• 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 an internal combustion engine (1) with a liquid-cooled cylinder block (2) for at least one cylinder (3), with at least one cylinder liner (4), wherein the cylinder (3) in an area adjacent to a fire deck (5) both inlet side, as well as on the outlet side of at least one between cylinder liner (4) and cylinder block (2) formed and substantially annular cooling jacket (8) is surrounded, wherein the cooling jacket (8) via at least one inlet opening (9) with an inlet channel (10) and over at least a drain port (12) is flow connected to a drain passage (13). In order to improve the type of cooling of the cylinder block (2) in the region of the fire deck (5), it is provided that the cooling jacket (8) in addition to the inlet channel (10) and outlet channel (13) via at least one connecting bore (15, 16) with the Inlet channel (10) and / or a coolant distribution channel (11) and / or a coolant collecting channel (14) is connected.
    公开号:AT516742A4
    申请号:T50662/2015
    申请日:2015-07-27
    公开日:2016-08-15
    发明作者:Robert Pöschl
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    The invention relates to an internal combustion engine having a liquid-cooled cylinder block for at least one cylinder, with at least one cylinder liner, wherein the cylinder is surrounded in a bordering on a fire deck area both inlet side and outlet side of at least one formed between the cylinder liner and cylinder block and substantially annular cooling jacket wherein the cooling jacket is flow connected via at least one inlet opening with a feed channel and via at least one drain opening with a flow channel.
    In the case of standard cooling systems in the cylinder block, the cooling jacket is usually pulled up as close as possible to the fire deck adjoining the cylinder head and flows through symmetrically, inlet and outlet channels being arranged diametrically with respect to the cylinder axis. Due to stress concentration in the cast connections of the main water supply of the inlet channel and the outlet channel, the casting passage can not be pulled up to the upper edge of the cylinder. In the exposed areas of the cooling jacket, therefore, stagnation points result with reduced cooling potential. This can lead to increased wear and damage as a result of asymmetric thermal loads during operation. For similar problems, so-called "liner top" cooling are known, where in addition to the main cooling jacket, which extends annularly around the cylinder liner, a supplied with separate supply and discharge ring segment is provided in the upper region of the cylinder, only via throttle points connection to the main cooling jacket has and thus ensures cooling of the upper, thermally highly stressed particular outlet valve side area. However, these solutions are very expensive to manufacture and also not very wear-resistant.
    A cooling system for the cylinder block of an internal combustion engine with a cooling jacket, which is formed between a wet, so directly on its outside of coolant flushed cylinder liner and the cylinder block, which is connected in the upper region of the cylinder with diametrical inlet and outlet channels for coolant is off US 5,251,578 A known. Furthermore, from the documents AT 380 928 B, AT 380 731 B and DE 18 18 466 Al cylinder blocks for internal combustion engines, in each case between a wet cylinder liner and the cylinder block, a cooling chamber is formed, which in its lower part with an inlet channel and in his upper area is connected to a drainage channel for coolant. Furthermore, from DE 2 539 478 A1, an engine block with a wet cylinder liner is known, wherein an annular cooling jacket is clamped between the cylinder liner and the cylinder block. Again, the cooling jacket is connected in its lower part with an inlet channel and in its upper part with a drain channel. In addition to the main cooling jacket, cooling water annular spaces are provided in the area of the bushing, which are connected via throttle points to the main cooling space and via additional outflow openings to a drainage line.
    The object of the invention is to improve the cooling of the cylinder block in the region of the fire deck, so the cylinder head facing surface in an internal combustion engine of the type mentioned.
    According to the invention this is achieved in that the cooling jacket is connected in addition to the inlet channel and outlet channel via at least one connecting bore with the coolant distribution channel and / or the coolant collecting channel. Conveniently, in this case, the inlet channel and the outlet channel in the axial direction, ie along the cylinder axis of the cylinder, substantially the same distance to the fire deck. The invention thus allows a local concentration of the flow in the highest thermally stressed areas. At the same time degassing in the range of inlet and / or outlet channel is possible.
    The cooling in the region of thermally critical regions of the cylinder block can be substantially improved if at least one connection bore is arranged in the outlet valve side region of the cooling jacket. Here, exhaust valve side means the area of the cooling jacket which is located on the sides of the exhaust valve (s) in plan view of the cylinder.
