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EP0957238B1 - Ventilfeder in einer Brennkraftmaschine - Google Patents

Ventilfeder in einer Brennkraftmaschine Download PDF

Info

Publication number
EP0957238B1
EP0957238B1 EP19980303772 EP98303772A EP0957238B1 EP 0957238 B1 EP0957238 B1 EP 0957238B1 EP 19980303772 EP19980303772 EP 19980303772 EP 98303772 A EP98303772 A EP 98303772A EP 0957238 B1 EP0957238 B1 EP 0957238B1
Authority
EP
European Patent Office
Prior art keywords
valve spring
coil
combustion engine
internal combustion
terminal end
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.)
Expired - Lifetime
Application number
EP19980303772
Other languages
English (en)
French (fr)
Other versions
EP0957238A1 (de
Inventor
Nobuo Hara
Makoto Abe
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 EP19980303772 priority Critical patent/EP0957238B1/de
Priority to DE1998600693 priority patent/DE69800693T2/de
Publication of EP0957238A1 publication Critical patent/EP0957238A1/de
Application granted granted Critical
Publication of EP0957238B1 publication Critical patent/EP0957238B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • F01L1/462—Valve return spring arrangements

Definitions

  • the present invention relates to a valve spring used in a valve operating mechanism of an internal combustion engine for a vehicle such as an automobile (see JP-A-57 010 720).
  • a coil valve spring 1 used in a valve operating mechanism of an internal combustion engine is formed like a frustum.
  • the upper and lower surfaces of the valve spring 1 are flat to contact the lower surface of a retainer 2 and the upper surface of a cylinder head 3 respectively, as shown in Fig. 3.
  • a diameter of an uppermost winding is smaller, so that a horizontal distance with a tubular portion of the retainer 2 becomes smaller.
  • the valve spring 1 vibrates in a lateral direction owing to surging, so that an inner circumferential edge la vigorously comes in contact with an inner corner 5 between the tubular portion 2a and a receiving surface 2b, thereby causing wear.
  • wear thereon is unsuitable.
  • the numerals 6, 7 and 8 denote a poppet valve, a valve guide and a pair of cotters respectively.
  • valve spring in an internal combustion engine, said valve spring comprising a coil which is tapered upward, an upper surface of the coil being formed flat, a terminal end of said coil extending in a tangential direction to go away from an axis of the coil.
  • the terminal end of the coil extends away from the axis of the coil, thereby decreasing possibility of contact of the inner circumferential edge with a retainer to keep wear at minimum.
  • Fig. 1 illustrates the first embodiment of the present invention, in which the uppermost surface 4 of a frusto-conical valve spring 1 is flat, and a terminal end 9 extends in a tangential direction to go away from an axis of the valve spring.
  • a distance between an inner circumferential edge 1a and a tubular portion 2a of a retainer 2 is increased, thereby decreasing possibility that the terminal end 9 comes in contact with a corner 5 between the tubular portion 2a and a receiving surface (not shown) and keeping wear thereon at minimum.
  • Fig. 2 illustrates the second embodiment of the present invention, in which a terminal end 9 extends at almost the same curvature as the lowermost portion of a valve spring 1, thereby improving yield of the valve spring 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Springs (AREA)

Claims (2)

  1. Ventilfeder (1) für einen Verbrennungsmotor, die einen Wickel umfaßt, der nach oben kegelig zuläuft, wobei eine obere Oberfläche (4) des Wickels flach geformt ist, und ein Abschlußende (9) von besagtem Wickel sich in einer tangentialen Richtung von der Achse des Wickels weggerichtet erstreckt.
  2. Schraubenförmige Ventilfeder (1) nach Anspruch 1, dadurch gekennzeichnet, dass das Abschlußende (9) des Wickels sich mit nahezu derselben Biegung wie der unterste Abschnitt des Feder-Wickels erstreckt.
EP19980303772 1998-05-13 1998-05-13 Ventilfeder in einer Brennkraftmaschine Expired - Lifetime EP0957238B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19980303772 EP0957238B1 (de) 1998-05-13 1998-05-13 Ventilfeder in einer Brennkraftmaschine
DE1998600693 DE69800693T2 (de) 1998-05-13 1998-05-13 Ventilfeder in einer Brennkraftmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19980303772 EP0957238B1 (de) 1998-05-13 1998-05-13 Ventilfeder in einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0957238A1 EP0957238A1 (de) 1999-11-17
EP0957238B1 true EP0957238B1 (de) 2001-04-11

Family

ID=8234821

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980303772 Expired - Lifetime EP0957238B1 (de) 1998-05-13 1998-05-13 Ventilfeder in einer Brennkraftmaschine

Country Status (2)

Country Link
EP (1) EP0957238B1 (de)
DE (1) DE69800693T2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10222637A1 (de) * 2002-05-20 2003-12-11 Lsp Gmbh Federteller für ein Ventil
DE102006056486B4 (de) * 2006-11-30 2009-04-23 Entec Consulting Gmbh Einrichtung zur Verbindung einer Ventilfeder mit einem Gaswechselventil einer Verbrennungskraftmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1174576B (de) * 1959-09-25 1964-07-23 Ford Werke Ag Vorrichtung zur Abstuetzung des Endes von Ventilfedern fuer Brennkraftmaschinen
BR7506004A (pt) * 1974-09-18 1976-08-03 Stumpp & Schuele Kg Mola de pressao aperfeicoada
JPS5710720A (en) * 1980-06-25 1982-01-20 Nhk Spring Co Ltd Coil spring for internal combustion engine valve
JPH0828223A (ja) * 1994-07-14 1996-01-30 Fuji Oozx Inc 内燃機関における動弁機構用ばね受け

Also Published As

Publication number Publication date
EP0957238A1 (de) 1999-11-17
DE69800693D1 (de) 2001-05-17
DE69800693T2 (de) 2001-10-11

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