Laser ignition device, laser guide assembly and internal combustion engine

Abstract

The invention relates to a laser ignition device, a laser guiding assembly and an internal combustion engine. The laser guiding assembly comprises a sleeve, a light guiding part and a field lens. The light guide piece is arranged in the sleeve in a penetrating mode. The field lens is installed on the sleeve and located in front of the light guide piece, and a plurality of annular light-emitting parts which are sequentially arranged in a nested mode from inside to outside are arranged on the light-emitting face of the field lens. During use, the light guide part transmits laser emitted by the laser device to the field lens, the laser is shaped by the field lens and is emitted outwards through the plurality of light emitting parts of the light emitting surface, and the laser emitted outwards is a plurality of annular light spots which are sequentially nested from inside to outside. Furthermore, when the multiple annular light spots hit the ignition positions of the combustion chamber, the overall area is large, and the number of the ignition positions is large. Therefore, the situation that materials in the cylinder are damaged due to the fact that the light spot energy density is too concentrated due to the small light spot area can be prevented, the ignition success rate can be increased due to the large ignition area, fuel can be fully combusted, and therefore the fuel utilization rate is increased, and emission of harmful substances is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of laser ignition, and particularly to a laser ignition device, a laser guiding component and an internal combustion engine. Background Art

[0002] With the intensification of the global energy crisis and the improvement of environmental protection awareness, laser ignition technology has emerged. The application background of laser ignition technology stems from the need to break through the bottleneck of traditional spark plug ignition technology, environmental protection policy pressure, and the exploration of the upgrading path of internal combustion engine high-efficiency. The laser ignition energy conversion rate is 5 orders of magnitude higher than that of traditional spark plugs, and can form a plasma with a higher energy density, significantly improving the ignition stability. Moreover, the laser ignition can freely adjust the ignition position, energy and time to achieve the optimal combustion path. It provides technical support for clean power solutions such as lean combustion and hydrogen engines, and at the same time meets the strategic goal of the low-carbon transformation of the automotive industry.

[0003] The laser ignition technology in the related art uses a laser spot with a high energy density to ignite fuel. The specific process includes the following steps: Focus the laser beam, and focus the laser beam to a very small point through a lens system to form a spot with a high power density. Ignite the fuel. When the laser spot irradiates the fuel surface, the high power density is sufficient to make the fuel reach the ignition point, thereby igniting the fuel. Control the ignition process. By precisely controlling the position and size of the laser spot, the precise control of the ignition process can be achieved.

[0004] However, when the power density of the laser spot is relatively high, it is easy to cause local high temperature, which may change the properties of the in-cylinder materials (such as coating deterioration); when the power density of the laser spot is relatively low, it is easy to cause a decrease in the ignition success rate, and there are defects such as incomplete combustion of the fuel, resulting in fuel waste and harmful emissions. Summary of the Invention

[0005] Based on this, it is necessary to overcome the defects of the prior art and provide a laser ignition device, a laser guiding component and an internal combustion engine, which can avoid damaging the in-cylinder materials, improve the ignition success rate, and can achieve complete combustion of the fuel, thereby improving the fuel utilization rate and reducing the emission of harmful substances.

[0006] On the one hand, the present application provides a laser guiding component, including:

[0007] A sleeve;

[0008] A light guiding member for conducting the laser emitted by the laser, and the light guiding member is disposed through the sleeve; and

[0009] A field lens is installed in the sleeve, the field lens is located in front of the light guide, and the light-emitting surface of the field lens is provided with a plurality of light-emitting parts that are annular and nested in sequence from the inside to the outside.

[0010] In one embodiment, the light emitting surface is provided with a plurality of protrusions protruding in a direction away from the light guide member, the protrusions are arranged in a ring shape, and each light emitting portion is correspondingly arranged on each protrusion.

[0011] In one embodiment, the laser guide assembly further includes a protective lens, which is mounted on the sleeve and located in front of the field lens.

[0012] In one embodiment, the laser guide assembly further includes a protective cover, which is connected to the sleeve and is arranged outside the protective lens. The protective cover is provided with a light-transmitting portion located in front of the protective lens, and the light-transmitting portion is arranged opposite to the protective lens.

[0013] In one embodiment, the protective cover is further provided with a reflective portion, which is located in front of the protective lens and is used to reflect the peripheral light spot emitted by the field lens to the surface of the protective lens; the reflective portion is arranged close to the side wall of the protective cover.

