CN200978702Y

CN200978702Y - Exhaust silencer of automobile

Info

Publication number: CN200978702Y
Application number: CN 200620157793
Authority: CN
Inventors: 侯建章; 朱敏杰; 李歧
Original assignee: Pan Asia Technical Automotive Center Co Ltd; Shanghai General Motors Co Ltd
Current assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Priority date: 2006-11-16
Filing date: 2006-11-16
Publication date: 2007-11-21
Anticipated expiration: 2016-11-16

Abstract

The utility model discloses a car exhaust muffler comprising a shell, a dead room in the shell, a first gas cell and a gas cell beside the dead room, an intake pipe, an exhaust pipe and a relief mechanism, the dead room is separated out by a first clapboard and a second clapboard with through holes on them, and venting acoustical materials are provided between the two clapboards. Two ends of the intake pipe are respectively arranged out the shell and in the second gas cell, two ends of the exhaust pipe are respectively arranged in the first gas cell and out the shell, and two ends of the relief mechanism are respectively arranged in the first gas cell and in the second gas cell. The relief mechanism is closed when the car is on normal moving, and the car has an ideal exhaust noise performance, the relief mechanism is open with the function of exhausting and pressure relief, and the car has an ideal acceleration performance.

Description

Automobile exhaust muffler

Technical field

The utility model relates to a kind of automobile exhaust muffler, particularly a kind of car exhaust silencer.

Background technique

Usually, though conventional exhaust silencer structure has nothing in common with each other the acoustic wave filter structure of being made up of suction tude, steam outlet pipe, intermediate clapboard and inner filling sucting sound material mostly.

But, for the muffler design of the muffler design of automobile, particularly car, because the restriction of arranging often can not reach enough big silencing apparatus volume.As reaching desirable exhaust sound performance, often vehicle can not obtain desirable acceleration; As obtaining desirable vehicle accelerating ability, be cost to sacrifice desirable exhaust sound performance again often.How to find a kind of can obtain desirable exhaust sound performance can obtain again desirable vehicle accelerating ability can exhaust silencer, be that many automobile factorys commercial city faces and needs the problem that solves.

Therefore, be necessary to design a kind of new automobile exhaust muffler in fact, to address the above problem.

The model utility content

The purpose of this utility model be to provide a kind of can be when the air pressure in the silencing apparatus air chamber surpasses predetermined value to the exhaust silencer of its quick pressure releasing and exhausting air.

To achieve these goals, exhaust silencer of the present utility model is design like this:

A kind of automobile exhaust muffler, it comprises the anechoic room of shell, enclosure, first air chamber and second air chamber, suction tude, steam outlet pipe and the decompression mechanism of anechoic room both sides, described anechoic room is divided into by first dividing plate and second partition with through hole, be placed with ventilative sound absorbing material between the two, described suction tude two ends are located at the described shell outside and second air chamber respectively, described steam outlet pipe two ends are located at first air chamber and the described shell outside respectively, and described decompression mechanism two ends are located at first air chamber and second air chamber respectively.

Preferably, described decompression mechanism comprises a bypass tube that passes described first dividing plate and second partition, and described bypass tube is provided with automatic valve body at an end adjacent with the inlet of steam outlet pipe.

Preferably, described automatic valve body comprises a valve and a torsion spring that is located in the rotating shaft.Alternatively, described automatic valve body can comprise a baroceptor and the electronic switch valve body that is connected with this baroceptor.

Preferably, the tube wall of described suction tude and steam outlet pipe all offers pore.

Automobile is not enough to start decompression mechanism because the engine back pressure in the silencing apparatus hangs down when cruising, this moment, vehicle can obtain desirable exhaust sound performance; When automobile suddenly quickened, the engine back pressure in the silencing apparatus increased, and decompression mechanism starts discharges gas the acceleration performance that the vehicle acquisition is desirable immediately.This exhaust silencer that has a decompression mechanism effectively balance vehicle exhaust noise and vehicle accelerating ability can relation, and simple in structure, cheap, easy to implement.

Description of drawings

Below, will be described in more detail embodiment of the present utility model in conjunction with the accompanying drawings, wherein:

Fig. 1 shows the side structure schematic representation according to an embodiment's of the present utility model automobile exhaust muffler;

Fig. 2 shows according to the schematic cross sectional views along the A-A line of the present utility model;

Fig. 3 shows the structural representation of the exhaust by-pass valve among Fig. 1.

