Non-coaxial pre-combustion chamber structure, pre-combustion chamber system and engine
By adopting a non-coaxial pre-combustion chamber structure, the inclined first chamber and second chamber design is used to guide the combustible mixed gas near the spark plug, solving the problem of poor scavenging effect caused by coaxial arrangement of the pre-combustion chamber, and achieving a more complete combustion and a more stable ignition process.
Patent Information
- Application Number
- CN202421972090.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The coaxially arranged pre-combustion chamber causes the fresh mixture to be attracted by the bottom of the pre-combustion chamber with low pressure. The high-speed area of the airflow is distributed far away from the side of the spark plug, making it difficult to reach near the spark plug, resulting in poor scavenging effect near the spark plug.
The non-coaxial pre-combustion chamber structure is adopted, including a first chamber and a second chamber that are connected. The first chamber is inclined above the second chamber, and the side wall of the first chamber is inclined toward the bottom wall. The angle between the side wall and the bottom wall is 120 to 150° to guide the combustible mixed gas to the vicinity of the spark plug.
The scavenging effect near the spark plug is improved, the adequacy and stability of combustion is improved, the exhaust temperature is reduced, and the scavenging capacity of the pre-combustion chamber is enhanced.
Smart Images
Figure CN222887056U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of construction machinery, and particularly relates to a non-coaxial pre-chamber structure, a pre-chamber system and an engine. Background Art
[0002] By utilizing the pressure difference between the intake pipe and the pre-chamber during the intake stroke through low-pressure active scavenging, during the intake process, scavenging is carried out by introducing an air flow from the intake passage into the pre-chamber. The intake passage is connected to the pre-chamber through a pipe, and a check valve is arranged in the middle of the pipe to control the connection between the intake passage and the pre-chamber.
[0003] However, there is one or more cavities in the existing pre-chambers, and they are coaxially arranged. For a pre-chamber with low-pressure active scavenging, the coaxially arranged pre-chamber will cause the fresh mixture flowing out of the check valve to be attracted by the bottom of the pre-chamber with a lower pressure. The high-speed area of the air flow is distributed on the side far from the spark plug and is difficult to reach near the spark plug, resulting in poor scavenging effect near the spark plug. Poor scavenging will cause residues of exhaust gas near the spark plug, especially at the root part. More residues of exhaust gas will greatly affect the initial ignition and jet processes inside the pre-chamber, resulting in a large difference in the working cycle ability of the engine and the ignition atmosphere near the spark plug, and unstable combustion. Summary of the Utility Model
[0004] The utility model provides a non-coaxial pre-chamber structure, a pre-chamber system and an engine to solve the problem that in a coaxially arranged pre-chamber, the fresh mixture flowing out of the check valve is attracted by the bottom of the pre-chamber with a lower pressure, the high-speed area of the air flow is distributed on the side far from the spark plug and is difficult to reach near the spark plug, resulting in poor scavenging effect near the spark plug.
[0005] The technical solution adopted by the utility model is as follows:
[0006] A non-coaxial pre-chamber structure includes a pre-chamber body, a pre-chamber is formed inside the pre-chamber body, and the pre-chamber includes a first chamber and a second chamber that are connected and communicate with each other; including a pre-chamber body, a pre-chamber is formed inside the pre-chamber body, and the pre-chamber includes a first chamber and a second chamber that are connected and communicate with each other; the second chamber is distributed vertically, the first chamber is inclined and arranged above the second chamber, the first chamber can be oppositely arranged with a check valve and a spark plug that are parallelly distributed in the cylinder, and one end of the spark plug can extend into the first chamber; the side of the first chamber opposite to the spark plug is inclined upward.
[0007] The non-coaxial pre-chamber structure of the utility model further has the following additional technical features:
[0008] The included angle between the axis of the first chamber and the axis of the second chamber is 10° - 30°.
