Muffler, turbocharger pressure relief system, and vehicle

Abstract

A muffler (50), comprising a shell (51) and an air inlet pipe (52). A silencing chamber (513) is defined in the shell (51); the shell (51) is provided with an air inlet hole (511) and an air outlet hole (512) in communication with the silencing chamber (513); the air inlet hole (511) and the air outlet hole (512) are spaced apart in a first direction; one end of the air inlet pipe (52) is in communication with the air inlet hole (511), and the other end of the air inlet pipe (52) is inserted into the silencing chamber (513) and spaced apart from the air outlet hole (512), so that an airflow output by a turbocharger (10) is guided into the silencing chamber (513) from the air inlet hole (511) and flows out from the air outlet hole (512). Also disclosed are a turbocharger pressure relief system comprising the muffler, and a vehicle comprising the turbocharger pressure relief system. The present invention is used for eliminating airflow noise, and solves the noise problem of turbochargers.

Description

Silencer, turbocharger pressure relief system and vehicle

[0001] The present application claims priority to the Chinese patent application No. 202410807905.3, filed on June 20, 2024, and entitled "Silencer, turbocharger pressure relief system and vehicle", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of automotive turbocharging technology, and in particular to a silencer, a turbocharger pressure relief system and a vehicle. BACKGROUND

[0003] The turbocharging system of an automotive engine includes a low-pressure intake pipe, a turbocharger, a high-pressure exhaust pipe and an electronic pressure relief valve. The low-pressure intake pipe, the turbocharger and the high-pressure exhaust pipe are sequentially connected, and the turbocharger is used to compress air and deliver it to the engine, which can increase the power of the engine. The electronic pressure relief valve is connected between the high-pressure exhaust pipe and the low-pressure intake pipe, and the high-pressure gas can be released into the low-pressure intake pipe through the electronic pressure relief valve to achieve pressure relief. TECHNICAL PROBLEM

[0004] However, the high-pressure gas will generate strong vortex flow in the pressure relief channel, thereby generating strong air release noise, and the related art cannot easily solve the problem of air flow noise generated when the high-pressure gas is released. TECHNICAL SOLUTION

[0005] The present application provides a silencer, a turbocharger pressure relief system and a vehicle, which can at least solve the problem of noise generated when the high-pressure gas is released in the related art.

[0006] To achieve the purpose of the present application, according to the first aspect of the present application, a silencer is provided, which includes a housing and an intake pipe, the housing defines a silencing cavity therein, the housing is provided with an intake hole and an exhaust hole which are in communication with the silencing cavity, and the intake hole and the exhaust hole are spaced apart along a first direction; one end of the intake pipe is in communication with the intake hole, and the other end of the intake pipe is inserted into the silencing cavity and spaced apart from the exhaust hole, for guiding the airflow output by the turbocharger from the intake hole into the silencing cavity and flowing out from the exhaust hole, so as to eliminate the noise of the airflow.

[0007] In some embodiments of the present application, the intake pipe extends along the first direction.

[0008] In some embodiments of the present application, the silencing cavity is cylindrical.

[0009] In some embodiments of the present application, the intake hole, the exhaust hole, the intake pipe and the silencing cavity are coaxially arranged.

[0010] In some embodiments of the present application, the cross-sectional area of the intake hole, the outlet hole and the muffler cavity, when cut by a plane perpendicular to the first direction, is S1, S2 and S3 in sequence, and S1 < S2 < S3.

[0011] In some embodiments of the present application, the outer diameter of the intake pipe is equal to the hole diameter of the outlet hole.

[0012] In some embodiments of the present application, one end of the shell is provided with a first protruding column in the first direction, and the other end of the shell is provided with a second protruding column, the intake hole penetrates the first protruding column in the first direction, and the outlet hole penetrates the second protruding column in the first direction.

[0013] In some embodiments of the present application, the diameter of the first protruding column is equal to the diameter of the second protruding column.

[0014] In some embodiments of the present application, the material of the muffler is metal, resin or plastic.

