• 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 disclosure relates to an improved prechamber device (12) for an internal combustion engine (10). The pre-chamber device (12) is disposed adjacent to a combustion chamber (16). The improved prechamber device (12) is configured to enhance the removal of heat from the prechamber device, particularly in the area adjacent to the prechamber device (12).
    公开号:AT514055A2
    申请号:T9504/2012
    申请日:2012-10-16
    公开日:2014-09-15
    发明作者:
    申请人:Cummins Ip Inc；
    IPC主号:
    专利说明:

    ≫ κ
    1
    PRE-CHAMBER DEVICE FOR A COMBUSTION ENGINE TECHNICAL FIELD
    This disclosure relates to an improved prechamber device for an internal combustion engine. The pre-chamber device is arranged next to a combustion chamber. The improved prechamber device is designed to improve the heat removal from the prechamber device, especially in the area adjacent to the combustion chamber.
    BACKGROUND
    Indirect injection internal combustion engines mix fuel and air in a cavity remote from the combustion chamber. This same cavity is where the ignition of the fuel and air occurs. The cavity is part of a device called a prechamber. Indirect injection internal combustion engines offer advantages in simple fuel injection and allow the use of designs with reduced tolerances compared to direct injection internal combustion engines. In addition, some spark ignition engines use a prechamber device (either fuel or passive) to increase the ignition energy applied to the charge in the main combustion chamber. During operation of these engines, gases flow both into and out of the prechamber device, depending on the pressure difference between the inner cavity and the prechamber device and the main chamber. At a certain point during the compression stroke, gas including both fuel and air flows from the main chamber into the prechamber device. A fueled pre-chamber device will introduce additional fuel into the prechamber device to remove the contents of the pre-ignition device
    2
    Increase prechamber device; a passive prechamber device will not do this. After ignition, the pressure inside the prechamber device will rise above that of the main chamber and the contents of the prechamber device, which includes burnt and unburned fuel, will be injected into the main chamber to start the combustion process.
    Proximity to fuel combustion and to the combustion chamber causes significant thermal stresses on the prechamber device, resulting in the need to operate the prechamber device at a significant cost to a user and with long downtime for a user. There is therefore a need for an improved prechamber which is capable of reducing thermal stresses to improve the life of a prechamber device.
    SHORT VERSION
    This disclosure provides a prechamber device for an internal combustion engine having a shell formed from a first material having a first thermal conductivity and a first strength. The shell comprises an inner region comprising an inner wall, an outer region comprising an outer wall, at least one open region formed in the outer wall at a periphery of the pre-chamber device, a cavity located between the inner region and the outer region is formed, a chamber formed by the inner wall. A thermally conductive core region is disposed within the cavity. The thermally conductive core region is disposed in physical contact with the inner region and the outer region and is exposed by the at least one open region in the outer wall. The thermally conductive core portion is formed of a second material having a second thermal conductivity greater than the first thermal conductivity and a second strength less than the first strength. 3/32
    I ···············································································································································································
    This disclosure also provides a prechamber device for an internal combustion engine having a shell formed from a first material having a first thermal conductivity and a first strength. The shell comprises a cylindrical inner region, a cylindrical outer region, a chamber formed by the inner region, the chamber having an opening at a first end, a cavity formed between the inner region and the outer region, a connection portion formed at a second end of the prechamber device facing the first end in the longitudinal direction, the connection portion extending between and connected to the inner portion and the outer portion, and a distal end of the connection portion outer surface of the second end of the pre-chamber device forms, and at least one passage in the
    Connecting portion is formed, wherein the passage from the chamber and extends through the shell, at least one passage which in the
    Connection area is formed, wherein the passage connects the chamber with an environment of the prechamber device. A thermally conductive core region formed of a second material having a second thermal conductivity greater than the first thermal conductivity and a second strength lower than the first strength is located within the cavity adjacent to the interior region and to the outer area.
    This disclosure also provides an internal combustion engine having an engine body, a combustion chamber formed in the engine body, a piston disposed in the engine block near the combustion chamber, a combustion igniter disposed in a combustion igniter chamber on the engine block and including an ignition element , a plurality of coolant flow passages containing a liquid coolant and formed in the engine block, and a prechamber device disposed between the combustion igniter and the combustion chamber. The pre-chamber device comprises a shell made of a first material with a 4/32
    The first thermal conductivity and a first strength are formed. The shell comprises an inner region having an inner wall, an outer region having an outer wall, a chamber formed by the inner region, a first end of the chamber including an opening located near the firing element, and wherein Injection end located longitudinally opposite the first end comprises at least one injection passage extending between the chamber and the combustion chamber and at least one cavity formed by the outer region and the inner region. A thermally conductive core region formed of a second material having a second thermal conductivity greater than the first thermal conductivity and a second strength less than the first strength is at least partially adjacent within the at least one cavity arranged to the inner area and the outer area. The plurality of coolant flow passages supply the outer portion of the prechamber device with liquid coolant. The prechamber device is sealed about its circumference at each end for preventing liquid coolant from flowing into the combustion chamber and for preventing liquid coolant from flowing into contact with the combustion igniter.
    Advantages and characteristics of the embodiments of this disclosure will become more apparent from the following detailed description of exemplary embodiments when taken in conjunction with the accompanying drawings.
    BRIEF DESCRIPTION OF THE FIGURES
    FIG. 1 is a partial sectional view of a portion of an internal combustion engine incorporating an exemplary embodiment of the present disclosure. FIG.
    FIG. 2 is a perspective view of a prechamber device according to an exemplary embodiment of the present disclosure. FIG. 5/32 * • ···················································································································································································
    Fig. 3 is a sectional view of the prechamber device of Fig. 2 through the longitudinal axis of the prechamber device taken along line 3-3.
