EP0186888B1 - Moteur à piston alternatif - Google Patents

Moteur à piston alternatif Download PDF

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Publication number
EP0186888B1
EP0186888B1 EP85116450A EP85116450A EP0186888B1 EP 0186888 B1 EP0186888 B1 EP 0186888B1 EP 85116450 A EP85116450 A EP 85116450A EP 85116450 A EP85116450 A EP 85116450A EP 0186888 B1 EP0186888 B1 EP 0186888B1
Authority
EP
European Patent Office
Prior art keywords
valve seat
valve
stepped part
locating bore
shoulder
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
Application number
EP85116450A
Other languages
German (de)
English (en)
Other versions
EP0186888A1 (fr
Inventor
Michael Klocke
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz 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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0186888A1 publication Critical patent/EP0186888A1/fr
Application granted granted Critical
Publication of EP0186888B1 publication Critical patent/EP0186888B1/fr
Expired 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
    • F01L3/22—Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats

Definitions

  • the invention relates to a reciprocating piston internal combustion engine with a valve seat which can be inserted into the gas exchange duct as a receiving bore in the cylinder head base in the manner of a bushing and which has at least one wholly or partially extending annular space for the coolant flow and which on its side facing the cylinder in one right-angled part of the receiving bore is supported radially via its cylindrical lateral surface and axially on the shoulder formed, forces exerted on the valve seat surface by the valve plate being broken down as radial and axial force components within the valve seat and in their directions of action in the valve seat and in the cylinder head base only in full-walled areas thereof Parts run.
  • Such an arrangement of a valve seat in an internal combustion engine has become known from CH-A-447 711, which is welded to a part of a valve cage serving to receive it.
  • an annular space is provided, through which a cooling liquid flows during operation of the internal combustion engine.
  • the annular space is predominantly in the housing of the valve cage and engages only slightly in the part of the valve seat facing it.
  • the annular space has a relatively small cross section for the passage of the cooling liquid and it requires the use of a special casting core or machining to produce it. Both methods of producing the annular space are particularly difficult when the annular space is not to be arranged in a valve cage which can be produced per se, but rather directly in the cylinder head base near the receiving bore for the valve seat.
  • a cooled poppet valve for a reciprocating piston internal combustion engine has become known, the valve seat of which extends into the gas exchange duct.
  • the valve seat is supported radially and axially in a part of the receiving bore offset on the cylinder side and has an annular cooling channel which is connected to the cooling water circuit of the internal combustion engine.
  • a valve seat of this design is subject to considerable bending stress due to the location of the cooling channel. This is due in particular to the fact that they exert an axial load on the axial force components emanating from the valve via the valve seat surface, and the walls of the cooling channel lying in their area of effect. In order to absorb these forces, the valve seat in this area must be made with large wall thicknesses and in high-quality materials. Both measures lead to a significantly poorer cooling effect at the outlet valve, especially since the high-quality materials have a poorer thermal conductivity.
  • the gas exchange channel 2 is formed on the cylinder side as a receiving bore 3 for a valve seat 4, which merges at its end that runs out toward the cylinder into a part 5 that is offset to a larger diameter.
  • This part 5, which is set apart from the receiving bore 3, is delimited in the axial direction by a shoulder 6, which lies in a plane running at right angles to the central axis of the receiving bore 3.
  • a sleeve-shaped valve seat 4 is provided, which extends from the stepped part 5 to close to the other end of the receiving bore 3.
  • annular space 7 Located on the valve seat 4 in its upper region is an annular space 7 which is delimited on the outside by the receiving bore 3 and which serves for the flow of a coolant.
  • the valve seat 4 In the area of the stepped part 5 of the receiving bore 3, the valve seat 4 is supported radially via its cylindrical outer surface 8 on an outer wall 9 and axially via a flat annular surface on the shoulder 6.
  • the valve seat 4 in its area located in the offset part 5 also has an annular space 12 which is delimited on the outside by the cylinder head base 1.
  • the annular space 12 is connected through a channel 13 to the cooling water circuit of the internal combustion engine. Between the two annular spaces 7 and 12 provided in the valve seat 4 there are at least two connecting channels 14 for the supply and
  • the radial force components are transmitted directly via the lateral surface of the valve seat 4 to the cylinder head base 1 enclosing the latter, while the axial force components are also directly absorbed by the shoulder 6 according to arrow 19.
  • bending stresses do not occur in the valve seat 4 in the effective range of the radial or the axial force components according to the arrows 18 or 19.