[0015] According to the second aspect of the present application, the present application also provides a turbocharger pressure relief system, comprising a turbocharger, a high-pressure pipe, a low-pressure pipe, a pressure relief valve and a muffler, one end of the high-pressure pipe is in communication with the gas outlet of the turbocharger; one end of the low-pressure pipe is in communication with the gas inlet of the turbocharger; the pressure relief valve is connected with the high-pressure pipe; the muffler is the muffler in the above-mentioned embodiments, the intake hole is in communication with the pressure relief valve, and the outlet hole is in communication with the low-pressure pipe, for eliminating the noise of the gas flow from the high-pressure pipe to the low-pressure pipe.

[0016] In some embodiments of the present application, the number of mufflers is multiple, and the multiple mufflers are connected in series between the pressure relief valve and the low-pressure pipe.

[0017] In some embodiments of the present application, the turbocharger pressure relief system further comprises a first branch pipe and a second branch pipe, the first branch pipe is in communication with the pressure relief valve and the intake hole; the second branch pipe is in communication with the outlet hole and the low-pressure pipe.

[0018] In some embodiments of the present application, the turbocharger pressure relief system further comprises a connecting piece, the connecting piece has a first port, a second port and a third port in communication with each other, the first port is in communication with the other end of the high-pressure pipe, the second port is used for connecting an external member, and the third port is provided with the pressure relief valve.

[0019] According to the third aspect of the present application, the present application also provides a vehicle, which comprises the turbocharger pressure relief system in the above-mentioned embodiments. Advantages

[0020] The muffler provided by the embodiment of the application comprises a shell and an air inlet pipe, a muffling cavity is defined in the shell, the shell is provided with an air inlet hole and an air outlet hole which are in communication with the muffling cavity, and the air inlet hole and the air outlet hole are spaced apart along a first direction; one end of the air inlet pipe is in communication with the air inlet hole, and the other end of the air inlet pipe is inserted into the muffling cavity and spaced apart from the air outlet hole, for guiding external airflow from the air inlet hole into the muffling cavity and out of the air outlet hole, so as to eliminate the noise of the airflow; that is, in this embodiment, the muffler combines small-hole muffling and expansion muffling together, and by using the air inlet hole with a small hole diameter and the muffling cavity with a large inner diameter, the airflow resistance speed can be slowed down, the airflow speed and pressure pulsation can be reduced, and the muffling effect can be achieved. Meanwhile, by using the interference principle of sound waves, the sound waves are reflected by the muffling cavity, so that the reflected waves and the incident waves are superposed and eliminated, and the noise problem of the turbocharger is solved.

[0021] Other features and advantages of the application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0023] In order to more completely understand the application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0024] Fig. 1 is a schematic view of a turbocharger pressure relief system according to one embodiment of the application;

[0025] Fig. 2 is an exploded view of a turbocharger pressure relief system according to one embodiment of the application;

[0026] Fig. 3 is a schematic view of a connecting piece in a turbocharger pressure relief system according to one embodiment of the application;

[0027] Fig. 4 is a schematic view of a muffler in a turbocharger pressure relief system according to one embodiment of the application;

[0028] Fig. 5 is a sectional view of a muffler in a turbocharger pressure relief system according to one embodiment of the application.

[0029] Explanation of reference signs: turbocharger pressure relief system 100; supercharger 10; air inlet 11; air outlet 12; high-pressure pipe 20; low-pressure pipe 30; pressure relief valve 40; muffler 50; housing 51; air inlet hole 511; air outlet hole 512; muffling cavity 513; first protrusion 514; second protrusion 515; air inlet pipe 52; first branch pipe 60; second branch pipe 70; connecting piece 80; first port 81; second port 82; third port 83; valve seat 831.

[0030] Embodiments of the present application

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0032] The muffler 50 provided by the embodiments of the present application will be described in detail below with reference to the drawings.

[0033] As shown in FIGS. 1-5, the muffler 50 includes a housing 51 and an air inlet pipe 52.

