Air escape valve assembly, engine air inlet system and engine assembly

Abstract

The utility model belongs to the technical field of engines, and discloses a snuffle valve assembly, an engine air inlet system and an engine assembly, the snuffle valve assembly comprises a snuffle valve, and the inlet end of the snuffle valve is connected with a valve front pipeline; the air release valve assembly further comprises an inner-layer pipe and an interlayer pipe, the inner-layer pipe is arranged in the valve front pipeline, the pipe wall of the inner-layer pipe is provided with a first communication structure, and the first communication structure is used for communicating the interior and the exterior of the inner-layer pipe, so that internal gas of the inner-layer pipe and external gas can interfere with each other, and the gas flow speed is reduced. The interlayer pipe is arranged between the valve front pipeline and the inner-layer pipe, and a second communicating structure is arranged on the pipe wall of the interlayer pipe and used for communicating the interior and the exterior of the interlayer pipe, so that gas between the interlayer pipe and the inner-layer pipe can interfere with gas outside the interlayer pipe, and the gas flow rate is further reduced; therefore, noise near the air escape valve is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a pressure relief valve assembly, an engine intake system and an engine assembly. Background Art

[0002] In order to increase the intake pressure of an engine, a supercharger is usually arranged in the engine intake pipeline to improve the power and torque of the engine. However, due to the large intake pressure, when the engine load decreases and the throttle opening rapidly decreases, the high-pressure gas between the supercharger and the throttle will impact the supercharger in the reverse direction, resulting in surge and easily causing damage to the supercharger. To this end, a common solution is to connect a pressure relief pipeline between the supercharger and the throttle, and a pressure relief valve is arranged on the pressure relief pipeline to discharge the high-pressure gas, so that the combined operation curve of the supercharger is far away from the surge area. However, during the gas discharge process, noise is likely to occur in the pressure relief valve and the pressure relief pipeline.

[0003] In order to reduce the noise of the pressure relief valve, the prior art provides a silencing device, which divides the inner part of the exhaust pipeline into an inner cavity and an outer cavity through a housing, a communication channel is arranged between the inner cavity and the outer cavity, and part of the gas will flow between the inner cavity and the outer cavity through the communication channel and interfere with the gas flowing in the inner cavity and the outer cavity originally, slowing down the gas flow rate, thereby reducing the noise. However, the problem with it is that the silencing device only involves the mutual interference between the gases in two chambers, and the interference is weak, so the silencing effect is poor. Summary of the Utility Model

[0004] According to one aspect of the utility model, the utility model provides a pressure relief valve assembly to solve the problem that the silencing device in the prior art only involves the mutual interference between the gases in two chambers, and the interference is weak, so the silencing effect is poor.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A pressure relief valve assembly, including a pressure relief valve, and a valve front pipeline is connected to the inlet end of the pressure relief valve;

[0007] The pressure relief valve assembly further includes:

[0008] An inner layer pipe, which is arranged inside the valve front pipeline, and a first communication structure is arranged on the pipe wall of the inner layer pipe, and the first communication structure is used to communicate the inside of the inner layer pipe with the outside;

[0009] A sandwich pipe, which is arranged between the valve front pipeline and the inner layer pipe, and a second communication structure is arranged on the pipe wall of the sandwich pipe, and the second communication structure is used to communicate the inside of the sandwich pipe with the outside.

[0010] As a preferred solution of the air release valve assembly, the first communication structure includes a plurality of first through-hole groups arranged at intervals along the axial direction of the inner layer pipe, and each of the plurality of first through-hole groups includes a plurality of first through-holes arranged at intervals along the circumferential direction of the inner layer pipe;

[0011] The second communication structure includes a plurality of second through-hole groups arranged at intervals along the axial direction of the interlayer pipe, and each of the plurality of second through-hole groups includes a plurality of second through-holes arranged at intervals along the circumferential direction of the interlayer pipe.

[0012] As a preferred solution of the air release valve assembly, the first through-hole is a long strip hole and extends along the axial direction of the inner layer pipe; and / or,

[0013] The second through-hole is a long strip hole and extends along the axial direction of the interlayer pipe.

