• 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:
    The invention relates to a cylinder head (1) for an internal combustion engine having at least one cylinder (11), with at least one valve seat ring (2) for a lifting valve, wherein the valve seat ring (2) is formed by an annular cooling channel (10) formed at least partially by the cylinder head (1). is surrounded, wherein the cooling channel (10) by an angular range (a) of at least 280 °, preferably at least 300 ° to the valve seat ring (2) between an inlet (3) and an outlet (4) for a coolant extends, and wherein inlet (3) and outlet (4) are arranged on the same side of the cylinder (11) and between the inlet (3) and the outlet (4), a separation region (6) is formed. In order to avoid locally high thermal stress areas between the inlet (3) and the outlet (4), it is provided that the separation region (6) a throttle point (7) for a defined short-circuit flow (S ') between inlet (3) and outlet (4).
    公开号:AT513262A4
    申请号:T50059/2013
    申请日:2013-01-29
    公开日:2014-03-15
    发明作者:Christof Dipl Ing Knollmayr；Mario Dipl Ing Fh Brunner
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    1 56543
    The invention relates to a cylinder head for an internal combustion engine with at least one cylinder, with at least one valve seat ring for a globe valve, wherein the valve seat ring is surrounded by an at least partially cylinder head molded annular cooling channel, wherein the cooling channel by an angular range of at least 280 °, preferably at least 300 °, extends around the valve seat ring between an inlet and an outlet for a coolant, and wherein inlet and outlet are arranged on the same side of the cylinder seat and between the inlet and the outlet, a separation region is formed.
    From WO 08/059108 A arranged in a cylinder head valve seat ring for a reciprocating internal combustion engine is known, wherein in the valve seat ring, a circumferential cooling channel is arranged, which extends between an inlet and an outlet for a coolant.
    The CH 272 380 B describes a valve device of an internal combustion engine with inserted valve seat ring for a poppet valve, wherein the valve seat ring is surrounded by a circumferential cooling channel which extends between an inlet and an outlet. Between the inlet and the outlet, a separating region for the coolant is formed, which prevents a short-circuit flow between inlet and outlet.
    The disadvantage is that the separation area between inlet and outlet forms an uncooled thermal bridge and this can lead to local overheating and thermal stresses, in particular when the separation area is positioned close to the thermally high at branched web between two outlet valves.
    The object of the invention is to avoid these disadvantages and to allow a more uniform cooling of the valve seat ring.
    According to the invention this is achieved in that the separation region has a throttle point for a defined short-circuit flow between inlet and outlet.
    The cross section of the throttle point can be between 1% and 10% of the maximum cross section of the cooling channel. Through the defined throttle point it comes
    Printed: 30-01-2013 E014 1 0 2013/50059 2 leakage flow between the inlet and the outlet in the separation area, which reliably prevents a local heat maximum at the valve circumference between the inlet and the outlet.
    It is preferably provided that the throttle point is formed by a defined Engestelle between the cylinder head and the valve seat ring.
    The inlet is in flow connection with cast or drilled inlet channels, the outlet with cast or drilled outlet channels of the Zyiinderkopfes.
    It can be provided that the inlet is connected to a pressure source in Zy'inderkopf and the outlet with a pressure sink in the cylinder block. Alternatively, it is also possible that the inlet is connected to a pressure source in the cylinder block and the outlet with a pressure sink in the cylinder head.
    In a particularly advantageous embodiment of the invention it is provided that the cooling channel of the valve seat ring is separated from the cooling system of the restlichten cylinder head. This makes it possible to use other pressures or cooling media for cooling the valve seat ring than, for example, for cooling the cylinder head. In particular, the entrance and exit can be connected to the lubricating oil system of the internal combustion engine.
    The invention will be explained in more detail below with reference to FIGS.
    Show it
    1 shows a cylinder head according to the invention in an oblique view,
    2 shows the cylinder head in a side view,
    3 shows the cylinder head in a section along the line III-III in Fig. 1, Figure 4 shows the cylinder head in a section along the line IV-IV in Fig. 3,
    Fig. 5 shows the cylinder head in a section along the line V-V in Fig. 3 and 3 3 10 2013/50059
    Iprinted: 30-01-2013
    6 shows the detail VI from FIG. 3.
