A muffler and intake pipe structure for an automobile engine intake system

Abstract

The utility model discloses a muffler and an intake pipe structure for an automobile engine intake system, and relates to the technical field of engines; the muffler and the intake pipe structure at least comprise a first resonant cavity and a second resonant cavity arranged side by side; the first resonant cavity and the second resonant cavity are connected by a rotating component, and the first resonant cavity and the second resonant cavity are relatively rotated by the rotating component to adjust the angle between the first resonant cavity and the second resonant cavity; by setting a plurality of resonant cavities, the noise problem of two most prominent engine speed sections can be solved, and the destructive interference generated by the resonance of the resonant cavities can be reduced to reduce the sound to be eliminated, so as to achieve the purpose of muffler and noise reduction, and realize that the distance and angle between the first resonant cavity and the second resonant cavity can be adaptively adjusted according to the intake pipe, so as to realize the precise docking between the first resonant cavity and the second resonant cavity and the intake pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of engines, and in particular relates to a muffler and an intake pipe structure used in an intake system of an automobile engine. Background Art

[0002] The resonant cavity usually consists of a cavity and an intake pipe with a smaller diameter. Its acoustic characteristics can be changed by adjusting their structures. Its working principle is mainly to reduce the sound to be eliminated through the destructive interference generated by resonance, thereby achieving the purpose of noise reduction. Due to the large operating speed range of the engine, the modal frequency of the acoustic cavity of the intake system inevitably has a resonant frequency band with the cab, which causes high noise in the cab in a specific engine speed range, affecting the driving experience. Therefore, a resonant cavity is added to the intake pipe to solve the noise problem in the engine speed range.

[0003] However, the existing resonant cavity structure is usually fixedly connected to the intake pipe. If multiple resonant cavities are provided, the multiple resonant cavities are fixedly connected to form an integrated structure, and the angles between the multiple resonant cavities cannot be adjusted. In addition, due to processing errors at the interfaces of the intake pipe and between the multiple resonant cavities, as well as deformation caused by the influence of the external environment, there are centering deviations at the connecting ports of the multiple resonant cavities. As a result, when one resonant cavity is connected to the intake pipe, another or multiple resonant cavities cannot be accurately docked with the corresponding interfaces on the intake pipe, resulting in the inability to accurately connect the multiple resonant cavities to the intake pipe. Utility Model Content

[0004] The utility model provides a muffler and an intake pipe structure for an automobile engine intake system, so as to solve the problem that a plurality of resonance cavities and the intake pipes cannot be accurately butted due to centering deviations caused by processing and deformation.

[0005] The technical solution adopted by the utility model is:

[0006] A muffler for an automobile engine intake system comprises at least a first resonant cavity and a second resonant cavity arranged side by side; the first resonant cavity and the second resonant cavity are connected by a rotating component, and the first resonant cavity and the second resonant cavity are relatively rotated by the rotating component to adjust the angle between the first resonant cavity and the second resonant cavity.

[0007] The utility model also has the following additional technical features:

[0008] The rotating assembly includes a first connecting shaft, a second connecting shaft, a third connecting shaft and a connecting assembly; the first connecting shaft is hingedly connected to the first resonant cavity, the second connecting shaft and the third connecting shaft are symmetrically hingedly connected to the second resonant cavity, the connecting assembly includes a connecting ring and a connecting rod, the connecting rod connects the second connecting shaft and the end of the third connecting shaft that is not connected to the second resonant cavity, the connecting ring is connected to the end of the first connecting shaft that is not connected to the first resonant cavity, and the connecting ring is rotatably connected to the connecting rod.

[0009] The circumferential inner wall of the connecting ring is provided with a plurality of grooves along the circumferential direction, and the connecting rod has a plurality of protrusions distributed along the circumferential direction corresponding to the side wall of the connecting ring. The grooves and protrusions are adapted to enable the connecting rod to rotate relative to the connecting ring at a preset angle and be locked in the connecting ring.

[0010] The rotating assembly includes a first rotating shaft, a second rotating shaft and a rotating pin; the first rotating shaft is hingedly connected to the first resonant cavity, the second rotating shaft is hingedly connected to the second resonant cavity, and the first rotating shaft and the second rotating shaft are rotatably connected via the rotating pin.

