Pre-combustion chamber positioning gasket and engine

Abstract

The present invention discloses a positioning gasket for a pre-combustion chamber and an engine. The positioning gasket for the pre-combustion chamber comprises: a gasket body; a first positioning portion, which is arranged on the outer periphery of the gasket body and protrudes radially along the gasket body; and a second positioning portion, which is arranged at one end of the gasket body and protrudes axially along the gasket body. Thus, by positioning the first positioning portion and the second positioning portion on the gasket body respectively with the inner side wall of the mounting hole where the pre-combustion chamber is arranged and the pre-combustion chamber, the structural design of the positioning gasket for the pre-combustion chamber can be simplified, and the structural reliability of the positioning gasket for the pre-combustion chamber can be improved, while ensuring that the positioning and matching are stable and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of engines, in particular to a positioning gasket of a pre-combustion chamber and an engine. Background Art

[0002] In order to further improve the thermal efficiency of the engine and meet regulatory and emission requirements, the application of pre-combustion chamber technology in the engine came into being. Among them, since the structural space inside the engine cylinder head is relatively compact and the spatial position of the flame injection on the pre-combustion chamber is relatively important, how to ensure the successful implementation of the pre-combustion chamber on the engine and ensure its installation consistency in the cylinder head combustion chamber has become a top priority in the development of engine technology.

[0003] In the prior art, a flame injection hole symmetrically arranged along the center is designed at the bottom of the precombustion chamber, and the cavity above the hole is the precombustion chamber. An internal thread is provided on the inner wall of the upper part of the precombustion chamber, and the internal thread is connected to the spark plug. The precombustion chamber is arranged in the mounting hole of the cylinder head, and an external thread is provided on the outer wall of the precombustion chamber, and the external thread is connected to the inner wall of the mounting hole of the cylinder head. The threaded cooperation between the precombustion chamber and the cylinder head cannot ensure the fixity of the position of the precombustion chamber injection hole, that is, the angle requirement of the precombustion chamber flame injection hole cannot be met, which will reduce the precombustion efficiency of the precombustion chamber. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a positioning gasket for a pre-combustion chamber, which has a simple structure and stable and reliable positioning.

[0005] The present invention further provides an engine.

[0006] The positioning gasket for the pre-combustion chamber according to the present invention comprises: a gasket body; a first positioning portion, which is arranged on the outer periphery of the gasket body and protrudes radially along the gasket body; and a second positioning portion, which is arranged at one end of the gasket body and protrudes axially along the gasket body.

[0007] Therefore, by respectively cooperating the first positioning portion and the second positioning portion on the gasket body with the inner wall of the mounting hole where the precombustion chamber is set and the positioning of the precombustion chamber, the structural design of the positioning gasket of the precombustion chamber can be simplified while ensuring that the positioning cooperation is stable and reliable, and the structural reliability of the positioning gasket of the precombustion chamber can be improved.

[0008] In some examples of the present invention, the gasket body is a hollow ring shape, the first positioning portion is an arc-shaped positioning protrusion, or the first positioning portion is a first cylindrical positioning pin; the second positioning portion is a rectangular positioning protrusion, or the second positioning portion is a second cylindrical positioning pin.

[0009] In some examples of the present invention, the radial plane where the center of the first positioning portion is located coincides with the radial plane where the center of the second positioning portion is located, and / or there is an angle between the radial plane where the center of the first positioning portion is located and the radial plane where the center of the second positioning portion is located.

[0010] The engine according to the present invention comprises: a cylinder head, which is provided with a mounting hole; a pre-combustion chamber, which is press-fitted into the mounting hole; a spark plug, which is connected to the pre-combustion chamber; and the positioning gasket for the pre-combustion chamber mentioned above, wherein the gasket body is arranged in the mounting hole and is located above the pre-combustion chamber, the first positioning portion is positioned and matched with the mounting hole, and the second positioning portion is positioned and matched with the pre-combustion chamber.

