Pre-combustion chamber one-way valve, pre-combustion chamber system and engine

Abstract

The utility model discloses a pre-combustion chamber one-way valve, a pre-combustion chamber system and an engine, and relates to the technical field of engineering machinery. Comprising a valve body, a valve element and baffles. A valve hole is formed in the valve body, the valve element is movably connected into the valve hole, an output hole formed below the valve hole is formed in the valve body, and the valve head end of the valve element can make and break the output hole and the valve hole. The extending end of the valve element can extend out of the valve hole, and the baffle is connected to the extending end so as to axially limit the valve element. A plurality of flow channel holes leading to the output hole are further formed in the valve body, at least part of areas of the flow channel holes are provided with spiral sections so that spiral fluid channels can be formed in the flow channel holes, combustible mixed gas can form vortexes to be output from the output hole, and gas scavenging near a spark plug, especially the root portion can be achieved when the combustible mixed gas is output from the output hole. Residual waste gas near the spark plug is thoroughly removed, the combustion sufficiency is improved, and the exhaust temperature is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to a pre-combustion chamber one-way valve, a pre-combustion chamber system and an engine. Background Art

[0002] High-energy ignition is an effective way to improve the thermal efficiency of spark-ignition engines. The ignition energy of the precombustion chamber is several orders of magnitude higher than that of ordinary spark plug ignition, so it has a significant effect on accelerating combustion speed and improving thermal efficiency. The precombustion chamber is divided into active precombustion chamber and passive precombustion chamber. The air-fuel ratio in the passive precombustion chamber is determined by the residual exhaust gas and the mixture entering the main combustion chamber, and there is no separate means of adjustment; the active precombustion chamber is additionally equipped with a fuel supply system, the system is complex and the cost is high. The use of low-pressure active scavenging can avoid the above-mentioned problems of active precombustion chamber scavenging or passive precombustion chamber scavenging. The pressure difference between the intake pipe and the precombustion chamber in the intake stroke can be used to introduce the combustible mixture in the intake pipe into the precombustion chamber. Therefore, the precombustion chamber needs to be connected to the intake pipe through a pipe, and a one-way valve is set in the middle of the pipe to control the connection between the intake pipe and the precombustion chamber;

[0003] However, there are some problems with the setting of the one-way valve. Due to the limited space inside the pre-combustion chamber, the one-way valve and the spark plug are usually arranged in parallel above the pre-combustion chamber. This makes it difficult for the combustible mixture flowing out of the one-way valve to flow horizontally to reach the root part of the spark plug. The combustible mixture flowing into the pre-combustion chamber has a poor purging effect on the area near the spark plug, resulting in residual exhaust gas near the spark plug, causing incomplete combustion and increasing the exhaust temperature. Utility Model Content

[0004] The utility model provides a pre-combustion chamber one-way valve, a pre-combustion chamber system and an engine, so as to solve the problem that the combustible mixture flowing out of the one-way valve is difficult to flow horizontally to the root part of the spark plug, and the combustible mixture flowing into the pre-combustion chamber has a poor purging effect on the vicinity of the spark plug, so that residual exhaust gas exists near the spark plug, resulting in incomplete combustion and increased exhaust temperature.

[0005] The technical solution adopted by the utility model is:

[0006] A pre-combustion chamber one-way valve is used in an engine to open and close a pre-combustion chamber, comprising a valve body, a valve core and a baffle; a valve hole is provided in the valve body, the valve core is movably connected in the valve hole, an output hole is provided in the valve body and is arranged below the valve hole, and the valve head end of the valve core can open and close the output hole and the valve hole; the protruding end of the valve core can extend out of the valve hole, and the baffle is connected to the protruding end to axially limit the valve core; a plurality of flow channel holes leading to the output hole are also provided in the valve body, and at least part of the flow channel hole has a spiral section so that a spiral fluid channel is formed in the flow channel hole.

[0007] A pre-combustion chamber one-way valve of the utility model also has the following additional technical features:

[0008] The flow channel hole includes a direct flow section and a spiral section connected to each other. The direct flow section is arranged on the upstream side of the flow channel hole, and the spiral section is arranged on the downstream side of the flow channel hole. When the valve core is opened, the spiral section can be connected to the output hole.

