EP1630364B1 - Siège de soupape avec une surface exterieur cylindrique - Google Patents

Siège de soupape avec une surface exterieur cylindrique Download PDF

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Publication number
EP1630364B1
EP1630364B1 EP20050014597 EP05014597A EP1630364B1 EP 1630364 B1 EP1630364 B1 EP 1630364B1 EP 20050014597 EP20050014597 EP 20050014597 EP 05014597 A EP05014597 A EP 05014597A EP 1630364 B1 EP1630364 B1 EP 1630364B1
Authority
EP
European Patent Office
Prior art keywords
valve seat
seat ring
cylinder head
excess
cylindrical outer
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.)
Active
Application number
EP20050014597
Other languages
German (de)
English (en)
Other versions
EP1630364A1 (fr
Inventor
Andreas Bluem
Uwe Karrer
Martin Hoyer
Friedrich Dr. Ohmenhäuser
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1630364A1 publication Critical patent/EP1630364A1/fr
Application granted granted Critical
Publication of EP1630364B1 publication Critical patent/EP1630364B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F01L3/22—Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats

Definitions

  • the invention relates to a cylinder head of an internal combustion engine having a valve seat ring inserted into a cylindrical bore, wherein the valve seat ring has a cylindrical outer surface and an outer diameter with excess relative to the diameter of the cylindrical bore and the cylinder head is formed of a material with greater thermal expansion than the valve seat ring.
  • Valve seat rings are usually connected by a shrinking and / or pressing with the cylinder head.
  • a certain excess of the valve seat ring is required.
  • the experts were of the opinion that this oversize must be greater, the more different the thermal expansions of the materials from which the valve seat ring or the cylinder head is made.
  • the thermal expansion of aluminum is almost twice that of steel.
  • US 4,896,638 A is known a valve seat ring made of steel, which is used with excess in a bore of a cylinder head made of aluminum.
  • the invention has for its object to overcome the above difficulties by optimizing the interpretation of the excess of the valve seat ring.
  • valve seat ring has an excess of at most 1.5 parts per thousand.
  • the invention is based on the finding that the cylinder head due to the uneven temperature distribution in the region of the combustion chamber roof at a free Extension is prevented. For this reason, contrary to the previous opinion, an excess of the valve seat ring of 1.5 parts per thousand or even less is sufficient.
  • the inventors have recognized that a thermal distortion of the combustion chamber roof caused by unequal temperature distribution prevents free expansion thereof.
  • the combustion chamber roof is surrounded by a material region which has a lower temperature. This self-contained material area effectively acts like a lashing or a tire that prevents free thermal expansion of the higher temperature combustion chamber roof. The actual expansion of the cylinder head in the region of the combustion chamber roof is therefore much lower than previously assumed.
  • valve seat rings which have virtually no oversize, a reliable hold in the cylinder head is guaranteed at operating temperature.
  • the valve seat ring should have an excess of at least 0.1 parts per thousand, preferably 0.5 parts per thousand for safety reasons.
  • the sole figure of the drawing shows a longitudinal section through a valve seat ring in the installed state.
  • an annular groove 2 having a diameter D1 is formed in an aluminum alloy cylinder head 1.
  • a valve seat ring 3 made of steel with an outer diameter D1 is inserted.
  • a conical valve seat surface 4 is formed for the valve plate of a (not shown) valve.
  • valve seat ring 3 Since the thermal expansion of aluminum is substantially greater than that of steel, the valve seat ring 3 must be used with excess in the cylinder head 1, to ensure a secure hold at operating temperature. On the other hand, the excess of the valve seat ring for the reasons mentioned above should be as small as possible in order to facilitate the insertion process and to avoid unnecessary stresses in the cylinder head. To meet these two requirements, the valve seat ring has an excess, which is in the range of 0.5 to 1.5 parts per thousand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (2)

  1. Culasse d'un moteur à combustion interne équipée d'un siège de soupape inséré dans un perçage cylindrique (2), le siège de soupape (3) ayant une surface extérieure cylindrique dont le diamètre (D1) a un surdimensionnement par rapport au diamètre (D2) du perçage cylindrique (2), et la culasse (1) étant en un matériau de plus grande dilatation thermique que celle du matériau du siège de soupape (3),
    caractérisée en ce que
    le diamètre extérieur du siège de soupape (3) présente par rapport au diamètre du perçage (2) un surdimensionnement de 0,1 pour mille à 1,5 pour mille.
  2. Culasse selon la revendication 1,
    caractérisée en ce que
    le surdimensionnement est d'au moins 0,5 pour mille.
EP20050014597 2004-08-12 2005-07-06 Siège de soupape avec une surface exterieur cylindrique Active EP1630364B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200410039307 DE102004039307A1 (de) 2004-08-12 2004-08-12 Ventilsitzring mit zylindrischer Außenfläche

Publications (2)

Publication Number Publication Date
EP1630364A1 EP1630364A1 (fr) 2006-03-01
EP1630364B1 true EP1630364B1 (fr) 2008-01-30

Family

ID=35170003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050014597 Active EP1630364B1 (fr) 2004-08-12 2005-07-06 Siège de soupape avec une surface exterieur cylindrique

Country Status (2)

Country Link
EP (1) EP1630364B1 (fr)
DE (2) DE102004039307A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109057907B (zh) * 2018-09-30 2019-10-15 广西玉柴机器股份有限公司 一种气门座圈

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800122A (en) * 1955-03-16 1957-07-23 Thompson Prod Inc Valve seat insert
GB779544A (en) * 1956-02-20 1957-07-24 Thompson Prod Inc Improvements in or relating to valve seat inserts
US3285235A (en) * 1964-12-24 1966-11-15 Gen Electric Valve seat insert
AU572425B2 (en) * 1983-07-01 1988-05-05 Sumitomo Electric Industries, Ltd. Valve seat insert
US4671491A (en) * 1984-06-12 1987-06-09 Sumitomo Electric Industries, Ltd. Valve-seat insert for internal combustion engines and its production
JPS62107216A (ja) * 1985-11-05 1987-05-18 Ngk Insulators Ltd バルブシートインサート及びその製造法並びにそれを使用してなるシリンダーヘッド
US4896638A (en) * 1988-12-07 1990-01-30 Ford Motor Company Fabricating internal combustion engine cylinder heads with close tolerance internal surfaces
DE4016728A1 (de) * 1990-05-24 1991-11-28 Daimler Benz Ag Ventilsitzring mit membraneinsatz zur drallerzeugung
JPH04255510A (ja) * 1991-02-01 1992-09-10 Honda Motor Co Ltd 内燃機関のバルブシート回りの加工方法
US6599345B2 (en) * 2001-10-02 2003-07-29 Eaton Corporation Powder metal valve guide

Also Published As

Publication number Publication date
DE502005002332D1 (de) 2008-03-27
EP1630364A1 (fr) 2006-03-01
DE102004039307A1 (de) 2006-02-23

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