Injection mechanism, ignition device, engine system and control method of engine system

Abstract

The invention discloses an injection mechanism, an ignition device, an engine system and a control method of the engine system, and belongs to the technical field of engines. According to the injection mechanism, the ignition device, the engine system and the control method of the injection mechanism, when the engine is in different working conditions, the multiple blades can be controlled to be linked with the rotating disc, the states of the multiple blades are switched, the states of the multiple blades are different, and then the jet flow distribution range and the jet flow speed of the injection mechanism are flexibly controlled; the injection mechanism has good performance under different working conditions of the engine, the combustion requirements under low-load and high-load working conditions can be met, the adjustment requirements under different rotating speed conditions can be met, the stability and controllability of the combustion process are greatly improved, the combustion efficiency can be remarkably improved, and the service life of the engine is prolonged. Incomplete combustion is reduced, emission of harmful gas is effectively reduced, and the environment-friendly requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and particularly to an injection mechanism, an ignition device, an engine system and a control method thereof. Background Art

[0002] As the core power source of modern transportation vehicles and industrial equipment, the performance and combustion efficiency of engines directly affect energy consumption and emission levels. With the increasing global requirements for environmental protection, reducing engine emissions and improving combustion efficiency have become important goals in the development of combustion technology.

[0003] In recent years, the pre-chamber jet ignition technology has been recognized as one of the important technical means to break through the bottleneck of engine efficiency. The pre-chamber jet ignition system is a new type of engine ignition system. First, the spark plug discharges to ignite the mixture in the pre-chamber, and then under the action of the pressure difference, the high-temperature combustion substances, unburned / incompletely burned components, etc. in the pre-chamber are quickly sprayed into the main combustion chamber through the pre-chamber jet holes, forming a high-speed jet, and then the fuel in the main combustion chamber is ignited.

[0004] Compared with traditional spark ignition engines, pre-chamber jet ignition engines can greatly expand the lean combustion limit of engines, significantly improve the thermal efficiency of engines while reducing NOx emissions. However, the current pre-chamber jet ignition system adopts a fixed orifice design, that is, the number and diameter of the orifices are fixed values. Once the engine is assembled, the number and diameter of the orifices will not change. Although this design can provide basic ignition performance under certain conditions, in the complex actual working environment of the engine, such as engine load changes, speed fluctuations, etc., the fixed orifice design cannot respond flexibly, easily leading to unstable ignition, incomplete combustion or increased emissions, and cannot maximize the combustion efficiency and reduce emissions. Summary of the Invention

[0005] The purpose of the present invention is to provide an injection mechanism, an ignition device, an engine system and a control method thereof, which can optimize the combustion process, improve ignition stability and increase combustion efficiency.

[0006] To achieve the above object, the following technical solutions are provided:

[0007] An injection mechanism, comprising:

[0008] A mounting seat, the mounting seat is provided with a first through hole;

[0009] A turntable, the turntable is rotatably arranged on the mounting seat around the axis of the first through hole, an installation cavity is provided between the turntable and the mounting seat, and the turntable is further provided with a second through hole corresponding to the first through hole;

[0010] Multiple blades, and a plurality of the blades are sequentially arranged in the installation cavity along the rotation direction of the turntable. The blades are provided with leaf spray holes. The blades are connected to the turntable through a first connection structure, and the blades are connected to the mounting seat through a second connection structure. The plurality of blades can be linked with the turntable to switch between a closed state and a fully open state;

[0011] In the closed state, there are no gaps between the plurality of blades, and the first through hole and the second through hole are communicated through the leaf spray holes of the plurality of blades;

[0012] In the fully open state, a first central spray hole is formed between the plurality of blades, and the leaf spray holes of the plurality of blades are all closed. The first through hole and the second through hole are communicated through the first central spray hole.

[0013] As a preferred technical solution of the above spraying mechanism, the plurality of blades can be linked with the turntable to switch between the closed state, the semi-open state and the fully open state;

[0014] In the semi-open state, a second central spray hole is formed between the plurality of blades. The cross-sectional area of the first central spray hole is larger than the cross-sectional area of the second central spray hole, and the first through hole and the second through hole are communicated through the second central spray hole and the leaf spray holes of the plurality of blades.

[0015] As a preferred technical solution of the above spraying mechanism, the first connection structure includes a connection shaft fixed to the blade and a connection groove formed in the turntable. The connection shaft is inserted into the connection groove. The connection shaft can move radially along the turntable in the connection groove, and the connection shaft can rotate in the connection groove;

[0016] The second connection structure includes a slider fixed to the blade and a chute formed in the mounting seat. The slider is inserted into the chute. The slider can move in the chute along a direction perpendicular to the moving direction of the connection shaft in the connection groove, and the slider cannot rotate in the chute.

[0017] As a preferred technical solution of the above spraying mechanism, the axis of the leaf spray hole is arranged at an angle to the axis of the first through hole.

[0018] As a preferred technical solution of the above spraying mechanism, the spraying direction of the leaf spray hole is inclined from the direction of the first through hole to the second through hole away from the axis of the first through hole.

