter from freezing, the reduction of the blow-by gas especially in cold can be achieved well, which is practically advantageous.
更に、ブローバイガス中の凝縮液やその他の異物の凍結
によるエンジンの破損を確実に防止できることにより、
交換部品点数を小とできるとともに、エンジンの使用寿
命を長くでき、経済的に有利である。Furthermore, by reliably preventing engine damage due to freezing of condensate and other foreign matter in blow-by gas,
The number of replacement parts can be reduced and the service life of the engine can be extended, which is economically advantageous.
なお、この考案は上述実施例に限定されるものではな
く、種々の応用改変が可能である。The invention is not limited to the above-described embodiment, but various application modifications can be made.
例えば、この考案の実施例においては、連絡ホースの内
径D1よりも前記保持部材上端面に開口する開口部の内径
D2を大きく形成したが、連絡ホースの内径D1と保持部材
上端面に開口する開口部の内径D2との大きさを同一ある
いは前記連絡ホースの内径D1より保持部材上端面に開口
する開口部の内径D2を少許小さく形成して使用すること
も可能である。For example, in the embodiment of the present invention, the inner diameter of the opening opening at the upper end surface of the holding member is larger than the inner diameter D1 of the connecting hose.
Although D2 is formed large, the inner diameter D1 of the connecting hose and the inner diameter D2 of the opening opening on the upper surface of the holding member are the same or the inner diameter of the opening opening on the upper surface of the holding member is larger than the inner diameter D1 of the connecting hose. It is also possible to form the D2 small and use it.
以上詳細に説明した如くこの考案によれば、PCVバルブ
を本体と本体内を摺動する針弁と針弁を開放方向に付勢
するスプリングと本体に装着されスプリングを保持する
保持部材とにより形成し、保持部材の上流側に連絡通路
を形成する連絡ホースを接続するとともに、連絡ホース
の内径を維持すべくクランプ上部に維持部を形成し、保
持部材には連絡ホースの内径と略同じ最大内径を有する
上流側に末広り状の貫通孔を形成したので、PCVバルブ
の保持部材上側部位にブローバイガス中の凝縮液やその
他の異物が滞留することを防止でき、凝縮液やその他の
異物の凍結によるPCVバルブの閉塞を確実に回避でき、
エンジンの異常停止や破損を防止し得て、特に寒冷時の
ブローバイガスの還元を良好に果たすことができ、実用
上有利である。As described in detail above, according to the present invention, the PCV valve is formed by the main body, the needle valve that slides in the main body, the spring that biases the needle valve in the opening direction, and the holding member that is attached to the main body and holds the spring. The connecting hose that forms the connecting passage is connected to the upstream side of the holding member, and the holding part is formed on the upper part of the clamp to maintain the inner diameter of the connecting hose. Since a divergent through-hole is formed on the upstream side of the PCV valve, it is possible to prevent the condensate and other foreign substances in the blow-by gas from staying in the upper part of the holding member of the PCV valve, and to freeze the condensate and other foreign substances. The blockage of the PCV valve due to
It is possible to prevent abnormal stoppage and damage of the engine, and it is possible to satisfactorily reduce the blow-by gas especially in cold weather, which is practically advantageous.
第１〜３図はこの考案の実施例を示し、第１図はPCVバ
ルブの拡大断面図、第２図はクランプの概略斜視図、第
３図はエンジンの概略説明図である。 第４図は従来の技術を示すPCVバルブの拡大断面図であ
る。 図において、２はエンジン、４はシリンダブロック、６
はシリンダヘッド、８はシリンダヘッドカバー、10はエ
アクリーナ、12は気化器、14は吸気通路、16は吸気管、
18はクランクケース、20はブローバイガス通路、22はブ
ローバイガス管、24は分岐管継手、26は連絡通路、28は
連絡ホース、30はPCVバルブ、32は本体、34は空間部、3
6は針弁、38はスプリング、40保持部材、42はクラン
プ、44は固定部、46は維持部、48は貫通孔、50は排気
管、52は吸気弁、54は排気弁、56はオイルパンである。1 to 3 show an embodiment of the present invention, FIG. 1 is an enlarged sectional view of a PCV valve, FIG. 2 is a schematic perspective view of a clamp, and FIG. 3 is a schematic explanatory view of an engine. FIG. 4 is an enlarged sectional view of a PCV valve showing a conventional technique. In the figure, 2 is an engine, 4 is a cylinder block, 6
Is a cylinder head, 8 is a cylinder head cover, 10 is an air cleaner, 12 is a carburetor, 14 is an intake passage, 16 is an intake pipe,
18 is a crankcase, 20 is a blow-by gas passage, 22 is a blow-by gas pipe, 24 is a branch pipe joint, 26 is a connecting passage, 28 is a connecting hose, 30 is a PCV valve, 32 is a main body, 34 is a space part, 3
6 is a needle valve, 38 is a spring, 40 is a holding member, 42 is a clamp, 44 is a fixed part, 46 is a maintenance part, 48 is a through hole, 50 is an exhaust pipe, 52 is an intake valve, 54 is an exhaust valve, 56 is oil. It's bread.
