JPH07259660A - Exhaust gas recirculating valve of internal combustion engine - Google Patents
Exhaust gas recirculating valve of internal combustion engineInfo
- Publication number
- JPH07259660A JPH07259660A JP6048758A JP4875894A JPH07259660A JP H07259660 A JPH07259660 A JP H07259660A JP 6048758 A JP6048758 A JP 6048758A JP 4875894 A JP4875894 A JP 4875894A JP H07259660 A JPH07259660 A JP H07259660A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- passage
- exhaust gas
- cooling water
- bearing
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
- Details Of Valves (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、弁孔を中央部に開口さ
せた弁座を臨ませた弁室部と、前記弁孔に同軸に通じる
第1通路部と、内端を弁室部に連通させた第2通路部と
から成る排気還流通路を有する弁ハウジングに、前記弁
孔と同軸の軸受部が設けられ、弁ハウジングに取付けら
れた駆動手段から延設されるとともに前記軸受部で軸方
向移動可能に支承される駆動軸には前記弁座に着座可能
な弁体が設けられる内燃機関の排気還流弁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve chamber portion facing a valve seat having a valve hole opened in the center, a first passage portion coaxially communicating with the valve hole, and an inner end of the valve chamber portion. A valve housing having an exhaust gas recirculation passage composed of a second passage portion communicating with the valve housing, a bearing portion coaxial with the valve hole is provided, and the bearing portion extends from the drive means attached to the valve housing. The present invention relates to an exhaust gas recirculation valve for an internal combustion engine, in which a drive shaft, which is movably supported in the axial direction, is provided with a valve body that can be seated on the valve seat.
【0002】[0002]
【従来の技術】従来、かかる排気還流弁は、たとえば特
開昭53−109022号公報等により既に知られてい
る。2. Description of the Related Art Conventionally, such an exhaust gas recirculation valve is already known from, for example, Japanese Patent Laid-Open No. 53-109022.
【0003】[0003]
【発明が解決しようとする課題】かかる排気還流弁で
は、高温排気の流通に伴う温度上昇による悪影響を防止
するための冷却が必要であり、上記従来のものでは、弁
座を囲むようにして冷却水通路が弁ハウジングに設けら
れている。このため、弁座から離隔した位置に在る軸受
部の冷却が不充分となり、排気中のカーボン等が軸受部
と駆動軸との摺動部に付着し、駆動軸すなわち弁体の円
滑な作動が阻害され、寿命の低下を招くおそれもある。In such an exhaust gas recirculation valve, it is necessary to cool the exhaust gas recirculation valve in order to prevent an adverse effect due to a temperature rise accompanying the flow of the high temperature exhaust gas. In the above conventional one, the cooling water passage is formed so as to surround the valve seat. Are provided in the valve housing. For this reason, the bearing portion located away from the valve seat is insufficiently cooled, carbon in exhaust gas adheres to the sliding portion between the bearing portion and the drive shaft, and the drive shaft, that is, the valve body operates smoothly. May be hindered and the life may be shortened.
【0004】本発明は、かかる事情に鑑みてなされたも
のであり、駆動軸の円滑な摺動作動を保証して適切な排
気還流制御を可能とした内燃機関の排気還流弁を提供す
ることを目的とする。The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an exhaust gas recirculation valve for an internal combustion engine, which ensures a smooth sliding operation of a drive shaft and enables an appropriate exhaust gas recirculation control. To aim.
【0005】[0005]
【課題を解決するための手段】上記目的を達成するため
に、請求項1記載の発明は、弁孔を中央部に開口させた
弁座を臨ませた弁室部と、前記弁孔に同軸に通じる第1
通路部と、内端を弁室部に連通させた第2通路部とから
成る排気還流通路を有する弁ハウジングに、前記弁孔と
同軸の軸受部が設けられ、弁ハウジングに取付けられた
駆動手段から延設されるとともに前記軸受部で軸方向移
動可能に支承される駆動軸には前記弁座に着座可能な弁
体が設けられる内燃機関の排気還流弁において、弁ハウ
ジングには、略V字状に形成されるとともに該V字の交
点を第2通路部側に近接配置した冷却水通路が軸受部を
囲んで設けられることを特徴とする。In order to achieve the above object, the invention according to claim 1 has a valve chamber portion facing a valve seat having a valve hole opened in the central portion, and a valve chamber portion coaxial with the valve hole. First leading to
A valve housing having an exhaust gas recirculation passage including a passage portion and a second passage portion having an inner end communicating with the valve chamber portion is provided with a bearing portion coaxial with the valve hole, and the drive means is attached to the valve housing. In an exhaust gas recirculation valve of an internal combustion engine, a valve body that is seated on the valve seat is provided on a drive shaft that is extended from the drive shaft and is movably supported by the bearing portion. It is characterized in that a cooling water passage, which is formed in the shape of V and in which the intersection of the V-shape is arranged close to the second passage portion side, is provided so as to surround the bearing portion.
【0006】また請求項2記載の発明によれば、上記請
求項1記載の発明の構成に加えて、弁室部は弁孔と同軸
に形成され、冷却水通路は、略V字の交点を第2津有珠
部の弁室部への連結部に近接させて弁ハウジングに設け
られる。According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, the valve chamber portion is formed coaxially with the valve hole, and the cooling water passage has a substantially V-shaped intersection. The valve housing is provided in the vicinity of the connecting portion of the second Tsu Usu portion to the valve chamber portion.