[0011] The rotating assembly also includes a locking structure, which includes a first positioning ring, a second positioning ring and a locking spring; the first positioning ring is connected to the first resonant cavity, the second positioning ring is connected to the second resonant cavity, and the locking spring has hook-shaped connecting ends at both ends along the axis that can be connected to the first positioning ring and the second positioning ring respectively.

[0012] A first cavity is formed inside the first resonant cavity, and the first resonant cavity is provided with a first air inlet connected to the first cavity; the first air inlet is used to be connected to an air inlet pipe.

[0013] The second resonant cavity has a second cavity body inside, and the second resonant cavity is provided with a second air inlet port communicating with the second cavity body, and the second air inlet port is used to be connected to an air inlet pipe.

[0014] The muffler for the automobile engine intake system also includes a third resonant cavity, which is connected to the side of the second resonant cavity away from the first resonant cavity, and has a third cavity inside; the first cavity, the second cavity and the third cavity gradually increase along the intake direction of the intake pipe.

[0015] The muffler for the automobile engine intake system also includes a fourth resonant cavity, which is symmetrically arranged in parallel with the first resonant cavity with the axis of the intake pipe as the center. A waveguide device is installed between the fourth resonant cavity and the first resonant cavity. The waveguide device is connected to the first resonant cavity and the fourth resonant cavity through a two-way power meter, and is used to divide the microwave source power of the waveguide device into two equal parts and feed them into the first resonant cavity and the fourth resonant cavity respectively.

[0016] The present application also relates to an intake pipe structure for an automobile engine intake system, based on the above-mentioned muffler for an automobile engine intake system, comprising an intake pipe and a muffler connected to the intake pipe; the muffler comprises at least a first resonant cavity and a second resonant cavity, the first resonant cavity and the second resonant cavity are connected by a rotating component, the first resonant cavity is connected to the intake pipe through a first air inlet, and the second resonant cavity is connected to the intake pipe through a second air inlet.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0018] 1. A muffler for an automobile engine intake system, comprising at least a first resonant cavity and a second resonant cavity arranged side by side; the first resonant cavity and the second resonant cavity are connected by a rotating assembly, and the first resonant cavity and the second resonant cavity are relatively rotated by the rotating assembly to adjust the angle between the first resonant cavity and the second resonant cavity. By setting a plurality of resonant cavities, the noise problem of the two most prominent engine speed sections can be solved, and the sound to be eliminated can be reduced by the destructive interference generated by the resonance of the resonant cavity, so as to achieve the purpose of noise reduction, and the angle between the first resonant cavity and the second resonant cavity is improved from the traditional non-adjustable angle to a relatively adjustable angle, so as to avoid the phenomenon that the first resonant cavity and the intake pipe, and the second resonant cavity and the intake pipe cannot be smoothly installed due to the processing error or deformation error between the first resonant cavity and the second resonant cavity and the intake pipe, so that the distance and angle between the first resonant cavity and the second resonant cavity can be adaptively adjusted according to the intake pipe, and the first resonant cavity and the second resonant cavity can be accurately docked with the intake pipe.

[0019] 2. As a preferred embodiment of the utility model, the rotating assembly includes a first connecting shaft, a second connecting shaft, a third connecting shaft and a connecting assembly; the first connecting shaft is hingedly connected to the first resonant cavity, the second connecting shaft and the third connecting shaft are symmetrically hingedly connected to the second resonant cavity, the connecting assembly includes a connecting ring and a connecting rod, the connecting rod is connected to the second connecting shaft and the end of the third connecting shaft that is not connected to the second resonant cavity, the connecting ring is connected to the end of the first connecting shaft that is not connected to the first resonant cavity, and the connecting ring is rotatably connected to the connecting rod. The first connecting shaft is used to connect the first resonant cavity, the second connecting shaft and the third connecting shaft are used to connect the second resonant cavity, the second connecting shaft and the third connecting shaft are connected through the connecting rod, the first connecting shaft is connected to the connecting ring, and the second connecting shaft and the third connecting shaft are rotated relative to the first connecting shaft through the rotational cooperation connection of the connecting rod and the connecting ring, so as to adjust the angle and spacing between the first resonant cavity and the second resonant cavity.

