Pressure relief valve and engine system

Abstract

The present application provides a pressure relief valve and an engine system. The pressure relief valve includes a main body and a silencer structure. The main body is provided with a cavity, an air inlet connected to the cavity, and an air outlet connected to the cavity. The air inlet is arranged at the bottom of the cavity, and the air outlet is arranged at the side of the cavity. The silencer structure is arranged in the cavity and includes a flow spoiler; the flow spoiler turbules the gas entering the cavity through the air inlet, thereby reducing the acoustic energy of the gas. The engine system includes the pressure relief valve.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a pressure relief valve and an engine system. Background Art

[0002] A car's engine system consists of the engine, turbocharger, and pressure relief valve. The turbocharger's outlet is connected to the engine's intake manifold, while the turbocharger's intake is connected to the engine's exhaust manifold. When the engine is running, exhaust gas from the combustion chamber drives the turbocharger's turbine, which in turn rotates the coaxial impeller, drawing in outside air for supercharging. The supercharged air is then forced into the engine.

[0003] When the pressure of the gas discharged from the turbocharger into the pipeline is too high, the car's controller controls the pressure relief valve to open, and the excess gas is discharged through the pressure relief valve. The existing pressure relief valve has the problem of loud noise when the gas is discharged. Summary of the Invention

[0004] The present application provides a pressure relief valve and an engine system.

[0005] According to a first aspect of an embodiment of the present application, a pressure relief valve is provided, comprising:

[0006] A body, the body being provided with a cavity, an air inlet communicating with the cavity, and an air outlet communicating with the cavity, the air inlet being arranged at the end of the cavity, and the air outlet being arranged at the side of the cavity;

[0007] A sound-absorbing structure is arranged in the cavity, and the sound-absorbing structure includes a flow-disturbing portion; the flow-disturbing portion disturbs the gas entering the cavity through the air inlet, thereby reducing the sound energy of the gas.

[0008] In one embodiment, the pressure relief valve further includes an annular baffle and a sealing portion arranged in the cavity; the annular baffle is arranged around the air inlet; the sealing portion can move in the cavity to seal or open the end of the annular baffle away from the air inlet; the spoiler is arranged on the outside of the annular baffle.

[0009] In one embodiment, the silencer structure further includes a stopper arranged in the cavity, wherein the stopper is arranged at the air outlet, and part of the gas flowing toward the air outlet is blocked by the stopper; the gap between the lower end of the stopper and the inner wall of the cavity is connected to the air outlet.

[0010] In one embodiment, the sound-absorbing structure further includes a plurality of spaced-apart partitions, wherein the plurality of spaced-apart partitions are spaced-apart along the circumferential direction.

[0011] In one embodiment, the spoiler portion includes a plurality of spoiler structures, which are arranged at intervals in the axial direction of the cavity. The spoiler structures extend circumferentially and include at least one spoiler plate.

[0012] In one embodiment, the spoiler extends obliquely from a side close to the inner wall of the cavity to a side away from the inner wall of the cavity toward a direction away from the air inlet.

[0013] In one embodiment, the sound-absorbing structure further comprises a plurality of spaced-apart partitions, wherein the plurality of spaced-apart partitions are spaced-apart circumferentially, and the spoiler structure comprises a plurality of spoilers, wherein the spoilers and the spacers are alternately arranged.

[0014] In one embodiment, the spoiler includes an annular retaining wall and a plurality of protruding structures arranged on the inner wall of the annular retaining wall; the annular retaining wall is arranged around the air inlet, and the gap between the lower end of the annular retaining wall and the inner wall of the main body is connected to the air outlet; the protruding structure extends along the extension direction of the annular retaining wall, and a plurality of the protruding structures are arranged at intervals in the circumferential direction.

[0015] According to a second aspect of an embodiment of the present application, an engine system is provided, comprising an engine, a turbocharger, and the above-mentioned pressure relief valve, wherein the turbocharger is provided with a first air inlet port, a second air inlet port, and an air outlet port;

[0016] The first air intake port is communicated with the air outlet manifold of the engine, the air intake manifold of the engine is communicated with the air outlet port, the second air intake port is communicated with the atmosphere; the air intake port of the pressure relief valve is communicated with the air outlet port.

