CN211258850U - A muffler device for an air intake pipe of an automobile and an automobile - Google Patents

Abstract

The utility model discloses a noise eliminator and car for car intake pipe, this noise eliminator locates the connecting bend in the intake pipe including the cover at least, locate the fan ring casing on connecting bend surface, fan ring casing constitutes the anechoic chamber with the connecting bend cooperation, the anechoic chamber includes a plurality of grades of fan ring cavity units, each fan ring cavity unit is including relative and cut off first fan cavity and the second fan cavity that sets up, the anechoic chamber sets up to two kinds of fan-shaped structures that cut off each other, the anechoic chamber of two kinds of types is mutually supported, the noise cancelling effect preferred in the (1000 additionally-used 3000) frequency band, and be applicable to and install in the motorcycle type that the space is restricted.

Description

A muffler device for an air intake pipe of an automobile and an automobile

technical field

The utility model relates to the field of auto parts, in particular to a muffler device for an air intake pipe of an automobile and an automobile.

Background technique

The application of turbocharger to the engine can improve the power and economy of the car, but it will also seriously affect the NVH performance of the car (noise, vibration and harshness). Exhaust gas turbochargers were more commonly used in diesel vehicles in the past, and gasoline vehicles are now more commonly used, especially in passenger cars, which makes the optimization of the NVH performance of turbochargers attract the attention of major car companies.

The typical working speed of the exhaust gas turbocharger ranges from 100,000 to 200,000 rpm. The airflow noise energy generated by the high-speed rotation of the impeller on the compressor side is mainly concentrated in the [1000-3000] Hz frequency band. The turbocharger side also needs to consider the effect of high temperature on the muffler frequency. Therefore, the test results for the impedance tube should be in [800-2600]. In the past, most of them were made into annular mufflers along the pipeline, and the design frequency was generally higher than 1000Hz.

It is well known to those skilled in the art that the lower the frequency, the larger the muffler space is. However, at present, the components in some models are relatively closely arranged, and other components are arranged around the intake pipe, such as another pipe. Therefore, the muffler space is limited, and a suitable annular muffler cavity cannot be arranged within a range of 270°.

Utility model content

The purpose of the utility model is to overcome the defects in the prior art, and for vehicles with insufficient space around the intake pipe, a muffler device for an automobile intake pipe and an automobile are provided to achieve an effective muffler effect.

In order to solve the above-mentioned technical problems, the utility model proposes the following first technical scheme:

A muffler device for an air intake pipe of an automobile, the muffler device at least comprises a connecting elbow sleeved on the intake pipe, a fan-shaped casing arranged on the surface of the connecting elbow, the fan-shaped casing A muffler cavity is formed in cooperation with the connecting elbow, and the muffler cavity includes several stages of fan-shaped cavity units, and each fan-shaped cavity unit includes a first fan-shaped cavity and a second fan-shaped cavity which are oppositely and cut off.

In some preferred embodiments, the central angle of the first fan-shaped cavity is (80-100)°, and the central angle of the second fan-shaped cavity is (245-265)°.

In some preferred embodiments, in the muffler cavity, the diameter of the first fan-shaped cavity is gradually changed.

In some preferred embodiments, the diameter of the first fan-shaped cavity near the intake end of the intake pipe is the largest.

In some preferred embodiments, the diameter of the first fan-shaped cavity is larger than the diameter of the second fan-shaped cavity.

In some preferred embodiments, the central angle of the first fan-shaped cavity is 90°, and the central angle of the second fan-shaped cavity is 255°.

In some preferred embodiments, the muffling device further comprises a first partition plate disposed between two adjacent fan-shaped cavity units, and a first partition plate disposed between the first fan-shaped cavity and the second fan-shaped cavity the second partition between.

In some preferred embodiments, the corresponding connecting elbows in the first fan-shaped cavity and the second fan-shaped cavity are provided with a plurality of muffling holes.

