EP3822462A1 - Gas exchange valve and valve seat ring of a gas exchange valve - Google Patents

Gas exchange valve and valve seat ring of a gas exchange valve Download PDF

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Publication number
EP3822462A1
EP3822462A1 EP20205815.2A EP20205815A EP3822462A1 EP 3822462 A1 EP3822462 A1 EP 3822462A1 EP 20205815 A EP20205815 A EP 20205815A EP 3822462 A1 EP3822462 A1 EP 3822462A1
Authority
EP
European Patent Office
Prior art keywords
valve seat
valve
base body
area
recess
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Withdrawn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
EP20205815.2A
Other languages
German (de)
French (fr)
Inventor
Georg Litzel
Bernhard Ritter
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.)
MAN Energy Solutions SE
Original Assignee
MAN Energy Solutions SE
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 MAN Energy Solutions SE filed Critical MAN Energy Solutions SE
Publication of EP3822462A1 publication Critical patent/EP3822462A1/en
Withdrawn legal-status Critical Current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
    • F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
    • 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
    • F01L3/12—Cooling of 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
    • F01L3/12—Cooling of valves
    • F01L3/16—Cooling of valves by means of a fluid flowing through or along valve, e.g. air
    • 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
    • F01L3/12—Cooling of valves
    • F01L3/16—Cooling of valves by means of a fluid flowing through or along valve, e.g. air
    • F01L3/18—Liquid cooling of valve
    • 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
    • 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
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream 
    • 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
    • F01L2301/00—Using particular materials
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • 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
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/01—Cooling
    • 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
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication
    • 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
    • F01L3/12—Cooling of valves
    • F01L3/14—Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve

Definitions

  • the invention relates to a valve seat insert of a gas exchange valve of an internal combustion engine.
  • the invention also relates to a gas exchange valve for an internal combustion engine.
  • gas exchange valves namely gas exchange valves on the inlet side, via which the cylinders of the internal combustion engine can be supplied with charge air or a charge air / fuel mixture, as well as outlet changeover valves via which exhaust gas can be discharged from the cylinders of the internal combustion engine.
  • Each gas exchange valve of an internal combustion engine has a valve body, a valve seat ring cooperating with the valve body.
  • the valve body rests or sits on a valve seat of the valve seat insert, whereas when the gas exchange valve is open the valve body does not rest on the valve seat of the valve seat insert but is removed or lifted from the valve seat of the valve seat insert.
  • valve seat ring of a gas exchange valve of an internal combustion engine which is designed as a cooled valve seat ring.
  • the valve seat ring has a base body which is composed of several parts, namely of at least two ring parts which are connected to one another via a soldered seam. These two ring parts define a coolant channel for cooling the valve seat insert.
  • valve seat insert of a gas exchange valve of an internal combustion engine is known.
  • the valve seat ring disclosed there has a base body which is designed in one piece and defines a throughflow opening.
  • a valve seat area, which forms a valve seat, is connected to the base body, the valve seat ring being produced by hot isostatic pressing.
  • a coolant channel for cooling the valve seat ring can be introduced into the one-piece base body.
  • valve seat insert for a gas exchange valve of an internal combustion engine is known. It is proposed here that the valve seat ring consist of different materials.
  • a three-dimensional structure is formed from a first material, cavities of the three-dimensional structure being filled by a second material, the first material having a higher strength compared to the second material and the second material having a higher thermal conductivity compared to the first material.
  • a valve seat area, which forms the actual valve seat, is made of a third material, the third material having a high ductility compared to the first material and compared to the second material.
  • the present invention is based on the object of creating a novel valve seat insert of a gas exchange valve and a gas exchange valve with such a valve seat insert.
  • a valve seat insert according to claim 1.
  • at least one recess which is at least partially filled with a solder material, is made at least in the base body and preferably also in the valve seat area. Via the at least one recess filled with solder material, heat can be effectively dissipated from the valve seat ring, in particular from the valve seat area of the same.
  • the at least one recess filled with the solder material is preferably made in the base body and in the valve seat area, which recess preferably penetrates the valve seat area up to the valve seat.
  • the brazing material can not only be used to dissipate heat, but also as a lubricating material in the area of the valve seat in order to reduce wear on the valve seat insert.
  • An insert body is preferably placed in the respective recess which is fixed in the recess via the solder material, the insert body serving for lubrication and / or heat conduction and / or armoring.
  • the wear of the valve seat insert can be further reduced via the insert body, which is fixed in the respective recess by the solder material.
  • valve seat insert according to claim 10.
  • the valve seat area is built up in layers from layers of different metallic materials that form concentric rings on the valve seat. This also makes it possible to dissipate heat from the valve seat area and to reduce wear on the valve seat insert.
  • the gas exchange valve according to the invention is defined in claim 12.
  • FIGs 1, 1a and 1b show details of a first valve seat ring 10 according to the invention according to a first aspect of the present invention.
  • the valve seat ring 10 has a base body 11 which defines a throughflow opening 12, wherein in the in Figures 1, 1a and 1b The embodiment shown, the base body 11 is formed in one piece.
  • the valve seat ring 10 has a valve seat area 13 which is formed on a section of the base body 11, one surface of this valve seat area 13 forming a valve seat 14 of the valve seat area 13 and thus of the valve seat ring 10, which interacts during operation with a valve body (not shown) of a gas exchange valve.
  • the main body 11 is in the embodiment of Figures 1, 1a and 1b at least one recess 15 introduced, which is at least partially, in the embodiment of Figures 1a, 1b and 1c is completely filled with a solder material 15.
  • This recess 15 is in Figures 1, 1a and 1b introduced exclusively into the base body 11, namely in such a way that the recess 15 extends in the axial direction from the base body 11 in the direction of the valve seat area 13 and ends at a distance in front of the valve seat area 13.
  • the soldering material 16 is introduced into this recess 15, which then serves to conduct heat in order to dissipate heat from the valve seat ring 11, namely from the valve seat area 13 thereof.
  • Figures 1a and 1b show intermediate steps for the production of the in Fig. 1 valve seat insert shown 10. So shows Fig. 1a a state in which the recess 15 is made in the base body 11.
  • a semifinished product 17 made of the solder material 16 is arranged in an area above the recess 15. By heating this assembly of the Figure 1b If the semi-finished product 17 is liquefied from the solder material 16 and can enter the recess 15, for example by vacuum soldering. After cooling, the recess 15 is filled with solder material 16.
  • a second embodiment of a valve seat ring 20 according to the invention according to the first aspect of the invention shows Fig. 2 , in which Figures 2a and 2b again show intermediate states of the same in the manufacture of the same.
  • the valve seat ring 20 of the Fig. 2 in turn has a base body 21 which defines a throughflow opening 22, the base body 21 in the exemplary embodiment in FIG Fig. 2 consists in two parts of the two parts 21a, 21b, which are connected to one another along a joint 28, in particular by soldering.
  • the two parts 21a, 21b define a coolant space 29 through which, for example, water flows during operation.
  • valve seat ring 20 On a section of the base body 21, the valve seat ring 20 has a valve seat area 23, the surface of which forms the valve seat 24.
  • At least one recess 25 is made, which is at least partially, completely in the illustrated embodiment, filled with the solder material 26, according to FIG Fig. 2 such that the solder material 26 also covers a lower section of the coolant space 29, namely adjacent to the respective recess 25.
  • the recess 25 is in turn introduced exclusively into the base body 21, in such a way that the recess 25 extends from the base body 21 in the direction of the valve seat area 23 when viewed in the axial direction of the flow opening 22 and ends at a distance in front of the valve seat area 23.
  • Fig. 3 shows a third embodiment of a valve seat ring 30 according to the invention according to the first aspect of the invention, the base body 31 of which is formed in several parts from the parts 31a and 31b, which along the joint 38 in analogy to the embodiment of FIG Figures 2, 2a and 2b are connected to one another and define the coolant space 39.
  • the base body 31 in turn defines the throughflow opening 32, the valve seat region 33, which forms the valve seat 34, being formed on a section of the base body 31. Also in the embodiment of Fig. 3 there is at least one recess 35 filled with solder material 36, wherein in the exemplary embodiment the Fig. 3 the recess 35 is made on the one hand in the valve seat area 33 and on the other hand in the base body 31.
  • the recess 35 is in the exemplary embodiment Fig. 3 designed in such a way that the recess 35 extends in the axial direction of the throughflow opening 32 from the valve seat area 33, which forms the valve seat 34, in the direction of the base body 31 into the base body 31, but without penetrating the base body 31.
  • Solder material 36 is introduced into the respective recess 35, which then not only serves to dissipate heat from the valve seat area 33, but also to lubricate the valve seat 34 in order to reduce wear on the valve seat ring 30 during operation.
  • FIG Figures 4, 4a and 4b Another embodiment of a valve seat ring 40 according to the invention according to the first aspect of the invention and intermediate states in the production of the same are shown in FIG Figures 4, 4a and 4b shown.
  • the valve seat ring 40 of the Fig. 4 in turn has a multi-part base body 41 made up of the parts 41a and 41b connected in the area of the joint 48, which defines a throughflow opening 42, with the valve seat area 43 being formed on a section of the base body 41, which forms the valve seat 44. Also in Fig.
  • At least one recess 45 is made in the base body 41 and in the valve seat area 43, which is filled with soldering material 46, this recess 45 extending from the base body 41 in the direction of the valve seat area 43, into and through the valve seat area 43 through it, so that as in Fig. 3 the solder material 46 in the area of the valve seat 44 can be used for lubrication and additionally for heat dissipation in the direction of the coolant channel 49, but in FIG Fig. 4 the solder material 46 can come into contact with the cooling liquid flowing through the coolant channel 49.
  • the procedure is to provide a base body 41 with the valve seat area 43, starting from the base body 41, namely from part 41b of the same, the recess 45 is made in the base body 41 and the valve seat area 43, but without the valve seat area 43 initially to penetrate completely.
  • a semi-finished product 47 made of the solder material 46 is then provided and heated, this in accordance with FIG Figure 4b the solder material 46 enters the respective recess 45 and fills the same.
  • the valve seat area 43 is then machined by removing material in order to form the valve seat ring 40, in which the solder material 46 is accessible in the area of the valve seat 44 and can be used here for lubrication to reduce wear.
  • Fig. 5 shows an embodiment of a valve seat ring 50 according to the first aspect of the invention, which in turn comprises a base body 51 from the two parts 51a and 51b connected by soldering in the area of the joint 58, which define a coolant space 59.
  • the base body 51 of the valve seat ring 50 of the Fig. 5 in turn defines the throughflow opening 52 and has a valve seat area 53 which forms the actual valve seat 54.
  • At least one recess 55 is made in the base body 51 and in the valve seat area 53, which recess extends through the base body 51, namely the part 51b, and the valve seat area 53, although in the exemplary embodiment the Fig. 5 in contrast to the embodiment of Fig. 4
  • the recess 55 not only the solder material 56 is introduced, but also an insert body 57 which is fixed via the solder material 56 in the respective recess 55 and is therefore held.
  • the material of the insert body 57 which is accessible in the area of the valve seat 54, can provide a defined lubrication and / or heat conduction and / or armoring in the area of the valve seat 54 in order to further reduce the susceptibility of the valve seat ring 50 to wear.
  • FIG. 6 An embodiment of a valve seat insert 60 according to a second aspect of the invention shows Fig. 6 .
  • the valve seat ring 60 in turn has a base body 61, which consists of the parts 61a and 61b.
  • the parts 61a, 61b are connected along the joint 68 and define a coolant space 69 for coolant.
  • the base body 61 defines a throughflow opening 62 and has a valve seat area 63, the surface of which provides the actual valve seat 64.
  • the valve seat area 63 is built up in layers from several layers 65, 66 made of different metallic materials, which form concentric rings on the valve seat ring 64.
  • the layers 65 are preferably made of a highly ductile metallic material and the layers 66 are preferably made of a solder material, which is used for heat conduction and preferably for lubrication. These two metallic materials are each accessible in the area of the rings, which are formed by the layers 65, 66, in the area of the valve seat ring 64.
  • the invention further relates to a gas exchange valve with such a valve seat insert and a valve body which interacts with the valve seat of the respective valve seat insert.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lift Valve (AREA)

