• 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 (4) for an internal combustion engine with liquid cooling with at least two outlet valves for controlling outlet openings (14) and at least one inlet valve for controlling at least one inlet opening (15) per cylinder (2), with at least one coolant jacket through which coolant flows. 3), wherein an outlet valve bridge (7) is arranged between two adjacent exhaust valves and an inlet / outlet valve bridge (8) is arranged between at least one exhaust valve and an adjacent inlet valve, and wherein in the area of at least one exhaust valve bridge (7) a first cooling channel (18) , and in the region of at least one inlet / outlet valve bridge (8) a second cooling channel (19) is arranged, and the first and second cooling channels (18, 19) in a central cooling region (20) of the cylinder (2) are flow-connected to each other. In order to improve the cooling in the region of the inlet / outlet valve bridges as well as in the area of the outlet valve guides, it is provided that at least one second cooling channel (19) has a flow dividing device (21), which divides the second cooling channel (19) into a first partial channel (19a). and a second sub-channel (19b), wherein preferably the first sub-channel (19a) in the region of an exhaust valve guide (14a) and the second sub-channel (19b) in the region of an exhaust valve seat (14b) of the adjacent exhaust valve are arranged.
    公开号:AT517127A1
    申请号:T50376/2015
    申请日:2015-05-07
    公开日:2016-11-15
    发明作者:Christof Dipl Ing Knollmayr
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a cylinder head for an internal combustion engine with liquid cooling with at least two exhaust valves for controlling exhaust ports and at least one inlet valve for controlling at least one inlet port per cylinder, with at least one cooling jacket through which coolant flows, an exhaust valve bridge between two adjacent exhaust valves and between at least one exhaust valve an inlet / outlet valve bridge is arranged in each case adjacent to an adjacent inlet valve, and a first cooling channel is arranged in the region of at least one outlet valve bridge, and a second cooling channel is arranged in the region of at least one inlet / outlet valve bridge, and the first and second cooling channels are arranged in a central cooling region of the Cylinders are fluidly connected to each other.
    AT 506 473 B1 describes a cylinder head for a multi-cylinder internal combustion engine having a coolant jacket comprising the exhaust valves and having a coolant collecting passage extending longitudinally of the cylinder head on the exhaust side. Cooling channels are located in the area of the exhaust valve bridge and in the area of the inlet / outlet valve bridges. Since the coolant flow into the area of the cooling passage of the intake / exhaust valve bridge occurs on both sides of each exhaust valve, flow stagnation and thus overheating in the area of the intake / exhaust valve bridges and the exhaust valve guides may occur.
    Internal combustion engines with exhaust manifolds formed integrally with the cylinder heads are known from the publications US 2005/0087154 A1, EP 0 856 650 A1, US Pat. No. 7,051,685 B2, AT 500 442 B1.
    In particular, in high-performance internal combustion engines, sufficient cooling of the region of the inlet / outlet valve bridges and the outlet valve guides is not guaranteed.
    The object of the invention is to improve the cooling in the region of the inlet / outlet valve bridges as well as in the region of the outlet valve guides.
    According to the invention, this takes place in that at least one second cooling channel has a flow dividing device which subdivides the second cooling channel at least in sections into a first sub-channel and a second sub-channel.
    Preferably, the first sub-channel in the region of an exhaust valve guide and the second sub-channel in the region of an exhaust valve seat of the adjacent exhaust valve are arranged. This makes it possible to improve the cooling both in the area of the exhaust valve guide, as well as in the region of the exhaust valve seat.
    Preferably, the first subchannel and the second subchannel are merged both upstream and downstream of the flow divider. In detail, it can be provided that the first and second sub-channels are brought together in the region of the first cooling channel. Furthermore, the first and the second sub-channel can be merged in the region of a connecting channel of the cooling jacket, which is arranged in the region of a motor transverse plane between two adjacent cylinders or on at least one end side of the cylinder head. The connecting channel connects two outlet-side and / or two inlet-side cooling jacket sections of two adjacent cylinders and / or at least one outlet-side cooling jacket section to an inlet-side cooling jacket section.
