• 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:

    公开号:SU1830107A3
    申请号:SU914894496
    申请日:1991-02-22
    公开日:1993-07-23
    发明作者:Distelrat Vinfrid；Kenig Rajnkhold
    申请人:Porsche Ag；
    IPC主号:
    专利说明:

    The invention relates to a method for fitting insert rings of valve seats in internal combustion engines in accordance with the preamble of paragraph 1 of the claims.
    The object of the invention is to provide a method for fitting insert rings of valve seats in internal combustion engines, which largely avoids these disadvantages, and thus provides an optimal shape of the combustion chamber.
    The method allows the fitting of the insert rings of the valve seats in internal combustion engines in such a way that the protrusion of the valve inside the combustion chamber is largely avoided. This optimum shape of the combustion chamber is achieved by first inserting a clearly oversized valve seat insert into the cylinder head bore.
    The sealing ring is then machined in such a way that a seating chamfer is formed that serves as a seating surface for the valve, as well as a protective chamfer on at least one side adjacent to this chamfer. The protective chamfer facing the combustion chamber is designed in such a way that a smooth transition is formed between it and the material of the cylinder head.
    This assembly method allows the position of the chamfers to be determined in such a way that the protrusion of the valve into the combustion chamber is mainly determined by the valve tolerance, the tolerance of the design height of the sealing ring is excluded.
    In a preferred and improved example of the method, a smooth transition is achieved due to the fact that the cylinder head material is also removed during the machining of the protective chamfer adjacent to the transition. Otherwise, it would be necessary to accurately account for the boundary surface between the cylinder head and the seal
    1830107 AZ with a solid ring, so that the protective chamfer on the side of the combustion chamber ends exactly at this boundary surface. In addition, T can thus be achieved with a continuously extending contour between the cylindrical wall that delimits the side of the combustion chamber and a smooth transition.
    The sealing ring fitted in accordance with the method leaves the upper part of the combustion chamber substantially free of edges, so that the risk of knocking ignition is clearly reduced. The lower edge of the valve ends almost flush with this upper part of the combustion chamber. The predicted position of this lower edge of the closed valve is within a narrowly limited valve tolerance band and thus oversizes the valve recesses in the piston, or clearly reduces the size of the valve recesses.
    Figure 1 shows a valve seat insert ring assembled according to a known method; Fig. 2 shows a valve seat insert ring assembled according to the method according to the invention; Figures 3-5 schematically show several steps in a known method; Figures 6-8 schematically show several steps in accordance with the method according to the invention.
    The known insert ring V of the valve seat in accordance with Fig. 3 is inserted into the bore 1 of the head 2 of the cylinder block. The structural height H of the O-ring V has a tolerance TH shown in dotted lines, i.e. the underside 4 of the sealing ring facing the combustion chamber 3 is somewhere within the TH tolerance. Therefore, the transition 5 between the cylinder head 2 and the sealing ring, adjacent to the upper part 6 of the combustion chamber, has a stage 7. In this embodiment, the position of the lower side 4 according to FIG. 4 is assumed for the known sealing ring V.
    The combustion chamber dimension B is defined between the sealing surface 8 and the transition 5 and has a TB tolerance.
    The dimension E of the press fit between the sealing surface 8 and the shoulder 9 of the bore 1 has been determined and has a GE tolerance, which is obtained by summing the tolerances TH and TB.
    After the sealing ring V has been pressed in in accordance with FIGS. 1 and 4, the inner surface 10 of the sealing ring V is machined in such a way that a bearing surface 12 for the valve 13 and a protective chamfer 14 are formed as a support chamfer.
    Adjacent to the abutment chamfer 11, another protective chamfer 16 can be located. FIG. 5 shows a finally assembled and machined O-ring V with a closed valve 13, the head height D of which is TD tolerated. The position of the valve surface 13 facing the combustion chamber 3 in relation to the transition 5 is the so-called protrusion U, i.e. by this amount the valve 13 protrudes into the combustion chamber 3. The amount of protrusion U is determined by summing the tolerances TH, TB and TD. Fig. 1 shows a prior art O-ring V after complete assembly according to Fig. 5.