Abstract

Ventilsitzring (10) für ein Gaswechselventil eines Zylinders, mit einem eine Durchströmungsöffnung (12) definierenden, einteiligen oder mehrteiligen Grundkörper (11), mit einem an einem Abschnitt des Grundkörpers (11) im Bereich der Durchströmungsöffnung (12) ausgebildeten Ventilsitzbereich (13), wobei eine Oberfläche des Ventilsitzbereichs (13) einen Ventilsitz (14) für einen Ventilkörper des Gaswechselventils bildet, wobei zumindest in den Grundkörper (11) mindestens eine Ausnehmung (15) eingebracht ist, die zumindest teilweise mit einem Lotwerkstoff (16) befüllt ist. Fig. 1Valve seat ring (10) for a gas exchange valve of a cylinder, with a one-piece or multi-part base body (11) defining a flow opening (12), with a valve seat area (13) formed on a section of the base body (11) in the area of the flow opening (12), one surface of the valve seat area (13) forming a valve seat (14) for a valve body of the gas exchange valve, at least one recess (15) being made at least in the base body (11) which is at least partially filled with a solder material (16). Fig. 1

Description

Die Erfindung betrifft einen Ventilsitzring eines Gaswechselventils einer Brennkraftmaschine. Des Weiteren betrifft die Erfindung ein Gaswechselventil für eine Brennkraftmaschine.The invention relates to a valve seat insert of a gas exchange valve of an internal combustion engine. The invention also relates to a gas exchange valve for an internal combustion engine.

Aus der Praxis bekannte Brennkraftmaschinen verfügen über Gaswechselventile, nämlich über einlassseitige Gaswechselventile, über welche Zylindern der Brennkraftmaschine Ladeluft oder ein Ladeluft-Kraftsoff-Gemisch zugeführt werden kann, sowie über auslassseitige Wechselventile, über welche von den Zylindern der Brennkraftmaschine Abgas abgeführt werden kann.Internal combustion engines known from practice have gas exchange valves, namely gas exchange valves on the inlet side, via which the cylinders of the internal combustion engine can be supplied with charge air or a charge air / fuel mixture, as well as outlet changeover valves via which exhaust gas can be discharged from the cylinders of the internal combustion engine.