【0007】さらに請求項3記載の発明によれば、上記
請求項1記載の発明の構成に加えて、軸受部は、弁孔と
同軸であって第2通路部の横断面積よりも大きな横断面
積を有する弁室部内に突出して弁ハウジングに設けら
れ、冷却水通路は、第2通路部および弁室部を囲んで弁
ハウジングに設けられる。Further, according to the invention of claim 3, in addition to the structure of the invention of claim 1, the bearing portion is coaxial with the valve hole and is larger in cross-sectional area than the cross-sectional area of the second passage portion. Is provided in the valve housing so as to project into the valve chamber portion having the, and the cooling water passage is provided in the valve housing so as to surround the second passage portion and the valve chamber portion.
【0008】[0008]
【実施例】以下、図面により本発明の実施例について説
明する。Embodiments of the present invention will be described below with reference to the drawings.
【0009】図1ないし図3は本発明の第1実施例を示
すものであり、図1は排気還流弁の縦断側面図、図2は
図1の2−2線断面図、図3は図2の3−3線断面図で
ある。1 to 3 show a first embodiment of the present invention. FIG. 1 is a vertical sectional side view of an exhaust gas recirculation valve, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, and FIG. FIG. 3 is a sectional view taken along line 3-3 of 2.
【0010】先ず図1および図2において、この排気還
流弁V1 は、多気筒内燃機関の吸気マニホールドMに設
けられる還流排気入口通路11と、吸気マニホールドM
に設けられる還流排気出口通路12との間で還流排気の
流量を調整すべく、吸気マニホールドMに取付けられ
る。而して前記還流排気入口通路11は機関の排気系
(図示せず)に連通され、還流排気出口通路12は、各
気筒に還流排気を分配するようにして吸気マニホールド
M内の各吸気通路(図示せず)に連通される。First, in FIGS. 1 and 2, the exhaust gas recirculation valve V 1 is a recirculation exhaust gas inlet passage 11 provided in an intake manifold M of a multi-cylinder internal combustion engine, and an intake manifold M.
It is attached to the intake manifold M in order to adjust the flow rate of the recirculation exhaust gas with the recirculation exhaust gas outlet passage 12 provided in the. Thus, the recirculation exhaust gas inlet passage 11 is communicated with an exhaust system (not shown) of the engine, and the recirculation exhaust gas outlet passage 12 distributes the recirculation exhaust gas to each cylinder so that each of the intake air passages in the intake manifold M ( (Not shown).
【0011】排気還流弁V1 の弁ハウジング131 に
は、還流排気入口通路11および還流排気出口通路12
間を結ぶ排気還流通路141 が設けられ、該排気還流通
路14 1 は、還流排気入口通路11に通じて比較的短い
距離だけ一直線状に延びる第1通路部15と、第1通路
部15と同軸である弁室部16と、外端を還流排気出口
通路12に通じさせるとともに内端を弁室部16の第1
通路部15側に連通させて第1通路部15とほぼ平行に
延びる第2通路部171 とから成る。Exhaust gas recirculation valve V1Valve housing 131To
Is the recirculation exhaust inlet passage 11 and the recirculation exhaust outlet passage 12
Exhaust gas recirculation passage 14 connecting between1Is provided and the exhaust gas recirculation passage
Road 14 1Is relatively short leading to the recirculation exhaust inlet passage 11.
A first passage portion 15 extending in a straight line for a distance, and a first passage portion
The valve chamber portion 16 which is coaxial with the portion 15 and the recirculation exhaust outlet at the outer end
The inner end of the valve chamber 16 is communicated with the passage 12 and
Communicate with the passage portion 15 side so as to be substantially parallel to the first passage portion 15.
Second passage part 17 extending1It consists of and.
【0012】弁室部16は、第1通路部15と同軸であ
って第1通路部15よりもわずかに大径の円形断面を有
するように形成されており、第1通路部15の内端に
は、弁室部16に臨んで弁座部材18が固着される。こ
の弁座部材18には、第1通路部15と同軸の弁孔19
を中央部に開口させた弁座20が弁室部16に臨んで設
けられる。The valve chamber portion 16 is formed so as to be coaxial with the first passage portion 15 and have a circular cross section with a diameter slightly larger than that of the first passage portion 15, and the inner end of the first passage portion 15 is formed. A valve seat member 18 is fixedly attached to the valve seat member 16 so as to face the valve chamber portion 16. The valve seat member 18 has a valve hole 19 coaxial with the first passage portion 15.
A valve seat 20 having a central opening is provided so as to face the valve chamber portion 16.
