Precombustion chamber and vehicle having the same

Abstract

The present invention discloses a precombustion chamber and a vehicle having the same, wherein the precombustion chamber comprises a shell, a precombustion chamber is formed in the shell, a plug-in hole connected to the precombustion chamber and suitable for inserting the spark plug is formed on the shell, and a flame-spraying hole connected to the precombustion chamber is also formed on the shell, wherein the wall thickness of the precombustion chamber is greater than or equal to 10% of the diameter of the plug-in hole. According to the precombustion chamber of the present invention, by setting the wall thickness of the precombustion chamber to be greater than or equal to 10% of the diameter of the plug-in hole, the shell of the precombustion chamber has a certain strength, and the loss of heat dissipation energy of the shell structure can be effectively reduced, the temperature and energy of the flame flow can be effectively maintained, and the high-energy flame flow of the precombustion chamber can effectively ignite the mixed gas in the main combustion chamber, so that the mixed gas in the main combustion chamber is fully burned, the economy of the engine is improved, and the emission of the engine is improved at the same time.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a pre-combustion chamber and a vehicle having the same. Background Art

[0002] Relevant technologies point out that gasoline engines rely on spark plugs to ignite the oil-gas mixture in the cylinder, which outputs power and torque after complete combustion. In traditional gasoline engines, a spark plug mounting hole is arranged on the upper part of the combustion chamber on the cylinder head. The spark plug electrode generates an electric spark to ignite the mixed oil and gas in the cylinder. However, the spark plug has limited ignition capability, which can easily lead to incomplete combustion of the mixture.

[0003] Modern high thermal efficiency engines often use a new type of ignition device, which adds a new pre-combustion chamber, or a pre-combustion chamber spark plug, based on the cylinder head combustion chamber. The spark plug first ignites the oil and gas in the pre-combustion chamber to form a flame flow, and the flame flow ignites the mixture in the main combustion chamber through the spray hole of the pre-combustion chamber, thereby increasing the combustion speed.

[0004] The pre-combustion chamber shell structure design in the existing pre-combustion chamber arrangement is unreasonable. During cold start, the shell structure dissipates a large amount of heat and causes a large energy loss. At the same time, the flame flow temperature drops too quickly and misfires are likely to occur. The high-energy flame flow in the pre-combustion chamber cannot be fully and effectively utilized. The flame flow is sprayed to the main combustion chamber through the nozzle hole. The flame energy is low and the utilization rate of the flame flow is low, which is not conducive to the full combustion of the mixture in the cylinder head combustion chamber and has low combustion efficiency. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention is to propose a pre-combustion chamber, which can effectively reduce the heat dissipation energy loss of the shell structure while ensuring that the shell of the pre-combustion chamber has a certain strength, so that the high-energy flame flow of the pre-combustion chamber can effectively ignite the mixed gas in the main combustion chamber.

[0006] The present invention also provides a vehicle having the pre-combustion chamber.

[0007] The pre-combustion chamber according to the first aspect of the present invention comprises a shell, a pre-combustion chamber is formed in the shell, an insertion hole connected to the pre-combustion chamber and suitable for inserting the spark plug is formed on the shell, and a flame injection hole connected to the pre-combustion chamber is also formed on the shell, wherein the wall thickness of the pre-combustion chamber is greater than or equal to 10% of the diameter of the insertion hole.

[0008] According to the precombustion chamber of the present invention, by setting the wall thickness of the precombustion chamber to be greater than or equal to 10% of the diameter of the insertion hole, the shell of the precombustion chamber has a certain strength, and can also effectively reduce the loss of heat dissipation energy of the shell structure, effectively maintain the temperature and energy of the flame flow, so that the high-energy flame flow of the precombustion chamber can effectively ignite the mixture in the main combustion chamber, so that the mixture in the main combustion chamber can be fully burned, thereby improving the economy of the engine and improving the emission of the engine.

