• 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:
    Cylinder head (2) comprising at least one prechamber (3), at least one spark plug (6) projecting into the prechamber (3), at least one prechamber gas valve (5) opening into the prechamber (3), the spark plug (6) and the Prechamber gas valve (5) in a common cavity (7) of the cylinder head (2) are arranged and an internal combustion engine with such a cylinder head (2).
    公开号:AT516619A4
    申请号:T50160/2015
    申请日:2015-02-27
    公开日:2016-07-15
    发明作者:Raphael Jacob
    申请人:Ge Jenbacher Gmbh & Co Og；
    IPC主号:
    专利说明:

    The present invention relates to a cylinder head having the features of the preamble of claim 1 and an internal combustion engine having such a cylinder head.
    Generic cylinder heads and internal combustion engines are already known from the prior art. From a certain bore (in about 150 mm) (gas) internal combustion engines are equipped with a prechamber for ignition amplification. An ignition source projecting into the pre-chamber ignites the mixture present there, which is relatively rich when the prechamber is purged, whereby ignition flares from the prechamber enter a main combustion chamber and ignite the mixture present there.
    There are various concepts for supplying fuel to prechambers. In non-purged prechambers, mixture is forced out of the main combustion chamber into the prechamber in the compression stroke.
    In the case of rinsed prechambers, it is also possible to supply the prechamber with additional fuel. This separate fuel supply in turn can be done via passive valves (check valves) or active valves.
    The packaging, ie the spatial placement of the components or supply lines in the cylinder head required for a purged prechamber concept, is demanding. To counter the space problems, there are approaches to make the Vorkammergasventile particularly small. This introduces lifetime issues because miniaturized prechamber gas valves are more susceptible to clogging or sticking of the movable parts.
    Another proposal for disposing the prechamber gas valve and spark plug sleeve is to position the prechamber gas valve at a distance relatively far from the prechamber, resulting in a long channel from the prechamber gas valve to the mouth thereof into the prechamber. This may be disadvantageous because it creates a large unsprayed volume, a so-called dead space, which contributes significantly to soot formation in the pre-chamber gas combustion.
    Object of the present invention is therefore to provide a cylinder head and an internal combustion engine, in which the disadvantages known from the prior art are reduced.
    This object is achieved by a cylinder head with the features of claim 1 and an internal combustion engine with such a cylinder head.
    Advantageous embodiments are given in the dependent claims.
    By the spark plug and the pre-chamber gas valve are arranged in a common cavity of the cylinder head, a particularly compact arrangement of Vorkammergasventil and shaft for receiving the spark plug is realized. In arrangements known from the prior art, the pre-chamber gas valve is arranged in a bore completely separated from the shaft for receiving the spark plug.
    It is preferably provided that the cavity is provided in the spark plug sleeve. Generic internal combustion engines are usually designed so that the spark plug is not screwed directly into the cylinder head, but a spark plug sleeve is provided for receiving the spark plug.
    The preferred embodiment thus provides that the common cavity for receiving spark plug and pre-chamber gas valve is formed in the spark plug sleeve.
    It can be provided that the common cavity is cylindrical. The cavity may also consist of several cylindrical sections. These do not all have to be parallel to each other.
    It is preferably provided that the spark plug and the pre-chamber gas valve are arranged in bores which penetrate each other. Thus, the case is detected in which the holes for receiving spark plug or pre-chamber gas valve are spatially so to each other that penetrate the holes. This allows the spark plug and pre-chamber gas valve to be positioned very close together.
    It can be provided that the sealing of the prechamber gas valve takes place relative to the cylinder head or the spark plug sleeve over the circumference of the prechamber gas valve. It is therefore proposed as a preferred embodiment, a radial sealing concept, wherein the sealing of the pre-chamber gas valve via a lateral surface of the pre-chamber gas valve. This is in contrast to axial sealing concepts in which the seal is made over an end face of the prechamber gas valve.
    It can be provided that the seal of the pre-chamber gas valve is formed via at least one O-ring.
