• 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) with a cavity (7) for receiving a Vorkammergasventils (5), wherein a substantially or completely around the Vorkammergasventil (5) extending recess with a Vorkammergasventil (5) surrounding wall (10) of the cavity (7) an annular channel (13), wherein the annular channel (13) with at least one gas supply channel (12) for supplying the Vorkammergasventils (5) is connected to fuel gas.
    公开号:AT516618A4
    申请号:T50161/2015
    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 invention relates to a cylinder head having the features of the preamble of claim 1.
    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 is via a pre-chamber gas valve. This can be arranged in the cylinder head directly or in a spark plug sleeve.
    A generic cylinder head are known from the prior art.
    Thus, DE 10 2004 016 260 (CATERPILLAR MOTOREN GMBH) shows a gas engine with antechamber, into which gas flows in via a channel (3). In the illustrated cylinder head (1) of the gas engine is a purged prechamber (2) and a separate Gaszuführkanal (3) arranged to supply a combustion chamber (4) with gas for the ignition, wherein the usual ignition process via a spark plug (8). In the gas supply channel (3), a solenoid valve (5) is arranged in a receiving area (6) and the outlet opens directly into the combustion chamber (4).
    EP0480545 (YANMAR DIESEL ENGINE CO) shows a pre-chamber gas valve which is supplied with propellant gas via a duct (18). The gas passes through opposite holes in a cavity (138), from which the valve is open when the gas enters the antechamber.
    A disadvantage of the arrangement shown there are the increased space requirement and the cost of component alignment (correct angular orientation to ensure the gas passage).
    Object of the present invention is to provide a comparison with the prior art improved cylinder head.
    This object is achieved by a cylinder head according to claim 1. Advantageous embodiments are specified in the dependent claims.
    A cylinder head according to the invention has a cavity for receiving a prechamber gas valve, wherein a recess extending substantially or completely around the prechamber gas valve forms an annular channel with a wall of the cavity surrounding the prechamber gas valve, the annular channel being connected to at least one gas supply channel for supplying the prechamber gas valve with fuel gas.
    Advantages of the invention are in particular: - no defined angular position with respect to the longitudinal axis of the prechamber gas valve required during installation - favorable flow of fuel gas into the prechamber gas valve via the annular channel symmetry in the lower cavity of the valve even with lateral inflow over the gas supply channel possible (at more than one channel) - compact design without additional gas ducts
    It can preferably be provided that a spark plug sleeve is inserted into the cylinder head so that the wall of the cavity forming an annular channel with the prechamber gas valve is formed by the wall of the spark plug sleeve. This describes the case where the pre-chamber gas valve is not directly inserted into the cylinder head but is disposed in a plug shell.
    It can also be provided that the wall of the cavity forming an annular channel with the prechamber gas valve is formed by the wall of the cylinder head itself. In this case, the pre-chamber gas valve is directly, so used without mediation via a spark plug sleeve in the cylinder head.
    It can be provided that at least one gas channel is provided in the pre-chamber gas valve, which connects the annular channel with a lower cavity of the pre-chamber gas valve. It is therefore formed in the valve body of the pre-chamber gas valve at least one gas channel. During the operation of the prechamber gas valve, fuel gas is conducted from the annular channel in the direction of the valve seat of the prechamber gas valve through this gas channel. The valve body of the pre-chamber gas valve thus takes over in the form of the gas channel, the line of the fuel gas from the annular channel to the place of removal at the valve seat. This construction has proven to be particularly advantageous.
    It can be provided that a space is provided between the seat of the valve disk of the prechamber gas valve and the mouth of the prechamber gas valve into the prechamber or between the seat of the valve disk of the prechamber gas valve and the mouth of the prechamber gas valve.
    This describes the case in which the valve disk of the prechamber gas valve does not directly connect to the prechamber or to the channel leading to the prechamber, but instead a cavity is formed between them. By providing this space, a particularly favorable inflow of the gas from the prechamber gas valve into the prechamber (in flush arrangement of the prechamber gas valve with the prechamber) or in the channel (with spaced arrangement of the prechamber gas valve) is achieved.
    Preferably, it can be provided that the space has a largely pear-shaped, tapering towards the antechamber shape. Thus, the inflow of gas from the pre-chamber gas valve can be favorably influenced in the pre-chamber or in the channel and yet the volume can be kept small.
