EP0356641B1 - Dispositif de refroidissement pour des sièges de soupapes situés dans une culasse de moteur à combustion interne - Google Patents

Dispositif de refroidissement pour des sièges de soupapes situés dans une culasse de moteur à combustion interne Download PDF

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Publication number
EP0356641B1
EP0356641B1 EP89111053A EP89111053A EP0356641B1 EP 0356641 B1 EP0356641 B1 EP 0356641B1 EP 89111053 A EP89111053 A EP 89111053A EP 89111053 A EP89111053 A EP 89111053A EP 0356641 B1 EP0356641 B1 EP 0356641B1
Authority
EP
European Patent Office
Prior art keywords
cooling
ring
camshaft
arrangement according
cylinder head
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
EP89111053A
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German (de)
English (en)
Other versions
EP0356641A3 (en
EP0356641A2 (fr
Inventor
Michael Beer
Philipp Schimko
August Dipl.-Ing. Hofbauer
Matthias Dipl.-Ing. Kröner
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche 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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP0356641A2 publication Critical patent/EP0356641A2/fr
Publication of EP0356641A3 publication Critical patent/EP0356641A3/de
Application granted granted Critical
Publication of EP0356641B1 publication Critical patent/EP0356641B1/fr
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
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/12—Arrangements for cooling other engine or machine parts
    • F01P3/14—Arrangements for cooling other engine or machine parts for cooling intake or exhaust valves
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P9/00—Cooling having pertinent characteristics not provided for in, or of interest apart from, groups F01P1/00 - F01P7/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F01M9/101—Lubrication of valve gear or auxiliaries of cam surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Definitions