[0014] In one embodiment, the reflective portion is arranged around the circumference of the light-transmitting portion; and / or the reflective portion is arranged as an arc-shaped surface or an inclined surface arranged at an angle to the protective lens.

[0015] In one embodiment, a first flange is provided on the periphery of the field lens, and a second flange is provided on the periphery of the protective lens; the laser guide assembly further comprises a support sleeve, which is provided on the outside of the field lens and abuts between the first flange and the second flange, and a gap is provided between the protective lens and the field lens along the axial direction of the sleeve; the protective cover and the second flange abut against each other along the axial direction.

[0016] In one embodiment, the laser guide assembly further includes a protective sleeve, which is inserted into the sleeve and is also sleeved on the outside of the light guide; the protective sleeve is a sleeve made of ceramic material; and / or,

[0017] The sleeve is detachably arranged on the cylinder block of the internal combustion engine. The laser guide assembly further includes an auxiliary disassembly component connected to the sleeve.

[0018] On the other hand, the present application provides a laser ignition device, which includes a laser and the laser guide assembly, wherein the laser is used to emit laser light to the guide.

[0019] In another aspect, the present application provides an internal combustion engine, and the internal combustion engine includes the laser ignition device described above.

[0020] When the above-mentioned laser ignition device, laser guiding component and internal combustion engine are in use, the light guiding member conducts the laser emitted by the laser to the field lens. The laser is shaped by the field lens and is emitted outward through a plurality of light emitting portions on the light emitting surface. The laser emitted outward is a plurality of annular light spots arranged in nested order from inside to outside. Furthermore, when the plurality of annular light spots hit the ignition position of the combustion chamber, the overall area is relatively large, and the ignition positions are scattered and numerous. In this way, not only can it prevent damage to the in-cylinder materials due to the overly concentrated energy density of the light spot caused by the small area of the light spot, but also due to the large area of the ignition region, the ignition success rate can be improved, and the fuel can be fully burned, thereby improving the fuel utilization rate and reducing the emission of harmful substances. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional structural view of a laser guiding component according to an embodiment of the present application.

[0022] Figure 2 is Figure 1 An enlarged structural view at A.

[0023] Figure 3 is Figure 1 An enlarged structural view at B.

[0024] Figure 4 It is a structural view of a plurality of annular light spots formed by a laser guiding component according to an embodiment of the present application.

[0025] Figure 5 It is an exploded structural view of a laser guiding component according to an embodiment of the present application.

[0026] Figure 6 is Figure 5 A structural view of the field lens in the laser guiding component shown.

[0027] Figure 7 is Figure 5 A structural view of the protective cover in the laser guiding component shown.

[0028] Figure 8 is Figure 5 A structural view of the light guiding member in the laser guiding component shown.

[0029] Figure 9 is Figure 8 An enlarged structural view at C.

[0030] 10. Laser guiding assembly; 11. Sleeve; 12. Light guiding member; 13. Field lens; 131. Light emitting portion; 132. Protruding portion; 133. First flange; 14. Protective lens; 141. Second flange; 15. Protective cover; 151. Light transmitting portion; 152. Reflective portion; 153. Side wall; 154. Cover plate; 16. Support sleeve; 17. Protective sleeve; 171. Positioning recess; 18. Auxiliary disassembly member; 20. Annular light spot. Detailed implementation manner

[0031] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manner of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0032] It should be noted that in this embodiment, "front" and "rear" are both referenced to the ignition position. Close to the ignition position is the front, and far from the ignition position is the rear.

[0033] Refer to Figure 1 and Figure 5 , Figure 1 which shows a cross-sectional structure diagram of the laser guiding assembly 10 according to an embodiment of the present application, Figure 5 and which shows an exploded structure diagram of the laser guiding assembly 10 according to an embodiment of the present application. A laser guiding assembly 10 provided by an embodiment of the present application includes a sleeve 11, a light guiding member 12, and a field lens 13. The light guiding member 12 is used to conduct the laser emitted by the laser, and the light guiding member 12 is disposed through the sleeve 11.

[0034] Please refer to Figure 2 , Figure 4 and Figure 6 again, the field lens 13 is installed on the sleeve 11. The field lens 13 is located in front of the light guiding member 12, and a plurality of light emitting portions 131 arranged in a ring shape and nested in sequence from the inside to the outside are provided on the light emitting surface of the field lens 13.