[0019] As a preferred technical solution of the above-mentioned injection mechanism, the injection mechanism further includes a cover body, the cover body is rotatably connected to the turntable, the cover body and the mounting seat are respectively located on both sides of the turntable along its axial direction, and the cover body is provided with a third through hole corresponding to the second through hole.

[0020] As a preferred technical solution of the above-mentioned injection mechanism, the inner wall of the installation cavity is provided with an exhaust hole.

[0021] To achieve the above object, an ignition device is further provided, including:

[0022] A pre-combustion housing, the pre-combustion housing is provided with a pre-combustion chamber and an ignition hole communicating with the pre-combustion chamber;

[0023] The injection mechanism according to any one of the preceding claims, the mounting seat is fixedly connected to the pre-combustion housing, and the first through hole is arranged opposite to the ignition hole;

[0024] A driving mechanism, the driving mechanism is used to drive the turntable to rotate.

[0025] As a preferred technical solution of the above-mentioned ignition device, the driving mechanism includes a driven gear, a transmission gear unit and a driving member, the driving member is used to drive the gear of the transmission gear unit to rotate, and the driven gear meshes with the gear of the transmission gear unit.

[0026] As a preferred technical solution of the above-mentioned ignition device, the ignition device further includes:

[0027] A fuel injector, the fuel injector is used to inject fuel into the pre-combustion chamber,

[0028] An igniter, the igniter is used to ignite the fuel in the pre-combustion chamber.

[0029] To achieve the above object, an engine system is further provided, including an engine and the ignition device according to any one of the preceding claims, the engine includes a main combustion chamber, and the main combustion chamber is communicated with the pre-combustion chamber through the spray hole of the injection mechanism.

[0030] To achieve the above object, an engine system control method is further provided, which is applied to the engine system as described above; the engine system control method includes the following steps:

[0031] Obtain the current working condition of the engine;

[0032] According to the obtained current working condition of the engine, the driving mechanism is used to drive the turntable to rotate, so that the plurality of blades can be linked with the turntable and switch states.

[0033] As a preferred technical solution of the above engine system control method, according to the obtained current working condition of the engine, the driving mechanism is made to drive the rotating disc to rotate, so that the plurality of blades can be linked with the rotating disc and switch states, including the following steps:

[0034] The current working condition of the engine includes a first working condition and a second working condition;

[0035] If the engine is in the first working condition, the driving mechanism is made to drive the rotating disc to rotate, so that the plurality of blades are linked with the rotating disc and switched to the fully open state;

[0036] If the engine is in the second working condition, the driving mechanism is made to drive the rotating disc to rotate, so that the plurality of blades are linked with the rotating disc and switched to a state between the closed state and the fully open state;

[0037] If the engine is not in the first working condition and the engine is not in the second working condition, the driving mechanism is made to drive the rotating disc to rotate, so that the plurality of blades are linked with the rotating disc and switched to the closed state.

[0038] Compared with the prior art, the beneficial effects of the present invention are:

[0039] For the injection mechanism and ignition device of the present invention, by rotating the rotating disc, the plurality of blades can be linked with the rotating disc, so that the plurality of blades can be switched between the closed state and the fully open state; in the closed state, there is no gap between the plurality of blades, and the first through hole and the second through hole are communicated through the leaf injection holes of the plurality of blades; in the fully open state, a first central injection hole is formed between the plurality of blades, and the leaf injection holes of the plurality of blades are all closed, and the first through hole and the second through hole are communicated through the first central injection hole, so that the jet distribution range and jet velocity of the injection mechanism can be flexibly controlled, thereby achieving the purpose of optimizing the engine combustion process, improving ignition stability, and increasing combustion efficiency.

[0040] The injection mechanism and ignition device of the present invention also have strong adaptability and can be widely applied to various types of engine systems, especially high-performance and environmentally friendly engine systems.

[0041] The engine system of the present invention, by applying the above-mentioned injection mechanism, can control the linkage and switching states of multiple blades and the turntable when the engine is in different working conditions, so that the states of the multiple blades are also different, and then flexibly control the jet distribution range and jet speed of the injection mechanism, so that the engine has good performance under different working conditions of the injection mechanism, which can not only meet the combustion requirements under low load and high load conditions, but also adapt to the adjustment requirements under different speed conditions, greatly improving the stability and controllability of the combustion process, and then significantly improving the combustion efficiency, reducing incomplete combustion and effectively reducing the emission of harmful gases, and meeting environmental protection needs.