[0011] In some examples of the present invention, a first positioning groove is provided on the inner side wall of the mounting hole, a second positioning groove is provided on the pre-combustion chamber, the first positioning portion and the first positioning groove are positioned and matched, and the second positioning portion and the second positioning groove are positioned and matched.

[0012] In some examples of the present invention, the pre-combustion chamber includes: a main body and a head, the head is connected to the top of the main body, a first limiting step is formed at the connection between the head and the main body, a second limiting step is formed in the mounting hole, and the first limiting step is limitedly matched with the second limiting step.

[0013] In some examples of the present invention, the engine further includes: a sealing gasket, which is sleeved on the main body and cushioned between the first limiting step and the second limiting step.

[0014] In some examples of the present invention, the positioning gasket of the pre-combustion chamber is arranged above the head, the second positioning portion is not protruded from the inner circumferential wall of the head, and the first positioning portion is equal to the thickness of the gasket body.

[0015] In some examples of the present invention, the engine further comprises: a locking member, wherein the locking member is disposed above the positioning gasket of the pre-combustion chamber, and the locking member is lockingly matched with the inner peripheral wall of the mounting hole.

[0016] In some examples of the present invention, the pre-combustion chamber is transitionally matched with the mounting hole.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a partial schematic diagram of an engine according to an embodiment of the present invention;

[0020] Figure 2 is a partial schematic diagram of a pre-combustion chamber according to an embodiment of the present invention;

[0021] Figure 3 is a partial schematic diagram of an engine according to an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of a positioning gasket of a pre-combustion chamber according to an embodiment of the present invention;

[0023] Figure 5 It is a schematic diagram of a positioning gasket of a pre-combustion chamber according to another embodiment of the present invention.

[0024] Reference numerals:

[0025] 100 - engine;

[0026] 10-cylinder head; 11-mounting hole; 111-second limiting step; 112-first positioning groove;

[0027] 20-pre-combustion chamber; 21-main body; 22-head; 23-first limiting step; 24-sealing pad; 25-second positioning groove;

[0028] 30-spark plug;

[0029] 41 - positioning gasket; 411 - gasket body; 412 - first positioning portion; 413 - second positioning portion; 42 - locking member. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0031] Reference below Figure 1-Figure 5 The positioning gasket 41 of the pre-combustion chamber 20 according to the embodiment of the present invention is described, and the positioning gasket 41 of the pre-combustion chamber 20 can be applied to the engine 100.

[0032] like Figure 2-Figure 5As shown, the positioning gasket 41 of the precombustion chamber 20 according to an embodiment of the present invention may mainly include: a gasket body 411, a first positioning portion 412 and a second positioning portion 413, wherein the first positioning portion 412 is arranged on the outer periphery of the gasket body 411, and is radially protruded toward the gasket body 411 to be positioned and matched with the inner side wall of the mounting hole 11 in which the precombustion chamber 20 is set, and the second positioning portion 413 is arranged at one end of the gasket body 411, and is axially protruded toward the gasket body 411 to be positioned and matched with the precombustion chamber 20. In this way, the structural design of the positioning gasket 41 of the precombustion chamber 20 can be simplified while ensuring that the positioning gasket 41 of the precombustion chamber 20 respectively and the inner side wall of the mounting hole 11 in which the precombustion chamber 20 is set and the positioning of the precombustion chamber 20 are stably and reliably matched, thereby optimizing the structural design of the positioning gasket 41 of the precombustion chamber 20.

[0033] Therefore, by positioning the first positioning portion 412 and the second positioning portion 413 on the gasket body 411 respectively with the inner wall of the mounting hole 11 in which the precombustion chamber 20 is set and the precombustion chamber 20, the structural design of the positioning gasket 41 of the precombustion chamber 20 can be simplified while ensuring that the positioning is stable and reliable, and the structural reliability of the positioning gasket 41 of the precombustion chamber 20 can be improved.