[0034] In some embodiments of the present application, a muffling cavity 513 is defined in the housing 51, and the housing 51 is provided with an air inlet hole 511 and an air outlet hole 512 which communicate with the muffling cavity 513, and the air inlet hole 511 and the air outlet hole 512 are spaced apart along a first direction; wherein one end of the air inlet pipe 52 communicates with the air inlet hole 511, and the other end of the air inlet pipe 52 is inserted into the muffling cavity 513 and spaced apart from the air outlet hole 512, for guiding the airflow output by the supercharger 10 from the air inlet hole 511 into the muffling cavity 513 and out of the air outlet hole 512, to eliminate the noise of the airflow.

[0035] In some embodiments of the present application, the muffler 50 of the present embodiments is mainly composed of the housing 51 and the air inlet pipe 52. The housing 51 can have a muffling cavity 513 therein, and the housing 51 can be provided with an air inlet hole 511 and an air outlet hole 512 which can respectively communicate with the muffling cavity 513. The housing 51 can have two end portions in the first direction, the air inlet hole 511 can be disposed at one end of the housing 51, and the air outlet hole 512 can be disposed at the other end of the housing 51.

[0036] The air inlet hole 511 can communicate with the output end of the supercharger 10, and the air outlet hole 512 can directly exhaust or communicate with the low-pressure pipe 30. One end of the air inlet hole 511 can form an inlet E on the outer surface of the housing 51, and one end of the air outlet hole 512 can form an outlet F on the surface of the housing 51.

[0037] In addition, the housing 51 can be provided with an air inlet pipe 52, one end of the air inlet pipe 52 can be in communication with the other end of the air inlet hole 511, and the other end of the air inlet pipe 52 can be inserted into the muffling cavity 513 and spaced apart from the other end of the air outlet hole 512. Since the air inlet pipe 52 is inserted into the muffling cavity 513, the outer peripheral surface of the air inlet pipe 52 can be spaced apart from the inner wall surface of the muffling cavity 513.

[0038] As shown in FIG. 5, the air inlet pipe 52 can be a section of pipe extending from the inner wall surface of the muffling cavity 513 into the muffling cavity 513, and the inner diameter of the air inlet pipe 52 can be equal to the diameter of the air inlet hole 511.

[0039] After the pressure relief valve 40 is opened, high-pressure gas flows through the pressure relief valve 40 to the muffler 50, sequentially enters the air inlet hole 511 and the air inlet pipe 52 from the inlet E of the muffler 50, and then flows into the muffling cavity 513 from the end of the air inlet pipe 52 away from the air inlet hole 511, and then flows from the outlet F of the muffler 50 to the low-pressure pipe 30 through the air outlet hole 512.

[0040] The hole diameter of the air inlet hole 511 can be smaller than the hole diameter of the pipe through which the gas flows out of the pressure relief valve 40. Due to the small hole diameter of the air inlet hole 511, the gas flows from a wide diameter to a narrow diameter, and part of the sound waves of a certain frequency are blocked and cannot pass through, are attenuated during propagation, and the flow rate is slowed down. The gas flows into the muffling cavity 513 from the narrow diameter, the gas diffuses into the cavity, and the flow rate is further slowed down. Therefore, when the gas is discharged from the air outlet hole 512, the gas flow rate and pressure pulsation have been greatly attenuated, thereby achieving the effect of muffling.

[0041] In addition, since the exhaust noise is propagated by gas, the propagation path of the sound waves of the noise coincides with the path of the gas flowing from the pressure relief valve 40 to the low-pressure pipe 30. The inner wall surface of the muffling cavity 513 can be a smooth inner wall surface. After the sound waves flow into the muffling cavity 513 from the air inlet pipe 52, the reflected sound waves can be reflected by the inner wall surface of the muffling cavity 513, and the reflected sound waves can interfere with the incident sound waves. Taking a sine wave as an example, by controlling the phases of the incident wave and the reflected wave, the incident sound wave and the reflected sound wave can be superimposed and cancelled out, thereby achieving the purpose of muffling.

[0042] The ratio between the inner diameter of the muffling cavity 513 and the hole diameter of the air inlet hole 511 can be defined as the expansion ratio. The larger the expansion ratio, the greater the transmission loss, and the better the muffling effect. Therefore, the muffling effect can be enhanced by reducing the hole diameter of the air inlet hole 511 and increasing the inner diameter of the muffling cavity 513.

