Ignition device for zero low carbon engine, engine and operating device

Abstract

The invention discloses an ignition device for a zero-low-carbon engine, the engine and operation equipment, and the ignition device comprises a spark plug which is provided with an ignition structure; a protection cavity is formed in the protection cover, the protection cover is connected to the spark plug, the ignition structure is contained in the protection cavity, the protection cover is provided with an ignition opening, and the protection cavity is communicated with the external space of the protection cover through the ignition opening. According to the ignition device for the zero-low-carbon engine, the protective cover is arranged to protect the ignition structure of the sparking plug, so that the airflow state near the ignition structure is relatively stable, and disturbance of a combustible mixture formed by fuel and air to the ignition structure can be reduced; the ignition device can accurately and reliably control the ignition time, and safe operation of an engine is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to an ignition device for a zero-low-carbon engine, an engine having the ignition device, and an operating device having the engine. Background Art

[0002] Dual-fuel technology, which uses highly active fuels such as diesel to ignite, is one of the most commonly used auxiliary ignition technologies. It requires the use of dual fuel tanks or new dual-fuel injectors, which has high technical costs and poor economic efficiency. In related technologies, spark plugs are a mature ignition technology used in light gasoline engines. When they are used in direct injection heavy-duty engines, their initial fire core formation and subsequent flame propagation process are easily affected by the fuel-air mixing state and flow in the cylinder near them. It is extremely difficult to control the ignition timing, and it is easy to have problems such as ignition difficulty or flameout. Summary of the invention

[0003] 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 an ignition device for a zero-low carbon engine, which can reduce airflow disturbance near the spark plug, facilitate accurate and stable ignition, and has a low installation cost.

[0004] According to an embodiment of the present invention, an ignition device for a zero-low-carbon engine includes: a spark plug, wherein the spark plug is provided with an ignition structure; a protective cover, wherein a protective cavity is formed in the protective cover, the protective cover is connected to the spark plug, and the ignition structure is accommodated in the protective cavity, the protective cover is provided with an ignition opening, and the ignition opening is used to connect the protective cavity with the external space of the protective cover.

[0005] According to the ignition device for a zero-low-carbon engine according to an embodiment of the present invention, a protective cover is provided to protect the ignition structure of the spark plug, so that the airflow state near the ignition structure can be made relatively stable, thereby reducing the disturbance of the combustible mixture formed by fuel and air to the ignition structure, which is beneficial for the ignition device to accurately and reliably control the ignition timing and ensure the safe operation of the engine.

[0006] According to some embodiments of the ignition device for a zero-low carbon engine of the present invention, the ignition structure is located at the end of the spark plug, the protective cover is sleeved outside the spark plug and the protective cavity is formed at the end of the spark plug.

[0007] According to some embodiments of the present invention, an ignition device for a zero-low-carbon engine, the ignition structure includes a center electrode and a side electrode, at least a portion of the side electrode is spaced apart from an end surface of the spark plug to jointly define an ignition space, and at least a portion of the center electrode is located within the ignition space.

[0008] According to the ignition device for a zero-low-carbon engine in some embodiments of the present invention, the ignition opening is provided on a side wall of the protective cover, and the ignition space has an open side, which is open toward the ignition opening.

[0009] According to some embodiments of the present invention, in an ignition device for a zero-low-carbon engine, the side electrode includes a first electrode segment and a second electrode segment; wherein the first electrode segment is connected to the end face of the spark plug, the first electrode segment extends along the axial direction of the spark plug, the second electrode segment is connected to the first electrode segment by a bend, and the second electrode segment extends toward the ignition opening.

[0010] According to the ignition device for a zero-low-carbon engine in some embodiments of the present invention, the protective cover is further provided with a second opening, and the second opening is spaced apart from the ignition opening.

[0011] According to some embodiments of the ignition device for a zero-low-carbon engine of the present invention, the ignition opening is arranged on the side wall of the protective cover, the second opening is formed at the end of the protective cover, and the opening direction of the ignition opening is perpendicular to the opening direction of the second opening.

[0012] According to the ignition device for a zero-low-carbon engine in some embodiments of the present invention, the protective cover is detachably connected to the spark plug.

[0013] The invention also provides an engine.

