High-temperature hot surface ignition pre-combustion chamber structure

Abstract

The invention discloses a high-temperature hot surface ignition pre-combustion chamber structure, and relates to the technical field of engines. Comprising a machine base, a combustion chamber is formed in the machine base, an air inlet channel communicated with the combustion chamber is formed in the bottom of the machine base, and a spark plug mounting hole is formed in the side face of the machine base; the ignition spark plug is mounted in the spark plug mounting hole, and the spark plug mounting hole is communicated with the combustion chamber; a guide mixing member mounted between the combustion chamber and the spark plug mounting hole; the outer spherical shell is mounted on the inner wall of the combustion chamber; the pre-combustion chamber is located between the interior of the inner spherical shell and the inner end of the ignition spark plug; the guide cover is mounted on the inner surface of the inner spherical shell; the guide mixing component, the combustion chamber and the ignition spark plug are combined, mixed gas entering the pre-combustion chamber can be further mixed, the gas mixing uniformity is improved, the uniformity of gas surrounding the ignition end of the ignition spark plug is high, the gas ignition stability is improved, and the situation of ignition failure or ignition delay is not prone to occurring.

Description

Technical Field

[0001] This invention belongs to the field of engine technology, specifically a high-temperature hot surface ignition pre-combustion chamber structure. Background Technology

[0002] The engine ignition pre-combustion chamber structure is a combustion system structure in internal combustion engines used to improve ignition stability, accelerate combustion speed, and improve lean-burn and low-load operating conditions. It achieves a staged combustion method—first local ignition, then ignition of the main combustion chamber—by setting up a small, enclosed or semi-enclosed auxiliary combustion chamber outside the main combustion chamber. This is one of the key technologies of modern high-efficiency, low-emission engines.

[0003] For example, a pre-combustion structure for an engine with announcement number CN114439603B includes a main combustion chamber for supplying a mixture and for supplying exhaust gas, and a pre-combustion chamber for igniting the mixture in the main combustion chamber. A spark plug is installed in the pre-combustion chamber, and the pre-combustion chamber is connected to the main combustion chamber. The pre-combustion structure also includes a negative pressure module for forming a negative pressure, and a vent hole communicating with the negative pressure module is opened on the inner wall of the pre-combustion chamber.

[0004] In the aforementioned patent, the mixed gas from the main combustion chamber is first introduced into the pre-combustion chamber. However, the mixed gas entering the pre-combustion chamber lacks further mixing measures, and the mixed gas may have local concentrations that are too high or too low, leading to delayed ignition or even failure of the pre-combustion chamber, thereby affecting the combustion in the main combustion chamber. Furthermore, when the mixed gas enters the pre-combustion chamber for ignition, the pre-combustion chamber may experience overheating and ablation, reducing the service life of the pre-combustion chamber. Summary of the Invention

[0005] This invention proposes a high-temperature hot surface ignition pre-combustion chamber structure to solve the problem that the pre-combustion chamber may be delayed or even fail due to the local high or low concentration of the mixed gas.

[0006] A high-temperature hot surface ignition pre-combustion chamber structure includes:

[0007] The engine base has a combustion chamber inside, an air intake passage communicating with the combustion chamber is opened at the bottom of the engine base, and a spark plug mounting hole is opened on the side of the engine base.

[0008] An ignition spark plug is installed in a spark plug mounting hole, the spark plug mounting hole being connected to the combustion chamber;

[0009] A guide mixing member installed between the combustion chamber and the spark plug mounting hole, the guide mixing member comprising:

[0010] An outer spherical shell is installed on the inner wall of the combustion chamber, and an inner spherical shell is provided inside the outer spherical shell, with a mixing channel between the two for the mixed gas to pass through;

[0011] The pre-combustion chamber is located between the inner spherical shell and the inner end of the ignition spark plug;

[0012] A guide shroud is installed on the inner surface of the inner spherical shell. The inner and outer spherical shells are provided with exhaust pipes communicating with the combustion chamber on their front and rear surfaces. The exhaust pipes are located outside the guide shroud.