[0043] In addition, the hole diameters of the air inlet hole 511 and the air outlet hole 512 also affect the pressure relief rate. The smaller the hole diameter, the lower the pressure relief rate. In actual use, the appropriate hole diameter of the air inlet hole 511 can be set according to the needs, so as to achieve better muffling effect while meeting the pressure relief rate.

[0044] The size of the sound deadening cavity 513 and the size of the air inlet pipe 52 affect the phase of the refracted sound wave, thereby affecting the interference between the incident wave and the refracted wave. The phase of sound waves of different frequencies is different after being refracted by the sound deadening cavity 513, and thus, by designing the size of the sound deadening cavity 513 and the size of the air inlet pipe 52, the sound deadener 50 can be used to eliminate noise in a specific range. That is, different specifications of the sound deadener 50 can be used to eliminate noise according to the different noise frequencies that need to be eliminated by different vehicle models.

[0045] Therefore, the sound deadener 50 according to the embodiments of the present application combines the orifice sound deadening and the expansion sound deadening together, uses the air inlet hole 511 with a small aperture and the sound deadening cavity 513 with a large inner diameter, slows down the airflow resistance speed, reduces the airflow speed and the pressure pulsation, and achieves the sound deadening effect. At the same time, the sound deadener 50 uses the interference principle of sound waves, uses the sound deadening cavity 513 to reflect the sound waves, and eliminates the reflected wave and the incident wave after superposition, thereby completely solving the noise problem of the supercharger 10.

[0046] In addition, the sound deadener 50 according to the embodiments of the present application can eliminate the wideband airflow noise of 3000 Hz-9000 Hz, and has a good sound deadening effect on high-frequency and wideband airflow noise.

[0047] In some embodiments of the present application, the air inlet pipe 52 extends along the first direction.

[0048] As shown in FIG. 5, the air inlet pipe 52 extends along the first direction, and the channel in the air inlet pipe 52 also extends along the first direction. The left end of the air inlet pipe 52 is in communication with the air inlet hole 511, and the right end of the air inlet pipe 52 is opposite to the air outlet hole 512. That is, the air inlet pipe 52 extends straight from the air inlet hole 511 towards the air outlet hole 512.

[0049] When the gas flows out of the right end of the air inlet pipe 52, it can be sprayed towards each part of the inner wall surface of the sound deadening cavity 513, so that the sound waves are reflected on the inner wall surface of the sound deadening cavity 513 and the outer surface of the air inlet pipe 52, and the interference of the sound waves can achieve the purpose of sound deadening.

[0050] In the embodiments of the present application, the air inlet pipe 52 is arranged to extend along the first direction, so that the sound waves are fully reflected and interfered in the sound deadening cavity 513 before flowing out through the air outlet hole 512, which is conducive to enhancing the sound deadening effect.

[0051] In some embodiments of the present application, the sound deadening cavity 513 is in a cylindrical shape. Arranging the sound deadening cavity 513 as a cylindrical chamber can make the sound deadener 50 have better acoustic effect, effectively reduce noise and vibration. In addition, the cylindrical chamber has good structural stability and simple structure, is easy to manufacture, is conducive to improving production efficiency and reducing production cost.

[0052] It should be noted that, since the refraction of the sound wave is related to the ratio of the length and diameter of the sound absorption cavity 513 and the length of the air inlet pipe 52, the ratio of the length and diameter of the sound absorption cavity 513 and the length of the air inlet pipe 52 will affect the frequency range of the noise that can be eliminated by the muffler 50. By designing the ratio of the length and diameter of the sound absorption cavity 513 and the length of the air inlet pipe 52, the requirements of different sound absorption frequencies can be met.

[0053] In some embodiments of the present application, the axis of the sound absorption cavity 513 extends along the first direction.

[0054] In some embodiments of the present application, the air inlet hole 511, the air outlet hole 512, the air inlet pipe 52 and the sound absorption cavity 513 are coaxially arranged, so that the gas can flow more smoothly through the muffler 50, reducing turbulence and vortex phenomena, thereby reducing the generation of noise, and also improving the efficiency of the gas flow into and out of the muffler 50.