    It is preferably provided that the at least one O-ring is arranged in a recess formed by projections formed on the outer wall of the prechamber gas valve. In contrast to grooves in the wall of the pre-chamber gas valve is thus provided that projections are formed on the wall of the pre-chamber gas valve. Between these preferably circumferentially extending projections, a recess is formed, which can receive an O-ring. If more than one O-ring is provided, more protrusions will be formed accordingly.
    Advantages of the present invention are, in particular: The pre-combustion gas valve is located close to the pre-chamber, which minimizes the dead space. The pre-combustion gas valve is close to the spark plug; particularly compact design. The invention is also applicable to smaller internal combustion engines (especially where packaging is problematic) - and combustion technically favorable central position of the spark plug • Replaceability of the spark plug with mounted pre-chamber gas valve
    The invention is explained in more detail by the figures. Showing:
    1a to 1c, a spark plug sleeve according to a first embodiment,
    2a to 2c, a spark plug sleeve after another
    Embodiment,
    3a to 3c, a spark plug sleeve according to a further embodiment,
    Fig. 4a to 4e A spark plug sleeve, details of gas supply concept
    Fig. 5a, 5b a pre-chamber gas valve and a variant thereof and
    Fig. 6 shows a situation according to Figure 1 a with registered spark plug.
    Figures 1a to 1c show a spark plug sleeve 4 according to a first embodiment in three views. The spark plug sleeve 4 is inserted in the installed state in a cylinder head 2 of an internal combustion engine (not shown here in its entirety).
    Thus, Fig. 1a shows a longitudinal section through the cavity 7, which receives a spark plug 6 (not shown) and a pre-chamber gas valve 5. The cavity 7 is formed in a spark plug sleeve 4 in this embodiment.
    On the one hand, the cavity 7 comprises a shaft, which is concentric about the axis of symmetry S1, of cylinder sections for accommodating a spark plug.
    The cavity 7 further has a bore 10 with symmetry axis S2 for receiving a prechamber gas valve 5.
    From the prechamber gas valve 5, a channel 8 leads to the prechamber 3. The prechamber 3 consists on the one hand of the actual cavity, ie the Flohlraum, in which the ignition of mixture takes place. Of course, the pre-chamber 3 is also a physical component. In the present embodiment, the pre-chamber 3 is designed as a separate component of the spark plug sleeve 4 and is connected to the spark plug sleeve 4, for example, pressed.
    The sake of clarity, not shown spark plug 6 is introduced via the concentric with the axis of symmetry S1 shaft in the spark plug 4 so that it is preferably flush with the prechamber 3 and their electrode (s) protrude into the pre-chamber 3. The pre-chamber 3 is enriched by the pre-chamber gas valve 5 via the channel 8 with fuel gas. After ignition in the prechamber 3, the flammable mixture passes via the overflow holes 9 into the main combustion chamber (not shown).
    Fig. 1b shows a plan view of the representation of Fig. 1a. Evident are lying within the cavity 7 parallel cylindrical shafts for receiving a spark plug 6 and a Vorkammergasventils 5. The spark plug 6 is as explained with reference to FIG. 1a not shown. Recognize the pre-chamber gas valve 5 is an octagon, with which the pre-chamber gas valve 5 is screwed into the spark plug sleeve 4. In the present exemplary embodiment, there is a largest bore diameter D1 of the cavity 7, which in a plan view circumscribes the bores for receiving the spark plug 6 and the prechamber gas valve 5. In other words, in this embodiment, there is a common shaft for spark plug 6 and pre-chamber gas valve 5.
    The center line of the largest hole with diameter D1 lies between the axes of symmetry S1 and S2. The common shaft has advantages in the assembly of spark plug 6 and pre-chamber gas valve 5, but weakens spark plug sleeve 4, since only a small wall thickness remains.
    Fig. 1 c shows a perspective view of the spark plug sleeve 4 of this embodiment.