[0014] An engine according to an embodiment of the present invention comprises a cylinder, a fuel injector and an ignition device for a zero-low carbon engine as described in any one of the above embodiments, wherein a combustion chamber is formed in the cylinder, the spark plug and the fuel injector are both installed in the cylinder, the ignition structure and the protective cover are both located in the combustion chamber, the ignition opening connects the protective cavity with the combustion chamber, and the fuel injector is used to inject fuel into the combustion chamber.

[0015] The invention also provides an operating device.

[0016] The operating device according to the embodiment of the present invention is characterized in that it includes the engine of the above embodiment.

[0017] The advantages of the operating device, the engine and the above-mentioned ignition device compared with the prior art are the same and will not be repeated here.

[0018] 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

[0019] 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:

[0020] Figure 1 is a schematic structural diagram of an engine according to an embodiment of the present invention;

[0021] Figure 2 is a side view of an ignition device for a zero-low-carbon engine according to an embodiment of the present invention;

[0022] Figure 3 is a front view of an ignition device for a zero-low-carbon engine according to an embodiment of the present invention;

[0023] Figure 4 is a bottom view of an ignition device for a zero-low-carbon engine according to an embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of an ignition device for a zero-low carbon engine according to an embodiment of the present invention during fuel injection;

[0025] Figure 6 is a schematic diagram of an ignition device for a zero-low carbon engine according to an embodiment of the present invention during an ignition process;

[0026] Figure 7 It is a schematic diagram of the ignition device for a zero-low carbon engine in flame propagation according to an embodiment of the present invention.

[0027] Reference numerals:

[0028] Engine 100,

[0029] Ignition device 1, spark plug 11, ignition structure 111, central electrode 112, side electrode 113, first electrode segment 114, second electrode segment 115, ignition space 116, protective cover 12, protective cavity 121, ignition opening 122, second opening 123,

[0030] Cylinder 2, cylinder head 21, intake port 211, exhaust port 212,

[0031] Piston 3, connecting rod 4, crankshaft 5, fuel injector 6. DETAILED DESCRIPTION

[0032] 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.

[0033] 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Reference below Figure 1-Figure 7 An ignition device 1 for a zero-low-carbon engine according to an embodiment of the present invention is described. The ignition device 1 can form a stable airflow environment around the ignition structure 111, so that the ignition structure 111 can accurately and smoothly form an initial fire core when igniting, thereby facilitating the ignition device 1 to perform an effective ignition operation.

[0036] like Figure 1-Figure 7 As shown, according to an embodiment of the present invention, an ignition device 1 for a zero-low carbon engine includes a spark plug 11 and a protective cover 12. It should be noted that the ignition device 1 in the present invention can be applied to an engine 100, and the ignition device 1 can be installed in the cylinder 2 of the engine 100. The ignition structure 111 is located in the combustion chamber and is used to ignite the mixed fuel in the combustion chamber to achieve the ignition process of the engine 100. In specific use, the cylinder 2 is provided with a fuel injector 6, and the fuel injector 6 is used to inject fuel into the combustion chamber. The fuel can be ammonia, natural gas, etc. At the same time, the engine 100 is also provided with an air intake 211 connected to the combustion chamber. The fuel and the air entering the air intake 211 can be mixed in the combustion chamber to form a combustible mixture.

[0037] The spark plug 11 is provided with an ignition structure 111. The spark plug 11 can be installed in the cylinder 2. The spark plug 11 can be detachably connected to the cylinder 2, so that the spark plug 11 can be flexibly installed and removed relative to the cylinder 2, that is, the spark plug 11 can be removed and replaced, which is convenient to use and helps to reduce the use cost. After the spark plug 11 is installed in the cylinder 2, the ignition structure 111 is located in the combustion chamber, and the ignition structure 111 can ignite the airflow formed by the fuel and air in the combustion chamber.

[0038] A protective cavity 121 is formed in the protective cover 12. The protective cover 12 is connected to the spark plug 11, and the ignition structure 111 is accommodated in the protective cavity 121. The protective cover 12 is provided with an ignition opening 122. The ignition opening 122 is used to connect the protective cavity 121 with the external space of the protective cover 12. The combustible mixture can enter the protective cavity 121 from the ignition opening 122 and gradually stabilize in the protective cavity 121. In other words, after the protective cover 12 is connected to the spark plug 11, it can play a protective shielding role for the ignition structure 111 of the spark plug 11, so that the ignition structure 111 can more easily realize the ignition function, and reduce the influence of the airflow around the ignition structure 111 on the airflow of the external space of the protective cover 12.