[0009] The valve hole includes a first guide hole and a second guide hole that are connected to each other; the axial length of the first guide hole is smaller than the length of the direct current section, a first gap is formed between the first guide hole and the valve core, one end of the second guide hole is connected to the output hole, a second gap is formed between the second guide hole and the valve core, and the second gap is smaller than the first gap.

[0010] The flow channel hole comprises a spiral section, one end of which is connected to the top surface of the valve body, and the other end of which can be connected to the output hole when the valve core is opened.

[0011] The helical angle between the helical section and the axis of the valve core ranges from 10° to 35°.

[0012] The rotation direction of the spiral section is opposite to the rotation direction of the spray hole of the pre-combustion chamber.

[0013] The present application also relates to a precombustion chamber system, which is based on the above-mentioned precombustion chamber one-way valve, and the precombustion chamber system includes an intake pipe, a distributor, a precombustion body and a bushing assembly; the bushing assembly includes a spark plug bushing and an ignition coil bushing; the spark plug bushing is connected with a spark plug and a precombustion chamber one-way valve, and the ignition coil bushing is connected with an ignition coil; the intake pipe is connected to the distributor through a pipeline, and the distributor is connected to the precombustion chamber one-way valve through a pipeline; the precombustion body is connected to the bushing assembly, and a precombustion chamber is formed in the inner cavity of the precombustion body, and the precombustion chamber one-way valve can connect or disconnect the intake pipe with the precombustion chamber.

[0014] The air inlet pipe has at least one air intake port, and the air intake port is connected to the distributor through an air intake pipe.

[0015] The pre-combustion chamber one-way valve is connected in parallel with the spark plug in the spark plug bushing, and the height of the bottom of the pre-combustion chamber one-way valve along the axial direction of the spark plug bushing is higher than the height of the bottom of the spark plug along the axial direction of the spark plug bushing.

[0016] The present application also relates to an engine, comprising: a turbocharger, a cylinder and a pre-combustion chamber system as described above connected to the cylinder, the turbocharger comprising a compressor and a turbine, the compressor being connected to the intake pipe for providing air to the intake pipe, and the turbine being connected to the exhaust pipe of the cylinder for exhaust gas discharge.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0018] 1. A pre-combustion chamber one-way valve of the present application is used in an engine to open and close a pre-combustion chamber, comprising a valve body, a valve core and a baffle; a valve hole is provided in the valve body, the valve core is movably connected in the valve hole, an output hole is provided in the valve body and is arranged below the valve hole, and the valve head end of the valve core can open and close the output hole and the valve hole, so that when the valve head end of the valve core moves along the valve hole to connect the output hole and the valve hole, the combustible mixed gas can flow to the output hole through the pre-combustion chamber one-way valve; the extended end of the valve core can extend out of the valve hole, and the baffle is connected to the extended end to axially limit the valve core, so as to prevent the valve core from falling into the valve hole and being unable to reset;

[0019] The valve body is also provided with a plurality of flow holes leading to the output hole, and at least part of the flow hole has a spiral section so that a spiral fluid channel is formed in the flow hole; thereby, the combustible mixture gas can form a vortex, and the disturbance ability of the combustible mixture gas output from the output hole is enhanced, and when output from the output hole, the vicinity of the spark plug, especially the root part, can be scavenged to completely remove the residual exhaust gas near the spark plug, thereby improving the completeness of combustion and reducing the temperature of the exhaust gas; improving the scavenging effect of the pre-combustion chamber, improving transient misfires, and improving the scavenging near the spark plug; during the load step process, the scavenging is sufficient to improve the stability of ignition; improving the ignition energy, improving the steady-state ignition energy, the scavenging near the spark plug is more sufficient, the flow velocity is high, the flame propagation is fast, the proportion of cold jets is reduced, and the volume utilization rate of the pre-combustion chamber is improved.