[0055] In addition, the coaxial arrangement is also conducive to improving the structural stability and reliability of the muffler 50, making the structure of the muffler 50 more compact, and also facilitating the processing of the muffler 50 and reducing the processing cost.

[0056] In some embodiments of the present application, the areas of the cross sections obtained by cutting the air inlet hole 511, the air outlet hole 512 and the sound absorption cavity 513 in a plane perpendicular to the first direction are S1, S2 and S3 in turn, and S1 < S2 < S3.

[0057] In some embodiments of the present application, the areas of the cross sections obtained by the air inlet hole 511, the air outlet hole 512 and the sound absorption cavity 513 can be the areas of the projections of the corresponding air outlet hole 512 and sound absorption cavity 513 along the first direction.

[0058] For example, when the sound absorption cavity 513 is a cylindrical chamber, the cross section of the sound absorption cavity 513 is circular, and the cross sections of the air inlet hole 511 and the air outlet hole 512 are circular. As shown in FIG. 5, the diameter of the air inlet hole 511 is equal to the diameter of the air inlet pipe 52, both of which are d1, the diameter of the air outlet hole 512 is d2, and the diameter of the sound absorption cavity 513 is d3, d1 < d2 < d3, which can make S1 < S2 < S3.

[0059] Therefore, when the sound wave enters the air inlet hole 511, it flows from a wide diameter to a narrow diameter, and the flow resistance speed slows down. When the sound wave flows from the air inlet pipe 52 to the sound absorption cavity 513, it flows from a narrow diameter to a wide diameter, and the gas diffuses into the chamber, and the flow rate further slows down. When the sound wave flows from the sound absorption cavity 513 to the air outlet hole 512, it again flows from a wide diameter to a narrow diameter, and the flow resistance speed slows down. When the gas is discharged from the air outlet hole 512, the gas flow rate and pressure pulsation have been greatly attenuated, thereby achieving the sound absorption effect.

[0060] In some embodiments of the present application, the outer diameter of the air inlet pipe 52 is equal to the hole diameter of the air outlet hole 512, facilitating the processing of the air inlet pipe 52, and simplifying the processing of the muffler 50 and reducing the production cost of the muffler 50.

[0061] In some embodiments of the present application, one end of the shell 51 is provided with a first protruding column 514, and the other end of the shell 51 is provided with a second protruding column 515. The air inlet hole 511 penetrates the first protruding column 514 in the first direction, and the air outlet hole 512 penetrates the second protruding column 515 in the first direction.

[0062] In some embodiments of the present application, one end of the shell 51 close to the pressure relief valve 40 is provided with a first protruding column 514, and the other end of the shell 51 away from the pressure relief valve 40 is provided with a second protruding column 515. The first protruding column 514 and the second protruding column 515 can respectively extend in the first direction.

[0063] The first protruding column 514 is provided with an air inlet hole 511, and the second protruding column 515 is provided with an air outlet hole 512. The first protruding column 514 and the second protruding column 515 can be respectively cylindrical protrusions. The first protruding column 514 and the air inlet hole 511 can be coaxially arranged, and the second protruding column 515 and the air outlet hole 512 can be coaxially arranged. One end of the air inlet hole 511 forms an inlet E on the end face of the first protruding column 514 close to the pressure relief valve 40, and the other end of the air inlet hole 511 communicates with one end of the air inlet pipe 52. One end of the air outlet hole 512 forms an opening on the inner wall surface of the muffling cavity 513, and the other end of the air outlet hole 512 forms an outlet F on the end face of the second protruding column 515 away from the pressure relief valve 40.

[0064] In the present embodiment, the first protruding column 514 can be used to connect the pressure relief valve 40, and the second protruding column 515 can be used to connect the low-pressure pipe 30, thereby facilitating the installation of the muffler 50.

[0065] In some embodiments of the present application, the diameter of the first protruding column 514 is equal to the diameter of the second protruding column 515. As shown in FIG. 5, the diameter of the first protruding column 514 can be D1, and the diameter of the second protruding column 515 can be D2, D1=D2, thereby simplifying the processing of the muffler 50, reducing the production cost of the muffler 50, and improving the applicability of the muffler 50.