[0009] The side wall of the first chamber is inclined relative to the bottom wall of the first chamber, and the included angle between the side wall and the bottom wall is 120° to 150°.
[0010] The side wall has an arc surface structure; alternatively, the side wall has a planar structure.
[0011] The bottom wall has a planar structure, and a flow hole is formed in the bottom wall; a flow channel hole communicating with the flow hole is provided at the top of the second chamber.
[0012] The height value of the projection of the side wall of the first chamber along the axis direction of the second chamber ranges from 10 mm to 20 mm.
[0013] A plurality of spray holes are provided in the second chamber, and the plurality of spray holes are spaced apart along the axis direction of the second chamber.
[0014] The present application relates to a pre-chamber system, including an intake pipe, a distributor, a bushing assembly, and a non-coaxial pre-chamber structure as described above; a spark plug and a one-way valve are connected inside the bushing assembly; the intake pipe is connected to the distributor through an extraction pipe, the distributor is connected to the one-way valve through a distribution pipe, the bushing assembly is connected to the pre-chamber, and the one-way valve can open and close the pre-chamber and the intake pipe.
[0015] The bushing assembly includes a spark plug bushing and an ignition coil bushing connected to each other. The spark plug and the one-way valve are connected inside the spark plug bushing, the ignition coil is connected inside the ignition coil bushing, the pre-chamber is connected below the spark plug bushing, and one end of the spark plug can extend from the spark plug bushing into the pre-chamber.
[0016] The present application further relates to an engine, including a turbocharger, a cylinder, and a pre-chamber system as described above connected inside the cylinder. The turbocharger includes a compressor and a turbine. The compressor is connected to the intake pipe to supply air to the intake pipe, and the turbine is 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 obtained by the present utility model are:
[0018] 1. The present application relates to a non-coaxial pre-chamber structure, including a pre-chamber body. A pre-chamber is formed inside the pre-chamber body. The pre-chamber includes a first chamber and a second chamber that are connected and communicate with each other; the inside of the pre-chamber is divided into two chambers distributed up and down, where the first chamber is located above the second chamber. The first chamber can be arranged relative to the one-way valve and the spark plug. Since the one-way valve and the spark plug are arranged in parallel, one side of the first chamber can be opposite to the one-way valve, and the other side of the first chamber can be opposite to the spark plug. The one-way valve can realize the connection or disconnection between the first chamber and the one-way valve. One end of the spark plug can extend into the first chamber to ignite the combustible mixture inside the pre-chamber;
[0019] The second chamber is distributed vertically. The first chamber is inclined with respect to the second chamber, and the side of the first chamber facing the spark plug is inclined upward. The purpose of this setting is that when the combustible mixture flows from one side of the first chamber to the other side through the opened one-way valve, the combustible mixture can be guided under the inclined action on the other side of the first chamber, so that the combustible mixture moves towards the spark plug, thereby realizing scavenging near the spark plug, especially at the root part, so as to fully scavenge the exhaust gas, improve combustion sufficiency and reduce the exhaust temperature; improve the scavenging effect of the pre-chamber, improve transient misfire, and improve scavenging near the spark plug; during the load step process, scavenging is sufficient, improving ignition stability; increasing ignition energy, increasing steady-state ignition energy, scavenging near the spark plug is more sufficient, the flow rate is high, the flame propagates fast, the proportion of cold jets is reduced, and the volume utilization rate of the pre-chamber is increased.
[0020] 2. As a preferred embodiment of the present invention, the included angle between the axis of the first chamber and the axis of the second chamber is 10° to 30°.
[0021] If the included angle between the axis of the first chamber and the axis direction of the second chamber is too small, it is easy to hinder the flow of the combustible mixture from the first chamber to the second chamber. If the included angle between the axis of the first chamber and the axis of the second chamber is too large, it is easy to cause the combustible mixture flowing through the first chamber not to flow near the spark plug. In order to smoothly guide the combustible mixture from the first chamber to the second chamber and enable it to flow near the spark plug during the process of flowing from the first chamber to the second chamber, the included angle between the axis of the first chamber and the axis of the second chamber is set to 10° to 30°.
