• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Valve seat ring (10) for a gas exchange valve of a cylinder of an internal combustion engine, wherein a valve body of the gas exchange valve for closing the gas exchange valve to the valve seat ring to the plant can be brought, and wherein the valve body for opening the gas exchange valve of the valve seat ring is removable. The valve seat ring (10) consists of different materials, namely in first sections (13) of a first material and in second sections (14) of a second material, wherein the first material compared to the second material has a higher strength, and wherein the second material has a higher thermal conductivity compared to the first material.
    公开号:CH713420A2
    申请号:CH00058/18
    申请日:2018-01-18
    公开日:2018-08-15
    发明作者:Eschey Christian
    申请人:Man Diesel & Turbo Se；
    IPC主号:
    专利说明:

    Description: [0001] The invention relates to a valve seat ring of a gas exchange valve of an internal combustion engine. Furthermore, the invention relates to a gas exchange valve for an internal combustion engine and to a method for producing the valve seat ring.
    From the prior art known internal combustion engines have gas exchange valves, namely on the inlet side gas exchange valves, via which cylinders the engine charge air can be supplied, as well as on outlet side shuttle valves, which can be removed from the cylinders of the engine exhaust.
    Each gas exchange valve of an internal combustion engine has a valve body, wherein with the valve body, a valve seat ring cooperates. When the gas exchange valve is closed, the valve body lies or sits with a defined area on a defined surface area of the valve seat ring, whereas with the gas exchange valve open, this area of the valve body does not rest on the valve seat ring but is removed or lifted away from the valve seat ring.
    Valve seat rings of gas exchange valves which are known from practice are made of one and the same material throughout and are partly provided with wear protection (for example armor). As a result of increasingly higher pressures and temperatures in the combustion chambers of cylinders, the demands placed on the valve seat rings of gas exchange valves, in particular with regard to strength, thermal conductivity and wear resistance, are increasing. With known from practice valve seat rings these requirements can be met only insufficient.
    On this basis, the present invention seeks to provide a novel valve seat ring of a gas exchange valve, a gas exchange valve with such a valve seat ring and a method for producing the valve seat ring.
    This object is achieved by a valve seat ring according to claim 1. According to the invention, the valve seat ring consists of different materials, namely in first sections of a first material and in second sections of a second material, wherein the first material compared to the second material has a higher strength, and wherein the second material in comparison to the first material a has higher thermal conductivity. Accordingly, the invention proposes a valve seat ring which is not made of one and the same material throughout, but rather has portions of different materials in the sense of a composite structure. The first sections of the first material take over the main function of the static and dynamic strength of the valve seat ring. The second sections of the second material take over the function of a high heat dissipation from the valve seat ring. Alternatively, the two materials support the respective main function of the other material. The use of the different materials has the advantage that the materials can be individually tailored to their main function can be selected and not a single material must meet the requirements for high strength and good thermal conductivity simultaneously.
    Preferably, the valve seat ring is formed in a third portion of a third material, wherein the third material has a higher ductility compared to the first and second material. With the third material in the third region of the valve seat ring in particular the closing behavior of the gas exchange valve can be positively influenced. The high ductility in the third section ensures that a sealing effect between valve seat ring and valve body of the gas exchange valve is achieved within a few hours of operation and thus reduce operating fluctuations.
    According to an advantageous embodiment of the valve seat ring is formed in several parts, wherein a first part, which cooperates with the valve body and is cooled, which consists of the different materials sections, and wherein a second part, which is the assembly of the valve seat ring in the internal combustion engine serves, consists of a continuous material, the two parts are firmly connected. This is advantageous for economical production of the valve seat ring. Only in terms of strength and thermal conductivity and sealing effect critical areas of the valve seat ring are made of sections of different materials. The part of the valve seat ring, which serves to assemble the same in the internal combustion engine, can be manufactured in the conventional manner from one and the same material.
    The inventive gas exchange valve is in claim 11. The inventive method for producing the valve seat ring is defined in claim 12 or 13.
    Preferred embodiments of the invention will become apparent from the dependent claims and the description below. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:
    Fig. 1 shows a detail of an inventive internal combustion engine in the region of an inventive valve seat ring of the gas exchange valve.