The utility model also proposes the following second technical scheme:

An automobile includes the muffler device.

The beneficial effects brought by the technical solutions provided by the embodiments of the present utility model are:

The utility model protects a muffler device for an air intake pipe of an automobile. The muffler device at least comprises a connecting elbow sleeved on the intake pipe, a fan annular casing arranged on the surface of the connecting elbow, the fan annular casing and the connecting elbow The anechoic cavity is formed by the cooperation of the pipes. The anechoic cavity includes several levels of fan-shaped annular cavity units, and each annular fan-shaped cavity unit includes a first fan-shaped cavity and a second fan-shaped cavity that are opposite and separated. The muffler device sets the muffler cavity into two. A fan-shaped structure that is isolated from each other, two types of anechoic chambers cooperate with each other, and the silencing effect in the [1000-3000] frequency band is better;

Further, in a fan-shaped cavity unit, the central angle of the first fan-shaped cavity is (80-100)°, the central angle of the second fan-shaped cavity is (245-265)°, and the diameter of the first fan-shaped cavity is larger than that of the second fan-shaped cavity. The diameter of the cavity is suitable for installation in vehicles with limited space, and when installing, install the first fan-shaped cavity on the side with a larger space, and install the second fan-shaped cavity on the side with a smaller space. The noise cancellation effect is better in the [800-2600] frequency band.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a three-dimensional structural view of a muffler device for an air intake pipe of an automobile in the first embodiment;

Fig. 2 is the sectional view of A-A section in Fig. 1;

Fig. 3 is the sectional view of the B-B section in Fig. 1;

FIG. 4 is a change diagram of the transmission loss after the noise reduction device of the first embodiment is installed in the automobile in the first embodiment.

FIG. 5 is a schematic view of the assembly of the muffler device in the automobile according to the second embodiment.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described implementation The examples are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "X-axis", "Y-axis", "Z-axis", "perpendicular", "parallel", "upper", "lower", "front", "rear", "left" ", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, only It is for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The following describes in detail a muffler device for an air intake pipe of an automobile and a specific structure of an automobile protected by the present invention with reference to the accompanying drawings 1-5.

Example 1

As shown in FIGS. 1 to 3 , the present embodiment provides a muffler device 100 for an air intake pipe of an automobile. The muffler device 100 at least includes a connecting elbow 1 sleeved on the intake pipe (not shown), a device The fan-shaped casing 2 on the surface of the connecting elbow 1, the fan-shaped casing 2 cooperates with the connecting elbow 1 to form a sound-absorbing cavity.

The muffler cavity includes several stages of fan-shaped annular cavity units 4, and adjacent fan-shaped annular cavity units 4 are closely arranged. Each fan-shaped cavity unit 4 includes a first fan-shaped cavity 41 and a second fan-shaped cavity 42 which are arranged opposite to each other, that is, the first fan-shaped cavity 41 and the second fan-shaped cavity 42 are located in the same hollow annular body. In this embodiment, seven fan-shaped cavity units 4 are provided, so the noise reduction intensity includes seven first fan-shaped cavities 41 and seven second fan-shaped cavities 42 , a total of 14 cavities.

The muffler device 100 further includes a plurality of first partitions 5 disposed between two adjacent fan-shaped cavity units 4 , and a second partition disposed between the first fan-shaped cavity 41 and the second fan-shaped cavity 42 6.

In order to allow the noise in the intake pipe to enter the muffler cavity, a plurality of muffling holes 11 are provided in the corresponding connecting elbows 1 in the first fan-shaped cavity 41 and the second fan-shaped cavity.

In the anechoic cavity, the diameter of the first sector 41 varies gradually, and the diameter of the second sector 42 is equal everywhere. As a preference, the diameter of the first fan-shaped cavity 41 close to the intake end of the intake pipe is the largest, so as to improve the noise reduction efficiency.