    In order to increase the flow and thus the heat dissipation, especially in the thermally critical areas of the cylinder block, it is advantageous if at least one connecting bore, preferably at least one outgoing from the coolant distributor channel first communication hole in the region of the cooling jacket with a through a junction point of the first communication hole in the Cooling sheath extending tangential plane of the cooling jacket includes an acute angle, wherein preferably the angle between 0 ° and 60 °. A tangential plane of the cooling jacket means an imaginary plane extending tangentially to the outside of the cooling jacket. The acute angle causes an asymmetrical flow directed towards the outlet valve side of the cooling chamber, whereby a high heat dissipation through the outlet valve side cooling space in the region of the sleeve collar of the cylinder liner is achieved.
    It can be provided that at least one first connection bore is oriented in the direction of the tangential flow of the coolant in the outlet-side cooling jacket. In other words, a first connection bore extends along or parallel or evenly to the direction of a connection between inlet and outlet opening, preferably the shortest connection between the inlet and outlet opening.
    Alternatively or additionally, it can be provided that at least one second connection bore is oriented counter to the direction of the tangential flow of the coolant in the outlet-valve-side cooling jacket. In other words, the second connection bore extends opposite to the direction of a connection between the inlet and outlet openings. The respective described connection or its direction is defined by the fact that the connection at the inlet opening takes its output and extends to the drain opening. Coolant is sucked out of the cooling jacket via the second connection bore, which results in a flow velocity which is high for heat removal in thermally critical areas of the fire deck. It is particularly advantageous if an orifice of at least one connecting bore in the cooling jacket, preferably at least one connected to the coolant collecting channel second connecting bore - viewed in a plan view of the cylinder - is arranged in an immediately adjacent to an outlet valve region of the outlet valve side cooling jacket.
    In an embodiment of the invention that is easy to manufacture, it is provided that at least one connecting bore, preferably the first connecting bore, is arranged running in or parallel to a normal plane on the cylinder axis. By adjusting the bore angle, it is particularly easy to compensate for the arrangement of a twisted valve pattern or different liner main connections.
    Alternatively, it may be provided that at least one connecting bore, preferably the first connecting bore, is arranged inclined to a normal plane on the cylinder axis. The connecting bore thus has an intersection with a normal plane to the cylinder axis. This oblique arrangement of the connection bore has the advantage that an additional vertical momentum of the flow in the inlet channel can be used. In the preparation of the oblique connection bore possibly existing openings can be used in the inlet channel for the guidance of the drilling tool. For a particularly good heat dissipation from the region of the bushing collar of the liner, it is advantageous if at least one connecting bore is arranged in a region bounded by the fire deck and a reference plane. The reference plane is defined as that normal plane to the cylinder axis, which touches the feed opening and / or drain opening on the fire deck side. The connecting bores are thus arranged in that region of the cylinder block, which is located between the fire deck and the inlet and outlet openings. As a result, strength-critical areas can be defused with the same cooling performance, since the opening of inlet and outlet do not have to be pulled into the area of the fire deck. At least one connection bore can be made from the outside of the cylinder block. On the outside of the cylinder block, the connecting hole can be closed by means of a sealing plug.
    Through the connection bore, a favorable flow pattern, in particular an asymmetric flow in favor of the exhaust valve in the cooling jacket can be achieved and thus the cooling of thermally highly stressed areas can be significantly improved. In addition, the connecting holes allow better degassing, since air can be removed very quickly through the connecting hole.
    The invention is explained in more detail below with reference to a non-limiting Ausführngsbeispiels, which is shown in the figures.
    Show in it
    1 shows an internal combustion engine in a first embodiment in sections according to the lines ΙΑ - ΙΑ, IB-IB and IC-IC in Fig. 2 or 3,
    2 shows this internal combustion engine in a section along the line II-II in Fig. 1, in a variant,
    3 shows this internal combustion engine in a section along the line II-II in Fig. 1, in another variant,
    4 shows an internal combustion engine in a first embodiment in sections along lines IVA-IVA, IVB-IVB and IVC-IVC in FIG. 5, FIG.