    Figures 2a to 2c show different views of a spark plug sleeve 4 according to a further embodiment. The spark plug sleeve 4 is inserted in the installed state in a cylinder head 2 of an internal combustion engine (not shown here in its entirety). While in the embodiment according to the figures 1a to 1c, the cavity 7 has a cylindrical portion which circumscribes at its largest diameter both the bore for receiving the spark plug 6 and the bore for receiving the Vorkammergasventils 5, so in the present embodiment comprises the largest diameter of Cavity 7, the bore of the spark plug sleeve 4 is no longer entirely. Rather, the bore 10 of the prechamber gas valve 5 penetrates the spark plug bore 11 in its upper section with the largest diameter. This becomes particularly clear in the illustrations of Figure 2b and Figure 2c. In a plan view (Figure 2b) so overlap the bore 10 for receiving the Vorkammergasventils 5 and the bore for receiving the spark plug. 6
    Figures 3a to 3c show a further embodiment of a spark plug sleeve 4, which is insertable into a cylinder head 2 of an internal combustion engine. Here, too, the bore for receiving the pre-chamber gas valve 5 is not circumscribed by a largest diameter of the cavity 7. In other words, the bores for receiving a spark plug 6 and for receiving the prechamber gas valve 5 also penetrate here. In comparison to the exemplary embodiment according to FIGS. 2a to 2c, the contour of the cavity 7 is changed here. The contour of the cavity 7 is designed here such that the cylindrical bores for receiving the spark plug 6 and the prechamber gas valve 5 merge into one another. In other words, the sharp transitions of the embodiment of Figures 2a to 2c are here replaced by a smooth radius in the transition of the two holes.
    FIG. 4 a shows a section through a spark plug sleeve 4, wherein the cut has been laid in such a way that the gas supply to the pre-chamber gas valve 5 becomes clear. The cut is sketched in Fig. 4b. Evident is the gas supply channel 12, as it opens into the bore 10 which carries the pre-chamber gas valve 5. The bore 10 forms, together with the pre-chamber gas valve 5, an annular channel 13 into which the gas supply channel 12 opens. From the annular channel 13 formed by bore 10 and pre-chamber gas valve 5, the incoming gas is passed evenly into the pre-chamber gas valve 5.
    4c shows a longitudinal section through the spark plug sleeve 4. The cut is shown in FIG. 4d. As can be seen in FIG. 4c, the cutting guide is chosen here such that the part of the gas supply channel 12 extending parallel to the axis of symmetry S1 can also be seen.
    4e shows in a perspective, isometric view the arrangement of pre-chamber gas valve 5 and its gas supply. Gas is supplied through the horizontal and vertical sections of the gas supply channel 12.
    Fig. 5a shows a sectional view of the pre-chamber gas valve 5. Well recognizable is the annular channel 13 which is formed between the wall 10 of the cavity and the outer contour of the pre-chamber gas valve 5. The wall 10 can either from the
    Cylinder head 2 itself be formed or from a spark plug sleeve 4 inserted into the cylinder head 2.
    The valve needle 14 is clamped by the spring 15 against its seat. The cap 16 surrounds the spring 15 and is connected to the valve needle 14, for example via a beam welding.
    The plug 17 closes and seals the pre-chamber gas valve 5 from the top. The seal of the annular channel 13 with respect to the cavity 7 takes place radially over the O-rings 18. These are arranged in formed by the projections 19, annular receptacles. The sealing concept of the pre-chamber gas valve 5 shown here thus provides that the seal of the pre-chamber gas valve 5 radially, d. H. takes place over the outer surface of the prechamber gas valve 5.
    FIG. 5b shows a variant of FIG. 5a, in which the space 23 has a largely pear-shaped shape that tapers toward the prechamber 3. This embodiment is particularly advantageous in terms of flow.
    FIG. 6 shows a representation according to FIG. 1 a, here with the spark plug 6 drawn in.