[0013] Preferably, the guide cover has a central pipe at its small diameter end, and a central hole is provided inside the central pipe. One end of the central pipe is close to the ignition end of the spark plug.

[0014] Preferably, the inner wall of the guide cover is provided with a mounting shaft, a support rod is provided between the mounting shaft and the inner wall of the guide cover, a mixing blade is rotatably sleeved on the mounting shaft, and a control valve is provided on the exhaust pipe to regulate the internal passage of the exhaust pipe.

[0015] Preferably, the Z-shaped mixing channel includes:

[0016] The mixing grooves on the inner spherical surface of the outer spherical shell and the outer spherical surface of the inner spherical shell form a flow channel for gas to pass through.

[0017] An external air inlet is provided on the surface of the outer spherical shell, and the external air inlet communicates with the mixing tank;

[0018] An internal air outlet is provided on the surface of the inner spherical shell, and the internal air outlet communicates with the mixing tank.

[0019] Preferably, the inner walls of both mixing tanks are provided with multiple inclined guide plates.

[0020] Preferably, the base has a vent hole communicating with the spark plug mounting hole, the top of the base has a valve body, the valve body has a negative pressure sensing armature, and a negative pressure chamber communicating with the vent hole is opened between the left side of the negative pressure sensing armature and the valve body.

[0021] Preferably, a cooling component for cooling the pre-combustion chamber is provided on the right side of the valve body, the cooling component comprising:

[0022] Cooling channels are provided inside the engine base, and these channels are distributed at the inner end of the spark plug mounting holes to cool part of the pre-combustion chamber.

[0023] A cooling cylinder is installed on the right side of the valve body. A negative pressure plate is installed inside the cooling cylinder, and a cooling chamber is provided between the negative pressure plate and the valve body.

[0024] A recovery pipe and an air inlet pipe are installed on the front and rear surfaces of the right end of the cooling cylinder, and both the recovery pipe and the air inlet pipe are connected to the cooling channel.

[0025] Preferably, a push rod is provided on the right side of the negative pressure sensing armature, which passes through the valve body and the cooling cylinder and is fixed on the left side of the negative pressure plate, and the air inlet pipe and the recovery pipe are connected to the cooling chamber.

[0026] Preferably, the cooling channel includes an annular cooling hole surrounding the inner end of the spark plug mounting hole, and the engine base has a recovery channel and an intake channel located in front of and behind the spark plug mounting hole, respectively. One end of the recovery channel and the intake channel are connected to the recovery pipe and the intake pipe, respectively, and the other end of the recovery channel and the intake channel are connected to the annular cooling hole.

[0027] Preferably, the bottom of the engine base is also provided with an exhaust passage communicating with the combustion chamber, and an intake valve and an exhaust valve are respectively provided in the intake passage and the exhaust passage.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] (1) By combining the guiding mixing component, the combustion chamber and the ignition spark plug, the present invention can further mix the mixed gas entering the pre-combustion chamber, increase the gas mixing uniformity, make the gas surrounding the ignition end of the ignition spark plug more uniform, increase the gas ignition stability, and make it less likely to have ignition failure or ignition delay, thereby ensuring the stable combustion of the subsequent combustion chamber.

[0030] (2) By setting up a mixing channel, the present invention can not affect the normal entry of the mixed gas into the pre-combustion chamber, and can further mix the gas during the flow process, so as to ensure that the gas concentration in the pre-combustion chamber is relatively uniform and facilitates subsequent ignition.

[0031] (3) By combining the cooling component and the negative pressure induction armature, the present invention can cool the periphery of the pre-combustion chamber during its use, thereby preventing the pre-combustion chamber from overheating and burning, ensuring the ignition stability of the pre-combustion chamber, and reducing the adverse effects on the service life of the pre-combustion chamber. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a high-temperature hot surface ignition pre-combustion chamber structure provided by the present invention;

[0033] Figure 2 This invention provides a partial front view of the structure of a high-temperature hot surface ignition pre-combustion chamber.