    The invention relates to a valve seat ring for a gas exchange valve of an internal combustion engine, a gas exchange valve with such a valve seat ring and a method for producing the valve seat ring.
    Fig. 1 shows a highly schematic of a section of a valve seat ring 10 for a gas exchange valve of a cylinder of an internal combustion engine. The gas exchange valve may be an inlet-side gas exchange valve for charge air or also an exhaust-side gas exchange valve for exhaust gas.
    The valve seat ring 10 shown in Fig. 1 cooperates with a valve body, not shown, wherein the valve body is also referred to as a valve cone or valve disc. To close the gas exchange valve, the valve body can be brought into contact with the valve seat ring 10, wherein brought into contact portions or surface areas of the valve body and valve seat ring 10 provide the sealing effect. To open the gas exchange valve, the valve body is removable from the valve seat ring 10, in particular liftable.
    The valve seat ring 10 shown in Fig. 1 has two parts 11,12 which are fixedly connected to each other, in Fig. 1 via a weld seam 18. The first part 11 of the valve seat ring 10 is that part which with the Valve body cooperates and must be designed according to strength, thermal conductivity and sealing effect. The second part 12 of the valve seat ring 10 serves to mount the valve seat ring 10 in a cylinder head of the internal combustion engine.
    The second part 12 of the valve seat ring 10, which is the assembly of the valve seat ring 10 in the internal combustion engine, in particular in the cylinder head of the internal combustion engine, is made continuously from one and the same material, said second part 12 in particular match exciting manufacturing process, such as Example milling or turning, can be made.
    The first part 11 of the valve seat ring 10 of FIG. 1, which cooperates with the valve body is made of different materials.
    Thus, the part 11 of the valve seat ring 10 has first portions 13 of a first material and second portions 14 of a second material, wherein the first material of the first portions 13 compared to the second material of the second portions 14 has a higher strength, and wherein the second material of the second portions 14 compared to the first material of the first portions 13 has a higher thermal conductivity.
    The first portions 13 made of the first material primarily provide sufficient static and dynamic strength of the valve seat ring 10. The second sections 14 made of the second material primarily provide a correspondingly high thermal conductivity in order to enable a high heat dissipation of surfaces of the valve seat ring 10 to be tempered. Both sections of the different materials additionally assume the function of the respective other area from the other material.
    The sections 13 and 14 of the different materials form a composite structure. Each of the materials of the two sections 13 and 14 can be selected or designed separately for the respective main function. The first material is preferably a first metallic material. Likewise, the second material is preferably a second metallic material.
    Preferably, the strength of the first material of the first sections 13 is between 740 N / m2 and 1200 N / m2. The following material is preferably used as the first material for the first sections 13: Stellite 12.
    The thermal conductivity of the second material of the second sections 14 is preferably between 250 W / mK and 400 W / mK. The second material used for the second sections 14 is preferably the following material: copper.
    The first portions 13 formed of the first high-strength material preferably form a three-dimensional structure, the second portions 14 of the second material having the relatively high thermal conductivity being formed by the cavities or spaces of the three-dimensional structure having second material are filled. The three-dimensional structure may be a regular structure, in particular a honeycomb structure or truss structure, or else an irregular structure, in particular a foam structure.
    It is therefore within the meaning of the invention that the valve seat ring 10, at least in the region of the part 11, which cooperates with a valve body, portions 13, 14 of different materials, namely the first portions 13 of the first material to provide the main function the static and dynamic strength of the valve seat ring 10 and the second sections 14 of the second material to provide a high heat dissipation of heated sections, such as surface areas of the valve seat ring 10. Fig. 1 shows in the region of the part 11 of the valve seat 10, a cooling device in the sense a cooling tube or cooling channel, which is flowed through by coolant, wherein a good heat dissipation in the direction of the cooling device 17 is ensured by the second portions 14 of the second material.