    The flow division of the second cooling channel thus takes place substantially only in the region of the inlet / outlet valve bridge. The coolant flow in the region of the inlet / outlet valve bridge is thus subdivided into two partial flows, wherein the first partial flow flows around the outlet valves through the first partial passage and thus cools the corresponding outlet valve seat. The second partial flow of the second sub-channel cools the transition region between intake and exhaust valves. The two sub-channels allow a directed flow and a pinpoint cooling of thermally highly stressed areas of the inlet / outlet valve bridge and in particular the adjacent exhaust valve seat.
    In addition or as an alternative to the flow dividing device, it can be provided according to the invention that the first cooling channel is flow-connected to the second cooling channel only via the central cooling region, and at least one flow interruption device is arranged at least in a region diametrically opposite the first and / or second cooling channel relative to the outlet valve center. Under flow interruption is understood to mean both a complete interruption of the cooling channel, for example by material input or a lid device, as well as a throttling point or device interrupting the flow. It is particularly advantageous if the first cooling channel and at least one second cooling channel-preferably the first cooling channel and the first sub-channel-at least one outlet valve guide surround over an angular range between 180 ° and 300 °, preferably about 210 ° to 240 °. The second cooling channel is thus exempted from the first cooling channel by the flow interruption device in an area facing the outlet longitudinal side wall of the cylinder head. Thus, a complete flow around the exhaust valves is prevented. This can prevent that there is a bypass flow between the first and second cooling channel of the coolant in the region of the outside of the cylinder and thus stagnation and / or overheating in the region of the second cooling channel. Due to the higher flow rates, on the one hand, increased heat removal from the region of the outlet valve guides and, on the other hand, improved cooling of the outlet valve seats can be achieved.
    The cylinder head may have an integrated coolant collecting channel extending over at least two cylinders and / or at least one integrated exhaust gas collector extending over at least two cylinders, which is at least partially surrounded by an exhaust gas cooling jacket. The first cooling channel of each cylinder can be connected to the coolant collection channel and / or to the exhaust gas cooling jacket via at least one transfer channel. The main flow from or to the coolant collection or coolant distributor channel or from or to the exhaust gas cooling jacket of the exhaust manifold takes place via the transfer channel connected to the first cooling channel.
    The coolant can flow conventionally via flow passages in the region of the cylinder head plane from the cooling jacket of the cylinder block in the cooling jacket of the cylinder head or - as usual in so-called top-down cooling systems - flow from the cooling jacket of the cylinder head into the cooling jacket of the cylinder block.
    The production cost can be kept extremely small if the flow divider and / or the flow interruption device is formed by a cast wall portion of the cylinder head. The flow dividing device and the flow interrupting device are thus formed by the casting material of the cylinder head itself, with only minor modifications of the casting mold or the casting cores are required.
    The flow dividing device and / or the flow interruption device can be used to substantially improve the heat removal from thermally highly stressed areas of the valve bridges, in particular the inlet / outlet valve bridges, as well as the outlet valve guides, especially in high-performance internal combustion engines.
    The invention is explained in more detail below with reference to the non-limiting figures.
    Show in it
    1 shows a cooling jacket system of a cylinder head according to the invention having an internal combustion engine in an oblique view,
    2 shows a cooling jacket of a cylinder head according to the invention in a plan view,
    3 shows the cooling jacket in a bottom view,
    4 shows the cooling jacket in a section along the line IV - IV in Fig. 2,
    5 shows a cylinder head according to the invention in a section along the line V - V in Fig. 2,
    6 shows the cooling jacket of a cylinder of the cylinder head according to the invention in an oblique view from above,
    Fig. 7 shows the detail VII of Fig. 8 and
    Fig. 8 shows the cooling jacket of a cylinder in an oblique view from below.