[0020] 2. As a preferred embodiment of the utility model, the flow channel hole includes a direct current section and a spiral section connected to each other, the direct current section is arranged on the upstream side of the flow channel hole, and the spiral section is arranged on the downstream side of the flow channel hole, and when the valve core is opened, the spiral section can be connected to the output hole.

[0021] As one of the structural forms of the flow channel hole, the flow channel hole is provided with a partial spiral section, and the spiral section near the bottom of the valve core can be connected with the output hole when the valve core is opened, so that the combustible mixture gas passing through the spiral section can form a vortex in the spiral section and be output from the output hole to fully clean the residual exhaust gas near the spark plug.

[0022] 3. As a preferred embodiment of the present invention, the valve hole includes a first guide hole and a second guide hole that are connected to each other; the axial length of the first guide hole is smaller than the length of the direct current section, a first gap is provided between the first guide hole and the valve core, one end of the second guide hole is connected to the output hole, a second gap is formed between the second guide hole and the valve core, and the second gap is smaller than the first gap.

[0023] The valve hole has a first guide hole and a second guide hole that are connected to each other; there is a first gap between the first guide hole and the valve core, so as to facilitate the movement of the valve core along the axial direction of the valve hole and avoid jamming due to excessively long guide distance; there is a second gap between the second guide hole and the valve core, so as to enable the valve core to move along the axial direction of the valve hole, and the second gap is relatively smaller than the first gap to prevent the valve core from shaking or swinging in the second guide hole, thereby causing tilting, that is, to avoid movement deviation of the valve core in the second guide hole, and the second gap is smaller to achieve a certain degree of sealing.

[0024] 4. As a preferred embodiment of the present invention, the flow channel hole includes a spiral section, one end of the spiral section is connected to the top surface of the valve body, and the other end of the spiral section can be connected to the output hole when the valve core is opened.

[0025] As another structural form of the flow channel hole, the flow channel hole can be formed into a spiral segment as a whole, and one end of the spiral segment is connected to the top surface of the valve body, so that the combustible mixture gas can enter the flow channel hole through this end of the spiral segment, and the other end of the flow channel hole can be connected with the output hole when the valve core is opened, so that the combustible mixture gas can form a vortex state from the output port of the output hole through the flow channel hole, and can achieve sufficient purge of the pre-combustion chamber, the vicinity of the spark plug and even the root part of the spark plug, and completely remove the residual exhaust gas, thereby ensuring combustion stability and reducing the exhaust temperature.

[0026] 5. As a preferred embodiment of the present invention, the helix angle between the helical section and the axis of the valve core is in the range of 10° to 35°.

[0027] The flow channel hole is set to a spiral structure with a helix angle range of 10° to 35°. The reason for setting it within this range is that if the helix angle is too small, the vortex formed will be small and the fresh combustible mixture gas cannot be transported to the vicinity of the spark plug; if the helix angle is too large, the intake flow capacity will become weak and the intake volume will be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0029] Figure 1 This is a schematic diagram of a pre-combustion chamber one-way valve structure in one embodiment of the utility model;

[0030] Figure 2 This is a top view of a pre-combustion chamber one-way valve according to an embodiment of the utility model;

[0031] Figure 3It is a structural schematic diagram of a pre-combustion chamber system in one embodiment of the utility model;

[0032] Figure 4 It is a schematic diagram of the connection structure of a pre-combustion body, a bushing assembly, a pre-combustion chamber check valve, a distribution pipe, an ignition coil and a spark plug of a pre-combustion chamber system in one embodiment of the utility model;

[0033] In the figure,

[0034] 1. Valve body; 2. Valve core; 3. Baffle;

[0035] 4. valve hole; 41. first guide hole; 42. second guide hole;

[0036] 5. Output hole; 6. Extension end; 7. Valve head end;

[0037] 8. flow channel hole; 81. straight section; 82. spiral section;

[0038] 9. Pre-combustion chamber; 10. Air intake pipe; 11. Distributor; 12. Pre-combustion body;

[0039] 13. Bushing assembly; 131. Spark plug bushing; 132. Ignition coil bushing;

[0040] 14. Spark plug; 15. Pre-combustion chamber one-way valve; 16. Ignition coil; 17. Air intake pipe; 18. Distribution pipe; 19. Electrode; a-The helical angle between the helical segment and the axis of the valve core. DETAILED DESCRIPTION

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0042] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" 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 utility model. 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 an appropriate manner in any one or more embodiments or examples.