[0009] In some embodiments, the housing includes a first ring portion, a second ring portion, and a third ring portion sequentially connected in a direction from the insertion hole to the flame injection hole, and the electrode portion of the spark plug is suitable for extending into the inner side of the first ring portion.

[0010] In some embodiments, in the axial direction of the first ring portion, the first ring portion extends along a straight line, and a thickness of the first ring portion in a radial direction is less than or equal to 40% of a diameter of the insertion hole.

[0011] In some embodiments, the second ring portion is formed into a conical ring shape in the axial direction of the second ring portion, and the outer contour size of the cross-section of the second ring portion gradually decreases in the direction from the first ring portion toward the third ring portion along the axis.

[0012] In some embodiments, in a direction along the axis from the first ring portion toward the third ring portion, a thickness of the second ring portion in a radial direction gradually increases.

[0013] In some embodiments, the thickness in the radial direction of the end of the second ring portion close to the first ring portion is less than or equal to 1.5 times the radial thickness of the first ring portion; and / or the thickness of the other end of the second ring portion away from the first ring portion is less than or equal to 2 times the radial thickness of the first ring portion.

[0014] In some embodiments, in the axial direction of the third ring portion, the third ring portion extends in a straight line, and a thickness of the third ring portion in a radial direction is greater than or equal to 15% and less than or equal to 50% of the diameter of the insertion hole.

[0015] In some embodiments, the radial thickness of the third ring portion is greater than or equal to 1.5 times the radial thickness of the first ring portion and less than or equal to 3 times the radial thickness of the first ring portion.

[0016] In some embodiments, the shell also includes a spherical portion connected to one end of the third ring portion facing away from the second ring portion, the spherical portion is formed as a spherical structure protruding outward away from the third ring portion, and the radial thickness of the spherical portion is in the range of 0.8 times to 1.5 times the radial thickness of the third ring portion.

[0017] A vehicle according to a second aspect of the present invention comprises a pre-combustion chamber according to the first aspect of the present invention.

[0018] According to the vehicle of the present invention, the pre-combustion chamber of the first aspect is provided, thereby improving the overall performance of the vehicle.

[0019] 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

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 is a schematic diagram of a pre-combustion chamber according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 An enlarged view of A shown in FIG.

[0023] Reference numerals:

[0024] Pre-combustion chamber 100;

[0025] Shell 10, pre-combustion chamber 101, insertion hole 110, flame-spraying hole 120, first ring portion 130, second ring portion 140, third ring portion 150, spherical portion 160;

[0026] Spark plug 20 , electrode portion 210 . DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "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.

[0030] Reference below Figure 1 and Figure 2 A pre-combustion chamber 100 according to an embodiment of a first aspect of the present invention is described.

[0031] Specifically, Figure 1 As shown, according to the pre-combustion chamber 100 of the first embodiment of the present invention, the pre-combustion chamber 100 is used for the spark plug 20 of the engine to extend into the pre-combustion chamber 100 for ignition, wherein the spark plug 20 is commonly known as a nozzle. The function of the spark plug 20 is to discharge the pulse high voltage electricity sent by the high-voltage wire, break through the air in the electrode part 210 of the spark plug 20, generate electric sparks to ignite the mixed gas in the pre-combustion chamber 101.

[0032] The pre-combustion chamber 100 is arranged in the cylinder head combustion chamber, and is continuously subjected to thermal stress inside and outside. The material of the pre-combustion chamber 100 is required to have high strength, good thermal conductivity or small thermal expansion performance. Preferred materials are: iron material, steel material, copper material, silicon material, manganese material and alloy materials containing the above elements.

