Automobile and exhaust silencer

Abstract

The utility model discloses an exhaust silencer and an automobile. The exhaust silencer comprises a silencing cavity, a first fixed baffle, a second fixed baffle, an adjustable baffle and an air pipe assembly. Wherein an accommodating cavity is formed in the silencing cavity; the first fixed baffle and the second fixed baffle are arranged in the containing cavity side by side in a spaced mode, and the containing cavity is divided into a first cavity, a second cavity and a third cavity through the first fixed baffle and the second fixed baffle. The adjustable baffle is rotatably arranged in the third chamber; the air pipe assembly is connected with the silencing cavity, the air pipe assembly is used for guiding airflow into the containing cavity so that the airflow can pass through the first cavity, the second cavity and the third cavity to be subjected to silencing, and the air pipe assembly is further used for discharging the airflow subjected to silencing. The exhaust silencer is small in size, low in cost and good in noise reduction effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile performance optimization, in particular to an automobile and an exhaust muffler. BACKGROUND

[0002] The exhaust muffler is one of the main components of the automobile exhaust system, which can reduce the exhaust noise of the engine, and enable the high-temperature exhaust gas to be safely and effectively discharged, so that the vehicle noise meets the regulatory requirements and prevents noise pollution.

[0003] The muffler is divided into a resistive muffler, a reactive muffler and a resistive-reactive composite muffler according to the muffling principle. The resistive muffler is a muffler filled with sound-absorbing materials around the internal exhaust passing pipe to absorb sound energy for the purpose of muffling. The resistive muffler has good effect on muffled sound of medium and high frequencies, and is less used alone as an automobile exhaust muffler, and is usually used in combination with the reactive muffler. The reactive muffler is a muffler in which various muffling units such as expansion chambers and resonance chambers are formed by internal passing pipes and baffles. When the sound waves pass through these muffling units, the sound waves are reflected and interfered in the propagation, thereby reducing the sound energy to achieve the purpose of muffling. The reactive muffler has limited frequency band for muffling, and usually has good effect on muffling of low and medium frequencies, but poor effect on muffling of high frequencies. The reactive muffler is usually used for trucks. The resistive muffler has good effect on muffling of medium and high frequencies, while the reactive muffler is suitable for eliminating low and medium frequency noise. The resistive and reactive mufflers are used in combination to obtain a wide frequency band of noise reduction effect.

[0004] The muffler in the prior art mainly relies on multiple layers of sound-absorbing materials and complex airflow channel design. These mufflers increase the volume and sound-absorbing materials to improve the noise reduction effect. However, this way results in a large volume of the muffler and high cost. CONTENT OF THE UTILITY MODEL

[0005] In view of the problems in the background art, the purpose of the present application is to provide an automobile and an exhaust muffler to solve the technical problems of large volume and high cost of the muffler in the prior art.

[0006] In order to solve the above technical problems, the first technical solution adopted by the present application is to provide an exhaust muffler, which comprises: a muffling cavity, first and second fixed baffles, an adjustable baffle and an air pipe assembly. The muffling cavity forms a receiving cavity. The first and second fixed baffles are arranged side by side and spaced apart in the receiving cavity, and the first and second fixed baffles divide the receiving cavity into a first chamber, a second chamber and a third chamber. The adjustable baffle is rotatably arranged in the third chamber. The air pipe assembly is connected with the muffling cavity, and is used to introduce airflow into the receiving cavity so that the airflow passes through the first, second and third chambers for muffling, and is also used to discharge the muffled airflow.

[0007] Further, the adjustable baffle has an open state and a closed state, in the closed state, the adjustable baffle is arranged in parallel with the second fixed baffle to divide the third chamber into a fourth chamber and a fifth chamber. In the open state, the adjustable baffle has an included angle with the second fixed baffle, the included angle is greater than 0 and less than or equal to 90 degrees.