[0045] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0046] The present application relates to a pre-combustion chamber one-way valve, which is used in an engine to open and close the pre-combustion chamber, such as Figure 1-4 As shown, it includes a valve body 1, a valve core 2 and a baffle 3; a valve hole 4 is opened in the valve body 1, and the valve core 2 is movably connected to the valve hole 4; an output hole 5 arranged below the valve hole 4 is opened in the valve body 1, and the valve head end 7 of the valve core 2 can connect and disconnect the output hole 5 and the valve hole 4; the extended end 6 of the valve core 2 can extend out of the valve hole 4, and the baffle 3 is connected to the extended end 6 to axially limit the valve core 2; a plurality of flow channel holes 8 leading to the output hole 5 are also opened in the valve body 1, and at least part of the flow channel hole 8 has a spiral section 82, so that a spiral fluid channel is formed in the flow channel hole 8.

[0047] In the present application, the valve head end 7 of the valve core 2 can connect and disconnect the output hole 5 and the valve hole 4, so that when the valve head end 7 of the valve core 2 moves along the valve hole 4 to connect the output hole 5 with the valve hole 4, the combustible mixed gas can flow to the output hole 5 through the valve hole 4; the protruding end 6 of the valve core 2 can extend out of the valve hole 4, and the baffle 3 is connected to the protruding end 6 to axially limit the valve core 2 to prevent the valve core 2 from falling into the valve hole 4 and being unable to reset; a plurality of flow channel holes 8 leading to the output hole 5 are also provided in the valve body 1, and at least part of the flow channel hole 8 has a spiral section 82 so that a spiral fluid channel is formed in the flow channel hole 8; thereby, the combustible mixed gas can form a vortex, and the disturbance ability of the combustible mixed gas output from the output hole 5 is enhanced, and when output from the output hole 5, the spark plug 14, especially the root part, can be scavenged to completely remove the residual exhaust gas near the spark plug 14, thereby improving the combustion completeness and reducing the exhaust temperature. Improve the scavenging effect of the pre-combustion chamber, improve transient misfires, and improve the scavenging near the spark plug; during the load step process, the scavenging is sufficient to improve the stability of ignition; increase the ignition energy, increase the steady-state ignition energy, the scavenging near the spark plug is more sufficient, the flow rate is high, the flame propagation is fast, the cold jet ratio is reduced, and the volume utilization rate of the pre-combustion chamber is improved.

[0048] The structure of the flow channel hole 8 is not limited by the present application and can adopt any of the following implementations:

[0049] Embodiment 1: The flow channel hole 8 includes a direct current section 81 and a spiral section 82 connected to each other. The direct current section 81 is arranged on the upstream side of the flow channel hole 8, and the spiral section 82 is arranged on the downstream side of the flow channel hole 8. When the valve core 2 is opened, the spiral section 82 can be connected to the output hole 5.

[0050] As one of the structural forms of the flow channel hole 8, the flow channel hole 8 is provided with a partial spiral section 82, and the spiral section 82 near the bottom of the valve core can be connected with the output hole 5 when the valve core 2 is opened, so that the combustible mixture gas passing through the spiral section 82 can form a vortex in the spiral section 82 and be output from the output hole 5 to fully clean the residual exhaust gas near the spark plug 14.

[0051] Embodiment 2: the flow channel hole 8 includes a spiral section 82 , one end of the spiral section 82 is connected to the top surface of the valve body 1 , and the other end of the spiral section 82 can be connected to the output hole 5 when the valve core 2 is opened.