[0042] The engine system control method of the present invention controls the linkage and switching states of multiple blades and the turntable according to the current working conditions of the engine, so that the states of the multiple blades are different when the engine is in different working conditions, and then flexibly controls the jet distribution range and jet speed of the injection mechanism, so that the injection mechanism has good performance under different working conditions of the engine, which can not only meet the combustion requirements under low-load and high-load conditions, but also adapt to the adjustment requirements under different speed conditions, greatly improving the stability and controllability of the combustion process, and then significantly improving the combustion efficiency, reducing incomplete combustion and effectively reducing the emission of harmful gases, thereby meeting environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic structural diagram of an ignition device in an embodiment of the present invention;

[0044] Figure 2 is a cross-sectional view of the injection mechanism in an embodiment of the present invention;

[0045] Figure 3 This is a first structural diagram of the injection mechanism in an embodiment of the present invention;

[0046] Figure 4 This is a second structural schematic diagram of the injection mechanism in an embodiment of the present invention;

[0047] Figure 5 This is a first explosion schematic diagram of the injection mechanism in an embodiment of the present invention;

[0048] Figure 6 This is a second explosion diagram of the injection mechanism in an embodiment of the present invention;

[0049] Figure 7 2 is a first structural schematic diagram of the injection mechanism when multiple blades are in a closed state in an embodiment of the present invention;

[0050] Figure 8 2 is a first structural schematic diagram of the injection mechanism when multiple blades are in a closed state in an embodiment of the present invention;

[0051] Figure 9 This is the first schematic structural view of the injection mechanism when multiple blades are in the semi-open state in the embodiments of the present invention;

[0052] Figure 10 This is the first schematic structural view of the injection mechanism when multiple blades are in the semi-open state in the embodiments of the present invention;

[0053] Figure 11 This is the first schematic structural view of the injection mechanism when multiple blades are in the fully open state in the embodiments of the present invention;

[0054] Figure 12 This is the first schematic structural view of the injection mechanism when multiple blades are in the fully open state in the embodiments of the present invention;

[0055] Figure 13 This is the flow chart of the engine system control method in the embodiments of the present invention.

[0056] Reference numerals:

[0057] 1. Pre-combustion housing; 11. Pre-combustion chamber; 12. Ignition hole; 13. Base; 14. Pre-combustion chamber outer shell; 15. Fastening sleeve;

[0058] 2. Injection mechanism; 21. Mounting seat; 211. First through hole; 212. Chute; 213. First tapered hole; 22. Turntable; 221. Mounting cavity; 222. Second through hole; 223. Connecting groove; 224. Exhaust hole; 225. Step groove; 23. Blade; 2311. Blade spray hole; 2312. First central spray hole; 2313. Second central spray hole; 232. Connecting shaft; 233. Slide block; 24. Cover body; 241. Third through hole; 242. Second tapered hole;

[0059] 3. Fuel injector; 4. Igniter; 5. Driven gear. Detailed implementation manners

[0060] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0061] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0062] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

[0063] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is 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 thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0064] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "arranged" 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. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0066] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0067] As Figures 1 to 12As shown in the figure, this embodiment provides an injection mechanism, an ignition device, and an engine system. The engine system includes an engine and an ignition device. The ignition device includes a pre-combustion housing 1 and an injection mechanism 2. The pre-combustion housing 1 is provided with a pre-combustion chamber 11 and an ignition hole 12 communicating with the pre-combustion chamber 11. The injection mechanism 2 is arranged at the ignition hole 12. The engine includes a main combustion chamber, and the main combustion chamber is communicated with the pre-combustion chamber 11 through the injection holes of the injection mechanism 2.

[0068] Specifically, the ignition device further includes a fuel injector 3 and an igniter 4. The fuel injector 3 is used to inject fuel into the pre-combustion chamber 11, and the igniter 4 is used to ignite the fuel in the pre-combustion chamber 11. The injection mechanism 2 is used to inject high-temperature combustion substances, unburned / incompletely burned components, etc. in the pre-combustion chamber 11 into the main combustion chamber to ignite the fuel in the main combustion chamber.

[0069] The injection mechanism 2 includes a mounting seat 21, a turntable 22, and a plurality of blades 23. The mounting seat 21 is fixedly connected to the pre-combustion housing 1. The mounting seat 21 is provided with a first through hole 211, and the first through hole 211 is disposed opposite to the ignition hole 12. In other words, the first through hole 211 communicates with the ignition hole 12. The turntable 22 is rotatably arranged on the mounting seat 21 around the axis of the first through hole 211. An installation cavity 221 is provided between the turntable 22 and the mounting seat 21. The turntable 22 is further provided with a second through hole 222 corresponding to the first through hole 211. The plurality of blades 23 are sequentially arranged in the installation cavity 221 along the rotation direction of the turntable 22. The blade 23 is provided with a blade injection hole 2311. The blade 23 is connected to the turntable 22 through a first connection structure, and the blade 23 is connected to the mounting seat 21 through a second connection structure. The plurality of blades 23 can be linked with the turntable 22 to switch between a closed state and a fully open state. In the closed state, there is no gap between the plurality of blades 23, and the first through hole 211 communicates with the second through hole 222 through the blade injection holes 2311 of the plurality of blades 23. In the fully open state, a first central injection hole 2312 is formed between the plurality of blades 23, and the blade injection holes 2311 of the plurality of blades 23 are all closed. The first through hole 211 communicates with the second through hole 222 through the first central injection hole 2312. Specifically, in the fully open state, the blade injection holes 2311 of the plurality of blades 23 are all covered and closed by the inner wall of the installation cavity 221.