[0066] In some embodiments of the present application, the muffler 50 is made of metal, resin or plastic. The metal muffler 50 has the advantages of high strength and easy processing, the resin muffler 50 has the advantages of good sound insulation effect and light weight, and the plastic muffler 50 has the advantages of low cost, wear resistance and good sound insulation effect.

[0067] The turbocharger pressure relief system 100 according to the embodiments of the present application comprises a turbocharger 10, a high-pressure pipe 20, a low-pressure pipe 30, a pressure relief valve 40 and a muffler 50. The muffler 50 can be the muffler 50 in any of the above embodiments.

[0068] In some embodiments of the present application, one end of the high-pressure pipe 20 is in communication with the gas outlet 12 of the turbocharger 10. One end of the low-pressure pipe 30 is in communication with the gas inlet 11 of the turbocharger 10. The pressure relief valve 40 is connected to the high-pressure pipe 20. The gas inlet hole 511 of the muffler 50 is in communication with the pressure relief valve 40, and the gas outlet hole 512 of the muffler 50 is in communication with the low-pressure pipe 30, for eliminating the noise of the gas flow from the high-pressure pipe 20 to the low-pressure pipe 30.

[0069] In other words, the turbocharger pressure relief system 100 according to the embodiments of the present application mainly comprises a turbocharger 10, a high-pressure pipe 20, a low-pressure pipe 30, a pressure relief valve 40 and a muffler 50. The turbocharger 10 can include but is not limited to a turbocharger 10.

[0070] The gas inlet 11 of the turbocharger 10 can be in communication with the low-pressure pipe 30, and the gas outlet 12 of the turbocharger 10 can be in communication with the high-pressure pipe 20. The gas pressure in the low-pressure pipe 30 is lower than that in the high-pressure pipe 20. The low-pressure gas can enter the turbocharger 10 through the low-pressure pipe 30, and then the low-pressure gas is compressed in the turbocharger 10 to form high-pressure gas, which is then delivered to the engine through the high-pressure pipe 20 to improve the combustion efficiency of the engine and play a role in energy saving and emission reduction.

[0071] In addition, the high-pressure pipe 20 can be provided with a pressure relief valve 40, and the pressure relief valve 40 and the low-pressure pipe 30 can be in communication through the muffler 50. When the pressure relief valve 40 is closed, the turbocharger 10 can continuously supercharge the intake air. When the pressure relief valve 40 is opened, the high-pressure gas in the high-pressure pipe 20 can flow back to the low-pressure pipe 30 by passing through the pressure relief valve 40 and the muffler 50 in sequence to achieve the purpose of pressure relief.

[0072] In the related art, after the pressure relief valve 40 is opened, the high-pressure gas is rapidly injected around the valve port of the pressure relief valve 40, and the gas produces strong vortex flow in the pipeline, thereby producing strong air release sound. The present application provides a muffler 50 between the pressure relief valve 40 and the low-pressure pipe 30, so that the muffler 50 can reduce the gas flow rate and pressure pulsation on the noise path, so that the pressure relief gas flows into the low-pressure pipe 30 after noise reduction, achieving the effect of noise reduction.

[0073] Therefore, according to the turbocharger pressure relief system 100 of the embodiments of the present application, the pressure relief valve 40 and the muffler 50 are arranged between the high-pressure pipe 20 and the low-pressure pipe 30, so that the high-pressure gas released from the pressure relief valve 40 first passes through the muffler 50 to be silenced and then flows into the low-pressure pipe 30. The muffler 50 silences the noise in the noise path, which can effectively solve the noise problem generated when the turbocharger 10 is relieved.

[0074] In addition, the muffler 50 is arranged between the pressure relief valve 40 and the low-pressure pipe 30, which has a simple structure and strong adaptability. The existing turbocharger 10 system can be upgraded by adding the structure, which is conducive to reducing the cost.

[0075] In some embodiments of the present application, the pressure relief valve 40 can be an electronic pressure relief valve 40, which can be electrically connected with the control system of the vehicle.

[0076] In some embodiments of the present application, the number of the mufflers 50 is multiple, and the multiple mufflers 50 are connected in series between the pressure relief valve 40 and the low-pressure pipe 30.