Embodiment

As depicted in figs. 1 and 2, this exhaust silencer 1 comprise shell 10, anechoic room 11, first air chamber 12, second air chamber 13, from described shell 10 outside suction tude 14 and steam outlet pipe 15 and the decompression mechanisms 16 that insert.

The space that described shell 10 is surrounded is roughly the elliptical cylinder-shape structure of hollow, and it comprises inlet end 102 and outlet side 104, and its inside is separated into 3 chambers.

Wherein, described anechoic room 11 is formed at interval by first dividing plate 110 with a plurality of corresponding through holes and second partition 112, is equipped with ventilative sound absorbing material 114, for example glass fibre sound absorbing material between this first dividing plate 110 and the second partition 112.These anechoic room 11 both sides are respectively first air chamber 12 and second air chamber 13.

As shown in Figure 1, described suction tude 14 surfaces have a plurality of pores, and its side perforation outside the inlet end 102 of described shell 10 enters first air chamber 12, described first dividing plate 110 and described second partition 114 successively, and its other end is exposed to second air chamber 13 then; Described steam outlet pipe 12 surfaces also have a plurality of pores, and its outlet side 104 outer surfaces perforation from described shell 10 enters second air chamber 13, described second partition 112 and described second partition 110 successively, and its other end is exposed to first air chamber 12 then.

See also Fig. 3, described decompression mechanism 16 comprises that a surperficial imperforate bypass tube 160 that passes first dividing plate 110 and second partition 112 is arranged on the automatic valve body 162 of this bypass tube 160 near first air chamber, 12 1 ends with this, and described automatic valve body 162 comprises valve 162a and the torsion spring 162b that is located in the rotating shaft.Under the resilient force of torsion spring 162b, this valve 162a is in normal closed condition, but is increased to when being enough to overcome the elastic force of torsion spring 162b when engine back pressure, and valve 162a is in opening state, thereby realizes pressure release and exhaust.Those skilled in the art will appreciate that described automatic valve body 162 also can other similar structure, for example comprise a baroceptor and the electronic switch valve body that is connected with this baroceptor.

In actual use, when automobile when normal row is executed, at first, automobile institute exhaust body enters shell 10 inside from suction tude 14, a part gas directly enter second air chamber 13, this part gas in second air chamber, obtain the buffering after through entering first air chamber 12 behind the anechoic room 11; A part of in addition gas enters first air chamber 12 from the pore of described suction tude 14 tube walls through behind the anechoic room 11;

Then, above-mentioned gas is rejected to the external world by described steam outlet pipe 15, and at this moment, the engine back pressure in the automobile exhaust muffler 1 is low to be not enough to overcome the spring force that torsion spring 162b produces, and valve 162a is in closed condition.

Under the anxious situation about quickening of automobile, the air-flow that enters into second air chamber 13 increases severely, cause the very fast rising of air pressure, make gas not pass through anechoic room 11 at once, make exhaust have some setbacks, influence automobile power, but, at this moment being increased to when being enough to overcome the spring force that torsion spring 162b produces when the engine back pressure in the automobile exhaust muffler 1, valve 162a opens, make institute's exhaust body to enter in first air chamber 13, discharge by steam outlet pipe 15 again by bypass tube 160.

The utility model effectively balance vehicle exhaust noise and vehicle accelerating ability can relation, and simple in structure, cheap, easy to implement.

Claims

1. automobile exhaust muffler, it is characterized in that, it comprises the anechoic room of shell, enclosure, first air chamber and second air chamber, suction tude, steam outlet pipe and the decompression mechanism of anechoic room both sides, described anechoic room is divided into by first dividing plate and second partition with through hole, be placed with ventilative sound absorbing material between the two, described suction tude two ends are located at the described shell outside and second air chamber respectively, described steam outlet pipe two ends are located at first air chamber and the described shell outside respectively, and described decompression mechanism two ends are located at first air chamber and second air chamber respectively.

2. automobile exhaust muffler according to claim 1 is characterized in that, described decompression mechanism comprises a bypass tube that passes described first dividing plate and second partition, and described bypass tube is provided with automatic valve body at an end adjacent with the inlet of steam outlet pipe.

3. automobile exhaust muffler according to claim 2 is characterized in that, described automatic valve body comprises a valve and a torsion spring that is located in the rotating shaft.

4. automobile exhaust muffler according to claim 2 is characterized in that, described automatic valve body comprises a baroceptor and the electronic switch valve body that is connected with this baroceptor.

5. according to any one described automobile exhaust muffler among the claim 1-4, it is characterized in that the tube wall of described suction tude and steam outlet pipe all offers pore.