Jedes Gaswechselventil einer Brennkraftmaschine verfügt über einen Ventilkörper, wobei mit dem Ventilkörper ein Ventilsitzring zusammenwirkt. Bei geschlossenem Gaswechselventil liegt bzw. sitzt der Ventilkörper an einem Ventilsitz des Ventilsitzrings an bzw. auf, wohingegen bei geöffnetem Gaswechselventil der Ventilkörper nicht am Ventilsitz des Ventilsitzrings anliegt sondern vom Ventilsitz des Ventilsitzring entfernt bzw. abgehoben ist.Each gas exchange valve of an internal combustion engine has a valve body, a valve seat ring cooperating with the valve body. When the gas exchange valve is closed, the valve body rests or sits on a valve seat of the valve seat insert, whereas when the gas exchange valve is open the valve body does not rest on the valve seat of the valve seat insert but is removed or lifted from the valve seat of the valve seat insert.

Aus der DE 10 2004 027 084 A1 ist ein Ventilsitzring eines Gaswechselventils einer Brennkraftmaschine bekannt, der als gekühlter Ventilsitzring ausgebildet ist. Der Ventilsitzring verfügt dabei über einen Grundkörper, der aus mehreren Teilen zusammengesetzt ist, nämlich aus mindestens zwei Ringteilen, die über eine Lötnaht miteinander verbunden sind. Diese beiden Ringteile definieren einen Kühlmittelkanal zur Kühlung des Ventilsitzrings.From the DE 10 2004 027 084 A1 a valve seat ring of a gas exchange valve of an internal combustion engine is known, which is designed as a cooled valve seat ring. The valve seat ring has a base body which is composed of several parts, namely of at least two ring parts which are connected to one another via a soldered seam. These two ring parts define a coolant channel for cooling the valve seat insert.

Aus der DE 10 2011 007 140 A1 ist ein weiterer Ventilsitzring eines Gaswechselventils einer Brennkraftmaschine bekannt. Der dort offenbarte Ventilsitzring verfügt über einen Grundkörper, der einteilig ausgebildet ist und eine Durchströmungsöffnung definiert. Mit dem Grundkörper ist ein Ventilsitzbereich verbunden, der einen Ventilsitz ausbildet, wobei der Ventilsitzring durch heißisostatisches Pressen hergestellt ist. In den einteiligen Grundkörper kann ein Kühlmittelkanal zur Kühlung des Ventilsitzrings eingebracht sein.From the DE 10 2011 007 140 A1 Another valve seat insert of a gas exchange valve of an internal combustion engine is known. The valve seat ring disclosed there has a base body which is designed in one piece and defines a throughflow opening. A valve seat area, which forms a valve seat, is connected to the base body, the valve seat ring being produced by hot isostatic pressing. A coolant channel for cooling the valve seat ring can be introduced into the one-piece base body.

Aus der DE 10 2017 102 544 A1 ist ein weiterer Ventilsitzring für ein Gaswechselventil einer Brennkraftmaschine bekannt. Hier ist vorgeschlagen, dass der Ventilsitzring aus unterschiedlichen Werkstoffen besteht. So ist eine dreidimensionale Struktur von einem ersten Werkstoff ausgebildet, wobei Hohlräume der dreidimensionalen Struktur von einem zweiten Werkstoff gefüllt sind, wobei der erste Werkstoff im Vergleich zum zweiten Werkstoff eine höhere Festigkeit und der zweite Werkstoff im Vergleich zum ersten Werkstoff eine höhere Wärmeleitfähigkeit aufweist. Ein Ventilsitzbereich, der den eigentlichen Ventilsitz ausbildet, ist aus einem dritten Werkstoff gefertigt, wobei der dritte Werkstoff im Vergleich zum ersten Werkstoff und im Vergleich zum zweiten Werkstoff eine hohe Duktilität aufweist.From the DE 10 2017 102 544 A1 Another valve seat insert for a gas exchange valve of an internal combustion engine is known. It is proposed here that the valve seat ring consist of different materials. A three-dimensional structure is formed from a first material, cavities of the three-dimensional structure being filled by a second material, the first material having a higher strength compared to the second material and the second material having a higher thermal conductivity compared to the first material. A valve seat area, which forms the actual valve seat, is made of a third material, the third material having a high ductility compared to the first material and compared to the second material.

Es besteht Bedarf daran, einen Ventilsitzring weiter zu verbessern, insbesondere im Hinblick auf eine verbesserte Abfuhr von Wärme sowie im Hinblick auf einen reduzierten Verschleiß. Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, einen neuartigen Ventilsitzring eines Gaswechselventils und ein Gaswechselventil mit einem solchen Ventilsitzring zu schaffen.There is a need to further improve a valve seat insert, in particular with regard to improved dissipation of heat and with regard to reduced wear. Proceeding from this, the present invention is based on the object of creating a novel valve seat insert of a gas exchange valve and a gas exchange valve with such a valve seat insert.

Diese Aufgabe wird nach einem ersten Aspekt der Erfindung durch einen Ventilsitzring nach Anspruch 1 gelöst. Hiernach ist zumindest in den Grundkörper und vorzugsweise auch in den Ventilsitzbereich mindestens eine Ausnehmung eingebracht, die zumindest teilweise mit einem Lotwerkstoff befüllt ist. Über die mindestens eine mit Lotwerkstoff befüllte Ausnehmung kann Wärme effektiv vom Ventilsitzring abgeführt werden, insbesondere vom Ventilsitzbereich desselben. Vorzugsweise ist die mindestens eine mit dem Lotwerkstoff befüllte Ausnehmung in den Grundkörper und in den Ventilsitzbereich eingebracht, die den Ventilsitzbereich vorzugsweise bis zum Ventilsitz durchdringt. In diesem Fall kann dann der Lotwerkstoff nicht nur zur Wärmeableitung genutzt werden, sondern auch als Schmierwerkstoff im Bereich des Ventilsitzes, um den Verschleiß des Ventilsitzrings zu reduzieren.According to a first aspect of the invention, this object is achieved by a valve seat insert according to claim 1. According to this, at least one recess, which is at least partially filled with a solder material, is made at least in the base body and preferably also in the valve seat area. Via the at least one recess filled with solder material, heat can be effectively dissipated from the valve seat ring, in particular from the valve seat area of the same. The at least one recess filled with the solder material is preferably made in the base body and in the valve seat area, which recess preferably penetrates the valve seat area up to the valve seat. In this case, the brazing material can not only be used to dissipate heat, but also as a lubricating material in the area of the valve seat in order to reduce wear on the valve seat insert.