    5 shows this internal combustion engine in a section along the line V-V in Fig. 4,
    6 shows an internal combustion engine in a third embodiment in sections according to the lines VIA - VIA, VIB-VIB and VIC-VIC in Fig. 7 or 8,
    Fig. 7 shows this internal combustion engine in a section along the line VII-VII in Fig. 6, in a variant and
    Fig. 8 shows this internal combustion engine in a section along the line VII-VII in Fig. 6, in a further variant.
    FIGS. 1, 4 and 6 show, side-by-side, three sectional views of the same cylinder of the cylinder block, respectively, wherein in the left-hand illustrations IA, IVA, VIA the cylinder is cut according to the lines IA-IA, IVA-IVA and VIA-VIA, respectively , In the middle illustrations IB, IVB, VIB, the cylinder is cut in accordance with the lines IB-IB, IVB-IVB and VIB-VIB, respectively, and in the right-hand representations IC, IVC, VIC, the right cylinder is respectively in accordance with the lines IC-IC , IVC-IVC or VIC-VIC cut.
    Functionally identical parts are designated in the embodiments with the same reference numerals.
    In the figures, in each case an internal combustion engine 1 with a cylinder block 2 with a plurality of cylinders 3, which cylinders 3 are formed by wet cylinder liners 4. The cylinder block 2 borders on a fire deck 5 to a cylinder head, not shown, of which only the intake valves 6 and the exhaust valves 7 are indicated schematically. In the area of the bush collar 4b of the cylinder liner 4 bordering the fire deck 5, an annular cooling jacket 8 is formed between the cylinder liner 4 and the surrounding cylinder block 2. The cooling jacket 8 is connected via an inlet opening or an inlet area 9 to an inlet channel 10 arranged in the cylinder block 2, which starts from a coolant distributor channel 11.
    Furthermore, the cooling jacket 8 is connected via a drain opening 12 with a cylinder block 2 arranged in the flow channel 13, which leads to not shown cooling chambers of the cylinder head. The inlet and outlet openings 12, which are essentially equally spaced from the fire deck 5, and the inlet and outlet channels 13 are arranged diametrically with respect to the cylinder axis 3a in the transition between inlet and outlet valve-side regions of the cooling jacket. In the cylinder block 2, a coolant collecting channel 14 is arranged on the side of the drainage channels 13.
    In addition to the inlet openings 9 and drain openings 12, the cooling jacket 8 is connected to the coolant distribution channel 11 or the coolant collection channel 14 via at least one connection bore 15 or 16 opening into the cooling jacket 8 on the outlet valve side. The connecting bores 15, 16 should be arranged as close as possible to the fire deck 5 in order to achieve advantageous pressure conditions. As close as possible here means, for example, that they extend in the area between the fire deck 5 and a reference plane 17, wherein the reference plane 17 is defined as that normal plane on a cylinder longitudinal axis 3a, the fire deck side, the inlet opening 9 and / or drain opening 12 and their respective top side touched , The pressure loss via the inlet opening 9 and the drain opening 12 essentially defines the amount of coolant flowing through the additional connection bores 15, 16.
    Each connecting bore 15, 16 is arranged in the illustrated embodiment in the above-described region of the cylinder block 2, which is bounded by the fire deck 5 and a reference plane 17. The reference plane 17 is defined here as that normal plane 18 on the cylinder axis 3a, which preferably has a tangential plane on the fire deck side to the inlet opening 9 and / or
    Drain opening 12 and forms on the respective upper side. The connecting bores 15, 16 are thus preferably located above - ie on the side facing the firebox 5 - the inlet opening 9 and the outlet opening 12. Arrangements of the connecting bores 15, 16 at the same height as the inlet opening 9 and the drain opening 12 are also possible, but effects on the pressure conditions and the flow through the connecting bores 15, 16 must be taken into account here. The reinforcing effect is lower here.
    The bush collar 4b of the cylinder liner 4 has in the region of the cast connections of the inlet opening 9 and the drain opening 12 a reduced rigidity and is therefore made thicker, thus additional connecting holes 15, 16 do not adversely affect the stiffness.
