Split type active pre-combustion chamber air inlet pipe and engine

Abstract

The utility model relates to the technical field of engines, and particularly discloses a split type active pre-combustion chamber air inlet pipe and an engine, the split type active pre-combustion chamber air inlet pipe comprises a first pipe body, a second pipe body and a one-way valve, the first pipe body is provided with a first channel penetrating in the length direction of the first pipe body, and the second pipe body is provided with a second channel penetrating in the length direction of the second pipe body; the second pipe body is provided with a second channel penetrating in the length direction of the second pipe body, the first channel is communicated with the second channel, the first pipe body and the second pipe body are coaxially arranged, a first matching structure is arranged at the end, close to the second pipe body, of the first pipe body, and a second matching structure is arranged at the end, close to the first pipe body, of the second pipe body. The first matching structure makes contact with or is attached to the second matching structure, and the one-way valve is fixedly installed in the first channel and located at the end, away from the second channel, of the first channel. The first pipe body and the second pipe body are installed through contact or attachment of the first matching structure and the second matching structure, mechanical connection does not exist between the first pipe body and the second pipe body, the needed operation space is smaller when the cylinder cover is assembled, and therefore the assembling difficulty is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a split active pre-combustion chamber intake pipe and an engine. Background Art

[0002] A one-way valve is installed inside the active pre-combustion chamber intake pipe. During assembly, the one-way valve needs to be installed from one end and slide to the other end by gravity. During this process, the one-way valve slides a long distance, and it is very easy to deviate from the position after sliding into place, making assembly difficult.

[0003] To address this issue, the prior art provides a split active pre-combustion chamber intake duct. This splits the traditional structure into a first intake duct section and a second intake duct section. During assembly, the one-way valve is first assembled onto the first intake duct section. This significantly shortens the sliding distance of the one-way valve, making it easier to ensure accurate positioning after sliding into position. During assembly onto the cylinder head, the first and second intake duct sections are threadedly connected, reuniting them. Correspondingly, a seal is provided at the connection between the first and second intake duct sections. The threaded connection and the seal work together to seal the connection. This threaded connection requires more space to complete the installation process. However, in real-world scenarios, the available space near the installation location is limited, making assembly more challenging. Utility Model Content

[0004] The purpose of the utility model is to provide a split active pre-combustion chamber intake pipe and an engine, so as to solve the problem of relatively great assembly difficulty in the existing structure.

[0005] The utility model provides a split active pre-combustion chamber intake pipe, comprising a first tube body, a second tube body and a one-way valve, the first tube body being provided with a first channel running through it along its length direction, the second tube body being provided with a second channel running through it along its length direction, the first channel being communicated with the second channel, the first tube body and the second tube body being coaxially arranged, a first matching structure being provided at one end of the first tube body close to the second tube body, a second matching structure being provided at one end of the second tube body close to the first tube body, the first matching structure being in contact with or fitted with the second matching structure, and the one-way valve being fixedly installed in the first channel and being located at one end of the first channel away from the second channel.

[0006] As an optimal technical solution for the split active pre-combustion chamber intake pipe, the first matching structure is a first stop, the second matching structure is a second stop, one of the first stop and the second stop is an outer stop, and the other is an inner stop, and the outer stop and the inner stop can be positioned and matched.

[0007] As a preferred technical solution for the split-type active pre-combustion chamber intake pipe, the first stop and / or the second stop are provided with chamfers, and the chamfers are used to guide the first tube body and / or the second tube body.

[0008] As an optimal technical solution for the split active pre-combustion chamber intake pipe, the first matching structure is a first cone wall, the second matching structure is a second cone wall, one of the first cone wall and the second cone wall is an inner cone wall, and the other is an outer cone wall, and the inner cone wall and the outer cone wall can be positioned and matched.

[0009] As an optimal technical solution for the split active pre-combustion chamber intake pipe, the bevel angle of the first cone wall is 30°-60°, the bevel angle of the second cone wall is 30°-60°, and the bevel angle of the first cone wall is equal to the bevel angle of the second cone wall.

[0010] As an optimal technical solution for the split active pre-combustion chamber intake pipe, the bevel angles of the first conical wall and the second conical wall are both 38°.

[0011] As a preferred technical solution for the split active pre-combustion chamber intake pipe, the small ends of the first conical wall and / or the second conical wall are provided with rounded corners, and the rounded corners are used to guide the first tube body and / or the second tube body.

[0012] As a preferred technical solution for the split active pre-combustion chamber intake pipe, the second tube body is provided with an annular raised portion, and at least one sealing member is mounted on the raised portion.

[0013] As an optimal technical solution for the split active pre-combustion chamber intake pipe, the raised portion includes a first raised portion and a second raised portion, a first seal is installed on the first raised portion, and a second seal is installed on the second raised portion, and the first seal and the second seal are spaced apart along the length direction of the second tube body.