[0077] The multiple mufflers 50 are arranged in series, and each muffler 50 can attenuate the noise, which is conducive to enhancing the silencing effect, widening the silencing frequency band, effectively attenuating the noise in a wider frequency range, and improving the stability of the system.

[0078] It should be noted that, for the turbocharger pressure relief system 100, when the structures of the turbocharger 10, the low-pressure pipe 30 and the high-pressure pipe 20 are fixed, the frequency band of the noise generated when the pressure is relieved is also relatively fixed. For the frequency band of the noise, the diameter of the air inlet hole 511, the length of the air inlet pipe 52, the diameter of the sound attenuation cavity 513, the length of the sound attenuation cavity 513 and the diameter of the air outlet hole 512 can be designed to meet the above requirements, so that the noise problem of the turbocharger can be solved by a single muffler 50, and the arrangement of the single muffler 50 is conducive to reducing the production cost.

[0079] In some embodiments of the present application, the turbocharger pressure relief system 100 further comprises a first branch pipe 60 and a second branch pipe 70. The first branch pipe 60 communicates the pressure relief valve 40 and the air inlet hole 511, and one end of the first branch pipe 60 is sleeved on the first protruding column 514. The second branch pipe 70 communicates the air outlet hole 512 and the low-pressure pipe 30, and one end of the second branch pipe 70 is sleeved on the second protruding column 515.

[0080] That is, the pressure relief valve 40 and the first protrusion 514 of the muffler 50 can be connected through the first branch pipe 60, and the second protrusion 515 of the muffler 50 and the low-pressure pipe 30 can be connected through the second branch pipe 70. The first branch pipe 60 is sleeved with the first protrusion 514, and the second branch pipe 70 is sleeved with the second protrusion 515. The first branch pipe 60 and the muffler 50 and the second branch pipe 70 and the muffler 50 can be fixed through the clamps respectively.

[0081] In some embodiments of the present application, the structures of the first branch pipe 60 and the second branch pipe 70 can be the same.

[0082] In some embodiments of the present application, at least one of the first branch pipe 60 and the second branch pipe 70 is a pipe flexible joint, which can facilitate the connection and installation between the muffler 50 and the pressure relief valve 40 and the low-pressure pipe 30.

[0083] In some embodiments of the present application, the turbocharger pressure relief system 100 further comprises a connecting piece 80, which has a first port 81, a second port 82 and a third port 83 in communication with each other. The first port 81 is in communication with the other end of the high-pressure pipe 20, the second port 82 is used to connect external components, and the third port 83 is provided with the pressure relief valve 40.

[0084] As shown in FIG. 3, the connecting piece 80 can have three ports, namely the first port 81, the second port 82 and the third port 83. The first port 81 can be the inlet A, the second port 82 can be the outlet B, and the third port 83 can be the outlet C. The inlet A can be in communication with the output end of the high-pressure pipe 20, the outlet B can be in communication with the engine, and the outlet C can be provided with the pressure relief valve 40. When the pressure relief valve 40 is opened, the outlet C can be in communication with the low-pressure pipe 30. In addition, a valve seat 831 can be provided at the outlet C, and the pressure relief valve 40 can be arranged in the valve seat 831.

[0085] The gas flow path in the present application is shown in FIG. 1. The gas enters the turbocharger 10 through the low-pressure pipe 30, enters the high-pressure pipe 20 after being pressurized, and then enters the connecting piece 80. When the pressure relief valve 40 is closed, the high-pressure gas only flows to the engine through the outlet B. When the pressure relief valve 40 is opened, the high-pressure gas flows into the muffler 50 through the outlet C, and then returns to the low-pressure pipe 30 after being silenced by the muffler 50, so that the pressure in the high-pressure pipe 20 is reduced, and the pressure relief is realized.

[0086] In some embodiments of the present application, the material of the connecting piece 80 can be plastic.

[0087] In some embodiments of the present application, the connecting piece 80 can be a tee.