    1 shows a cooling jacket system 1 of an internal combustion engine with a plurality of cylinders 2, which has a cooling jacket 3 of a cylinder head 4 for cooling of thermally critical areas such as fire deck 5, valve guides 14a, 14b, valve seats 14b, 15b, exhaust valve bridges 7 between the exhaust valves, inlet / Exhaust valve bridges 8 between intake valves and exhaust valves, exhaust ports 9, etc. (Fig. 5). The cooling jacket 3 of the cylinder head 4 is in fluid communication with a block cooling jacket 10 of a cylinder block, not shown. In the area of the cylinder head sealing plane 11, there are per cylinder 2 outlet and / or inlet-side flow passage openings 12, 13 between the cooling jacket 3 of the cylinder head 4 and the block cooling jacket 10, as shown in FIG. The cylinder head 4 has two exhaust valves per cylinder 2 and two inlet valves, of which only the exemptions 14 in the cooling jacket 3 for the outlet openings or the exemptions 15 in the cooling jacket 3 for the inlet openings and - in Fig. 5 - the exhaust valve guides 14a and inlet valve guides 15a and exhaust valve seats 14b and intake valve seat 15b are shown. The exhaust valve guides 14a are also shown in FIGS. 6 to 8.
    The cylinder head 4 has an integrated exhaust gas collector 16 (see FIG. 5), which is at least partially surrounded by an exhaust gas cooling jacket 17. The exhaust gas cooling jacket 17 is in fluid communication with the cooling jacket 3 of the cylinder head 4 via one transfer passage 6 per cylinder 2, wherein the transfer passage 6 per cylinder 2 is connected to a first cooling passage 18 arranged in the region of the exhaust valve bridge 7 between two exhaust valve openings 14. In the region of each of the inlet / outlet valve bridge 8 between an outlet valve and an inlet valve, in each case a second cooling channel 19 is arranged, which is connected to the first cooling channel 18 in a central, ie near-cylinder cooling region 20.
    The cooling jacket 3 of the cylinder head 4 has an outlet-side cooling jacket section 3a and an inlet-side cooling jacket section 3b, which are fluidly connected to one another in the region of engine transverse planes 23 between adjacent cylinders 2 and on the end faces 4a, 4b of the cylinder head 4 via connecting channels 22. Engine transverse plane 23 here denotes a plane extending perpendicularly to the engine longitudinal plane 2b between adjacent cylinders 2 through cylinder axes 2a.
    The second cooling channel 19 is designed to be divided in the region of each inlet / outlet valve bridge 8, wherein a first partial channel 19 a and a second partial channel 19 b are arranged on each side of a flow dividing device 21. The in a plan view of the direction indicated by reference numeral 2a cylinder axis, for example, sickle-shaped or kidney-shaped flow divider 21 thus divides the second cooling channel 19 into two sub-channels - in a in Fig.5 above the outlet channel 9 drawn first sub-channel 19a and obliquely in the figures The second partial channel 19b, which is arranged below the first partial channel 19a, projects from the common flow path upstream of the flow dividing device 21 and opens again downstream into a common flow path downstream of the flow dividing device 21. The first part of the channel 19a is arranged in the form of a circular sector partially around the foreign valve guide 14a, whereby an optimal cooling of the exhaust valve guide is achieved. The second sub-channel 19b is arranged in the region of the outlet valve seat 14b specifically removes heat from this region of the inlet / outlet valve bridge 8. The first and second sub-channels 19a, 19b are each brought together in the region of the first cooling channel 18 on the one hand and in the region of the adjacent connecting channel 22 of the cooling jacket 3 on the other hand. Each communication passage 22 is configured to fluidly connect two exhaust-side cooling jacket portions 3a and / or two intake-side coolant portions 3b of two adjacent cylinders 2 and / or at least one exhaust-side cooling jacket portion 3a to an inlet-side cooling jacket portion 3b.