[0020] 3. As a preferred embodiment of the utility model, a plurality of grooves are arranged on the circumferential inner wall of the connecting ring along the circumferential direction, and the connecting rod has a plurality of protrusions distributed along the circumferential direction corresponding to the side wall of the connecting ring, and the grooves and protrusions are adapted to enable the connecting rod to rotate relative to the connecting ring at a preset angle and be locked in the connecting ring. A groove is arranged inside the connecting ring, and a protrusion that slides with the groove is arranged at the position corresponding to the groove of the connecting rod, and the protrusion can slide between the grooves to realize the rotation of the connecting rod relative to the inside of the connecting ring. At the same time, when the protrusion turns from one groove to another groove, when the outside stops applying a rotational force to the connecting rod, the protrusion can be connected with the corresponding groove by a snap connection, so that the connecting rod is locked in the connecting ring, and the first resonant cavity and the second resonant cavity are locked after a certain angle of relative rotation, thereby ensuring that the position between the first resonant cavity and the second resonant cavity will not change easily, improving the connection strength between the first resonant cavity and the second resonant cavity, facilitating the simultaneous installation of the first resonant cavity and the second resonant cavity, and realizing rapid assembly.

[0021] 4. As a preferred embodiment of the present invention, the rotating assembly further includes a locking structure, which includes a first positioning ring, a second positioning ring and a locking spring; the first positioning ring is connected to the first resonant cavity, the second positioning ring is connected to the second resonant cavity, and the locking spring has hook-shaped connecting ends at both ends along the axis that can be connected to the first positioning ring and the second positioning ring respectively. The first positioning ring is used to connect the first resonant cavity, and the second positioning ring is used to connect the second resonant cavity. By connecting the locking spring between the first positioning ring and the second positioning ring, an elastic connection between the first resonant cavity and the second resonant cavity is achieved. When the first resonant cavity and the second resonant cavity can rotate a certain angle, the locking spring will apply a force in the opposite direction to the first resonant cavity and the second resonant cavity, so that the first resonant cavity and the second resonant cavity maintain a preset angle, further ensuring the installation position between the first resonant cavity and the second resonant cavity, and preventing deformation between the first resonant cavity and the second resonant cavity.

[0022] 5. As a preferred embodiment of the utility model, the muffler for the intake system of the automobile engine also includes a third resonant cavity, the third resonant cavity is connected to the side of the second resonant cavity away from the first resonant cavity, and the third resonant cavity has a third cavity inside; the first cavity, the second cavity and the third cavity gradually increase along the intake direction of the intake pipe. By setting the third resonant cavity, and gradually increasing the intake space for gas to flow through on one side from the first resonant cavity to the third resonant cavity, the resonant noise frequency is improved to better match the initial high-position intake pipe resonant cavity frequency, which can effectively reduce the noise of the intake pipe and improve the purpose of noise reduction and noise elimination. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0024] Figure 1 A side structural diagram of a muffler for an automobile engine intake system according to one embodiment of the utility model;

[0025] Figure 2 This is a side structural view from another angle of a muffler for an automobile engine intake system according to an embodiment of the utility model.

[0026] 1 first resonant cavity, 2 second resonant cavity, 3 first rotating shaft, 4 second rotating shaft, 5 rotating pin, 6 third resonant cavity, 7 first air inlet, 8 second air inlet. DETAILED DESCRIPTION

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0028] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0031] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0032] The utility model relates to a muffler for an automobile engine intake system, such as Figure 1-2As shown, it at least includes a first resonant cavity 1 and a second resonant cavity 2 arranged side by side; the first resonant cavity 1 and the second resonant cavity 2 are connected by a rotating component, and the first resonant cavity 1 and the second resonant cavity 2 are relatively rotated by the rotating component to adjust the angle between the first resonant cavity 1 and the second resonant cavity 2.