[0052] As another structural form of the flow channel hole 8, the flow channel hole 8 can be formed as a spiral section 82 as a whole, and one end of the spiral section 82 is connected to the top surface of the valve body 1, so that the combustible mixture gas can enter the flow channel hole 8 through this end of the spiral section 82, and the other end of the flow channel hole 8 can be connected with the output hole 5 when the valve core 2 is opened, so that the combustible mixture gas can form a vortex state through the flow channel hole 8 and the output port of the output hole 5, and can achieve sufficient purging of the pre-combustion chamber 9 and the vicinity of the spark plug 14 and even the root part of the spark plug 14, and completely remove the residual exhaust gas, thereby ensuring combustion stability and reducing the exhaust temperature.

[0053] As a preferred embodiment, the spiral angle a between the spiral section 82 and the axis of the valve core 2 is in the range of 10° to 35°. The flow channel hole 8 is set as a spiral structure with a spiral angle in the range of 10° to 35°. The reason for setting it in this range is that if the spiral angle is too small, the vortex formed is small and the fresh combustible mixed gas cannot be transported to the vicinity of the spark plug 14; if the spiral angle is too large, the intake flow capacity becomes weak and the intake volume is reduced.

[0054] As a preferred embodiment, the rotation direction of the spiral segment 82 is opposite to the rotation direction of the spray hole of the pre-combustion chamber 9. The direction of the spiral angle is consistent with the spiral direction of the spray hole of the pre-combustion chamber 9, which enhances the vortex intensity in the pre-combustion chamber 9 during the intake process.

[0055] As a preferred embodiment, the valve hole 4 includes a first guide hole 41 and a second guide hole 42 that are connected to each other; the axial length of the first guide hole 41 is smaller than the length of the direct current section 81, and a first gap is formed between the first guide hole 41 and the valve core 2; one end of the second guide hole 42 is connected to the output hole 5, and a second gap is formed between the second guide hole 42 and the valve core 2, and the second gap is smaller than the first gap.

[0056] The valve hole 4 has a first guide hole 41 and a second guide hole 42 that are connected to each other; there is a first gap between the first guide hole 41 and the valve core 2, the purpose of which is to facilitate the valve core 2 to move along the axial direction of the valve hole 4, and there will be no jamming problem due to the long guide distance; there is a second gap between the second guide hole 42 and the valve core 2, the purpose of which is to enable the valve core 2 to move along the axial direction of the valve hole 4, and the second gap is relatively smaller than the first gap to prevent the valve core 2 from shaking or swinging in the second guide hole 42, causing tilting, that is, to avoid the valve core 2 from moving deviation in the second guide hole 42, and the second gap is smaller to achieve a certain degree of sealing.

[0057] The present application also relates to a pre-combustion chamber system, based on the above-mentioned pre-combustion chamber one-way valve, such as Figure 3As shown, the pre-combustion chamber system includes an intake pipe 10, a distributor 11, a pre-combustion body 12 and a bushing assembly 13; the bushing assembly 13 includes a spark plug bushing 131 and an ignition coil bushing 132; the spark plug bushing 131 is connected with a spark plug 14 and a pre-combustion chamber one-way valve 15, and the ignition coil bushing 132 is connected with an ignition coil 16; the intake pipe 10 is connected to the distributor 11 through a pipeline, and the distributor 11 is connected to the pre-combustion chamber one-way valve 15 through a pipeline; the pre-combustion body 12 is connected to the bushing assembly 13, and a pre-combustion chamber 9 is formed in the inner cavity of the pre-combustion body 12, and the pre-combustion chamber one-way valve 15 can connect or disconnect the intake pipe 10 with the pre-combustion chamber 9.

