WO2022064543A1 - Dispositif de soupape - Google Patents

Dispositif de soupape Download PDF

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Publication number
WO2022064543A1
WO2022064543A1 PCT/JP2020/035667 JP2020035667W WO2022064543A1 WO 2022064543 A1 WO2022064543 A1 WO 2022064543A1 JP 2020035667 W JP2020035667 W JP 2020035667W WO 2022064543 A1 WO2022064543 A1 WO 2022064543A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide member
housing
shaft portion
flow path
valve
Prior art date
Application number
PCT/JP2020/035667
Other languages
English (en)
Japanese (ja)
Inventor
克典 高井
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2022545013A priority Critical patent/JP7146149B2/ja
Priority to PCT/JP2020/035667 priority patent/WO2022064543A1/fr
Publication of WO2022064543A1 publication Critical patent/WO2022064543A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/67—Pintles; Spindles; Springs; Bearings; Sealings; Connections to actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/74—Protection from damage, e.g. shielding means

Definitions

  • valve device is used for flow rate control.
  • a valve device is disclosed in, for example, Patent Document 1.
  • the valve device disclosed in Patent Document 1 controls the flow rate of gas flowing through the flow path provided in the lower part of the housing by adjusting the opening degree of a valve that can move directly. .. Therefore, in the valve device disclosed in Patent Document 1, a bearing portion that supports the valve so as to be reciprocally movable in the axial direction is arranged above the flow path. Further, the bearing portion is provided with a seal member (gas seal). This sealing member prevents gas from leaking from the bearing portion into the atmosphere.
  • the flow path 11a forms a part of the EGR passage.
  • the EGR gas which is a fluid, flows through the flow path 11a.
  • the arrow G in FIG. 1 indicates the flow of EGR gas.
  • a valve 12, which will be described later, can be seated on the valve seat 11b.
  • the through hole 11c penetrates the housing 11 in the vertical direction.
  • the through hole 11c is a hole through which the shaft portion 12b of the valve 12, which will be described later, penetrates.
  • valve body 12a is seated on the valve seat 11b by the shaft portion 12b moving downward. Further, the valve body 12a is separated from the valve seat 11b by the shaft portion 12b moving upward.
  • the bush 15 is provided at the upper end of the through hole 11c.
  • the bush 15 together with the bush 31 of the bearing portion 30 described later supports the shaft portion 12b of the valve 12 so as to be reciprocally movable in the axial direction thereof.
  • the output shaft 16a is arranged coaxially with the valve 12.
  • the upper end of the output shaft 16a can come into contact with the lower end of the shaft portion 12b. Therefore, the motor 16 can attach and detach the valve body 12a to and from the valve seat 11b by reciprocating the output shaft 16a in the axial direction thereof.
  • the motor 16 is fixed to the housing 11 via the motor support member 17.
  • the motor support member 17 has a stepped cylindrical shape with a tapered upper end side.
  • the motor 16 is inserted and fixed to the inner peripheral surface of the motor support member 17 from the lower end side thereof. As described above, the motor 16 is inserted into the motor support member 17 fixed to the housing 11, so that the output shaft 16a thereof becomes coaxial with the shaft portion 12b.
  • the motor side seal member 18 is formed in an annular shape and in a bellows shape. Further, the motor-side seal member 18 is provided between the upper end of the output shaft 16a and the upper end of the motor support member 17, and seals between them. Therefore, the motor-side seal member 18 expands and contracts with the reciprocating movement of the output shaft 16a in the axial direction, and can always prevent water from entering the motor 16 side from the housing 11 side.
  • the connector 19 is electrically connected to the lower end of the motor 16.
  • the connector 19 supplies the drive power sent from an external power source (not shown) to the motor 16.
  • the cover member 20 protects the motor 16 and the connector 19.
  • the cover member 20 covers the motor 16 and the connector 19 from their sides. Further, the cover member 20 is supported by the lower end of the motor support member 17.
  • the motor 16 is supported by the motor support member 17 in a state of penetrating the upper plate of the cover member 20.
  • the bearing portion 30 will be described in detail with reference to FIGS. 1 to 6.
  • the arrows W in FIGS. 2 and 6 indicate the flow of condensed water. Further, the arrow WV in FIG. 2 indicates the flow of water vapor in which the condensed water is vaporized.
  • the bearing portion 30 is provided in the housing 11 below the flow path 11a.
  • the bearing portion 30 includes a bush 31, an O-ring 32, a guide member 33, an upper shape holding member 34, a lower shape holding member 35, a seal member 36, and a holding member 37.
  • the bush 31, O-ring 32, upper shape holding member 34, guide member 33, lower shape holding member 35, seal member 36, and holding member 37 are arranged in order from above to below.
  • the bush 31 is inserted into the housing 11.
  • the bush 31 is pressed into the housing 11 by, for example, the reaction force of the O-ring. Further, the bush 31 supports the shaft portion 12b of the valve 12 so as to be reciprocally movable in the axial direction thereof.
  • the guide member 33 is provided below the flow path 11a in the housing 11 and above the seal member 36 described later. Further, the guide member 33 is formed so as to gradually incline downward from the inner peripheral end to the outer peripheral end. Therefore, the guide member 33 guides the condensed water that has entered between the through hole 11c and the shaft portion 12b from the flow path 11a toward the radial outer side of the bearing portion 30.