[0033] The pre-combustion chamber 100 includes a shell 10, in which a pre-combustion chamber 101 is formed. The pre-combustion chamber 101 provides a place for the spark plug 20 to ignite. The shell 10 is formed with a plug-in hole 110 that is connected to the pre-combustion chamber 101 and suitable for the spark plug 20 to be inserted. In a specific embodiment, the spark plug 20 is connected to the plug-in hole 110 by a thread. The connecting position of the spark plug 20 is provided with an external thread, and the corresponding position of the plug-in hole 110 is provided with an internal thread that matches the external thread of the spark plug 20. The threaded connection between the plug-in hole 110 and the spark plug 20 ensures that the flammable mixture in the pre-combustion chamber 100 will not flow to the upper part of the pre-combustion chamber 100 (for example, Figure 1 At the same time, it also ensures that the flame flow after the mixed gas in the pre-combustion chamber 100 is ignited will not leak to the top of the pre-combustion chamber 100, causing unnecessary safety hazards.

[0034] The shell 10 is also provided with a flame hole 120 connected to the pre-combustion chamber 101 . The flame hole 120 is used to discharge the flame flow in the pre-combustion chamber 100 , while the fresh oil-gas mixture in the main combustion chamber enters the pre-combustion chamber 101 through the flame hole 120 .

[0035] Among them, Figure 2 As shown, the wall thickness of the pre-combustion chamber 101 (eg Figure 2 a) shown in FIG. is greater than or equal to the diameter of the insertion hole 110 (eg Figure 2 That is to say, the wall thickness of the pre-combustion chamber 101 is a, and the diameter of the insertion hole 110 is b, then the value of a / b should be greater than or equal to 10%. In this way, while the pre-combustion chamber 100 effectively reduces the loss of heat dissipation energy of the shell 10 structure, it also ensures that the shell 10 of the pre-combustion chamber 100 has a certain strength to resist the force generated instantly when the mixture in the main combustion chamber burns.

[0036] In specific implementation, the wall thickness of the precombustion chamber 100 can be set to 15%, 20% and 25% of the diameter of the insertion hole 110 according to actual conditions, thereby ensuring the strength of the shell 10 of the precombustion chamber 100, reducing the possibility of damage to the shell 10, and reducing the loss of heat dissipation energy of the shell 10 structure.

[0037] According to the precombustion chamber 100 of the embodiment of the present invention, by setting the wall thickness of the precombustion cavity 101 to be greater than or equal to 10% of the diameter of the insertion hole 110, the shell 10 of the precombustion chamber 100 has a certain strength, and can also effectively reduce the loss of heat dissipation energy of the shell 10 structure, effectively maintain the temperature and energy of the flame flow, so that the high-energy flame flow of the precombustion chamber 100 can effectively ignite the mixture in the main combustion chamber, so that the mixture in the main combustion chamber is fully burned, thereby improving the economy of the engine and improving the emission performance of the engine.

[0038] In one embodiment of the present invention, Figure 1 As shown, the housing 10 includes a direction from the insertion hole 110 to the flame-spraying hole 120 (eg Figure 1 In the embodiment of the present invention, the first ring portion 130, the second ring portion 140 and the third ring portion 150 are sequentially connected (from top to bottom in the direction of the pre-combustion chamber 100). In this way, the shell 10 of the pre-combustion chamber 100 is provided with three different ring portions connected to each other, which is conducive to the mixed gas flowing in the pre-combustion chamber 101 and then filling the pre-combustion chamber 101. The electrode portion 210 of the spark plug 20 is suitable for extending into the inner side of the first ring portion 130, which is conducive to the full contact between the electrode portion 210 of the spark plug 20 and the mixed gas in the pre-combustion chamber 101, and then conducive to the full combustion of the mixed gas in the pre-combustion chamber 101.

[0039] In one embodiment of the present invention, Figure 1As shown, in the axial direction of the first ring portion 130 (eg Figure 1 In the direction from top to bottom in the middle, the first ring portion 130 extends in a straight line, which is convenient for the installation of the spark plug 20 and the installation of the pre-combustion chamber 100 on the cylinder head. At the same time, it can maximize the contact area between the spark plug 20 and the pre-combustion chamber 101, and the contact area between the pre-combustion chamber 100 and the cylinder head, which is beneficial to the cooling of the first straight portion.