[0034] Figure 3 An exploded view of a guide mixing component for a high-temperature hot surface ignition pre-combustion chamber structure provided by the present invention;

[0035] Figure 4 A cross-sectional view of a guide mixing component for a high-temperature hot surface ignition pre-combustion chamber structure provided by the present invention;

[0036] Figure 5 for Figure 4 Enlarged view of region A in the middle;

[0037] Figure 6 A schematic diagram of the cooling component of a high-temperature hot surface ignition pre-combustion chamber structure is provided.

[0038] Figure 7 for Figure 6 Cross-sectional view of the central cooling channel.

[0039] In the diagram: 100, Engine base; 101, Combustion chamber; 102, Ignition spark plug; 103, Intake passage; 104, Negative pressure induction armature; 105, Vent hole; 106, Spark plug mounting hole; 200, Guide mixing component; 201, Outer spherical shell; 202, Inner spherical shell; 203, Mixing passage; 2031, External air inlet; 2032, Mixing groove; 2033, Inclined guide plate; 2034, Internal air outlet; 204. Exhaust pipe; 205. Guide shield; 206. Centralized pipe; 2061. Centralized hole; 207. Sealing ring; 208. Mixing blade; 209. Control valve; 300. Cooling component; 301. Cooling channel; 3011. Annular cooling hole; 3012. Intake duct; 3013. Recovery duct; 302. Negative pressure plate; 303. Push rod; 304. Intake pipe; 305. Cooling cylinder; 306. Recovery pipe. Detailed Implementation

[0040] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1

[0042] Please see Figure 1 - Figure 4 This application provides a high-temperature hot surface ignition pre-combustion chamber structure, comprising:

[0043] The engine base 100 has a combustion chamber 101 inside, an air intake passage 103 communicating with the combustion chamber 101 at the bottom of the engine base 100, and a spark plug mounting hole 106 on the side of the engine base 100.

[0044] An ignition spark plug 102 is installed in a spark plug mounting hole 106, which is connected to a combustion chamber 101.

[0045] A guide mixing component 200 is installed between the combustion chamber 101 and the spark plug mounting hole 106. By providing the guide mixing component 200, the mixed gas entering the pre-combustion chamber can be further mixed, increasing the gas mixing uniformity. This results in higher gas uniformity around the ignition end of the ignition spark plug 102, increasing the gas ignition stability and reducing the likelihood of ignition failure or ignition delay. This relatively ensures stable combustion in the subsequent combustion chamber 101. The guide mixing component 200 includes:

[0046] An outer spherical shell 201 is installed on the inner wall of the combustion chamber 101. An inner spherical shell 202 is provided inside the outer spherical shell 201. A mixing channel 203 is left between the two for the mixed gas to pass through. The number of mixing channels 203 is set as needed. The mixing channel 203 is Z-shaped as a whole, and the inlet diameter of the mixing channel 203 is larger than the outlet diameter. This facilitates the rapid entry of the mixed gas in the combustion chamber 101 into the mixing channel 203, and makes it difficult for it to flow backward. When the gas is discharged, it is pressurized and acts on the blades on the side of the mixing blade 208, which prolongs the passage through which the mixed gas passes and further increases the uniformity of gas mixing.

[0047] The pre-combustion chamber is located between the inner spherical shell 202 and the inner end of the ignition spark plug 102, that is, between the inner spherical shell 202 and the spark plug mounting hole 106 reserved at the ignition end of the ignition spark plug 102.

[0048] A guide shroud 205 is installed on the inner surface of the inner spherical shell 202. The guide shroud 205 is conical, which facilitates the guidance of the mixed gas to the ignition end of the spark plug 102. The inner spherical shell 202 and the outer spherical shell 201 are provided with exhaust pipes 204 that communicate with the combustion chamber 101 on their front and rear surfaces. The exhaust pipes 204 are located outside the guide shroud 205, and the diameter of the exhaust pipes 204 is larger than the diameter of the concentrator hole 2061. Most of the gas after ignition is located outside the guide shroud 205 and is discharged from the exhaust pipes 204. The number of exhaust pipes 204 is set as needed.