Vorzugsweise ist in der jeweiligen Ausnehmung ein Einsetzkörper platziert, der über den Lotwerkstoff in der Ausnehmung fixiert ist, wobei der Einsetzkörper der Schmierung und/oder Wärmeleitung und/oder Panzerung dient. Über den Einsetzkörper, der vom Lotwerkstoff in der jeweiligen Ausnehmung fixiert ist, kann der Verschleiß des Ventilsitzrings weiter reduziert werden.An insert body is preferably placed in the respective recess which is fixed in the recess via the solder material, the insert body serving for lubrication and / or heat conduction and / or armoring. The wear of the valve seat insert can be further reduced via the insert body, which is fixed in the respective recess by the solder material.

Nach einem zweiten Aspekt der Erfindung wird die Aufgabe durch einen Ventilsitzring nach Anspruch 10 gelöst. Hiernach ist der Ventilsitzbereich schichtweise aus Lagen unterschiedlicher metallischer Werkstoff aufgebaut, die am Ventilsitz konzentrische Ringe ausbilden. Auch hiermit ist es möglich, vom Ventilsitzbereich Wärme abzuführen und den Verschleiß des Ventilsitzrings zu reduzieren.According to a second aspect of the invention, the object is achieved by a valve seat insert according to claim 10. According to this, the valve seat area is built up in layers from layers of different metallic materials that form concentric rings on the valve seat. This also makes it possible to dissipate heat from the valve seat area and to reduce wear on the valve seat insert.

Das erfindungsgemäße Gaswechselventil ist in Anspruch 12.The gas exchange valve according to the invention is defined in claim 12.

Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ausführungsbeispiele der Erfindung werden, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt:

Fig. 1
einen Ausschnitt aus einem ersten erfindungsgemäßen Ventilsitzrings eines Gaswechselventils nach dem ersten Aspekt der Erfindung,
Fig. 1a, 1b Fig. 2
Zwischenzustände bei der Herstellung des Ventilsitzrings der Fig. 1, einen Ausschnitt aus einem zweiten erfindungsgemäßen Ventilsitzrings eines Gaswechselventils nach dem ersten Aspekt der Erfindung,
Fig. 2a, 2b Fig. 3
Zwischenzustände bei der Herstellung des Ventilsitzrings der Fig. 2, einen Ausschnitt aus einem dritten erfindungsgemäßen Ventilsitzrings eines Gaswechselventils nach dem ersten Aspekt der Erfindung,
Fig. 4
einen Ausschnitt aus einem vierten erfindungsgemäßen Ventilsitzrings eines Gaswechselventils nach dem ersten Aspekt der Erfindung,
Fig. 4a, 4b Fig. 5
Zwischenzustände bei der Herstellung des Ventilsitzrings der Fig. 4, einen Ausschnitt aus einem fünften erfindungsgemäßen Ventilsitzrings eines Gaswechselventils nach dem ersten Aspekt der Erfindung,
Fig. 6
einen Ausschnitt aus einem erfindungsgemäßen Ventilsitzrings eines Gaswechselventils nach dem zweiten Aspekt der Erfindung.
Preferred developments of the invention emerge from the subclaims and the following description. Exemplary embodiments of the invention are explained in more detail with reference to the drawing, without being restricted thereto. It shows:
Fig. 1
a section of a first valve seat ring according to the invention of a gas exchange valve according to the first aspect of the invention,
Fig. 1a, 1b Fig. 2
Intermediate states in the manufacture of the valve seat insert Fig. 1 , a section from a second valve seat ring according to the invention of a gas exchange valve according to the first aspect of the invention,
Fig. 2a, 2b Fig. 3
Intermediate states in the manufacture of the valve seat insert Fig. 2 , a section from a third valve seat ring according to the invention of a gas exchange valve according to the first aspect of the invention,
Fig. 4
a section of a fourth valve seat ring according to the invention of a gas exchange valve according to the first aspect of the invention,
Fig. 4a, 4b Fig. 5
Intermediate states in the manufacture of the valve seat insert Fig. 4 , a section from a fifth valve seat ring according to the invention of a gas exchange valve according to the first aspect of the invention,
Fig. 6
a section of a valve seat ring according to the invention of a gas exchange valve according to the second aspect of the invention.

Fig. 1, 1a und 1b zeigen Details eines ersten erfindungsgemäßen Ventilsitzrings 10 nach einem ersten Aspekt der hier vorliegenden Erfindung. Der Ventilsitzring 10 verfügt über einen Grundkörper 11, der eine Durchströmungsöffnung 12 definiert, wobei in dem in Fig. 1, 1a und 1b gezeigten Ausführungsbeispiel der Grundkörper 11 einteilig ausgebildet ist. Figures 1, 1a and 1b show details of a first valve seat ring 10 according to the invention according to a first aspect of the present invention. The valve seat ring 10 has a base body 11 which defines a throughflow opening 12, wherein in the in Figures 1, 1a and 1b The embodiment shown, the base body 11 is formed in one piece.

Der Ventilsitzring 10 verfügt über einen Ventilsitzbereich 13, der an einem Abschnitt des Grundkörpers 11 ausgebildet ist, wobei eine Oberfläche dieses Ventilsitzbereichs 13 einen Ventilsitz 14 des Ventilsitzbereichs 13 und damit des Ventilsitzrings 10 ausbildet, der im Betrieb mit einem nicht gezeigten Ventilkörper eines Gaswechselventils zusammenwirkt.The valve seat ring 10 has a valve seat area 13 which is formed on a section of the base body 11, one surface of this valve seat area 13 forming a valve seat 14 of the valve seat area 13 and thus of the valve seat ring 10, which interacts during operation with a valve body (not shown) of a gas exchange valve.

In den Grundkörper 11 ist im Ausführungsbeispiel der Fig. 1, 1a und 1b mindestens eine Ausnehmung 15 eingebracht, die zumindest teilweise, im Ausführungsbeispiel der Fig. 1a, 1b und 1c vollständig, mit einem Lotwerkstoff 15 befüllt ist.In the main body 11 is in the embodiment of Figures 1, 1a and 1b at least one recess 15 introduced, which is at least partially, in the embodiment of Figures 1a, 1b and 1c is completely filled with a solder material 15.

Diese Ausnehmung 15 ist dabei in Fig. 1,1a und 1b ausschließlich in den Grundkörper 11 eingebracht, nämlich derart, dass sich die Ausnehmung 15 in Axialrichtung von dem Grundkörper 11 in Richtung auf den Ventilsitzbereich 13 erstreckt und mit Abstand vor dem Ventilsitzbereich 13 endet. In diese Ausnehmung 15 ist der Lotwerkstoff 16 eingebracht, der dann der Wärmeleitung dient, um vom Ventilsitzring 11, nämlich vom Ventilsitzbereich 13 desselben, Wärme abzuführen.This recess 15 is in Figures 1, 1a and 1b introduced exclusively into the base body 11, namely in such a way that the recess 15 extends in the axial direction from the base body 11 in the direction of the valve seat area 13 and ends at a distance in front of the valve seat area 13. The soldering material 16 is introduced into this recess 15, which then serves to conduct heat in order to dissipate heat from the valve seat ring 11, namely from the valve seat area 13 thereof.