[0014] As a preferred solution of the air release valve assembly, the outer wall of the interlayer pipe is connected to the inner wall of the pipeline in front of the valve through a plurality of first support partition plates, and the plurality of first support partition plates are arranged at intervals along the circumferential direction of the interlayer pipe; and / or,

[0015] The outer wall of the inner layer pipe is connected to the inner wall of the interlayer pipe through a plurality of second support partition plates, and the plurality of second support partition plates are arranged at intervals along the circumferential direction of the inner layer pipe.

[0016] As a preferred solution of the air release valve assembly, the air release valve assembly further includes a flow broadening pipe arranged inside the pipeline in front of the valve, the flow broadening pipe is located between the inner layer pipe and the air release valve, and has a first end close to the inner layer pipe and a second end close to the air release valve, the diameter of the first end is larger than that of the second end, and there is a return gap for gas flow between the flow broadening pipe and the pipeline in front of the valve.

[0017] As a preferred solution of the air release valve assembly, the outlet end of the air release valve is connected to a pipeline behind the valve, and the air release valve assembly further includes a muffler pipe behind the valve arranged inside the pipeline behind the valve, and the muffler pipe behind the valve has a plurality of muffler pipe through-hole groups arranged at intervals along its axial direction, and each of the plurality of muffler pipe through-hole groups includes a plurality of muffler pipe through-holes arranged at intervals along the circumferential direction of the muffler pipe behind the valve.

[0018] As a preferred solution of the air release valve assembly, the outer wall of the muffler pipe behind the valve is connected to the inner wall of the pipeline behind the valve through a connecting plate.

[0019] As a preferred solution of the air release valve assembly, a pipeline behind the valve is connected to the outlet end of the air release valve. Along the gas flow direction, the air release valve assembly further includes an expansion muffler pipeline located downstream of the pipeline behind the valve. The expansion muffler pipeline includes a first pipe section and a second pipe section. The gas flows through the first pipe section and the second pipe section in sequence. Along the gas flow direction, the diameter of the first pipe section gradually increases, and the diameter of the second pipe section gradually decreases.

[0020] According to another aspect of the present invention, there is provided an engine intake system for connecting to the intake end of an engine. The engine intake system includes the above-mentioned air release valve assembly. A pipeline in front of the valve is connected to the inlet end of the air release valve, and a pipeline behind the valve is connected to the outlet end of the air release valve. The engine intake system further includes:

[0021] A supercharger, the pipeline in front of the valve is connected to the outlet end of the supercharger, and the pipeline behind the valve is connected to the inlet end of the supercharger;

[0022] A throttle valve, whose inlet end is connected to the outlet end of the supercharger.

[0023] According to yet another aspect of the present invention, there is provided an engine assembly, including an engine and the above-mentioned engine intake system, and the engine intake system is connected to the intake end of the engine.

[0024] The beneficial effects of the present invention are:

[0025] The present utility model provides a pressure relief valve assembly, which includes a pressure relief valve. The inlet end of the pressure relief valve is connected to a pre-valve pipeline. The pressure relief valve further includes an inner layer pipe and a sandwich pipe. The inner layer pipe is arranged inside the pre-valve pipeline, and the pipe wall of the inner layer pipe is provided with a first communication structure for communicating the inside of the inner layer pipe with the outside, so that interference can occur between the gas inside the inner layer pipe and the outside gas, thereby slowing down the gas flow rate. The sandwich pipe is arranged between the pre-valve pipeline and the inner layer pipe, and the pipe wall of the sandwich pipe is provided with a second communication structure for communicating the inside of the sandwich pipe with the outside, so that interference can occur between the gas between the sandwich pipe and the inner layer pipe and the outside gas of the sandwich pipe, further slowing down the gas flow rate. In this pressure relief valve assembly, the gas inside the sandwich pipe can enter between the sandwich pipe and the inner layer pipe through the first communication structure and interfere with the gas between the sandwich pipe and the inner layer pipe; the gas between the sandwich pipe and the inner layer pipe can enter the inside of the inner layer pipe through the first communication structure and interfere with the gas inside the inner layer pipe. At the same time, the gas between the sandwich pipe and the inner layer pipe can also enter the outside of the sandwich pipe through the second communication structure and interfere with the outside gas of the sandwich pipe; the outside gas of the sandwich pipe can enter between the sandwich pipe and the inner layer pipe through the second communication structure and interfere with the gas between the sandwich pipe and the inner layer pipe. Through the above interference process, the overall gas flow rate inside the pre-valve pipeline can be reduced, and compared with the solution of only setting two chambers, the interference between gases is stronger and the sound absorption effect is better.

