EP0745758A1 - Schnüffelventilanordnung - Google Patents

Schnüffelventilanordnung Download PDF

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Publication number
EP0745758A1
EP0745758A1 EP95401006A EP95401006A EP0745758A1 EP 0745758 A1 EP0745758 A1 EP 0745758A1 EP 95401006 A EP95401006 A EP 95401006A EP 95401006 A EP95401006 A EP 95401006A EP 0745758 A1 EP0745758 A1 EP 0745758A1
Authority
EP
European Patent Office
Prior art keywords
valve
valve stem
circumferential surface
guide
outer circumferential
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.)
Withdrawn
Application number
EP95401006A
Other languages
English (en)
French (fr)
Inventor
Kenichi Satoh
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.)
Fuji Oozx Inc
Original Assignee
Fuji Oozx Inc
Fuji Valve 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 Fuji Oozx Inc, Fuji Valve Co Ltd filed Critical Fuji Oozx Inc
Priority to EP95401006A priority Critical patent/EP0745758A1/de
Publication of EP0745758A1 publication Critical patent/EP0745758A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group

Definitions

  • the present invention relates to a poppet valve device, and especially to a poppet valve device to increase oil keeping capability of the contacting surface between the valve and a valve guide, thereby decreasing wear of the surface.
  • Fig. 5 illustrates a conventional poppet valve device, in which a valve stem 23a of a poppet valve 23 is fitted to be axially slidable in a cylindrical valve guide 22 which is in a press fit with a cylinder head 21 of an internal combustion engine.
  • a valve head 23b of the poppet valve 23 is engaged on a valve seat 24 which is in a press fit with the lower end of the cylinder head 21.
  • the poppet valve 23 is reciprocated in an axial direction by a rocker arm 25 which is engaged on the upper end of the valve stem 23a, thereby supplying and exhausting a gas.
  • 26 denotes a lip seal which is attached on the upper end of the valve guide 22, so that excessive oil is not flowed into the contacting surface between the valve stem 23a and the valve guide 22.
  • a groove on the outer circumferential surface 23c of the valve stem 23a or the inner circumferential surface 22a of the valve guide 22 to increase oil keeping capability, but such a groove decreases the strength and rigidity of the valve stem 23a.
  • a poppet valve device comprising a valve which comprises a valve stem and a valve head; and a valve guide which is in a press fit with a cylinder head, the valve stem being slidably engaged in the valve guide, the valve being axially reciprocated by feeding and exhausting a gas in an internal combustion engine, on one of the outer circumferential surface of the valve stem and the inner circumferential surface of the valve guide, an annular or spiral groove being formed, porous material which has oil keeping capability being engaged in the groove.
  • the porous material is provided in the annular or spiral groove on the valve stem or the valve guide, thereby maintaining oil which is flowed in through a gap between the valve stem and the valve guide. Owing to reciprocating motion of the poppet valve, maintained oil is uniformly supplied to the contacting surface between the valve guide and the valve stem in proper quantities. Thus, no local wear occurs on the outer circumferential surface of the valve stem or the inner circumferential surface of the valve guide, and no noise occurs during reciprocating motion of the valve. Also, it is prevented for oil to go down since oil is maintained.
  • the porous material in the annular or spiral groove does not decrease strength and rigidity of the valve stem or valve guide.
  • annular grooves 7 there are formed two annular grooves 7 at the ends of the outer circumferential surface of a valve stem 3a of a valve 3, the outer circumferential surface of the valve stem 3a being slidably engaged in a valve guide 2.
  • ring-shaped porous materials 8 partially cut out are tightly engaged, as shown in Fig. 2, the materials having oil keeping capability and elasticity.
  • the porous materials 8 elastically expanded may be engaged around the annular grooves 7 before the valve 3 is inserted in the valve guide 2. After engagement, the outer diameter of the porous material 8 may be roughly equal to the outer diameter of the valve stem 3a.
  • porous material 8 for example, powder metallurgical material, metal fiber felt, foamed metal and hard foam resin are suitable.
  • porous material 8 around the annular groove 7
  • integral molding may be made, and the surface of the porous material 8 may be made to be equal to the outer diameter of the valve stem 3a by mechanical processing after molding.
  • the porous material used in molding may include foam resin and porous ceramics.
  • the porous material 8 always maintains oil which comes through a gap between the lip seal and the valve stem 3a, and owing to reciprocating motion of the valve 3, maintained oil may be uniformly supplied onto the whole contacting surface between the valve stem 3a and the valve guide 2 in proper quantities.
  • Fig. 3 illustrates an embodiment in which a hard porous plate 10 which has low specific gravity is fixed or engaged around the outer circumferential surface of an annular thin plate 9 made of spring steel etc. to form a porous material 11, thereby reducing weight of the porous material 11, so that increase in weight of the valve may be at minimum.
  • porous material may be coated or porous phosphate or sulfuric acid coating may be formed on the outer circumferential surface of the annular thin plate 9. A number of pores may be formed in the annular thin plate 9.
  • the second embodiment will be described with respect to Fig. 4.
  • the same numerals are allotted to the same members as those in the first embodiment, and its detailed description will be omitted.
  • a spiral groove 12 on which spiral porous material 8 or 11 as mentioned above are tightly engaged.
  • annular groove 7 or spiral groove 12 on which the porous material 8 or 11 are attached, but there may be formed a groove or grooves on the inner circumferential surface of the valve guide 2 on which porous material is attached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP95401006A 1995-05-02 1995-05-02 Schnüffelventilanordnung Withdrawn EP0745758A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95401006A EP0745758A1 (de) 1995-05-02 1995-05-02 Schnüffelventilanordnung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95401006A EP0745758A1 (de) 1995-05-02 1995-05-02 Schnüffelventilanordnung