Fig. 1a und 1b zeigen Zwischenschritte zur Herstellung des in Fig. 1 gezeigten Ventilsitzrings 10. So zeigt Fig. 1a einen Zustand, in welchem in den Grundkörper 11 die Ausnehmung 15 eingebracht ist. In Fig. 1b ist in einem Bereich oberhalb der Ausnehmung 15 ein Halbzeug 17 aus dem Lotwerkstoff 16 angeordnet. Durch Erhitzen dieser Anordnung der Fig. 1b wird das Halbzeug 17 aus dem Lotwerkstoff 16 verflüssigt und kann in die Ausnehmung 15 z.B. durch Vakuumlöten eintreten. Nach dem Abkühlen ist die Ausnehmung 15 mit Lotwerkstoff 16 befüllt. Figures 1a and 1b show intermediate steps for the production of the in Fig. 1 valve seat insert shown 10. So shows Fig. 1a a state in which the recess 15 is made in the base body 11. In Figure 1b a semifinished product 17 made of the solder material 16 is arranged in an area above the recess 15. By heating this assembly of the Figure 1b If the semi-finished product 17 is liquefied from the solder material 16 and can enter the recess 15, for example by vacuum soldering. After cooling, the recess 15 is filled with solder material 16.

Ein zweites Ausführungsbeispiel eines erfindungsgemäßen Ventilsitzrings 20 nach dem ersten Aspekt der Erfindung zeigt Fig. 2, wobei Fig. 2a und 2b wiederum Zwischenzustände desselben bei der Herstellung desselben zeigen.A second embodiment of a valve seat ring 20 according to the invention according to the first aspect of the invention shows Fig. 2 , in which Figures 2a and 2b again show intermediate states of the same in the manufacture of the same.

Der Ventilsitzring 20 der Fig. 2 verfügt wiederum über einen Grundkörper 21, der eine Durchströmungsöffnung 22 definiert, wobei der Grundkörper 21 im Ausführungsbeispiel der Fig. 2 zweiteilig aus den beiden Teilen 21a, 21b besteht, die entlang einer Stoßstelle 28 miteinander verbunden sind, insbesondere durch Löten. Die beiden Teile 21a, 21b definieren einen Kühlmittelraum 29, der im Betrieb zum Beispiel von Wasser durchströmt ist.The valve seat ring 20 of the Fig. 2 in turn has a base body 21 which defines a throughflow opening 22, the base body 21 in the exemplary embodiment in FIG Fig. 2 consists in two parts of the two parts 21a, 21b, which are connected to one another along a joint 28, in particular by soldering. The two parts 21a, 21b define a coolant space 29 through which, for example, water flows during operation.

Der Ventilsitzring 20 weist an einem Abschnitt des Grundkörpers 21 einen Ventilsitzbereich 23 auf, dessen Oberfläche den Ventilsitz 24 ausbildet.On a section of the base body 21, the valve seat ring 20 has a valve seat area 23, the surface of which forms the valve seat 24.

In den Grundkörper 21, nämlich in das Teil 21b desselben, ist wiederum mindestens eine Ausnehmung 25 eingebracht, die zumindest teilweise, im gezeigten Ausführungsbeispiel vollständig, mit dem Lotwerkstoff 26 befüllt ist, und zwar gemäß Fig. 2 derart, dass der Lotwerkstoff 26 auch einen unteren Abschnitt des Kühlmittelraums 29 überdeckt, nämlich angrenzend an die jeweilige Ausnehmung 25.In the base body 21, namely in the part 21b of the same, in turn at least one recess 25 is made, which is at least partially, completely in the illustrated embodiment, filled with the solder material 26, according to FIG Fig. 2 such that the solder material 26 also covers a lower section of the coolant space 29, namely adjacent to the respective recess 25.

Dabei ist in Fig. 2 die Ausnehmung 25 wiederum ausschließlich in den Grundkörper 21 eingebracht, und zwar derart, dass sich die Ausnehmung 25 in Axialrichtung der Durchströmungsöffnung 22 gesehen vom Grundkörper 21 in Richtung auf den Ventilsitzbereich 23 erstreckt und mit Abstand vor dem Ventilsitzbereich 23 endet.In Fig. 2 the recess 25 is in turn introduced exclusively into the base body 21, in such a way that the recess 25 extends from the base body 21 in the direction of the valve seat area 23 when viewed in the axial direction of the flow opening 22 and ends at a distance in front of the valve seat area 23.

Zur Herstellung des Ventilsitzrings 20 der Fig. 2 wird gemäß Fig. 2a und 2b so vorgegangen, dass in das Teil 21b des Grundkörpers 21 die Ausnehmung 25 eingebracht wird, anschließend ein Halbzeug 27 aus dem Lötwerkstoff 26 im Bereich der Ausnehmung 25 platziert wird und durch Erhitzen dieser Anordnung das Halbzeug 27 verflüssigt wird, sodass der Lotwerkstoff 26 in die jeweilige Ausnehmung 25 eintreten kann.To produce the valve seat ring 20 of the Fig. 2 is according to Figures 2a and 2b proceed in such a way that the recess 25 is made in the part 21b of the base body 21, then a semifinished product 27 made of the soldering material 26 is placed in the area of the recess 25 and the semifinished product 27 is liquefied by heating this arrangement, so that the soldering material 26 is in the respective Recess 25 can occur.

Fig. 3 zeigt ein drittes Ausführungsbeispiel eines erfindungsgemäßen Ventilsitzrings 30 nach dem ersten Aspekt der Erfindung, dessen Grundkörper 31 mehrteilig aus den Teilen 31a und 31b gebildet ist, die entlang der Stoßstelle 38 in Analogie zum Ausführungsbeispiel der Fig. 2, 2a und 2b miteinander verbunden sind und den Kühlmittelraum 39 definieren. Fig. 3 shows a third embodiment of a valve seat ring 30 according to the invention according to the first aspect of the invention, the base body 31 of which is formed in several parts from the parts 31a and 31b, which along the joint 38 in analogy to the embodiment of FIG Figures 2, 2a and 2b are connected to one another and define the coolant space 39.

Der Grundkörper 31 definiert wiederum die Durchströmungsöffnung 32, wobei an einem Abschnitt des Grundkörpers 31 der Ventilsitzbereich 33 ausgebildet ist, der den Ventilsitz 34 ausbildet. Auch im Ausführungsbeispiel der Fig. 3 ist mindestens eine mit Lotwerkstoff 36 befüllte Ausnehmung 35 vorhanden, wobei in dem Ausführungsbeispiel der Fig. 3 die Ausnehmung 35 einerseits in den Ventilsitzbereich 33 und andererseits in den Grundkörper 31 eingebracht ist.The base body 31 in turn defines the throughflow opening 32, the valve seat region 33, which forms the valve seat 34, being formed on a section of the base body 31. Also in the embodiment of Fig. 3 there is at least one recess 35 filled with solder material 36, wherein in the exemplary embodiment the Fig. 3 the recess 35 is made on the one hand in the valve seat area 33 and on the other hand in the base body 31.