[0008] Further, the exhaust muffler further comprises a rotating shaft and a driving mechanism, the adjustable baffle is connected to the rotating shaft, the rotating shaft is connected to the driving mechanism, and the driving mechanism is used to drive the rotating shaft to rotate to drive the adjustable baffle to rotate.

[0009] Further, the driving mechanism is arranged outside the muffling cavity.

[0010] Further, the adjustable baffle is provided with a plurality of muffling holes.

[0011] Further, the first fixed baffle is provided with a plurality of first muffling holes, and the second fixed baffle is provided with a plurality of second muffling holes.

[0012] Further, the air pipe assembly comprises: an air inlet pipe, a connecting pipe and an air outlet pipe, the air inlet pipe is communicated with the second chamber to introduce air flow from outside into the second chamber, one end of the connecting pipe is communicated with the first chamber, the other end of the connecting pipe is communicated with the third chamber, one end of the air outlet pipe is communicated with the third chamber, and the other end of the air outlet pipe is communicated with the outside to discharge the muffled air flow.

[0013] Further, the air inlet pipe is arranged in an L shape, one end of the air inlet pipe is located outside the accommodating cavity, and the other end of the air inlet pipe penetrates the second fixed baffle through the third chamber.

[0014] Further, the muffling cavity comprises a cylinder body and first and second end covers located at both ends of the cylinder body, the cylinder body forms the accommodating cavity, the first and second end covers are respectively located at the openings of the cylinder body, the first end cover is arranged close to the adjustable baffle, the second end cover is arranged close to the first chamber, and the air outlet pipe penetrates the second fixed baffle, the first fixed baffle and the second end cover in sequence.

[0015] In order to solve the above technical problems, the first technical scheme adopted by the present application is to provide an automobile, which comprises the exhaust muffler of any one of the above embodiments.

[0016] Beneficial effects: Different from the prior art, the exhaust silencer provided by the application comprises a silencing cavity, first and second fixed baffles, an adjustable baffle and an air pipe assembly. The silencing cavity forms an accommodating cavity. The first and second fixed baffles are arranged side by side and spaced apart in the accommodating cavity, and the first and second fixed baffles divide the accommodating cavity into a first chamber, a second chamber and a third chamber. The adjustable baffle is rotatably arranged in the third chamber. The air pipe assembly is connected with the silencing cavity, and is used for introducing airflow into the accommodating cavity so that the airflow passes through the first, second and third chambers for silencing, and is also used for discharging the airflow after silencing. The exhaust silencer has a small volume, a low cost and a good noise reduction effect, and the applicability of the exhaust silencer can be improved by arranging the adjustable baffle. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of 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 some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0018] Figure 1 is a structural schematic view of an embodiment of an exhaust silencer provided by the application;

[0019] Figure 2 is Figure 1 is a structural schematic view of another state of the exhaust silencer shown in the figure;

[0020] Figure 3 is a frame schematic view of a vehicle provided by the application.

[0021] BRIEF DESCRIPTION OF DRAWINGS: 10, exhaust silencer; 11, silencing cavity; 12, first fixed baffle; 13, second fixed baffle; 111, cylinder body; 112, first end cover; 113, second end cover; 101, first chamber; 102, second chamber; 103, third chamber; 104, fourth chamber; 105, fifth chamber; 14, air pipe assembly; 141, air inlet pipe; 142, connecting pipe; 143, air outlet pipe; 17, adjustable baffle; 18, rotating shaft; 16, driving mechanism. DETAILED DESCRIPTION

[0022] The application will be described in further detail below in conjunction with the drawings and embodiments. It is particularly pointed out that the following embodiments are only used to illustrate the application, but do not limit the scope of the application. Similarly, the following embodiments are only some embodiments of the application rather than all embodiments of the application, and all other embodiments obtained by those skilled in the art without any creative effort are within the scope of protection of the application.

[0023] Reference herein to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a common embodiment, or an embodiment that is independent of other embodiments. It is explicitly contemplated that embodiments described herein can be combined with other embodiments in any way deemed appropriate by those skilled in the art.