[0026] The present utility model also provides an engine intake system for connecting to the intake end of an engine. The engine intake system includes the above-mentioned pressure relief valve assembly. The inlet end of the pressure relief valve is connected to a pre-valve pipeline, and the outlet end is connected to a post-valve pipeline. The engine intake system further includes a supercharger and a throttle valve. The inlet end of the pressure relief valve is connected to a pre-valve pipeline, and the outlet end is connected to a post-valve pipeline; the pre-valve pipeline is connected to the outlet end of the supercharger, and the post-valve pipeline is connected to the inlet end of the supercharger; the inlet end of the throttle valve is connected to the outlet end of the supercharger. Interference can occur between the gas inside and outside the inner layer pipe of this pressure relief valve assembly, slowing down the gas flow rate. Interference can occur between the gas between the sandwich pipe and the inner layer pipe and the outside gas of the sandwich pipe, further slowing down the gas flow rate, thereby reducing the noise near the pressure relief valve.

[0027] The present utility model also provides an engine assembly, which includes an engine and the above-mentioned engine intake system. The engine intake system is connected to the intake end of the engine. In this engine assembly, the noise near the pressure relief valve is relatively low, which is beneficial to improving the NVH performance of the engine assembly. Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of the engine intake system in an embodiment of the present utility model;

[0029] Figure 2 It is a schematic structural diagram of the air release valve assembly in an embodiment of the present utility model;

[0030] Figure 3 It is a schematic internal structure diagram of the pipeline in front of the valve in an embodiment of the present utility model Figure 1 ;

[0031] Figure 4 It is a schematic internal structure diagram of the pipeline in front of the valve in an embodiment of the present utility model Figure 2 ;

[0032] Figure 5 It is a schematic internal structure diagram of the pipeline behind the valve in an embodiment of the present utility model Figure 1 ;

[0033] Figure 6 It is a schematic internal structure diagram of the pipeline behind the valve in an embodiment of the present utility model Figure 2 。

[0034] In the figure:

[0035] 100, air release valve; 101, pipeline in front of the valve; 102, pipeline behind the valve; 103, signal pipeline; 200, supercharger; 300, throttle valve; 400, air intake port of the intake system; 500, air cleaner; 600, intercooler; 700, intake manifold; 1000, engine;

[0036] 1, inner layer pipe; 11, first through - hole group; 111, first through - hole;

[0037] 2, sandwich pipe; 21, second through - hole group; 211, second through - hole;

[0038] 31, first support and partition plate; 32, second support and partition plate;

[0039] 4, flow - broadening pipe; 41, third support and partition plate;

[0040] 5, silencing pipe behind the valve; 51, silencing - pipe through - hole group; 511, silencing - pipe through - hole; 52, first connecting plate;

[0041] 6, expansion and silencing pipeline; 61, first pipe segment; 62, second pipe segment; 63, third pipe segment. Specific embodiments

[0042] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present utility model and not for limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0043] In the description of the present utility model, unless otherwise clearly specified and defined, the terms "connected", "connected to", and "fixed" shall 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 or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. 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.

[0044] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0045] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for differentiation in description and have no special meanings.

[0046] In order to increase the intake pressure of the engine, a supercharger is usually provided in the engine intake pipeline to improve the power and torque of the engine. However, due to the relatively high intake pressure, when the engine load decreases and the throttle opening rapidly decreases, the high-pressure gas between the supercharger and the throttle will reverse and impact the supercharger, resulting in surging and easily causing damage to the supercharger. To address this, a common solution is to connect a pressure relief pipeline between the supercharger and the throttle, and a pressure relief valve is provided in the pressure relief pipeline to release the high-pressure gas, so that the combined operating curve of the supercharger is away from the surging area.