[0070] In the injection mechanism 2 and the ignition device of this embodiment, by rotating the turntable 22, the plurality of blades 23 can be linked with the turntable 22, so that the plurality of blades 23 can switch between the closed state and the fully open state, and thus the jet distribution range and jet velocity of the injection mechanism 2 can be flexibly controlled, so as to optimize the engine combustion process, improve ignition stability, and improve combustion efficiency. The injection mechanism 2 and the ignition device of the present invention also have strong adaptability and can be widely applied to various types of engine systems, especially high-performance and environmentally friendly engine systems.

[0071] It should be noted that when the turntable 22 rotates, the multiple vanes 23 can be linked with the turntable 22 and switch states. Specifically, when the turntable 22 rotates, the multiple vanes 23 can switch to the closed state, can also switch to the fully open state, and can also switch to any state between the closed state and the fully open state, such as the semi-open state. That is to say, the multiple vanes 23 can be linked with the turntable 22 to switch between the closed state, the semi-open state and the fully open state; in the semi-open state, a second central spray hole 2313 is formed between the multiple vanes 23, and the cross-sectional area of the first central spray hole 2312 is larger than the cross-sectional area of the second central spray hole 2313, and the first through hole 211 and the second through hole 222 are communicated through the second central spray hole 2313 and the leaf spray holes 2311 of the multiple vanes 23.

[0072] That is to say, when the multiple vanes 23 are in different states, the number of spray holes formed by the spraying mechanism 2 and the effective flow-through area of the spray holes formed by the spraying mechanism 2 are different. As Figures 5 to 8 shown, when the multiple vanes 23 are in the closed state, the number of spray holes formed by the spraying mechanism 2 is equal to the number of leaf spray holes 2311 on the multiple vanes 23; the effective flow-through area of the spray holes formed by the spraying mechanism 2 is equal to the sum of the cross-sectional areas of the leaf spray holes 2311 on the multiple vanes 23; the cross-section of the leaf spray hole 2311 is a section perpendicular to the axis of the leaf spray hole 2311.

[0073] As Figure 5 、 Figure 6 、 Figure 9 and Figure 10 shown, when the multiple vanes 23 are in the semi-open state, the number of spray holes formed by the spraying mechanism 2 is equal to the sum of the number of leaf spray holes 2311 on the multiple vanes 23 and the number of second central spray holes 2313. The number of second central spray holes 2313 is one. In other words, the number of spray holes formed by the spraying mechanism 2 = the number of leaf spray holes 2311 on the multiple vanes 23 + 1; the effective flow-through area of the spray holes formed by the spraying mechanism 2 is equal to the sum of the cross-sectional areas of the leaf spray holes 2311 on the multiple vanes 23 and the cross-sectional area of the second central spray hole 2313; the cross-section of the second central spray hole 2313 is a section perpendicular to the axis of the second central spray hole 2313.

[0074] As Figure 5 、 Figure 6 、 Figure 11 and Figure 12 shown, when the multiple vanes 23 are in the fully open state, the number of spray holes formed by the spraying mechanism 2 is one, that is, the first central spray hole 2312; the effective flow-through area of the spray holes formed by the spraying mechanism 2 is equal to the cross-sectional area of the first central spray hole 2312; the cross-section of the first central spray hole 2312 is a section perpendicular to the axis of the first central spray hole 2312.

[0075] As Figure 5 and Figure 6 shown, optionally, the first connection structure includes a connection shaft 232 fixedly provided on the blade 23 and a connection groove 223 formed in the turntable 22. The connection shaft 232 is inserted into the connection groove 223. The connection shaft 232 can move radially along the turntable 22 in the connection groove 223 and can rotate in the connection groove 223. The second connection structure includes a slider 233 fixedly provided on the blade 23 and a chute 212 formed in the mounting seat 21. The slider 233 is inserted into the chute 212. The slider 233 can move in the chute 212 along a direction perpendicular to the moving direction of the connection shaft 232 in the connection groove 223, and the slider 233 cannot rotate in the chute 212.

[0076] Optionally, the axis of the leaf spray hole 2311 is arranged at an angle with the axis of the first through hole 211. Furthermore, the spraying directions of the leaf spray holes 2311 of the plurality of blades 23 can be made different, and the jet distribution range of the spraying mechanism 2 can be changed, so as to achieve the purpose of improving the ignition stability and combustion efficiency.

[0077] Preferably, the spraying direction of the leaf spray hole 2311 is inclined away from the axis of the first through hole 211 in the direction from the first through hole 211 to the second through hole 222. Furthermore, the jet distribution range of the spraying mechanism 2 can be increased. It can not only achieve simultaneous ignition in a large range, but also improve the ignition energy, and the flame propagation speed is fast. It can expand the lean combustion limit and has great potential for improving the thermal efficiency.