[0034] Combination Figure 4 and Figure 5 As shown, the gasket body 411 is in a hollow ring shape, the first positioning portion 412 is an arc-shaped positioning protrusion, or the first positioning portion 412 is a first cylindrical positioning pin, and the second positioning portion 413 is a rectangular positioning protrusion, or the second positioning portion 413 is a second cylindrical positioning pin. Specifically, setting the first positioning portion 412 as an arc-shaped positioning protrusion can not only ensure the positioning reliability of the first positioning portion 412, but also prevent the first positioning portion 412 from affecting the installation and setting of the components located on the upper and lower sides of the gasket body 411, so that the structural design of the positioning gasket 41 of the pre-combustion chamber 20 can be optimized. In addition, the first positioning portion 412 can also be a first cylindrical positioning pin, and the shape of the first positioning portion 412 can be selectively set according to specific process requirements, so as to improve the applicability of the first positioning portion 412.

[0035] Furthermore, the second positioning portion 413 is configured as a rectangular positioning protrusion or a second cylindrical positioning pin, which can not only ensure the stability and reliability of the positioning of the second positioning portion 413 but also improve the applicability of the second positioning portion 413 .

[0036] Combination Figure 4 and Figure 5As shown, the radial plane where the center of the first positioning portion 412 is located coincides with the radial plane where the center of the second positioning portion 413 is located, and / or there is an angle between the radial plane where the center of the first positioning portion 412 is located and the radial plane where the center of the second positioning portion 413 is located. By so configuring, the difficulty of configuring the first positioning portion 412 and the second positioning portion 413 on the gasket body 411 can be reduced while ensuring that the first positioning portion 412 and the second positioning portion 413 are respectively stably and reliably matched with the inner wall of the mounting hole 11 where the precombustion chamber 20 is set and the positioning of the precombustion chamber 20, thereby simplifying the configuration process of the positioning gasket 41 of the precombustion chamber 20.

[0037] Combination Figure 1 As shown, the engine 100 according to the embodiment of the present invention may mainly include: a cylinder head 10, a pre-combustion chamber 20, a spark plug 30 and a positioning gasket 41 of the pre-combustion chamber 20, a mounting hole 11 is provided in the cylinder head 10, the pre-combustion chamber 20 is press-fitted in the mounting hole 11, the spark plug 30 is provided in the pre-combustion chamber 20, the positioning gasket 41 of the pre-combustion chamber 20 is fixed in the mounting hole 11 and is located above the pre-combustion chamber 20, and the positioning gasket 41 of the pre-combustion chamber 20 is respectively positioned and matched with the mounting hole 11 and the pre-combustion chamber 20. Specifically, the spark plug 30 is provided in the pre-combustion chamber 20, and the spark plug 30 can ignite the pre-combustion of the pre-combustion chamber 20, thereby promoting the pre-combustion and improving the efficiency of the pre-combustion. Furthermore, the precombustion chamber 20 is pressed into the mounting hole 11. Such an arrangement can, on the one hand, ensure the stability and firmness of the installation of the precombustion chamber 20 in the mounting hole 11, prevent the precombustion chamber 20 from being loosened and suffering from thermal fatigue when being impacted by the high-temperature and high-pressure gas in the cylinder head 10, and ensure the sealing stability between the precombustion chamber 20 and the cylinder head 10. On the other hand, it can also make the installation of the precombustion chamber 20 in the mounting hole 11 simpler and more direct, thereby improving the efficiency of the assembly and production of the engine 100.