[0058] It should be noted that the cylinder is an important part of the engine, and the cylinder has four strokes, which are intake stroke, compression stroke, power stroke and exhaust stroke. During the intake stroke, the piston moves downward, and the intake valve opens; during the compression stroke, the piston moves upward, the intake valve closes, and the gas in the main combustion chamber is compressed; during the power stroke, the piston reaches the top dead center, the spark plug 14 ignites, the gas expands, and forces the piston to move downward; during the exhaust stroke, the piston reaches the bottom dead center, the exhaust valve opens, and the piston moves upward to discharge the burned gas out of the exhaust valve; during the intake stroke, the pressure difference between the intake pipe 10 and the pre-combustion chamber 9 and the gravity of the valve core 2 of the pre-combustion chamber check valve 15 cause the piston to move upward. The valve core 2 moves downward, and the combustible mixture gas in the intake pipe 10 enters the distributor 11 through the air intake pipe 17 described below. The distributor 11 is connected to the distribution pipe 18. The combustible mixture gas entering the distributor 11 is output through the distribution pipe 18 and passes through the pre-combustion chamber one-way valve 15 to enter the pre-combustion chamber 9. An equivalent mixture gas is taken from the intake pipe 10 as a scavenging medium to provide an appropriate amount of combustible mixture gas in the pre-combustion chamber 9. The pressure difference between the intake pipe 10 and the cylinder can also be used to achieve low-pressure scavenging of the pre-combustion chamber 9.

[0059] The pre-combustion chamber one-way valve 15 provided in the present application can output a vortex airflow, thereby avoiding incomplete scavenging near the spark plug 14 caused by the traditional scavenging structure, thereby avoiding the poor scavenging effect near the root part of the spark plug 14, and achieving scavenging near the spark plug 14, and achieving more thorough scavenging, avoiding the excessive retention of exhaust gas to greatly affect the initial ignition and jet process inside the pre-combustion chamber 9, further improving the engine working cycle capacity, reducing the difference in ignition atmosphere near the spark plug 14, and improving the stability of combustion stability.

[0060] Furthermore, the air inlet pipe 10 has at least one air intake port, which is connected to the distributor 11 via an air intake pipe 17 .

[0061] The purpose of providing at least one air intake port is to be able to connect the air intake pipe 17 to the distributor 11, so as to achieve air intake from the intake pipe 10. Multiple air intake ports can also be provided at different positions of the intake pipe 10 to achieve mixed gases with different components. For example, an air intake port can be provided in the diffuser section to output a combustible mixed gas of gas and air, and another air intake port can be provided in the pressure stabilizing section to output a combustible mixed gas of gas, air and EGR gas.

[0062] Furthermore, if Figure 4 As shown, the pre-combustion chamber one-way valve 15 is connected in parallel with the spark plug 14 in the spark plug bushing 131, and the height of the bottom of the pre-combustion chamber one-way valve 15 along the axial direction of the spark plug bushing 131 is higher than the height of the bottom of the spark plug 14 along the axial direction of the spark plug bushing 131.

[0063] The purpose of making the bottom height of the pre-combustion chamber one-way valve 15 higher than the bottom height of the spark plug 14 is to enable the combustible mixture gas output by the pre-combustion chamber one-way valve 15 to laterally purge the vicinity of the spark plug 14, so as to fully purge the vicinity of the spark plug 14, especially the electrode 19, and improve the scavenging efficiency.

[0064] The present application also relates to an engine, comprising: a turbocharger, a cylinder and the above-mentioned pre-combustion chamber system connected to the cylinder, the turbocharger comprising a compressor and a turbine, the compressor being connected to an intake pipe 10 for providing air to the intake pipe 10, and the turbine being connected to an exhaust pipe of the cylinder for exhaust gas discharge.

[0065] The cylinder includes a cylinder body, a cylinder head, a piston and a pre-combustion chamber system. The cylinder head is located at the top of the cylinder body, and the piston is arranged between the cylinder body and the cylinder head to form a main combustion chamber. The piston is located below the pre-combustion chamber 9. The main combustion chamber and the pre-combustion chamber 9 are arranged opposite to each other. The spark plug bushing 131 is provided with a spray hole, and the spray hole connects the main combustion chamber and the pre-combustion chamber 9; when the spark plug 14 can ignite the combustible mixture in the pre-combustion chamber 9, the combustible mixture in the pre-combustion chamber 9 flows into the main combustion chamber through the spray hole, further igniting the combustible mixture in the main combustion chamber.