[0049] In this embodiment, preferably, a central pipe 206 is provided at the small diameter end of the guide cover 205, and a central hole 2061 is provided inside the central pipe 206. One end of the central pipe 206 is close to the ignition end of the spark plug 102, so that the mixed gas can be discharged through the central hole 2061 and quickly ignited near the ignition end of the spark plug 102.

[0050] In this embodiment, preferably, the inner wall of the guide cover 205 is provided with an installation shaft, and a support rod is provided between the installation shaft and the inner wall of the guide cover 205. A mixing blade 208 is rotatably sleeved on the installation shaft. The mixed gas is discharged through the mixing channel 203 into the space between the inner spherical shell 202 and the guide cover 205, and impacts the mixing blade 208 to make the mixing blade 208 rotate and further mix the gas, thereby increasing the uniformity of gas mixing. A control valve 209 is provided on the exhaust pipe 204. The valve stem of the control valve 209 extends to the outside of the base 100, and the valve stem can be driven by a mechanical structure, such as a motor. The control valve 209 regulates the internal channel of the exhaust pipe 204.

[0051] In this embodiment, preferably, the bottom of the base 100 is also provided with an exhaust passage communicating with the combustion chamber 101 to facilitate the discharge of combustion exhaust gas. An intake valve and an exhaust valve are respectively provided in the intake passage 103 and the exhaust passage.

[0052] In summary, during operation, gas and fuel enter the combustion chamber 101 through the intake channel 103 and mix. The negative pressure sensing armature 104 is energized and moves, drawing gas from the pre-combustion chamber through the vent 105, reducing the pressure in the pre-combustion chamber to less than that in the combustion chamber 101. At this time, the valve in the control valve 209 blocks the exhaust pipe 204, preventing the mixed gas from entering the pre-combustion chamber through the exhaust pipe 204. The mixed gas then enters the guide shroud 205 through the mixing channel 203, impacting the mixing blades 208 inside the guide shroud 205, causing the mixing blades 208 to rotate, further... The gas is stirred and mixed, and the further mixed gas is discharged through the central hole 2061 to the ignition end of the spark plug 102. During ignition, the combustion gas fills the space outside the guide cover 205. At this time, the valve in the control valve 209 rotates to open the internal passage of the exhaust pipe 204. The combustion gas enters the combustion chamber 101 through the exhaust pipe 204 and ignites the gas in the combustion chamber 101. The exhaust gas produced after the gas combustion is de-energized and moves in the reverse direction, squeezing the exhaust gas outward through the exhaust pipe 204 into the combustion chamber 101, and then discharged outward through the exhaust passage.

[0053] Example 2

[0054] Based on Example 1, refer to Figure 3 - Figure 5 This is the second embodiment of the present invention.

[0055] In this embodiment, preferably, by providing a mixing channel 203, the normal entry of the mixed gas into the pre-combustion chamber is not affected, and the gas is further mixed during the flow process, ensuring a relatively uniform gas concentration in the pre-combustion chamber, which facilitates subsequent ignition. The Z-shaped mixing channel 203 includes:

[0056] The mixing grooves 2032 are opened on the inner spherical surface of the outer spherical shell 201 and the outer spherical surface of the inner spherical shell 202. The mixing grooves 2032 on the surfaces of the two form a flow channel for gas to pass through, and a sealing ring 207 is embedded between the inner spherical surface of the outer spherical shell 201 and the inner spherical shell 202.

[0057] An external air inlet 2031 is provided on the surface of the outer spherical shell 201, and the external air inlet 2031 communicates with the mixing tank 2032;

[0058] An internal air outlet 2034 is opened on the surface of the inner spherical shell 202. The internal air outlet 2034 is connected to the mixing tank 2032. The diameter of the external air inlet 2031 can be set to be larger than that of the internal air outlet 2034 to facilitate air flow and prevent backflow.