    1 to 3 show a first embodiment of the invention, in which an outgoing from the inlet channel 10 first connecting hole 15 in the region of the cooling jacket 8 with a running through an opening point of the first connecting hole 15 in the cooling channel 8 tangential plane ε of the cooling jacket an acute angle α includes, wherein the angle α between 0 ° and 90 °, in particular between 0 ° and 60 °, may amount. In the exemplary embodiment, the angle α is about 30 °. The first connection bore 15 is - viewed in the direction of flow - oriented in the direction of the tangential flow S of the coolant in the outlet-side cooling jacket 8. In other words, the first connecting bore 15 extends along or parallel or gleichverlaufend to the direction of a connection between inlet 9 and drain opening 12. The coolant flows from the coolant distribution channel 11 and the inlet channel 10 through the first connecting hole 15 in the exhaust-valve-side cooling jacket. 8
    In the variant illustrated in FIG. 2, the first connection bore 15 is arranged in or parallel to a normal plane 18 on the cylinder axis 3a. In contrast, FIG. 3 shows another variant in which the first connecting bore 15 is arranged inclined to a normal plane 18 on the cylinder axis 3 a. Both in Fig. 2, and in Fig. 3, the first connection bore 15 can be drilled from the outside of the cylinder block 2 and then closed by a sealing plug not shown to the outside. The first version of the
    The invention has the advantage that the turbulence of the coolant in the region of the inlet opening 9 can be converted directly into heat transfer.
    4 and 5 show a second embodiment of the invention, in which a second connecting bore 16 connects the cooling jacket 8 with the coolant collecting channel 14. In this case, the coolant passes from the cooling jacket 8 into the coolant collecting channel 14 via the second connecting bore 16. The second connecting bore 16 is of relatively short design and slightly inclined relative to the flow direction S in the cooling jacket 8. In other words, the second connection bore 16 runs opposite to the direction of a connection between inlet 9 and outlet opening 12. The respectively described connection or its direction is thereby defined by the fact that the connection at the inlet opening 9 takes its exit and extends to the outlet opening 12. The second embodiment is used for additional heat dissipation through increased throughput.
    6 to 8 show a third embodiment of the invention, in which both a first connecting bore 15 between inlet channel 10 and cooling jacket 8, and a second connecting hole 16 between the cooling jacket 8 and the coolant collecting channel 14 is provided. In the variant illustrated in FIG. 7, the first connection bore 15 is arranged parallel to a normal plane 18 - analogous to FIG. 2. Fig. 8, however, branches a variant with - similar to Fig. 3 - inclined to the normal plane 18 executed first connecting bore 16. The third embodiment of the invention combines the advantages of the first and second embodiments, it can thus on the one hand increases the throughput and on the other hand, a larger Heat transfer can be effected.
    In the variants shown in FIGS. 3 and 8 with the connection bores 15 inclined with respect to normal planes 18 to the cylinder axes 3a, any existing openings in the inlet channel 10 may be used, through which the tool for producing the connection bore 15 can be guided , A subsequent closing of the connecting bore 15 on the outside of the cylinder block 2 by an additional sealing plug is not required. At the same time an additional vertical pulse of the flow in the inlet channel 10 can be used by the oblique design of the connecting hole 15 each.
    Through the first and / or second connecting bore 15, 16 in the upper region of the cylinder liner 4, a targeted asymmetric cooling of the regions with high thermal stress near the outlet valves 7 is possible. In addition, there is the advantage of better degassing. With the help of the connecting bores 15, 16 prevents air in the region of the inlet into the cooling jacket 8 accumulates. The connecting bores 15, 16 ensure a rapid further transported by possibly accumulating air. Through defined and targeted positioning and depending on the particular case selection of the number of connecting holes precise control of the asymmetric cooling can be achieved.
    权利要求:
    Claims (10)
    [1]
    1. internal combustion engine (1) with a liquid-cooled cylinder block (2) for at least one cylinder (3), with at least one cylinder liner (4), wherein the cylinder (3) in an adjacent to a fire deck (5) area both inlet side, as well the cooling jacket (8) via at least one inlet opening (9) with an inlet channel (10) and at least one drain opening (12) with a flow channel (13) is fluidly connected, characterized in that the cooling jacket (8) in addition to the inlet channel (10) and outlet channel (13) via at least one connecting bore (15, 16) with the inlet channel (10) and / or a coolant distribution channel (11) and / or a coolant collection channel (14) is connected.
    [2]
    Second internal combustion engine (2) according to claim 1, characterized in that at least one connecting bore (15, 16) in an outlet valve side region of the cooling jacket (8) is arranged.