[0017] In one embodiment, the engine system further includes a cooler and an air filter; the air outlet port of the turbocharger is connected to the intake manifold of the engine through a pipeline, and the cooler is arranged on the pipeline; the second air intake port is connected to the atmosphere through the air filter; the air outlet of the pressure relief valve is connected between the air filter and the second air intake port;

[0018] The air inlet of the pressure relief valve is connected to the air outlet port, and the air inlet of the pressure relief valve is not connected to the pipeline, and the air outlet of the pressure relief valve is connected to the second air inlet port; or, the air inlet of the pressure relief valve is connected to the pipeline, the air inlet is connected between the air outlet port of the turbocharger and the cooler, and the air outlet of the pressure relief valve is connected between the air filter and the second air inlet port; or, the air inlet of the pressure relief valve is connected to the pipeline, the air inlet is connected between the cooler and the intake manifold of the engine, and the air outlet of the pressure relief valve is connected between the air filter and the second air inlet port.

[0019] The pressure relief valve and engine system provided in the embodiment of the present application are provided with a silencer structure in the cavity of the pressure relief valve. The silencer structure includes a flow-turbulating portion. After the gas enters the cavity through the air inlet, the flow-turbulating portion of the silencer structure disturbs the gas, thereby dissipating the sound energy of the gas and making less noise when the gas flows out through the air outlet. The flow-turbulating portion can also reduce the flow rate of the gas, which also helps to reduce the sound energy of the gas. It can be seen that the pressure relief valve provided in the embodiment of the present application can reduce the noise when the pressure relief valve is deflated.

[0020] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] Figure 1 A three-dimensional schematic diagram of a partial structure of a pressure relief valve provided in one embodiment of the present application;

[0023] Figure 2 A schematic perspective view of a pressure relief valve provided in an embodiment of the present application, cut longitudinally;

[0024] Figure 3 A partial cross-sectional view of a pressure relief valve provided in an embodiment of the present application, cut along the longitudinal direction;

[0025] Figure 4 A schematic diagram of a partial structure of a pressure relief valve provided in an embodiment of the present application, cut along the longitudinal direction;

[0026] Figure 5 A cross-sectional view of a pressure relief valve provided in one embodiment of the present application taken along a transverse direction;

[0027] Figure 6 A schematic diagram of the three-dimensional structure of a sound-absorbing structure provided in one embodiment of the present application;

[0028] Figure 7 A side view of a sound-absorbing structure provided in one embodiment of the present application;

[0029] Figure 8 A cross-sectional view of a pressure relief valve provided in another embodiment of the present application, cut along a vertical direction;

[0030] Figure 9 for Figure 8 The pressure relief valve shown is a cross-sectional view obtained by cutting it in the horizontal direction;

[0031] Figure 10 A schematic structural diagram of an engine system provided in one embodiment of the present application;

[0032] Figure 11 A schematic structural diagram of an engine system provided in another embodiment of the present application;

[0033] Figure 12 A schematic structural diagram of an engine system provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0034] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0035] The terms used in this application are for the purpose of describing particular embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0036] It should be understood that the words “first”, “second” and similar terms used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as “a” or “an” do not indicate a quantity limitation, but rather indicate the presence of at least one. Unless otherwise indicated, words such as “front”, “rear”, “lower” and / or “upper” are for ease of description only and are not limited to one position or one spatial orientation. Words such as “include” or “comprising” mean that the elements or objects appearing before “include” or “comprising” cover the elements or objects listed after “include” or “comprising” and their equivalents, and do not exclude other elements or objects.

[0037] The pressure relief valve and engine system of the embodiment of the present application are described in detail below with reference to the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can complement or be combined with each other.

[0038] Figure 1 A three-dimensional schematic diagram of a partial structure of a pressure relief valve provided in one embodiment of the present application; Figure 2 A schematic perspective view of a pressure relief valve provided in an embodiment of the present application, cut longitudinally; Figure 3 A partial cross-sectional view of a pressure relief valve provided in an embodiment of the present application, cut along the longitudinal direction; Figure 4 A schematic diagram of a partial structure of a pressure relief valve provided in an embodiment of the present application, cut along the longitudinal direction; Figure 5A cross-sectional view of a pressure relief valve provided in one embodiment of the present application taken along a transverse direction; Figure 6 A schematic diagram of the three-dimensional structure of a sound-absorbing structure provided in one embodiment of the present application; Figure 7 A side view of a sound-absorbing structure provided in one embodiment of the present application; Figure 8 A cross-sectional view of a pressure relief valve provided in another embodiment of the present application, cut along a vertical direction; Figure 9 for Figure 8 The pressure relief valve shown is a cross-sectional view obtained by cutting it in the horizontal direction; Figure 10 A schematic structural diagram of an engine system provided in one embodiment of the present application; Figure 11 A schematic structural diagram of an engine system provided in another embodiment of the present application; Figure 12 A schematic structural diagram of an engine system provided in yet another embodiment of the present application.