    Depending on whether a top-down cooling concept - with flow from the cooling jacket 3 of the cylinder head 2 in the block cooling jacket 10 - or a conventional cooling concept with flow from the block cooling jacket 10 in the cooling jacket 3 of the cylinder head 2 is converted, the flow from the first cooling channel 18th into the second cooling channel 19 or from the second cooling channel 19 into the first cooling channel 18. In this case, the flow takes place at least in the regions of the engine transverse planes 23 substantially transversely to the engine longitudinal plane 2b spanned by the cylinder axes 2a.
    In order to avoid stagnation of the flow in the second cooling channel 19, the first cooling channel 18 is flow-connected to the second cooling channel 19 only via the central cooling region 20, wherein in relation to the outlet opening 14 of the first 18 and / or second cooling channel 19 diametrically opposite region of Cylinder head 2, a flow interruption device 24 is arranged (see Fig. 6 to 8). In this case, the flow interruption device 24 is, for example, a blockage or interruption of a region of the second cooling channel 19 surrounding the outlet valves, or a connection of the first 18 to the second cooling channel 19. Instead of an interruption or blockage, a throttle point or other types of flow interruptions may also be provided. The first cooling channel 18 and at least one second cooling channel 19-preferably the first cooling channel 18 and the first sub-channel 19a-combined together surround the corresponding outlet valve guide 14a over an angular range β between 180 ° and 300 °, preferably about 210 ° to 240 °.
    By the flow interruption device 24 bypass flows between the first 18 and second cooling channel 19 can be avoided by the exhaust valve on the side facing away from the first cooling passage 18 side of the exhaust valve guide 14a. Thus, in the region of each second cooling channel 19, a defined radial flow in the engine longitudinal direction occurs at high speeds and throughputs locally.
    Both with the flow divider 21 and with the flow interruption device 24, the cooling in the region of the corresponding inlet / outlet valve bridge 8 can be improved. A particularly good heat dissipation can be achieved by combining the flow divider 21 and the flow interruption device 24.
    权利要求:
    Claims (12)
    [1]
    Cylinder head (4) for an internal combustion engine with liquid cooling with at least two exhaust valves for controlling exhaust ports (14) and at least one inlet valve for controlling at least one inlet port (15) per cylinder (2), with at least one coolant jacket (3) through which coolant flows. wherein between two adjacent exhaust valves, an exhaust valve bridge (7) and between at least one exhaust valve and an adjacent intake valve each an inlet / Auslaßventilbrücke (8) is arranged, and wherein in the region of at least one exhaust valve bridge (7), a first cooling channel (18), and a second cooling channel (19) is arranged in the region of at least one inlet / outlet valve bridge (8), and the first and second cooling channels (18, 19) are connected to each other in a central cooling region (20) of the cylinder (2), characterized in that at least one second cooling channel (19) has a flow dividing device (21) which subdivides the second cooling channel (19) at least in sections into a first sub-channel (19a) and a second sub-channel (19b), preferably the first sub-channel (19a) in the region of an outlet valve guide (14a) and the second sub-channel (19b) in the region an exhaust valve seat (14b) of the adjacent exhaust valve are arranged.
    [2]
    2. Cylinder head (4) according to claim 1, characterized in that the first cooling channel (18) with the second cooling channel (19) only via the central cooling region (20) is flow-connected, and at least one with respect to the outlet opening (14) the first and / or second cooling channel (18, 19) diametrically opposite region at least one flow interruption device (24) is arranged.