[0078] Optionally, exhaust holes 224 are provided on the inner wall of the installation cavity 221 for exhausting and admitting air when the blade 23 rotates, thereby avoiding the generation of negative pressure between the blade 23 and the inner wall of the installation cavity 221 and affecting the rotation of the blade 23. It should be noted that a lubricant is provided in the installation cavity 221 to lubricate the rotation of the blade 23. During the rotation of the blade 23, the lubricant will also fill into the exhaust holes 224 to avoid the generation of negative pressure between the blade 23 and the inner wall of the installation cavity 221 and affecting the rotation of the blade 23. Specifically, six exhaust holes 224 are provided, and the six exhaust holes 224 are evenly distributed along the rotation direction of the turntable 22.

[0079] The ignition device of this embodiment further includes a driving mechanism for driving the turntable 22 to rotate, thereby facilitating the control of the rotation of the turntable 22.

[0080] Optionally, the drive mechanism includes a driven gear 5 and a drive unit. The driven gear 5 is sleeved outside the turntable 22, and the drive unit is used to drive the driven gear 5 to rotate, thereby driving the turntable 22 to rotate. This is not only convenient for assembly, but also can improve the rotation control accuracy of the turntable 22, and further can more precisely adjust the states of the plurality of blades 23, which is beneficial to further improve the ignition stability and combustion efficiency. Exemplarily, the tooth profile of the driven gear 5 is an external involute tooth. Of course, in other embodiments, external involute teeth can also be directly provided on the outer peripheral side of the turntable 22.

[0081] Optionally, the drive unit includes a driving gear and a driving member. The driving gear is fixedly provided at the driving end of the driving member. The driving member drives the driving gear to rotate, the driving gear drives the driven gear 5 to rotate, and the driven gear 5 drives the turntable 22 to rotate. Of course, a transmission gear can also be provided between the driving gear and the driven gear 5 to form a speed reduction mechanism, which is beneficial to improving the rotation control accuracy of the turntable 22. Optionally, the number of transmission gears can be one, two, three, or even more, which is not limited herein. Exemplarily, the driving member is a motor.

[0082] Optionally, the injection mechanism 2 further includes a cover body 24. The cover body 24 is rotatably connected to the turntable 22. The cover body 24 and the mounting seat 21 are respectively located on both sides of the turntable 22 along its axial direction. The cover body 24 is provided with a third through hole 241 corresponding to the second through hole 222. When assembling the injection mechanism 2 with the engine, the cover body 24 is fixedly connected to the engine, thereby facilitating the turntable 22 and the drive mechanism for driving the turntable 22 to rotate to be located outside the engine, avoiding the influence of the high temperature generated by the engine operation on the drive mechanism, and being beneficial to improving the reliability and service life of the drive mechanism.

[0083] Preferably, the axes of the ignition holes 12, the first through hole 211, the second through hole 222, and the third through hole 241 coincide, which is beneficial to making the jet fluid formed by the high-temperature combustion substances, unburned / partially burned components, etc. in the pre-chamber 11 flow into the main combustion chamber more smoothly and quickly.

[0084] Specifically, the exhaust hole 224 is a through hole axially penetrating through the turntable 22. That is to say, one end of the exhaust hole 224 communicates with the installation cavity 221, and the other end is closed by the cover body 24, which can improve the smoothness of the rotation of the turntable 22.

[0085] Optionally, the mounting seat 21 is provided with a first flow guiding structure, and the first flow guiding structure can guide the fluid ejected from the ignition holes 12 into the first through hole 211, which is beneficial to improving the flow smoothness of the jet formed by the high-temperature combustion substances, unburned / partially burned components, etc. in the pre-chamber 11.

[0086] Specifically, the first flow guiding structure is a first tapered hole 213 provided at one end of the first through hole 211 close to the ignition hole 12 along its axial direction. Along the fluid flow direction (i.e., along the axial direction of the first through hole 211 from the pre - combustion chamber 11 to the main combustion chamber), the inner diameter of the first tapered hole 213 gradually decreases.

[0087] Optionally, the cover body 24 is provided with a second flow guiding structure, which can guide the fluid ejected from the third through hole 241 into the main combustion chamber, facilitating the improvement of the flow smoothness of the jet formed by the high - temperature combustion substances, unburned / incompletely burned components, etc. in the pre - combustion chamber 11.

[0088] Specifically, the second flow guiding structure is a second tapered hole 242 provided at one end of the third through hole 241 far from the second through hole 222 along its axial direction. Along the fluid flow direction (i.e., along the axial direction of the third through hole 241 from the pre - combustion chamber 11 to the main combustion chamber), the inner diameter of the second tapered hole 242 gradually increases.

[0089] Optionally, both the fuel injector 3 and the igniter 4 are fixedly connected to the pre - combustion housing 1 by means of threaded connection. Specifically, the pre - combustion housing 1 includes a base 13, a pre - combustion outer housing 14, and a fastening sleeve 15. The fastening sleeve 15 fixedly connects the pre - combustion outer housing 14 to the base 13. A pre - combustion chamber 11 is formed between the pre - combustion outer housing 14 and the base 13. Both the fuel injector 3 and the igniter 4 are fixedly arranged on the base 13 by means of threaded connection, and the nozzle of the fuel injector 3 and the ignition part of the igniter 4 are both located in the pre - combustion chamber 11. Further, the fastening sleeve 15 surrounds the outside of the fuel injector 3 and the igniter 4, and thus can further improve the installation stability of the fuel injector 3 and the igniter 4 through the fastening sleeve 15. Further, the mounting seat 21 is fixedly connected to the pre - combustion housing 1 by means of interference fit or by fasteners such as bolts.