[0088] The vehicle according to the embodiments of the present application also has the corresponding technical effects due to the turbocharger pressure relief system 100 according to the embodiments of the present application, that is, the turbocharger pressure relief system 100 is arranged between the high-pressure pipe 20 and the low-pressure pipe 30, the high-pressure gas is released from the pressure relief valve 40, then passes through the muffler 50 to reduce noise, and then flows into the low-pressure pipe 30, the noise is reduced in the noise path by the muffler 50, and the noise problem caused by the pressure relief of the turbocharger 10 can be effectively solved.

[0089] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0090] In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0091] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0092] The above is only the preferred embodiments of the present application, and does not limit the present application in any form, but any simple modification, equivalent change and modification made according to the technical essence of the present application without departing from the technical solution content of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A silencer (50), wherein, include: A housing (51) having a sound-absorbing cavity (513) defined within it, the housing (51) having an air inlet (511) and an air outlet (512) communicating with the sound-absorbing cavity (513), the air inlet (511) and the air outlet (512) being spaced apart along a first direction; and An intake pipe (52) is provided, one end of which is connected to the intake port (511), and the other end of which is inserted into the silencing cavity (513) and spaced apart from the exhaust port (512). The intake pipe (52) is used to guide the airflow output by the turbocharger (10) from the intake port (511) into the silencing cavity (513) and out from the exhaust port (512) to eliminate the noise of the airflow.

2. The silencer (50) according to claim 1, wherein, The air intake pipe (52) extends along the first direction.

3. The silencer (50) according to claim 1 or 2, wherein, The silencing cavity (513) is cylindrical.

4. The silencer (50) according to claim 3, wherein, The air inlet (511), the air outlet (512), the air inlet pipe (52), and the silencer (513) are coaxially arranged.

5. The silencer (50) according to any one of claims 1 to 4, wherein, The areas of the cross sections obtained by cutting the air inlet (511), the air outlet (512), and the silencing cavity (513) with a plane perpendicular to the first direction are S1, S2, and S3, respectively, where S1 < S2 < S3.

6. The silencer (50) according to any one of claims 1 to 5, wherein, The outer diameter of the air inlet pipe (52) is equal to the diameter of the air outlet (512).

7. The silencer (50) according to any one of claims 1 to 6, wherein, In the first direction, one end of the housing (51) is provided with a first protrusion (514), and the other end of the housing (51) is provided with a second protrusion (515). The air inlet (511) passes through the first protrusion (514) in the first direction, and the air outlet (512) passes through the second protrusion (515) in the first direction.

8. The silencer (50) according to claim 7, wherein, The diameter of the first protrusion (514) is equal to the diameter of the second protrusion (515).

9. The silencer (50) according to any one of claims 1 to 8, wherein, The muffler (50) is made of metal, resin or plastic.

10. A turbocharger depressurization system (100), wherein, include: Supercharger (10); High-pressure pipe (20), one end of which is connected to the outlet (12) of the booster (10); Low-pressure pipe (30), one end of which is connected to the air inlet (11) of the booster (10); A pressure relief valve (40) is connected to the high-pressure pipe (20); and A silencer (50), wherein the silencer (50) is the silencer (50) according to any one of claims 1-9, wherein the air inlet (511) is connected to the pressure relief valve (40) and the air outlet (512) is connected to the low-pressure pipe (30), for eliminating noise from the airflow flowing from the high-pressure pipe (20) to the low-pressure pipe (30).

11. The turbocharger depressurization system (100) according to claim 10, wherein, The number of silencers (50) is multiple, and the multiple silencers (50) are connected in series between the pressure relief valve (40) and the low-pressure pipe (30).

12. The turbocharger depressurization system (100) according to claim 10 or 11, wherein, Also includes: A first branch pipe (60) is connected to the pressure relief valve (40) and the air inlet (511); and The second branch pipe (70) connects the air outlet (512) and the low-pressure pipe (30).

13. The turbocharger depressurization system (100) according to any one of claims 10 to 12, wherein, Also includes: The connector (80) has a first port (81), a second port (82) and a third port (83) that are interconnected. The first port (81) is connected to the other end of the high-pressure pipe (20), the second port (82) is used to connect external components, and the third port (83) is provided with the pressure relief valve (40).

14. A vehicle, wherein, include: The turbocharger depressurization system (100) as described in any one of claims 10-13.

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