【0013】弁ハウジング131 には、作動軸線を弁孔
19と同軸にして弁室部16の弁座部材18とは反対側
の端部を塞ぐようにして駆動手段211 が取付けられ
る。この駆動手段211 は、弁ハウジング131 に複数
たとえば3つのねじ部材22…で締着されるケース半体
231 と、該ケース半体231 と協働してケース251
を形成すべくケース半体231 に結合されるケース半体
24と、ケース251 内をケース半体24側の負圧室2
6ならびにケース半体231 側の大気圧室27に区画す
るようにして両ケース半体231 ,24間に周縁部が挟
持されるダイヤフラム28と、負圧室26の容積を増大
させる側にダイヤフラム28を付勢するばね力を発揮し
てダイヤフラム28およびケース半体24間に縮設され
る戻しばね29と、弁孔29と同軸に延びてダイヤフラ
ム28の中央部に固定的に連結されるとともにケース半
体231 から突出せしめられる駆動軸30とを備え、駆
動軸30の一端に、弁座20に着座可能な弁体31が設
けられる。A drive means 21 1 is attached to the valve housing 13 1 so that the operation axis is coaxial with the valve hole 19 and the end of the valve chamber portion 16 opposite to the valve seat member 18 is closed. The driving means 21 1 includes a case half 23 1 which is fastened in a plurality of, for example three screws member 22 ... in the valve housing 13 1, the case half 23 1 in cooperation with the case 25 1
The case half 24 to be coupled to the case half 23 1 to form a negative pressure chamber of the casing 25 in one case half 24 side 2
6 and the diaphragm 28 whose peripheral portion is sandwiched between the case half bodies 23 1 and 24 so as to be divided into the atmospheric pressure chamber 27 on the side of the case half body 23 1 and the side where the volume of the negative pressure chamber 26 is increased. A return spring 29 that exerts a spring force for urging the diaphragm 28 and is contracted between the diaphragm 28 and the case half 24, and a return spring 29 that extends coaxially with the valve hole 29 and is fixedly connected to the central portion of the diaphragm 28. In addition, the drive shaft 30 is provided so as to project from the case half body 23 1. At one end of the drive shaft 30, a valve body 31 that can be seated on the valve seat 20 is provided.
【0014】このような駆動手段211 は、機関の吸気
系で生じる負圧が負圧室26に導入され、吸気負圧が大
であるとき、すなわち機関負荷が低いときに弁孔29の
開度を大とするようにして、排気還流弁V1 を作動せし
める。[0014] Such a driving means 21 1 is introduced into the negative pressure negative pressure chamber 26 caused by the intake system of the engine, when the intake negative pressure is large, i.e., opening of the valve hole 29 when the lower the engine load The exhaust gas recirculation valve V 1 is operated so that the degree is high.
【0015】また弁ハウジング131 のケース251 に
おけるケース半体24には、駆動軸30の軸方向作動
量、すなわち弁体31で開閉される弁孔29の開度を検
出するためのリフトセンサ32が付設される。The case half 24 of the case 25 1 of the valve housing 13 1 has a lift sensor for detecting the axial operation amount of the drive shaft 30, that is, the opening of the valve hole 29 opened and closed by the valve body 31. 32 is attached.
【0016】駆動軸30は、弁孔29と同軸にして弁ハ
ウジング131 に設けられた軸受部331 で軸方向移動
可能に支承されており、該軸受部331 は、駆動手段2
11におけるケース251 のうち弁ハウジング131 に
締着されるケース半体231と弁ハウジング131 との
間に挟持される支持部材341 に、駆動軸30を軸方向
摺動可能に貫通させる軸受材351 が支承されて成り、
弁室部16内に突出するように配設される。しかも軸受
材351 は駆動軸30の摺動性を向上させるために、た
とえばカーボンにより円筒状に形成される。The drive shaft 30 is axially movably supported by a bearing portion 33 1 provided in the valve housing 13 1 coaxially with the valve hole 29, and the bearing portion 33 1 is driven by the drive means 2.
The support member 34 1 is sandwiched between the case 25 case half 23 1 which is fastened to the inner valve housing 13 1 of 1 and the valve housing 13 1 in 1 1, the drive shaft 30 axially slidably The bearing material 35 1 to be penetrated is supported,
It is arranged so as to project into the valve chamber portion 16. Moreover, the bearing member 35 1 is formed of, for example, carbon into a cylindrical shape in order to improve the slidability of the drive shaft 30.
【0017】図3を併せて参照して、弁ハウジング13
1 には、第1および第2通路部15,171 の軸線とほ
ぼ直交する平面内で略V字状に形成されるとともに該V
字の交点PC1を、第2通路部171 の弁室部17への連
結部に近接した位置、すなわち第2通路部171 の内端
よりも軸方向内方側に配置した冷却水通路361 が軸受
部331 を囲むようにして設けられ、該冷却水通路36
1 の一端に通じる接続管371 、ならびに冷却水通路3
61 の他端に通じる接続管381 が弁ハウジング131
に接続される。而して駆動手段211 のケース251 を
弁ハウジング131 に締結するための3つのねじ部材2
2…は、冷却水通路361 の交点PC1に関して弁室部1
6と反対側に配置した1つのねじ部材22を頂点位置と
した二等辺三角形の各頂点位置にそれぞれ配置される。Referring also to FIG. 3, the valve housing 13
1 is formed in a substantially V shape in a plane substantially orthogonal to the axes of the first and second passage portions 15 and 17 1 , and
The intersection point P C1 of the character is a position close to the connecting portion of the second passage portion 17 1 to the valve chamber portion 17, that is, the cooling water passage arranged axially inward from the inner end of the second passage portion 17 1. 36 1 is provided so as to surround the bearing portion 33 1 , and the cooling water passage 36 1
Connecting pipe 37 1 leading to the first end, and a coolant passage 3
The connecting pipe 38 1 leading to the other end of the valve 6 1 has a valve housing 13 1
Connected to. Three screw member 2 for Thus to conclude the case 25 first driving means 21 1 in the valve housing 13 1
2 ..., the valve chamber with respect to the cooling water passage 36 first intersection P C1 1
6 is disposed at each vertex position of the isosceles triangle having one screw member 22 disposed on the opposite side as the vertex position.