[0022] 3. As a preferred embodiment of the present invention, the side wall of the first chamber is inclined with respect to the bottom wall of the first chamber, and the included angle between the side wall and the bottom wall is 120° to 150°.
[0023] The inner side wall of the first chamber is inclined at a preset angle with respect to the bottom wall, so that the side wall can guide the combustible mixture, and when the air flow enters the bottom wall along the side wall, it can be guided by the bottom wall. Since the side of the first chamber facing the spark plug is inclined upward, the combustible mixture has a certain upward trend along the bottom wall from the side opposite to the one-way valve to the side of the spark plug, thereby being able to scavenge near the spark plug and improving the full purge of the root part of the spark plug.
[0024] 4. As a preferred embodiment of the present invention, the side wall has an arc surface structure; or, the side wall has a flat surface structure.
[0025] For the structure of the inner side wall of the first chamber, an arc surface or a flat surface structure can be adopted. Among them, adopting an arc surface structure can further increase the area of the side wall of the first chamber, increase the flow area of the combustible mixture gas, enhance the scavenging ability of the combustible mixture gas, and achieve sufficient scavenging near the spark plug.
[0026] 5. As a preferred embodiment of the present utility model, the bottom wall has a flat surface structure, and a flow hole is provided on the bottom wall; the top of the second chamber has a flow channel hole communicating with the flow hole.
[0027] The bottom wall has a flat surface structure, and a flow hole is provided on the bottom wall. A flow channel hole is provided at the top of the second chamber, and the flow channel hole communicates with the flow hole so that the combustible mixture gas flowing through the first chamber can smoothly enter the second chamber through the flow hole and the flow channel hole. Brief Description of the Drawings
[0028] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:
[0029] Figure 1 It is a sectional structure diagram of a non-coaxial pre-chamber structure under an embodiment of the present utility model;
[0030] Figure 2 It is a side view structure diagram of a non-coaxial pre-chamber structure under an embodiment of the present utility model;
[0031] Figure 3 It is a schematic diagram of the internal gas flow direction of a non-coaxial pre-chamber structure under an embodiment of the present utility model;
[0032] Figure 4 It is a schematic diagram of the structure of a pre-chamber system under an embodiment of the present utility model;
[0033] Among them,
[0034] 1. Pre-chamber body; 2. Pre-chamber; 21. First chamber; 22. Second chamber; 3. Side wall; 4. Bottom wall; 5. Check valve; 6. Spark plug; 7. Inlet pipe; 8. Distributor;
[0035] 9. Bushing assembly; 91. Spark plug bushing; 92. Ignition coil bushing;
[0036] 10. Ignition coil; 11. Spray hole; 12. Distribution pipe; 13. Intake pipe; a - The included angle between the axis of the first chamber and the axis of the second chamber; b - The included angle between the side wall and the bottom wall; c - The first direction; h - The height of the projection of the side wall of the first chamber along the axis direction of the second chamber. Detailed implementation manners
[0037] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may be implemented in other ways different from those described herein. Therefore, the scope of protection of the present utility model is not limited by the specific embodiments disclosed below.
[0038] In addition, in the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "inner", "outer", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model.
[0039] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0040] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" 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 referring to terms such as "implementation manner", "embodiment", "an embodiment", "example", or "specific example", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.
[0041] Glossary:
[0042] Pre-chamber: Corresponding to the main combustion chamber, a small space is designed in the engine, and the ignition combustion therein forms a high-speed and high-temperature jet through the injection holes of the main combustion chamber to ignite the mixture in the main combustion chamber.
[0043] Passive pre-chamber: There is no separate fuel or air supply device in the pre-chamber to adjust the fuel ratio in the pre-chamber.