[0090] Specifically, as Figure 6 shown, one side of the turntable 22 along its axial direction is provided with a stepped groove 225. One end of the mounting seat 21 is arranged in the stepped groove 225 and abuts against the step surface of the stepped groove 225, and the other end is located outside the stepped groove 225 and is used for fixedly connecting with the pre - combustion housing 1. An installation cavity 221 is formed between one end of the mounting seat 21 located in the stepped groove 225 and the inner wall of the stepped groove 225. Further, one end of the mounting seat 21 located outside the stepped groove 225 is provided with a chamfer, which can disperse and reduce stress concentration and facilitate assembly.

[0091] In this embodiment, as Figures 1 to 6 shown, the blade 23 is a triangular blade, and there are six blades 23. The six triangular blades are evenly distributed along the rotation direction of the turntable 22. That is to say, the angle between any triangular blade and the two sides in contact with its adjacent two triangular blades is 30°.

[0092] Further, the turntable 22 is provided with six connecting grooves 223. The connecting grooves 223 are long strip-shaped grooves extending along the radial direction of the turntable 22. The six connecting grooves 223 are evenly distributed along the rotation direction of the turntable 22. In other words, the included angle between the centerlines of the six long strip-shaped grooves is 30°. The connecting shafts 232 of the six triangular blades are respectively inserted into the six connecting grooves 223 in a one-to-one correspondence.

[0093] Further, the sliding groove 212 is a hexagonal groove; the slider 233 is a rectangular block. Specifically, the hexagonal groove includes six sub-grooves. The six sub-grooves are connected end to end in sequence along the rotation direction of the turntable 22 and form a regular hexagonal structure. The sliders 233 of the six triangular blades are respectively arranged in the six sub-grooves. When the blade 23 is linked with the turntable 22, the slider 233 can move in the corresponding sub-groove. Specifically, the six long strip-shaped grooves and the six sub-grooves are arranged in a one-to-one correspondence, and the centerline of the long strip-shaped groove is perpendicular to the centerline of the corresponding sub-groove.

[0094] For the convenience of description, the three sides of the triangular blade are respectively denoted as the mounting side and two sealing sides. The two sealing sides of any triangular blade are respectively abutted against the sealing sides of the adjacent triangular blades, and the mounting side is connected between the two sealing sides. Specifically, the triangular blade is an isosceles triangle, the two sealing sides are the waists of the isosceles triangle, and the mounting side is the base of the isosceles triangle. Specifically, the connecting shaft 232 and the slider 233 are respectively located on the opposite sides of the triangular blade, and both the connecting shaft 232 and the slider 233 are arranged at the middle of the mounting side. In other words, both the connecting shaft 232 and the slider 233 are located on the perpendicular bisector of the mounting side.

[0095] As Figures 5 to 8 shown, when the six triangular blades are in the closed state, none of the six triangular blades rotates, and the slider 233 is located at the center of the corresponding sub-groove (that is, the distances between the slider 233 and the two ends of the corresponding sub-groove are equal). At this time, there is no gap between any two triangular blades, and the number of spray holes formed by the spraying mechanism 2 is six, that is, six leaf spray holes 2311. The high-temperature combustion substances, unburned / incompletely burned components, etc. in the pre-combustion chamber 11 form a jet fluid that can only be injected into the main combustion chamber through the six leaf spray holes 2311.

[0096] As Figure 5 、 Figure 6 、 Figure 9 and Figure 10As shown, when the six triangular vanes are in the semi-open state, compared with when the six triangular vanes are in the closed state, the angle by which the triangular vanes rotate along the rotation direction of the turntable 22 is greater than 0° and not greater than 23.5°, and the slider 233 slides from the center of the corresponding sub-groove towards one end of the two ends of the sub-groove. At this time, the number of spray holes formed by the injection mechanism 2 is seven, namely the second central spray hole 2313 and the six vane spray holes 2311. The jet fluid formed by the high-temperature combustion substances, unburned / partially burned components, etc. in the pre-chamber 11 is then injected into the main combustion chamber through the second central spray hole 2313 and the six vane spray holes 2311.

[0097] As Figure 5 , Figure 6 , Figure 11 and Figure 12 As shown, when the six triangular vanes are in the fully open state, compared with when the six triangular vanes are in the closed state, the angle by which the triangular vanes rotate along the rotation direction of the turntable 22 is greater than 23.5° and not greater than 30°; compared with when the six triangular vanes are in the semi-open state, the slider 233 is closer to or reaches the end of the sub-groove. At this time, the number of spray holes formed by the injection mechanism 2 is one, namely the first central spray hole 2312. The jet fluid formed by the high-temperature combustion substances, unburned / partially burned components, etc. in the pre-chamber 11 will only be injected into the main combustion chamber through the first central spray hole 2312.