    [3]
    3. Cylinder head (4) for an internal combustion engine with liquid cooling with at least two outlet valves for controlling outlet openings (14) and at least one inlet valve for controlling at least one inlet opening (15) per cylinder (2), with at least one coolant jacket (3) through which coolant flows. wherein between two adjacent exhaust valves, an exhaust valve bridge (7) and between at least one exhaust valve and an adjacent intake valve each an inlet / Auslaßventilbrücke (8) is arranged, and wherein in the region of at least one exhaust valve bridge (7), a first cooling channel (18), and a second cooling channel (19) is arranged in the region of at least one inlet / outlet valve bridge (8), and the first and second cooling channels (18, 19) are connected to each other in a central cooling region (20) of the cylinder (2), characterized that the first cooling channel (18) with the second cooling channel (19) only via the central Küh Is at least in a relative to the outlet opening (14) the first and / or second cooling channel (18, 19) diametrically opposite region at least one flow interruption device (24) is arranged.
    [4]
    4. Cylinder head (4) according to claim 3, characterized in that at least one second cooling channel (19) has a flow dividing device (21) which divides the second cooling channel (19) into a first sub-channel (19a) and a second sub-channel (19b) , wherein preferably the first part-channel (19a) in the region of an outlet valve guide (14a) and the second part-channel (19b) are arranged in the region of an outlet valve seat (14b) of the adjacent outlet valve.
    [5]
    5. Cylinder head (4) according to any one of claims 1, 2 or 4, characterized in that the first and second sub-channel (19a, 19b) both upstream and downstream of the flow divider (21) are merged.
    [6]
    6. Cylinder head (4) according to any one of claims 1, 2, 4 or 5, characterized in that the first sub-channel (19a) and the second sub-channel (19b) in the region of the first cooling channel (18) are brought together.
    [7]
    7. Cylinder head (4) according to one of claims 1, 2, 4 to 6, characterized in that the first sub-channel (18) and the second sub-channel (19) in the region of a connecting channel (22) of the cooling jacket (3) are merged, which is arranged in the region of a motor transverse plane (23) between two adjacent cylinders (2) and / or in the region of at least one end face (4a, 4b) of the cylinder head (4).
    [8]
    8. Cylinder head (4) according to claim 7, characterized in that the connecting channel (22) has two outlet-side cooling jacket sections (3a) and / or two inlet-side cooling jacket sections (3b) of the cooling jacket (3) of two adjacent cylinders (2) fluidly connected to each other.
    [9]
    9. Cylinder head (4) according to claim 7 or 8, characterized in that the connecting channel (22) at least one outlet-side cooling jacket portion (3a) of the cooling jacket (3) with an inlet-side cooling jacket portion (3b) fluidly connected to each other.
    [10]
    10. Cylinder head (4) according to one of claims 1, 2, 4 to 9, with at least two cylinders (2) extending integrated coolant collection channel and / or at least one at least two cylinders (2) extending integrated exhaust manifold (16). which is at least partially surrounded by an exhaust gas cooling jacket (17), characterized in that the first cooling channel (18) of each cylinder (2) with the coolant collecting channel and / or with the exhaust gas cooling jacket (17) preferably via at least one passage channel (6), connected is.
    [11]
    Cylinder head (4) according to one of claims 1, 2, 4 to 10, characterized in that at least one first cooling channel (18) and a second second cooling channel (19) arranged thereafter - preferably the first part channel (19a) of the second cooling channel (19 ) - together at least one outlet valve guide (14a) over an angular range (ß) between 180 ° and 300 °, preferably about 210 ° to 240 ° surrounded.
    [12]
    12. Cylinder head (4) according to one of claims 1 to 11, characterized in that the flow dividing device (21) and / or the flow interruption device (24) by a cast wall portion of the cylinder head (4) is formed.
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    引用文献:
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    法律状态:
    2022-01-15| MM01| Lapse because of not paying annual fees|Effective date: 20210507 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50376/2015A|AT517127B1|2015-05-07|2015-05-07|CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE|ATA50376/2015A| AT517127B1|2015-05-07|2015-05-07|CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE|
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    PCT/AT2016/050127| WO2016176710A1|2015-05-07|2016-05-04|Cylinder head for an internal combustion engine|
    CN201680026380.3A| CN107667214B|2015-05-07|2016-05-04|Cylinder cover for internal combustion engine|
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