[0014] The utility model provides an engine, comprising a cylinder head and a split active pre-combustion chamber intake pipe of any of the above solutions, wherein the second pipe body is fixedly connected to the cylinder head.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a split active pre-combustion chamber intake pipe, in which the first pipe body and the second pipe body are installed by contacting or fitting with the first matching structure and the second matching structure. There is no mechanical connection between the two, so less operating space is required when assembling to the cylinder head, thereby reducing the difficulty of assembly.

[0017] The utility model provides an engine. By applying the split active pre-combustion chamber intake pipe of the utility model, smaller operating space requirements are required during the assembly process, which reduces the assembly difficulty and is also beneficial to the arrangement of other parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of a split active pre-combustion chamber intake pipe in the prior art;

[0019] Figure 2 This is a cross-sectional view of the split active pre-combustion chamber intake pipe in Example 1 of the present utility model;

[0020] Figure 3 This is a schematic diagram of the cooperation between the first stop and the second stop in the first embodiment of the present utility model;

[0021] Figure 4 This is a cross-sectional view of the split active pre-combustion chamber intake pipe in the second embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the cooperation between the first cone wall and the second cone wall in the second embodiment of the present invention.

[0023] In the picture:

[0024] 100, one-way valve; 200, first air inlet pipe section; 300, second air inlet pipe section;

[0025] 1. First tube body; 10. First channel; 101. Outlet; 11. First stop; 12. First cone wall;

[0026] 2. Second tube body; 20. Second channel; 21. Second stopper; 22. Second cone wall; 23. First raised portion; 24. Second raised portion; 25. Fixing portion;

[0027] 31. First sealing member; 32. Second sealing member. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific position, be constructed and operated in a specific position, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] The existing active pre-combustion chamber intake pipe is set as a split structure to facilitate the assembly of the one-way valve 100. Please refer to Figure 1 As shown, Figure 1This is a prior art example of a split active pre-combustion chamber intake duct structure, comprising a first intake duct section 200 and a second intake duct section 300. A one-way valve 100 is provided in the first intake duct section 200 to reduce assembly difficulty. The first intake duct section 200 and the second intake duct section 300 are threadedly connected, and a gasket is provided at the joint for sealing. The presence of a gasket for sealing and the threaded connection require more space for installation in the cylinder head. However, the available space near the installation location in actual scenarios is limited, so the prior art solution of threaded connection of the split structure still presents significant assembly difficulties.

[0033] In this regard, the present invention provides a split active pre-combustion chamber intake pipe to solve the problem of greater assembly difficulty in the structure in the prior art.

[0034] Example 1

[0035] like Figure 2-Figure 3 As shown, the present invention provides a split-type active pre-combustion chamber intake pipe, comprising a first tube body 1, a second tube body 2, and a one-way valve 100. The first tube body 1 is provided with a first channel 10 along its length, and the second tube body 2 is provided with a second channel 20 along its length. The first tube body 1 and the second tube body 2 are arranged coaxially, and the first channel 10 and the second channel 20 are connected and aligned. The first channel 10 and the second channel 20 together constitute an intake channel for combustible gas. The one-way valve 100 is fixedly installed in the first channel 10 and is located at the end of the first channel 10 away from the second channel 20. An outlet 101 is provided at the end of the first channel 10 away from the second channel 20. The one-way valve 100 is installed at the outlet 101 and is fixedly connected to the inner side wall of the first channel 10 by an interference fit. A first matching structure is provided at the end of the first tube body 1 close to the second tube body 2, and a second matching structure is provided at the end of the second tube body 2 close to the first tube body 1. The first matching structure is in contact with or in contact with the second matching structure. Installation is achieved by contacting or fitting the first and second mating structures, without any mechanical connection between them. Therefore, less operating space is required for assembly to the cylinder head, thereby reducing assembly difficulty. Furthermore, after the first and second mating structures are in contact or fit, the connection between them also has a certain sealing capability. In actual use scenarios, where the supply pressure of the combustible gas is relatively low, the connection between the first and second mating structures can meet the sealing requirements simply by contacting or fitting the first and second mating structures, without the need for a mechanical connection structure or independent seal.

[0036] Furthermore, in this embodiment, the first matching structure is the first stop 11, and the second matching structure is the second stop 21. One of the first stop 11 and the second stop 21 is an outer stop, and the other is an inner stop, and the outer stop and the inner stop can be positioned and matched. Specifically, the first stop 11 is an outer stop, and the second stop 21 is an inner stop. During the installation process, the second tube body 2 gradually approaches the first tube body 1, and the first stop 11 and the second stop 21 are positioned and matched by plugging until the corresponding surfaces of the first stop 11 and the second stop 21 fit together. During the matching process of the first stop 11 and the second stop 21, the first tube body 1 and the second tube body 2 are ensured to be coaxial, that is, the installation accuracy is guaranteed.