[0040] Furthermore, the thickness of the first ring portion 130 in the radial direction (eg Figure 2 c) shown in the figure is less than or equal to 40% of the diameter of the insertion hole 110, that is, the thickness of the first ring portion 130 in the radial direction is c, and the diameter of the insertion hole 110 is b, then the value of c / b should be less than or equal to 40%. In the specific implementation process, the thickness of the first ring portion 130 in the radial direction can be set to 10%, 20%, 30% and 40% of the diameter of the insertion hole 110 according to actual conditions. In this way, the heat transferred from the pre-combustion chamber 100 to the cylinder head body by the first ring portion 130 is effectively limited, and it can be prevented that during cold start, the first ring portion 130 transfers excessive heat to the cylinder head, resulting in the phenomenon that the temperature of the pre-combustion chamber 101 is too low and the flame flow is extinguished. At the same time, when the pre-combustion chamber 100 is working normally, the temperature of the inner wall of the first ring portion 130 can be made closer to the temperature of the outer wall of the cylinder head body, thereby reducing the temperature of the surrounding oil-gas mixture on the inner wall of the first ring portion 130, reducing the possibility of self-ignition of the high-temperature mixture around the inner wall of the first ring portion 130, and ensuring the intensity and temperature of the flame flow inside the pre-combustion chamber 100.

[0041] Furthermore, while ensuring that the volume of the pre-combustion chamber 101 restricted by the shell 10 remains unchanged, increasing the radial thickness of the first ring portion 130 will increase the area of ​​the outer surface of the first ring portion 130, so that the force generated instantly when the mixture in the main combustion chamber burns on the first ring portion 130 becomes larger, thereby increasing the possibility of damage to the shell 10. The thickness of the first ring portion 130 in the radial direction is set to be less than or equal to 40% of the diameter of the insertion hole 110, which ensures that the force generated instantly when the mixture in the main combustion chamber burns on the first ring portion 130 is not too large, thereby avoiding safety problems and subsequent maintenance problems caused by damage to the shell 10.

[0042] Furthermore, the first ring portion 130 is also a part of the shell 10 of the pre-combustion chamber 101, and combined with the above-mentioned wall thickness of the pre-combustion chamber 101 being greater than or equal to 10% of the diameter of the insertion hole, that is, the thickness of the first ring portion 130 in the radial direction is c, and the diameter of the insertion hole 110 is b, then the value of c / b should be between 10% and 40%. In the specific implementation process, the thickness of the first ring portion 130 in the radial direction can be set to 15%, 20%, 25%, 30% and 35% of the diameter of the insertion hole according to actual conditions, thereby ensuring that the first ring portion 130 has sufficient strength to resist the force generated instantly when the mixture in the main combustion chamber is burned, and at the same time reducing the loss of heat dissipation energy of the first ring portion 130.

[0043] In one embodiment of the present invention, Figure 1 As shown, the second ring portion 140 is formed into a conical ring shape in the axial direction of the second ring portion, and the cross-sectional outer contour size of the second ring portion 140 gradually decreases in the direction from the first ring portion 130 toward the third ring portion 150 along the axis. In other words, the second ring portion 140 can be formed into a cone cylinder structure with a small opening facing downwards, and in the process of gas flowing from the large opening of the cone cylinder to the small opening, the cone cylinder will accelerate the movement of the gas, that is, in the process of gas flowing from the large opening of the cone cylinder to the small opening, the speed of the gas at the small opening is greater than the speed of the gas at the large opening.

[0044] In the specific implementation process, the spark plug 20 is ignited, first igniting the mixed gas inside the first ring portion 130, and the flame flow flows through the inside of the second ring portion 140 to the inside of the third ring portion 150. Since the second ring portion 140 is configured as a conical cylinder structure with a small mouth facing downward, after the flame flow passes through the inside of the second ring portion 140, the flow speed of the flame flow will increase, thereby increasing the speed of the flame flow passing through the flame hole 120, increasing the energy of the flame flow, and facilitating the flame flow to pass through the pre-combustion chamber 100 to ignite the flammable mixed gas in the main combustion chamber.