[0024] In the description of the application, it is necessary to note that unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be connected through an intermediate medium. For those skilled in the art, the above-mentioned specific meanings in the application can be connected according to the specific circumstances.

[0025] In the description of the application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the description and the features of different embodiments or examples without contradiction.

[0026] In addition, the terms "first", "second" are only for descriptive purposes 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 at least one of the features. In the description of the application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0027] Please refer to Figure 1 The figure shows Figure 1 is a structural schematic diagram of an embodiment of an exhaust muffler provided by the application. Specifically, the exhaust muffler 10 includes a muffling cavity 11, a first fixed baffle 12, a second fixed baffle 13, an adjustable baffle 17 and a gas pipe assembly 14.

[0028] The muffler cavity 11 is formed with a receiving cavity (not shown in the figure) for reducing the noise of the airflow. The muffler cavity 11 is cylindrical in shape. The cylindrical muffler cavity 11 is smaller in volume and can reduce the frictional resistance of the airflow when passing through, which is beneficial to the flow of air. In other embodiments, the shape of the muffler cavity 11 can also be a rectangular parallelepiped, etc.

[0029] like Figure 1 As shown, the muffler cavity 11 includes a cylinder 111 and a first end cap 112 and a second end cap 113 provided at both ends of the cylinder 111. The cylinder 111 forms the above-mentioned accommodating cavity, and both ends of the cylinder 111 are open. The first end cap 112 and the second end cap 113 are used to block the openings at both ends of the cylinder 111 respectively.

[0030] The first fixed baffle 12, the second fixed baffle 13 and the adjustable baffle 17 are all arranged in the accommodating cavity at intervals to separate the accommodating cavity. The second end cover 113 is arranged close to the first fixed baffle 12, and the first end cover 113 is arranged close to the adjustable baffle 17. Figure 1 and Figure 2 As shown, Figure 2 yes Figure 1 The schematic structural diagram of the exhaust muffler in another state is shown, in which the first fixed baffle 12, the second fixed baffle 13 and the adjustable baffle 17 divide the accommodating chamber into a first chamber 101, a second chamber 102 and a third chamber 103 arranged in sequence from right to left.

[0031] The adjustable baffle 17 is rotatably disposed in the third chamber 103. The adjustable baffle 17 can separate the third chamber 103 into a fourth chamber 104 and a fifth chamber 105. The adjustable baffle 17 can adjust its angle in the third chamber 103 to adjust the number of chambers in the muffler chamber 11.

[0032] The adjustable baffle 17 can be in a closed state or an open state. When the adjustable baffle 17 is in the closed state, the adjustable baffle 17, the first fixed baffle 12, and the second fixed baffle 13 are arranged in parallel. The fourth chamber 104 and the fifth chamber 105 are separated by the adjustable baffle 17. When the adjustable baffle 17 is in the open state, the fourth chamber 104 and the fifth chamber 105 are connected. The adjustable baffle 17 can be fully or partially open. When the adjustable baffle 17 is fully open, the angle between the adjustable baffle 17 and the second fixed baffle 13 is 90 degrees, so that the outer surface of the adjustable baffle 17 is aligned with the direction of the airflow. When the adjustable baffle 17 is partially open, the angle between the adjustable baffle 17 and the second fixed baffle 13 is greater than 0 degrees and less than 90 degrees. For example, when the adjustable baffle 17 is partially open, the angle between the adjustable baffle 17 and the second fixed baffle 13 is 30 degrees, 40 degrees, or 90 degrees.

[0033] likeFigure 1 and Figure 2 As shown, the air pipe assembly 14 is connected to the silencer cavity 11. The air pipe assembly 14 is used to introduce the airflow into the accommodating cavity so that the airflow is silenced in the first cavity 101, the second cavity 102 and the third cavity 103. The air pipe assembly 14 is also used to discharge the airflow after noise reduction.