【0018】また吸気マニホールドMには、機関本体あ
るいは他の機器に冷却水を導く導水路39が設けられて
おり、該導水路39は、排気還流弁V1 をほぼ囲むよう
にして吸気マニホールドMに設けられる。Further, the intake manifold M is provided with a water conduit 39 for guiding cooling water to the engine body or other equipment. The water conduit 39 is provided in the intake manifold M so as to substantially surround the exhaust gas recirculation valve V 1. To be
【0019】次にこの第1実施例の作用について説明す
ると、弁ハウジング131 には、略V字状に形成された
冷却水通路361 が軸受部331 を囲むようにして設け
られるので、冷却水通路361 を流通する冷却水により
軸受部331 が効率よく冷却される。しかも冷却水通路
331 がそのV字の交点PC1を第2通路部171 の弁室
部17への連結部に近接させて弁ハウジング131 に設
けられるので、第2通路部171 から軸受部331 への
熱伝導経路の途中に、冷却水通路331 のうち交点であ
ることによって比較的大面積となる部分が介在せしめら
れることになり、第2通路部171 から軸受部331 へ
の伝導熱を効果的に遮ることができ、軸受部331 の冷
却がより効果的となる。The operation of the first embodiment will now be described. Since the valve housing 13 1 is provided with a cooling water passage 36 1 formed in a substantially V shape so as to surround the bearing portion 33 1 , the cooling water is cooled. The bearing 33 1 is efficiently cooled by the cooling water flowing through the passage 36 1 . Moreover, since the cooling water passage 33 1 is provided in the valve housing 13 1 with its V-shaped intersection P C1 being close to the connecting portion of the second passage portion 17 1 to the valve chamber portion 17, the second passage portion 17 1 A portion of the cooling water passage 33 1 having a relatively large area due to the intersection is interposed in the middle of the heat conduction path to the bearing portion 33 1 , so that from the second passage portion 17 1 to the bearing portion 33 1. The conduction heat to 1 can be shielded effectively, and the cooling of the bearing portion 33 1 becomes more effective.
【0020】これにより、排気中のカーボン等が軸受部
331 と駆動軸30との摺動部に付着することを極力防
止して、駆動軸30すなわち弁体31の円滑な作動を確
保して適切な排気還流制御を行なうことができ、寿命の
延長をも図ることができる。また排気中のガス成分と軸
受材351 との化学反応を軸受部331 の効果的な冷却
により抑制することが可能であり、それに伴い軸受材3
51 の化学反応による劣化を防止し、軸受材351 の特
性を充分に発揮させることができる。特に軸受材351
をカーボン製としたときには充分な摺動性を得ることが
できる。[0020] Thus, carbon and the like in the exhaust gas is prevented as much as possible from adhering to the sliding portion of the bearing portion 33 1 and the drive shaft 30, drive shaft 30 that is, ensuring the smooth operation of the valve member 31 Appropriate exhaust gas recirculation control can be performed, and the service life can be extended. Further, it is possible to suppress the chemical reaction between the gas component in the exhaust gas and the bearing material 35 1 by effective cooling of the bearing portion 33 1 , and accordingly, the bearing material 3 1.
It is possible to prevent the deterioration of 5 1 due to the chemical reaction and to fully exhibit the characteristics of the bearing material 35 1 . Especially bearing material 35 1
When is made of carbon, sufficient slidability can be obtained.
【0021】また軸受部331 を弁室部16内に配置す
ることにより、弁座20と駆動手段211 間の距離を比
較的短くし、排気還流弁V1 の小型化を図ることができ
るとともに、駆動手段211 、弁座20および弁体31
の効果的な冷却も可能となり、寿命の向上をより図るこ
とができる。さらに、冷却水通路361 が単純なV字状
であることから、冷却水通路361 の形成加工が容易と
なる。By disposing the bearing portion 33 1 in the valve chamber portion 16, the distance between the valve seat 20 and the driving means 21 1 can be made relatively short, and the exhaust gas recirculation valve V 1 can be miniaturized. Together with the drive means 21 1 , the valve seat 20 and the valve body 31
Can be effectively cooled, and the life can be further improved. Further, since the cooling water passage 36 1 has a simple V shape, the cooling water passage 36 1 can be easily formed.
【0022】しかも排気還流弁V1 が、吸気マニホール
ドMに設けられた導水路39でほぼ囲まれることによっ
て、排気還流弁V1 全体の冷却を図ることも可能であ
る。Moreover, since the exhaust gas recirculation valve V 1 is substantially surrounded by the water conduit 39 provided in the intake manifold M, it is possible to cool the entire exhaust gas recirculation valve V 1 .
【0023】図4は本発明の第2実施例を示すものであ
り、上記第1実施例に対応する部分には同一の参照符号
を付す。FIG. 4 shows a second embodiment of the present invention, in which parts corresponding to those in the first embodiment are designated by the same reference numerals.