    FIG. 4A is a perspective view of the prechamber device of FIG. 2 with the prechamber device cut at an angle through a rib and through a portion of the thermally conductive core. FIG.
    Figure 4B is a perspective view of the shell of the prechamber device of Figure 2, wherein the shell is cut at an angle through a rib and through a portion of the shell designed to hold the thermally conductive core.
    FIG. 5 is a perspective view of a thermally conductive core of the prechamber device of FIG. 2 in accordance with an exemplary embodiment of the present disclosure. FIG.
    FIG. 6 is a perspective view of a thermally conductive core of FIG
    An antechamber device according to a second exemplary embodiment of the present disclosure.
    FIG. 7 is a perspective view of a thermally conductive core of FIG
    A prechamber device according to a third exemplary embodiment of the present disclosure.
    8 is a sectional view of an antechamber apparatus according to a fourth exemplary embodiment of the present disclosure, wherein the section has been taken at an angle through a rib area and through a void area including a core of the prechamber device.
    Fig. 9 is a sectional view of a shell of the pre-chamber device of Fig. 8. 6/32 6 • • • • • • • • • • • • • • • • • • • · • • • • •
    10 is a sectional view of an atrial device sheath according to a fifth exemplary embodiment of the present disclosure, taken at an angle through a rib area and through a void area of the pre-chamber device.
    DETAILED DESCRIPTION
    Referring now to FIG. 1, the present disclosure is directed to an internal combustion engine, a portion of which is shown in cross-sectional view and generally designated 10 and having an improved prechamber device 12. The internal combustion engine 10, which may also include an engine body, has a cylinder head 14. The cylinder head 14 forms part of a combustion chamber 16. The combustion chamber 16 may also include a piston 18 which is reciprocally mounted in a cylinder cavity (not shown) adjacent to the combustion chamber 16. Within a firing bore 20, a combustion fuze bearing 22 is arranged. Supported within a combustion igniter chamber 23 formed in the combustor liner 22 is a combustion igniter 24. The combustion igniter 24 may include an igniter element 26. The prechamber device 12 is disposed between the combustion igniter 24 and the combustion chamber 16.
    A coolant passage 28, which may be formed as part of the cylinder head 14, supplies areas 30 in the vicinity of the prechamber device 12 with cooling fluid. The cooling fluid may also be located near the combustor liner 22.
    Other elements may be located near the combustion chamber 16. For example, one or more valves 32 may provide intake and exhaust locations for air and / or fuel to enter the combustion chamber 16 and for exhaust gases to exit the combustion chamber 16. A valve seat 34 may be connected to each valve 32 to provide the valve 32 with a resting location when ·· t 9 · # this is closed.
    With reference to FIGS. 2-5, a prechamber device 12 is shown in accordance with an exemplary embodiment of the present disclosure. 2 shows a perspective view of an exemplary embodiment of the prechamber device 12. The prechamber device 12 includes a shell 36 that has an exterior that includes an exterior wall 38. The outer wall 38 may have a cylindrical shape and may include one or more openings or holes 42 formed in a circumference thereof, exposing a thermally conductive core 40 located in a cavity 41 that is between the outer and outer walls Wall 38 and an interior of the shell 36, which comprises an inner wall 46 is formed. The inner wall 46 may have a cylindrical shape. One or more side openings or holes 42 allow the cooling fluid from the coolant passages 28 to directly contact the thermally conductive core 40. If there are a plurality of openings 42, the openings 42 may be evenly distributed over the circumference of the prechamber device 12, as shown in FIG. 2, or may be distributed asymmetrically. One or more cavity openings, end openings or holes 44 may be used during a manufacturing operation to insert the thermally conductive core 40 into the shell 36. Although the hole 44 is formed at a proximal end of the prechamber device 12, a hole which allows the material of the core 40 to be inserted into the sheath 36 may also be formed elsewhere on the prechamber device 12. For example, an opening may be formed on the periphery, as described in more detail below.
    The inner wall 46 may define a chamber 48. As shown in Figures 1, 4A and 4B, the chamber 48 may have an opening 50 which can receive the combustion igniter 24, particularly the ignition element 26. The fins 52 may connect the outer wall 38 to the inner wall 46 to the prechamber device 12 give strength. The ribs 52 would therefore divide the cavity 41 into a plurality of cavities. The ribs 52 may be formed as part of the shell 36 or separately. The ribs 52 may include one or more rib openings or passages 54 formed in the ribs to allow the thermally conductive core 40 to fill the plurality of cavities 41 formed by the ribs 52 during manufacture , The rib openings or passages 54 may also aid in the distribution of thermal energy. During manufacture, the material forming the core 40 may have melted and may be inserted into the cavity 41 of the sheath 36 through the end openings 44. The sheath 36 may be preheated to the melting point of the material forming the core 40 before the core 40 is inserted to assist this process. The materials proposed for use as a shell 36 have a higher melting point than the materials proposed for use as the core 40, allowing the shell 36 to retain its shape during this process. After the thermally conductive core 40 has been inserted into the cavity 41, the assembly can be cooled in a manner that helps in reducing stress in the prechamber device 12. Once the core 40 has hardened, it will be substantially contiguous or in direct contact with the outer wall 38 and the inner wall 46, and the prechamber device 12 will be a solid composite structure. It is preferred that the core 40 be in the greatest possible contact with the outer wall 38 and the inner wall 46. However, the manufacturing process may trap air between the core 40 and the outer wall 38 and between the core 40 and the inner wall 46, resulting in locations where the core 40 will not be in contact with either the outer wall 38 or the inner wall 46 like. There may also be a separation between the core 40 and the outer wall 38 or the core 40 and the inner wall 46 due to differences in thermal conductivity and cooling rates due to local impurities of the core 40, the outer wall 38 or the core 40 or 40 due to other circumstances.
