JP3029214U - Muffler for internal combustion engine - Google Patents

Abstract

(57) Abstract: To provide a muffler that is excellent in heat dissipation, is lightweight and inexpensive, and can emit exhaust sound more familiar than before. SOLUTION: In a muffler for an internal combustion engine in which a muffling part is installed in the middle of an exhaust pipe, the exhaust pipe and the muffling part are made of an aluminum material, and the inner wall surface and the outer wall surface of the exhaust pipe and the muffling part are hard-anodized. It is a muffler for internal combustion engine.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 This invention relates to a muffler for an internal combustion engine.

[0002]

[Prior art]

 Conventionally, this type of muffler was made of an iron material, but in recent years, it has been considered to use an aluminum material, which is excellent in heat radiation effect, lightweight and inexpensive.

[0003]

[Problems to be solved by the device]

 However, due to the nature of the material, the exhaust noise of this aluminum muffler is lower than that of conventional iron materials, so it is not possible to emit the exhaust noise of motorcycles, etc. that are familiar to us. As a result, there was a problem that it was not suitable for motorcycles and the like.

An object of this invention is to eliminate such inconvenience.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, in an internal combustion engine muffler according to the present invention, in an internal combustion engine muffler in which a muffler is installed in the middle of an exhaust pipe, the exhaust pipe and the muffler are made of an aluminum material and the exhaust gas is exhausted. Since the inner wall surface and outer wall surface of the pipe and the muffling part were hard-anodized, the number of vibrations of the wall part in the exhaust pipe and the muffling part increased, and as a result, the exhaust sound was almost equal to the exhaust sound of the iron material muffler. It can be done.

[0006]

[Explanation of the implementation of the device]

 FIG. 1 is a front view of a muffler for an internal combustion engine according to the present invention, FIG. 2 is an enlarged sectional view of a II portion in FIG. 1, and FIG. 3 is an enlarged sectional view of a portion of an aluminum material which has been anodized.

In FIG. 1, reference numeral 1 denotes a front pipe of an internal combustion engine muffler M, which is connected to an exhaust port of an internal combustion engine (not shown) via a flange 11 welded to its tip. S is a first muffling section, the upstream side of which is connected to the rear end of the front pipe 1. Reference numeral 2 denotes a first center pipe, the tip of which is connected to the downstream side of the first silencing part S. A flange 21 is welded to the rear end of the first center pipe 2. Reference numeral 3 denotes a second center pipe, the tip of which is bolted and fixed to a flange (welded) 21 of the first center pipe 2 through a flange (welded) 31. Therefore, the first center pipe 2 and the second center pipe 3 function as one pipe. T is a second muffling section, the upstream side of which is connected to the rear end of the second center tube 3. Reference numeral 4 denotes a tail joining pipe, the front end of which is connected to the downstream side of the second silencing part T and the rear end of which is fitted to the tail pipe 5.

The front pipe 1, the first center pipe 2, the second center pipe 3, the tail joining pipe 4 and the tail pipe 5 are made of an aluminum material, and as shown in FIG. The barrier layer 91 and the coating layer 92 are formed on the surface (aluminum material A) by the treatment. The series of the front pipe 1, the first center pipe 2, the second center pipe 3, the tail joining pipe 4 and the tail pipe 5 correspond to the "exhaust pipe" of the present invention.

Next, in FIG. 2, reference numeral 6 denotes an outer cylinder of the first muffling section S, the openings at both ends of which are closed by screwing the wall plates 61 and 62. The wall plate 61 is welded to the rear end of the front pipe 1, and the wall plate 62 is welded to the front end of the first center pipe 2.

Reference numeral 7 denotes an inner cylinder of the first muffling section S, which is interposed in the outer cylinder 6 between the rear end of the front pipe 1 and the front end of the first center pipe 2. Therefore, the exhaust gas flows from the front pipe 1 to the first center pipe 2 via the inner cylinder 7. 71, 71, ... Are pores and are formed on the wall surface of the inner cylinder 7. Further, 8 is a glass wool, which is packed in a muffling chamber 9 between the inner cylinder 7 and the outer cylinder 6. When the exhaust gas passes through the inner cylinder 7, it enters the muffling chamber 9 through the pores 71, 71, ... And is absorbed by the glass wool 8. Therefore, some muffling can be achieved. The second muffling section T has the same structure.

The inner cylinder 7, the outer cylinder 6, and the wall plates 61, 62 are also made of an aluminum material, and as shown in FIG. 3, the surface (aluminum material A) has a hard alumite treatment. As a result of being applied, it has a barrier layer 91 and a coating layer 92 on its surface.

The bolt and nut members used in the above-mentioned examples are both made of an aluminum material, and the surface (aluminum material A) is also subjected to a hard alumite treatment.

[0014]

[Effect of device]

 The muffler for an internal combustion engine according to the present invention is an muffler for an internal combustion engine in which a muffler is installed in the middle of an exhaust pipe, and the exhaust pipe and the muffler are made of an aluminum material, and the exhaust pipe and the muffler have an inner wall surface. The hard alumite treatment of the outer wall surface and the outer wall surface increases the number of vibrations of the wall part in the exhaust pipe and the sound deadening part, and as a result, the exhaust sound can be made approximately equal to the exhaust sound of the iron material muffler.

The present invention can provide a muffler which is excellent in heat dissipation effect, is lightweight and inexpensive, and can emit exhaust sound more familiar than before.

[Brief description of drawings]

FIG. 1 is a front view of a muffler for an internal combustion engine according to the present invention.

FIG. 2 is an enlarged sectional view of a II part in FIG.

FIG. 3 is an enlarged cross-sectional view of a part of the muffler treated with hard alumite.

[Explanation of symbols]

 S ... First muffling part (muffling part) T ... Second muffling part (muffling part) M ... Internal combustion engine muffler A ... Aluminum material 1 ... Front pipe (exhaust pipe) 2 ... First center pipe (exhaust pipe) 3 ... Second center pipe (exhaust pipe) 4 ... Tail joining pipe (exhaust pipe) 5 ... Tail pipe (exhaust pipe)

Claims (1)

[Scope of utility model registration request] 1. A muffler for an internal combustion engine, wherein a muffler is installed in the middle of an exhaust pipe. The exhaust pipe and the muffler are made of an aluminum material, and the inner wall and the outer wall of the exhaust pipe and the muffler are made of hard alumite. A muffler for an internal combustion engine, which has been treated.