Die Ausnehmung 35 ist im Ausführungsbeispiel der Fig. 3 derart ausgeführt, dass sich die Ausnehmung 35 in Axialrichtung der Durchströmungsöffnung 32 von dem Ventilsitzbereich 33, der den Ventilsitz 34 ausbildet, in Richtung auf den Grundkörper 31 in den Grundkörper 31 hinein erstreckt, ohne den Grundkörper 31 jedoch zu durchdringen. In die jeweilige Ausnehmung 35 ist Lotwerkstoff 36 eingebracht, der dann nicht nur der Wärmeableitung vom Ventilsitzbereich 33 dient, sondern auch der Schmierung des Ventilsitzes 34, um den Verschleiß des Ventilsitzrings 30 im Betrieb zu reduzieren.The recess 35 is in the exemplary embodiment Fig. 3 designed in such a way that the recess 35 extends in the axial direction of the throughflow opening 32 from the valve seat area 33, which forms the valve seat 34, in the direction of the base body 31 into the base body 31, but without penetrating the base body 31. Solder material 36 is introduced into the respective recess 35, which then not only serves to dissipate heat from the valve seat area 33, but also to lubricate the valve seat 34 in order to reduce wear on the valve seat ring 30 during operation.

Ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Ventilsitzrings 40 nach dem ersten Aspekt der Erfindung sowie Zwischenzustände bei der Herstellung desselben sind in Fig. 4, 4a und 4b gezeigt. Der Ventilsitzring 40 der Fig. 4 verfügt wiederum über einen mehrteiligen Grundkörper 41 aus den im Bereich der Stoßstelle 48 verbunden Teilen 41a und 41b, der eine Durchströmungsöffnung 42 definiert, wobei an einem Abschnitt des Grundkörpers 41 der Ventilsitzbereich 43 ausgebildet ist, welcher den Ventilsitz 44 ausbildet. Auch in Fig. 4 sind in den Grundkörper 41 sowie in den Ventilsitzbereich 43 mindestens eine Ausnehmung 45 eingebracht, die mit Lötwerkstoff 46 befüllt ist, wobei sich diese Ausnehmung 45 ausgehend vom Grundkörper 41 in Richtung auf den Ventilsitzbereich 43 erstreckt, und zwar in den Ventilsitzbereich 43 hinein sowie durch denselben hindurch, sodass wie in Fig. 3 der Lotwerkstoff 46 im Bereich des Ventilsitzes 44 der Schmierung dienen kann und zusätzlich der Wärmeableitung in Richtung auf den Kühlmittelkanal 49, wobei jedoch in Fig. 4 der Lotwerkstoff 46 mit der den Kühlmittelkanal 49 durchströmenden Kühlflüssigkeit in Kontakt kommen kann.Another embodiment of a valve seat ring 40 according to the invention according to the first aspect of the invention and intermediate states in the production of the same are shown in FIG Figures 4, 4a and 4b shown. The valve seat ring 40 of the Fig. 4 in turn has a multi-part base body 41 made up of the parts 41a and 41b connected in the area of the joint 48, which defines a throughflow opening 42, with the valve seat area 43 being formed on a section of the base body 41, which forms the valve seat 44. Also in Fig. 4 At least one recess 45 is made in the base body 41 and in the valve seat area 43, which is filled with soldering material 46, this recess 45 extending from the base body 41 in the direction of the valve seat area 43, into and through the valve seat area 43 through it, so that as in Fig. 3 the solder material 46 in the area of the valve seat 44 can be used for lubrication and additionally for heat dissipation in the direction of the coolant channel 49, but in FIG Fig. 4 the solder material 46 can come into contact with the cooling liquid flowing through the coolant channel 49.

Zur Herstellung des in Fig. 4 gezeigten Ventilsitzrings 40 wird so vorgegangen, dass ein Grundkörper 41 mit dem Ventilsitzbereich 43 bereitgestellt wird, wobei ausgehend vom Grundkörper 41, nämlich vom Teil 41b desselben, die Ausnehmung 45 in den Grundkörper 41 und den Ventilsitzbereich 43 eingebracht ist, ohne jedoch den Ventilsitzbereich 43 zunächst vollständig zu durchdringen. Dabei wird dann ein Halbzeug 47 aus dem Lotwerkstoff 46 bereitgestellt und erwärmt, wobei hierdurch gemäß Fig. 4b der Lotwerkstoff 46 in die jeweilige Ausnehmung 45 eintritt und dieselbe befüllt. Anschließend wird der Ventilsitzbereich 43 durch Materialabtrag bearbeitet, um den Ventilsitzring 40 auszubilden, bei welchem der Lotwerkstoff 46 im Bereich des Ventilsitzes 44 zugänglich ist und hier der Schmierung zur Verschleißreduzierung dienen kann.To produce the in Fig. 4 The procedure is to provide a base body 41 with the valve seat area 43, starting from the base body 41, namely from part 41b of the same, the recess 45 is made in the base body 41 and the valve seat area 43, but without the valve seat area 43 initially to penetrate completely. In this case, a semi-finished product 47 made of the solder material 46 is then provided and heated, this in accordance with FIG Figure 4b the solder material 46 enters the respective recess 45 and fills the same. The valve seat area 43 is then machined by removing material in order to form the valve seat ring 40, in which the solder material 46 is accessible in the area of the valve seat 44 and can be used here for lubrication to reduce wear.

Fig. 5 zeigt ein Ausführungsbeispiel eines Ventilsitzrings 50 nach dem ersten Aspekt der Erfindung, der wiederum einen Grundkörper 51 aus den beiden im Bereich der Stoßstelle 58 durch Löten verbunden Teilen 51a und 51b umfasst, die einen Kühlmittelraum 59 definieren. Der Grundkörper 51 des Ventilsitzrings 50 der Fig. 5 definiert wiederum die Durchströmungsöffnung 52 und weist einen Ventilsitzbereich 53 auf, der den eigentlichen Ventilsitz 54 ausbildet. Fig. 5 shows an embodiment of a valve seat ring 50 according to the first aspect of the invention, which in turn comprises a base body 51 from the two parts 51a and 51b connected by soldering in the area of the joint 58, which define a coolant space 59. The base body 51 of the valve seat ring 50 of the Fig. 5 in turn defines the throughflow opening 52 and has a valve seat area 53 which forms the actual valve seat 54.

In Analogie zum Ausführungsbeispiel der Fig. 4 ist in den Grundkörper 51 sowie in den Ventilsitzbereich 53 mindestens eine Ausnehmung 55 eingebracht, die sich durch den Grundkörper 51, nämlich das Teil 51b, und den Ventilsitzbereich 53 hindurch erstreckt, wobei jedoch im Ausführungsbeispiel der Fig. 5 im Unterschied zum Ausführungsbeispiel der Fig. 4 in die Ausnehmung 55 nicht nur der Lotwerkstoff 56 eingebracht ist, sondern zusätzlich ein Einsetzkörper 57, der über den Lotwerkstoff 56 in der jeweiligen Ausnehmung 55 fixiert und demnach gehalten ist. Über den Werkstoff des Einsetzkörpers 57, der im Bereich des Ventilsitzes 54 zugänglich ist, kann eine definierte Schmierung und/oder Wärmeleitung und/oder Panzerung im Bereich des Ventilsitzes 54 bereitgestellt werden, um die Verschleißanfälligkeit des Ventilsitzrings 50 weiter zu reduzieren.In analogy to the exemplary embodiment of Fig. 4 at least one recess 55 is made in the base body 51 and in the valve seat area 53, which recess extends through the base body 51, namely the part 51b, and the valve seat area 53, although in the exemplary embodiment the Fig. 5 in contrast to the embodiment of Fig. 4 In the recess 55 not only the solder material 56 is introduced, but also an insert body 57 which is fixed via the solder material 56 in the respective recess 55 and is therefore held. The material of the insert body 57, which is accessible in the area of the valve seat 54, can provide a defined lubrication and / or heat conduction and / or armoring in the area of the valve seat 54 in order to further reduce the susceptibility of the valve seat ring 50 to wear.