  • the guide member 33 is made of, for example, a fluororesin material, and has a central hole 33a, an upward inclined surface 33b, and a downward inclined surface 33c.
  • the central hole 33a forms the inner peripheral end.
  • the shaft portion 12b of the valve 12 penetrates through the central hole 33a.
  • the entire circumference of the central hole 33a is slidably in contact with the outer peripheral surface of the shaft portion 12b. Therefore, the entire circumference of the central hole 33a is always in close contact with the outer peripheral surface of the shaft portion 12b even if the shaft portion 12b reciprocates in the axial direction. Therefore, the condensed water dropped from the flow path 11a between the through hole 11c and the shaft portion 12b does not enter between the entire circumference of the central hole 33a and the outer peripheral surface of the shaft portion 12b, and the upward inclined surface described later. It flows onto 33b.
  • the upper inclined surface 33b constitutes the upper surface of the guide member 33.
  • the upper inclined surface 33b is gradually inclined downward in the guide member 33 from the inner peripheral end to the outer peripheral end. Therefore, the upper inclined surface 33b can guide the condensed water that has flowed in toward the radial outer side of the bearing portion 30.
  • the downward inclined surface 33c constitutes the lower surface of the guide member 33.
  • the downward inclined surface 33c is gradually inclined downward in the guide member 33 from the inner peripheral end to the outer peripheral end.
  • the upper shape holding member 34 is provided on the upper side of the guide member 33 in the housing 11.
  • the upper shape holding member 34 faces the upper inclined surface 33b of the guide member 33. That is, the upper shape holding member 34 is fixed to the housing 11 so as to cover the guide member 33 from above. Further, the upper shape holding member 34 has an annular shape. Therefore, even if the shaft portion 12b reciprocates in the axial direction, the upper shape holding member 34 retains the shape of the guide member 33 that is in close contact with the shaft portion 12b, and the guide member 33 is greatly deformed. It can be suppressed.
  • Such an upper shape holding member 34 is made of, for example, a metal material, and has a central hole 34a, a lower inclined surface 34b, an opening 34c, and a fitting protrusion 34d.
  • the shaft portion 12b of the valve 12 penetrates the central hole 34a.
  • the downward inclined surface 34b is a surface facing downward of the upper shape holding member 34.
  • the downward inclined surface 34b is gradually inclined downward from the central hole 34a toward the outer side in the radial direction.
  • the lower inclined surface 34b faces the upper inclined surface 33b of the guide member 33 in the vertical direction. Therefore, the lower inclined surface 34b can suppress the deformation of the upper inclined surface 33b even if the shaft portion 12b reciprocates in the axial direction thereof. Further, the lower inclined surface 34b can guide the condensed water to the radial outer side of the bearing portion 30 with the upper inclined surface 33b.
  • the opening 34c is open on the outer peripheral surface of the upper shape holding member 34.
  • the opening 34c communicates with the central hole 34a and the downward inclined surface 34b. Therefore, the upper shape holding member 34 guides the condensed water that has entered between the through hole 11c and the shaft portion 12b from the flow path 11a toward the opening 34c through the central hole 34a and the downward inclined surface 34b. can do.
  • the shaft portion 12b of the valve 12 penetrates the central hole 35a.
  • the upper inclined surface 35b is a surface facing upward of the lower shape holding member 35 and constitutes a support surface.
  • the upper inclined surface 35b is gradually inclined downward from the central hole 35a toward the outer side in the radial direction. Further, the upper inclined surface 35b supports the lower inclined surface 33c of the guide member 33 from below. Therefore, the upper inclined surface 35b can suppress the deformation of the lower inclined surface 33c even if the shaft portion 12b reciprocates in the axial direction.
  • the fitting recess 35e is provided at the upper end of the lower shape holding member 35.
  • the fitting recess 35e is recessed downward from the upper end thereof. Further, the fitting recess 35e can be fitted with the fitting protrusion 34d of the upper shape holding member 34.
  • the seal member 36 is provided on the lower side of the flow path 11a in the housing 11. Further, the seal member 36 has a cylindrical shape. The outer peripheral surface of the seal member 36 is fixed to the inner peripheral surface of the lower shape holding member 35. On the other hand, the inner peripheral surface of the seal member 36 is in close contact with the outer peripheral surface of the shaft portion 12b to seal between the inner peripheral surface and the outer peripheral surface. Therefore, the seal member 36 can prevent the EGR gas that has entered between the through hole 11c and the shaft portion 12b from the flow path 11a from leaking from the bearing portion 30.
  • the housing 11 has a water reservoir portion 11d and a drainage passage 11e.
  • the drainage passage 11e communicates between the flow path 11a and the water reservoir 11d. Therefore, the drainage passage 11e can release the steam vaporized by the condensed water accumulated in the water reservoir 11d into the passage 11a.
  • the condensed water becomes steam when the valve device is warmed by, for example, the heat generated by the engine.
  • FIG. 1 is not an example showing a configuration in which the drainage passage 11e directly communicates with the flow path 11a, but an example showing a configuration in which the drainage passage 11e communicates with the flow path 11a via the through hole 11c. Is.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Lift Valve (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