[0047] Refer to Figure 1, currently, a conventional engine intake system is used to connect to the intake end of an engine 1000. The engine intake system includes a relief valve 100, a supercharger 200, and a throttle valve 300. The inlet end of the relief valve 100 is connected to a pre-valve pipeline 101, and the outlet end is connected to a post-valve pipeline 102; the pre-valve pipeline 101 is connected to the outlet end of the supercharger 200, and the post-valve pipeline 102 is connected to the inlet end of the supercharger 200; the inlet end of the throttle valve 300 is connected to the outlet end of the supercharger 200. In addition, the relief valve 100 is a mechanical relief valve, and the valve core is driven by a spring. In the initial state, the spring drives the relief valve 100 to close. In addition, the relief valve 100 is also connected to a signal pipeline 103, and the signal pipeline 103 is connected to the outlet end of the throttle valve 300, that is, connected to the intake manifold 700. The gas in the intake manifold 700 and the spring are both used to push the valve core towards the position of closing the relief valve 100. In addition, the other end of the valve core is connected to the pre-valve pipeline 101. When the gas pressure in the pre-valve pipeline 101 is greater than the sum of the gas pressure in the intake manifold 700 and the elastic force of the spring, the gas in the pre-valve pipeline 101 pushes the valve core towards the position of opening the relief valve 100. At this time, the relief valve 100 is opened passively, and the gas between the supercharger 200 and the throttle valve 300 flows out successively through the pre-valve pipeline 101 and the relief valve 100, and is discharged to the post-valve pipeline 102. As the high-pressure gas is discharged, the gas pressure in the pre-valve pipeline 101 decreases, and the opening degree of the relief valve 100 decreases. Due to the pulsation of the gas pressure in the intake manifold 700, when the opening degree of the relief valve 100 drops to a certain extent, the valve core and the spring system form an oscillator system and vibrate, and at the same time, the gas pressure in the pre-valve pipeline 101 pulsates. Seriously, a large boundary layer separation will occur at one end of the pre-valve pipeline 101 close to the valve core, and part of the gas will flow back, generating a serious dipole noise source in the pre-valve pipeline 101.

[0048] In order to reduce the noise of the relief valve, the prior art provides a silencing device, which divides the interior of the exhaust pipeline into an inner cavity and an outer cavity through a housing. A communication channel is provided between the inner cavity and the outer cavity. Part of the gas will flow between the inner cavity and the outer cavity through the communication channel and interfere with the gas originally existing in the inner cavity and the outer cavity, slowing down the gas flow rate, thereby reducing the noise. However, the problem is that the silencing device only involves the mutual interference between the gases in two chambers, and the interference is weak, so the silencing effect is poor.

[0049] In view of the above problems, this embodiment provides a relief valve assembly to solve the problem that the silencing device in the prior art only involves the mutual interference between the gases in two chambers, and the interference is weak, so the silencing effect is poor, and it can be used in the field of engine technology.

[0050] Refer to Figures 2 - 6, the air release valve assembly includes an air release valve 100, and a pipeline 101 is connected to the inlet end of the air release valve 100; the air release valve assembly includes an inner layer pipe 1 and a sandwich pipe 2. The inner layer pipe 1 is arranged inside the pipeline 101 in front of the valve, and a first communication structure is provided on the pipe wall of the inner layer pipe 1. The first communication structure is used to communicate the inside of the inner layer pipe 1 with the outside, so that the gas inside the inner layer pipe 1 can interfere with the outside gas, thereby slowing down the gas flow rate. The sandwich pipe 2 is arranged between the pipeline 101 in front of the valve and the inner layer pipe 1, and a second communication structure is provided on the pipe wall of the sandwich pipe 2. The second communication structure is used to communicate the inside of the sandwich pipe 2 with the outside, so that the gas between the sandwich pipe 2 and the inner layer pipe 1 can interfere with the outside gas of the sandwich pipe 2, further slowing down the gas flow rate. In this air release valve assembly, the gas inside the sandwich pipe 2 can enter between the sandwich pipe 2 and the inner layer pipe 1 through the first communication structure and interfere with the gas between the sandwich pipe 2 and the inner layer pipe 1; the gas between the sandwich pipe 2 and the inner layer pipe 1 can enter the inside of the inner layer pipe 1 through the first communication structure and interfere with the gas inside the inner layer pipe 1. At the same time, the gas between the sandwich pipe 2 and the inner layer pipe 1 can also enter the outside of the sandwich pipe 2 through the second communication structure and interfere with the outside gas of the sandwich pipe 2; the outside gas of the sandwich pipe 2 can enter between the sandwich pipe 2 and the inner layer pipe 1 through the second communication structure and interfere with the gas between the sandwich pipe 2 and the inner layer pipe 1. Through the above interference process, the overall gas flow rate inside the pipeline 101 in front of the valve can be reduced, and compared with the solution of only setting two chambers, the interference between gases is stronger and the sound absorption effect is better.

