CN201241746Y

CN201241746Y - Electric impedance silencer for light truck

Info

Publication number: CN201241746Y
Application number: CNU2008200394408U
Authority: CN
Inventors: 宋华; 李立波
Original assignee: Anhui Jianghuai Automobile Group Corp
Current assignee: Anhui Jianghuai Automobile Group Corp
Priority date: 2008-08-21
Filing date: 2008-08-21
Publication date: 2009-05-20
Anticipated expiration: 2018-08-21

Abstract

The utility model relates to a light truck resistance muffler, for resolving the problems of the prior light truck mufflers such as bad muffle effect on the exhaust noise of high and medium frequencies. The tube of the resistance muffler is divided into a first chamber, a second chamber, a third chamber and a fourth chamber via two main baffle plates and a gas outlet inner baffle plate; a main conduction pipe is coaxially arranged in the first chamber, the second chamber and the third chamber; one end of an air intake tube is arranged in the main conduction pipe in the first chamber and the second chamber while the another end is protruded outside; one end of an exhaust pipe is arranged in the fourth chamber and the another end is protruded outside; and the fourth chamber is filled by glass fiber muffling materials. The light truck adopting the resistance muffler can reduce external acceleration noise by 0.5dB and reduce exhaust back pressure by 2.4kPa, thereby effectively reducing the noise pollution of the whole truck, improving the driving convenience of the truck and improving the economic benefits of fuels.

Description

Light truck resistance silencing apparatus

Technical field

The utility model relates to automotive muffler.

Background technique

Silencing apparatus is to eliminate engine exhaust noise, to reduce the important component part of car load noise emitted by accelerating motor vehicle and operator cabin room noise, whether the silencing apparatus coupling rationally is directly connected to the ride comfort of car load and the power character and the Economy of car load, its function and design principle mainly contain: A, elimination engine exhaust noise, reduce car load acceleration noise and room noise; B, make motor be under the suitable exhaust back pressure work.

Present domestic light truck silencing apparatus mainly is a reactive muffler, only be fit to eliminate the exhaust low-frequency noise, height, intermediate frequency exhaust sound for present high speed engine generation, the noise elimination effect is relatively poor, cause car load noise emitted by accelerating motor vehicle, operator cabin room noise to increase, reduce the ride comfort of car load.Domestic light card silencing apparatus has five chambers at present, and effect is respectively eliminates the noise and smooth air-flow, and exhaust back pressure is bigger, reduce exhaust back pressure and must increase muffler volume.

Summary of the invention

In order to solve height, the relatively poor problem of intermediate frequency exhaust sound noise elimination effect that existing light truck silencing apparatus produces motor, the utility model provides a kind of light truck resistance silencing apparatus.

The technological scheme that realizes above-mentioned purpose is as follows:

Light truck comprises cylindrical shell with the resistance silencing apparatus, is divided into first chamber, second chamber, the 3rd chamber and 4 chambers of the 4th chamber by the two main dividing plates and the internal partition of giving vent to anger in the cylindrical shell; Coaxial first chamber, second chamber and the 3rd chamber of being positioned at of major flow duct; One end of suction tude is positioned at the major flow duct of first chamber, second chamber, and the other end is overhanging; One end of steam outlet pipe is positioned at the 4th chamber, and the other end is overhanging;

The axial length of described the 3rd chamber is the 250-270 millimeter, and the length that major flow duct stretches in the 3rd chamber is the 110-120 millimeter;

Fill full muffler material in described the 4th chamber, the length that steam outlet pipe stretches in the 4th chamber is the 150-170 millimeter.

The muffler material of filling in described the 4th chamber is a glass fibre.

The utility model utilizes resistance part first chamber, second chamber and the 3rd chamber of resistance silencing apparatus front end to eliminate low, the mid-frequency noise of exhaust; Utilize resistive part the 4th chamber of resistance to eliminate the middle and high audio-frequency noise of exhaust, therefore, the utility model has wide band noise reduction.The utility model has strengthened the 3rd cavity volume, has reduced the exhaust back pressure of exhaust system.

After light truck used the utility model resistance silencing apparatus, the car load noise emitted by accelerating motor vehicle reduced 0.5dB, and exhaust back pressure reduces 2.4kPa, effectively reduces the noise pollution of car load to environment, improved car load ride comfort and fuel economy.

Description of drawings

Fig. 1 is the utility model structural representation.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Embodiment:

Referring to Fig. 1, light truck comprises cylindrical shell 10 with the resistance silencing apparatus, is divided into first chamber 2, second chamber 4, the 3rd chamber 6 and the 4th chamber 8 by the two main dividing plates 3 and the internal partition 7 of giving vent to anger in the cylindrical shell 10; The major flow duct 5 coaxial axial lengths that are positioned at first chamber 2, second chamber 4 and the 3rd chamber 6, the three chambers 6 are 250 millimeters, and the length that major flow duct 5 stretches in the 3rd chamber 6 is 110 millimeters;

One end of suction tude 1 is positioned at the major flow duct 5 of first chamber 2, second chamber 4, and the other end is overhanging;

Fill full muffler material in the 4th chamber 8, muffler material is a glass fibre; One end of steam outlet pipe 9 is positioned at the 4th chamber 8, and the length that steam outlet pipe 9 stretches in the 4th chamber is 150 millimeters, and the other end is overhanging.

Embodiment 2:

The axial length of the 3rd chamber 6 is 270 millimeters, and the length that major flow duct 5 stretches in the 3rd chamber 6 is 120 millimeters;

The length that steam outlet pipe 9 stretches in the 4th chamber 8 is 170 millimeters.

Other is with embodiment 1.

Claims

1, light truck resistance silencing apparatus comprises cylindrical shell, is divided into first chamber, second chamber, the 3rd chamber and 4 chambers of the 4th chamber by the two main dividing plates and the internal partition of giving vent to anger in the cylindrical shell; Coaxial first chamber, second chamber and the 3rd chamber of being positioned at of major flow duct; One end of suction tude is positioned at the major flow duct of first chamber, second chamber, and the other end is overhanging; One end of steam outlet pipe is positioned at the 4th chamber, and the other end is overhanging, it is characterized in that:

2, light truck according to claim 1 resistance silencing apparatus is characterized in that: the muffler material of filling in described the 4th chamber is a glass fibre.