    The cavity 41 may have many different configurations. As shown in FIGS. 4A and 4B, the transfer passages 43 may be provided with one or two 9/32 9 •······························································ ♦·························································································································································································································· It should be noted that the pockets 64 are actually passages 64 connecting a transfer passage 43 and thus a leg 70 to one or more transfer passages 43 and legs 70. An advantage of the pockets or passages 64 is that they are in a location where high temperatures prevail during operation of the engine 10. The thermally conductive core 40 is therefore capable of directing heat from the region of the connection region 60 in the prechamber device 12 up to an area where the cooling fluid can conduct the heat away from the prechamber device 12 while the engine 10 is operating , Similarly, heat may be transferred from the chamber 48 to an area where cooling fluid may conduct the heat away from the prechamber device 12.
    Referring to FIG. 6, the core portion 45 of the core 40 is disposed in pockets or passages 64. However, the transfer passages 43 and pockets 64 may be omitted and the rib openings or passages 64 may be omitted so that each leg 70 is completely separated from each other. Other alternative configurations are described below.
    The sheath 36 may have a minimum thickness of 1 mm. However, the thermally conductive core 40 may occupy at least 30% of the thickness of the prechamber device 12 for at least 50% of the longitudinal length of the prechamber device 12. The thickness is dimensioned radially from the side of the inner wall 46 of the chamber 48 to the region of the outer wall 38 farthest from the longitudinal axis 76 of the prechamber device 12. The 50% of the longitudinal length may be any length of the prechamber device 12 that satisfies the 30% thickness recommendation, such as the length 78 shown in FIG. 3. The thermally conductive core 40 may occupy less than the thickness of the prechamber device 12 and a shorter length but it may also cause a reduction 10/32 • ··························································································· · 10 ............. give the benefits of the present disclosure. The design goal is that the sheath be thick enough to accommodate the applied loads during operation while optimizing the volume of the core material. These requirements will determine the thickness of the sheath and whether the ribs 52 are required and, if ribs 52 are required, the number of ribs 52 required. While much of these explanations are focused on the sheath 36, the goal is to increase the size, in particular, to optimize the thickness and shape of the thermally conductive core 40 to obtain an optimum temperature profile of the prechamber device 12.
    It should be understood from the foregoing description that the thermally conductive core 40 may be a single piece of metal, as shown by the core 40a in FIG. 5, extending from one or more pockets 64, which will be described in more detail below one or more side openings or holes 42 extends to end openings 44. However, in a second exemplary embodiment, the rib openings or passages 54 in the ribs 52 may be omitted, which would mean that each pillar or leg 70 would be independent of adjacent pillars or legs 70 and only in the bottom region 72 of the core 40b through portions of the core 40b extending through the pockets 64 as shown in FIG. 6 would be connected. Likewise, in a third exemplary embodiment, the ribs 52 may not be needed, in which case the core 40c could have a solid periphery with open areas in the bottom region 72 where connecting regions 60 of the shell 36 would be located, such as in FIG. 7. Likewise, the upper portion 74 of the outer wall 38 beyond one or more side openings or holes 42 may be unnecessary depending on the material selected for the thermally conductive core 40 and the pressure expected in the chamber 48. While the thermally conductive core 40 is shown extending to the top of the prechamber device 12, certain design requirements may not assume that the core 40 extends beyond the region where cooling fluid is near the exterior of the prechamber device 12 when in use 11/32 11 ········································································································································································································ A fourth exemplary embodiment of an antechamber device 112 shown in FIGS. 8 and 9 has a configuration in which the core 40d extends from a region in the cavity 41a of the sheath 136a near one or more injection ports 58, which is described in detail will be described later, and ends in a region in the cavity 41a of the sheath 136a just above the side openings 142. A fifth exemplary embodiment of the prechamber sheath 136b is shown in FIG. The cavity 41b of the sheath 136b may include one or more transfer passages 143 and one or more passages or pockets 164. The cavity 41b extends from one or more passages or pockets 164 located between one or more injection passages 58 and the distal end 162 of the sheath 136b, and the cavity 41b terminates in a region proximate one or more openings or apertures 142b. Regions of the core 40 that are exposed to air, fuel, or coolant may be coated or treated to prevent or reduce the effects of corrosion on the exposed areas of the core 40.
    One end of the chamber 48 has an injection end 56. Within the injection end 56 are formed one or more passages or injection ports 58 extending from the chamber 48 to the periphery of the shell 36 in an area near the combustion chamber 16. The injection ports 58 permit ignited fuel and air to move from the chamber 48 to the combustion chamber 16, causing ignition of fuel and air in the combustion chamber 16. The injection ports 58 may be part of the connecting portion 60 that connects the outer wall 38 to the inner wall 46. The connection region 60 may have an outer region, an outer side region or a remote end 62. Between the portion of the connection portion 60 containing the injection ports or passages 58 and the distal end 62 of the connection portion 60, one or more pockets 64 may be formed in which a portion of the thermally conductive core 40 may be located. The pockets 64 offer significant advantages in controlling the thermal stresses in the bonding area 60. Heat may be conducted through the thermally conductive core 40 away from the pockets 64 to one or more open areas or holes 42, allowing for a Coolant or a cooling fluid removes the heat.