[0059] In this embodiment, preferably, multiple inclined guide plates 2033 are provided on the inner walls of both mixing tanks 2032. The gas entering the mixing tank 2032 impacts the inclined guide plates 2033, forming turbulence, which facilitates further mixing of the gas.

[0060] In summary, during use, the gas in the combustion chamber 101 enters the mixing tank 2032 through the larger-diameter external air inlet 2031. The gas flows towards the internal air outlet 2034 in the mixing tank 2032. During the flow, the gas continuously impacts the inclined guide plate 2033 on the inner wall of the mixing tank 2032, causing the laminar gas to become turbulent and further mixed. Finally, it is pressurized and discharged from the smaller-diameter internal air outlet 2034, and acts on the mixing blades 208, causing the mixing blades 208 to rotate and mix the gas. The multiple mixing makes the gas concentration around the ignition end of the spark plug 102 relatively uniform, which facilitates ignition.

[0061] Example 3

[0062] Based on Example 2, refer to Figure 2 , Figure 6 and Figure 7 This is the third embodiment of the present invention.

[0063] In this embodiment, preferably, the base 100 is provided with a vent 105 communicating with the spark plug mounting hole 106, the top of the base 100 is provided with a valve body, the valve body is provided with a negative pressure sensing armature 104, and a negative pressure chamber communicating with the vent 105 is opened between the left side of the negative pressure sensing armature 104 and the valve body.

[0064] In this embodiment, preferably, a cooling component 300 for cooling the pre-combustion chamber is provided on the right side of the valve body. By combining the cooling component 300 with the negative pressure induction armature 104, the periphery of the pre-combustion chamber can be cooled during its use, preventing overheating and erosion of the pre-combustion chamber, thus ensuring the ignition stability of the pre-combustion chamber and reducing adverse effects on its service life. The cooling component 300 includes:

[0065] The cooling channel 301 inside the base 100 is distributed at the inner end of the spark plug mounting hole 106 to cool part of the pre-combustion chamber, that is, to cool the pre-combustion chamber near the ignition end of the spark plug 102, so as to avoid the situation where the temperature near the ignition end is higher and thus burns.

[0066] A cooling cylinder 305 is installed on the right side of the valve body. A negative pressure plate 302 is provided inside the cooling cylinder 305. The negative pressure plate 302 can cooperate with the cooling plate to cool the medium in the cooling chamber. A cooling chamber is provided between the negative pressure plate 302 and the valve body. The cooling medium entering the cooling channel 301 is stored in the cooling chamber.

[0067] The recovery pipe 306 and the air inlet pipe 304 are installed on the front and rear surfaces of the right end of the cooling cylinder 305. Valves are installed on both the recovery pipe 306 and the air inlet pipe 304. Both the recovery pipe 306 and the air inlet pipe 304 are connected to the cooling channel 301 to facilitate the delivery and recovery of the cooling medium.

[0068] In this embodiment, preferably, a push rod 303 is provided on the right side of the negative pressure sensing armature 104, which passes through the valve body and the cooling cylinder 305 and is fixed on the left side of the negative pressure plate 302. The push rod 303 can move synchronously with the negative pressure sensing armature 104. The air inlet pipe 304 and the recovery pipe 306 are connected to the cooling chamber.

[0069] In this embodiment, preferably, the cooling channel 301 includes an annular cooling hole 3011 surrounding the inner end of the spark plug mounting hole 106, surrounding the outer side of the ignition end of the spark plug 102, and cooling the pre-combustion chamber at the ignition end. The base 100 has a recovery channel 3013 and an air intake channel 3012 located in front of and behind the spark plug mounting hole 106, respectively. One end of the recovery channel 3013 and the air intake channel 3012 are connected to the recovery pipe 306 and the air intake pipe 304, respectively, and the other end of the recovery channel 3013 and the air intake channel 3012 are connected to the annular cooling hole 3011, respectively.