[0039] The embodiment of the present application provides a pressure relief valve. Figures 1 to 7 The pressure relief valve 100 includes a main body 10 and a silencer structure 20 .

[0040] The body 10 is provided with a cavity 11, an air inlet 12 communicating with the cavity 11, and an air outlet 13 communicating with the cavity 11. The air inlet 12 is provided at the end of the cavity 11, and the air outlet 13 is provided at the side of the cavity 11. In the illustrated embodiment, the air inlet 12 is provided at the bottom of the cavity 11.

[0041] The sound-absorbing structure 20 is disposed in the cavity 11 , and the sound-absorbing structure 20 includes a flow-disturbing portion 21 ; the flow-disturbing portion 21 disturbs the gas entering the cavity 11 through the air inlet 12 , thereby reducing the acoustic energy of the gas.

[0042] The pressure relief valve 100 provided in the embodiment of the present application is provided with a silencer structure 20 in the cavity 11. The silencer structure 20 includes a flow disturbing portion 21. After the gas enters the cavity 11 through the air inlet 12, the flow disturbing portion 21 of the sound-reducing structure 20 disturbs the gas, thereby dissipating the acoustic energy of the gas and making less noise when the gas flows out through the air outlet 13. The flow disturbing portion 21 can also reduce the flow rate of the gas, which also helps to reduce the acoustic energy of the gas. It can be seen that the pressure relief valve provided in the embodiment of the present application can reduce the noise when the pressure relief valve is deflated.

[0043] In one embodiment, the pressure relief valve 100 further includes an annular baffle 14 and a sealing portion 15 disposed within the cavity 11. The annular baffle 14 is disposed around the air inlet 12 and is connected to the inner wall of the body 10. The sealing portion 15 is movable within the cavity 11 to seal or open the end of the annular baffle 14 facing away from the air inlet 12. The spoiler 21 is disposed outside the annular baffle 14. The spoiler 21 is disposed in the space above the cavity 11, that is, in the space within the cavity 11 facing away from the air inlet 12. When the pressure relief valve 100 does not need to release air, the pressure relief valve 100 is in the closed state, and the blocking portion 15 blocks the end of the annular baffle 14 facing away from the air inlet 12. When the pressure relief valve is in the open state, the blocking portion 15 moves toward the side away from the air outlet 13, and the end of the annular baffle 14 facing away from the air inlet 12 is opened, allowing the gas entering through the air inlet 12 to flow out through the gap between the annular baffle 14 and the blocking portion 15. The flow disruptor 21 disrupts the gas flowing out through the gap between the annular baffle 14 and the blocking portion 15, causing the gas to rotate and reduce the acoustic energy of the gas. The gas then exits the pressure relief valve 100 through the air outlet 13.

[0044] In one embodiment, the flow spoiler 21 includes a plurality of flow spoiler structures 211, which are spaced apart in the axial direction of the cavity 11, extend circumferentially, and include at least one spoiler plate 201. By configuring the flow spoiler 21 to include a plurality of flow spoiler structures 211, and by configuring the plurality of flow-around structures 211 to be spaced apart in the axial direction of the cavity 11, that is, by configuring the plurality of flow-around structures 211 to be spaced apart in the longitudinal direction, the flow spoiler 21 can disrupt the gas multiple times during the downward flow of the gas flowing out through the gap between the annular baffle 14 and the blocking portion 15, thereby improving the flow-disturbing effect on the gas. By configuring the flow spoiler structures 211 to extend circumferentially, the flow spoiler structures 211 can disrupt the gas for a large portion of the gas, further improving the flow-disturbing effect of the flow spoiler 21 on the gas, and helping to reduce the noise during the deflation of the deflation valve. In the illustrated embodiment, the flow spoiler 21 includes four flow spoiler structures 211. In other embodiments, the number of spoiler structures 211 included in the spoiler 21 may be different from four, for example, three, five, or two, etc. The number of spoiler structures 211 may be determined based on the space of the cavity 11 and the distance between adjacent spoiler structures 211. The number of spoilers 201 included in adjacent spoiler structures 211 may be the same or different.