    As shown in FIG. 3, the pockets or passages 64 may be located within a particular location relative to the chamber 48 and an end portion or outside portion 62 of the prechamber device 12. For example, pockets 64 may be located either partially or completely radially or transversely within an imaginary axial extent 80 of the outer dimensions of the lower portion of the chamber 48, adjacent along the axis 76. In the exemplary embodiment, the pockets 64 are located axially or longitudinally along the prechamber device between the injection ports 58 and the distal end 62. There may be a single pocket 64 located in the connection area 60 or a plurality of pockets 64. If there are a plurality of pockets 64, they may be distributed symmetrically or asymmetrically about the longitudinal axis 76. While a single pocket 64 reduces the temperature of the connection region 60 during combustion processes, a plurality of pockets or passages 64 distributed about the longitudinal axis 76 provide the greatest advantage in terms of temperature reduction in the connection region 60 during operation of the internal combustion engine 10.
    The material of the shell 36 may be a high alloy steel, such as a nickel-chromium coating, or a stainless steel having a first strength and a first thermal conductivity. The material of the thermally conductive core 40 may be a copper or aluminum coating having a second strength and a second thermal conductivity.
    The material of the core 40 is chosen essentially for thermal conductivity properties, which usually means that the material 13/32 of the thermally conductive core 40 will be weaker than the material of the sheath 36 Substantially selected for strength properties to be able to carry pressure and thermal loads from the chamber 48 and the combustion chamber 16. However, the materials commonly chosen to carry the aforesaid loads typically have insufficient thermal conductivity to prevent heat buildup in the prechamber device 12, particularly in the region of the bond region 60. Excessive heat may result in conditions that are considered to be defective such as premature ignition, tip breakage, erosion of nozzle holes or injection ports, tip melting, etc. The thermal conductivity coefficient of
    Aluminum and copper coatings are greater than or equal to 30 W / m2-K. The thermal conductivity coefficient of nickel-chromium coatings and stainless steel materials is less than or equal to 20 W / m2-K. The relatively low thermal conductivity coefficient of the nickel-chromium coating, stainless steel, and other similar materials results in temperatures greater than desired in the region of the bond region 60, and possibly other regions of the prechamber device 12. The formation of the core 40 and placement of a material having a higher coefficient of thermal conductivity into the core 40 provides significant temperature reduction in areas exposed to high heat during operation, as further explained below. The advantage of the present disclosure is that the pre-chamber 12 receives the benefits of the strength of the sheath 36 with the thermal conductivity of the core 40.
    The shell 36 may be formed by laser sintering, metal injection molding, investment casting, and other techniques capable of producing the properties described in this disclosure, such as by factory fabrication or workpiece machining. The hollow core 36 may also be formed as a plurality of pieces and then bonded together by insertion of the thermally conductive core 40, by mechanical bonding, or by other techniques 14/32 • · · ♦ ···· · · · · · · · · . The thermally conductive core 40 may be formed in the sheath 36 by one or more techniques. Because higher thermal conductivity materials generally melt at lower temperatures than lower thermal conductivity materials, the core 40 material can be melted and poured into the shell 36. The core 40 may also be injected into the sheath 36 with appropriate support on the outer surfaces of the sheath 36. The sheath 36 may be formed as shown in this disclosure, or may be formed with solid outer walls and machined after insertion of the core 40 to expose the core 40 at one or more openings or holes 42.
    As described above, a method of inserting the core 40 into the cavity 41 is to introduce the material of the core 40 when the material has melted. The core 40 may be inserted into the cavity 41 through one or more openings 44. The molten material of the core 40 flows into the cavity 41 and can then flow into the region of one or more transfer passages 43. The material of the core 40 may then flow through the one or more transfer passages 43 into the one or more pockets or passages 64 formed in the connection region 60 to locate the material of the core 40 in areas where during operation of the engine 10 high temperatures prevail. In configurations where there are a plurality of separate cavities formed in a shell of a prechamber device, it may be necessary for the molten material of the core to be introduced into each separate cavity through an opening or a hole connected to that cavity , In configurations where the cavity of a prechamber device does not extend to a near surface of the prechamber device, such as the configuration shown in FIG. 9, it may be necessary for the material of the core 40d to be in one or more openings or holes 142a formed at a circumference or other location of the sheath 136a. 15/32 15 ···· ···· ······················································· ·····
    A finite element analysis shows that a massive prechamber with high strength steel could have a peak temperature of greater than 800 ° C in the area of the injection ports. An exemplary embodiment of the present disclosure shows a peak temperature of less than 400 ° C in the areas of injection ports 58.
    The prechamber device 12 may be fluidly sealed at its circumference at at least two locations when attached to an engine body or
    Internal combustion engine 10 is mounted. A sealing point 66 may be located in the outer wall 38, where the outer wall 38 on the
    Combustion ignition bearing 22 hits. The intent behind the fluid seal is to prevent leakage of liquid coolant from the coolant passages 28 into the chamber 48 and contact thereof with the igniter element 26. Another seal may be at a location 68 that may be located at one or more locations on the prechamber device 12 between the distal end 62 of the connection portion 60 and one or more side openings 42. The seal at location 68 serves to prevent leakage of the cooling liquid into the combustion chamber 16.
    The various embodiments of prechamber devices shown herein are compatible with engine configurations that require passive and fueled prechamber devices. The internal combustion engine 10 and one of the pre-chamber devices shown herein may be modified to allow fuel injection or a mixture of air and fuel to be injected into the chamber 48 where ignition may occur, creating significant heat and pressure in the chamber 48 and causes combustion gases to flow into the combustion chamber 16. Fuel and air may also be injected directly into the combustion chamber 16. Fuel ignition may occur outside of the prechamber device 12 in an area around one or more ice injection passages 58 and the remote end 62 or within the 16/32 # · # ······ ♦♦♦♦♦ · · · · · ·······················. ······ ······· · ··· 16 .............