[0045] In one embodiment of the present invention, Figure 1 As shown, the thickness of the second ring portion 140 in the radial direction gradually increases in the direction from the first ring portion 130 to the third ring portion 150 along the axis. Since the second ring portion 140 is formed into a cone in the direction from the first ring portion 130 to the third ring portion 150, and the cross-sectional outer contour size of the second ring portion 140 gradually decreases in the direction from the first ring portion 130 to the third ring portion 150, the flame flow will flow faster and faster in the process of flowing in the second ring portion 140 from the first ring portion 130 to the third ring portion 150, effectively preventing local thermal stress concentration, effectively reducing the risk of cracks, and effectively ensuring the service life of the pre-combustion chamber 100.

[0046] Furthermore, in the process of the flame flow flowing in the second ring portion 140 from the first ring portion 130 toward the third ring portion 150, the pressure of the flame flow on the second ring portion 140 will become greater and greater, and the heat will become more and more concentrated. In the direction from the first ring portion 130 toward the third ring portion 150, the radial thickness of the second ring portion 140 is gradually increased, and the radial strength of the second ring portion 140 can be gradually increased, thereby avoiding damage to the shell 10 of the pre-combustion chamber 100 due to excessive pressure on the inner side of the second ring portion 140, and at the same time, it is also beneficial to reduce the loss of heat diffusion from the second ring portion 140.

[0047] In one embodiment of the present invention, Figure 1 As shown, the thickness of the second ring portion 140 at one end close to the first ring portion 130 in the radial direction (eg Figure 2 d) shown in is less than or equal to 1.5 times the radial thickness of the first ring portion 130, and or the thickness of the other end of the second ring portion 140 away from the first ring portion 130 is less than or equal to 2 times the radial thickness of the first ring portion 130, that is, the thickness of the end of the second ring portion 140 close to the first ring portion 130 in the radial direction is less than or equal to 1.5 times the radial thickness of the first ring portion 130, or the thickness of the other end of the second ring portion 140 away from the first ring portion 130 is less than or equal to 2 times the radial thickness of the first ring portion 130, or the thickness of the end of the second ring portion 140 close to the first ring portion 130 in the radial direction is less than While being equal to 1.5 times the radial thickness of the first ring portion 130, the thickness of the other end of the second ring portion 140 away from the first ring portion 130 is less than or equal to 2 times the radial thickness of the first ring portion 130. In the specific implementation process, the thickness in the radial direction of the end of the second ring portion 140 close to the first ring portion 130 can be set to 1.5, 1.4, 1.3 and 1.2 times the radial thickness of the first ring portion 130 according to actual conditions, and the thickness of the other end of the second ring portion 140 away from the first ring portion 130 can be set to 2.0, 1.9, 1.8 and 1.7 times the radial thickness of the first ring portion 130.

[0048] In a specific embodiment, the thickness of the second ring portion 140 at one end close to the first ring portion 130 in the radial direction can be set to 1.4 times the radial thickness of the first ring portion 130, and the thickness of the other end of the second ring portion 140 away from the first ring portion 130 can be set to 1.9 times the radial thickness of the first ring portion 130. This can prevent the transition section between the first ring portion 130 and the third ring portion 150 from having a structure with a local wall thickness mutation, thereby avoiding the rupture of the shell 10 of the pre-combustion chamber 100 due to excessive pressure on the inside of the second ring portion 140, reducing heat loss from the second ring portion 140, and also avoiding damage to the shell 10 due to excessive pressure on the outside due to an excessively large outer area, thereby effectively preventing local thermal stress concentration, effectively reducing the risk of cracks, and effectively ensuring the service life of the pre-combustion chamber 100.