【0024】排気還流弁V2 において、駆動軸30を軸
方向移動可能に支承して弁ハウジング131 に設けられ
た軸受部332 は、ケース半体231 と弁ハウジング1
31との間に挟持される支持部材342 に、駆動軸30
を軸方向摺動可能に貫通させる軸受材352 が支承され
て成り、支持部材342 は、その軸受材352 を支承す
る部分の外面が弁室部16の内面に接触する程度に形成
される。In the exhaust gas recirculation valve V 2 , the bearing portion 33 2 provided on the valve housing 13 1 for supporting the drive shaft 30 movably in the axial direction is the case half body 23 1 and the valve housing 1.
3 1 to the support member 34 2 which is interposed between the drive shaft 30
A bearing member 35 2 that allows the bearing member 35 2 to axially slidably penetrate therethrough, and the support member 34 2 is formed such that the outer surface of the portion that supports the bearing member 35 2 contacts the inner surface of the valve chamber portion 16. It
【0025】このようにすると、弁ハウジング131 に
設けられている冷却水通路361 からの軸受部332 の
冷却がより効果的に行なわれることになる。By doing so, the cooling of the bearing 33 2 from the cooling water passage 36 1 provided in the valve housing 13 1 can be performed more effectively.
【0026】図5および図6は本発明の第3実施例を示
すものであり、上記各実施例に対応する部分には同一の
参照符号を付す。FIG. 5 and FIG. 6 show a third embodiment of the present invention, and the portions corresponding to the respective embodiments described above are designated by the same reference numerals.
【0027】排気還流弁V3 の弁ハウジング132 に設
けられる排気還流通路142 は、還流排気入口通路11
に通じて比較的短い距離だけ一直線状に延びる第1通路
部15と、第1通路部15と同軸である弁室部16と、
外端を還流排気出口通路12に通じさせるとともに内端
を弁室部16の中間部に連通させて第1通路部15とほ
ぼ平行に延びる第2通路部172 とから成る。The exhaust gas recirculation passage 14 2 provided in the valve housing 13 2 of the exhaust gas recirculation valve V 3 is a recirculation exhaust gas inlet passage 11
A first passage portion 15 that extends in a straight line for a relatively short distance through the valve chamber portion 16, and a valve chamber portion 16 that is coaxial with the first passage portion 15,
It has a second passage portion 17 2 whose outer end communicates with the recirculation exhaust outlet passage 12 and whose inner end communicates with the intermediate portion of the valve chamber portion 16 and which extends substantially parallel to the first passage portion 15.
【0028】弁ハウジング132 には、上記各実施例の
駆動手段211 と基本的に同一の構成ではあるが、ケー
ス252 をケース半体24とともに構成するケース半体
23 2 の形状がわずかに異なる駆動手段212 が3本の
ねじ部材22…により取付けられており、該駆動手段2
12 から延設される駆動軸30を軸方向移動可能に支承
する軸受部331 は、弁室部16内に突出するようにし
てケース半体232 および弁ハウジング132 間に挟持
される。而して弁室部16の横断面積は軸受部331 の
存在により、流通面積を確保するために比較的大径とな
るものであり、第2通路部172 は、弁室部16よりも
小径の横断面積を有し、その内端を弁室部16の中間部
に通じさせるようにして弁ハウジング132 に設けられ
る。Valve housing 132In each of the above examples,
Drive means 211The configuration is basically the same as
Space 252Halves forming the halves with the halves 24
23 2Drive means 21 having slightly different shapes2Of three
The driving means 2 is attached by screw members 22 ...
12The drive shaft 30 extending from the shaft is supported so as to be movable in the axial direction.
Bearing part 331So as to project into the valve chamber portion 16.
Case half 232And valve housing 132Sandwiched between
To be done. Thus, the cross-sectional area of the valve chamber portion 16 is the bearing portion 33.1of
Due to its existence, it has a relatively large diameter to secure the distribution area.
The second passage portion 172Is more than the valve chamber 16
It has a small-diameter cross-sectional area and its inner end is the middle part of the valve chamber part 16.
Valve housing 13 so that2Provided in
It
【0029】弁ハウジング131 には、第1および第2
通路部15,171 の軸線とほぼ直交する平面内で略V
字状に形成されるとともに該V字の交点PC2を第2通路
部172 側に配置した冷却水通路362 が、軸受部33
1 にほぼ対応する位置で第2通路部171 および弁室部
16を囲むようにして設けられ、該冷却水通路362の
一端に通じる接続管372 、ならびに冷却水通路362
の他端に通じる接続管382 が弁ハウジング132 に接
続される。The valve housing 13 1 has a first and a second
Approximately V in the plane substantially orthogonal to the axis of the passage portions 15 and 17 1.
Coolant passage 36 is formed in a shape to place the intersection point P C2 of the V-shaped to the second passage portion 17 2 side 2, a bearing portion 33
The second passage portion 17 at a position substantially corresponding to the 1 1 and provided so as to surround the valve chamber 16, connection tube 37 2 leading to one end of the coolant passage 36 2 and the cooling water passage 36 2,
A connecting pipe 38 2 leading to the other end of the valve is connected to the valve housing 13 2 .