    Chamber 48 occur. The fuel ignition may start in either the chamber 48 or the combustion chamber 16 and then move to the opposite chamber. During a compression stroke of a piston 18, the pressure in the combustion chamber 16 will urge combustion gases into the chamber 48. Depending on whether the pressure in the chamber 48 or the combustion chamber 16 is greater, therefore, combustion gases may flow either into or out of the chamber 48 from or to the combustion chamber 16. The core 40 will move heat from locations where fuel ignition occurs or where hot combustion gases are flowing, such as chamber 48 or the area adjacent the far end 62, to an area where the cooling fluid can dissipate heat. The area of heat dissipation may include an opening, such as opening 42 shown in FIG. 3. The prechamber devices shown here can also be used with engines that do not use a spark plug. While various embodiments of the disclosure have been shown and described, it is to be understood that these embodiments are not limited thereto. The embodiments may be changed, modified or further developed by those skilled in the art. Therefore, these embodiments are not limited to the details shown and described above, but include all such changes and modifications. 17/32
    权利要求:
    Claims (34)
    [1]
    17 ··· «· · · · · · ····································································································································································································································· A sheath formed of a first material having a first thermal conductivity and a first strength, the sheath comprising: an inner region comprising an inner wall, an outer region comprising an outer wall, at least one open region; is formed in the outer wall at a periphery of the prechamber device, a cavity formed between the inner region and the outer region, a chamber formed by the inner wall, and a thermally conductive core region disposed within the cavity in physical Contact with the inner region and the outer region is arranged, and is exposed by the at least one open area in the outer wall, wherein the thermally conductive core area au s a second material having a second thermal conductivity, which is greater than the first thermal conductivity, and a second strength, which is smaller than the first strength, has formed. 18/32 18 18
    [2]
    The prechamber device of claim 1, wherein the at least one open area is a plurality of holes formed in the outer wall.
    [3]
    The prechamber device of claim 1, wherein the prechamber device has a first end and a second end, and wherein the first end includes a connection region connecting the outer region to the inner region.
    [4]
    The prechamber device of claim 3, wherein the thermally conductive core portion is located within the at least one pocket formed in the connection region.
    [5]
    5. The prechamber device of claim 4, wherein the cavity forms a cavity opening at the second end of the prechamber device and the cavity opening exposes the thermally conductive core region and wherein the thermally conductive core region extends from the at least one pocket to the cavity opening.
    [6]
    6. pre-chamber device according to claim 1, 19/32 ···· ···· ············································································· 19 wherein the cavity occupies at least 30% of the distance from the inner wall radially outward to the outer wall for at least 50% of the longitudinal length of the prechamber device.
    [7]
    7. pre-chamber device according to claim 1, wherein a plurality of ribs, which are arranged between the inner region and the outer region divides the cavity into a plurality of spaces.
    [8]
    The prechamber device of claim 1, wherein the first material is selected from a group comprising a nickel-chromium alloy and stainless steels.
    [9]
    The prechamber device of claim 1, wherein the second material is selected from a group comprising copper alloys and aluminum alloys.
    [10]
    10. A prechamber device for an internal combustion engine comprising: a shell formed of a first material having a first thermal conductivity and a first strength, the shell comprising: a cylindrical inner region, a cylindrical outer region, a chamber defined by the inner Area is formed, wherein the chamber 20/32 20 has an opening at a first end, a cavity, which between the inner Area and the outer region is formed, a connecting portion, which is formed at a second end of the prechamber device, which is opposite to the first end in the longitudinal direction, wherein the connecting portion between the inner region and the outer region extends and is connected thereto, and wherein a distal end of the connecting portion is an outer surface of the second end of the prechamber device, and at least one passage formed in the connection region, the passage connecting the chamber to an environment of the prechamber device, and a thermally conductive core portion made of a second material having a second thermal conductivity greater than the first thermal Conductivity is, and a second strength, which is lower than the first strength, is formed, and which is located within the cavity adjacent to the inner region and the outer region.
    [11]
    The prechamber device of claim 10, wherein an extension of the thermally conductive core portion is longitudinally between the chamber and the distal end.
    [12]
    The prechamber device of claim 11, wherein at least one pocket is formed longitudinally between the chamber and the distal end, and the extension of the thermally conductive 21/32 21/32 ································································· · 1 · ··· ··· · core area located within the at least one pocket.
    [13]
    13. The prechamber device of claim 10, wherein the connecting portion comprises the at least one pocket and the thermally conductive core portion extends into the pocket.
    [14]
    14. The prechamber device of claim 13, wherein the at least one pocket is located at least partially between the chamber and the distal end of the connection area.
    [15]
    15. The prechamber device of claim 14, wherein the at least one pocket is formed at least partially along a longitudinal line between the at least one passage and the distal end of the connection region.
    [16]
    16. The prechamber device of claim 13, further comprising a longitudinal axis, wherein the at least one pocket is a plurality of pockets disposed symmetrically about the longitudinal axis.
    [17]
    The prechamber device of claim 10, wherein the cavity at the first end of the prechamber device is open to form a cavity opening. 22/32 ► · ···· 22 · * ··· * * ·· '1 · * # · Wherein the thermally conductive core region is located within the at least one pocket formed in the connection region, and wherein the thermally conductive core region extends from the at least one pocket to the cavity opening.