[0049] In one embodiment of the present invention, Figure 1 As shown, in the axial direction of the third ring portion 150, the third ring portion 150 extends in a straight line, and the thickness of the third ring portion 150 in the radial direction (eg Figure 2 The value e) shown in FIG is greater than or equal to 15% and less than or equal to 50% of the diameter of the insertion hole 110. That is, the thickness of the third ring portion 150 in the radial direction is e, and the diameter of the insertion hole 110 is b, then the value of e / b should be between 15% and 50%.

[0050] In a specific embodiment, the thickness of the third ring portion 150 in the radial direction can be set to 25% of the diameter of the insertion hole 110. This setting will not make the area of ​​the outer surface of the third ring portion 150 too large, thereby avoiding damage to the third ring portion 150 caused by excessive force exerted on the pre-combustion chamber 100 shell 10 at the moment of combustion of the mixture in the main combustion chamber. At the same time, it also ensures that the third ring portion 150 has sufficient thickness in the radial direction to reduce the loss of heat dissipation energy in the third ring portion 150, thereby extending the service life of the pre-combustion chamber 100 shell 10.

[0051] In one embodiment of the present invention, Figure 1 As shown, the radial thickness of the third ring portion 150 is greater than or equal to 1.5 times the radial thickness of the first ring portion 130 and less than or equal to 3 times the radial thickness of the first ring portion 130, that is, the radial thickness of the third ring portion 150 is e, and the thickness of the first ring portion 130 is c, then the value of e / c should be between 1.5 and 3. In a specific implementation process, the radial thickness of the third ring portion 150 can be set to 1.8 times, 2 times, and 2.5 times the radial thickness of the first ring portion 130 according to actual conditions.

[0052] Furthermore, since the flame flow is accelerated by the second ring portion 140 during the process of flowing from the first ring portion 130 to the third ring portion 150, the flow velocity of the flame flow of the third ring portion 150 is greater than the flow velocity of the flame flow of the first ring portion 130, and thus the pressure on the inner side of the third ring portion 150 is greater than the pressure on the inner side of the first ring portion 130. The radial thickness of the third ring portion 150 is greater than or equal to 1.5 times the radial thickness of the first ring portion 130. This arrangement can ensure that the third ring portion 150 has sufficient strength to withstand the pressure on the inner side and reduce the loss of heat dissipation energy of the third ring portion 150. The radial thickness of the third ring portion 150 is also required to be less than 3 times the radial thickness of the first ring portion 130. This arrangement can ensure that the outer surface area of ​​the third ring portion 150 is not too large, and thus ensure that the third ring portion 150 is not damaged due to excessive pressure on the outer side, thereby improving the service life of the shell 10 of the pre-combustion chamber 100.

[0053] In one embodiment of the present invention, Figure 1 As shown, the housing 10 further includes a spherical portion 160 connected to one end of the third ring portion 150 away from the second ring portion 140. The spherical portion 160 is formed as a spherical structure protruding outward away from the third ring portion 150. The radial thickness of the spherical portion 160 (e.g. Figure 2 The g) shown in FIG is in the range of 0.8 to 1.5 times the radial thickness of the third ring portion 150. That is, the radial thickness of the spherical portion 160 is g, and the radial thickness of the third ring portion 150 is e, then the ratio of g / e should be between 0.8 and 1.5.

[0054] Preferably, the radial thickness of the spherical portion 160 is set to between 0.9 and 1.2 times the radial thickness of the third ring portion 150, so that when the spherical portion 160 penetrates deep into the main combustion chamber, it has sufficient strength to withstand the thermal stress of the flame flow in the pre-combustion chamber 101 and the combustion explosion pressure and thermal stress of the main combustion chamber.

[0055] In the specific implementation process, the radial thickness of the spherical portion 160 can be set to 0.9 times, 1.0 times, 1.1 times, 1.2 times, 1.3 times and 1.4 times the radial thickness of the third ring portion 150, thereby ensuring that the spherical portion 160 has sufficient strength to withstand the pressure from the inside and outside of the spherical portion 160. The spherical structure can ensure that the inner cavity and outer wall of the lower end arc portion structure are evenly stressed, avoiding stress concentration, forming cracks, and affecting the service life.

