Pre-combustion chamber air inlet pipe and engine

Abstract

The utility model relates to the technical field of engines, and particularly discloses a precombustion chamber air inlet pipe and an engine, the precombustion chamber air inlet pipe comprises a pipe body section, a one-way valve and a Tesla valve section, the pipe body section is provided with an air inlet channel, the one-way valve is arranged in the air inlet channel, the one-way valve is used for unidirectionally conducting the air inlet channel in the flowing direction of combustible gas, and the Tesla valve section is arranged in the pipe body section. The Tesla valve section is connected with the pipe body section and located on a communication flow path of the one-way valve and the pre-combustion chamber, an inlet of the Tesla valve section is communicated with the air inlet channel, and an outlet of the Tesla valve section is communicated to the pre-combustion chamber. The Tesla valve section is arranged on the communication flow path of the one-way valve and the pre-combustion chamber, the inlet of the Tesla valve section is communicated with the air inlet channel, and the outlet of the Tesla valve section is communicated to the pre-combustion chamber, so that the one-way valve is far away from the pre-combustion chamber, the damage probability of the one-way valve is reduced, and the service life is longer; and the high-temperature and high-pressure gas in the pre-combustion chamber is difficult to directly impact the gas inlet channel under the obstruction of the Tesla valve section.

Description

Technical Field

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

[0002] A one-way valve is installed inside the pre-combustion chamber intake pipe to control the flow direction of the combustible gas. The one-way valve is usually placed at the outlet of the pre-combustion chamber intake pipe to prevent the high-temperature, high-pressure gas in the pre-combustion chamber from flowing back into the pre-combustion chamber intake pipe. However, due to its proximity to the pre-combustion chamber, the different materials of the one-way valve components cause different deformation amounts at high temperatures. With the frequent impact of high-temperature, high-pressure gas, the one-way valve is more likely to be damaged or its service life will be shortened. Damage to the one-way valve will lead to a serious decline in engine performance. Utility Model Content

[0003] The purpose of the utility model is to provide a pre-combustion chamber intake pipe and an engine, so as to solve the problem that the one-way valve under the existing structure is easily damaged by the impact of high-temperature and high-pressure gas.

[0004] The utility model provides a pre-combustion chamber intake pipe, comprising a pipe body section, a one-way valve and a Tesla valve section, the pipe body section being provided with an intake channel, the intake channel being used to supply combustible gas to the pre-combustion chamber, the one-way valve being arranged in the intake channel, the one-way valve being used to unidirectionally guide the intake channel along the flow direction of the combustible gas, the Tesla valve section being connected to the pipe body section, and being located on the communicating flow path between the one-way valve and the pre-combustion chamber, the inlet of the Tesla valve section being communicated with the intake channel, and the outlet of the Tesla valve section being communicated with the pre-combustion chamber.

[0005] As an optimal technical solution for the pre-combustion chamber air intake pipe, the Tesla valve section is provided with a plurality of Tesla valve flow channels connected end to end, and the inlet and the outlet are connected through the plurality of Tesla valve flow channels.

[0006] As an optimal technical solution for the pre-combustion chamber intake pipe, the number of the Tesla valve flow channels is 3-6.

[0007] As an optimal technical solution for the pre-combustion chamber air intake pipe, the number of the Tesla valve flow channels is 4.

[0008] As a preferred technical solution for the pre-combustion chamber air intake pipe, the diameter ratio of the air intake channel to the inlet is 2-4.

[0009] As an optimal technical solution for the pre-combustion chamber air intake pipe, the Tesla valve section is detachably connected to the pipe body section.

[0010] As an optimal technical solution for the pre-combustion chamber air intake pipe, the air intake channel includes a first channel and a second channel connected to each other, the inlet is connected to the second channel, the first channel is located at the end of the pipe section away from the pre-combustion chamber, and the one-way valve is fixedly arranged in the first channel.

[0011] As a preferred technical solution for the pre-combustion chamber air intake pipe, the pipe body section is provided with an annular protrusion, and at least one sealing member is mounted on the protrusion.

[0012] As an optimal technical solution for the pre-combustion chamber air intake pipe, the protrusion includes a first protrusion and a second protrusion, a first seal is installed on the first protrusion, and a second seal is installed on the second protrusion, and the first seal and the second seal are spaced apart along the length direction of the tube body section.