    [18]
    18. The prechamber device of claim 10, wherein the cavity occupies at least 30% of the distance from the inner wall radially outward to the outer wall for at least 50% of the longitudinal length of the prechamber device.
    [19]
    The prechamber device of claim 10, wherein a plurality of ribs disposed between the inner portion and the outer portion divide the cavity into a plurality of spaces.
    [20]
    The prechamber device of claim 10, wherein the first material is selected from a group comprising a nickel-chromium alloy and stainless steels.
    [21]
    The prechamber device of claim 10, wherein the second material is selected from a group comprising copper alloys and aluminum alloys.
    [22]
    22. An internal combustion engine comprising: an engine body, a combustion chamber formed in the engine body, a piston disposed in the engine block near the combustion chamber, a combustion fuze disposed in a combustion lighter chamber at the engine body An engine block is disposed and includes an ignition element, a plurality of coolant flow passages containing a liquid coolant and formed in the engine block, an antechamber device disposed between the combustion igniter and the combustion chamber, and comprising: a shell made of a first material with a first thermal conductivity and a first strength, the shell comprising: an inner region having an inner wall, an outer region having an outer wall, a chamber formed by the inner region, a first end of the chamber having an opening which is close to the ignition an injection end located longitudinally opposite the first end, comprising at least one injection passage extending between the chamber and the combustion chamber, and at least one cavity formed by the outer region and the inner region, and 24/32 24 • · 24 • · > · ··· · ♦ · · · · «

    A thermally conductive core region formed of a second material having a second thermal conductivity greater than the first thermal conductivity and a second strength lower than the first strength, and at least partially within the at least one a plurality of coolant flow passages supplying the outer portion of the prechamber device with liquid coolant and wherein the prechamber device is sealed about its periphery at each end for preventing a flow of liquid coolant into the combustion chamber and for preventing a flow of liquid coolant into contact with the igniter.
    [23]
    23. The engine of claim 22, wherein the thermally conductive core portion is exposed to the environment of the prechamber device through at least one open area formed in the outer wall.
    [24]
    24. The engine of claim 22, wherein the thermally conductive core portion is exposed to the environment of the prechamber device through a plurality of openings disposed around the prechamber device.
    [25]
    25. The engine of claim 22, wherein the injection end includes a connection portion connecting the outer portion to the inner portion, and wherein the connection portion includes a distal end. 25/32 ·· 25


    [26]
    26. The motor of claim 25, wherein the thermally conductive core region is located within at least one pocket formed in the connection region.
    [27]
    27. The engine of claim 26, wherein the at least one pocket is at least partially formed between the at least one injection passage and the distal end of the connection portion.
    [28]
    28. The motor of claim 26, wherein the pre-chamber device further comprises a longitudinal axis and the chamber includes a lower portion of outer dimensions and wherein the at least one pocket is at least partially within an imaginary axial extent of the outer dimensions of the lower portion of the chamber along the longitudinal axis.
    [29]
    29. The engine of claim 25, wherein the cavity is open at the first end of the prechamber device to form a cavity opening and the cavity opening exposes the thermally conductive core region.
    [30]
    30. The motor of claim 29, wherein the thermally conductive core portion is located within at least one pocket formed in the connection region and extends from the at least one pocket to the cavity opening. 26/32 26 • ·
    [31]
    31. The engine of claim 22, wherein the cavity occupies at least 30% of the distance from the inner wall radially outward to the outer wall for at least 50% of the longitudinal length of the prechamber device.
    [32]
    32. The motor of claim 22, wherein a plurality of ribs formed of a first material and disposed between the inner region and the outer region divides the cavity into a plurality of spaces.
    [33]
    33. The engine of claim 22, wherein the first material is selected from a group comprising a nickel-chromium alloy and stainless steels.
    [34]
    34. The engine of claim 22, wherein the second material is selected from a group comprising copper alloys and aluminum alloys. 27/32
    类似技术:
    公开号 | 公开日 | 专利标题
    DE112012005045B4|2019-07-18|Prechamber device for an internal combustion engine
    EP3339617B1|2021-02-17|Cylinder housing, method for producing a cylinder housing and casting core
    DE102015111966A1|2016-02-11|Hole bridge cooling channel