Publications (1)

Publication Number Publication Date
EP0745758A1 true EP0745758A1 (de) 1996-12-04

Family

ID=8221486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401006A Withdrawn EP0745758A1 (de) 1995-05-02 1995-05-02 Schnüffelventilanordnung

Country Status (1)

Country Link
EP (1) EP0745758A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1437485A1 (de) * 2003-01-08 2004-07-14 TRW Deutschland GmbH Verfahren zum Herstellen eines Aktuators mit pulvermetallurgischem Positionsmessmittel, sowie Aktuator
US6911565B2 (en) 2001-09-26 2005-06-28 Danico Sweetners Oy Process for the production of xylitol
CN104632316A (zh) * 2013-11-13 2015-05-20 北京汽车动力总成有限公司 发动机气门导管及总成

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB205849A (en) * 1922-06-26 1923-10-26 Thomas Andrew Lawrie Improvements in valves of the mushroom type
US2775024A (en) * 1953-05-29 1956-12-25 Thompson Prod Inc Powder metal multi-ring bushing
GB1076545A (en) * 1965-02-26 1967-07-19 Brico Eng Internal combustion engine valve mechanisms
US5062397A (en) * 1990-09-07 1991-11-05 Eaton Corporation Valve stem seal
EP0481763A1 (de) * 1990-10-18 1992-04-22 Hitachi Powdered Metals Co., Ltd. Sintermetallteile und Verfahren zur ihrer Herstellung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB205849A (en) * 1922-06-26 1923-10-26 Thomas Andrew Lawrie Improvements in valves of the mushroom type
US2775024A (en) * 1953-05-29 1956-12-25 Thompson Prod Inc Powder metal multi-ring bushing
GB1076545A (en) * 1965-02-26 1967-07-19 Brico Eng Internal combustion engine valve mechanisms
US5062397A (en) * 1990-09-07 1991-11-05 Eaton Corporation Valve stem seal
EP0481763A1 (de) * 1990-10-18 1992-04-22 Hitachi Powdered Metals Co., Ltd. Sintermetallteile und Verfahren zur ihrer Herstellung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6911565B2 (en) 2001-09-26 2005-06-28 Danico Sweetners Oy Process for the production of xylitol
EP1437485A1 (de) * 2003-01-08 2004-07-14 TRW Deutschland GmbH Verfahren zum Herstellen eines Aktuators mit pulvermetallurgischem Positionsmessmittel, sowie Aktuator
CN104632316A (zh) * 2013-11-13 2015-05-20 北京汽车动力总成有限公司 发动机气门导管及总成

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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Designated state(s): DE ES FR GB IT

17P Request for examination filed

Effective date: 19970526

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19980401