[0034] In the present application, when the exhaust muffler 10 is applied to a car, the adjustable baffle 17 can be adjusted at different angles according to the driving conditions of the car. For example, when the car is driving at a low speed, the adjustable baffle 17 can be closed to separate the third chamber 103, thereby increasing the volume of the muffler chamber and the exhaust back pressure to eliminate this low-frequency noise. In this process, the exhaust noise of the car engine passes through four muffler chambers in the muffler chamber 11, and the sound is reflected and interfered, ultimately achieving the purpose of noise reduction. When the car is driving at medium and high speeds, the engine is in a high-speed operating condition. Under this operating condition, the engine exhaust noise is mostly medium and high frequency. In this case, the adjustable baffle 17 can be in an open state to reduce the number of chambers. The sound can pass through three muffler chambers. The reduction in chambers can reduce the airflow velocity, thereby reducing the airflow noise and reducing the exhaust back pressure. In this way, noise reduction and engine power improvement can be achieved.

[0035] Furthermore, if Figure 2 As shown, the adjustable baffle 17 is provided with a plurality of muffler holes (not shown), through which the airflow from the fourth chamber 104 can enter the fifth chamber 105. In other embodiments, the adjustable baffle 17 may not be provided with muffler holes, and the airflow from the fourth chamber 104 can enter the fifth chamber 105 through a gas conduit. Similarly, the first fixed baffle 12 can be provided with a plurality of first muffler holes (not shown), and the second fixed baffle 13 can be provided with a plurality of second muffler holes (not shown).

[0036] like Figure 1 and Figure 2 As shown, the air pipe assembly 14 includes: an air intake pipe 141, a connecting pipe 142 and an exhaust pipe 143. The air intake pipe 141 is connected to the second chamber 102 to introduce the airflow into the second chamber 102. One end of the connecting pipe 142 is connected to the first chamber 101, and the other end of the connecting pipe 142 is connected to the third chamber 103. One end of the exhaust pipe 143 is connected to the third chamber 103, and the other end of the exhaust pipe 143 is connected to the outside to discharge the airflow after noise reduction.

[0037] Specifically, the air intake pipe 141 is roughly L-shaped, with one end of the air intake pipe 141 located outside the cylinder 111, and the other end of the air intake pipe 141 passing through the side wall of the cylinder 111 and through the second fixed baffle 13 via the third chamber 103 to communicate with the second chamber 102. The air intake pipe 141 can introduce airflow into the second chamber 102. One end of the connecting pipe 142 is connected to the first chamber 101, and the other end of the connecting pipe 142 is connected to the third chamber 103. One end of the connecting pipe 142 passes through the first fixed baffle 12, and the other end of the connecting pipe 142 passes through the second fixed baffle 13. The function of the connecting pipe 142 is to connect the first chamber 101 and the third chamber 103. In this way, the airflow in the first chamber 101 can flow to the third chamber 103 through the connecting pipe 142. The exhaust pipe 143 may also be L-shaped, with one end of the exhaust pipe 143 communicating with the third chamber 103 and the other end of the exhaust pipe 143 being located outside. The exhaust pipe 143 passes through the first fixed baffle 12 and the second fixed baffle 13 and the second end cover 113 to extend to the outside of the accommodating cavity.

[0038] The silencing process of the exhaust muffler 10 will be described in detail below.