[0035] The above-mentioned laser guiding assembly 10, when in use, the light guiding member 12 conducts the laser emitted by the laser to the field lens 13. The laser is shaped by the field lens 13 and is emitted outward through a plurality of light emitting portions 131 on the light emitting surface. The laser emitted outward is a plurality of annular light spots 20 which are arranged in a nested manner from the inside to the outside in sequence. Furthermore, when the plurality of annular light spots 20 hit the ignition position of the combustion chamber, the overall area is relatively large, and the ignition positions are scattered and numerous. In this way, it can not only prevent damage to the in-cylinder materials due to excessive concentration of the energy density of the light spot caused by the small area of the light spot, but also, due to the large area of the ignition region, can improve the ignition success rate, and can achieve full combustion of the fuel, thereby improving the fuel utilization rate and reducing the emission of harmful substances.

[0036] It should be noted that regardless of whether the fuel is gas, combustible liquid or combustible solid, etc., when the plurality of annular light spots 20 irradiate the fuel continuously or in a pulsed manner, multi-point ignition and synchronous ignition can be achieved, that is, the area of the ignition region is large and the annular light spots 20 are scattered widely, which can improve the ignition success rate, and the fuel burns fully and has a high utilization rate.

[0037] Among them, the plurality of annular light spots 20 emitted outward by the field lens 13 include but are not limited to two, three, four, five or more in number. The specific number is not limited here and can be flexibly adjusted and set according to actual needs.

[0038] In this embodiment, the annular light spot 20 is specifically as Figure 4 shown in the figure is three. The three annular light spots 20 respectively correspond to three different positions of the piston in the combustion chamber. One of the annular light spots 20 is located at the central part of the piston, another annular light spot 20 is located at the edge part of the piston, and another annular light spot 20 is located between the central part and the edge part of the piston. The central part, the edge part and the position between the central part and the edge part of the piston will all be ignited. The area of the ignition region is relatively large and the span is large. It not only avoids excessive local temperature rise caused by light spot concentration, but also can improve the ignition success rate and achieve full combustion of the fuel. In addition, the number of the annular light spots 20 is not too many to cause an increase in the power of the laser, that is, the power of the laser is small, resulting in low energy consumption and playing a role in saving energy.

[0039] In order to facilitate the laser to be emitted outward through the light emitting portion 131, the light emitting portion 131 is polished to form a bright surface, and the laser can be emitted outward through the bright surface. In addition, the portion other than the light emitting portion 131 on the light emitting surface, that is, the portion between any two adjacent light emitting portions 131, is set as a rough surface. Among them, the rough surface is also called a matte surface, and the laser cannot pass through the rough surface, thereby reducing the power of the laser.

[0040] It should be noted that the shapes of the respective light emitting portions 131 can be the same or different from each other. This is not limited here and can be flexibly adjusted and set according to actual needs, and all are within the protection scope of this application.

[0041] Optionally, the shape of the light-emitting part 131 includes, but is not limited to, an annular shape, a polygonal shape, or other irregular shapes, and can be flexibly adjusted and set according to actual requirements, and will not be limited herein.

[0042] Among them, the shape of the light-emitting part 131 determines the shape of the corresponding annular light spot 20. When the shape of the light-emitting part 131 is set to an annular shape, the shape of the annular light spot 20 is correspondingly set to an annular shape. When the shape of the light-emitting part 131 is set to a polygonal shape, the shape of the annular light spot 20 is correspondingly set to a polygonal shape.

[0043] Among them, the light-emitting part 131 can be either a closed ring or an open ring, which is not limited herein and is within the protection scope of this application.

[0044] Please refer to Figure 2 and Figure 6 , for example, the light-emitting surface is provided with a plurality of protruding parts 132 protruding in a direction away from the light guide member 12. The protruding parts 132 are arranged in an annular shape, and each light-emitting part 131 is correspondingly arranged on each protruding part 132. In this way, compared with setting the entire light-emitting surface as a plane, the protruding parts 132 play a role in focusing the laser, so that the power of the laser can be relatively reduced and energy can be saved.

[0045] It should be noted that the "protruding part 132" in this embodiment can be "a part of the field lens 13", that is, the "protruding part 132" and the "other parts of the field lens 13" are integrally formed; it can also be an independent component separable from the "other parts of the field lens 13", that is, the "protruding part 132" can be independently manufactured and then combined with the "other parts of the field lens 13" into a whole.

[0046] Among them, during the combustion process of the fuel in the combustion chamber, various pollutants such as dust will inevitably be generated. When the pollutants contact the light-emitting surface of the field lens 13, they will adhere to the light-emitting part 131, which will cause the light-emitting part 131 to be opaque and make the ignition fail.