    [3]
    3. Internal combustion engine (2) according to claim 1 or 2, characterized in that at least one connecting bore (15, 16), preferably at least one of the inlet channel (10) or the coolant distribution channel (11) outgoing first connecting bore (15), in the region of the cooling jacket (8) encloses an acute angle (a) with a tangential plane (ε) of the cooling jacket (8) passing through an opening point of the first connecting bore (15) into the cooling jacket (8), the angle (a) preferably being between 0 ° and 60 ° ° is.
    [4]
    4. internal combustion engine (2) according to one of claims 1 to 3, characterized in that at least one first connecting bore (15) in the direction of the tangential flow (S) of the coolant in the outlet-side cooling jacket (8) is oriented.
    [5]
    5. Internal combustion engine (1) according to one of claims 1 to 4, characterized in that at least one second connecting bore (16) opposite to the direction of the tangential flow (S) of the coolant in the outlet valve side cooling jacket (8) is oriented.
    [6]
    6. Internal combustion engine (1) according to one of claims 1 to 5, characterized in that a mouth of at least one connecting bore (15, 16) in the cooling jacket (8), preferably at least one with the coolant collecting channel (14) connected to the second connecting bore (16) viewed in a plan view of the cylinder (3) - is arranged in an immediately adjacent to an outlet valve (7) region of the outlet valve side cooling jacket (8).
    [7]
    7. Internal combustion engine (1) according to one of claims 1 to 6, characterized in that at least one connecting bore (15, 16), preferably a first connecting bore (15), in or parallel to a normal plane (18) on the cylinder axis (3a ) is arranged running.
    [8]
    8. Internal combustion engine (1) according to one of claims 1 to 7, characterized in that at least one connecting bore (15, 16), preferably the first connecting bore (15), inclined to a normal plane (18) on the cylinder axis (3a) is arranged ,
    [9]
    9. internal combustion engine (1) according to one of claims 1 to 8, characterized in that at least one connecting bore (15, 16) in a fire deck (5) and a reference plane (17) limited area is arranged, wherein the reference plane (17) is defined as that normal plane to the cylinder axis (3a), which preferably the fire deck side, the inlet opening (9) and / or drain opening (12) tangent.
    [10]
    10. Internal combustion engine (1) according to one of claims 1 to 9, characterized in that at least one connecting bore (15, 16) is made from the outside of the cylinder block (2), preferably in the region of the outside of the cylinder block (2) Closing plug is arranged. 2015 07 27 Fu / St
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    同族专利:
    公开号 | 公开日
    DE102016113039A1|2017-02-02|
    AT516742B1|2016-08-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2539478A1|1975-09-05|1977-03-10|Kloeckner Humboldt Deutz Ag|WATER COOLED PISTON INTERNAL ENGINE|
    AT380928B|1978-06-21|1986-07-25|Steyr Daimler Puch Ag|DEVICE FOR COOLANT GUIDANCE IN THE CYLINDER BLOCK LIQUID-COOLED INTERNAL COMBUSTION ENGINES|
    AT380731B|1983-06-30|1986-06-25|Steyr Daimler Puch Ag|DEVICE FOR COOLANT GUIDANCE IN THE CYLINDER BLOCK LIQUID-COOLED INTERNAL COMBUSTION ENGINES|
    US5251578A|1991-06-04|1993-10-12|Toyota Jidosha Kabushiki Kaisha|Cooling system for internal combustion engine|CN111894753A|2020-07-20|2020-11-06|东风商用车有限公司|Cooling device of forward flow type diesel engine|AT210605B|1959-07-08|1960-08-10|Automatofen Baugesellschaft Al|Device for regulating the secondary air supply in evaporative oil burners|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50662/2015A|AT516742B1|2015-07-27|2015-07-27|INTERNAL COMBUSTION ENGINE WITH A LIQUID COOLED CYLINDER BLOCK|ATA50662/2015A| AT516742B1|2015-07-27|2015-07-27|INTERNAL COMBUSTION ENGINE WITH A LIQUID COOLED CYLINDER BLOCK|
    DE102016113039.7A| DE102016113039A1|2015-07-27|2016-07-15|Internal combustion engine with a liquid-cooled cylinder block|
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