The sum of the central angle of the first fan-shaped cavity and the central angle of the second fan-shaped cavity does not exceed 360°, and the central angle of the first fan-shaped cavity is smaller, and the central angle of the second fan-shaped cavity is larger. Usually, the central angle of the first fan-shaped cavity is (80-100)°, and the central angle of the second fan-shaped cavity is (245-260)°. As a preference, the central angle of the first fan-shaped cavity is preferably 90°, and the central angle of the second fan-shaped cavity is preferably 255°.

As shown in FIG. 4 , after testing, the muffler in this embodiment has a large transmission loss in the [1000-3000] frequency band, and has a better noise reduction effect.

The utility model provides a muffler device for an air intake pipe of an automobile. The muffler device at least comprises a connecting elbow sleeved on the intake pipe, a fan annular casing arranged on the surface of the connecting elbow, the fan annular casing and the connecting elbow The pipe cooperates to form a muffler cavity, and the muffler cavity includes several stages of fan-shaped cavity units, each fan-shaped cavity unit includes a first fan-shaped cavity and a second fan-shaped cavity arranged oppositely and separated, and the muffler device sets the muffler cavity into two parts. It is a fan-shaped structure that is isolated from each other, and the two types of anechoic chambers cooperate with each other, and the silencing effect in the [1000-3000] frequency band is better.

Example 2

As shown in FIG. 5 , this embodiment provides an automobile, which includes the muffler device 100 described in Embodiment 1, the muffler device 100 is installed on the air intake pipe 200 of the automobile, and is used for the space for installing the muffler device very limited. For the specific structure of the noise reduction device, please refer to the corresponding description in Embodiment 1, which will not be repeated in this embodiment.

During assembly, due to the large radius of the first fan-shaped cavity and the small central angle, the required space is not large, so the first fan-shaped cavity can be installed on the side with the larger space; However, the radius is small, and the required space is actually not large. It can be installed on the side of the small space, so that when the installation space is limited, a technology with better noise reduction effect in the [800-2600] frequency band can be obtained. Effect.

It should be noted that the above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model, All should be included within the protection scope of the present invention.

Claims (9)

1. A muffler device for an air intake pipe of an automobile, characterized in that the muffler device at least comprises a connecting elbow sleeved on the intake pipe, a fan-shaped annular casing arranged on the surface of the connecting elbow , the fan-shaped casing and the connecting elbow cooperate to form a muffler cavity, the muffler cavity includes several stages of fan-shaped cavity units, and each fan-shaped cavity unit includes a first fan-shaped cavity and The second fan-shaped cavity. 2 . The muffler device according to claim 1 , wherein the central angle of the first fan-shaped cavity is 80°˜100°, and the central angle of the second fan-shaped cavity is 245°˜265°. 3 . 3 . The muffling device according to claim 1 or 2 , wherein, in the muffling cavity, the diameter of the first fan-shaped cavity is gradually changing. 4 . 4 . The muffler device according to claim 3 , wherein the diameter of the first fan-shaped cavity near the intake end of the intake pipe is the largest. 5 . 5 . The muffling device according to claim 1 , wherein the diameter of the first fan-shaped cavity is larger than the diameter of the second fan-shaped cavity. 6 . 6 . The muffler device according to claim 5 , wherein the central angle of the first fan-shaped cavity is 90°, and the central angle of the second fan-shaped cavity is 255°. 7 . 7 . The muffling device according to claim 6 , wherein the muffling device further comprises a first partition plate arranged between two adjacent fan-shaped annular cavity units, and a first partition plate arranged on the first The second partition between the fan-shaped cavity and the second fan-shaped cavity. 8. The muffler device according to claim 1, 2, 4, 6 or 7, wherein a plurality of muffling holes are provided in the corresponding connecting elbows in the first fan-shaped cavity and the second fan-shaped cavity. 9 . An automobile, characterized in that it comprises the muffler device according to any one of claims 1 to 7 . 10 .

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