[0013] The utility model provides an engine, comprising a cylinder head and a pre-combustion chamber air intake pipe of any one of the above solutions, wherein the pipe body section is fixedly connected to the cylinder head.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a pre-combustion chamber intake pipe, in which a Tesla valve section is arranged on the connecting flow path between the one-way valve and the pre-combustion chamber, and the inlet of the Tesla valve section is connected with the intake channel, and the outlet is connected to the pre-combustion chamber, so that the one-way valve is kept away from the pre-combustion chamber, reducing the probability of damage to the one-way valve and extending the service life. In addition, the high-temperature and high-pressure gas in the pre-combustion chamber is difficult to directly impact the intake channel under the obstruction of the Tesla valve section.

[0016] The utility model provides an engine. By applying the pre-combustion chamber intake pipe of the utility model, the probability of damage to the one-way valve is lowered, and the reliability of the engine is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a cross-sectional view of the pre-combustion chamber intake pipe in an embodiment of the present invention.

[0018] In the picture:

[0019] 1. One-way valve;

[0020] 2. Tube section; 21. First channel; 22. Second channel; 23. First protrusion; 24. Second protrusion; 25. Fixing portion;

[0021] 31. First sealing member; 32. Second sealing member;

[0022] 4. Tesla valve section; 41. Inlet; 42. Tesla valve flow channel; 421. Main channel; 422. Branch channel; 43. Outlet. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] like Figure 1As shown, the utility model provides a pre-combustion chamber intake pipe, comprising a pipe body section 2, a one-way valve 1 and a Tesla valve section 4. The pipe body section 2 is provided with an intake channel running through it in its axial direction, and the intake channel is used to supply combustible gas to the pre-combustion chamber. The one-way valve 1 is arranged in the intake channel and is used to guide the intake channel in a one-way direction along the flow direction of the combustible gas, on the one hand to control the flow direction of the combustible gas and avoid the backflow of the combustible gas. The Tesla valve section 4 is connected to the pipe body section 2 and is located on the connecting flow path between the one-way valve 1 and the pre-combustion chamber. Specifically, the Tesla valve section is connected to one end of the pipe body section 2 close to the pre-combustion chamber, the inlet 41 of the Tesla valve section 4 is connected to the intake channel, and the outlet 43 of the Tesla valve section 4 is connected to the pre-combustion chamber. The Tesla valve section 4 and the pipe body section 1 can be formed by integral casting, or they can be manufactured separately and then welded or connected by fasteners. By arranging a Tesla valve section 4 on the connecting flow path between the one-way valve 1 and the pre-combustion chamber, and the inlet 41 of the Tesla valve section 4 is connected to the intake channel, and the outlet 43 is connected to the pre-combustion chamber, the one-way valve 1 is kept away from the pre-combustion chamber, thereby reducing the probability of damage to the one-way valve 1 and extending its service life. In addition, the high-temperature and high-pressure gas in the pre-combustion chamber cannot directly impact the intake channel due to the obstruction of the Tesla valve section 4.

[0028] Furthermore, the Tesla valve section 4 is provided with a plurality of Tesla valve flow channels 42 connected end to end. The Tesla valve flow channels 42 include a main channel 421 and a branch channel 422. The length of the branch channel 422 is greater than that of the main channel 421. Both ends of the branch channel 422 are connected to the main channel 421. The main channels 421 of two adjacent Tesla valve flow channels 42 are connected. The inlet 41 and outlet 43 of the Tesla valve section 4 are connected through the plurality of Tesla valve flow channels 42. Specifically, the angle between one end of the branch channel 422 and the main channel 421 is greater than the angle between the other end and the main channel 421. Thus, the Tesla valve flow channels 42 are formed with corresponding large and small ends. The inlet 41 is connected to the large end of the first Tesla valve flow channel 42, and the outlet 43 is connected to the small end of the last Tesla valve flow channel 42. When the combustible gas flows from inlet 41 toward outlet 43, it splits and then rejoins at each Tesla valve channel 42. The Tesla valve channels 42 increase the flow rate, increasing the flow rate of the combustible gas at outlet 43, allowing the combustible gas to enter the pre-combustion chamber more quickly, thereby improving the response speed of the pre-combustion chamber intake pipe. Conversely, when the gas in the pre-combustion chamber burns, high-temperature, high-pressure gas enters through outlet 43 of the Tesla valve section 4 and splits and rejoins at the small end of the Tesla valve channel 42. At this time, the Tesla valve channel 42 blocks the high-temperature, high-pressure gas, reducing its flow rate and consuming energy. Due to the action of multiple Tesla valve channels 42, the temperature of the high-temperature, high-pressure gas decreases, and only a very small portion is able to enter the intake passage through inlet 41 of the Tesla valve section 4, thereby no longer impacting the intake passage. It is understandable that if the number of Tesla valve channels 42 is further increased, the high-temperature, high-pressure gas will be completely unable to enter the intake passage. The relevant principles of the Tesla valve flow channel 42 of the Tesla valve section 4 to achieve forward conduction and reverse blocking are existing technologies in this field and will not be described in detail here.