【0030】この第3実施例によると、弁ハウジング1
32 には、第1および第2通路部15,171 の軸線と
ほぼ直交する平面内で略V字状に形成された冷却水通路
36 2 が、弁室部16よりも小径である第2通路部17
2 側に交点PC2を配置して第1通路部172 および弁室
部16を囲むようにして設けられるので、冷却水通路3
62 を弁室部16および第2通路部172 により近接さ
せることができ、弁室部16内に配置された軸受部33
1 を冷却水通路362 を流通する冷却水によって効率よ
く冷却することが可能となるとともに、冷却水通路36
2 を弁ハウジング132 に配置するスペースを比較的小
さくして排気還流弁V3 の小型化に寄与することができ
る。According to this third embodiment, the valve housing 1
Three2The first and second passage portions 15, 171With the axis of
Cooling water passage formed in a substantially V shape in a plane that is substantially orthogonal
36 2However, the second passage portion 17 having a smaller diameter than the valve chamber portion 16
2Intersection P on the sideC2First passage part 172And valve chamber
The cooling water passage 3 is provided so as to surround the portion 16.
62The valve chamber portion 16 and the second passage portion 172Closer to
And a bearing portion 33 disposed inside the valve chamber portion 16.
1The cooling water passage 362The cooling water that flows through the
Cooling is possible, and the cooling water passage 36
2The valve housing 132Relatively small space to place
Exhaust recirculation valve V3Can contribute to the miniaturization of
It
【0031】図7は本発明の第4実施例を示すものであ
り、上記各実施例に対応する部分には同一の参照符号を
付す。FIG. 7 shows a fourth embodiment of the present invention, and the portions corresponding to the respective embodiments described above are designated by the same reference numerals.
【0032】排気還流弁V4 の弁ハウジング133 に
は、図1ないし図3の第1実施例と同様の排気還流通路
141 が設けられる。また排気還流通路141 における
第1および第2通路部15,171 の軸線と交差する平
面内で略V字状に形成されるとともに該V字の交点PC3
を第2通路部171 側に配置した冷却水通路363 が、
軸受部331 にほぼ対応する位置で第2通路部172 お
よび弁室部16を囲むようにして設けられる。しかも冷
却水通路363 は、上記第1ないし第3実施例の如く冷
却水通路361 ,362 がほぼ水平に設けられたものと
は異なり、交点P C3側に向かうにつれて下方位置となる
ように傾斜した平面内で略V字状に形成されるものであ
る。Exhaust gas recirculation valve VFourValve housing 133To
Is an exhaust gas recirculation passage similar to that of the first embodiment shown in FIGS.
141Is provided. In addition, the exhaust gas recirculation passage 141In
First and second passage portions 15, 171Flat intersecting the axis of
It is formed in a substantially V shape in the plane and the intersection P of the V shape is formed.C3
The second passage portion 171Side cooling water passage 363But,
Bearing part 331The second passage portion 17 at a position substantially corresponding to2Oh
It is provided so as to surround the valve chamber portion 16. Moreover, it is cold
Wastewater passage 363Is the same as in the first to third embodiments.
Wastewater passage 361, 362Is installed almost horizontally
Is different, intersection P C3The position becomes lower as it goes to the side
Is formed in a substantially V-shape in the inclined plane.
It
【0033】この第4実施例によると、上記第3実施例
の効果に加えて、冷却水通路363内に気泡が滞留する
ことを防止して、冷却水通路363 内での冷却水の円滑
な流通を保証することができる。[0033] According to the fourth embodiment, in addition to the effects of the third embodiment, it is possible to prevent bubbles from staying in the coolant passage 36 3, the cooling water in the cooling water passage 36 within 3 It is possible to guarantee smooth distribution.
【0034】本発明のさらに他の実施例として、第1な
いし第3実施例における冷却水通路361 ,362 を、
接続管371 ,372 ;381 ,382 側を上方位置と
し、交点PC1,PC2が最下方位置となるようにして略V
字状に形成し、冷却水通路361 ,362 内に気泡が滞
留することを防止するようにしてもよく、その際、接続
管371 ,372 側の位置と、接続管381 ,382 側
の位置とが上下にわずかにずれるようにしてもよい。As still another embodiment of the present invention, the cooling water passages 36 1 and 36 2 in the first to third embodiments are
The connecting pipes 37 1 and 37 2 ; 38 1 and 38 2 are set to the upper position, and the intersections P C1 and P C2 are set to the lowermost position, which is approximately V.
It may be formed in a character shape to prevent air bubbles from staying in the cooling water passages 36 1 and 36 2 , and at that time, the positions on the side of the connection pipes 37 1 and 37 2 and the connection pipes 38 1 and The position on the 38 2 side may be slightly shifted vertically.
【0035】以上、本発明の実施例を詳述したが、本発
明は上記実施例に限定されるものではなく、特許請求の
範囲に記載された本発明を逸脱することなく種々の設計
変更を行なうことが可能である。Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. It is possible to do.