[0039] In the present invention, by setting the ignition opening 122, on the one hand, a necessary channel is provided for the fuel to flow into the protective cover 12 and form a combustible mixture near the spark plug 11; on the other hand, by adjusting the opening angle, size and other parameters, the direct interference and impact of the fuel injection on the spark plug discharge plate part can be reduced to a certain extent, and the disturbance of the combustion chamber environment on the flow and heat exchange process near the spark plug 11 is also reduced, which provides favorable conditions for the subsequent discharge ignition of the spark plug 11.

[0040] After the ignition device 1 is installed in the cylinder 2, the ignition structure 111 and the protective cover 12 are both located in the combustion chamber. Therefore, by arranging the ignition structure 111 in the protective cover 12, the airflow around the ignition structure 111 can be located in the protective cavity 121. In this way, when the fuel and air are mixed, the ignition structure 111 in the protective cover 12 and the airflow in the protective cavity 121 can be less affected by the combustible mixture under the protective effect of the protective cover 12, thereby helping to form an initial fire core at the ignition structure 111, and facilitating the growth of the initial fire core and the propagation of the flame, thereby greatly improving the combustion ignition stability and reliability, and ensuring the efficient and stable operation of the engine 100.

[0041] Therefore, the ignition device 1 for a zero-low-carbon engine in the present invention adopts a design combining a protective cover 12 with a spark plug 11, which can make full use of the advantages of the protective cover 12 such as simple structure, convenient installation and low price, as well as the characteristics of the spark plug 11 such as mature application and stable discharge, to improve the ignition performance of new zero-low-carbon fuels such as ammonia and natural gas. Compared with the existing diesel ignition (i.e. dual fuel) or traditional spark plug ignition technology, the ignition device 1 of the present invention has the advantages of low pollution emissions, high ignition stability and reliability, and good economy.

[0042] According to the ignition device 1 for a zero-low-carbon engine according to an embodiment of the present invention, the protective cover 12 is provided to protect the ignition structure 111 of the spark plug 11, so that the airflow state near the ignition structure 111 can be made relatively stable, that is, the disturbance of the combustible mixture formed by fuel and air to the ignition structure 111 can be reduced, which is beneficial for the ignition device 1 to accurately and reliably control the ignition timing and ensure the safe operation of the engine 100.

[0043] In some embodiments, the ignition structure 111 is located at the end of the spark plug 11, the protective cover 12 is sleeved on the outside of the spark plug 11 and a protective cavity 121 is formed at the end of the spark plug 11, so that one end of the spark plug 11 can be connected to the cylinder head 21 of the engine 100, the other end of the spark plug 11 is located in the combustion chamber and is provided with the ignition structure 111, and the protective cover 12 is covered outside the other end of the spark plug 11.

[0044] Specifically, Figure 1 As shown, the upper end of the spark plug 11 can be fixedly connected to the cylinder head 21 of the engine 100, and the lower end of the spark plug 11 extends into the combustion chamber. The protective cover 12 is located in the combustion chamber and the cover is arranged outside the ignition structure 111. Therefore, the protective cover 12 can effectively protect the ignition structure 111 of the spark plug 11, thereby ensuring smooth ignition.

[0045] Among them, the protective cover 12 can be constructed to have an open end, and the protective cover 12 is mounted on the outside of the spark plug 11 from the open end to form a protective cavity 121 at the end of the spark plug 11, thereby, the inner circumferential wall of the protective cover 12 can be fitted with the outer circumferential wall of the spark plug 11, that is, the shapes of at least some positions of the two can be constructed to be the same, and the installation method is simple, which helps to reduce the difficulty of setting.

[0046] In some embodiments, the ignition structure 111 includes a center electrode 112 and a side electrode 113, at least a portion of the side electrode 113 is spaced apart from the end surface of the spark plug 11 to jointly define an ignition space 116, and at least a portion of the center electrode 112 is located in the ignition space 116, thereby allowing the center electrode 112 and the side electrode 113 to perform an ignition action in the ignition space 116.

[0047] Among them, Figure 3and Figure 4 As shown, the center electrode 112 is disposed in the middle region of the end face of the spark plug 11, and the side electrode 113 extends downward from the end face of the spark plug 11 and is spaced apart from the center electrode 112, so as to form an ignition space 116 in the region therebetween. It should be noted that the combustible mixture in the combustion chamber can enter the protective cavity 121 from the ignition opening 122, and can enter the ignition space 116, so that when the center electrode 112 and the side electrode 113 ignite, the combustible mixture in the ignition space 116 can be accurately ignited, thereby achieving accurate ignition.