[0045] In one embodiment, the spoiler 201 extends obliquely away from the air inlet 12 from the inner wall side close to the cavity 11 to the inner wall side away from the cavity 11. That is, the spoiler 201 as a whole tends to extend obliquely away from the air inlet 12 from the inner wall side close to the cavity 11 to the inner wall side away from the cavity 11. The spoiler 201 can be substantially straight, or it can be curved, for example, in a wavy shape.

[0046] The gas flowing out through the gap between the annular baffle 14 and the sealing portion 15 moves toward the air inlet 12, that is, moves downward. Since the spoiler 201 extends obliquely in the direction away from the air inlet, the gas flowing out through the gap between the annular baffle 14 and the sealing portion 15 has a greater chance of contacting the spoiler 201 during the downward movement. The spoiler 201 has a better disturbing effect on the gas, which is more helpful to improve the noise reduction effect of the pressure relief valve 100.

[0047] In one embodiment, the silencer structure 20 further includes a stopper 22 disposed in the cavity 11, and the stopper 22 is disposed at the air outlet 13, so that part of the gas flowing toward the air outlet 13 is blocked by the stopper 22. The stopper 22 is disposed on the outer side of the annular baffle 14. When the gas flows out through the gap between the annular baffle 14 and the sealing portion 15 and flows toward the air outlet, the stopper 22 can block most of the gas, causing the gas to diffuse to the surroundings, so that the gas flows toward the spoiler 21 and rotates and turbulently under the action of the spoiler 21, thereby dissipating the sound energy of the gas. That is, the provision of the stopper 22 can cause most of the gas to flow toward the spoiler 21 and turbulently, which can effectively reduce the sound energy of the gas and enhance the noise reduction effect of the pressure relief valve 100. The width of the stopper 22 can be greater than the width of the gas outlet 13, so that the gas flowing out through the gap between the annular baffle 14 and the blocking portion 15 can be mostly blocked by the stopper 22, which helps to improve the noise reduction effect of the pressure relief valve; the lower end of the stopper 22 does not abut the inner wall of the cavity 11, and the gap between the lower end of the stopper 22 and the inner wall of the cavity 11 is connected to the gas outlet 13, so that the gas disturbed by the flow-disturbing portion 21 can flow out of the pressure relief valve 100 through the gap between the stopper 22 and the inner wall of the cavity 11 and the gas outlet 13. The stopper 22 can be an arc-shaped plate, and the gap between the stopper 22 and the annular baffle 14 can be substantially the same at all locations.

[0048] In one embodiment, the muffler structure 20 further includes a plurality of spaced-apart baffles 23, wherein the plurality of spaced-apart baffles 23 are arranged circumferentially. The baffles 23 are disposed on the outside of the annular baffle 14. By providing a plurality of spaced-apart baffles 23, after the gas flows out through the gap between the annular baffle 14 and the blocking portion 15, it is divided into multiple streams of gas by the baffles 23. The multiple streams of gas flow toward the spoiler 21 respectively and are disturbed by the spoiler 21. Compared with a solution in which no baffles 23 are provided, the probability of contact between the gas and the spoiler 21 can be increased, further enhancing the disturbing effect of the spoiler 21 on the gas. The baffle 23 can be located above the annular baffle 14.

[0049] In one embodiment, the spoiler structure 211 includes a plurality of spoilers 201, and the spoilers 201 and the partitions 23 are arranged alternately. Figure 6 and Figure 7 , a partition 23 is provided between two adjacent spoilers 201, a spoiler 201 is provided between two adjacent partitions 23, and the partition 23 is connected to the spoiler 201. In this way, the position of the spoiler structure 211 and the spoiler 201 is relatively compact, which helps to reduce the space occupied by the silencer structure 20, thereby leaving more space in the cavity 11 for gas flow, and helps to improve the spoiler 21's disturbing effect on the gas. The partition 23 can extend along the inner wall of the cavity 11 to the center of the cavity 11, one side of the partition 23 is connected to the spoiler 201, and the other side is located on the inner side of the spoiler 201. In this way, the gas flowing out through the gap between the annular baffle 14 and the blocking portion 15 first passes through the partition 23 and is divided into multiple streams of gas by the partition 23, and then the multiple streams of gas flow to the spoiler 21 to be disturbed.