[0039] When the car is running at low speed, the engine is in the idle and low speed working condition. The adjustable baffle 17 can be in the closed state, such as Figure 1 As shown, the adjustable baffle 17 now separates the third chamber 103 into a fourth chamber 104 and a fifth chamber 105. In this state, the exhaust muffler 10 includes a total of four chambers, namely: a first chamber 101, a second chamber 102, a fourth chamber 104 and a fifth chamber 105. The combustion exhaust gas of the engine passes through the catalyst assembly and the front muffler assembly, first reaching the intake flange (not shown in the figure) at the end of the intake pipe 141, and then passes through the intake pipe 141 to introduce the exhaust gas into the second chamber 102, and then introduces the airflow into the first chamber 101 through the first muffler hole on the first fixed baffle 12. The airflow in the first chamber 101 flows into the fourth chamber 104 through the connecting pipe 142. The airflow in the fourth chamber 104 is divided into two paths. One path of airflow passes through the muffler hole on the adjustable baffle 17 to the fifth chamber 105, and the other path of airflow in the fourth chamber 104 is directly discharged through the exhaust pipe 143. Among them, the airflow reaching the fifth chamber 105 will eventually be discharged through the exhaust pipe 143 under the action of the airflow pressure. The above two paths of airflow passing through the exhaust pipe 143 are finally discharged outside the vehicle through the exhaust pipe 143. In this operating condition, the frequency of the engine exhaust noise is relatively low, and it is necessary to increase the volume and exhaust back pressure of the exhaust muffler 10 to eliminate this low-frequency noise. During this process, the engine exhaust noise passes through four silencer chambers in the muffler, and the sound is reflected and interfered, ultimately achieving the purpose of noise reduction.

[0040] When the car is running at a medium or high speed, the engine is in a high speed working condition. In this working condition, the adjustable baffle 17 is opened (the adjustable baffle 17 can be fully opened or partially opened), as shown in FIG. Figure 2 As shown, the fourth chamber 104 and the fifth chamber 105 are now connected. In this state, the exhaust muffler 10 is divided into three chambers. The engine's combustion exhaust passes through the catalyst assembly and the front muffler assembly, first reaching the intake flange at the end of the intake pipe 141. The exhaust gas is then introduced into the second chamber 102 through the intake pipe 141. The exhaust gas is then introduced into the first chamber 101 through the first muffler hole on the first fixed baffle 12. The airflow in the first chamber 101 flows into the third chamber 103 through the connecting pipe 142. The third chamber 103 is the combined chamber of the fourth chamber 104 and the fifth chamber 105 after the adjustable baffle 17 is opened. The airflow then passes through the exhaust pipe 143 and is finally discharged from the vehicle. The frequency of the engine exhaust noise in this operating condition is medium to high frequency, and it is necessary to reduce the airflow path and lower the exhaust back pressure to eliminate this medium and high frequency noise. In this process, the engine exhaust noise passes through three silencer chambers in the muffler. The sound is reflected and interfered. The reduction of the chamber can reduce the airflow velocity, reduce the airflow noise, and reduce the exhaust back pressure at the same time, ultimately achieving the purpose of noise reduction and improving engine power.

[0041] In the above embodiment, multiple adjustable airflow channels are designed, and different airflow paths are achieved by opening and closing the adjustable baffle 17. In this way, the exhaust muffler 10 can adapt to different working conditions and improve the applicability of the muffler.

[0042] Furthermore, if Figure 2 As shown, the exhaust muffler 10 may further include a rotating shaft 18 and a driving mechanism 16, wherein an adjustable baffle 17 is connected to the rotating shaft 18, and the rotating shaft 18 is connected to the driving mechanism 16. The driving mechanism 16 is used to drive the rotating shaft 18 to rotate, thereby driving the adjustable baffle 17 to rotate. Furthermore, during use, the electronic control unit of the vehicle can be connected to the driving mechanism 16 to drive the adjustable baffle 17 to rotate via the driving mechanism 16, so that the exhaust muffler 10 can adapt to different working conditions.

[0043] Furthermore, the driving mechanism 16 can be arranged outside the cylinder 111 to reduce the occupation of the muffler chamber by the driving mechanism 16 and avoid the driving mechanism 16 affecting the flow of airflow, thereby improving the noise reduction effect of the exhaust muffler 10.

[0044] The driving mechanism 16 may be a power component such as a motor or a cylinder, etc. The specific structure of the driving mechanism 16 is within the scope of those skilled in the art and will not be elaborated herein.

[0045] In conclusion, the exhaust muffler 10 has good noise reduction effect, the adjustable baffle 17 can reduce the dependence on the volume of the exhaust muffler 10, thereby reducing the volume of the exhaust muffler 10, and the demand for multi-layer sound-absorbing material is reduced, and the manufacturing cost is reduced. The state of the adjustable baffle 17 can be adjusted according to the actual operating condition, and the applicability of the exhaust muffler 10 is improved.