[0051] Continue to refer to Figures 2 - 6 , the first communication structure includes a plurality of first through-hole groups 11 arranged at intervals along the axial direction of the inner layer pipe 1. Each of the plurality of first through-hole groups 11 includes a plurality of first through-holes 111 arranged at intervals along the circumferential direction of the inner layer pipe 1, so as to make the plurality of first through-holes 111 distributed as evenly as possible on the pipe wall of the inner layer pipe 1. The gas can enter and exit the inner layer pipe 1 through the plurality of first through-holes 111 of the plurality of first through-hole groups 11, making the gas flow more balanced. The second communication structure includes a plurality of second through-hole groups 21 arranged at intervals along the axial direction of the sandwich pipe 2. Each of the plurality of second through-hole groups 21 includes a plurality of second through-holes 211 arranged at intervals along the circumferential direction of the sandwich pipe 2, so as to make the plurality of second through-holes 211 distributed as evenly as possible on the pipe wall of the sandwich pipe 2. The gas can enter and exit the sandwich pipe 2 through the plurality of second through-holes 211 of the plurality of second through-hole groups 21, making the gas flow more balanced.

[0052] As an alternative, the first communication structure includes a plurality of first through holes, and the plurality of first through holes are arranged in a spiral shape on the tube wall of the inner layer tube 1, which can also evenly distribute the plurality of first through holes on the tube wall of the inner layer tube 1. Similarly, the second communication structure includes a plurality of second through holes, and the plurality of second through holes are arranged in a spiral shape on the tube wall of the sandwich tube 2, which can also evenly distribute the plurality of second through holes on the tube wall of the inner layer tube 1.

[0053] Continuing to refer to Figures 2 - 6 , in this embodiment, the first through hole 111 is a long strip hole and extends along the axial direction of the inner layer tube 1. Since most of the gas inside and outside the inner layer tube 1 flows along the axial direction of the inner layer tube 1, such a setting can enable more gas to diffuse into the first through hole 111, increasing the gas flow rate of the first through hole 111, thereby increasing the interference effect; and / or, the second through hole 211 is a long strip hole and extends along the axial direction of the sandwich tube 2. Since most of the gas inside and outside the sandwich tube 2 also flows along the axial direction of the sandwich tube 2, such a setting can enable more gas to diffuse into the second through hole 211, increasing the gas flow rate of the second through hole 211, thereby increasing the interference effect. This embodiment exemplarily gives a solution where the first through hole 111 is a long strip hole and the second through hole 211 is a long strip hole. In other embodiments, the first through hole 111 and the second through hole 211 can also be both set as circular holes.

[0054] Continuing to refer to Figures 2 - 6 , the outer wall of the sandwich tube 2 and the inner wall of the pre-valve pipeline 101 are connected by a plurality of first support partition plates 31. The plurality of first support partition plates 31 are arranged at intervals along the circumferential direction of the sandwich tube 2. On the one hand, it can play a role in stably supporting the sandwich tube 2. On the other hand, it can also divide the external space of the sandwich tube 2 into a plurality of flow channels, which can integrate the gas flow, make the gas flow velocities at different positions outside the sandwich tube 2 more balanced, and also make the sound absorption ability of the gas in the circumferential direction of the sandwich tube 2 more average; and / or, the outer wall of the inner layer tube 1 and the inner wall of the sandwich tube 2 are connected by a plurality of second support partition plates 32. The plurality of second support partition plates 32 are arranged at intervals along the circumferential direction of the inner layer tube 1. On the one hand, it can play a role in stably supporting the inner layer tube 1. On the other hand, it can also divide the sandwich space between the sandwich tube 2 and the inner layer tube 1 into a plurality of flow channels, which can integrate the gas flow, make the gas flow velocities at different positions between the sandwich tube 2 and the inner layer tube 1 more balanced, and also make the sound absorption ability of the gas in the circumferential direction of the inner layer tube 1 more average. This embodiment exemplarily gives a solution of simultaneously setting a plurality of first support partition plates 31 and a plurality of second support partition plates 32, and in this embodiment, the plurality of first support partition plates 31 are arranged in a radial pattern, and the plurality of second support partition plates 32 are also arranged in a radial pattern.