[0047] Please refer to Figure 1 , Figure 2 and Figure 5 , for example, the laser guiding assembly 10 further includes a protective lens 14. The protective lens 14 is installed on the sleeve 11, and the protective lens 14 is located in front of the field lens 13. In this way, the protective lens 14 can play a role in isolating the fuel, effectively prevent the field lens 13 from being polluted, ensure the performance of the field lens 13, and can isolate high temperature and extend the service life of the field lens 13.

[0048] Please refer to Figure 1 , Figure 2 and Figure 5, for example, the laser guiding assembly 10 further includes a protective cover 15. The protective cover 15 is connected to the sleeve 11. The protective cover 15 covers outside the protective lens 14. The protective cover 15 is provided with a light-transmitting portion 151 in front of the protective lens 14. The light-transmitting portion 151 is arranged opposite to the protective lens 14. In this way, the protective cover 15 plays a protective role for the protective lens 14, reducing damage to the protective lens 14. Moreover, the annular light spot 20 can be emitted outward through the protective lens 14 and the light-transmitting portion 151.

[0049] , for example, the light-transmitting portion 151 includes but is not limited to a light-transmitting hole formed in the protective cover 15. In this way, it is convenient to process and form the light-transmitting portion 151 on the protective cover 15. Moreover, the protective cover 15 can be made of a non-light-transmitting material, such as made of a metal material, so as to be heat-resistant, have a relatively large structural strength and good protection performance.

[0050] Of course, in some alternative solutions, the light-transmitting portion 151 can also be made of a heat-resistant light-transmitting material.

[0051] Please refer to Figure 2 and Figure 7 , for example, the protective cover 15 is further provided with a light-reflecting portion 152. The light-reflecting portion 152 is located in front of the protective lens 14. The light-reflecting portion 152 is used to reflect the peripheral light spot emitted by the field lens 13 to the surface of the protective lens 14. The light-reflecting portion 152 is arranged close to the side wall 153 of the protective cover 15. In this way, a part of the light spot emitted from the light-emitting surface of the field lens 13, for example, is incident forward into the combustion chamber through the light-transmitting portion 151, while another part of the light spot, that is, for example, the peripheral light spot, is incident on the light-reflecting portion 152 and can be reflected by the light-reflecting portion 152 to the surface of the protective lens 14, which can clean the pollutants on the protective lens 14, ensure that the protective lens 14 is in a clean state, so as to ensure that the light spot can be normally emitted outward through the protective lens 14, and effectively avoid ignition failure caused by pollutant residues on the surface of the protective lens 14. In addition, the light-reflecting portion 152 is arranged close to the side wall 153 of the protective cover 15, that is, arranged at the edge part of the protective lens 14, so as to avoid most of the light spots. Most of the light spots can be emitted outward through the light-transmitting portion 151, ensuring the ignition success rate.

[0052] On the basis of the foregoing embodiment, the light-reflecting portion 152 can be either a bright surface provided on the inner wall of the protective cover 15, or a light-reflecting member provided on the inner wall of the protective cover 15, or any other structural form that can achieve light reflection. Among them, the light-reflecting member includes but is not limited to a light-reflecting coating or a light-reflecting lens, etc.

[0053] Exemplarily, the light reflecting part 152 includes, but is not limited to, being circumferentially arranged around the light transmitting part 151. In this way, when at least the outermost one or two circles of light spots are incident on the annular light reflecting part 152, they can be reflected by the light reflecting part 152 to the protective lens 14, and the area of the light spots reflected on the surface of the protective lens 14 is relatively large, so as to have a better cleaning effect.

[0054] Exemplarily, the light reflecting part 152 includes, but is not limited to, being set as an arc surface or a bevel surface arranged at an angle with the protective lens 14.

[0055] Exemplarily, the protective cover 15 includes a side wall 153 and a cover plate 154 connected to the side wall 153. The side wall 153 is sleeved on the sleeve 11 and is detachably connected to the sleeve 11. The specific connection methods include, but are not limited to, threaded mating connection, snap connection or riveting, etc. In addition, the cover plate 154 is located in front of the protective lens 14, and the light transmitting part 151 is formed on the cover plate 154. The light reflecting part 152 is arranged on the inner wall of the cover plate 154 and, for example, is circumferentially arranged around the light transmitting part 151.