  • the invention relates to a valve seat ring cooling system according to the preamble of claim 1.
  • valve seats in particular the thermally highly loaded valve seat rings of exhaust valves of an internal combustion engine.
  • a valve seat ring cooling is known in which the cooling water used for cooling the internal combustion engine is used as the cooling medium.
  • the cooling water flows radially into the cooling channels of the valve seat rings and out through an opening opposite the inlet.
  • the drain openings open into a channel that leads directly into the suction side of the cooling water pump, which supplies the internal combustion engine with cooling water. This arrangement is not applicable when the internal combustion engine is air-cooled.
  • Cooling the valve seat rings of a liquid-cooled internal combustion engine independently of the main cooling circuit by another coolant, for example lubricating oil, in a separate cooling circuit is known from DE-0S 15 76 727.
  • the coolant first flows to the exhaust valve seat rings and from there to the seat rings of the Inlet valves. A uniform flow around the seat rings is not guaranteed due to the piping.
  • a separate coolant circuit with its own pump is required.
  • the object of the present invention is therefore to provide a cooling device for valve seat rings of an air-cooled internal combustion engine, which is connected to an existing lubricating oil circuit and through which an optimal and uniform cooling of all valve seat rings is achieved.
  • the feed and discharge lines can be easily produced as bores perpendicular to the separating surface between the cylinder head and the camshaft housing.
  • the second embodiment of the invention specified in the subclaims does not require drilling in the cylinder head for the supply and discharge lines, since they are made in one piece with a part of a cooling ring, so that they are cast into the cylinder head.
  • the cooling ring surrounding the valve seat ring is constructed from two cooling ring parts which are welded together. This ensures that the ring channel running in the cooling ring is oil-tight. This is particularly advantageous since no oil can get into the combustion chamber or the exhaust duct. Furthermore, there is no leakage oil if the valve seat ring has to be replaced or reworked.
  • the valve seat ring can be easily replaced and a free choice of materials for the valve seat ring is possible regardless of the cooling ring.
  • the surface of the ring channel is enlarged by at least two circumferential projections, so that an optimal heat transfer takes place.
  • Fig. 1 shows a cylinder head 1 with a camshaft housing 2 mounted thereon of an internal combustion engine operating in the four-stroke process.
  • the cylinder head 1 has, inter alia, at least one exhaust port 4 , to which an unillustrated valve is assigned.
  • a valve seat ring 5 which is surrounded by an annular channel 6 , is arranged in each outlet channel 4 .
  • the lubricating oil used to lubricate the internal combustion engine circulates as the cooling medium.
  • the ring channel 6 is provided with a feed line 7 and a discharge line 8 , which open into the ring channel 6 in two closely spaced openings 9 , 10 .
  • an oil channel 12 runs parallel to at least one camshaft 11 and supplies the camshaft bearings with lubricating oil.
  • the feed line 7 is formed by two bores 13 , 14 in the camshaft housing 2 which extend transversely to the oil channel 12 and a bore 15 in the cylinder head 1 which adjoins the bore 14 .
  • the oil pumped with pressure from an oil pump through the lubricating oil circuit of the internal combustion engine flows through the oil channel 12 and from there, inter alia, through the supply line 7 into the ring channel 6 .
  • the opening 9 is almost completely separated from the opening 10 by a projection 16 projecting into the annular channel 6 in both embodiments of the invention.
  • the outer surface 17 of the valve seat ring 5 and the outer surface 30 of the inner cooling ring part 23 are provided with at least two circumferential projections 18 .
  • the discharge line 8 in the camshaft housing 2 is connected to a cuboid collecting space 20 which has at least two outlet openings 21 .
  • the distance between the outlet openings 21 is selected so that the oil emerging from the collecting space 20 is sprayed directly onto the cams 22 of the camshaft 11 . This reduces the wear between cam 22 and the valves and increases their service life.
  • the oil has no direct contact with the valve seat ring 5 ' , but flows in an annular channel 6 which extends within a cooling ring 25 .
  • the cooling ring 25 consists of an inner cooling ring part 23 and an outer cooling ring part 24 .
  • the valve seat ring 5 ' has an L-shaped cross-sectional area and is pressed into the cooling ring 25 .
  • one leg 26 of the valve seat ring 5 ' is in surface contact with the inner surface 27 of the inner cooling ring part 23 and thus ensures good heat transfer from the valve seat ring 5' to the cooling ring 25 .
  • Another leg 28 bears against the end face 29 of the inner cooling ring part 23 facing the combustion chamber 3 and thus defines the desired pressing depth of the valve seat ring 5 ' into the cooling ring 25 . Furthermore, the displacement of the valve seat ring into the outlet channel 4 is prevented by the closing outlet valve.
  • the part of the supply line 7 running inside the cylinder head 1 and the discharge line 8 are made in one piece with the outer cooling ring part 24 . After welding the inner and outer cooling ring part 23, 24 to the cooling ring 25 , this is poured into the cylinder head 1 . Drilling for coolant supply and removal in the cylinder head 1 is thus eliminated.
  • the coolant supply within the camshaft housing 2 and the use of the discharged coolant as a lubricant between the cams 22 and valves is carried out in the same way as in the first embodiment of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (10)