[0038] In addition, with such an arrangement, after the precombustion chamber 20 is arranged in the mounting hole 11, there is no need to leave a disassembly space in the mounting hole 11 to facilitate the disassembly of the precombustion chamber 20, which can make the structure of the mounting hole 11 more compact. Compared with the traditional engine in which the precombustion chamber is installed by threaded fitting, with such an arrangement, the size of the mounting hole 11 can be reduced, so that the space of the cooling water jacket in the cylinder head 10 can be increased while the size of the cylinder head 10 remains unchanged, thereby improving the cooling effect of the cylinder head 10, and further improving the performance of the engine 100, for example: the combustion of the engine 100 can be made more complete, the emission of the engine 100 can be made better, the knock problem can be reduced, and the thermal deformation of the cylinder head 10 and the reduction of the sealing performance of the cylinder head 10 can be prevented.

[0039] In addition, during the process of installing the precombustion chamber 20 in the mounting hole 11, the positioning gasket 41 of the precombustion chamber 20 in the mounting hole 11 is positioned and matched with the precombustion chamber 20. This can not only increase the speed at which the precombustion chamber 20 is installed in the mounting hole 11 and improve the efficiency of the assembly and production of the engine 100, but also accurately fix the position of the precombustion chamber 20 in the mounting hole 11, thereby meeting the angle requirements of the flame nozzle of the precombustion chamber 20, thereby improving the combustion efficiency of the precombustion chamber 20.

[0040] Therefore, by pressing the precombustion chamber 20 into the mounting hole 11, and positioning the positioning gasket 41 of the precombustion chamber 20 in the mounting hole 11 and cooperating with the precombustion chamber 20, not only can the installation of the precombustion chamber 20 in the mounting hole 11 be simple and direct, the structure of the precombustion chamber 20 and the mounting hole 11 can be made more compact, but also the accuracy and reliability of the position of the precombustion chamber 20 in the mounting hole 11 can be improved.

[0041] Combination Figure 2-Figure 5 As shown, a first positioning groove 112 is provided on the inner side wall of the mounting hole 11, a second positioning groove 25 is provided on the pre-combustion chamber 20, the first positioning portion 412 is positioned and matched with the first positioning groove 112, and the second positioning portion 413 is positioned and matched with the second positioning groove 25. Specifically, the first positioning portion 412 is directly extended into the first positioning groove 112. When the first positioning portion 412 is an arc-shaped positioning protrusion or a first cylindrical positioning protrusion, the first positioning groove 112 can be set to a shape that matches the arc-shaped positioning protrusion or the first cylindrical positioning protrusion, thereby ensuring the stability and reliability of the positioning and matching between the first positioning groove 112 and the first positioning portion 412.

[0042] Furthermore, the second positioning portion 413 is directly extended into the second positioning groove 25. When the second positioning portion 413 is a rectangular positioning protrusion or a second cylindrical positioning protrusion, the second positioning groove 25 can be set to a shape that is compatible with the rectangular positioning protrusion or the second cylindrical positioning protrusion, thereby ensuring the stability and reliability of the positioning cooperation between the second positioning groove 25 and the second positioning portion 413.

[0043] Combination Figure 2As shown, the pre-combustion chamber 20 may mainly include: a main body 21 and a head 22, the head 22 is connected to the top of the main body 21, a first limiting step 23 is formed at the connection between the head 22 and the main body 21, a second limiting step 111 is formed in the mounting hole 11, and the first limiting step 23 is limitedly matched with the second limiting step 111. Specifically, the diameter of the main body 21 is designed to be smaller than the diameter of the head 22, so that the first limiting step 23 can be formed at the connection between the head 22 and the main body 21, and the second limiting step 111 is arranged at the position of the mounting hole 11 corresponding to the first limiting step 23. After the pre-combustion chamber 20 is arranged in the mounting hole 11, the first limiting step 23 can be limitedly matched with the second limiting step 111, so that the axial movement of the pre-combustion chamber 20 relative to the mounting hole 11 can be limited, so that the pre-combustion chamber 20 can be stably and firmly installed in the mounting hole 11, and the reliability of the engine 100 can be improved.