[0029] As the number of Tesla valve flow channels 42 increases, the length of the Tesla valve section 4 increases, and the overall axial length of the pre-combustion chamber intake pipe increases. In order to control the overall axial length of the pre-combustion chamber intake pipe within a reasonable range, the number of Tesla valve flow channels 42 is set to 3-6, for example, 3, 4, 5 or 6. In this embodiment, please refer to Figure 1 As shown, the number of Tesla valve flow channels 42 is preferably set to 4. On the one hand, it can effectively accelerate the combustible gas entering the pre-combustion chamber, and on the other hand, it can effectively avoid the high-temperature and high-pressure gas in the pre-combustion chamber from directly impacting the intake channel; at the same time, it also avoids the Tesla valve section 4 being too long, which causes the pre-combustion chamber intake pipe to occupy more axial space.

[0030] Furthermore, if Figure 1As shown, the diameter of the air intake channel is larger than the diameter of the inlet 41 of the Tesla valve section 4. Specifically, the ratio of the diameter of the air intake channel to the diameter of the inlet 41 of the Tesla valve section 4 is 2-4, for example, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9 or 4. In this embodiment, the ratio of the diameter of the air intake channel to the diameter of the inlet 41 of the Tesla valve section 4 is preferably 3.2. The diameter of the intake passage is set to be larger than the diameter of the inlet 41 of the Tesla valve section 4. On the one hand, after the combustible gas enters the Tesla valve section 4 from the intake passage, the inlet 41 of the Tesla valve section 4 throttles the combustible gas, thereby increasing the flow rate of the combustible gas. The flow rate of the combustible gas is further increased when it flows in the Tesla valve flow channel 42 of the Tesla valve section 4, and the flow rate when it finally enters the pre-combustion chamber is further increased, thereby further improving the response speed of the pre-combustion chamber intake pipe. On the other hand, even if the high-temperature and high-pressure gas in the pre-combustion chamber can pass through the outlet 43 of the Tesla valve section 4 and the Tesla valve flow channel 42 in sequence and enter the intake passage from the inlet 41 of the Tesla valve section 4, the diameter of the gas increases sharply after entering the intake passage from the inlet 41 of the Tesla valve section 4, which further slows down the flow rate of the gas and further reduces the risk of direct impact on the intake passage.

[0031] Optionally, the Tesla valve section 4 and the pipe body section 2 can be integrated, for example, by welding or integrally casting. The Tesla valve section 4 and the pipe body section 2 can also be detachably connected, for example, by threading, snapping, or the like. In this embodiment, the Tesla valve section 4 and the pipe body section 2 are preferably detachably connected, so that if damage occurs to the pipe body section 2 or the Tesla valve section 4, they can be replaced separately, avoiding the need for scrapping the entire section and reducing subsequent repair costs.

[0032] Specifically, if Figure 1As shown, the intake passage includes a first channel 21 and a second channel 22 that are interconnected. The first channel 21 and the second channel 22 are coaxially arranged. The first channel 21 is located at the end of the tubular body 2 away from the pre-combustion chamber, and the second channel 22 is located at the end of the tubular body 2 closer to the pre-combustion chamber. The inlet 41 of the Tesla valve section 4 is connected to the second channel 22. Accordingly, the ratio of the diameter of the second channel 22 to the inlet 41 of the Tesla valve section 4 is 2-4. The one-way valve 1 is fixedly disposed within the first channel 21, i.e., the one-way valve 1 is located at the upper end of the tubular body 2. The one-way valve 1 forms an interference fit with the inner sidewall of the first channel 21, thereby securing the one-way valve 1 within the first channel 21. During assembly, since the one-way valve 1 is located at the upper end of the tubular body 2, there is no need to slide the one-way valve 1 to the bottom of the tubular body 2. Once the one-way valve 1 is in place, its specific position is easier to observe and adjust. This makes the assembly process of the one-way valve 1 smoother and more efficient. In addition, the state of the one-way valve 1 after press-fitting is more likely to meet design requirements, thereby improving the yield rate.