    The figures show a Zyiinderkopf 1 for at least one cylinder 11 of an internal combustion engine, with at least one outlet valve formed by a lift valve (the axis 9 is indicated) with, at least per outlet valve, a valve seat ring 2 arranged in the cylinder head, for example, is pressed. The pressed into the cylinder head 1 oderein valve seat ring 2 is surrounded by a molded into the cylinder head 1, for example milled annular cooling channel 10 for a coolant, which is between an inlet 3 and an outlet 4 over an angle range α of at least 280 °, for example 300th ° to the valve seat ring 2 extends. The inlet 3 stands with an inlet channel 3a, the outlet 4 with an outlet channel 4a in connection, inlet channel 3a and outlet channel 4a are formed by from a side surface la of the cylinder head 1 outgoing parallel holes. Entrances and outlets 4 are thus - viewed in a plan view of the cylinder 11 - side by side on the same side 11a of the cylinder 11. The holes are subsequently closed in the region of the side wall la by plugs 3b, 4b. The entrances 3 are located in a region 5 adjacent to the web 5 between two valve seat rings, the outlets 4 in a the web 5 more distant area. The inlet channels 3a and outlet channels 4a are formed in the embodiment parallel to each other, this facilitates the production by drilling.
    This separation region 6 is formed in the exemplary embodiment by a wall accumulation in the cylinder head 1 and prevents the coolant flows on a direct and short path from the inlet 3 to the outlet 4, without the valve seat ring second to flow around. In conventional arrangements, the separation area is liquid-tight and virtually eliminates any leakage flow between inlet 3 and exit 4. However, this has the disadvantage of becoming a " hot spot " between entrance 3 and exit 4; can come, especially when the separation region 6 is disposed near the thermally highly stressed web 5 between two exhaust valves.
    In order to avoid selective overheating of the separation region 6, a throttle point 7 is provided in the separation region, wherein the cross section of the 4th
    Throttle 7 between 1% and 10% of the max. Cross-section of the annular cooling channel 10 is. Through the restrictor 7 there is a in Fig. 6 by the dashed arrow S 'hinted Leckargeströmung between the inlet 3 and the outlet 4, while the main flow S the valve seat ring 2 according to the spanned between the inlet 3 and outlet 4 angle range α of about 300th Flows around. The leakage flow causes sufficient cooling of the separation region 6.
    In the exemplary embodiment, the inlet 3 and the inlet channel 3a may be connected to a pressure source in the cylinder head 12 flanged to the cylinder head 1 and (indicated in FIG. 2) via a vertical bore 3c. The outlet 4 and the outlet channel 4 a is flow-connected via a vertical bore 4 c with the cooling jacket 8 of the cylinder head 1. The vertical bore 4c may be bored from the side of the cylinder head sealing surface 1b and closed by a plug 4b '.
    Alternatively, embodiments are also possible in which the inlet 3a is connected to a pressure source in the cylinder head 1 and the outlet 4 is connected to a pressure sink in the cylinder block 12. Furthermore, it is also possible to form the cooling circuit for the cooling channels 10 for cooling the valve seat rings 2 separately from the cooling circuit of the cylinder head 1. Thus, for cooling the cylinder head 1 and for cooling the valve seat rings 2 different cooling media, such as cooling water on the one hand and lubricating oil on the other hand, can be used.
    权利要求:
    Claims (10)
    [1]
    5 CLAIMS 1. Cylinder head (1) for an internal combustion engine with at least one cylinder, with at least one valve seat ring (2) for a lift valve, wherein the valve seat ring (2) by an at least partially cylinder head (1) molded annular cooling channel (10) is surrounded wherein the cooling channel (10) extends through an angular range (a) of at least 280 °, preferably at least 300 °, around the valve seat ring (2) between an inlet (3) and a discharge (4) for a coolant, and wherein inlet ( 3) and outlet (4) are arranged on the same side of the cylinder and between the inlet (3) and the outlet (4) a separating region (6) is formed, characterized in that the separating region (6) has a throttle point (7 ) for a defined short-circuit flow (S ') between inlet (3) and outlet (4).