[0044] Active pre-chamber: There is a separate fuel or air supply device in the pre-chamber to adjust the fuel ratio in the pre-chamber.
[0045] Spark-ignition engine: The mixture is ignited in a certain way to generate flame propagation to achieve the engine's heat-work conversion process.
[0046] EGR: exhaust gas recirculation, a part of the exhaust gas is re-introduced into the intake air to reduce the knocking tendency of the engine and improve the thermal efficiency.
[0047] In order to more clearly illustrate the overall concept of the present invention, the following will be described in detail by way of examples in conjunction with the drawings in the specification.
[0048] The present invention relates to a non-coaxial pre-chamber structure, as Figures 1-4 shown, including a pre-chamber body 1. A pre-chamber 2 is formed inside the pre-chamber body 1. The pre-chamber 2 includes a first chamber 21 and a second chamber 22 that are connected and communicate with each other; the second chamber 22 is distributed vertically, the first chamber 21 is inclined and arranged above the second chamber 22, the first chamber 21 can be oppositely arranged with respect to a check valve 5 and a spark plug 6 that are parallelly distributed in the cylinder, and one end of the spark plug 6 can extend into the first chamber 21; one side of the first chamber 21 opposite to the spark plug 6 is inclined upward.
[0049] In this application, the pre-chamber 2 is divided into two chambers distributed vertically and horizontally. Among them, the first chamber 21 is located above the second chamber 22, and the first chamber 21 can be arranged relative to the check valve 5 and the spark plug 6. Since the check valve 5 and the spark plug 6 are arranged in parallel, one side of the first chamber 21 can be opposite to the check valve 5, and the other side of the first chamber 21 can be opposite to the spark plug 6. The check valve 5 can realize the connection or disconnection between the first chamber 21 and the check valve 5. One end of the spark plug 6 can extend into the first chamber 21 to ignite the combustible mixture in the pre-chamber 2; therefore, the main function of the first chamber 21 is to guide the combustible mixture output through the check valve 5 to blow near the spark plug 6, so as to improve the scavenging near the spark plug 6. The main function of the second chamber 22 is to store the combustible mixture for combustion and pressure accumulation.
[0050] The second chamber 22 is distributed vertically. The first chamber 21 is inclined with respect to the second chamber 22, and the side of the first chamber 21 facing the spark plug 6 is inclined upward. The purpose of this setting is that when the combustible mixture flows from one side of the first chamber 21 to the other side through the opened one-way valve 5, the combustible mixture can be guided under the inclined action on the other side of the first chamber 21, so that the combustible mixture moves towards the spark plug 6, thereby realizing scavenging near the spark plug 6, especially at the root part, so as to fully scavenge the exhaust gas, improve the combustion sufficiency and reduce the exhaust temperature; improve the scavenging effect of the pre-chamber 2, improve the transient misfire, and improve the scavenging near the spark plug 6; during the load step process, the scavenging is sufficient, improving the ignition stability; increasing the ignition energy, increasing the steady-state ignition energy, the scavenging near the spark plug 6 is more sufficient, the flow rate is high, the flame propagation is fast, the proportion of cold jets is reduced, and the volume utilization rate of the pre-chamber 2 is improved.
[0051] As Figure 3 shown, for the convenience of description, the description is made according to the orientation shown in the figure. The first chamber 21 is above the second chamber 22. The cross-sectional shape of the first chamber 21 is triangular, and the cross-sectional shape of the second chamber 22 is square. The first chamber 21 is inclined with respect to the second chamber 22. The first chamber 21 has a side wall 3 and a bottom wall 4. The side wall 3 is arranged on the left side of the second chamber 22. The bottom wall 4 of the first chamber 21 is inclined upward from left to right. The bottom wall 4 of the first chamber 21 can extend to the top surface of the pre-chamber 2. Above the left side of the first chamber 21 in Figure 3 is provided with a one-way valve 5, and above the right side of the first chamber 21 in Figure 3 is provided with a spark plug 6. The one-way valve 5 and the spark plug 6 are simply represented by a square box; in actual application, one end of the spark plug 6 can extend into the first chamber 21. As Figure 3 shown, the spark plug 6 is arranged relative to the second chamber 22, and the purpose is to be able to fully ignite the combustible mixture in the pre-chamber 2.