[0098] For the engine system of this embodiment, by applying the above injection mechanism 2, when the engine is in different working conditions, it can control the linkage of multiple vanes 23 with the turntable 22 and switch states, so that the states of the multiple vanes 23 are also different, and then flexibly control the jet distribution range and jet velocity of the injection mechanism 2, enabling the injection mechanism 2 to have good performance under different working conditions of the engine. It can not only meet the combustion requirements under low-load and high-load conditions, but also adapt to the adjustment requirements under different rotational speed conditions, greatly improving the stability and controllability of the combustion process, and then significantly enhancing the combustion efficiency, reducing incomplete combustion and effectively reducing the emission of harmful gases, meeting the environmental protection requirements.

[0099] As Figure 13 shown, this embodiment also provides an engine system control method, which is applied to the engine system as described above; the engine system control method includes the following steps:

[0100] S1. Obtain the current working condition of the engine;

[0101] S2. According to the obtained current working condition of the engine, make the driving mechanism drive the turntable 22 to rotate, so that multiple vanes 23 can be linked with the turntable 22 and switch states.

[0102] It can be understood that when the engine is in different working conditions, the load and rotational speed of the engine are also different.

[0103] The engine system control method of the present invention controls a plurality of blades 23 to be linked with the turntable 22 and switch states according to the current working condition of the engine, so that when the engine is in different working conditions, the states of the plurality of blades 23 are also different, thereby flexibly controlling the jet distribution range and jet velocity of the injection mechanism 2, realizing that the injection mechanism 2 has good performance under different working conditions of the engine, not only can meet the combustion requirements under low load and high load conditions, but also can adapt to the adjustment requirements under different rotational speed conditions, greatly improving the stability and controllability of the combustion process, and then being able to significantly improve the combustion efficiency, reduce incomplete combustion and effectively reduce the emission of harmful gases, meeting the environmental protection requirements.

[0104] Optionally, according to the obtained current working condition of the engine, the driving mechanism is made to drive the turntable 22 to rotate, so that a plurality of blades 23 can be linked with the turntable 22 and switch states, including the following steps:

[0105] The current working condition of the engine includes a first working condition and a second working condition;

[0106] If the engine is in the first working condition, the driving mechanism is made to drive the turntable 22 to rotate, so that a plurality of blades 23 are linked with the turntable 22 and switched to the fully open state;

[0107] If the engine is in the second working condition, the driving mechanism is made to drive the turntable 22 to rotate, so that a plurality of blades 23 are linked with the turntable 22 and switched to a state between the closed state and the fully open state;

[0108] If the engine is not in the first working condition and the engine is not in the second working condition, the driving mechanism is made to drive the turntable 22 to rotate, so that a plurality of blades 23 are linked with the turntable 22 and switched to the closed state.

[0109] Exemplarily, the first working condition includes a cold start working condition and an idle working condition; the second working condition includes a high load working condition such as a low speed and high load working condition.

[0110] That is to say, when the engine is in the cold start working condition or the idle working condition, the driving mechanism is made to drive the turntable 22 to rotate, so that a plurality of blades 23 are linked with the turntable 22 and switched to the fully open state. At this time, the leaf jet holes 2311 of the plurality of blades 23 are all closed, and the pre-chamber 11 is communicated with the main combustion chamber through the first central jet hole 2312. The cross-sectional area of the first central jet hole 2312 is relatively large, which is equivalent to reducing the number of jet holes formed by the injection mechanism 2 and increasing the effective flow area of the jet holes formed by the injection mechanism 2. Furthermore, the injection mechanism 2 can provide a more concentrated jet flame to improve the ignition stability and ensure the stability of the ignition process.

[0111] When the engine is in a high-load operating condition, the drive mechanism drives the turntable 22 to rotate, so that the plurality of blades 23 are linked with the turntable 22 and switched to a state between the closed state and the fully open state, such as a semi-open state. At this time, the first through hole 211 and the second through hole 222 are simultaneously communicated through the second central spray hole 2313 and the leaf spray holes 2311 of the plurality of blades 23, which is equivalent to increasing the number of spray holes formed by the injection mechanism 2 and appropriately reducing the effective flow area of the spray holes formed by the injection mechanism 2, so that the injection mechanism 2 can provide a larger jet distribution range and a higher jet velocity, realize large-range ignition, improve the scavenging efficiency of the pre-chamber 11 under high-load operating conditions, and suppress knocking, so as to optimize the engine combustion process and improve the combustion efficiency.

[0112] When the engine is in other operating conditions other than the cold start condition, the idle condition and the high-load condition, the drive mechanism drives the turntable 22 to rotate, so that the plurality of blades 23 are linked with the turntable 22 and switched to the closed state. At this time, there is no gap between the plurality of blades 23, and the first through hole 211 and the second through hole 222 are communicated through the leaf spray holes 2311 of the plurality of blades 23, ensuring the uniform distribution of the jet of the injection mechanism 2, and the purpose of optimizing the engine combustion process and improving the combustion efficiency can be achieved.