Ein Ausführungsbeispiel eines Ventilsitzrings 60 nach einem zweiten Aspekt der Erfindung zeigt Fig. 6. Der Ventilsitzring 60 verfügt wiederum über einen Grundkörper 61, der aus den Teilen 61a und 61b besteht. Die Teile 61a, 61b sind entlang der Stoßstelle 68 verbunden und definieren einen Kühlmittelraum 69 für Kühlmittel, Der Grundkörper 61 definiert eine Durchströmungsöffnung 62 und weist einen Ventilsitzbereich 63 auf, dessen Oberfläche den eigentlichen Ventilsitz 64 bereitstellt.An embodiment of a valve seat insert 60 according to a second aspect of the invention shows Fig. 6 . The valve seat ring 60 in turn has a base body 61, which consists of the parts 61a and 61b. The parts 61a, 61b are connected along the joint 68 and define a coolant space 69 for coolant. The base body 61 defines a throughflow opening 62 and has a valve seat area 63, the surface of which provides the actual valve seat 64.

Nach dem zweiten Aspekt der Erfindung ist der Ventilsitzbereich 63 schichtweise aus mehreren Lagen 65, 66 aus unterschiedlichen metallischen Werkstoffen aufgebaut, die am Ventilsitzring 64 konzentrische Ringe ausbilden. So sind die Lagen 65 vorzugsweise aus einem hochduktilen metallischen Werkstoff und die Lagen 66 vorzugsweise aus einem Lotwerkstoff gebildet, welcher der Wärmeleitung und vorzugsweise Schmierung dient. Diese beiden metallischen Werkstoffe sind jeweils im Bereich der Ringe, die von den Lagen 65, 66 ausgebildet sind, im Bereich des Ventilsitzrings 64 zugänglich.According to the second aspect of the invention, the valve seat area 63 is built up in layers from several layers 65, 66 made of different metallic materials, which form concentric rings on the valve seat ring 64. The layers 65 are preferably made of a highly ductile metallic material and the layers 66 are preferably made of a solder material, which is used for heat conduction and preferably for lubrication. These two metallic materials are each accessible in the area of the rings, which are formed by the layers 65, 66, in the area of the valve seat ring 64.

Die Erfindung betrifft weiterhin ein Gaswechselventil mit einem solchen Ventilsitzring und einem Ventilkörper, der mit dem Ventilsitz des jeweiligen Ventilsitzrings zusammenwirkt.The invention further relates to a gas exchange valve with such a valve seat insert and a valve body which interacts with the valve seat of the respective valve seat insert.

BezugszeichenlisteList of reference symbols

1010
VentilsitzringValve seat insert
1111
GrundkörperBase body
1212th
DurchströmungsöffnungThroughflow opening
1313th
VentilsitzbereichValve seat area
1414th
VentilsitzValve seat
1515th
AusnehmungRecess
1616
LotwerkstoffBrazing material
1717th
HalbzeugWorkpiece
2020th
VentilsitzringValve seat insert
2121
GrundkörperBase body
21a, 21b21a, 21b
Teilpart
2222nd
DurchströmungsöffnungThroughflow opening
2323
VentilsitzbereichValve seat area
2424
VentilsitzValve seat
2525th
AusnehmungRecess
2626th
LotwerkstoffBrazing material
2727
HalbzeugWorkpiece
2828
StoßstelleJoint
2929
KühlmittelraumCoolant compartment
3030th
VentilsitzringValve seat insert
3131
GrundkörperBase body
31a, 31b31a, 31b
Teilpart
3232
DurchströmungsöffnungThroughflow opening
3333
VentilsitzbereichValve seat area
3434
VentilsitzValve seat
3535
AusnehmungRecess
3636
LotwerkstoffBrazing material
3838
StoßstelleJoint
3939
KühlmittelraumCoolant compartment
4040
VentilsitzringValve seat insert
4141
GrundkörperBase body
41a, 41b41a, 41b
Teilpart
4242
DurchströmungsöffnungThroughflow opening
4343
VentilsitzbereichValve seat area
4444
VentilsitzValve seat
4545
AusnehmungRecess
4747
HalbzeugWorkpiece
4646
LotwerkstoffBrazing material
4848
StoßstelleJoint
4949
KühlmittelraumCoolant compartment
5050
VentilsitzringValve seat insert
5151
GrundkörperBase body
51a, 51b51a, 51b
Teilpart
5252
DurchströmungsöffnungThroughflow opening
5353
VentilsitzbereichValve seat area
5454
VentilsitzValve seat
5555
AusnehmungRecess
5656
LotwerkstoffBrazing material
5757
EinsetzkörperInsert body
5858
StoßstelleJoint
5959
KühlmittelraumCoolant compartment
6060
VentilsitzringValve seat insert
6161
GrundkörperBase body
61a, 61b61a, 61b
Teilpart
6262
DurchströmungsöffnungThroughflow opening
6363
VentilsitzbereichValve seat area
6464
VentilsitzValve seat
6565
Lagelocation
6666
Lagelocation
6868
StoßstelleJoint
6969
KühlmittelraumCoolant compartment

Claims (12)