    It can be provided that the prechamber gas valve has at least one projection on its outer contour, the flank of which facing the annular channel also delimits the annular channel and on the other flank of which a sealing means bears against the bore for sealing the prechamber gas valve.
    This component integration is achieved in a particularly advantageous manner. The annular channel may have a radial depth corresponding to the height of the projection, deeper or less deep. Orienting yourself at the height of the projection, this allows a little disturbed geometry of the valve body. When
    Sealant is for example an O-ring in question, which seals the Vorkammergasventil radially opposite the bore. Of course, further projections may be provided which can accommodate further sealing means.
    It may be provided that a spark plug is arranged in the cylinder head, wherein the spark plug and the pre-chamber gas valve are arranged in a common cavity of the cylinder head. This is particularly advantageous in terms of a compact design. Preferably, the spark plug and the pre-chamber gas valve are arranged in mutually penetrating holes. In this way, the spark plug and the pre-chamber gas valve can be installed even more space-saving.
    The invention is explained in more detail by the figures. Showing:
    Fig. 1 a to 1c A cylinder head with spark plug sleeve
    2a to 2c, a spark plug sleeve for a cylinder head
    3a to 3c, a further spark plug sleeve for a cylinder head
    4a to 4e details of the gas supply concept
    Fig. 5a, 5b a pre-chamber gas valve and a variant of this.
    FIG. 1a shows a cylinder head 2 with a spark plug sleeve 4 inserted into the cylinder head 2. A cavity 7 is formed by the spark plug sleeve 4 in this exemplary embodiment.
    Figures 1b and 1c show the spark plug sleeve 4 in two views.
    FIG. 1a shows a longitudinal section through the cavity 7, which accommodates a spark plug 6 (not shown) and a prechamber gas valve 5.
    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 6.
    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, so the cavity 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 to the axis of symmetry S1 shaft in the spark plug sleeve 4 so that it is flush with the prechamber 3 and their electrodes protrude into the prechamber 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 pre-chamber 3 ignited mixture occurs via the overflow holes 9 in the main combustion chamber (not shown).
    Fig. 1 b shows a plan view of the representation of Fig. 1 a. 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. 1c shows a perspective view of the spark plug sleeve 4 of this embodiment.
    Figures 2a to 2c show various views of a spark plug sleeve 4 for insertion into a cylinder head 2 (not shown) according to a further embodiment. Again, the cavity 7 is formed by the spark plug sleeve 4. While in the embodiment according to the figures 1a to 1c, the cavity 7 has a cylindrical portion which at its largest diameter, both the bore for receiving the spark plug and the bore for receiving the
    Reservoir gas valve 5 circumscribes, so in the present embodiment, the largest diameter of the 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 another embodiment of a spark plug sleeve 4 for insertion into a cylinder head 2 (not shown). Again, the cavity 7 is formed by the spark plug sleeve 4.
    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.
    A gas supply channel 12 opens into an annular channel 13 which is formed between a wall 10 surrounding the prechamber gas valve 5 and the outer contour of the prechamber gas valve 5. In other words, the bore 10, together with the pre-chamber gas valve 5 forms an annular channel 13, in which the gas supply channel 12 opens.
    From the annular channel 13 formed by the wall 10 and the Vorkammergasventil 5, the incoming gas is passed evenly into the pre-chamber gas valve 5.
    In the embodiment shown here, the wall 10 is again formed by the wall of the spark plug sleeve 4.
    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.
    5a shows a sectional representation of a prechamber gas valve 5. The prechamber gas valve can be inserted into a cavity 7 formed by a cylinder head 2 (not shown here) or in a cavity 7 formed by a spark plug sleeve 4 (not shown here). The cavity 7 is thus a recess which is formed either directly in a cylinder head 2 or in a spark plug sleeve 4 and which can accommodate a prechamber gas valve 5.
    Clearly visible is the annular channel 13 which is formed between the wall 10 of the cavity 7 and the outer contour of the pre-chamber gas valve 5. The wall 10 may be formed either by the cylinder head 2 itself or by a spark plug sleeve 4 inserted into the cylinder head 2. This possibility has been explained on the basis of the exemplary embodiments according to FIGS. 1-4.
    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.