[0033] Further, if Figure 1 As shown, the pipe body 2 is provided with an annular protrusion, on which at least one sealing member is mounted. The outer periphery of the protrusion is designed to mate with the cylinder head. The sealing member is also an annular structure, partially protruding from the outer surface of the protrusion. When the pipe body 2 is in place, the sealing member seals the cylinder head and pipe body 2, preventing the escape of combustible gas.

[0034] Optionally, the protrusions include a first protrusion 23 and a second protrusion 24. The first protrusion 23 and the second protrusion 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 protrusion 23, and a second seal 32 is mounted on the second protrusion 24. The first seal 31 and the second seal 32 are spaced apart along the length of the tubular section 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 protrusion 23 and the second protrusion 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 protrusion 23 and the second protrusion 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 protrusion 23 and the second protrusion 24, thereby achieving sealing through extrusion deformation during the assembly process.

[0035] Furthermore, a fixing portion 25 is provided at the upper end of the pipe section 2, which is used to constrain the pipe section 2. In this embodiment, the pipe section 2 and the cylinder head are fixedly connected via a fastener. The fastener is mounted on the fixing portion 25 and has an external thread at its outer end for threaded connection with the cylinder head. As the fastener is gradually screwed into the cylinder head, it pushes the upper end of the first protrusion 23, exerting downward pressure on the pipe section 2 along its axial direction, thereby pressing the pre-combustion chamber intake pipe into its installed position.

[0036] The present invention further provides an engine comprising a cylinder head and a pre-combustion chamber intake pipe according to an embodiment of the present invention, wherein the pipe body section 2 is fixedly connected to the cylinder head. By using the pre-combustion chamber intake pipe according to an embodiment of the present invention, the combustible gas enters the pre-combustion chamber at a faster rate, the probability of damage to the one-way valve 1 is reduced, and the reliability of the engine is improved.

[0037] 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. The pre-combustion chamber air intake pipe is characterized in that: include: A pipe body section (2), wherein the pipe body section (2) is provided with an air inlet passage, and the air inlet passage is used to supply combustible gas to the pre-combustion chamber; A one-way valve (1), the one-way valve (1) being arranged in the air inlet passage, the one-way valve (1) being used for unidirectionally conducting the air inlet passage along the flow direction of the combustible gas; A Tesla valve section (4), the Tesla valve section (4) is connected to the pipe body section (2) and is located on a communication flow path between the one-way valve (1) and the pre-combustion chamber, an inlet (41) of the Tesla valve section (4) is communicated with the air intake channel, and an outlet (43) of the Tesla valve section (4) is communicated with the pre-combustion chamber.

2. The pre-combustion chamber air intake pipe according to claim 1, characterized in that: The Tesla valve section (4) is provided with a plurality of Tesla valve flow channels (42) connected end to end, and the inlet (41) and the outlet (43) are communicated through the plurality of Tesla valve flow channels (42).

3. The pre-combustion chamber air intake pipe according to claim 2, characterized in that: The number of the Tesla valve flow channels (42) is 3-6.

4. The pre-combustion chamber air intake pipe according to claim 3, characterized in that: The number of the Tesla valve flow channels (42) is four.

5. The pre-combustion chamber air intake pipe according to claim 1, characterized in that: The ratio of the diameter of the air inlet channel to the diameter of the inlet (41) is 2-4.

6. The pre-combustion chamber air intake pipe according to claim 1, characterized in that: The Tesla valve section (4) is detachably connected to the pipe body section (2).

7. The pre-combustion chamber air intake pipe according to claim 1, characterized in that: The air intake channel comprises a first channel (21) and a second channel (22) which are connected to each other, the inlet (41) is connected to the second channel (22), the first channel (21) is located at an end of the pipe section (2) away from the pre-combustion chamber, and the one-way valve (1) is fixedly arranged in the first channel (21).

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

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

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

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