[0048] In some embodiments, the ignition opening 122 is provided on the side wall of the protective cover 12, and the ignition space 116 has an open side, which is open toward the ignition opening 122. This facilitates the combustible mixture in the ignition opening 122 to enter the ignition space 116. At the same time, after an initial fire core is formed in the ignition space 116, the initial fire core can be directly ignited from the open side and the ignition opening 122 into the combustion chamber, thereby ensuring that the ignition structure 111 quickly ignites the mixed fuel in the combustion chamber.

[0049] Specifically, Figure 2 As shown, the left side of the ignition space 116 is an open side, and the ignition opening 122 is provided on the left side wall of the protective cover 12 , that is, the ignition space 116 can be directly connected to the combustion chamber through the open side and the ignition opening 122 .

[0050] Among them, Figure 5 As shown, during the fuel injection stage, the combustible mixture in the combustion chamber can enter the protection chamber 121 from the ignition opening 122 to the right, and after entering the protection chamber 121, it can directly enter the ignition space 116 from the open side of the ignition space 116 to surround the center electrode 112 and the side electrode 113, and Figure 5 The shaded area in the middle is the flow direction of the fuel. Figure 6 As shown in FIG. 1 , when the center electrode 112 and the side electrode 113 ignite, the combustible mixture not only fills the ignition space 116, but also makes the entire ignition structure 111 in the combustible mixture, which can ensure that the main position where the center electrode 112 and the side electrode 113 ignite has the combustible mixture, and ensure that the combustible mixture is accurately ignited, and Figure 6 The shaded area is the combustible mixture surrounding the ignition structure 111. Figure 7 As shown, after the central electrode 112 and the side electrode 113 ignite, the combustible mixture burns and sprays toward the combustion chamber from the ignition opening 122, thereby achieving rapid ignition and Figure 7 The shaded area in the middle is an illustration of flame propagation.

[0051] As a result, not only can the combustible mixture formed by fuel and air enter the protective cavity 121 smoothly, but the protective cover 12 can also effectively protect the ignition structure 111. After the ignition forms a flame, the flame can directly and quickly spread to the combustion chamber, thereby realizing the overall ignition of the combustible mixture in the combustion chamber and improving the ignition efficiency.

[0052] In some embodiments, the side electrode 113 includes a first electrode segment 114 and a second electrode segment 115, wherein the first electrode segment 114 is connected to the end surface of the spark plug 11, the first electrode segment 114 extends along the axial direction of the spark plug 11, the second electrode segment 115 is bent and connected to the first electrode segment 114, and the second electrode segment 115 is extended toward the ignition opening 122. Therefore, after ignition, the flame can diffuse toward the ignition opening 122 under the guidance of the second electrode segment 115, thereby facilitating the flame to diffuse into the entire combustion chamber.

[0053] Specifically, Figure 2 As shown, the upper end of the first electrode segment 114 is connected to the lower end surface of the spark plug 11 and is separated from the center electrode 112, and the second electrode segment 115 is connected to the lower end of the first electrode segment 114 and extends to the left side to the bottom of the center electrode 112. At the same time, the ignition opening 122 is provided on the left side wall of the protective cover 12. Therefore, after the flame is ignited, the first electrode segment 114 can block the flame from spreading in the direction away from the ignition opening 122, and can flow to the left toward the ignition opening 122 under the guidance of the second electrode segment 115, so as to achieve rapid diffusion of the flame and improve the ignition efficiency.

[0054] In some embodiments, the protective cover 12 is further provided with a second opening 123, and the second opening 123 is separated from the ignition opening 122, that is, the second opening 123 and the ignition opening 122 can both connect the protective cavity 121 with the combustion chamber. Thus, after the ignition structure 111 is ignited, the generated flame can be diffused into the combustion chamber from the second opening 123 and the ignition opening 122 respectively, that is, the flame diffusion path is increased, which is conducive to igniting the combustible mixture in other areas of the combustion chamber and improving the ignition efficiency.

[0055] In a further embodiment, the ignition opening 122 is provided on the side wall of the protective cover 12, the second opening 123 is formed at the end of the protective cover 12, and the opening direction of the ignition opening 122 is perpendicular to the opening direction of the second opening 123. Thus, the flame formed in the protective cavity 121 can diffuse into the combustion chamber from two mutually perpendicular directions, which is beneficial to the rapid ignition of the combustible mixture in areas in different directions in the combustion chamber.