    DE60221284T2|2008-04-10|COMPONENT FOR EXPLOITING WITH HIGH THERMAL LOAD IN OPERATION AND METHOD FOR PRODUCING SUCH A COMPONENT
    DE2245599A1|1973-06-28|FRICTION-WELDED METAL ARTICLE AND PROCESS FOR ITS MANUFACTURING
    DE102004024839A1|2005-01-27|Pre-chamber spark plug with a flat base aligned with a bottom of a cylinder head
    WO2006056315A1|2006-06-01|Piston with a lightweight construction that is subjected to high thermal stress
    EP2803827B1|2015-11-18|Metallic hollow valve
    DE102018108117A1|2018-10-18|CYLINDER BUSHING FOR INTERNAL COMBUSTION ENGINE
    DE1775274A1|1971-07-08|Valve seat insert
    EP0277548B1|1991-09-25|Rotating piston engine
    DE2252545A1|1973-05-03|PROCESS FOR MANUFACTURING A FLUID CIRCULATION COOLED SCREW HEAD VALVE FOR AN COMBUSTION ENGINE AND VALVE
    DE102012111521A1|2014-05-28|Method for producing a cylinder crankcase
    DE2459423A1|1975-06-19|USE FOR THE FORMATION OF AN AUXILIARY CHAMBER IN THE COMBUSTION ROOM OF A COMBUSTION POWER MACHINE AND PROCESS FOR ITS PREHEATING
    DE3205676A1|1982-09-09|Cooled valve seat for inlet and exhaust valves of internal combustion engines
    DE102007027337B4|2009-07-30|Method for producing a cooling channel piston for an internal combustion engine
    EP2093409A2|2009-08-26|Nozzle extension and method for manufacturing same
    DE10015709B4|2011-08-11|Piston with an annular cooling channel
    AT517054B1|2017-02-15|Arrangement of a cylinder head and a fuel injector
    DE102019115418A1|2020-06-10|METHOD FOR PRODUCING AN ENGINE BLOCK
    DE102018113055A1|2018-12-06|CYLINDER HEAD ARRANGEMENT, CYLINDER HEAD AND METHOD
    DE102013016358A1|2014-07-24|Reciprocating piston-internal combustion engine for a motor vehicle, has cylinder housing with cylinder, and screw pipe for partially receiving cylinder head screw for fastening cylinder head to cylinder housing
    EP3252284A1|2017-12-06|Combustion engine comprising two exhaust gas turbochargers
    DE102009045642A1|2010-04-15|Abrasion-resistant piston ring carrier for being embedded in piston of diesel engine, has connection hole connecting oil passage and external chamber, where section of inner, upper and lower wall sections is formed in external chamber
    EP1724446A1|2006-11-22|Valve for an internal combustion engine
    同族专利:
    公开号 | 公开日
    DE112012005045B4|2019-07-18|
    DE112012005045T5|2014-09-18|
    US20130139784A1|2013-06-06|
    WO2013081733A3|2014-03-06|
    US20160097317A1|2016-04-07|
    WO2013081733A2|2013-06-06|
    AT514055B1|2016-02-15|
    US9441528B2|2016-09-13|
    US9217360B2|2015-12-22|
    AT514055A5|2015-03-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR1216885A|1958-03-07|1960-04-28|Built-in prechamber for internal combustion injection engines|
    US3892216A|1973-10-23|1975-07-01|Eaton Corp|Composite article and method of making same|
    US3967013A|1973-10-23|1976-06-29|Eaton Corporation|Method of making a composite article for rapid heating|
    US3985111A|1973-12-17|1976-10-12|Eaton Corporation|Article for defining an auxiliary compartment for an engine combustion chamber|
    FR2413553B1|1978-01-03|1983-01-28|Renault|
    JP2565489B2|1986-03-10|1996-12-18|キヤノン株式会社|Character pattern generator|
    DD275891A1|1988-10-03|1990-02-07|Barkas Werke Veb|INTERNAL COMBUSTION ENGINE WITH A CATALYTICALLY COATED COMBUSTION ENGINE|
    JP2906418B2|1988-10-21|1999-06-21|いすゞ自動車株式会社|Secondary combustion chamber structure|
    JPH03145519A|1989-10-31|1991-06-20|Isuzu Motors Ltd|Temperature control device for engine with heat insulated sub-chamber|
    JP3074721B2|1990-10-19|2000-08-07|いすゞ自動車株式会社|Manufacturing method of adiabatic combustion chamber|
    JP2565489Y2|1991-03-30|1998-03-18|いすゞ自動車株式会社|Sub-chamber insulated engine|
    US5924402A|1997-02-24|1999-07-20|Chrysler Corporation|Pre-combustion chamber for an internal combustion engine|
    US5778849A|1997-05-05|1998-07-14|Chrysler Corporation|Insulated precombustion chamber|
    EP1128034A3|2000-02-22|2003-01-29|Jenbacher Aktiengesellschaft|Fastening sleeve for spark plug|
    US6854439B2|2002-03-02|2005-02-15|Jose Francisco Regueiro|Prechamber combustion system|
    FR2846046B1|2002-10-18|2006-06-16|Peugeot Citroen Automobiles Sa|PRE-CHAMBER IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINE, PRE-CHAMBER IGNITER, AND IGNITION METHOD|
    FR2846042B1|2002-10-18|2005-02-04|Peugeot Citroen Automobiles Sa|PRE-BRAKE IGNITION DEVICE MADE IN HIGH THERMAL CONDUCTIVITY MATERIAL FOR INTERNAL COMBUSTION ENGINE AND PRE-BURST IGNITER|
    JP2007100612A|2005-10-05|2007-04-19|Nissan Motor Co Ltd|Auxiliary chamber type internal combustion engine|
    JP2007138909A|2005-11-23|2007-06-07|Nissan Motor Co Ltd|Pre-combustion chamber type internal-combustion engine|US9476347B2|2010-11-23|2016-10-25|Woodward, Inc.|Controlled spark ignited flame kernel flow in fuel-fed prechambers|
    US8584648B2|2010-11-23|2013-11-19|Woodward, Inc.|Controlled spark ignited flame kernel flow|
    US9172217B2|2010-11-23|2015-10-27|Woodward, Inc.|Pre-chamber spark plug with tubular electrode and method of manufacturing same|