1. - Dispositif de refroidissement pour les sièges de soupape (5) rapportés, placés dans la culasse (1) d'un moteur à combustion interne refroidi à l'air, comportant un canal annulaire (6), entourant les sièges de soupape, traversé par de l'huile de lubrification et comportant un autre canal d'huile (12) qui alimente les points d'appui d'un arbre à cames en huile de lubrification (12) et qui s'étend dans un logement de l'arbre à cames (2), situé au-dessus d'une culasse (1), parallèlement à l'arbre à cames, et comportant chacun un conduit d'alimentation (7) qui mène du canal d'huile (12) au canal annulaire (6), ainsi qu'un conduit d'évacuation (8) qui mène du canal annulaire (6) dans le logement (2) de l'arbre à cames, caractèrisé en ce qu'un conduit d'alimentation (7) et un conduit d'évacuation (8) débouchent dans chaque canal annulaire (6), dans des orifices (9, 10) très rapprochés et en ce qu'un orifice de sortie (21) du conduit d'évacuation (8) est pratiqué dans le logement (2), à proximité immédiate de cames (22) et en ce que le canal annulaire (6) présente une partie saillante (16) le rétrécissant fortement, entre les deux orifices (9, 10).
2. - Dispositif de refroidissement selon la revendication 1, caractérisé en ce que le canal annulaire (6) est formé dans un anneau de refroidissement (25) qui entoure le siège de soupape rapporté (5).
3. - Dispositif de refroidissement selon la revendication 2, caractérisé en ce que l'anneau de refroidissement (25) est constitué d'une partie intérieure (23) et d'une partie extérieure (24) et en ce que la partie extérieure (24) comporte un conduit d'alimentation (7) et un conduit d'évacuation (8), ceux-ci débouchant dans des orifices (9, 10) très rapprochés, dans la partie extérieure (24) de l'anneau de refroidissement.
4. - Dispositif de refroidissement selon la revendication 3, caractérisé en ce que la partie extérieure (24) de l'anneau de refroidissement est réalisée d'une seule pièce avec le conduit d'alimentation (7) et le conduit d'évacuation (8).
5. - Dispositif de refroidissement selon la revendication 1, caractèrisé en ce que chaque conduit d'alimentation (7) est formé par des alésages (13, 14, 15) s'étendant transversalement au canal d'huile (12) dans le logement (2) de l'arbre à cames et dans une culasse (1) et en ce que le conduit d'évacuation (8) est formé par un alésage (19), pratiqué dans la culasse (1), qui est orienté à partir du canal annulaire (6), perpendiculairement à l'axe médian longitudinal (M) de l'arbre à cames.
6. - Dispositif de refroidissement selon les revendications 1 ou 2, caractérisé en ce qu'à chaque conduit d'évacuation (8) est associé, dans la surface de séparation entre la culasse (1) et le logement (2) de l'arbre à cames, un volume de collecte (20) qui est formé dans le logement (2) et qui comporte au moins deux orifices de sortie (21) en direction de l'arbre à cames (11).
7. - Dispositif de refroidissement selon la revendication 6, caractérisé en ce que chaque orifice de sortie (21) d'un volume de collecte (20) est dirigé vers une came (22) de l'arbre à cames (11).
8. - Dispositif de refroidissement selon les revendications 1 et 2, caractérisé en ce que la surface extérieure (17) du siège de soupape rapporté (5) et la surface extérieure (30) de la partie intèrieure (23) de l'anneau de refroidissement comportent au moins deux parties saillantes (18) sur leur pourtour.
9. - Dispositif de refroidissement selon la revendication 2, caractérisé en ce que chaque siège de soupape rapporté (5′) présente une section transversale en L et s'applique, par une branche (26), contre la surface intérieure (27) de la partie intérieure (23) de l'anneau de refroidissement et s'applique par une branche (28) contre une surface frontale (29) de la partie intérieure (23) de l'anneau de refroidissement.
10. - Dispositif de refroidissement selon la revendication 2, caractérisé en ce qu'on utilise comme matériau pour l'anneau de refroidissement (25) un métal lourd non ferreux ou de l'acier.
EP89111053A 1988-08-30 1989-06-19 Dispositif de refroidissement pour des sièges de soupapes situés dans une culasse de moteur à combustion interne Expired - Lifetime EP0356641B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3829339 1988-08-30
DE3829339A DE3829339C1 (fr) 1988-08-30 1988-08-30

Publications (3)

Publication Number Publication Date
EP0356641A2 EP0356641A2 (fr) 1990-03-07
EP0356641A3 EP0356641A3 (en) 1990-05-23
EP0356641B1 true EP0356641B1 (fr) 1992-10-07

Family

ID=6361854

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89111053A Expired - Lifetime EP0356641B1 (fr) 1988-08-30 1989-06-19 Dispositif de refroidissement pour des sièges de soupapes situés dans une culasse de moteur à combustion interne