[0052] As a preferred embodiment, the included angle between the axis of the first chamber 21 and the axis of the second chamber 22 is 10° - 30°.
[0053] If the included angle a between the axis of the first chamber 21 and the axis direction of the second chamber 22 is too small, it is easy to hinder the flow of the combustible mixture from the first chamber 21 to the second chamber 22. If the included angle between the axis of the first chamber 21 and the axis of the second chamber 22 is too large, it is easy to cause the combustible mixture flowing through the first chamber 21 not to flow near the spark plug 6. In order to realize that the combustible mixture can be smoothly guided from the first chamber 21 to the second chamber 22 and can flow near the spark plug 6 during the process of flowing from the first chamber 21 to the second chamber 22, the included angle between the axis of the first chamber 21 and the axis of the second chamber 22 is set to 10° - 30°.
[0054] As a preferred embodiment, the side wall 3 of the first chamber 21 is inclined with respect to the bottom wall 4 of the first chamber 21, and the included angle b between the side wall 3 and the bottom wall 4 is 120° to 150°.
[0055] The side wall 3 in the first chamber 21 is inclined at a preset angle b with respect to the bottom wall 4, so that the side wall 3 can guide the combustible mixture gas, and when the air flow enters the bottom wall 4 along the side wall 3, it can be guided by the bottom wall 4. Since the side of the first chamber 21 opposite to the spark plug 6 is inclined upward, the combustible mixture gas has a certain upward trend along the bottom wall 4 from the side opposite to the one-way valve 5 to the side of the spark plug 6, so as to scavenge the area near the spark plug 6. By adjusting the angle between the side wall 3 and the bottom wall 4, the volume of the first chamber 21 can be adjusted, and the air flow can be guided, so that the combustible mixture gas can fully scavenge the area near the spark plug 6.
[0056] As a preferred embodiment, the side wall 3 has an arc surface structure; alternatively, the side wall 3 has a flat surface structure.
[0057] For the structure of the side wall 3 in the first chamber 21, an arc surface or a flat surface structure can be adopted. Among them, adopting an arc surface structure can further increase the area of the side wall 3 of the first chamber 21, increase the flow area of the combustible mixture gas, enhance the scavenging ability of the combustible mixture gas, and achieve full scavenging of the area near the spark plug 6.
[0058] As a preferred embodiment, the bottom wall 4 has a flat surface structure, and the bottom wall 4 is provided with a circulation hole; the top of the second chamber 22 has a flow passage hole communicating with the circulation hole.
[0059] The bottom wall 4 is provided with a circulation hole, and the top of the second chamber 22 is provided with a flow passage hole. The purpose of the flow passage hole communicating with the circulation hole is to enable the combustible mixture gas flowing through the first chamber 21 to smoothly enter the second chamber 22 through the circulation hole and the flow passage hole.
[0060] As a preferred embodiment, the height h of the projection of the side wall 3 of the first chamber 21 along the axial direction of the second chamber 22 ranges from 10 mm to 20 mm.
[0061] The main function of the first chamber 21 is to guide the combustible mixture output from the one-way valve 5 towards the vicinity of the spark plug 6, thereby improving the scavenging in the vicinity of the spark plug 6. The main function of the second chamber 22 is to store the combustible mixture for combustion pressure accumulation. By setting the height of the first chamber 21 within a certain range, the airflow flowing out of the one-way valve 5 can be guided by adjusting the height of the first chamber 21, and the airflow can also be guided by adjusting the angle between the side wall 3 and the bottom wall 4 of the first chamber 21, which can improve the volume of the first chamber 21 and enable the combustible mixture gas to sufficiently scavenge the vicinity of the spark plug 6.