Claims (1)
ーバイガス通路を設けるとともにこのブローバイガス通
路途中と吸気通路とを連絡する連絡通路途中に設けられ
たエンジンのPCVバルブにおいて、このPCVバルブを本体
と本体内を摺動する針弁と針弁を開放方向に付勢するス
プリングと前記本体に装着されスプリングを保持する保
持部材とにより形成し、この保持部材の上流側に前記連
絡通路を形成する連絡ホースを接続するとともに、連絡
ホースの内径を維持すべくクランプ上部に維持部を形成
し、前記保持部材には前記連絡ホースの内径と略同じ最
大内径を有する上流側に末広り状の貫通孔を形成したこ
とを特徴とするエンジンのPCVバルブ。Claim: What is claimed is: 1. A PCV valve for an engine, wherein a blow-by gas passage is provided for connecting an engine and an air cleaner, and a PCV valve for an engine is provided midway between the blow-by gas passage and an intake passage. A connecting hose that is formed by a needle valve that slides inside, a spring that biases the needle valve in the opening direction, and a holding member that is attached to the main body and holds the spring, and that forms the communication passage on the upstream side of the holding member. And a retaining portion is formed on the upper part of the clamp to maintain the inner diameter of the connecting hose, and the holding member is formed with a divergent through hole on the upstream side having a maximum inner diameter substantially the same as the inner diameter of the connecting hose. The PCV valve of the engine that is characterized by
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7800889U JPH0741856Y2 (en) | 1989-06-30 | 1989-06-30 | PCV valve of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7800889U JPH0741856Y2 (en) | 1989-06-30 | 1989-06-30 | PCV valve of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0317215U JPH0317215U (en) | 1991-02-20 |
| JPH0741856Y2 true JPH0741856Y2 (en) | 1995-09-27 |
Family
ID=31620906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7800889U Expired - Lifetime JPH0741856Y2 (en) | 1989-06-30 | 1989-06-30 | PCV valve of engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0741856Y2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101027704B1 (en) * | 2008-09-19 | 2011-04-12 | 주식회사이원정공 | ??? valve |
| US8926771B2 (en) | 2006-06-29 | 2015-01-06 | Tenaris Connections Limited | Seamless precision steel tubes with improved isotropic toughness at low temperature for hydraulic cylinders and process for obtaining the same |
| US9187811B2 (en) | 2013-03-11 | 2015-11-17 | Tenaris Connections Limited | Low-carbon chromium steel having reduced vanadium and high corrosion resistance, and methods of manufacturing |
| US9188252B2 (en) | 2011-02-18 | 2015-11-17 | Siderca S.A.I.C. | Ultra high strength steel having good toughness |
| US9222156B2 (en) | 2011-02-18 | 2015-12-29 | Siderca S.A.I.C. | High strength steel having good toughness |
| US9340847B2 (en) | 2012-04-10 | 2016-05-17 | Tenaris Connections Limited | Methods of manufacturing steel tubes for drilling rods with improved mechanical properties, and rods made by the same |
| US9598746B2 (en) | 2011-02-07 | 2017-03-21 | Dalmine S.P.A. | High strength steel pipes with excellent toughness at low temperature and sulfide stress corrosion cracking resistance |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6355420B2 (en) * | 2014-05-15 | 2018-07-11 | 日野自動車株式会社 | Ventilator |
-
1989
- 1989-06-30 JP JP7800889U patent/JPH0741856Y2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8926771B2 (en) | 2006-06-29 | 2015-01-06 | Tenaris Connections Limited | Seamless precision steel tubes with improved isotropic toughness at low temperature for hydraulic cylinders and process for obtaining the same |
| KR101027704B1 (en) * | 2008-09-19 | 2011-04-12 | 주식회사이원정공 | ??? valve |
| US9598746B2 (en) | 2011-02-07 | 2017-03-21 | Dalmine S.P.A. | High strength steel pipes with excellent toughness at low temperature and sulfide stress corrosion cracking resistance |
| US9188252B2 (en) | 2011-02-18 | 2015-11-17 | Siderca S.A.I.C. | Ultra high strength steel having good toughness |
| US9222156B2 (en) | 2011-02-18 | 2015-12-29 | Siderca S.A.I.C. | High strength steel having good toughness |
| US9340847B2 (en) | 2012-04-10 | 2016-05-17 | Tenaris Connections Limited | Methods of manufacturing steel tubes for drilling rods with improved mechanical properties, and rods made by the same |
| US9187811B2 (en) | 2013-03-11 | 2015-11-17 | Tenaris Connections Limited | Low-carbon chromium steel having reduced vanadium and high corrosion resistance, and methods of manufacturing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0317215U (en) | 1991-02-20 |
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