[0044] Combination Figure 1 and Figure 2 As shown, the engine 100 may also mainly include: a sealing gasket 24, which is sleeved on the main body 21 and is padded between the first limiting step 23 and the second limiting step 111. Specifically, due to the limitations of materials and processing technology, there will inevitably be a gap between the first limiting step 23 and the second limiting step 111. Therefore, by arranging the sealing gasket 24 between the first limiting step 23 and the second limiting step 111, the sealing gasket 24 can seal the gap between the first limiting step 23 and the second limiting step 111, thereby ensuring the airtightness of the mutual cooperation between the first limiting step 23 and the second limiting step 111, and preventing tiny high-pressure gas from leaking from the gap between the first limiting step 23 and the second limiting step 111, reducing the combustion efficiency of the pre-combustion chamber 20, and even causing the failure of the engine 100, so that the reliability of the engine 100 can be improved. It should be noted that the sealing gasket 24 is an elastic sealing gasket, and the sealing gasket 24 includes at least one of a rubber sealing gasket, a silicone sealing gasket and a latex sealing gasket, which is not limited here.

[0045] Combination Figure 4 and Figure 5As shown, the positioning gasket 41 of the pre-combustion chamber 20 is arranged above the head 22, the second positioning portion 413 does not protrude from the inner peripheral wall of the head 22, and the first positioning portion 412 is equal to the thickness of the gasket body 411. Specifically, the positioning gasket 41 of the pre-combustion chamber 20 is arranged above the head 22 of the pre-combustion chamber 20, and the second positioning portion 413 and the second positioning groove 25 of the head 22 of the pre-combustion chamber 20 are positioned and matched with each other, and the second positioning portion 413 does not protrude from the inner peripheral wall of the head 22. In this way, the second positioning portion 413 can be prevented from occupying the space inside the pre-combustion chamber 20 and affecting the normal operation of the pre-combustion chamber 20, while ensuring that the positioning and matching between the second positioning portion 413 and the second positioning groove 25 are stable and reliable.

[0046] Furthermore, the thickness of the first positioning portion 412 is set to be equal to the thickness of the gasket body 411, which can prevent the first positioning portion 412 from protruding from the gasket body 411, thereby preventing the first positioning portion 412 from protruding from the gasket body 411 and affecting the arrangement of other components above or below the positioning gasket 41 of the pre-combustion chamber 20. This can make the structural design of the positioning gasket 41 of the pre-combustion chamber 20 more reasonable.

[0047] Combination Figure 1-Figure 5 As shown, the engine 100 may also mainly include: a locking member 42, a positioning gasket 41 of the precombustion chamber 20 is positioned and matched with the cylinder head 10, and is positioned and matched with the precombustion chamber 20, the locking member 42 is arranged above the positioning gasket 41 of the precombustion chamber 20, and the locking member 42 is locked and matched with the inner peripheral wall of the mounting hole 11. Specifically, by positioning the positioning gasket 41 of the precombustion chamber 20 with the cylinder head 10 and the precombustion chamber 20, the precombustion chamber 20 can be quickly and directly placed in the correct position relative to the cylinder head 10, which not only facilitates the installation of the precombustion chamber 20 in the mounting hole 11, but also improves the efficiency of the assembly and production of the engine 100, and also meets the angle requirements of the flame nozzle of the precombustion chamber 20, thereby improving the combustion efficiency of the precombustion chamber 20.

[0048] Furthermore, the locking member 42 is arranged above the positioning gasket 41 of the pre-combustion chamber 20. When the locking member 42 is locked with respect to the inner peripheral wall of the mounting hole 11, the locking member 42 can apply downward pressure to the pre-combustion chamber 20, thereby further improving the firmness of the pre-combustion chamber 20 pressed in the mounting hole 11. In addition, with such an arrangement, when the high-temperature and high-pressure gas impacts the pre-combustion chamber 20, due to the locking effect of the locking member 42, the pre-combustion chamber 20 will not easily produce thermal fatigue, which can further ensure the stability of the pre-combustion chamber 20 in the mounting hole 11, thereby improving the reliability of the engine 100.