[0056] Specifically, Figure 6 As shown, the ignition opening 122 is provided on the left side wall of the protective cover 12, and the second opening 123 is formed at the lower end of the protective cover 12, so that the left side and the bottom of the protective cavity 121 are open, and then Figure 6 As shown, the flame in the protection cavity 121 can spread leftward and downward from the ignition opening 122 and the second opening 123 respectively, providing a fast channel for flame propagation, thereby igniting the entire combustion chamber.

[0057] In some embodiments, the protective cover 12 is detachably connected to the spark plug 11, so that the protective cover 12 can be flexibly installed on the spark plug 11, that is, the protective cover 12 can be flexibly removed and replaced relative to the spark plug 11, and then when the protective cover 12 or the spark plug 11 is structurally damaged, they can be replaced separately, which helps to reduce the cost of use.

[0058] The protective cover 12 can be detachably connected to the spark plug 11 by threaded fit, snap fit or other means.

[0059] Specifically, if an internal thread is provided on the inner circumferential wall of the protective cover 12 and an external thread is provided on the outer circumferential wall of the spark plug 11, after the protective cover 12 is sleeved on the spark plug 11, the internal thread and the external thread can be threadedly connected, thereby realizing detachable matching of the two.

[0060] The present invention also provides an engine 100 .

[0061] According to an embodiment of the present invention, the engine 100 comprises a cylinder 2, a fuel injector 6 and an ignition device 1 for a zero-low carbon engine of any one of the above-mentioned embodiments, a combustion chamber is formed in the cylinder 2, a spark plug 11 and a fuel injector 6 are both installed in the cylinder 2, an ignition structure 111 and a protective cover 12 are both located in the combustion chamber, an ignition opening 122 connects the protective cavity 121 with the combustion chamber, and the fuel injector 6 is used to inject fuel into the combustion chamber.

[0062] Specifically, Figure 1 As shown, a piston 3 is provided in the cylinder 2, and the piston 3 can move axially along the cylinder 2. At the same time, the piston 3 is connected to a connecting rod 4 and a crankshaft 5, so that the piston 3 can drive the connecting rod 4 and the crankshaft 5 to move during the movement. Among them, the cylinder 2 includes a cylinder head 21, and the cylinder head 21 is located at the top of the cylinder 2. A combustion chamber is formed between the cylinder head 21 and the piston 3. The cylinder head 21 is provided with an intake port 211 and an exhaust port 212. The fuel injector 6 is provided in the middle of the cylinder head 21, and the ignition plug is located on one side of the fuel injector 6, and the ignition opening 122 is open toward the fuel injector 6, so that the fuel injected by the fuel injector 6 can enter the protective cavity 121 from the ignition opening 122 for ignition.

[0063] Among them, by setting a protective cover 12 on the outside of the ignition structure 111, when a sufficient combustible mixture is formed in the protective cover 12, the spark plug 11 is controlled to discharge and ignite the combustible mixture to form an initial fire core. In this process, the protective cover 12 can gather part of the fuel after the fuel is injected, quickly form a combustible mixture near the spark plug 11, and keep the combustible mixture state before ignition, thereby increasing the reliability and stability of ignition and reducing the impact of airflow disturbance in the combustion chamber on the ignition structure 111. In addition, when zero-low-carbon fuels such as ammonia and natural gas are ignited, the initial fire core formed by them quickly ignites the remaining combustible mixture in the protective cover 12, and quickly propagates outward into the combustion chamber through the second opening 123 at the bottom of the protective cover 12 and the ignition opening 122 to complete the engine 100 cycle, provide power for the engine 100, and ensure that the flame propagates quickly in the combustion chamber to complete efficient combustion.

[0064] Therefore, the engine 100 in the present invention can achieve a stable and reliable ignition process through the ignition device 1 for a zero-low-carbon engine, and the specific ignition process is as follows:

[0065] First, during engine operation, the fuel injector 6 continuously injects a certain amount of fuel (ammonia, natural gas, etc.) around the ignition device 1 in the combustion chamber, wherein the injected fuel enters the interior of the protective cover 12 through the ignition opening 122 and mixes with the air to form a combustible mixture.