[0056] Please refer to Figure 2 , exemplarily, there is a gap between the protective lens 14 and the field lens 13 along the axial direction of the sleeve 11. In this way, this gap can leave a space for the thermal expansion and contraction of the field lens 13 in a high-temperature environment, and prevent the field lens 13 from damaging the protective lens 14 due to thermal expansion and extrusion of the protective lens 14.

[0057] On the basis of the foregoing embodiments, a first flange 133 is provided on the outer periphery of the field lens 13, and a second flange 141 is provided on the outer periphery of the protective lens 14. The laser guiding assembly 10 further includes a support sleeve 16, and the support sleeve 16 is sleeved outside the field lens 13 and abuts between the first flange 133 and the second flange 141. Under the abutting action of the support sleeve 16, a gap can be provided between the protective lens 14 and the field lens 13 along the axial direction of the sleeve 11. The protective cover 15 and the second flange 141 abut against each other along the axial direction.

[0058] Exemplarily, the sleeve 11 is provided with a first thread, the inner wall of the protective cover 15 is provided with a second thread, and the outer wall of the support sleeve 16 is provided with a third thread. Both the first thread and the third thread are adapted to the second thread, so as to realize the detachable assembly of the sleeve 11, the protective cover 15 and the support sleeve 16 together. Under the fixing action of the protective cover 15, the support sleeve 16, the field lens 13 and the protective lens 14 are all stably installed at the front end of the sleeve 11 and are all arranged inside the protective cover 15 and are protected by the protective cover 15.

[0059] Please refer to Figure 1 , Figure 2 and Figure 5 , exemplarily, the light guiding member 12 includes, but is not limited to, being set as a column.

[0060] Please refer to Figure 2, Figure 8 and Figure 9 , for example, a positioning recess 171 is formed on the front end face of the protective sleeve 17, the positioning recess 171 is fitted with the rear wall of the field lens 13, and the field lens 13 is installed in the positioning recess 171. In this way, the installation stability of the field lens 13 can be improved.

[0061] Please refer to Figure 2 and Figure 6 , for example, the laser guiding assembly 10 further includes a protective sleeve 17. The protective sleeve 17 is inserted through the sleeve 11, and the protective sleeve 17 also sleeved outside the light guiding member 12. In this way, the protective sleeve 17 can stably arrange the light guiding member 12 in the sleeve 11 and can play a role in protecting the light guiding member 12.

[0062] On the basis of the foregoing embodiment, the protective sleeve 17 is a sleeve body made of ceramic material. In this way, the protective sleeve 17 is heat-resistant, not easily damaged, and has a heat dissipation and cooling effect.

[0063] Among them, the materials of the light guiding member 12 and the field lens 13 can be set according to actual needs. In one embodiment, the light guiding member 12 and the field lens 13 both include but are not limited to being made of quartz material, so that they can be heat-resistant and the service life can be extended.

[0064] Among them, the sleeve 11 is equivalent to a base and plays a role in supporting various components such as the light guiding member 12, the field lens 13, the protective lens 14, and the support sleeve 16. Installing the sleeve 11 on the cylinder block of the internal combustion engine can realize the installation of the laser guiding assembly 10 on the cylinder block of the internal combustion engine.

[0065] For example, the sleeve 11 is detachably arranged on the cylinder block of the internal combustion engine. Optionally, a fourth thread is provided on the outer wall of the sleeve 11, and the cylinder block is provided with a mounting hole, and the mounting hole is, for example, a threaded hole. The fourth thread is adapted to the mounting hole. In this way, the sleeve 11 can be quickly disassembled and assembled on the cylinder block of the internal combustion engine.

[0066] Please refer to Figure 1 and Figure 3 , on the basis of the foregoing embodiment, the laser guiding assembly 10 further includes an auxiliary disassembly member 18. The auxiliary disassembly member 18 is connected to the sleeve 11. Optionally, the auxiliary disassembly member 18 is, for example, set as an auxiliary sleeve, and the auxiliary sleeve is sleeved outside the sleeve 11 and, for example, is snap-fitted with the sleeve 11 to realize a fixed connection outside the sleeve 11. Protective lines can be provided on the auxiliary sleeve, and by rotating, it is convenient to remove the auxiliary sleeve.

[0067] Please refer to again Figure 1 and Figure 5 , on the other hand, the present application also provides a laser ignition device, the laser ignition device includes a laser and the laser guiding assembly 10 of any of the foregoing embodiments, and the laser is used to emit laser light to the guiding member.