[0033] Adding a resonance cavity to the high-position intake pipe of the vehicle's intake system will make the intake pipe larger and more expensive, and the space in the vehicle is limited, so increasing the volume will also be limited by the space, and the high-temperature intake pipe is usually designed to follow the shape of the cab, and the cost of making a mold is high. Different types of vehicles require molds of different shapes, resulting in higher manufacturing costs for the high-position intake pipe. In order to develop an intake pipe that can adapt to different types of models, reduce the noise of engine intake systems of different types, and match the frequency of the original high-position intake pipe resonance cavity, the present application designs a muffler that can be installed on the intake pipe to reduce the noise of engine intake systems of different types. According to the needs of the vehicle model, the sizes of multiple resonance cavities in the muffler can be changed to match the frequency of the original high-position intake pipe resonance cavity, thereby achieving noise reduction and silencing of the intake systems of different types of vehicles.

[0034] The present application designs at least two resonant cavities, namely the first resonant cavity 1 and the second resonant cavity 2. At the same time, the first resonant cavity 1 and the second resonant cavity 2 are respectively connected to one side of the intake pipe and arranged side by side. Traditionally, the first resonant cavity 1 and the second resonant cavity 2 are respectively fixedly connected and fixedly connected to the intake pipe, so the spacing and angle between the first resonant cavity 1 and the second resonant cavity 2 are not adjustable; however, due to the deviation of the interface position of the intake pipe relative to the first resonant cavity 1 or the second resonant cavity 2 due to processing and manufacturing and the influence of the environment, the first resonant cavity 1 or the second resonant cavity 2 is located at the intake pipe. When the corresponding interfaces of the first resonant cavity 1 and the second resonant cavity 2 are docked, the first resonant cavity 1 corresponds to the interface, while the second resonant cavity 2 cannot be docked with the interface; or, after the second resonant cavity 2 is connected to the interface, the first resonant cavity 1 cannot be docked with the interface. Therefore, in order to avoid this phenomenon, a rotating component is added between the first resonant cavity 1 and the second resonant cavity 2, so that the angle between the first resonant cavity 1 and the second resonant cavity 2 is adjustable. With this arrangement, the positions of the first resonant cavity 1 and the second resonant cavity 2 relative to the interface of the intake pipe can be adjusted, so that the first resonant cavity 1 and the second resonant cavity 2 can be smoothly docked with the intake pipe.

[0035] It is worth noting that since the relative error of the connection interface between the intake pipe and the first resonant cavity 1 and the second resonant cavity 2 is within a certain range, the first resonant cavity 1 and the second resonant cavity 2 usually do not need to rotate a large amplitude in actual applications. Usually, fine-tuning is sufficient to complete the docking. Therefore, there will be no phenomenon that the first resonant cavity 1 and the second resonant cavity 2 cannot be docked due to excessive rotation angle, resulting in a large change in the distance between the first resonant cavity 1 or the second resonant cavity 2 and the intake pipe.

[0036] By setting up multiple resonant cavities, the noise problems in the two most prominent engine speed ranges can be solved, and the destructive interference generated by the resonance of the resonant cavities can be used to reduce the sound to be eliminated, thereby achieving the purpose of sound elimination and noise reduction. In addition, the angle between the first resonant cavity 1 and the second resonant cavity 2 is improved from the traditional non-adjustable angle to a relatively adjustable angle, thereby avoiding the phenomenon that the first resonant cavity 1 and the intake pipe, and the second resonant cavity 2 and the intake pipe cannot be smoothly installed due to processing errors or deformation errors between the first resonant cavity 1 and the second resonant cavity 2 and the intake pipe, and the distance and angle between the first resonant cavity 1 and the second resonant cavity 2 can be adaptively adjusted according to the intake pipe, thereby achieving precise docking between the first resonant cavity 1 and the second resonant cavity 2 and the intake pipe.

[0037] With respect to the structure of the rotating assembly, any one of the following embodiments may be adopted, but is not specifically limited to this embodiment:

[0038] Embodiment 1: The rotating assembly includes a first connecting shaft, a second connecting shaft, a third connecting shaft and a connecting assembly; the first connecting shaft is hingedly connected to the first resonant cavity 1, the second connecting shaft and the third connecting shaft are symmetrically hingedly connected to the second resonant cavity 2, the connecting assembly includes a connecting ring and a connecting rod, the connecting rod connects the second connecting shaft and the end of the third connecting shaft that is not connected to the second resonant cavity 2, the connecting ring is connected to the end of the first connecting shaft that is not connected to the first resonant cavity 1, and the connecting ring is rotatably connected to the connecting rod.