[0066] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0067] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0068] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A pre-combustion chamber one-way valve, used in an engine to open and close the pre-combustion chamber, characterized in that: The invention comprises a valve body (1), a valve core (2) and a baffle (3); a valve hole (4) is provided in the valve body (1), the valve core (2) is movably connected to the valve hole (4), an output hole (5) is provided in the valve body (1) and is arranged below the valve hole (4), and a valve head end (7) of the valve core (2) can connect and disconnect the output hole (5) and the valve hole (4); an extended end (6) of the valve core (2) can extend out of the valve hole (4); the baffle (3) is connected to the extended end (6) to axially limit the valve core (2); a plurality of flow channel holes (8) leading to the output hole (5) are also provided in the valve body (1), and at least a part of the flow channel hole (8) has a spiral section (82) so that a spiral fluid channel is formed in the flow channel hole (8).

2. A pre-combustion chamber one-way valve according to claim 1, characterized in that: The flow channel hole (8) comprises a straight flow section (81) and a spiral section (82) connected to each other, wherein the straight flow section (81) is arranged on the upstream side of the flow channel hole (8), and the spiral section (82) is arranged on the downstream side of the flow channel hole (8), and when the valve core (2) is opened, the spiral section (82) can be connected to the output hole (5).

3. A pre-combustion chamber one-way valve according to claim 2, characterized in that: The valve hole (4) comprises a first guide hole (41) and a second guide hole (42) which are connected to each other; the length of the first guide hole (41) in the axial direction is smaller than the length of the direct current section (81); a first gap is formed between the first guide hole (41) and the valve core (2); one end of the second guide hole (42) is connected to the output hole (5); a second gap is formed between the second guide hole (42) and the valve core (2); the second gap is smaller than the first gap.

4. A pre-combustion chamber one-way valve according to claim 1, characterized in that: The flow channel hole (8) comprises a spiral section (82), one end of the spiral section (82) is connected to the top surface of the valve body (1), and the other end of the spiral section (82) can be connected to the output hole (5) when the valve core (2) is opened.

5. A pre-combustion chamber one-way valve according to claim 1, characterized in that: The helical angle between the helical section (82) and the axis of the valve core (2) ranges from 10° to 35°.

6. A pre-combustion chamber one-way valve according to claim 1, characterized in that: The rotation direction of the spiral section (82) is opposite to the rotation direction of the spray hole of the pre-combustion chamber (20).

7. A pre-combustion chamber system, based on a pre-combustion chamber check valve according to any one of claims 1 to 6, characterized in that: The pre-combustion chamber system comprises an intake pipe (10), a distributor (11), a pre-combustion body (12) and a bushing assembly (13); the bushing assembly (13) comprises a spark plug bushing (131) and an ignition coil bushing (132); a spark plug (14) and a pre-combustion chamber one-way valve (15) are connected in the spark plug bushing (131), and an ignition coil bushing (132) is connected in the ignition coil bushing (16); the intake pipe (10) is connected to the distributor (11) through a pipeline, and the distributor (11) is connected to the pre-combustion chamber one-way valve (15) through a pipeline; the pre-combustion body (12) is connected to the bushing assembly (13), and a pre-combustion chamber (20) is formed in the inner cavity of the pre-combustion body (12), and the pre-combustion chamber one-way valve (15) can connect or disconnect the intake pipe (10) and the pre-combustion chamber (20).

8. A pre-combustion chamber system according to claim 7, characterized in that: The air inlet pipe (10) has at least one air intake port, and the air intake port is connected to the distributor (11) via an air intake pipe (17).

9. A pre-combustion chamber system according to claim 8, characterized in that: The pre-combustion chamber one-way valve (15) is connected in parallel with the spark plug (14) in the spark plug bushing (131), and the height of the bottom of the pre-combustion chamber one-way valve (15) along the axial direction of the spark plug bushing (131) is higher than the height of the bottom of the spark plug (14) along the axial direction of the spark plug bushing (131).

10. An engine, characterized in that: include: A turbocharger, a cylinder and a pre-combustion chamber system as described in any one of claims 7 to 9 connected to the cylinder, wherein the turbocharger comprises a compressor and a turbine, the compressor being connected to the intake pipe (10) for providing air to the intake pipe (10), and the turbine being connected to the exhaust pipe of the cylinder for exhaust gas discharge.

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