Ventilsitzring (10, 20, 30, 40, 50) für ein Gaswechselventil eines Zylinders einer Brennkraftmaschine, mit einem eine Durchströmungsöffnung (12, 22, 32, 42, 52) definierenden, einteiligen oder mehrteiligen Grundkörper (11, 21, 31, 41, 51), mit einem an einem Abschnitt des Grundkörpers (11, 21, 31, 41, 51) im Bereich der Durchströmungsöffnung (12, 22, 32, 42, 52) ausgebildeten Ventilsitzbereich (13, 23, 33, 43, 53), wobei eine Oberfläche des Ventilsitzbereichs (13, 23, 33, 43, 53) einen Ventilsitz (14, 24, 34, 44, 54) für einen Ventilkörper des Gaswechselventils bildet, dadurch gekennzeichnet, dass zumindest in den Grundkörper (11, 21, 31, 41, 51) mindestens eine Ausnehmung (15, 25, 35, 45, 55) eingebracht ist, die zumindest teilweise mit einem Lotwerkstoff (16, 26, 36, 46, 56) befüllt ist. Valve seat insert (10, 20, 30, 40, 50) for a gas exchange valve of a cylinder of an internal combustion engine, with a one-part or multi-part base body (11, 21, 31, 41, 51) defining a throughflow opening (12, 22, 32, 42, 52), with a valve seat area (13, 23, 33, 43, 53) formed on a section of the base body (11, 21, 31, 41, 51) in the area of the throughflow opening (12, 22, 32, 42, 52), one surface of the valve seat area (13, 23, 33, 43, 53) forms a valve seat (14, 24, 34, 44, 54) for a valve body of the gas exchange valve, characterized in that at least one recess (15, 25, 35, 45, 55) is made at least in the base body (11, 21, 31, 41, 51) which is at least partially filled with a solder material (16, 26, 36, 46, 56) is. Ventilsitzring nach Anspruch 1, dadurch gekennzeichnet, dass
die mindestens eine mit dem Lotwerkstoff (16, 26) befüllte Ausnehmung (15, 25) ausschließlich in den Grundkörper (11, 21) eingebracht ist, derart, dass sich die Ausnehmung (15, 25) in Axialrichtung der Durchströmungsöffnung (12, 22) von dem Grundkörper (11, 21) in Richtung auf den Ventilsitzbereich (13, 23) erstreckt und mit Abstand vor dem Ventilsitzbereich (13, 23) endet.Valve seat ring according to claim 1, characterized in that
the at least one recess (15, 25) filled with the solder material (16, 26) is introduced exclusively into the base body (11, 21) in such a way that the recess (15, 25) extends in the axial direction of the throughflow opening (12, 22) extends from the base body (11, 21) in the direction of the valve seat area (13, 23) and ends at a distance in front of the valve seat area (13, 23). Ventilsitzring nach Anspruch 2, dadurch gekennzeichnet, dass
der Lotwerkstoff (16, 26) der Wärmeleitung dient.Valve seat ring according to claim 2, characterized in that
the solder material (16, 26) is used for heat conduction. Ventilsitzring nach Anspruch 1, dadurch gekennzeichnet, dass
die mindestens eine mit dem Lotwerkstoff (36, 46, 56) befüllte Ausnehmung (35, 45, 55) in den Grundkörper (31, 41, 51) und in den Ventilsitzbereich (33, 43, 53) eingebracht ist.Valve seat ring according to claim 1, characterized in that
the at least one recess (35, 45, 55) filled with the solder material (36, 46, 56) is made in the base body (31, 41, 51) and in the valve seat area (33, 43, 53). Ventilsitzring nach Anspruch 4, dadurch gekennzeichnet, dass
sich die Ausnehmung (35) in Axialrichtung der Durchströmungsöffnung (32) von dem Ventilsitzbereich (33) in Richtung auf den Grundkörper (31) in den Grundköper hinein erstreckt, jedoch den Grundkörper (31) nicht durchdringt.Valve seat ring according to claim 4, characterized in that
the recess (35) extends in the axial direction of the throughflow opening (32) from the valve seat area (33) in the direction of the base body (31) into the base body, but does not penetrate the base body (31). Ventilsitzring nach Anspruch 5, dadurch gekennzeichnet, dass
der Lotwerkstoff (36) der Wärmeleitung und/oder Schmierung dient.Valve seat ring according to claim 5, characterized in that
the solder material (36) is used for heat conduction and / or lubrication. Ventilsitzring nach Anspruch 4, dadurch gekennzeichnet, dass
sich die Ausnehmung (45, 55) in Axialrichtung der Durchströmungsöffnung (42, 52) von dem Grundkörper (41, 52) in Richtung auf den Ventilsitzbereich (43, 53) in den Ventilsitzbereich hinein erstreckt und den Ventilsitzbereich (43, 53) sowie den Ventilsitz (44, 54) durchdringt,Valve seat ring according to claim 4, characterized in that
the recess (45, 55) extends in the axial direction of the throughflow opening (42, 52) from the base body (41, 52) in the direction of the valve seat area (43, 53) into the valve seat area and the valve seat area (43, 53) and the Valve seat (44, 54) penetrates, Ventilsitzring nach Anspruch 7, dadurch gekennzeichnet, dass
der Lotwerkstoff (46, 56) der Wärmeleitung und/oder Schmierung dient.Valve seat ring according to claim 7, characterized in that
the solder material (46, 56) is used for heat conduction and / or lubrication. Ventilsitzring nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass
in der jeweiligen Ausnehmung (55) ein Einsetzkörper (57) platziert ist, der über den Lotwerkstoff (56) in der Ausnehmung (55) fixiert ist,
der Einsetzkörper (57) der Schmierung und/oder Wärmeleitung und/oder Panzerung dient.Valve seat ring according to claim 7 or 8, characterized in that
an insert body (57) is placed in the respective recess (55) and is fixed in the recess (55) via the solder material (56),
the insert body (57) is used for lubrication and / or heat conduction and / or armoring. Ventilsitzring (60) für ein Gaswechselventil eines Zylinders einer Brennkraftmaschine, mit einem eine Durchströmungsöffnung (62) definierenden, einteiligen oder mehrteiligen Grundkörper (61), mit einem an einem Abschnitt des Grundkörpers (61) im Bereich der Durchströmungsöffnung (62) ausgebildeten Ventilsitzbereich (63), wobei eine Oberfläche des Ventilsitzbereichs (63) einen Ventilsitz (64) für einen Ventilkörper des Gaswechselventils, dadurch gekennzeichnet, dass der Ventilsitzbereich (63) schichtweise aus Lagen (65, 66) unterschiedlicher metallischer Werkstoff aufgebaut ist, die am Ventilsitz (64) konzentrische Ringe ausbilden. Valve seat ring (60) for a gas exchange valve of a cylinder of an internal combustion engine, with a one-part or multi-part base body (61) defining a throughflow opening (62), with a valve seat area (63) formed on a section of the base body (61) in the area of the throughflow opening (62), one surface of the valve seat area (63) having a valve seat (64) for a valve body of the gas exchange valve, characterized in that the valve seat area (63) is built up in layers from layers (65, 66) of different metallic materials which form concentric rings on the valve seat (64). Ventilsitzring Anspruch 10, dadurch gekennzeichnet, dass der Ventilsitzbereich (63) mehrere Lagen (65) aus einem hochduktilen metallischen Werkstoff und mehrere Lagen (66) aus einem Lotwerkstoff aufweist, wobei der Lotwerkstoff der Wärmeleitung und/oder Schmierung dient.Valve seat insert according to claim 10, characterized in that the valve seat area (63) has several layers (65) made of a highly ductile metallic material and several layers (66) made of a solder material, the solder material serving for heat conduction and / or lubrication. Gaswechselventil einer Brennkraftmaschine, mit einem Ventilkörper und mit einem Ventilsitzring (10, 20, 30, 40, 50, 60) für den Ventilkörper, dadurch gekennzeichnet, dass der Ventilsitzring (10, 20, 30, 40, 50, 60) nach einem der Ansprüche 1 bis 11 ausgebildet ist.Gas exchange valve of an internal combustion engine, with a valve body and with a valve seat ring (10, 20, 30, 40, 50, 60) for the valve body, characterized in that the valve seat ring (10, 20, 30, 40, 50, 60) according to one of the Claims 1 to 11 is formed.
EP20205815.2A 2019-11-15 2020-11-05 Gas exchange valve and valve seat ring of a gas exchange valve Withdrawn EP3822462A1 (en)

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CN112901305A (en) 2021-06-04
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US11193402B2 (en) 2021-12-07
JP2021080921A (en) 2021-05-27

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