    List of reference numbers used: 2 Cylinder head 3 Prechamber 4 Spark plug sleeve 5 Prechamber gas valve 6 Spark plug 7 Cavity 8 Channel 9 Overflow hole 10 Cavity wall 7 11 Spark plug bore 12 Gas supply channel 13 Annular channel 14 Valve needle 15 Valve spring 16 Cap 17 Plug 18 O-ring 19 Tab 20 Gas channel 21 Lower Cavity of the prechamber gas valve 22 Upper cavity of the prechamber gas valve 23 Room 24 Valve body 51 Symmetry axis 52 Symmetry axis
    Innsbruck, on February 27, 2015
    权利要求:
    Claims (8)
    [1]
    claims:
    1. Cylinder head (2) comprising - at least one prechamber (3), - at least one, in the antechamber (3) projecting spark plug (6), - at least one, in the antechamber (3) opening pre-chamber gas valve (5), characterized in that the spark plug (6) and the prechamber gas valve (5) are arranged in a common cavity (7) of the cylinder head (2).
    [2]
    2. Cylinder head according to claim 1, wherein the spark plug (6) in a spark plug sleeve (4) is arranged, characterized in that the cavity (7) in the spark plug sleeve (4) is provided.
    [3]
    3. Cylinder head according to claim 1 or 2, characterized in that the common cavity (7) is cylindrical.
    [4]
    4. Cylinder head according to at least one of the preceding claims, characterized in that the spark plug (6) and the pre-chamber gas valve (5) are arranged in bores which penetrate each other.
    [5]
    5. Cylinder head according to at least one of the preceding claims, characterized in that the seal of the pre-chamber gas valve (5) relative to the cylinder head (2) or the spark plug sleeve (4) over the circumference of the pre-chamber gas valve (5).
    [6]
    6. Cylinder head according to claim 5, characterized in that the seal of the pre-chamber gas valve (5) via at least one O-ring (18) is formed.
    [7]
    7. Cylinder head according to claim 6, characterized in that the at least one O-ring (18) is arranged in a recess formed on the outer wall of the prechamber gas valve (5) formed projections (19).
    [8]
    8. Internal combustion engine with a cylinder head (2) according to at least one of claims 1 to 7. Innsbruck, 27 February 2015
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2004099584A1|2003-05-09|2004-11-18|Yanmar Co. Ltd.|Combustion chamber structure of divided gas engine and divided gas engine|
    DE102014000229A1|2013-01-11|2014-07-17|Caterpillar Inc.|GAS COMMON RAIL FUEL SYSTEM AND THIS USING MOTOR WITH HIGH COMPRESSION RATIO|AT523273A4|2020-03-16|2021-07-15|Avl List Gmbh|CYLINDER HEAD|
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    CN101215987A|2007-12-29|2008-07-09|奇瑞汽车有限公司|Gasoline engine possessing precombustion chamber|
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    US8857405B2|2010-11-01|2014-10-14|Mahle Powertrain, Llc|Turbulent jet ignition pre-chamber combustion system for spark ignition engines|DE102012021778B4|2012-11-06|2016-03-10|Mtu Friedrichshafen Gmbh|Mixture-charged gas engine and method for compensating for volumetric deviations in a mixed supercharged gas engine|
    EP3434887B1|2017-07-25|2019-08-14|C.R.F. Società Consortile per Azioni|Internal combustion engine with gas feeding system|
    DE102017009607A1|2017-10-17|2019-04-18|Daimler Ag|Gas engine supply and ignition device and method of operating a gas engine supply and ignition device|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50160/2015A|AT516619B1|2015-02-27|2015-02-27|Cylinder head and internal combustion engine|ATA50160/2015A| AT516619B1|2015-02-27|2015-02-27|Cylinder head and internal combustion engine|
    US15/050,863| US10260450B2|2015-02-27|2016-02-23|Cylinder head|
    CN201610304818.1A| CN106014669B|2015-02-27|2016-02-23|Cylinder head|
    EP16156829.0A| EP3061962B1|2015-02-27|2016-02-23|Cylinder head|
    KR1020160021361A| KR20160105314A|2015-02-27|2016-02-23|Cylinder head|
    BR102016003817A| BR102016003817A2|2015-02-27|2016-02-23|cylinder head|
    AU2016201133A| AU2016201133A1|2015-02-27|2016-02-23|Cylinder head|
    CA2921782A| CA2921782C|2015-02-27|2016-02-24|Cylinder head|
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