[0050] In one embodiment, the stopping portion 22 may be located between two adjacent partitions 23 and adjacent to the two partitions 23 .

[0051] In one embodiment, the sound-absorbing structure 20 further includes a mounting portion 24 located at the end of the sound-absorbing structure 20 facing away from the air inlet 12. The mounting portion 24 can be connected to the body 10 to secure the sound-absorbing structure 20 within the cavity 11, preventing the sound-absorbing structure 20 from moving within the cavity 11 and affecting the sound-absorbing effect. The top of the mounting portion 24 can be secured within the cavity 11 using a snap-fit ​​mechanism.

[0052] In some embodiments, a seal 16 is provided between the mounting portion 24 of the sound-absorbing structure 20 and the inner wall of the body 10. The provision of the seal 16 can improve the sealing performance of the cavity 11 and prevent gas leakage. The seal 16 can be a sealing ring.

[0053] The noise reduction structure 20 described in the above embodiment is an integrated structure, that is, the spoiler 21 , the stopper 22 , the partition 23 and the mounting portion 24 may all be an integrated structure, which facilitates the installation of the noise reduction structure 20 .

[0054] In one embodiment, when the silencer structure 20 includes a spoiler 21, a stopper 22 and a partition 23, the gas entering the cavity 11 through the air inlet 12 flows out through the gap between the annular baffle 14 and the sealing portion 15, and then the gas is blocked by the stopper 22 and dispersed to flow into the space between the silencer structure 20 and the sealing portion 15. The partition 23 divides the gas into several streams, and then the several streams of gas all flow to the spoiler 201 of the spoiler 21. The spoiler 201 disturbs the gas, and the gas disturbed by the spoiler 201 moves downward and flows out at the bottom of the cavity through the gap between the stopper 22 and the inner wall of the cavity 11, and then flows to the outside of the pressure relief valve through the air outlet 13; in the process of the gas flowing in the silencer structure 20, the flow velocity of the gas decreases, which also helps to reduce the sound energy of the gas. Figure 3 The direction of the arrow represents the flow direction of the gas.

[0055] In another embodiment of the present application, see Figure 9 and Figure 10 The spoiler 21 includes an annular retaining wall 213 and a plurality of raised structures 214 arranged on the inner wall of the annular retaining wall 213. The annular retaining wall 213 is arranged around the air inlet 12, and the gap between the lower end of the annular retaining wall 213 and the inner wall of the main body 10 is connected to the air outlet 13. The raised structures 214 extend along the extension direction of the annular retaining wall 213, and the plurality of raised structures 214 are arranged at intervals in the circumferential direction. There is a gap between the lower end of the annular retaining wall 213 and the inner wall of the main body 10. The annular retaining wall 213 extends in the longitudinal direction and is located outside the annular baffle 14 and the blocking portion 15. The annular retaining wall 213 can be located in the space above the cavity 11. The gas flowing out through the gap between the annular baffle 14 and the sealing portion 15 enters the space between the annular retaining wall 213 and the sealing portion 15 and rotates, and the protruding structure 214 on the inner wall of the annular retaining wall 213 disturbs the rotating gas, thereby dissipating the energy of the gas and reducing the acoustic energy of the gas.

[0056] In one embodiment, the inner diameter of the lower portion of the annular retaining wall 213 can be larger than the inner diameter of the upper portion. The plurality of protrusions 214 of the annular retaining wall 213 can be evenly spaced. The upper end of the annular retaining wall 213 can be connected to the inner wall of the body 10 by a snap connection.

[0057] The present application also provides an engine system, which can be used in automobiles. Figures 10 to 12The engine system 200 includes an engine 30, a turbocharger 40 and the pressure relief valve 100 described in any of the above embodiments. The turbocharger 40 is provided with a first air intake port 41, a second air intake port 42 and an air outlet port 43.

[0058] The first intake port 41 is in communication with the exhaust manifold of the engine 30, which in turn is in communication with the exhaust port 43. The second intake port 42 is in communication with the atmosphere. The intake port 12 of the pressure relief valve 100 is in communication with the exhaust port 43. The exhaust port 43 can be connected to the intake manifold of the engine 30 via a pipe 70.