[0049] It should be noted that the positioning gasket 41 of the precombustion chamber can also be an elastic positioning gasket. The positioning gasket 41 of the precombustion chamber 20 includes at least one of a rubber positioning gasket, a silicone positioning gasket and a latex positioning gasket, which is not limited here. In this way, while the positioning gasket 41 of the precombustion chamber 20 plays a positioning role, the positioning gasket 41 of the precombustion chamber 20 can buffer the locking effect of the locking piece 42 on the precombustion chamber 20, thereby preventing the mutual extrusion between the precombustion chamber 20 and the locking piece 42 from damaging the structure of the precombustion chamber 20 and the locking piece 42, thereby further improving the structural reliability of the engine 100.

[0050] Furthermore, the pre-combustion chamber 20 is transitionally matched with the mounting hole 11, which can prevent the pre-combustion chamber 20 from tilting sideways during the process of being pressed into the mounting hole 11, thereby preventing the pre-combustion chamber 20 from causing installation failure of the pre-combustion chamber 20. This can further improve the stability and reliability of the pre-combustion chamber 20 installed in the mounting hole 11.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "height", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0053] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An engine, characterized in that: include: A cylinder head, wherein the cylinder head is provided with a mounting hole; a pre-combustion chamber, the pre-combustion chamber being press-fitted into the mounting hole; a spark plug connected to the pre-combustion chamber; The positioning gasket of the pre-combustion chamber comprises a gasket body, and the gasket body is arranged in the mounting hole and located above the pre-combustion chamber; A first positioning portion, the first positioning portion is arranged on the outer periphery of the gasket body and protrudes in the radial direction of the gasket body, and the first positioning portion is positioned and matched with the mounting hole; A second positioning portion, the second positioning portion is arranged at one end of the gasket body and protrudes along the axial direction of the gasket body, and the second positioning portion is positioned and matched with the pre-combustion chamber; The positioning gasket of the pre-combustion chamber includes at least one of a rubber positioning gasket, a silicone positioning gasket, a latex positioning gasket and an elastic positioning gasket.

2. The engine according to claim 1, characterized in that The gasket body is in a hollow ring shape, the first positioning portion is an arc-shaped positioning protrusion, or the first positioning portion is a first cylindrical positioning pin; The second positioning portion is a rectangular positioning protrusion, or the second positioning portion is a second cylindrical positioning pin.

3. The engine according to claim 2, characterized in that The radial plane where the center of the first positioning portion is located coincides with the radial plane where the center of the second positioning portion is located, and / or there is an angle between the radial plane where the center of the first positioning portion is located and the radial plane where the center of the second positioning portion is located.

4. The engine according to claim 1, characterized in that A first positioning groove is formed on the inner side wall of the mounting hole, a second positioning groove is formed on the pre-combustion chamber, the first positioning portion and the first positioning groove are positioned and matched, and the second positioning portion and the second positioning groove are positioned and matched.

5. The engine according to claim 1, characterized in that The pre-combustion chamber includes: a main body and a head, the head is connected to the top of the main body, a first limiting step is formed at the connection between the head and the main body, a second limiting step is formed in the mounting hole, and the first limiting step is limitedly matched with the second limiting step.

6. The engine according to claim 5, characterized in that Also includes: A sealing gasket is sleeved on the main body and cushioned between the first limiting step and the second limiting step.

7. The engine according to claim 5, characterized in that The positioning gasket of the pre-combustion chamber is arranged above the head, the second positioning portion is not protruded from the inner peripheral wall of the head, and the first positioning portion is equal to the thickness of the gasket body.

8. The engine according to claim 1, characterized in that Also includes: A locking piece is arranged above the positioning gasket of the pre-combustion chamber, and the locking piece is locked and matched with the inner peripheral wall of the mounting hole.

9. The engine according to claim 1, characterized in that The pre-combustion chamber is transitionally matched with the mounting hole.

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