    List of reference numbers used: 1 Internal combustion engine 2 Cylinder head 3 Prechamber 4 Spark plug sleeve 5 Prechamber gas valve 6 Spark plug 7 Cavity 8 Channel 9 Overflow bore 10 Wall of cavity 7 11 Spark plug bore 12 Gas supply channel 13 Ring channel 14 Valve needle 15 Valve spring 16 Cap 17 Plug 18 O-ring 19 Tab 20 Gas duct 21 Lower Cavity of Pre-chamber Gas Valve 22 Upper Cavity of Pre-chamber Gas Valve 23 Space 24 Valve Body 51 Symmetry Axis 52 Symmetry Axis
    Innsbruck, on February 27, 2015
    权利要求:
    Claims (9)
    [1]
    claims
    1. Cylinder head (2) with a cavity (7) for receiving a Vorkammergasventils (5), characterized in that a substantially or completely to the Vorkammergasventil (5) extending recess with a Vorkammergasventil (5) surrounding the wall (10) of the cavity (7) forms an annular channel (13), wherein the annular channel (13) with at least one gas supply channel (12) for supplying the Vorkammergasventils (5) is connected to fuel gas.
    [2]
    2. Cylinder head (2) according to claim 1, characterized in that in the cylinder head (2) a spark plug sleeve (4) is inserted, so that with the Vorkammergasventil (5) an annular channel (13) forming wall (10) of the cavity (7 ) is formed by the wall of the spark plug sleeve (4).
    [3]
    3. Cylinder head (2) according to claim 1, characterized in that with the Vorkammergasventil (5) an annular channel (13) forming wall (10) of the cavity (7) by a wall of the cylinder head (2) itself is formed.
    [4]
    4. Cylinder head (2) according to at least one of the preceding claims, characterized in that in the pre-chamber gas valve (5) at least one gas channel (20) is provided, which connects the annular channel (13) with a lower cavity (21) of the pre-chamber gas valve (5) ,
    [5]
    5. Cylinder head (2) according to at least one of the preceding claims, characterized in that between the seat of a valve disk of Vorkammergasventils (5) and the mouth of the pre-chamber gas valve (5) in an antechamber (3) or between the seat of the valve disk of Vorkammergasventils (5) and the opening of the prechamber gas valve (5) in a leading to a pre-chamber (3) channel (8) a space (23) is provided.
    [6]
    6. Cylinder head (2) according to claim 5, characterized in that the space (23) has a largely pear-shaped, the antechamber (3) towards tapered shape.
    [7]
    7. Cylinder head (2) according to at least one of the preceding claims, characterized in that the prechamber gas valve (5) on its outer contour at least one projection (19), the annular channel (13) facing edge mitbegrenzt the annular channel (13) and at its another flank a sealing means for sealing the Vorkammergasventils (5) relative to the bore (10) is present.
    [8]
    8. Cylinder head (2) according to at least one of the preceding claims, characterized in that in the cylinder head (2) a spark plug (6) is arranged, wherein the spark plug (6) and the pre-chamber gas valve (5) in a common cavity (7) of the Cylinder head (2) are arranged.
    [9]
    9. Cylinder head (2) according to claim 7, characterized in that the spark plug (6) and the pre-chamber gas valve (5) are arranged in mutually penetrating bores. Innsbruck, on February 27, 2015
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50161/2015A|AT516618B1|2015-02-27|2015-02-27|cylinder head|ATA50161/2015A| AT516618B1|2015-02-27|2015-02-27|cylinder head|
    EP16156827.4A| EP3064755B1|2015-02-27|2016-02-23|Cylinder head|
    US15/050,914| US10100714B2|2015-02-27|2016-02-23|Cylinder head|
    KR1020160021372A| KR101879488B1|2015-02-27|2016-02-23|Cylinder head|
    BR102016003820A| BR102016003820A8|2015-02-27|2016-02-23|engine head|
    CA2921627A| CA2921627C|2015-02-27|2016-02-23|Cylinder head|
    AU2016201130A| AU2016201130A1|2015-02-27|2016-02-23|Cylinder head|
    CN201610305111.2A| CN106014670B|2015-02-27|2016-02-23|Cylinder head|
    JP2016031916A| JP6307102B2|2015-02-27|2016-02-23|cylinder head|
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