[0059] When the engine 30 of the engine system 200 is operating, the exhaust gas discharged by the engine 30 enters the turbocharger 40 through the exhaust manifold and the first intake port 41, driving the turbocharger's turbine blades to rotate. The rotation of the turbine blades drives the blades of the intake fan to rotate, thereby driving external air to enter the turbocharger through the second intake port 42 for supercharging. The supercharged gas enters the intake manifold of the engine 30 through the exhaust port 43 of the turbocharger 40. When the engine 30 stops operating, the turbine of the turbocharger 40 continues to rotate at a high speed due to inertia, and external air continues to enter the turbocharger 40, and the supercharged gas continues to be discharged into the pipeline 70. In order to prevent the pipeline 70 from bursting due to excessive pressure, when the pressure at the air inlet of the pressure relief valve 100 is greater than the set value, the pressure relief valve 100 opens, and the gas can enter the cavity 11 of the pressure relief valve 100 through the air inlet 12 of the pressure relief valve 100, and be discharged through the air outlet 13 of the pressure relief valve 100 to prevent the gas pressure in the pipeline 70 from being too high.

[0060] In some embodiments, the opening and closing of the pressure relief valve 100 is controlled by an electronic control unit. An electromagnetic coil may be provided in the pressure relief valve 100 , and the electronic control unit may control the power on and off of the electromagnetic coil to control the opening and closing of the pressure relief valve 100 .

[0061] In one embodiment, the engine system 200 further includes a throttle valve 80 disposed on the conduit 70 between the outlet port 43 of the turbocharger 40 and the intake manifold of the engine 30. When the engine 30 is operating, the throttle valve 80 is open, and the high-pressure gas discharged from the outlet port 43 of the turbocharger 40 can enter the engine 30 through the throttle valve 80. When the engine 30 is stopped, the throttle valve 80 is closed, and the high-pressure gas discharged from the outlet port of the turbocharger 40 cannot enter the engine 30 through the throttle valve 80.

[0062] The engine system 200 also includes a cooler 50 and an air filter 60. The outlet port 43 of the turbocharger 40 communicates with the intake manifold of the engine 30 via the pipe 70. The cooler 50 is mounted on the pipe 70. The high-pressure, high-temperature exhaust gas from the turbocharger 40 is first cooled by the cooler 50 before entering the engine 30. The second intake port 42 is connected to the atmosphere via the air filter 60.

[0063] In one embodiment, see Figure 10 The air outlet 13 of the pressure relief valve 100 is connected to the second air inlet 42 . The air inlet 12 of the pressure relief valve 100 is connected to the air outlet 43 , and the air inlet 12 of the pressure relief valve 100 is not connected to the pipeline 70 .

[0064] In another embodiment, see Figure 11 The air inlet 12 of the pressure relief valve is connected to the pipe 70, and the air inlet 12 of the pressure relief valve 100 is connected between the cooler 50 and the intake manifold of the engine 30. The air outlet 13 of the pressure relief valve 100 is connected between the air filter 60 and the second air intake port 42. Specifically, the air outlet 13 of the pressure relief valve 100 can be connected to the pipeline between the air filter 60 and the second air intake port 42.

[0065] In yet another embodiment, see Figure 12 The air inlet 12 of the pressure relief valve 100 is connected to the pipeline 70, and the air inlet 12 of the pressure relief valve 100 is connected between the air outlet 43 of the turbocharger 40 and the cooler 50. The air outlet 13 of the pressure relief valve 100 is connected between the air filter 60 and the second air inlet port 42. Specifically, the air outlet 13 of the pressure relief valve 100 can be connected to the pipeline between the air filter 60 and the second air inlet port 42.

[0066] In the embodiments of the present application, directions such as "up", "down", "top" and "bottom" are defined based on the directions shown in the illustrated embodiments. They are defined for convenience of expression and have no effect on the structure of the pressure relief valve. When the orientation of the pressure relief valve changes, these directions change accordingly.

[0067] The above description is merely a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with this profession can make slight changes or modifications to equivalent embodiments with equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

[0068] The disclosure of this patent document contains material that is subject to copyright protection. The copyright is reserved by the copyright owner. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the official records and files of the Patent and Trademark Office.