[0066] Furthermore, when sufficient combustible mixture is formed in the protective cover 12, the spark plug 11 is controlled to discharge and ignite the nearby combustible mixture to form an initial fire core. In this process, the protective cover 12 can gather part of the fuel after the fuel is injected, quickly form a combustible mixture near the spark plug 11, and keep the combustible mixture state before ignition, thereby increasing the reliability and stability of ignition. This design avoids the shortcomings of the traditional design that the combustible mixture state near the spark plug is variable and the ignition process is difficult to control due to the influence of the flow state in the combustion chamber.

[0067] And, after ignition is completed, the spark plug 11 is extinguished to avoid the spark plug 11 from working for a long time and causing the life to be shortened. At the same time, it is ensured that the spark plug 11 is used reliably in a cycle and is ready for the next engine start cycle.

[0068] At the same time, the initial fire core quickly ignites the remaining combustible mixture in the protective cover 12 to form a flame, which spreads rapidly and fills the protective cover 12. The flame inside the protective cover 12 quickly spreads outward into the combustion chamber through the second opening 123 and the ignition opening 122, fully ensuring the rapid propagation of the flame in the combustion chamber and achieving efficient combustion.

[0069] Finally, after the flame propagates into the combustion chamber, it quickly ignites the remaining combustibles in the direction of the swirl flow in the combustion chamber, ensuring reliable and rapid combustion, and causing a rapid increase in the pressure in the combustion chamber, pushing the piston to move, completing the engine cycle, and providing power for the engine. In this way, the fuel can be fully burned, thereby reducing fuel waste.

[0070] The invention also provides an operating device.

[0071] The operating device according to the embodiment of the present invention includes the engine 100 of the above embodiment. The engine 100 can perform an accurate and reliable ignition process and has a stable ignition state, thereby ensuring the safe operation of the operating device.

[0072] It should be noted that the operating equipment may be ships, vehicles, general aviation aircraft, etc., and can be applied in a variety of different fields.

[0073] 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.

[0074] 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 ignition device for a zero-low carbon engine, characterized in that: include: A spark plug, wherein the spark plug is provided with an ignition structure; A protective cover is formed with a protective cavity, the protective cover is connected to the spark plug, and the ignition structure is accommodated in the protective cavity. The protective cover is provided with an ignition opening, and the ignition opening is used to connect the protective cavity with the external space of the protective cover.

2. The ignition device for a zero-low-carbon engine according to claim 1, characterized in that: The ignition structure is located at the end of the spark plug, the protective cover is sleeved outside the spark plug and the protective cavity is formed at the end of the spark plug.

3. The ignition device for a zero-low-carbon engine according to claim 2, characterized in that: The ignition structure includes a center electrode and a side electrode, at least a portion of the side electrode is spaced apart from an end surface of the spark plug to jointly define an ignition space, and at least a portion of the center electrode is located within the ignition space.

4. The ignition device for a zero-low-carbon engine according to claim 3, characterized in that: The ignition opening is provided on a side wall of the protective cover, and the ignition space has an open side, which is open toward the ignition opening.

5. The ignition device for a zero-low-carbon engine according to claim 4, characterized in that: The side electrode comprises a first electrode segment and a second electrode segment; The first electrode segment is connected to the end surface of the spark plug, the first electrode segment extends along the axial direction of the spark plug, the second electrode segment is bent and connected to the first electrode segment, and the second electrode segment extends toward the ignition opening.

6. The ignition device for a zero-low-carbon engine according to claim 1, characterized in that: The protective cover also defines a second opening that is spaced apart from the ignition opening.

7. The ignition device for a zero-low-carbon engine according to claim 6, characterized in that: The ignition opening is arranged on the side wall of the protective cover, the second opening is formed at the end of the protective cover, and the opening direction of the ignition opening is perpendicular to the opening direction of the second opening.

8. The ignition device for a zero-low carbon engine according to claim 1, characterized in that: The protective cover is detachably connected to the spark plug.

9. An engine, characterized in that: It comprises a cylinder, a fuel injector and an ignition device for a zero-low carbon engine as described in any one of claims 1-8, wherein a combustion chamber is formed in the cylinder, the spark plug and the fuel injector are both installed in the cylinder, the ignition structure and the protective cover are both located in the combustion chamber, the ignition opening connects the protective cavity with the combustion chamber, and the fuel injector is used to inject fuel into the combustion chamber.

10. An operating device, characterized in that: Comprising the engine as claimed in claim 9.

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