    [2]
    2. Cylinder head (1) according to claim 1, characterized in that the cross section of the Drosselstellte (7) is between 1% and 10% of the maximum cross section of the cooling channel (10).
    [3]
    3. Cylinder head (1) according to claim 1 or 2, characterized in that the cooling channel (10) of the valve seat ring (2) from the cooling system of the remaining cylinder head (1) is separated.
    [4]
    4. Cylinder head (1) according to one of claims 1 to 3, characterized in that the inlet (3) and the outlet (4) is connected to a lubricating oil system.
    [5]
    5. Cylinder head (1) according to one of claims 1 to 4, characterized in that the inlet (3) or outlet (4) with in the cylinder head (1) molded, preferably drilled or cast inlet or outlet channels (3a, 4a ) connected is.
    [6]
    6. Cylinder head (1) according to one of claims 1 to 5, characterized in that the throttle point (7) by a defined Engestelle between the cylinder head (1) and the valve seat ring (2) is formed. 6
    [7]
    7. Cylinder head (1) according to one of claims 1 to 6, characterized in that the entrances (3) in a web (5) between two valve seat rings (2) adjacent area and the outlets (4) in a web (5) more distant area are arranged.
    [8]
    8. Cylinder head (1) according to one of claims 1 to 7, characterized in that the inlet (3) with a preferably drilled inlet channel (3a) and the outlet (4) with a preferably drilled outlet channel (4a) is in communication the inlet channel (3a) and the outlet channel (4a) per valve seat ring (2) are arranged parallel to one another, preferably spaced apart from one another.
    [9]
    9. Internal combustion engine with a cylinder head (1) according to one of claims 1 to 8, wherein the cylinder head (1) with a cylinder block (12) is connected, characterized in that the inlet (3) with a pressure source in the cylinder head (1) and the outlet (4) is connected to a pressure sink in the cylinder block (12).
    [10]
    10. Internal combustion engine with a cylinder head (1) according to one of claims 1 to 8, wherein the cylinder head (1) with a cylinder block (12) is connected, characterized in that the inlet (3) with a pressure source in the cylinder block and the outlet ( 4) is connected to a pressure sink in the cylinder head (1). 2013 01 29 Fu / Bt BS & smamamms
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    同族专利:
    公开号 | 公开日
    AT513262B1|2014-03-15|
    DE102014100841A1|2014-07-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CH272380A|1949-03-09|1950-12-15|Sulzer Ag|Valve device on internal combustion engines.|
    JPS5594422U|1978-12-25|1980-06-30|
    JPS5715918U|1980-06-30|1982-01-27|
    WO2008059108A1|2006-11-14|2008-05-22|Wärtsilä Finland Oy|Valve seat insert for a piston engine|
    DE102011009513A1|2010-01-26|2011-09-01|Société de Motorisations Aéronautiques|Cylinder head of an internal combustion engine with a cooling circuit|
    DE102014012807A1|2014-08-28|2016-03-03|Daimler Ag|Cylinder head for an internal combustion engine, in particular a motor vehicle|
    DE102016015289A1|2016-12-22|2018-06-28|Daimler Ag|Method for producing a cylinder head and cylinder head|
    EP3585990A4|2017-02-24|2020-12-09|Cummins Inc.|Engine cooling system including cooled exhaust seats|
    AT519991B1|2017-06-02|2019-07-15|Avl List Gmbh|Cylinder head with valve seat ring cooling|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50059/2013A|AT513262B1|2013-01-29|2013-01-29|Cylinder head for an internal combustion engine|ATA50059/2013A| AT513262B1|2013-01-29|2013-01-29|Cylinder head for an internal combustion engine|
    DE201410100841| DE102014100841A1|2013-01-29|2014-01-24|Cylinder head for internal combustion engine, has inlet and outlet that are separated using separating region that is provided with throttle point for defined short-circuit flow between inlet and outlet|
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