[0055] Continuing to refer to Figures 2 - 6, the air release valve assembly further includes a flow broadening tube 4 disposed inside the pre-valve pipeline 101. The flow broadening tube 4 is located between the inner layer tube 1 and the air release valve 100, and has a first end close to the inner layer tube 1 and a second end close to the air release valve 100. The diameter of the first end is larger than that of the second end. There is a return gap for gas flow between the flow broadening tube 4 and the pre-valve pipeline 101. Thus, when most of the gas flows from the inner layer tube 1 towards the air release valve 100, most of the gas will flow into the interior of the flow broadening tube 4. And as the diameter of the flow broadening tube 4 decreases, the pressure gradually increases, while the gas pressure in the return gap outside the flow broadening tube 4 is relatively small. If the valve core and spring of the air release valve 100 start to vibrate, causing some gas to flow back, due to the relatively high air pressure inside the second end of the flow broadening tube 4 and the relatively low air pressure outside, the returned gas will preferentially flow towards the return gap, thus forming a loop, so that the gas flowing from the inner layer tube 1 towards the air release valve 100 and the returned gas will not directly collide, thereby reducing noise.

[0056] Optionally, the flow broadening tube 4 is connected to the inner wall of the pre-valve pipeline 101 through a third support partition plate 41. Further, in order to improve the stability of the support, there are multiple third support partition plates 41, and the multiple third support partition plates 41 are radially and spacedly arranged on the outer peripheral wall of the flow broadening tube 4. In addition, since the flow direction of the returned air flow is relatively chaotic, such an arrangement can also divide the outside of the flow broadening tube 4 into several gas flow channels, thereby integrating the returned gas and making the gas flow more orderly.

[0057] In a traditional engine intake system, the outlet end of the air release valve 100 is connected to a post-valve pipeline 102. During the air release process of the air release valve 100, the gas flow rate in the post-valve pipeline 102 will also increase, and certain noise will also be generated.

[0058] Regarding this, continue to refer to Figures 2 - 6 , the air release valve assembly further includes a post-valve silencing tube 5 disposed inside the post-valve pipeline 102. The post-valve silencing tube 5 has a plurality of groups of silencing tube through holes 51 spaced along its axial direction. Each of the plurality of groups of silencing tube through holes 51 includes a plurality of silencing tube through holes 511 spaced along the circumferential direction of the post-valve silencing tube 5. Thus, part of the gas inside the post-valve silencing tube 5 can flow out of the post-valve silencing tube 5 through the silencing tube through holes 511 and flow back into the interior of the post-valve silencing tube 5 through other silencing tube through holes 511, interfering with the gas originally inside the post-valve silencing tube 5 to achieve the effect of noise reduction.

[0059] Continue to refer to Figures 2 - 6, the outer wall of the post-valve silencing pipe 5 is connected to the inner wall of the post-valve pipeline 102 through a connecting plate, thereby stably installing the post-valve silencing pipe 5 on the inner wall of the post-valve pipeline 102. Specifically, there are two connecting plates, namely the first connecting plate 52 and the second connecting plate. Among them, along the gas flow direction, the outer wall of the upstream end of the post-valve silencing pipe 5 is connected to the inner wall of the post-valve pipeline 102 through the first connecting plate 52, and the outer wall of the downstream end of the post-valve silencing pipe 5 is connected to the inner wall of the post-valve pipeline 102 through the second connecting plate. And both the first connecting plate 52 and the second connecting plate are closed structures that can prevent gas from passing through. With such a setting, the gas in the post-valve pipeline 102 can only enter the interior of the post-valve silencing pipe 5 from one end opening of the post-valve silencing pipe 5 and cannot directly enter the outside of the post-valve silencing pipe 5, which can greatly reduce the gas flow rate outside the post-valve silencing pipe 5, thereby achieving noise reduction. This post-valve silencing pipe 5 can be used to reduce high-frequency noise.