[0070] In summary, when the negative pressure induction armature 104 is energized and moves to the right, it will drive the push rod 303 and the negative pressure plate 302 to move to the right. At this time, the valve on the recovery pipe 306 is closed, while the valve on the intake pipe 304 is open. The gas in the cooling chamber enters the intake passage 3012 through the intake pipe 304 and enters the annular cooling hole 3011. Since the recovery pipe 306 is closed, the gas fills the annular cooling hole 3011, the intake passage 3012, and the recovery passage 3013. During ignition, the cooling medium transfers the temperature to the pre-combustion chamber through the base 100, which is close to the ignition end. The combustion chamber is cooled to reduce the impact of overheating. When the negative pressure induction armature 104 is de-energized and moves in the reverse direction after combustion, the valve on the recovery pipe 306 can be opened and the valve on the intake pipe 304 can be closed. The negative pressure plate 302 moves with the negative pressure induction armature 104, and the space of the cooling chamber gradually increases. The gas carrying the temperature in the cooling channel 301 is drawn into the cooling chamber for cooling and cooling. The cooled gas can then re-enter the cooling channel 301 to cool the pre-combustion chamber near the ignition end, reducing the possibility of overheating and erosion, and increasing the ignition stability and safety of the pre-combustion chamber.

[0071] The working principle of this invention is as follows: During use, gas and fuel enter the combustion chamber 101 through the intake channel 103 and mix. The negative pressure induction armature 104 is energized and moves, drawing gas from the pre-combustion chamber through the vent 105. Simultaneously, the negative pressure induction armature 104 drives the push rod 303 and the negative pressure plate 302 to move to the right. Gas in the cooling chamber is forced into the cooling channel 301 through the intake pipe 304. The mixed gas in the combustion chamber 101 enters the guide cover 205 through the mixing channel 203 and impacts the mixing blades 208, causing the mixing blades 208 to rotate and further agitate and mix the gas. The relatively uniform gas surrounds the ignition end of the spark plug 102. The cooling channel 301 is designed to facilitate rapid ignition, while the cooling medium filling the cooling channel 301 cools the pre-combustion chamber near the ignition end, reducing the probability of ablation. After combustion, the negative pressure induction armature 104 is de-energized and moves in the reverse direction, forcing the exhaust gas generated after combustion outward through the exhaust pipe 204 into the combustion chamber 101 and outward through the exhaust channel. At the same time, the negative pressure plate 302 moves with the negative pressure induction armature 104, and the space of the cooling chamber gradually increases, drawing the gas carrying temperature in the cooling channel 301 into the cooling chamber for cooling and cooling down, making it convenient for the next use. All components involved in the combustion part in this application are coated with a thermal barrier coating to provide protection.

[0072] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A high-temperature hot surface ignition pre-combustion chamber structure, characterized in that, include: Engine base (100), the engine base (100) has a combustion chamber (101) inside, the engine base (100) has an air intake passage (103) communicating with the combustion chamber (101) at the bottom, and the engine base (100) has a spark plug mounting hole (106) on the side. An ignition spark plug (102) is installed in a spark plug mounting hole (106), the spark plug mounting hole (106) being in communication with the combustion chamber (101); A guide mixing member (200) installed between the combustion chamber (101) and the spark plug mounting hole (106), the guide mixing member (200) comprising: An outer spherical shell (201) is installed on the inner wall of the combustion chamber (101), and an inner spherical shell (202) is provided inside the outer spherical shell (201), with a mixing channel (203) between the two for the mixed gas to pass through. The pre-combustion chamber is located between the inner spherical shell (202) and the inner end of the ignition spark plug (102); A guide cover (205) is installed on the inner surface of the inner spherical shell (202). The inner spherical shell (202) and the outer spherical shell (201) are provided with exhaust pipes (204) that communicate with the combustion chamber (101) on their front and rear surfaces. The exhaust pipes (204) are located outside the guide cover (205).

