RU5212U1 - INTERNAL COMBUSTION ENGINE EXHAUST SILENCER - Google Patents

Abstract

1. The silencer of the exhaust exhaust of an internal combustion engine, comprising a housing with end walls, a first transverse perforated partition, an inlet and an outlet pipe, the inner sections of which are located at equal distances from the partition, and a section of one pipe is placed at an equal distance from the end walls, a section of the other is at an equal distance between the slice of the first and end wall, and the inner section of the outlet pipe is perforated, characterized in that it further comprises a second and third perforation partitioned walls located on both sides of the first and forming the first and second intermediate chambers with it, the inner section of the inlet pipe is also perforated, and the perforation of the inlet and outlet pipes is located in the second and first intermediate chambers, respectively. 2. A muffler according to claim 1, characterized in that the internal cut of the outlet pipe is made in the form of a comb with ridges height 0.25 - 1.0 of the diameter of the outlet pipe, and the total area of the ridges of the ridges 0.5 - 1.0 of the cross-sectional area of the outlet pipe.

Description

MKH: F01N 1/02

INTERNAL COMBUSTION ENGINE EXHAUST SILENCER

The utility model relates to mechanical engineering, mainly to devices for noise attenuation, in particular to silencers of exhaust emissions of internal combustion engines.

Known exhaust silencer for internal combustion engines, containing a housing with end walls, a transverse perforated partition, inlet and outlet pipes, the inner sections of which are located on both sides of the partition / 1 /.

The disadvantages of such a muffler are the presence of bandwidths in the spectrum of the muffler associated with the resonant interaction; their volumes at the input and output of the muffler and the reduced noise suppression efficiency due to the non-optimal arrangement of the cuts of the inlet and outlet pipes.

A known exhaust silencer for internal combustion engines, containing porridge; a housing with end walls, a transverse perforated partition, inlet and outlet pipes, the inner sections of which are located at equal distances from the partition, and a section of one pipe is placed along the axis of the housing at an equal distance from the end walls, and the slice of the other - at an equal distance between the slice of the first and the end wall in the center of gravity of the conditional

quadrant of the cross section of the body. The inner portion of the outlet may be perforated 111.

However, such a silencer does not provide sufficient stun noise efficiency.

This drawback is eliminated by the fact that the exhaust silencer of the internal combustion engine comprising a housing with end walls, a first transverse perforated partition, inlet and outlet pipes, the inner sections of which are located at equal distances from the partition, and a section of one pipe is placed at an equal distance from the end walls , the slice of the other is equal

the distance between the slice of the first and end walls, and the inner section of the outlet pipe is perforated, additionally contains a second and third perforated partitions located on both sides of the first and forming; with it, the first and second intermediate chambers, the inner section of the inlet pipe is also perforated, moreover, the perforation of the inlet and outlet pipes is located; in the second and first intermediate chambers, respectively, the inner cut of the outlet pipe is made in the form of a comb with a high the ridges from 0.25 to 1.0 of the diameter of the outlet pipe, and the total area of the ridges of the ridges from 0.5 to 1.0 of the cross-sectional area of the outlet pipe. the second intermediate chambers, the inner section of the inlet pipe is also perforated, and the perforation of the inlet and outlet pipes is located in the second and first intermediate chambers, respectively, and the inner section of the outlet pipe is made in the form of a comb with a height of ridges from 0.25 to 1.0 of the diameter of the outlet pipe and the total area of the ridges of the ridges from 0.5 to 1.0 of the cross-sectional area of the outlet pipe. Therefore, the claimed combination of features is new, i.e. the patentability condition of the novelty utility model is satisfied. Supplying the muffler with two additional perforated partitions, making the inner portion of the inlet pipe perforated and arranging the perforations of the inlet and outlet pipes in the intermediate chambers allows the intermediate chambers to be used as expansion chambers and as resonators. Performing an internal cut of the outlet pipe in the form of a comb helps to suppress the resonant oscillations of the gas at the exit pipe section. In FIG. 1 shows a silencer of exhaust noise from an internal combustion engine, a longitudinal section. In Fig.2 cross section GG in Fig.1. In FIG. 3, the section DD in FIG. 1. Figure 4 is a view of the inner slice of the outlet pipe with options for comb. The muffler contains a housing 1 with input 2 and output 3 end

walls, input 4 and output 5 nozzles installed in the end walls, the first 6, second 7, third 8 perforated partitions. The second perforated partition 7 forms an inlet chamber 9 with the output end wall 3. The first perforated partition 6 forms the first 10 and second 11 intermediate chambers with the second 7 and third 8 perforated partitions, respectively. The third perforated partition 8 forms an outlet chamber 12 with the inlet end wall 2. The inner section of the inlet pipe 4 is made with a perforation 13, which is located in the intermediate chamber 11. The inner section of the outlet pipe 5 is made with a perforation 14, located in the intermediate chamber 10. An inner cut of the outlet the pipe is made in the form of combs 15.

Silencer works as follows.

The exhaust gas stream from the internal combustion engine enters through the inlet pipe 4 into the silencer body 1. Part of the stream A

(see figure 1 and figure 2) passes through the perforation 13 of the pipe 4 into the chamber 11, and this part of the flow is divided into jets and distributed in the radial direction along the volume of the chamber 11 (see figure 2).

Another part of the flow enters the silencer chamber 9, where it expands, losing speed and sound energy, and then passes through the perforated partition 7 into the chamber 10, where it is divided into

4.

two threads. The stream B passes through the perforation 14 of the outlet pipe 5 (see Fig. 3). The stream B passes through the perforated partition 6 and enters the chamber 11, and the jets of stream B meet with the jets of stream A.

Next, the combined note of VA passes through the perforated

the partition 8 into the chamber 12. Pot9K VA, passing through the pipe 5, intersects on its way with the radial jets of stream B, which are additionally

extinguish sound energy.

The resonances of the gas stream at the exit pipe 5 are suppressed using the comb 15.

The efficiency of sound attenuation of the gas flow is achieved through the use of expansion chambers (inlet, intermediate and exhaust), screens (end walls and perforated partitions) and resonators (intermediate chambers).

FROM/

Claims (2)

1. The silencer of the exhaust exhaust of an internal combustion engine, comprising a housing with end walls, a first transverse perforated partition, an inlet and an outlet pipe, the inner sections of which are located at equal distances from the partition, and a section of one pipe is placed at an equal distance from the end walls, a section of the other is at an equal distance between the slice of the first and end wall, and the inner section of the outlet pipe is perforated, characterized in that it further comprises a second and third perforation partitioned walls located on both sides of the first and forming the first and second intermediate chambers with it, the inner section of the inlet pipe is also perforated, and the perforation of the inlet and outlet pipes is located in the second and first intermediate chambers, respectively.  2. The muffler according to claim 1, characterized in that the internal cut of the outlet pipe is made in the form of a comb with ridges height 0.25 - 1.0 of the diameter of the outlet pipe, and the total area of the ridges of the ridges 0.5 - 1.0 of the cross-sectional area of the outlet pipe .