[0060] Continue to refer to Figures 2 - 6 , along the gas flow direction, the air release valve assembly further includes an expansion silencing pipeline 6 located downstream of the post-valve pipeline 102. The expansion silencing pipeline 6 includes a first pipe section 61 and a second pipe section 62. The gas flows through the first pipe section 61 and the second pipe section 62 in sequence. Along the gas flow direction, the diameter of the first pipe section 61 gradually increases, and the diameter of the second pipe section 62 gradually decreases, so that the internal volume of the gas gradually increases when flowing through the first pipe section 61, the flow rate and pressure decrease, the sound impedance changes, and the sound energy attenuates, so as to achieve the purpose of controlling the low-frequency noise energy. This expansion silencing pipeline 6 can be used to reduce low-frequency noise. Optionally, in order to simplify the structure, the second connecting plate simultaneously constitutes a part of the expansion silencing pipeline 6, specifically the first pipe section 61 of the expansion silencing pipeline 6.

[0061] Optionally, the expansion silencing pipeline 6 further includes a third pipe section 63 located between the first pipe section 61 and the second pipe section 62. Along the gas flow direction, the first pipe section 61, the third pipe section 63, and the second pipe section 62 are connected in sequence, and the diameter of the third pipe section 63 remains unchanged, so that after the gas flow rate and pressure decrease, the gas will still remain in the third pipe section 63 for a certain period of time to stabilize the gas flow rate.

[0062] This embodiment also provides an engine intake system for connecting to the intake end of the engine 1000. The engine intake system includes the above-mentioned blow-off valve assembly. In the blow-off valve assembly, the inlet end of the blow-off valve 100 is connected to a pre-valve pipeline 101, and the outlet end is connected to a post-valve pipeline 102. The engine intake system further includes a supercharger 200 and a throttle valve 300. The pre-valve pipeline 101 is connected to the outlet end of the supercharger 200, and the post-valve pipeline 102 is connected to the inlet end of the supercharger 200; the inlet end of the throttle valve 300 is connected to the outlet end of the supercharger 200, and the outlet end of the throttle valve 300 is connected to the engine 1000 through an intake manifold 700. The blow-off valve 100 is also connected to a signal pipeline 103, and the signal pipeline 103 is connected to the outlet end of the throttle valve 300, that is, connected to the intake manifold 700. The gas in the intake manifold 700 and the spring are both used to push the valve core towards the position of closing the blow-off valve 100. When the gas pressure in the pre-valve pipeline 101 is greater than the sum of the gas pressure in the intake manifold 700 and the elastic force of the spring, the gas in the pre-valve pipeline 101 pushes the valve core towards the position of opening the blow-off valve 100. The gas inside the inner tube 1 of the blow-off valve assembly can interfere with the external gas, slowing down the gas flow rate. The gas between the sandwich tube 2 and the inner tube 1 can interfere with the external gas of the sandwich tube 2, further slowing down the gas flow rate, thereby reducing the noise near the blow-off valve 100.

[0063] Continue to refer to Figure 1 , the engine intake system further includes an air filter 500. The inlet end of the air filter 500 has an air intake port 400 for the intake system. The outlet end of the air filter 500 is connected to the post-valve pipeline 102 and the inlet end of the supercharger 200. The air intake port 400 is used for gas to enter, and the air filter 500 is used to filter impurities in the air.

[0064] Continue to refer to Figure 1 , the engine intake system further includes an intercooler 600. The inlet end of the intercooler 600 is connected to the outlet end of the supercharger 200, and the outlet end of the intercooler 600 is connected to the pre-valve pipeline 101 and the inlet end of the throttle valve 300. The intercooler 600 is used to reduce the temperature of the high-temperature air supercharged by the supercharger 200 to reduce the heat load of the engine 1000.

[0065] This embodiment also provides an engine assembly, including the engine 1000 and the above-mentioned engine intake system. The engine intake system is connected to the intake end of the engine 1000. In this engine assembly, the noise near the blow-off valve 100 is relatively low, which is beneficial to improving the NVH (Noise, Vibration, Harshness) performance of the engine assembly.

[0066] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A gas relief valve assembly, comprising a gas relief valve (100), wherein an inlet end of the gas relief valve (100) is connected to a pre-valve pipeline (101); Characterized in that, The air relief valve assembly also includes: An inner tube (1) is arranged inside the pre-valve pipeline (101), and a tube wall of the inner tube (1) is provided with a first communication structure, wherein the first communication structure is used to connect the inside of the inner tube (1) with the outside; The sandwich tube (2) is arranged between the pre-valve pipeline (101) and the inner tube (1), and the tube wall of the sandwich tube (2) is provided with a second connecting structure, and the second connecting structure is used to connect the inside of the sandwich tube (2) with the outside.