    In the shown in Fig. 1, preferred embodiment of the inventive valve seat ring 10, the same has a third portion 15 which defines a surface region 16 of the valve seat 10, on which can be brought to the closing of the gas exchange valve of the valve body to the plant. In this third section 15, which forms the contact area for the valve body, the valve seat ring 10 is preferably made of a third material, wherein the third material has a high or higher ductility compared to the first material and compared to the second material.
    Preferably, as the third material of the following metallic or ceramic material use: nickel or zirconium oxide.
    By the third portion 15 of a metallic or ceramic material with high ductility, in particular the sealing effect between the valve seat ring 10 and valve body of the gas exchange valve can be improved, so that an excellent sealing effect is achieved within a few hours of operation and thus operating fluctuations can be reduced.
    The invention further relates to a gas exchange valve with such a valve seat ring 10, wherein the gas exchange valve further comprises a cooperating with the valve seat ring 10, valve body, not shown.
    Furthermore, the invention relates to a method for producing the inventive valve seat ring. The valve seat ring 10 shown in FIG. 1 is made by making the second part 12 via an exciting manufacturing process. To produce the first part 11 of the valve seat ring 10, a three-dimensional structure such as a cavity structure is preferably first constructed from the first material, so that first the first portions 13 are made of the first material in a first step for producing the part 11 of the valve seat ring 10. As already stated, the three-dimensional structure can be designed regularly, for example in the form of a honeycomb structure or irregularly, for example in the form of a foam structure. The three-dimensional structure can be manufactured, for example, via a generative manufacturing process, such as 3D printing. Following the production of the three-dimensional structure, cavities or spaces are filled with the second material, for example by infiltration, so as to provide the second portions 14 of the second material between the first portions 13 of the first material. After providing the two parts 11, 12, they are preferably joined together by welding.
    In contrast, it is also possible that the first part 11, which comprises at least the first portions 13 of the first material and the second portions 14 of the second material, is produced by the fact that both materials and thus both sections 13th , 14 of the part 11 of the valve seat ring 10 are constructed at the same time or quasi simultaneously by means of a generative manufacturing process, for example by means of a multi-material 3D printing process.
    Before connecting the two parts 11, 12 or even after connecting the two parts 11,12 can be formed on the part 11 of the valve seat ring 10, the third portion 15 of the third material, for example by means of a coating method. Alternatively, the third portion 15 of the first part 11 can also be produced via a generative manufacturing process.
    The second part 12 of the valve seat ring 10, which serves for the assembly of the valve seat ring 10 in the internal combustion engine, in particular in the cylinder head of the internal combustion engine, is preferably made continuously from one and the same material. Preferably, the second part 12 consists of the first material of the first portion 13 of the first part 11. This then ensures good connectability of the two parts 11,12 by e.g. Welding.
    Accordingly, the invention proposes a completely novel valve seat ring 10 for a gas exchange valve of an internal combustion engine. At least that part 11 of the valve seat ring 10, which is exposed to high mechanical loads and high thermal loads, consists of a composite structure of at least two different sections 13, 14, which are made of different materials, namely from the first sections 13 of the first material with a relatively high strength and the second portions 14 of the second material having a relatively high thermal conductivity.
    Particularly preferred is an embodiment in which the valve seat ring 10 is made of a third material with high ductility in a third section, which serves as Aufsetzbereich for a valve body.
    [0034] 10 valve seat ring 11 part 12 part 13 first section 14 second section 15 third section 16 surface 17 cooling device 18 Weld seam
    权利要求:
    Claims (13)
    [1]
    Valve seat ring (10) for a gas exchange valve of a cylinder of an internal combustion engine, wherein a valve body of the gas exchange valve for closing the gas exchange valve to the valve seat ring can be brought into abutment, and wherein the valve body for opening the gas exchange valve of the valve seat ring is removable, characterized in that the Valve seat ring (10) consists of different materials, namely in first portions (13) of a first material and in second portions (14) of a second material, wherein the first material compared to the second material has a higher strength, and wherein the second Material compared to the first material has a higher thermal conductivity.
    [2]
    2. Valve seat ring according to claim 1, characterized in that the first portions formed from the first material (13) form a three-dimensional structure, and that the second portions (14) are formed by filled with the second material cavities or free spaces of the structure.