[0046] The application also provides a car, please refer to Figure 3 , Figure 3 is a schematic view of a frame of a car provided by the application. Specifically, the car 30 comprises an engine 32 and an exhaust muffler 10, the engine 32 is connected to the exhaust muffler 10, the engine 32 discharges exhaust gas during operation, and the exhaust muffler 10 is used for muffling the exhaust gas.

[0047] The specific structure of the exhaust muffler 10 can refer to the introduction of any of the above embodiments, which will not be repeated here.

[0048] The exhaust muffler 10 in the car 30 of the application has small volume, low cost, and good noise reduction effect, and the state of the adjustable baffle in the exhaust muffler 10 can be adjusted according to the actual operating condition, thereby improving the applicability of the exhaust muffler 10.

[0049] The above-mentioned embodiments do not constitute a limitation on the protection scope of the technical solutions. Any modifications, equivalent replacements and improvements made within the spirit and principles of the above-mentioned embodiments are included in the protection scope of the technical solutions.

Claims

1. An exhaust silencer, characterized by, The exhaust muffler comprises: a muffling cavity formed with a receiving cavity; first and second fixed baffles arranged side by side in the receiving cavity, which divide the receiving cavity into first, second and third chambers; an adjustable baffle rotatably arranged in the third chamber; a gas pipe assembly connected with the muffling cavity, which is used to introduce gas flow into the receiving cavity so that the gas flow is damped through the first, second and third chambers, and is also used to discharge the damped gas flow.

2. The exhaust silencer according to claim 1, characterized in that The adjustable baffle has an open state and a closed state, in the closed state, the adjustable baffle is arranged in parallel with the second fixed baffle to divide the third chamber into fourth and fifth chambers, in the open state, the adjustable baffle has an included angle with the second fixed baffle, which is greater than 0 and less than or equal to 90 degrees.

3. The exhaust silencer according to claim 2, characterized in that The exhaust muffler further comprises a rotating shaft and a driving mechanism, the adjustable baffle is connected with the rotating shaft, the rotating shaft is connected with the driving mechanism, and the driving mechanism is used to drive the rotating shaft to rotate so as to drive the adjustable baffle to rotate.

4. The exhaust silencer according to claim 3, characterized in that The driving mechanism is arranged outside the muffling cavity.

5. The exhaust silencer according to claim 1, characterized in that The adjustable baffle is provided with a plurality of damping holes.

6. The exhaust silencer according to claim 1, characterized in that The first fixed baffle is provided with a plurality of first damping holes, and the second fixed baffle is provided with a plurality of second damping holes.

7. The exhaust silencer according to claim 6, characterized in that The gas pipe assembly comprises an air inlet pipe, a connecting pipe and an air outlet pipe, the air inlet pipe is in communication with the second chamber to introduce the gas flow into the second chamber from outside, one end of the connecting pipe is in communication with the first chamber, the other end of the connecting pipe is in communication with the third chamber, one end of the air outlet pipe is in communication with the third chamber, and the other end of the air outlet pipe is in communication with outside to discharge the damped gas flow.

8. The exhaust silencer according to claim 7, characterized in that The air inlet pipe is arranged in an L shape, one end of the air inlet pipe is located outside the receiving cavity, and the other end of the air inlet pipe penetrates the second fixed baffle through the third chamber.

9. The exhaust silencer according to claim 7, characterized in that The muffling cavity comprises a cylinder and first and second end covers located at both ends of the cylinder, the cylinder forms the receiving cavity, the first and second end covers are respectively located at openings of the cylinder, the first end cover is arranged close to the adjustable baffle, and the second end cover is arranged close to the first fixed baffle, The air outlet pipe penetrates the second fixed baffle, the first fixed baffle and the second end cover in sequence.

10. An automobile characterized by comprising: The automobile comprises the exhaust muffler according to any one of claims 1-9.

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