[0056] Furthermore, when the spherical portion 160 is cold-started at a limited thickness, the spherical portion 160 penetrates deep into the main combustion chamber and absorbs more heat from the main combustion chamber. The absorbed heat is transferred to the third ring portion 150, the second ring portion 140 and the first ring portion 130, thereby reducing the structural heat dissipation of the shell 10, reducing the energy loss of heat dissipation of the shell 10, and heating the temperature of the oil-gas mixture in the pre-combustion chamber 101 to maintain the temperature of the mixture near the ignition point. When the spark plug 20 is ignited, a flame flow is quickly formed under the ignition of the electric spark, thereby preventing flameout and misfire caused by the mixture temperature being too low during cold start, and allowing the high-energy flame flow of the pre-combustion chamber 100 to effectively ignite the mixture in the main combustion chamber.

[0057] The following will refer to Figure 1-Figure 2 A pre-combustion chamber 100 according to one specific embodiment of the present invention is described.

[0058] Reference Figure 1 The pre-combustion chamber 100 of the embodiment of the present invention may include: a spark plug 20 and a housing 10 .

[0059] The spark plug 20 may include an electrode portion 210 .

[0060] The housing 10 is provided with an insertion hole 110 which is in communication with the pre-combustion chamber 100 and is suitable for inserting the spark plug 20 . The housing 10 is also provided with a flame injection hole 120 which is in communication with the pre-combustion chamber 101 .

[0061] The housing 10 may include a first ring portion 130, a second ring portion 140 and a third ring portion 150 which are sequentially connected in the direction from the insertion hole 110 to the flame injection hole 120. The motor portion of the spark plug 20 is suitable for extending into the inner side of the first ring portion 130. In the direction from the first ring portion 130 to the third ring portion 150, the first ring portion 130 extends along a straight line; the second ring portion 140 is formed into a cone and the cross-sectional profile gradually decreases, and the thickness in the radial direction gradually increases; the third ring portion 150 extends along a straight line.

[0062] The housing 10 may further include a spherical portion 160 connected to an end of the third ring portion 150 that is away from the second ring portion 140 . The spherical portion 160 is formed in a spherical structure that is convex outward away from the third ring portion 150 .

[0063] Specifically, Figure 1 As shown, the lower end of the pre-combustion chamber 100 is in the main combustion chamber, and the flammable mixture in the main combustion chamber enters the pre-combustion chamber 100 through the flame injection hole 120 in the pre-combustion chamber 100. The electrode portion 210 of the spark plug 20 penetrates into the first ring portion 130. When the spark plug 20 is energized, the voltage in the electrode portion 210 increases instantly, breaking through the air between the two electrode portions to generate sparks. The sparks first ignite the mixed gas inside the first ring portion 130 to form a flame flow, which flows through the second ring portion 140 in sequence. The inner side accelerates and ignites the mixed gas inside the second ring portion 140, and then the flame flow reaches the inner side of the third ring portion 150 and ignites the mixed gas inside the third ring portion 150. The flame flow finally reaches the spherical portion 160 and is ejected to the main combustion chamber through the flame hole 120 on the spherical portion 160, igniting the mixed gas in the main combustion chamber. At the moment when the mixed gas in the main combustion chamber is ignited, a force is applied to the outer surface of the shell 10 of the pre-combustion chamber 100, and a working cycle of the pre-combustion chamber 100 is ended.

[0064] The vehicle according to the second embodiment of the present invention comprises a spark plug 20 and a pre-combustion chamber 100 according to the first embodiment of the present invention.

[0065] Specifically, the spark plug 20 extends from the insertion hole into the pre-combustion chamber 101 for ignition. The spark plug 20 is commonly known as a spark nozzle. The function of the spark plug 20 is to discharge the pulse high voltage electricity sent by the high-voltage wire, break through the air in the electrode part 210 of the spark plug 20, generate electric sparks to ignite the mixed gas in the pre-combustion chamber 101.