[0039] The first connecting shaft is used to connect the first resonant cavity 1, the second connecting shaft and the third connecting shaft are used to connect the second resonant cavity 2, the second connecting shaft and the third connecting shaft are connected by a connecting rod, the first connecting shaft is connected to the connecting ring, and the second connecting shaft and the third connecting shaft are rotated relative to the first connecting shaft through the rotational cooperation connection of the connecting rod and the connecting ring, so as to adjust the angle and spacing between the first resonant cavity 1 and the second resonant cavity 2.

[0040] As a preferred embodiment, a plurality of grooves are arranged on the circumferential inner wall of the connecting ring along the circumferential direction, and the connecting rod has a plurality of protrusions distributed along the circumferential direction corresponding to the side wall of the connecting ring, and the connecting rod is adapted to the grooves and the protrusions so that the connecting rod can be rotated relative to the connecting ring by a preset angle and locked in the connecting ring.

[0041] A groove is provided inside the connecting ring, and a protrusion that slides with the groove is provided at the position of the connecting rod corresponding to the groove. The protrusion can slide between the grooves to realize the rotation of the connecting rod relative to the inside of the connecting ring. At the same time, when the protrusion turns from one groove to another, when the outside stops applying a rotational force to the connecting rod, the protrusion can be snap-connected with the corresponding groove to lock the connecting rod in the connecting ring, and the first resonant cavity 1 and the second resonant cavity 2 are locked after a certain angle of relative rotation, thereby ensuring that the position between the first resonant cavity 1 and the second resonant cavity 2 will not change easily, improving the connection strength between the first resonant cavity 1 and the second resonant cavity 2, and facilitating the simultaneous installation of the first resonant cavity 1 and the second resonant cavity 2 to achieve rapid assembly.

[0042] Embodiment 2: The rotating assembly includes a first rotating shaft 3, a second rotating shaft 4 and a rotating pin 5; the first rotating shaft 3 is hingedly connected to the first resonant cavity 1, the second rotating shaft 4 is hingedly connected to the second resonant cavity 2, and the first rotating shaft 3 and the second rotating shaft 4 are rotatably connected via the rotating pin 5.

[0043] Embodiment 1: The rotating pin 5 can adopt an interference fit between the first rotating shaft 3 and the second rotating shaft 4, so that the first rotating shaft 3 and the second rotating shaft 4 can be self-locked after being rotated relative to each other by a certain angle;

[0044] Example 2: As a preferred embodiment, the rotating assembly also includes a locking structure, which includes a first positioning ring, a second positioning ring and a locking spring; the first positioning ring is connected to the first resonant cavity 1, the second positioning ring is connected to the second resonant cavity 2, and the locking spring has hook-shaped connecting ends at both ends along the axis that can be connected to the first positioning ring and the second positioning ring respectively.

[0045] The first positioning ring is used to connect the first resonant cavity 1, and the second positioning ring is used to connect the second resonant cavity 2. A locking spring is connected between the first positioning ring and the second positioning ring to achieve an elastic connection between the first resonant cavity 1 and the second resonant cavity 2. When the first resonant cavity 1 and the second resonant cavity 2 can rotate a certain angle, the locking spring will apply a force in the opposite direction between the first resonant cavity 1 and the second resonant cavity 2, so that the first resonant cavity 1 and the second resonant cavity 2 maintain a preset angle, further ensuring the installation position between the first resonant cavity 1 and the second resonant cavity 2, and preventing deformation between the first resonant cavity 1 and the second resonant cavity 2.

[0046] As a preferred embodiment, a first cavity is formed inside the first resonant cavity 1, and the first resonant cavity 1 is provided with a first air inlet 7 connected to the first cavity; the first air inlet 7 is used to be connected to an air inlet pipe.

[0047] like Figure 1 As shown, the first resonance cavity 1 has a first air inlet 7 connected to the air inlet pipe. The gas entering the air inlet pipe enters the first resonance cavity 1 through the first air inlet 7, and the noise is reduced by the first resonance cavity 1, thereby reducing the sound to be eliminated.