    [3]
    3. valve seat ring according to claim 2, characterized in that the three-dimensional structure is a regular structure, in particular a honeycomb structure.
    [4]
    4. valve seat ring according to claim 2, characterized in that the three-dimensional structure is an irregular structure, in particular a foam structure.
    [5]
    5. valve seat ring according to one of claims 1 to 4, characterized in that the first material is a first metallic material.
    [6]
    6. valve seat ring according to one of claims 1 to 5, characterized in that the second material is a second metallic material.
    [7]
    7. valve seat ring according to one of claims 1 to 6, characterized in that the valve seat ring (10) in a third portion (15) is formed of a third material, wherein the third material has a higher ductility compared to the first and second material.
    [8]
    8. Valve seat ring according to claim 7, characterized in that the third section (15) defines a surface region (16) of the valve seat ring (10) on which the valve body for closing the gas exchange valve to the plant can be brought.
    [9]
    9. valve seat ring according to claim 7 or 8, characterized in that the third material is a third metallic or ceramic material.
    [10]
    10. valve seat ring according to one of claims 1 to 9, characterized in that the valve seat ring (10) is formed in several parts, wherein a first part (11) which cooperates with the valve body and is cooled, consisting of the different materials sections (13 , 14, 15), and wherein a second part (12), which is used for mounting the valve seat ring in the internal combustion engine, consists of a material throughout, wherein the two parts (11, 12) are firmly connected to one another.
    [11]
    11. Gas exchange valve of an internal combustion engine, with a valve body and with a valve seat ring (10) for the valve body, characterized in that the valve seat ring (10) is designed according to one of claims 1 to 10.
    [12]
    12. A method for producing the valve seat ring (10) according to any one of claims 1 to 10, characterized in that in a first step, the first portions (13) are made of the first material to form a three-dimensional structure, and that subsequently in a second Step under formation of the second sections (14) cavities or spaces of the three-dimensional structure are filled with the second material.
    [13]
    13. A method for producing the valve seat ring (10) according to any one of claims 1 to 10, characterized in that the first portions (13) made of the first material and the second portions (14) are made of the second material at the same time over a generative manufacturing process.
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    同族专利:
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    JP2018128019A|2018-08-16|
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    KR20180092858A|2018-08-20|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS56121810A|1980-03-01|1981-09-24|Riken Corp|Valve seat insert ring and its manufacturing|
    DE3528526A1|1985-08-08|1987-02-19|Kloeckner Humboldt Deutz Ag|Reciprocating-piston internal combustion engine|
    JPH07279627A|1994-04-07|1995-10-27|Yamaha Motor Co Ltd|Press-in type valve seat|
    DE10255447A1|2002-11-28|2004-06-24|Daimlerchrysler Ag|Valve seat and method for producing a valve seat|
    DE102004027084A1|2004-06-02|2005-12-29|Man B & W Diesel Ag|Cooled valve seat ring for a cylinder head of an I.C. engine comprises ring parts forming an annular flow channel which is integrated via inlet and outlet holes in one of the ring parts after pressing into the cylinder head|
    DE102011007140A1|2011-04-11|2012-10-11|Man Diesel & Turbo Se|Valve seat ring for a gas exchange valve of internal combustion engine, has a flow-through opening defining the base body, where valve seat is formed at section of base body in area of through-flow opening,|
    DE102012013226A1|2012-07-04|2014-01-09|Bleistahl-Produktions Gmbh & Co Kg|High heat conducting valve seat ring|
    KR102199856B1|2014-07-30|2021-01-11|두산인프라코어 주식회사|A valve seat|DE102019130852A1|2019-11-15|2021-05-20|Man Energy Solutions Se|Valve seat insert of a gas exchange valve and gas exchange valve|
    法律状态:
    2021-01-15| AZW| Rejection (application)|
    优先权:
    申请号 | 申请日 | 专利标题
    DE102017102544.8A|DE102017102544A1|2017-02-09|2017-02-09|Valve seat ring of a gas exchange valve, gas exchange valve and method of manufacturing the valve seat ring|
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