【0036】[0036]
【発明の効果】以上のように請求項1記載の発明によれ
ば、弁ハウジングには、略V字状に形成されるとともに
該V字の交点を第2通路部側に近接配置した冷却水通路
が軸受部を囲んで設けられるので、冷却水通路を流通す
る冷却水により軸受部を効率よく冷却し、排気中のカー
ボン等が軸受部と駆動軸との摺動部に付着することを極
力防止して円滑な作動を確保し、適切な排気還流制御を
行なうことができるとともに寿命の延長を図ることがで
き、しかも冷却水通路の形成を容易とすることができ
る。As described above, according to the first aspect of the invention, the cooling water is formed in the valve housing in a substantially V shape, and the intersection of the V shape is arranged close to the second passage portion side. Since the passage is provided around the bearing, the bearing can be efficiently cooled by the cooling water flowing through the cooling water passage, and carbon in the exhaust gas can be attached to the sliding portion between the bearing and the drive shaft as much as possible. Therefore, it is possible to prevent and secure smooth operation, perform appropriate exhaust gas recirculation control, extend the life, and facilitate the formation of the cooling water passage.
【0037】また請求項2記載の発明によれば、上記請
求項1記載の発明の構成に加えて、弁室部は弁孔と同軸
に形成され、冷却水通路は、略V字の交点を第2通路部
の弁室部への連結部に近接させて弁ハウジングに設けら
れるので、冷却水通路のうち交点であることによって比
較的大面積となる部分で、第2通路部から軸受部への伝
導熱を効果的に遮って軸受部をより効果的に冷却するこ
とができる。According to the invention of claim 2, in addition to the structure of the invention of claim 1, the valve chamber portion is formed coaxially with the valve hole, and the cooling water passage has a substantially V-shaped intersection. Since it is provided in the valve housing in the vicinity of the connecting portion of the second passage portion to the valve chamber portion, the portion of the cooling water passage having a relatively large area due to the intersection point, the second passage portion to the bearing portion. It is possible to effectively shield the conduction heat of the above and cool the bearing portion more effectively.
【0038】さらに請求項3記載の発明によれば、上記
請求項1記載の発明の構成に加えて、軸受部は、弁孔と
同軸であって第2通路部の横断面積よりも大きな横断面
積を有する弁室部内に突出して弁ハウジングに設けら
れ、冷却水通路は、第2通路部および弁室部を囲んで弁
ハウジングに設けられるので、冷却水通路を弁室部およ
び第2通路部により近接させて軸受部を効率よく冷却す
ることが可能となるとともに、冷却水通路を弁ハウジン
グに配置するスペースを比較的小さくして排気還流弁の
小型化に寄与することができ、さらに軸受部を弁室部内
に配置することにより、駆動手段、弁座および弁体の効
果的な冷却を可能として寿命の向上をより図るとともに
排気還流弁をより小型化することが可能となる。According to the invention of claim 3, in addition to the structure of the invention of claim 1, the bearing portion is coaxial with the valve hole and is larger in cross-sectional area than the cross-sectional area of the second passage portion. Is provided in the valve housing so as to project into the valve chamber portion having the, and the cooling water passage is provided in the valve housing so as to surround the second passage portion and the valve chamber portion. It is possible to efficiently cool the bearing portion by bringing them close to each other, and to relatively reduce the space for arranging the cooling water passage in the valve housing, which can contribute to downsizing of the exhaust gas recirculation valve. By arranging it in the valve chamber portion, it becomes possible to effectively cool the drive means, the valve seat and the valve element, to further improve the life, and to further reduce the size of the exhaust gas recirculation valve.
【図1】第1実施例の排気還流弁の縦断側面図である。FIG. 1 is a vertical sectional side view of an exhaust gas recirculation valve according to a first embodiment.
【図2】図1の2−2線断面図である。FIG. 2 is a sectional view taken along line 2-2 of FIG.
【図3】図2の3−3線断面図である。FIG. 3 is a sectional view taken along line 3-3 of FIG.
【図4】第2実施例の排気還流弁の縦断側面図である。FIG. 4 is a vertical sectional side view of an exhaust gas recirculation valve according to a second embodiment.
【図5】第3実施例の排気還流弁の縦断側面図である。FIG. 5 is a vertical sectional side view of an exhaust gas recirculation valve according to a third embodiment.
【図6】図5の6−6線断面図である。6 is a sectional view taken along line 6-6 of FIG.
【図7】第4実施例の排気還流弁の縦断側面図である。FIG. 7 is a vertical sectional side view of an exhaust gas recirculation valve according to a fourth embodiment.
131 ,132 ,133 ・・・弁ハウジング 141 ,142 ・・・排気還流通路 15・・・第1通路部 16・・・弁室部 171 ,172 ・・・第2通路部 19・・・弁孔 20・・・弁座 211 ,212 ・・・駆動手段 30・・・駆動軸 31・・・弁体 331 ,332 ・・・軸受部 361 ,362 ,363 ・・・冷却水通路 PC1,PC2,PC3・・・交点 V1 ,V2 ,V3 ,V4 ・・・排気還流弁13 1 , 13 2 , 13 3 ... Valve housing 14 1 , 14 2 ... Exhaust gas recirculation passage 15 ... First passage portion 16 ... Valve chamber portion 17 1 , 17 2 ... Second passage Part 19 ... Valve hole 20 ... Valve seat 21 1 , 21 2 ... Driving means 30 ... Drive shaft 31 ... Valve body 33 1 , 33 2 ... Bearing part 36 1 , 36 2 , 36 3 ... coolant passage P C1, P C2, P C3 ··· intersection V 1, V 2, V 3 , V 4 ··· EGR valve
Claims (3)
(20)を臨ませた弁室部(16)と、前記弁孔(1
9)に同軸に通じる第1通路部(15)と、内端を弁室
部(16)に連通させた第2通路部(171 ,172 )
とから成る排気還流通路(141 ,142 )を有する弁
ハウジング(131 ,132 ,133 )に、前記弁孔
(19)と同軸の軸受部(331 ,332 )が設けら
れ、弁ハウジング(131 ,132 ,133 )に取付け
られた駆動手段(211 ,212 )から延設されるとと
もに前記軸受部(331 ,332 )で軸方向移動可能に
支承される駆動軸(30)には前記弁座(20)に着座
可能な弁体(31)が設けられる内燃機関の排気還流弁
において、弁ハウジング(131 ,132 ,133 )に
は、略V字状に形成されるとともに該V字の交点
(PC1,PC2,PC3)を第2通路部(171 ,172 )
側に近接配置した冷却水通路(361 ,362 ,3
63)が軸受部(331 ,332 )を囲んで設けられる
ことを特徴とする内燃機関の排気還流弁。1. A valve chamber portion (16) facing a valve seat (20) having a valve hole (19) opened in the center thereof, and the valve hole (1).