2. The air release valve assembly according to claim 1, wherein The first connecting structure comprises a plurality of first through hole groups (11) arranged at intervals along the axial direction of the inner layer tube (1), and each of the plurality of first through hole groups (11) comprises a plurality of first through holes (111) arranged at intervals along the circumferential direction of the inner layer tube (1); The second connecting structure comprises a plurality of second through hole groups (21) arranged at intervals along the axial direction of the sandwich tube (2), and each of the plurality of second through hole groups (21) comprises a plurality of second through holes (211) arranged at intervals along the circumferential direction of the sandwich tube (2).

3. The air release valve assembly according to claim 2, wherein The first through hole (111) is a long strip-shaped hole and extends along the axial direction of the inner tube (1); and / or, The second through hole (211) is a long strip-shaped hole and extends along the axial direction of the sandwich tube (2).

4. The air release valve assembly according to claim 1, wherein, The outer wall of the sandwich tube (2) and the inner wall of the pre-valve pipeline (101) are connected via a plurality of first supporting partition plates (31), and the plurality of first supporting partition plates (31) are arranged at intervals along the circumferential direction of the sandwich tube (2); and / or, The outer wall of the inner layer tube (1) and the inner wall of the sandwich tube (2) are connected via a plurality of second supporting partition plates (32), and the plurality of second supporting partition plates (32) are arranged at intervals along the circumferential direction of the inner layer tube (1).

5. The air release valve assembly according to any one of claims 1-4, characterized in that, The air relief valve assembly also includes a flow widening tube (4) arranged inside the pre-valve pipeline (101), the flow widening tube (4) is located between the inner layer tube (1) and the air relief valve (100), and has a first end close to the inner layer tube (1) and a second end close to the air relief valve (100), the diameter of the first end is larger than the diameter of the second end, and a reflux gap for gas flow is provided between the flow widening tube (4) and the pre-valve pipeline (101).

6. The air release valve assembly according to any one of claims 1-4, characterized in that, The outlet end of the air relief valve (100) is connected to a post-valve pipeline (102), and the air relief valve assembly also includes a post-valve silencer pipe (5) arranged inside the post-valve pipeline (102), and the post-valve silencer pipe (5) has a plurality of silencer pipe through-hole groups (51) arranged at intervals along its axial direction, and the plurality of silencer pipe through-hole groups (51) each include a plurality of silencer pipe through-holes (511) arranged at intervals along the circumferential direction of the post-valve silencer pipe (5).

7. The air release valve assembly according to claim 6, characterized in that, The outer wall of the post-valve silencer pipe (5) is connected to the inner wall of the post-valve pipeline (102) via a connecting plate.

8. The air release valve assembly according to any one of claims 1-4, characterized in that, The outlet end of the air release valve (100) is connected to a pipeline (102) behind the valve. Along the gas flow direction, the air release valve assembly further includes an expanding and silencing pipeline (6) located downstream of the pipeline (102) behind the valve. The expanding and silencing pipeline (6) includes a first pipe section (61) and a second pipe section (62). The gas flows through the first pipe section (61) and the second pipe section (62) in sequence. Along the gas flow direction, the diameter of the first pipe section (61) gradually increases, and the diameter of the second pipe section (62) gradually decreases.

9. Engine intake system, characterized in that, For connecting to the intake end of an engine (1000), the engine intake system includes the air release valve assembly according to any one of claims 1-8. The inlet end of the air release valve (100) is connected to a pipeline (101) in front of the valve, and the outlet end is connected to a pipeline (102) behind the valve. The engine intake system further includes: A supercharger (200), where the pipeline (101) in front of the valve is connected to the outlet end of the supercharger (200), and the pipeline (102) behind the valve is connected to the inlet end of the supercharger (200); A throttle valve (300), whose inlet end is connected to the outlet end of the supercharger (200).

10. Engine assembly, characterized in that, It includes an engine (1000) and the engine intake system according to claim 9, and the engine intake system is connected to the intake end of the engine (1000).

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