[0048] As a preferred embodiment, the second resonant cavity 2 has a second cavity inside, and the second resonant cavity 2 is provided with a second interface communicating with the second cavity, and the second interface is used to be connected to the air intake pipe.

[0049] By adding the second resonance cavity 2 on the basis of the first resonance cavity 1, the gas entering the intake pipe passes through the first resonance cavity 1 and then enters the second resonance cavity 2 through the intake pipe, thereby eliminating the two frequency peaks reflected by the intake noise and enhancing the noise reduction and silencing function.

[0050] As a preferred embodiment, the muffler for the automobile engine intake system also includes a third resonance cavity 6, which is connected to the side of the second resonance cavity 2 away from the first resonance cavity 1, and the interior of the third resonance cavity 6 has a third cavity; the first cavity, the second cavity and the third cavity gradually increase along the intake direction of the intake pipe.

[0051] The following embodiments may be used to connect the third resonant cavity 6 and the second resonant cavity 2, but the specific connection structure between the third resonant cavity 6 and the second resonant cavity 2 is not limited by this embodiment:

[0052] Embodiment 1: A fourth rotating shaft is connected to the side of the second resonant cavity 2 facing the third resonant cavity 6, and a fifth rotating shaft is connected to the third resonant cavity 6. The third resonant cavity 6 is rotatably connected to the second resonant cavity 2 by the fourth rotating shaft and the fifth rotating shaft.

[0053] Embodiment 2: The third resonant cavity 6 is fixedly connected to the second resonant cavity 2. Specifically, the third resonant cavity 6 can be fixedly connected via a connecting piece, or can be directly processed and manufactured into an integrated structure.

[0054] By setting up the third resonance cavity 6, and gradually increasing the intake space for gas to flow through one side of the first resonance cavity 1 to the third resonance cavity 6, the resonance noise frequency is improved and more closely matches the initial high-position intake pipe resonance cavity frequency, which can effectively reduce the noise of the intake pipe and improve the purpose of noise reduction and noise elimination.

[0055] It is worth noting that the third resonant cavity 6 and the second resonant cavity 2 can also be arranged in parallel; or Figure 2 As shown, there may also be a preset angle between the third resonant cavity 6 and the second resonant cavity 2 , and the third resonant cavity 6 is tilted relative to the second resonant cavity 2 .

[0056] As a preferred embodiment, the muffler for the automobile engine intake system also includes a fourth resonant cavity, which is symmetrically arranged in parallel with the first resonant cavity 1 with the axis of the intake pipe as the center, and a waveguide device is installed between the fourth resonant cavity and the first resonant cavity 1. The waveguide device is connected to the first resonant cavity 1 and the fourth resonant cavity through a two-way power meter, and is used to divide the microwave source power of the waveguide device into two equal parts and feed them into the first resonant cavity 1 and the fourth resonant cavity respectively.

[0057] By setting a fourth resonant cavity, and the fourth resonant cavity can be parallel and symmetrical with the first resonant cavity 1, and connected through a waveguide device and a two-way power meter, the purpose is to use the waveguide device including a microwave source and a rectangular waveguide, and to set an automatic impedance adjustment device between the microwave source and the two-way power meter, so that the impedance of the impedance adjuster, the two-way power meter and the resonant cavity in series is equal to the intrinsic impedance of the waveguide, so that the impedance of the power meter and the resonant cavity are matched, and the microwave source power is equally divided into two by the two-way power meter, and respectively fed into the two parallel first resonant cavities 1 and the fourth resonant cavity, which can not only effectively improve the feeding power of the resonant cavity, but also effectively reduce the leakage of microwaves, and improve the function of sound elimination and noise reduction.

[0058] The present application also relates to an intake pipe structure for an automobile engine intake system, based on the above-mentioned muffler for an automobile engine intake system, comprising an intake pipe and a muffler connected to the intake pipe; the muffler comprises at least a first resonant cavity 1 and a second resonant cavity 2, the first resonant cavity 1 and the second resonant cavity 2 are connected by a rotating component, the first resonant cavity 1 is connected to the intake pipe by a first interface, and the second resonant cavity 2 is connected to the intake pipe by a second interface.