[0037] For details, please refer to Figure 3 As shown, chamfers are provided at the first stop 11 and / or the second stop 21, and the chamfers are used to align the first tube body 1 and / or the second tube body 2. Specifically, the chamfers can be provided only at the first stop 11 or the second stop 21, or at both the first stop 11 and the second stop 21. In this embodiment, chamfers are provided at both the first stop 11 and the second stop 21. During the assembly process, the two chamfers of the first stop 11 and the second stop 21 first come into contact. As the second tube body 2 continues to be inserted, the chamfers align the first tube body 1 and / or the second tube body 2, so that the first tube body 1 and the second tube body 2 are coaxial, and at the same time, the first stop 11 and the second stop 21 fit together.

[0038] Furthermore, the second tube body 2 is provided with an annular raised portion, on which at least one seal is mounted. The outer periphery of the raised portion is designed to mate with the cylinder head, and the seal is also provided as an annular structure, with a portion thereof protruding from the outer surface of the raised portion. When the second tube body 2 is in place, the seal seals the cylinder head and the second tube body 2, preventing the escape of combustible gas.

[0039] Optionally, the raised portion includes a first raised portion 23 and a second raised portion 24. The first raised portion 23 and the second raised portion 24 have different heights to accommodate the corresponding structure at the cylinder head installation location, ensuring effective fit between them. Accordingly, a first seal 31 is mounted on the first raised portion 23, and a second seal 32 is mounted on the second raised portion 24. The first seal 31 and the second seal 32 are spaced apart along the length of the second tube 2. The provision of the first seal 31 and the second seal 32 increases the sealing level and further ensures the sealing effect. The first seal 31 and the second seal 32 are preferably sealing rubber rings, and corresponding annular grooves are provided on the first raised portion 23 and the second raised portion 24, and the depth of the annular grooves is sufficient to be partially exposed in the annular grooves after the first seal 31 or the second seal 32 is assembled. The first seal 31 and the second seal 32 are respectively installed in the annular grooves on the first raised portion 23 and the second raised portion 24, and are partially exposed in the annular grooves, that is, the first seal 31 and the second seal 32 both protrude from the outer surfaces of the first raised portion 23 and the second raised portion 24, thereby achieving sealing through extrusion deformation during the assembly process.

[0040] Furthermore, a fixing portion 25 is provided at one end of the second tube body 2 away from the first tube body 1, i.e., the upper end of the second tube body 2. The fixing portion 25 is used to constrain the second tube body 2. In this embodiment, the second tube body 2 and the cylinder head are fixedly connected by a fastener. The fastener is sleeved on the fixing portion 25, and its outer end is provided with an external thread for threaded connection with the cylinder head. As the fastener is gradually screwed into the cylinder head, the fastener pushes the upper end of the first protrusion 23, applying downward pressure along the axial direction to the second tube body 2, thereby making the first matching structure and the second matching structure fit tightly. In addition, the fastener is sleeved on the fixing portion 25 to constrain the upper end of the second tube body 2 in its radial direction, and the lower end of the second tube body 2 is constrained in its radial direction by the second matching structure and the second matching structure, thereby avoiding large vibrations when the combustible gas passes through.

[0041] Example 2

[0042] To avoid redundant description, in this embodiment, only the differences from the first embodiment will be described. The difference between this embodiment and the first embodiment is that the first matching structure and the second matching structure in this embodiment are different from those in the first embodiment.

[0043] Specifically, if Figure 4-Figure 5As shown, in this embodiment, the first mating structure is the first cone wall 12, and the second mating structure is the second cone wall 22. One of the first cone wall 12 and the second cone wall 22 is an inner cone wall, and the other is an outer cone wall. The inner cone wall and the outer cone wall can be positioned and mated. Specifically, the first cone wall 12 is the inner cone wall, and the second cone wall 22 is the outer cone wall. During the installation process, the second tube body 2 gradually approaches the first tube body 1, and the first cone wall 12 and the second cone wall 22 are positioned and mated by plugging until the wall surfaces of the first cone wall 12 and the second cone wall 22 contact or fit. During the positioning and mating process of the first cone wall 12 and the second cone wall 22, the first tube body 1 and the second tube body 2 are ensured to be coaxial.

[0044] Optionally, the bevel angle of the first cone wall 12 is 30°-60°, such as 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59° or 60°. The oblique angle of the second conical wall 22 is 30°-60°, such as 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59° or 60°. The oblique angle of the first conical wall 12 is equal to the oblique angle of the second conical wall 22 to ensure that the wall surface of the first conical wall 12 and the wall surface of the second conical wall 22 can be reliably attached.