[0062] As a preferred embodiment, the second chamber 22 is provided with a plurality of spray holes 11, and the plurality of spray holes 11 are spaced apart along the axial direction of the second chamber 22.
[0063] Before the spark plug 6 ignites, the airflow in the pre-chamber 2 flows in the first direction c. When the spark plug 6 inserted into the pre-chamber 2 ignites, high-temperature and high-pressure gas will be formed in the pre-chamber 2 and jet into the cylinder through the plurality of spray holes 11 of the pre-chamber 2 to ignite the fuel in the main combustion chamber and complete the ignition process.
[0064] This application relates to a pre-chamber system, as Figure 4 shown, including an intake pipe 7, a distributor 8, a bushing assembly 9, and the above-mentioned non-coaxial pre-chamber structure; a spark plug 6 and a one-way valve 5 are connected inside the bushing assembly 9; the intake pipe 7 is connected to the distributor 8 through an intake pipe 13, the distributor 8 is connected to the one-way valve 5 through a distribution pipe 12, the bushing assembly 9 is connected to the pre-chamber 2, and the one-way valve 5 can open and close the pre-chamber 2 and the intake pipe 7.
[0065] Utilizing the pressure difference between the intake pipe 7 and the cylinder, the equivalent mixture is taken from the intake pipe 7 as the scavenging working medium to provide an appropriate amount of combustible mixture gas in the pre-chamber 2, and it can also achieve directional scavenging of the spark plug 6, improve the scavenging effect of the root part of the spark plug 6, reduce the influence on the initial ignition and jet process inside the pre-chamber 2, improve the combustion stability of the engine, and improve the work capacity of the engine.
[0066] Furthermore, the bushing assembly 9 includes a spark plug bushing 91 and an ignition coil bushing 92 connected to each other. The spark plug 6 and the one-way valve 5 are connected inside the spark plug bushing 91, the ignition coil 10 is connected inside the ignition coil bushing 92, the pre-chamber 2 is connected below the spark plug bushing 91, and one end of the spark plug 6 can extend from the spark plug bushing 91 into the pre-chamber 2.
[0067] During the intake stroke, under the dual action of the pressure difference force between the intake pipe 7 and the pre-chamber 2 and the gravity of the valve core of the check valve 5, the valve core moves downward. The combustible mixture in the intake pipe 7 enters the distributor 8 through the intake pipe 13. The combustible mixture passing through the distributor 8 enters the pre-chamber 2 through the distribution pipe 12 and the check valve 5. The pre-chamber 2 can be arranged opposite to the main combustion chamber. The combustible mixture in the pre-chamber 2 is ignited by the spark plug 6, and the ignited combustible mixture enters the main combustion chamber to ignite the combustible mixture in the main combustion chamber.
[0068] This application also relates to an engine, which includes a turbocharger, a cylinder, and the above-mentioned pre-chamber system connected to the inside of the cylinder. The turbocharger includes a compressor and a turbine. The compressor is connected to the intake pipe 7 to supply air to the intake pipe 7, and the turbine is connected to the exhaust pipe of the cylinder for exhaust gas discharge.
[0069] The cylinder includes a cylinder block, a cylinder head, a piston, and a pre-chamber system. The cylinder head is located at the top of the cylinder block. The piston is arranged inside the cylinder block and forms a main combustion chamber with the cylinder head. The piston is located below the pre-chamber 2. The main combustion chamber is arranged opposite to the pre-chamber 2. The spark plug bushing 91 of the pre-chamber 2 is provided with a spray hole 11, and the spray hole 11 communicates the main combustion chamber with the pre-chamber 2. When the spark plug 6 can ignite the combustible mixture in the pre-chamber 2, the combustible mixture in the pre-chamber 2 flows into the main combustion chamber through the spray hole 11 to further ignite the combustible mixture in the main combustion chamber.