[0059] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0060] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0061] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A muffler for an automobile engine intake system, characterized in that: At least it includes a first resonant cavity and a second resonant cavity arranged side by side; the first resonant cavity and the second resonant cavity are connected by a rotating component, and the first resonant cavity and the second resonant cavity are relatively rotated by the rotating component to adjust the angle between the first resonant cavity and the second resonant cavity.

2. A muffler for an automobile engine intake system according to claim 1, characterized in that: The rotating assembly includes a first connecting shaft, a second connecting shaft, a third connecting shaft and a connecting assembly; the first connecting shaft is hingedly connected to the first resonant cavity, the second connecting shaft and the third connecting shaft are symmetrically hingedly connected to the second resonant cavity, the connecting assembly includes a connecting ring and a connecting rod, the connecting rod connects the second connecting shaft and the end of the third connecting shaft that is not connected to the second resonant cavity, the connecting ring is connected to the end of the first connecting shaft that is not connected to the first resonant cavity, and the connecting ring is rotatably connected to the connecting rod.

3. A muffler for an automobile engine intake system according to claim 2, characterized in that: The circumferential inner wall of the connecting ring is provided with a plurality of grooves along the circumferential direction, and the connecting rod has a plurality of protrusions distributed along the circumferential direction corresponding to the side wall of the connecting ring. The grooves and protrusions are adapted to enable the connecting rod to rotate relative to the connecting ring at a preset angle and be locked in the connecting ring.

4. A muffler for an automobile engine intake system according to claim 1, characterized in that: The rotating assembly includes a first rotating shaft, a second rotating shaft and a rotating pin; the first rotating shaft is hingedly connected to the first resonant cavity, the second rotating shaft is hingedly connected to the second resonant cavity, and the first rotating shaft and the second rotating shaft are rotatably connected via the rotating pin.

5. A muffler for an automobile engine intake system according to claim 4, characterized in that: The rotating assembly also includes a locking structure, which includes a first positioning ring, a second positioning ring and a locking spring; the first positioning ring is connected to the first resonant cavity, the second positioning ring is connected to the second resonant cavity, and the locking spring has hook-shaped connecting ends at both ends along the axis that can be connected to the first positioning ring and the second positioning ring respectively.

6. A muffler for an automobile engine intake system according to claim 1, characterized in that: A first cavity is formed inside the first resonant cavity, and the first resonant cavity is provided with a first air inlet connected to the first cavity; the first air inlet is used to be connected to an air inlet pipe.

7. A muffler for an automobile engine intake system according to claim 6, characterized in that: The second resonant cavity has a second cavity body inside, and the second resonant cavity is provided with a second air inlet port communicating with the second cavity body, and the second air inlet port is used to be connected to an air inlet pipe.

8. A muffler for an automobile engine intake system according to claim 7, characterized in that: It also includes a third resonant cavity, which is connected to a side of the second resonant cavity away from the first resonant cavity, and has a third cavity inside; the first cavity, the second cavity and the third cavity gradually increase along the air intake direction of the intake pipe.

9. A muffler for an automobile engine intake system according to claim 8, characterized in that: The invention also includes a fourth resonant cavity, which is symmetrically arranged in parallel with the first resonant cavity with the axis of the air inlet pipe as the center. A waveguide device is installed between the fourth resonant cavity and the first resonant cavity. The waveguide device is connected to the first resonant cavity and the fourth resonant cavity through a two-way power meter, and is used to divide the microwave source power of the waveguide device into two equal parts and feed them into the first resonant cavity and the fourth resonant cavity respectively.

10. An intake pipe structure for an automobile engine intake system, based on a muffler for an automobile engine intake system according to any one of claims 1 to 9, characterized in that: It includes an air intake pipe and a muffler connected to the air intake pipe; the muffler includes at least a first resonant cavity and a second resonant cavity, the first resonant cavity and the second resonant cavity are connected through a rotating component, the first resonant cavity is connected to the air intake pipe through a first air intake port, and the second resonant cavity is connected to the air intake pipe through a second air intake port.

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