    Similarly to FIGS. 3-5, FIGS. 6-8 schematically show several assembly steps in accordance with the method. In accordance with figure 6, the sealing ring S is pressed into the bore 1. which is clearly oversized relative to its structural height H. In this case, the position of the tolerance TH is selected in such a way that the lower side 4 in any case protrudes into the combustion chamber 3. Then the inner surface 10 is processed in such a way that the support chamfer 11 and the first protective chamfer 14 are formed. The sequence of this processing is any, it can be carried out by turning or by milling. In this case, the sealing ring S is machined in such a way that the protective chamfer 14 enters directly into the transition 5, so that there is no protruding underside 4. In this case, the tool for machining the sealing ring S is set in such a way that the bearing chamfer 11 is in a defined position relative to the sealing surface 8 and thus also relative to the transition 5. In this case, the protrusion U is mainly determined only by the tolerance TD of the valve 13. When machining the sealing ring S in in the transition zone 5, the material of the cylinder head 2 is removed. This avoids the expense that would be necessary to take into account the boundary surface 19 between the sealing ring S and the seat 1 so that the protective chamfer 14 ends exactly at the transition 5 in the boundary surface 19.
    In this case, the contour formed between the cylindrical wall 20 that delimits the combustion chamber 3 and the transition 5 is thus formed as continuous, so that no edges or projections are formed which contribute to detonation combustion.
    权利要求:
    Claims (3)
    [1]
    1. A method of fitting insert rings for valve seats in internal combustion engines, including machining the ring, fixing it in a bore located above the combustion chamber in the cylinder head, and machining the inner surface of the ring by turning or milling to form a bearing chamfer for the valve support surface, the first and second protective chamfers located on both sides of the support chamfer, while the height of the ring before machining exceeds the depth of the bore, characterized in that, in order to avoid detonation combustion of the fuel-air mixture, machining is carried out so that the first safety chamfer forms a smooth transition with the cylinder head.
    [2]
    2. The method according to claim 1, characterized in that when a smooth transition is formed in the area of the cylinder head immediately adjacent to said transition, material is removed.
    [3]
    3. A method according to claim 2, characterized in that when a smooth transition is formed, a continuous contour is formed between said transition and a cylindrical wall of the cylinder head, which laterally defines the combustion chamber.
    phi ^. 6
    Compiled by K. Agafonov Editor T. Shagova Techred M. Morgenthal Proofreader G. Kos
    Order 2491 Circulation Subscription
    VNIIPI of the State Committee for Inventions and Discoveries at the USSR State Committee for Science and Technology 113035. Moscow. Zh-35, Raushskaya nab., 4/5
    Production and Publishing Plant Patent, Uzhgorod, Gagarin Street. 101
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE4029881C2|1994-01-20|
    DE4029881A1|1992-04-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2704711C2|2014-09-11|2019-10-30|Ман Трак Унд Бас Аг|Valve for internal combustion engine|IT1196870B|1986-12-23|1988-11-25|Fiat Auto Spa|PROCEDURE FOR OBTAINING A VALVE SEAT|DE19533825C1|1995-09-13|1996-11-07|Daimler Benz Ag|Cylinder head for internal combustion engine|
    DE10007360B4|2000-02-18|2008-07-31|Volkswagen Ag|Method for producing a cylinder head for an internal combustion engine|
    DE102004058385B3|2004-12-03|2006-09-28|Alfing Montagetechnik Gmbh|Device for mounting components|
    DE102006055187B3|2006-11-23|2008-03-27|Lesa Maschinen Gmbh|Heat engine has cylinder with piston area and cylinder base, and cylinder base has valve opening with valve for inlet and outlet of drive medium|
    FR2909717A3|2006-12-12|2008-06-13|Renault Sas|Heat engine i.e. spark ignition engine, for motor vehicle, has annular element with upstream section, whose lower bearing forms step provoking rotational movement of admission gas along rotation axis of axis perpendicular to valve seat axis|
    FR2950932A1|2009-10-02|2011-04-08|Renault Sa|Internal combustion engine, has closing zone comprising one portion extending between valve passages, where portion has absolute roughness lower than absolute roughness of another portion of closing zone|
    FR3055030B1|2016-08-09|2020-04-24|Renault S.A.S|IMPROVED VALVE SEAT|
    CN109057907B|2018-09-30|2019-10-15|广西玉柴机器股份有限公司|A kind of valve retainer|
    DE102018218241A1|2018-10-24|2020-04-30|Mahle International Gmbh|Method for mounting a valve seat ring on a cylinder knock of an internal combustion engine|
    CN112963219A|2021-03-29|2021-06-15|安徽江淮汽车集团股份有限公司|Valve seat ring, gasoline engine and automobile|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE4029881A|DE4029881C2|1990-09-21|1990-09-21|Method for fitting valve seat rings in internal combustion engines|
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