9) the first passage portion (15) coaxially communicating with the second passage portion (17 1 , 17 2 ) whose inner end communicates with the valve chamber portion (16).
A bearing portion (33 1 , 33 2 ) coaxial with the valve hole (19) is provided in a valve housing (13 1 , 13 2 , 13 3 ) having an exhaust gas recirculation passageway (14 1 , 14 2 ). , Extending from drive means (21 1 , 21 2 ) attached to the valve housings (13 1 , 13 2 , 13 3 ) and movably supported by the bearing portions (33 1 , 33 2 ) in the axial direction. In an exhaust gas recirculation valve of an internal combustion engine in which a valve body (31) which can be seated on the valve seat (20) is provided on a drive shaft (30), the valve housing (13 1 , 13 2 , 13 3 ) is It is formed in a V shape and the intersections (P C1 , P C2 , P C3 ) of the V shape are connected to the second passage portion (17 1 , 17 2 ).
Side cooling water passages (36 1 , 36 2 , 3
An exhaust gas recirculation valve for an internal combustion engine, characterized in that 6 3 ) is provided so as to surround the bearing portions (33 1 , 33 2 ).
形成され、冷却水通路(361 )は、略V字の交点(P
C1)を、第2通路部(171 )の弁室部(17)への連
結部に近接させて弁ハウジング(131 )に設けられる
ことを特徴とする請求項1記載の内燃機関の排気還流
弁。2. The valve chamber (16) is formed coaxially with the valve hole (19), and the cooling water passage (36 1 ) has a substantially V-shaped intersection (P).
The exhaust gas of an internal combustion engine according to claim 1, characterized in that C1 ) is provided in the valve housing (13 1 ) close to a connecting portion of the second passage portion (17 1 ) to the valve chamber portion (17). Reflux valve.
軸であって第2通路部(171 ,172 )の横断面積よ
りも大きな横断面積を有する弁室部(16)内に突出し
て弁ハウジング(132 ,133 )に設けられ、冷却水
通路(362,363 )は、第2通路部(171 ,17
2 )および弁室部(16)を囲んで弁ハウジング(13
2 ,133 )に設けられることを特徴とする請求項1記
載の内燃機関の排気還流弁。3. The bearing chamber (33 1 ) is coaxial with the valve hole (19) and has a cross sectional area larger than the cross sectional area of the second passage portions (17 1 , 17 2 ). The cooling water passages (36 2 , 36 3 ) are provided in the valve housings (13 2 , 13 3 ) so as to project inward, and the second passage portions (17 1 , 17 3
2 ) and the valve chamber part (16) surrounding the valve housing (13
2, 13 3) exhaust gas recirculation valve of an internal combustion engine according to claim 1, characterized in that provided on.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6048758A JPH07259660A (en) | 1994-03-18 | 1994-03-18 | Exhaust gas recirculating valve of internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6048758A JPH07259660A (en) | 1994-03-18 | 1994-03-18 | Exhaust gas recirculating valve of internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07259660A true JPH07259660A (en) | 1995-10-09 |
Family
ID=12812185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6048758A Pending JPH07259660A (en) | 1994-03-18 | 1994-03-18 | Exhaust gas recirculating valve of internal combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07259660A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0763655A3 (en) * | 1995-09-13 | 1998-01-07 | Honda Giken Kogyo Kabushiki Kaisha | Structure for supporting EGR valve in engine |
JP2010024872A (en) * | 2008-07-16 | 2010-02-04 | Aisan Ind Co Ltd | Flow path selector valve |
CN104088729A (en) * | 2014-07-09 | 2014-10-08 | 无锡隆盛科技股份有限公司 | Electric EGR valve with cooling structure |
-
1994
- 1994-03-18 JP JP6048758A patent/JPH07259660A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0763655A3 (en) * | 1995-09-13 | 1998-01-07 | Honda Giken Kogyo Kabushiki Kaisha | Structure for supporting EGR valve in engine |
JP2010024872A (en) * | 2008-07-16 | 2010-02-04 | Aisan Ind Co Ltd | Flow path selector valve |
CN104088729A (en) * | 2014-07-09 | 2014-10-08 | 无锡隆盛科技股份有限公司 | Electric EGR valve with cooling structure |
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