Country Status (4)

Country Link
US (1) US4941436A (fr)
EP (1) EP0356641B1 (fr)
JP (1) JPH02104908A (fr)
DE (2) DE3829339C1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT404390B (de) * 1992-09-24 1998-11-25 Avl Verbrennungskraft Messtech Brennkraftmaschine mit einem abschnittsweise gekühlten ventilsitzring
KR19990001641A (ko) * 1997-06-17 1999-01-15 김영귀 자동차 흡,배기밸브 시트의 냉각장치
DE10122581A1 (de) * 2001-05-10 2003-01-09 Mahle Ventiltrieb Gmbh Gekühlter Ventilsitzring
DE102004027084A1 (de) * 2004-06-02 2005-12-29 Man B & W Diesel Ag Gekühlter Ventilsitzring
FR2876747A1 (fr) * 2004-10-15 2006-04-21 Renault Sas Moteur thermique comportant un moyen de rechauffage electrique du conduit d'admission
FI124071B (fi) * 2006-11-14 2014-02-28 Waertsilae Finland Oy Mäntämoottorin venttiilin istukkarengas
FR2955618B1 (fr) * 2010-01-26 2016-02-19 Motorisations Aeronautiques Culasse de moteur a combustion interne comportant un circuit de refroidissement
FR3013771A1 (fr) * 2013-11-22 2015-05-29 Peugeot Citroen Automobiles Sa Moteur thermique de vehicule automobile muni d'un insert pour la circulation d'un fluide et insert correspondant
DE102014012807A1 (de) 2014-08-28 2016-03-03 Daimler Ag Zylinderkopf für eine Verbrennungskraftmaschine, insbesondere eines Kraftwagens
JP2018048587A (ja) * 2016-09-21 2018-03-29 トヨタ自動車株式会社 内燃機関
WO2018156682A1 (fr) 2017-02-24 2018-08-30 Cummins Inc. Système de refroidissement de moteur comprenant des sièges d'échappement refroidis
US10989146B2 (en) * 2018-11-05 2021-04-27 Caterpillar Inc. Oil injection methods for combustion enhancement in natural gas reciprocating engines

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
FR1012328A (fr) * 1949-03-09 1952-07-08 Sulzer Ag Siège de soupape rapporté
GB668962A (en) * 1949-03-09 1952-03-26 Sulzer Ag Improvements relating to machine parts with inserted valve seats
GB844119A (en) * 1957-07-26 1960-08-10 Sulzer Ag Liquid-cooled cylinder heads for internal combustion engines
US3115125A (en) * 1961-09-25 1963-12-24 Charles O Spencer Internal combustion engine cooling system
DE1576727A1 (de) * 1967-11-22 1970-06-18 Kloeckner Humboldt Deutz Ag Zylinderkopf fuer eine fluessigkeitsgekuehlte ventilgesteuerte Brennkraftmaschine
FR2095694A5 (fr) * 1970-06-05 1972-02-11 Kloeckner Humboldt Deutz Ag
FR2282041A1 (fr) * 1974-08-13 1976-03-12 Tatra Np Procede et appareillage de refroidissement de la culasse de moteurs refroidis a l'air
CH614014A5 (fr) * 1977-01-28 1979-10-31 Sulzer Ag
FR2399541A1 (fr) * 1977-08-05 1979-03-02 Semt Chapelle de soupape en champignon refroidie par circulation d'un fluide refrigerant, pour moteur a combustion interne
DE3412052C2 (de) * 1984-03-31 1987-02-26 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Kühlvorrichtung

Also Published As

Publication number Publication date
US4941436A (en) 1990-07-17
DE3829339C1 (fr) 1989-12-14
EP0356641A3 (en) 1990-05-23
EP0356641A2 (fr) 1990-03-07
JPH02104908A (ja) 1990-04-17
DE58902410D1 (de) 1992-11-12

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