L'invention concerne un dispositif de soupape comprenant : un logement (11) pourvu d'une voie d'écoulement (11a) pour l'écoulement d'un gaz EGR à l'intérieur de celle-ci ; une soupape (12) supportée par le logement (11) de manière à pouvoir effectuer un mouvement de va-et-vient et d'ouverture/fermeture de la voie d'écoulement (11a) ; un élément d'étanchéité (36) disposé sur le côté inférieur de la voie d'écoulement (11a) du logement (11) et mis en contact étroit avec une partie arbre (12b) de la soupape (12) de sorte que la partie arbre (12b) et l'élément d'étanchéité sont scellés ; et un élément de guidage (33) disposé sur le côté inférieur de la voie d'écoulement (11a) du logement (11) et le côté supérieur de l'élément d'étanchéité (36) et incliné graduellement vers le bas lorsque l'élément de guidage (33) s'étend depuis l'extrémité de périphérie interne en contact étroit avec la partie arbre de pénétration (12b) vers l'extrémité périphérique externe.
PCT/JP2020/035667 2020-09-23 2020-09-23 Dispositif de soupape WO2022064543A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2022545013A JP7146149B2 (ja) 2020-09-23 2020-09-23 バルブ装置
PCT/JP2020/035667 WO2022064543A1 (fr) 2020-09-23 2020-09-23 Dispositif de soupape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/035667 WO2022064543A1 (fr) 2020-09-23 2020-09-23 Dispositif de soupape

Publications (1)

Publication Number Publication Date
WO2022064543A1 true WO2022064543A1 (fr) 2022-03-31

Family

ID=80845623

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/035667 WO2022064543A1 (fr) 2020-09-23 2020-09-23 Dispositif de soupape

Country Status (2)

Country Link
JP (1) JP7146149B2 (fr)
WO (1) WO2022064543A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024009416A1 (fr) * 2022-07-06 2024-01-11 三菱電機株式会社 Moteur et dispositif de soupape

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56147980A (en) * 1980-04-15 1981-11-17 Fujisawa Pharmaceut Co Ltd Valve
JP2016194269A (ja) * 2015-03-31 2016-11-17 株式会社デンソー Ｅｇｒ装置
JP2018503026A (ja) * 2014-11-10 2018-02-01 コンチネンタル オートモーティヴ ゲゼルシャフト ミット ベシュレンクテル ハフツングＣｏｎｔｉｎｅｎｔａｌ Ａｕｔｏｍｏｔｉｖｅ ＧｍｂＨ シールシステム及びシールシステムを備える排ガス再循環バルブ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56147980A (en) * 1980-04-15 1981-11-17 Fujisawa Pharmaceut Co Ltd Valve
JP2018503026A (ja) * 2014-11-10 2018-02-01 コンチネンタル オートモーティヴ ゲゼルシャフト ミット ベシュレンクテル ハフツングＣｏｎｔｉｎｅｎｔａｌ Ａｕｔｏｍｏｔｉｖｅ ＧｍｂＨ シールシステム及びシールシステムを備える排ガス再循環バルブ
JP2016194269A (ja) * 2015-03-31 2016-11-17 株式会社デンソー Ｅｇｒ装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024009416A1 (fr) * 2022-07-06 2024-01-11 三菱電機株式会社 Moteur et dispositif de soupape

Also Published As

Publication number Publication date
JPWO2022064543A1 (fr) 2022-03-31
JP7146149B2 (ja) 2022-10-03

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