Landscapes

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

Claims (1)

  1. Moteur à combustion interne à piston alternatif comportant un siège de soupape (4) logé à la manière d'une douille dans un alésage de réception (3) dans le canal d'échange de gaz (2) dans le fond (1) de la tête de cylindre, siège qui comporte au moins un volume annulaire (7, 12) de passage du fluide de refroidissement, total ou partiel, et qui s'appuie par son côté tourné vers le cylindre dans une partie agrandie (5) à l'équerre de l'alésage de réception (3), radialement par sa surface-enveloppe (8) cylindrique et axialement par l'épaulement (6) ainsi formé, les efforts exercés par la soupape sur le siège de soupape (4) étant décomposés en une composante radiale et une composante axiale (flèches 18, 19) et leur direction d'action par rapport au siège de soupape (4) et au fond de la tête de cylindre (1) ne passe que par les zones pleines de ces pièces, moteur caractérisé par la combinaison des caractéristiques suivantes:
    a) la partie du siège de soupape (4) pénétrant dans la partie agrandie (5) de l'alésage de réception (3) du fond de la tête de cylindre (1) forme par une cavité correspondante une première chambre annulaire (12) qui est délimitée extérieurement par l'épaulement (6) et par la surface d'appui radiale (8) et
    b) le siège de soupape (4) comporte dans sa zone adjacente à la partie (5) dans l'alésage de réception (3), une seconde chambre annulaire (7) délimitée extérieurement par l'alésage de réception (3) du siège de soupape (4), chambre qui se trouve au niveau de la soupape et qui s'étend en direction du cylindre au maximum jusqu'à l'épaulement (6) de la partie agrandie (5) du perçage de réception (3).
EP85116450A 1985-01-03 1985-12-21 Moteur à piston alternatif Expired EP0186888B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853500060 DE3500060A1 (de) 1985-01-03 1985-01-03 Hubkolben-brennkraftmaschine
DE3500060 1985-01-03

Publications (2)

Publication Number Publication Date
EP0186888A1 EP0186888A1 (fr) 1986-07-09
EP0186888B1 true EP0186888B1 (fr) 1988-04-27

Family

ID=6259209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85116450A Expired EP0186888B1 (fr) 1985-01-03 1985-12-21 Moteur à piston alternatif

Country Status (3)

Country Link
EP (1) EP0186888B1 (fr)
DE (2) DE3500060A1 (fr)
FI (1) FI80130C (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4308733A1 (de) * 1993-03-19 1994-09-22 Audi Ag Zylinderkopf für eine Brennkraftmaschine
DE102004027084A1 (de) * 2004-06-02 2005-12-29 Man B & W Diesel Ag Gekühlter Ventilsitzring
US9422886B2 (en) * 2013-07-03 2016-08-23 Electro-Motive Diesel, Inc. Cylinder head assembly having cooled valve insert
DE102016008677A1 (de) * 2016-07-16 2018-01-18 Daimler Ag Ventilsitzring für eine Hubkolbenmaschine
WO2018156682A1 (fr) 2017-02-24 2018-08-30 Cummins Inc. Système de refroidissement de moteur comprenant des sièges d'échappement refroidis

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1682499A (en) * 1926-11-18 1928-08-28 Hewitt A Gehres Valve construction
US3285235A (en) * 1964-12-24 1966-11-15 Gen Electric Valve seat insert
GB1100403A (en) * 1965-03-17 1968-01-24 Mirrlees Nat Ltd Improvements in or relating to caged poppet valves for internal combustion engines
CH571154A5 (fr) * 1973-10-31 1975-12-31 Sulzer Ag
CH612244A5 (fr) * 1976-05-24 1979-07-13 Sulzer Ag
DE3127122C2 (de) * 1981-07-03 1984-10-31 Gebrüder Sulzer AG, Winterthur Flüssigkeitsgekühlter Ventilsitz für ein Auslassventil einer Kolbenbrennkraftmaschine
DE3239353A1 (de) * 1982-10-23 1984-04-26 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Ventilsitzring fuer einen einlasskanal von ventilgesteuerten brennkraftmaschinen

Also Published As

Publication number Publication date
DE3562404D1 (en) 1988-06-01
EP0186888A1 (fr) 1986-07-09
FI860013A (fi) 1986-07-04
DE3500060A1 (de) 1986-07-03
FI80130B (fi) 1989-12-29
FI860013A0 (fi) 1986-01-02
FI80130C (fi) 1990-04-10

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