[0068] In the above laser ignition device, during use, the light guide 12 conducts the laser emitted by the laser to the field lens 13. The laser is shaped by the field lens 13 and is emitted outward through a plurality of light-emitting portions 131 on the light-emitting surface. The laser emitted outward is a plurality of annular light spots 20 which are arranged in a nested manner from the inside to the outside in sequence. Furthermore, when the plurality of annular light spots 20 hit the ignition position of the combustion chamber, the overall area is relatively large, and the ignition positions are scattered and numerous. In this way, not only can it prevent damage to the in-cylinder material due to the overly concentrated energy density of the light spot caused by the small area of the light spot, but also due to the large area of the ignition region, it can improve the ignition success rate, and can achieve full combustion of the fuel, thereby improving the fuel utilization rate and reducing the emission of harmful substances.

[0069] Please refer to again Figure 1 and Figure 5 On the other hand, the present application also provides an internal combustion engine, and the internal combustion engine includes the laser ignition device of any one of the above embodiments.

[0070] In the above internal combustion engine, during use, the light guide 12 conducts the laser emitted by the laser to the field lens 13. The laser is shaped by the field lens 13 and is emitted outward through a plurality of light-emitting portions 131 on the light-emitting surface. The laser emitted outward is a plurality of annular light spots 20 which are arranged in a nested manner from the inside to the outside in sequence. Furthermore, when the plurality of annular light spots 20 hit the ignition position of the combustion chamber, the overall area is relatively large, and the ignition positions are scattered and numerous. In this way, not only can it prevent damage to the in-cylinder material due to the overly concentrated energy density of the light spot caused by the small area of the light spot, but also due to the large area of the ignition region, it can improve the ignition success rate, and can achieve full combustion of the fuel, thereby improving the fuel utilization rate and reducing the emission of harmful substances.

[0071] In the description of the present application, it should be understood that if there appear such terms as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present application.

[0072] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0073] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0074] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0075] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0076] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0077] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A laser guiding component, characterized in that, Comprising: A sleeve; A light guide member for conducting the laser emitted by a laser, the light guide member being disposed through the sleeve; and A field lens mounted on the sleeve, the field lens being located in front of the light guide member, and a plurality of light-emitting portions arranged in a ring shape and nested in sequence from inside to outside being provided on the light-emitting surface of the field lens.

2. The laser guiding component according to claim 1, characterized in that, A plurality of protruding portions protruding in a direction away from the light guide member are provided on the light-emitting surface, the protruding portions are arranged in a ring shape, and each of the light-emitting portions is correspondingly provided on each of the protruding portions.

3. The laser guiding component according to claim 1, characterized in that, The laser guiding assembly further includes a protective lens mounted on the sleeve, and the protective lens is located in front of the field lens.

4. The laser guiding component according to claim 3, wherein The laser guiding assembly further includes a protective cover connected to the sleeve, the protective cover covers outside the protective lens, a light-transmitting portion located in front of the protective lens is provided on the protective cover, and the light-transmitting portion is arranged opposite to the protective lens.

5. The laser guiding component according to claim 4, characterized in that, The protective cover further includes a light-reflecting portion located in front of the protective lens, and the light-reflecting portion is used for reflecting the peripheral light spot emitted by the field lens to the surface of the protective lens; the light-reflecting portion is arranged close to the side wall of the protective cover.

6. The laser guiding component according to claim 5, characterized in that, The light-reflecting portion is arranged circumferentially around the light-transmitting portion; and / or, the light-reflecting portion is arranged as a curved surface or an inclined surface arranged at an angle with the protective lens.

7. The laser guiding component according to claim 4, wherein A first flange is provided on the outer periphery of the field lens, and a second flange is provided on the outer periphery of the protective lens; the laser guiding assembly further includes a support sleeve sleeved outside the field lens and abutted between the first flange and the second flange, a gap is provided between the protective lens and the field lens along the axial direction of the sleeve; the protective cover and the second flange are abutted against each other along the axial direction.

8. The laser guiding component according to claim 1, characterized in that, The laser guiding assembly further includes a protective sleeve disposed through the sleeve, and the protective sleeve is also sleeved outside the light guide member; the protective sleeve is a sleeve body made of a ceramic material; and / or, The sleeve is detachably disposed on the cylinder block of an internal combustion engine, and the laser guiding assembly further includes an auxiliary disassembly member connected to the sleeve.

9. A laser ignition device, characterized in that, The laser ignition device includes a laser and the laser guiding assembly according to any one of claims 1 to 8, and the laser is used for emitting laser to the guiding member.

10. An internal combustion engine, characterized in that, The internal combustion engine includes the laser ignition device according to claim 9.

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