2. The high-temperature hot surface ignition pre-combustion chamber structure according to claim 1, characterized in that, The guide cover (205) has a central pipe (206) at its small diameter end. The central pipe (206) has a central hole (2061) inside. One end of the central pipe (206) is close to the ignition end of the spark plug (102).

3. The high-temperature hot surface ignition pre-combustion chamber structure according to claim 2, characterized in that, The inner wall of the guide cover (205) is provided with an installation shaft, and a support rod is provided between the installation shaft and the inner wall of the guide cover (205). A mixing blade (208) is rotatably sleeved on the installation shaft. A control valve (209) is provided on the exhaust pipe (204), and the control valve (209) regulates the internal channel of the exhaust pipe (204).

4. The high-temperature hot surface ignition pre-combustion chamber structure according to claim 2, characterized in that, The Z-shaped mixing channel (203) includes: The mixing grooves (2032) opened on the inner spherical surface of the outer spherical shell (201) and the outer spherical surface of the inner spherical shell (202) form a flow channel for gas to pass through; An external air inlet (2031) is provided on the surface of the outer spherical shell (201), and the external air inlet (2031) is connected to the mixing tank (2032); An internal vent (2034) is provided on the surface of the inner spherical shell (202), and the internal vent (2034) is connected to the mixing tank (2032).

5. The high-temperature hot surface ignition pre-combustion chamber structure according to claim 4, characterized in that, The inner walls of both mixing tanks (2032) are provided with multiple inclined guide plates (2033).

6. The high-temperature hot surface ignition pre-combustion chamber structure according to claim 1, characterized in that, The base (100) is provided with a vent (105) communicating with the spark plug mounting hole (106). A valve body is provided on the top of the base (100). A negative pressure sensing armature (104) is provided inside the valve body. A negative pressure chamber communicating with the vent (105) is opened between the left side of the negative pressure sensing armature (104) and the valve body.

7. The high-temperature hot surface ignition pre-combustion chamber structure according to claim 6, characterized in that, A cooling component (300) for cooling the pre-combustion chamber is provided on the right side of the valve body. The cooling component (300) includes: A cooling channel (301) is provided inside the base (100), the cooling channel (301) being distributed at the inner end of the spark plug mounting hole (106) to cool part of the pre-combustion chamber; A cooling cylinder (305) is installed on the right side of the valve body. A negative pressure plate (302) is provided inside the cooling cylinder (305). A cooling chamber is provided between the negative pressure plate (302) and the valve body. A recovery pipe (306) and an air inlet pipe (304) are installed on the front and rear surfaces of the right end of the cooling cylinder (305), and both the recovery pipe (306) and the air inlet pipe (304) are connected to the cooling channel (301).

8. The high-temperature hot surface ignition pre-combustion chamber structure according to claim 7, characterized in that, The negative pressure sensing armature (104) is provided with a push rod (303) that passes through the valve body and the cooling cylinder (305) and is fixed to the left side of the negative pressure plate (302). The air inlet pipe (304) and the recovery pipe (306) are connected to the cooling chamber.

9. The high-temperature hot surface ignition pre-combustion chamber structure according to claim 8, characterized in that, The cooling channel (301) includes an annular cooling hole (3011) surrounding the inner end of the spark plug mounting hole (106). The housing (100) has a recovery channel (3013) and an intake channel (3012) located in front of and behind the spark plug mounting hole (106), respectively. One end of the recovery channel (3013) and the intake channel (3012) are connected to the recovery pipe (306) and the intake pipe (304), respectively, and the other end of the recovery channel (3013) and the intake channel (3012) are connected to the annular cooling hole (3011).

10. The high-temperature hot surface ignition pre-combustion chamber structure according to claim 1, characterized in that, The bottom of the base (100) is also provided with an exhaust passage that communicates with the combustion chamber (101), and an intake valve and an exhaust valve are respectively provided in the intake passage (103) and the exhaust passage.

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