[0113] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. Injection mechanism, characterized in that, Comprising: A mounting base, the mounting base is provided with a first through hole; A turntable, the turntable is rotatably arranged on the mounting base around the axis of the first through hole, an installation cavity is arranged between the turntable and the mounting base, and the turntable is also provided with a second through hole corresponding to the first through hole; A plurality of blades, the plurality of blades are sequentially arranged in the installation cavity along the rotation direction of the turntable, the blades are provided with blade spray holes, the blades are connected to the turntable through a first connection structure, and the blades are connected to the mounting base through a second connection structure, and the plurality of blades can be linked with the turntable to switch between a closed state and a fully open state; In the closed state, there is no gap between the plurality of blades, and the first through hole and the second through hole are communicated through the blade spray holes of the plurality of blades; In the fully open state, a first central spray hole is formed between the plurality of blades, and the blade spray holes of the plurality of blades are all closed, and the first through hole and the second through hole are communicated through the first central spray hole.

2. The injection mechanism according to claim 1, wherein, The plurality of blades can be linked with the turntable to switch between the closed state, the semi-open state and the fully open state; In the semi-open state, a second central spray hole is formed between the plurality of blades, the cross-sectional area of the first central spray hole is larger than the cross-sectional area of the second central spray hole, and the first through hole and the second through hole are communicated through the second central spray hole and the blade spray holes of the plurality of blades.

3. The injection mechanism according to claim 1, characterized in that, The first connection structure includes a connecting shaft fixed to the blade and a connecting groove formed in the turntable, the connecting shaft is inserted into the connecting groove, the connecting shaft can move radially along the turntable in the connecting groove, and the connecting shaft can rotate in the connecting groove; The second connection structure includes a slider fixed to the blade and a sliding groove formed in the mounting base, the slider is inserted into the sliding groove, the slider can move in the sliding groove along a direction perpendicular to the moving direction of the connecting shaft in the connecting groove, and the slider cannot rotate in the sliding groove.

4. The injection mechanism according to claim 1, wherein, The axis of the blade spray hole is arranged at an angle with the axis of the first through hole.

5. The injection mechanism according to claim 4, characterized in that, The spraying direction of the blade spray hole is inclined in a direction away from the axis of the first through hole from the direction of the first through hole to the second through hole.

6. The injection mechanism according to any one of claims 1-5, characterized in that, The spraying mechanism further includes a cover body, the cover body is rotatably connected to the turntable, the cover body and the mounting base are respectively located on both sides of the turntable along its axial direction, and the cover body is provided with a third through hole corresponding to the second through hole.

7. The injection mechanism according to any one of claims 1-5, characterized in that, The inner wall of the installation cavity is provided with exhaust holes.

8. Ignition device, characterized in that, Comprising: A pre-combustion housing, the pre-combustion housing is provided with a pre-combustion chamber and an ignition hole communicated with the pre-combustion chamber; The spraying mechanism according to any one of claims 1-7, the mounting base is fixedly connected to the pre-combustion housing, and the first through hole is oppositely arranged with the ignition hole; A driving mechanism, the driving mechanism is used to drive the turntable to rotate.

9. The ignition device according to claim 8, characterized in that, The driving mechanism includes a driven gear, a transmission gear unit, and a driving member. The driving member is configured to drive the gears of the transmission gear unit to rotate, and the driven gear meshes with the gears of the transmission gear unit.

10. The ignition device according to claim 9, characterized in that, The ignition device further includes: a fuel injector configured to inject fuel into the pre-combustion chamber, an igniter configured to ignite the fuel in the pre-combustion chamber.

11. Engine system, characterized in that, including an engine and the ignition device according to any one of claims 8-10, the engine including a main combustion chamber, and the main combustion chamber communicating with the pre-combustion chamber through the nozzle holes of the injection mechanism.

12. Engine system control method, characterized in that, Applied to the engine system according to claim 11; the method for controlling the engine system includes the following steps: Obtain the current operating condition of the engine; According to the obtained current operating condition of the engine, cause the driving mechanism to drive the turntable to rotate, so that a plurality of the blades can be linked with the turntable and switch states.

13. The engine system control method according to claim 12, characterized in that, According to the obtained current operating condition of the engine, causing the driving mechanism to drive the turntable to rotate, so that a plurality of the blades can be linked with the turntable and switch states, includes the following steps: The current operating condition of the engine includes a first operating condition and a second operating condition; If the engine is in the first operating condition, cause the driving mechanism to drive the turntable to rotate, so that a plurality of the blades are linked with the turntable and switched to the fully open state; If the engine is in the second operating condition, cause the driving mechanism to drive the turntable to rotate, so that a plurality of the blades are linked with the turntable and switched to a state between the closed state and the fully open state; If the engine is not in the first operating condition and the engine is not in the second operating condition, cause the driving mechanism to drive the turntable to rotate, so that a plurality of the blades are linked with the turntable and switched to the closed state.

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