[0066] For example, Figure 1As shown, the electrode portion 210 of the spark plug 20 penetrates deep into the first ring portion 130, so that the electric spark generated by the spark plug 20 can effectively ignite the oil-gas mixture in the first ring portion 130, avoid the different propagation distances and times of the electric spark, cause the surrounding mixture to self-ignite, and reduce the possibility of detonation in the pre-combustion chamber 101.

[0067] The engine, frame, etc. and operations of other structural examples of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0068] The vehicle according to the embodiment of the present invention is provided with the pre-combustion chamber 100 of the first embodiment, thereby improving the overall performance of the vehicle.

[0069] According to the precombustion chamber 100 of the embodiment of the present invention, by setting the wall thickness of the precombustion cavity 101 to be greater than or equal to 10% of the diameter of the insertion hole 110, the shell 10 of the precombustion chamber 100 has a certain strength, and the loss of heat dissipation energy of the shell 10 structure can be effectively reduced, so that the high-energy flame flow of the precombustion chamber 100 can effectively ignite the mixture in the main combustion chamber, so that the mixture in the main combustion chamber is fully burned, thereby improving the economy of the engine and improving the emission performance of the engine.

[0070] 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. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0071] 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.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pre-combustion chamber, characterized in that: The invention comprises a shell, a pre-combustion chamber is formed in the shell, an insertion hole connected with the pre-combustion chamber and suitable for inserting a spark plug is formed on the shell, and a flame injection hole connected with the pre-combustion chamber is also formed on the shell, wherein the wall thickness of the pre-combustion chamber is greater than or equal to 10% of the diameter of the insertion hole; The housing comprises a first ring portion, a second ring portion and a third ring portion which are sequentially connected in the axial direction; The radial thickness from the first ring portion to the third ring portion increases gradually as a whole; The shell also includes a spherical portion connected to one end of the third ring portion away from the second ring portion, the spherical portion is formed as a spherical structure protruding outward away from the third ring portion, and the radial thickness of the spherical portion is in the range of 1.1 to 1.5 times the radial thickness of the third ring portion.

2. The precombustion chamber according to claim 1, characterized in that The insertion hole is arranged at one end of the shell in the axial direction, the flame-spraying hole is arranged at the other end of the shell in the axial direction, and the insertion hole is formed at the inner side of the first ring portion.

3. The pre-combustion chamber according to claim 2, characterized in that The first ring portion extends in the axial direction, and a thickness of the first ring portion in the radial direction is less than or equal to 40% of a diameter of the insertion hole.

4. The precombustion chamber according to claim 2 or 3, characterized in that: The second ring portion is formed into a conical ring shape in the axial direction, and the outer contour size of the cross section of the second ring portion gradually decreases from one end close to the first ring portion to the other end.

5. The pre-combustion chamber according to claim 4, characterized in that The thickness of the second ring portion in the radial direction gradually increases from one end close to the first ring portion to the other end.

6. The pre-combustion chamber according to claim 4, characterized in that The thickness of the end of the second ring portion close to the first ring portion in the radial direction is less than or equal to 1.5 times the radial thickness of the first ring portion; and / or The thickness of the other end of the second ring portion away from the first ring portion is less than or equal to twice the radial thickness of the first ring portion.

7. The precombustion chamber according to claim 2 or 3, characterized in that: The third ring portion extends in the axial direction, and a thickness of the third ring portion in the radial direction is greater than or equal to 15% of a diameter of the insertion hole and less than or equal to 50% of the diameter of the insertion hole.

8. The pre-combustion chamber according to claim 7, characterized in that The radial thickness of the third ring portion is greater than or equal to 1.5 times the radial thickness of the first ring portion and less than or equal to 3 times the radial thickness of the first ring portion.

9. A vehicle, characterized in that: It comprises a spark plug and a pre-combustion chamber according to any one of claims 1 to 8, wherein the spark plug extends from the insertion hole into the pre-combustion chamber for ignition.

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