Claims

1. A pressure relief valve, characterized in that: The pressure relief valve (100) comprises: A body (10), the body being provided with a cavity (11), an air inlet (12) communicating with the cavity, and an air outlet (13) communicating with the cavity, the air inlet (12) being arranged at an end of the cavity (11), and the air outlet (13) being arranged at a side of the cavity (11); A muffler structure (20) is disposed in the cavity, the muffler structure comprising a flow disturber (21); the flow disturber (21) disturbs the gas entering the cavity through the air inlet, thereby reducing the acoustic energy of the gas; The muffler structure (20) further includes a stopper (22) disposed in the cavity, wherein the stopper (22) is an arc-shaped plate; the stopper (22) is disposed at the air outlet (13), and part of the gas flowing toward the air outlet is blocked by the stopper; and a gap between the lower end of the stopper (22) and the inner wall of the cavity is communicated with the air outlet.

2. The pressure relief valve according to claim 1, characterized in that The pressure relief valve (100) further comprises an annular baffle (14) and a blocking portion (15) arranged in the cavity; the annular baffle (14) is arranged around the air inlet; the blocking portion (15) is movable in the cavity to block or open the end of the annular baffle away from the air inlet; the spoiler (21) is arranged outside the annular baffle.

3. The pressure relief valve according to claim 1, characterized in that The muffler structure (20) further comprises a plurality of spaced-apart partitions (23), wherein the plurality of spaced-apart partitions (23) are spaced-apart along the circumferential direction.

4. The pressure relief valve according to claim 1, characterized in that The spoiler portion (21) comprises a plurality of spoiler structures (211), the plurality of spoiler structures (211) being arranged at intervals in the axial direction of the cavity, the spoiler structures (211) extending in the circumferential direction, and the spoiler structures (211) comprising at least one spoiler plate (201).

5. The pressure relief valve according to claim 4, characterized in that: From a side close to the inner wall of the cavity to a side away from the inner wall of the cavity, the spoiler (201) extends obliquely in a direction away from the air inlet.

6. The pressure relief valve according to claim 4, characterized in that The muffler structure (20) further comprises a plurality of spaced partitions (23), wherein the plurality of spaced partitions (23) are spaced circumferentially, and the spoiler structure (211) comprises a plurality of spoilers (201), wherein the spoilers (201) and the spacers (23) are alternately arranged.

7. The pressure relief valve according to claim 1, characterized in that The spoiler (21) comprises an annular retaining wall (213) and a plurality of protruding structures (214) arranged on the inner wall of the annular retaining wall; the annular retaining wall (213) is arranged around the air inlet, and the gap between the lower end of the annular retaining wall and the inner wall of the body is connected to the air outlet; the protruding structures (214) extend along the extension direction of the annular retaining wall (213), and the plurality of protruding structures (214) are arranged at intervals in the circumferential direction.

8. An engine system, characterized in that: The engine system (200) comprises an engine (30), a turbocharger (40), and the pressure relief valve (100) according to any one of claims 1 to 7, wherein the turbocharger (40) is provided with a first air inlet port (41), a second air inlet port (42), and an air outlet port (43); The first air intake port (41) is in communication with the air outlet manifold of the engine (30), the air intake manifold of the engine is in communication with the air outlet port (43), and the second air intake port (42) is in communication with the atmosphere; the air intake port (12) of the pressure relief valve (100) is in communication with the air outlet port (43).

9. The engine system according to claim 8, characterized in that The engine system further includes a cooler (50) and an air filter (60); the turbocharger outlet port (43) is connected to the engine intake manifold via a pipe (70), and the cooler (50) is arranged on the pipe (70); the second intake port (42) is connected to the atmosphere via the air filter (60); the outlet port (13) of the pressure relief valve (100) is connected between the air filter and the second intake port; The air inlet (12) of the pressure relief valve is connected to the air outlet (43), and the air inlet (12) of the pressure relief valve is not connected to the pipe (70), and the air outlet (13) of the pressure relief valve (100) is connected to the second air inlet port; or, the air inlet (12) of the pressure relief valve is connected to the pipe (70), the air inlet (12) is connected between the air outlet (43) of the turbocharger and the cooler (50), and the air outlet (13) of the pressure relief valve (100) is connected between the air filter and the second air inlet port; or, the air inlet (12) of the pressure relief valve is connected to the pipe (70), the air inlet (12) is connected between the cooler (50) and the intake manifold of the engine (30), and the air outlet (13) of the pressure relief valve (100) is connected between the air filter and the second air inlet port.

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