    US8813716B2|2011-06-22|2014-08-26|Caterpillar Motoren Gmbh & Co. Kg|Pre-combustion chamber tip|
    US9038594B2|2011-07-28|2015-05-26|Pratt & Whitney Canada Corp.|Rotary internal combustion engine with pilot subchamber|
    US10557407B2|2011-07-28|2020-02-11|Pratt & Whitney Canada Corp.|Rotary internal combustion engine with pilot subchamber|
    US10041402B2|2016-05-12|2018-08-07|Pratt & Whitney Canada Corp.|Internal combustion engine with split pilot injection|
    US10544732B2|2011-07-28|2020-01-28|Pratt & Whitney Canada Corp.|Rotary internal combustion engine with removable subchamber insert|
    US9528434B1|2011-07-28|2016-12-27|Pratt & Whitney Canada Corp.|Rotary internal combustion engine with pilot subchamber|
    JP6076662B2|2012-09-20|2017-02-08|三菱重工業株式会社|Sub-chamber gas engine|
    US9856848B2|2013-01-08|2018-01-02|Woodward, Inc.|Quiescent chamber hot gas igniter|
    EP3180504B1|2014-08-13|2021-03-17|Woodward, Inc.|Multi-chamber igniter|
    US9765682B2|2013-06-10|2017-09-19|Woodward, Inc.|Multi-chamber igniter|
    AT514813B1|2013-09-25|2015-04-15|Ge Jenbacher Gmbh & Co Og|Arrangement of a cylinder head and a Vorkammersystem|
    JP2015117582A|2013-12-16|2015-06-25|三菱重工業株式会社|Gas engine and assembling method of gas engine|
    KR20160129016A|2014-03-13|2016-11-08|바르실라 핀랜드 오이|Prechamber arrangement, cylinder head and piston engine|
    EP2977582B1|2014-07-22|2018-03-28|Caterpillar Energy Solutions GmbH|Ignition device with pre-combustion chamber|
    US20160039006A1|2014-08-05|2016-02-11|Caterpillar Inc.|Shell and Core Additive Manufacture|
    US9631579B1|2014-08-21|2017-04-25|Charles S. Powers|Seal assemblies and methods for removable precombustion chamber tip|
    US9593622B2|2015-02-09|2017-03-14|Caterpillar Inc.|Combustion system, nozzle for prechamber assembly, and method of making same|
    US20160237879A1|2015-02-16|2016-08-18|Caterpillar Inc.|Fuel Combustion System Having Component with Thermal Conductor Member and Method of Making Same|
    US9653886B2|2015-03-20|2017-05-16|Woodward, Inc.|Cap shielded ignition system|
    CN107636275B|2015-03-20|2019-12-31|伍德沃德有限公司|System and method for igniting an air-fuel mixture in an internal combustion engine|
    US9617908B2|2015-05-11|2017-04-11|Caterpillar Inc.|Fuel combustion system, nozzle for prechamber assembly having coolant passage, and method of making same|
    US20160348570A1|2015-05-26|2016-12-01|Caterpillar Inc.|Fuel Combustion System, Nozzle for Prechamber Assembly Having Coolant Passage in Communication with Orifice Passage, and Method of Making Same|
    DE102015113175A1|2015-08-10|2016-09-29|Federal-Mogul Ignition Gmbh|spark plug|
    US20190301351A1|2015-08-24|2019-10-03|Akela Industries Inc.|Pre-combustion chamber apparatus and method for pre-combustion|
    US10066580B2|2015-10-15|2018-09-04|The Regents Of The University Of Michigan|Lean burn internal combustion engine|
    US9890689B2|2015-10-29|2018-02-13|Woodward, Inc.|Gaseous fuel combustion|
    GB2545417A|2015-12-14|2017-06-21|Caterpillar Energy Solutions Gmbh|Prechamber assembly for internal combustion engine|
    EP3181854A1|2015-12-14|2017-06-21|Caterpillar Energy Solutions GmbH|Pre-chamber of internal combustion engine|
    US10662865B2|2016-08-31|2020-05-26|Caterpillar Inc.|Method of remanufacturing a prechamber assembly|
    US10641159B2|2016-09-23|2020-05-05|Caterpillar Inc.|Pre-chamber assembly for fuel injector|
    US10273869B2|2016-10-14|2019-04-30|Caterpillar Inc.|Prechamber ignition device for internal combustion engine, and method|
    WO2018087418A1|2016-11-14|2018-05-17|Wärtsilä Finland Oy|Prechamber component and method of manufacturing same|
    CN106870117B|2017-01-23|2019-06-04|江苏盛源燃气动力机械有限公司|Water-cooled pre-burning device|
    US10724423B2|2017-02-16|2020-07-28|Caterpillar Inc.|Vented pre-chamber assembly for an engine|
    DE102017215493A1|2017-09-04|2019-03-07|Man Diesel & Turbo Se|Meran seemed fine|
    US10145291B1|2017-10-10|2018-12-04|Pratt & Whitney Canada Corp.|Rotary engine and method of combusting fuel|
    US10801394B2|2017-11-29|2020-10-13|Pratt & Whitney Canada Corp.|Rotary engine with pilot subchambers|
    DE102017129056B4|2017-12-06|2019-12-19|Federal-Mogul Ignition Gmbh|Spark plug with a fuel supply channel|
    EP3521585A1|2018-02-01|2019-08-07|Innio Jenbacher GmbH & Co OG|Prechamber device for combustion engine|
    EP3536922A1|2018-03-05|2019-09-11|Innio Jenbacher GmbH & Co OG|Prechamber device for combustion engine|
    JP2019194452A|2018-05-02|2019-11-07|マツダ株式会社|Control device for compression ignition type engine|
    JP2020084869A|2018-11-22|2020-06-04|トヨタ自動車株式会社|Internal combustion engine with auxiliary chamber|
    US11268434B1|2020-08-20|2022-03-08|Saudi Arabian Oil Company|Method and system for extending dilution limit of a prechamber spark ignition engine|
    法律状态:
    2018-06-15| MM01| Lapse because of not paying annual fees|Effective date: 20171016 |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/309,045|US9217360B2|2011-12-01|2011-12-01|Prechamber device for internal combustion engine|
    PCT/US2012/060461|WO2013081733A2|2011-12-01|2012-10-16|Prechamber device for internal combustion engine|
    [返回顶部]