[0070] What is not described in this utility model can be realized by adopting or referring to the existing technology.
[0071] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments.
[0072] The above are only the embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.
Claims
1. A non-coaxial pre-combustion chamber structure, characterized in that: The invention comprises a pre-combustion chamber body (1), wherein a pre-combustion chamber (2) is formed in the pre-combustion chamber body (1), and the pre-combustion chamber (2) comprises a first chamber (21) and a second chamber (22) which are connected to each other; the second chamber (22) is distributed in the vertical direction, the first chamber (21) is arranged obliquely above the second chamber (22), the first chamber (21) can be arranged opposite to a one-way valve (5) and a spark plug (6) which are distributed in parallel in the cylinder, and one end of the spark plug (6) can extend into the first chamber (21); and the first chamber (21) is inclined upward on the side relative to the spark plug (6).
2. A non-coaxial pre-combustion chamber structure according to claim 1, characterized in that: The angle between the axis of the first chamber (21) and the axis of the second chamber (22) is 10° to 30°.
3. A non-coaxial pre-combustion chamber structure according to claim 1, characterized in that: The side wall (3) of the first chamber (21) is arranged to be inclined relative to the bottom wall (4) of the first chamber (21), and the angle between the side wall (3) and the bottom wall (4) is 120 to 150 degrees.
4. A non-coaxial pre-combustion chamber structure according to claim 3, characterized in that: The side wall (3) is a curved structure; or, the side wall (3) is a flat structure.
5. A non-coaxial pre-combustion chamber structure according to claim 3, characterized in that: The bottom wall (4) is a planar structure, and a flow hole is provided on the bottom wall (4); the top of the second chamber (22) has a flow channel hole connected to the flow hole.
6. A non-coaxial pre-combustion chamber structure according to claim 3, characterized in that: The height value of the projection of the side wall (3) of the first chamber (21) along the axial direction of the second chamber (22) ranges from 10 mm to 20 mm.
7. A non-coaxial pre-combustion chamber structure according to claim 1, characterized in that: The second chamber (22) is provided with a plurality of spray holes (14), and the plurality of spray holes (14) are distributed at intervals along the axial direction of the second chamber (22).
8. A pre-combustion chamber system, characterized in that: It comprises an intake pipe (7), a distributor (8), a bushing assembly (9) and a non-coaxial pre-combustion chamber structure as described in any one of claims 1 to 7; a spark plug (6) and a one-way valve (5) are connected inside the bushing assembly (9); the intake pipe (7) is connected to the distributor (8) via an air intake pipe (16), the distributor (8) is connected to the one-way valve (5) via a distribution pipe (15), the bushing assembly (9) is connected to the pre-combustion chamber (2), and the one-way valve (5) can open and close the pre-combustion chamber (2) and the intake pipe (7).
9. A pre-combustion chamber system according to claim 8, characterized in that: The bushing assembly (9) comprises a spark plug bushing (91) and an ignition coil bushing (92) connected to each other, a spark plug (6) and a one-way valve (5) are connected in the spark plug bushing (91), an ignition coil (13) is connected in the ignition coil bushing (92), a pre-combustion chamber (2) is connected below the spark plug bushing (91), and one end of the spark plug (6) can extend from the spark plug bushing (91) into the pre-combustion chamber (2).
10. An engine, characterized in that: The invention comprises a turbocharger, a cylinder and a pre-combustion chamber system as described in any one of claims 8 to 9 connected to the cylinder, wherein the turbocharger comprises a compressor and a turbine, the compressor is connected to an intake pipe (7) for providing air to the intake pipe (7), and the turbine is connected to an exhaust pipe of the cylinder for exhausting exhaust gas.