JPH07259660A - Exhaust gas recirculating valve of internal combustion engine - Google Patents

Exhaust gas recirculating valve of internal combustion engine

Info

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
Application number
JP6048758A
Other languages
Japanese (ja)
Inventor
Satoyuki Numata
智行 沼田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP6048758A priority Critical patent/JPH07259660A/en
Publication of JPH07259660A publication Critical patent/JPH07259660A/en
Pending legal-status Critical Current

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

PURPOSE:To ensure smooth sliding operation of a driving shaft by providing a cooling water passage formed substantially like a V-shape, with the intersecting point of the V-shape disposed close to a second passage part side in such a manner as to surround a bearing part on a valve housing having an exhaust gas circulating passage. CONSTITUTION:An exhaust gas circulating valve V includes a valve chest part 16 where a valve seat 20 having a valve hole 19 opened in the central part thereof faces, and a valve housing 13 provided with an exhaust gas circulating passage 14 comprising a first passage part 15 coaxially communicating with the valve hole 19, and a second passage part 171, the inner end of which communicates with the valve chest part 16. A valve element 31 which can be seated on the valve seat 20 is provided on a driving shaft 30 which is extended from a driving means 211 and supported in such a manner as to be moved in the axial direction by a bearing part 331. In this case, a cooling water passage 361 formed substantially like a V-shape, with the intersecting point Pc1 of the V-shape disposed close to the second passage part 17 side is provided in such a manner as to surround the bearing part 331 on the valve housing 131. Thus, the bearing part 33 is suitably cooled to heighten controllability.

Description

【発明の詳細な説明】Detailed Description of the Invention

【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.

【図面の簡単な説明】[Brief description of drawings]

【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.

【符号の説明】[Explanation of symbols]

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)

【特許請求の範囲】[Claims] 【請求項１】 弁孔（１９）を中央部に開口させた弁座
（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 ). 【請求項２】 弁室部（１６）は弁孔（１９）と同軸に
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. 【請求項３】 軸受部（３３1 ）は、弁孔（１９）と同
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.
JP6048758A 1994-03-18 1994-03-18 Exhaust gas recirculating valve of internal combustion engine Pending JPH07259660A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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