[0045] It is understood that the smaller the bevel angle of the first conical wall 12 and the second conical wall 22, the better the positioning effect and the higher the processing difficulty. Conversely, the larger the bevel angle of the first conical wall 12 and the second conical wall 22, the worse the positioning effect and the lower the processing difficulty. Therefore, considering the positioning effect and processing difficulty, in this embodiment, the bevel angle of the first conical wall 12 and the second conical wall 22 can be 36°, 37°, 38°, 39°, or 40°. Preferably, the bevel angle of the first conical wall 12 and the second conical wall 22 is 38°.

[0046] For details, please refer to Figure 5As shown, the small ends of the first conical wall 12 and / or the second conical wall 22 are provided with rounded corners, which are used to guide the first tube body 1 and / or the second tube body 2. Specifically, the rounded corners can be provided only at the small ends of the first conical wall 12 or the second conical wall 22, or at the small ends of both the first conical wall 12 and the second conical wall 22. In this embodiment, the rounded corners are provided only at the small ends of the first conical wall 12. During assembly, the rounded corners at the small ends of the first conical wall 12 first come into contact with the wall surfaces of the second conical wall 22. As the second tube body 2 continues to be inserted, the rounded corners guide the first tube body 1 and / or the second tube body 2 so that the first tube body 1 and the second tube body 2 are coaxial, and the first conical wall 12 and the second conical wall 22 are simultaneously fitted together.

[0047] The present invention further provides an engine comprising a cylinder head and a split active pre-combustion chamber intake pipe according to an embodiment of the present invention, wherein a second pipe body 2 is fixedly connected to the cylinder head. The use of the split active pre-combustion chamber intake pipe according to an embodiment of the present invention requires less operating space during assembly, reducing assembly difficulty while also facilitating the arrangement of other components.

[0048] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Split active pre-combustion chamber intake pipe, characterized in that: include: A first tube body (1), wherein the first tube body (1) is provided with a first passage (10) running through the first tube body along its length direction; A second tube body (2), wherein the second tube body (2) is provided with a second channel (20) extending along its length, the first channel (10) is connected to the second channel (20), the first tube body (1) and the second tube body (2) are coaxially arranged, the first tube body (1) is provided with a first matching structure at one end close to the second tube body (2), and the second tube body (2) is provided with a second matching structure at one end close to the first tube body (1), and the first matching structure is in contact with or in contact with the second matching structure; A one-way valve (100) is fixedly installed in the first channel (10) and is located at an end of the first channel (10) away from the second channel (20).

2. The split active pre-combustion chamber intake pipe according to claim 1, characterized in that: The first matching structure is a first stop (11), and the second matching structure is a second stop (21). One of the first stop (11) and the second stop (21) is an outer stop, and the other is an inner stop. The outer stop and the inner stop can be positioned and matched.

3. The split active pre-combustion chamber intake pipe according to claim 2, characterized in that: The first stop (11) and / or the second stop (21) are provided with chamfers, and the chamfers are used to guide the first tube body (1) and / or the second tube body (2).

4. The split active pre-combustion chamber intake pipe according to claim 1, characterized in that: The first matching structure is a first cone wall (12), and the second matching structure is a second cone wall (22). One of the first cone wall (12) and the second cone wall (22) is an inner cone wall, and the other is an outer cone wall. The inner cone wall and the outer cone wall can be positioned and matched.

5. The split active pre-combustion chamber intake pipe according to claim 4, characterized in that: The oblique angle of the first cone wall (12) is 30°-60°, the oblique angle of the second cone wall (22) is 30°-60°, and the oblique angle of the first cone wall (12) is equal to the oblique angle of the second cone wall (22).

6. The split active pre-combustion chamber intake pipe according to claim 5, characterized in that: The oblique angles of the first conical wall (12) and the second conical wall (22) are both 38°.

7. The split active pre-combustion chamber intake pipe according to claim 4, characterized in that: The small ends of the first conical wall (12) and / or the second conical wall (22) are provided with rounded corners, and the rounded corners are used to guide the first tube body (1) and / or the second tube body (2).

8. The split active pre-combustion chamber intake pipe according to any one of claims 1 to 7, characterized in that: The second tube body (2) is provided with an annular raised portion, and at least one sealing member is mounted on the raised portion.

9. The split active pre-combustion chamber intake pipe according to claim 8, characterized in that: The raised portion comprises a first raised portion (23) and a second raised portion (24); a first sealing member (31) is mounted on the first raised portion (23); a second sealing member (32) is mounted on the second raised portion (24); the first sealing member (31) and the second sealing member (32) are spaced apart along the length direction of the second tube body (2).

10. An engine including a cylinder head, characterized in that It also includes the split active pre-combustion chamber intake pipe according to any one of claims 1 to 9, and the second pipe body (2) is fixedly connected to the cylinder head.

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