CN201090275Y - Engine exhaust system - Google Patents
Engine exhaust system Download PDFInfo
- Publication number
- CN201090275Y CN201090275Y CNU2007200457065U CN200720045706U CN201090275Y CN 201090275 Y CN201090275 Y CN 201090275Y CN U2007200457065 U CNU2007200457065 U CN U2007200457065U CN 200720045706 U CN200720045706 U CN 200720045706U CN 201090275 Y CN201090275 Y CN 201090275Y
- Authority
- CN
- China
- Prior art keywords
- outlet pipe
- current stabilization
- exhaust system
- stabilization chamber
- muffler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000006641 stabilisation Effects 0.000 claims description 37
- 238000011105 stabilization Methods 0.000 claims description 37
- 230000030279 gene silencing Effects 0.000 claims description 25
- 239000003381 stabilizer Substances 0.000 claims description 6
- 230000003584 silencer Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
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- Exhaust Silencers (AREA)
Abstract
The utility model discloses an exhaust system for an automobile engine, comprising an exhaust tube and a muffler. The exhaust tube is arranged at the front end of the muffler; a steady flow device arranged on the exhaust tube is a steady flow cavity which changes the direction of the air current inside the exhaust tube. Compared with the prior art, the utility model adds a quick exhaust air current device of a steady flow engine to the pipeline of the exhaust system, that is, the steady flow cavity; the steady flow cavity is arranged at the front part of the muffler in the exhaust system and stabilizes the pulsing high-speed air current exhausted when the engine runs with high speed; the stabilized high-speed air current can stably flow into the muffler so that the friction noise generated by the rubbing of the pulsing air current on the internal wall of the exhausting pipeline and on the muffler can be avoided.
Description
Technical field
The utility model relates to a kind of automobile engine exhaust system.
Background technique
At present, one of major function of automobile engine exhaust system is to reduce engine exhaust noise.The formation of exhaust sound mainly contains two sources, is the noise that engine combustion causes on the one hand; Be the fricative frictional noises of inwall such as exhaust airstream and exhaust duct, silencing apparatus on the other hand.Under the time of engine low speed state, the tailpipe noise is mainly caused by engine combustion.And high engine speeds when running, the tailpipe noise mainly is the fricative frictional noises of inwall such as air-flow and exhaust duct, silencing apparatus.During the high engine speeds running, the common practices that reduces the vent systems frictional noise is the volume that increases silencing apparatus, but can cause following problem: 1, the inner silencer element complex structure of silencing apparatus; 2, increasing volume makes silencing apparatus be difficult to be implemented in the layout on the car load; 3, increasing volume makes muffler back pressure increase a lot.
The model utility content
Technical problem to be solved in the utility model is, when high engine speeds turns round, when reducing the vent systems frictional noise, the inner silencer element complex structure of silencing apparatus, be difficult to be implemented in technical problems such as layout on the car load and muffler back pressure increase, and a kind of automobile engine exhaust system is provided.
Technological scheme provided by the utility model is, a kind of automobile engine exhaust system comprises outlet pipe and silencing apparatus, and described outlet pipe is arranged in described silencing apparatus front end, and described outlet pipe is provided with constant-current stabilizer.
Described constant-current stabilizer is a current stabilization chamber, and described current stabilization chamber changes the direction of the air-flow in the described outlet pipe.
Described current stabilization chamber makes the interior airflow direction of described outlet pipe earlier to the directional divergence away from described outlet pipe center line, then at the directional divergence to close described outlet pipe center line.
The cross sectional area in described current stabilization chamber is greater than the area of described outlet pipe cross section.
Described current stabilization chamber is arranged in the front end of described outlet pipe.
Adopt technological scheme provided by the utility model, can effectively solve when high engine speeds turns round, when reducing the vent systems frictional noise, the inner silencer element complex structure of silencing apparatus, be difficult to be implemented in technical problems such as layout on the car load and muffler back pressure increase, can reduce the vent systems frictional noise well; Simultaneously, also have simple in structure, characteristics such as manufacturing process is simple, cost is low, long service life.
Description of drawings
In conjunction with the accompanying drawings, the utility model is further described:
Fig. 1 is the schematic representation that flows to of air-flow in the prior art outlet pipe;
Fig. 2 is the schematic representation that flows to of air-flow in the utility model outlet pipe;
Fig. 3 is a scheme of installation of the present utility model;
Wherein, 1 is the current stabilization chamber; 2 is silencing apparatus; 3 is outlet pipe.
Embodiment
Shown in Fig. 2-3, a kind of automobile engine exhaust system comprises outlet pipe 3 and silencing apparatus 2, and described outlet pipe 3 is arranged in described silencing apparatus 2 front ends, and described outlet pipe 3 is provided with constant-current stabilizer.Silencing apparatus 2 front ends are meant the end near engine body, and promptly outlet pipe 3 is arranged between silencing apparatus 2 and the motor.
Described constant-current stabilizer is a current stabilization chamber 1, and described current stabilization chamber 1 changes the direction of the air-flow in the described outlet pipe 3; Described current stabilization chamber 1 makes the airflow direction in the described outlet pipe 3 first to the directional divergence away from described outlet pipe 3 center lines, then at the directional divergence to close described outlet pipe 3 center lines; The cross sectional area in described current stabilization chamber 1 is greater than the area of described outlet pipe 3 cross sections, the cross-sectional diameter in described current stabilization chamber 1 is greater than the diameter of described outlet pipe 3 cross sections, specifically, the cross-sectional diameter in described current stabilization chamber 1 is than the big 5%-30% of diameter of described outlet pipe 3 cross sections, preferably big 15%-20%; The pulse high velocity air of discharging when the 1 pair of high engine speeds in described current stabilization chamber turns round carries out current stabilization, high velocity air behind the current stabilization just can flow into silencing apparatus 2 more reposefully, thereby has avoided pulse pneumatic to fricative frictional noises of inwall such as outlet pipe 3 roads, silencing apparatuss 2.
Described current stabilization chamber 1 is arranged in the front end of described outlet pipe 3; The front end of outlet pipe 3 is meant the end near motor, and promptly the position of current stabilization chamber 1 layout is the most severe position of airstream vibration in the outlet pipe 3, because air-flow just comes out from motor, changes outlet pipe 3 over to, and is therefore also the most severe in the vibration of this position.
Compared with prior art, the utility model installs a kind of current stabilization high engine speeds exhaust airstream device additional on the vent systems pipeline, and both the current stabilization chamber 1.Current stabilization chamber 1 is arranged in silencing apparatus 2 front portions in vent systems, the pulse high velocity air of discharging when the 1 pair of high engine speeds in current stabilization chamber turns round carries out current stabilization, high velocity air behind the current stabilization just can flow into silencing apparatus 2 more reposefully, thereby has avoided pulse pneumatic to fricative frictional noises of inwall such as outlet pipe 3 roads, silencing apparatuss 2.
Add current stabilization chamber 1 front engine exhaust airstream mobile in outlet pipe 3 and be a kind of with to get angry the pulsing airflow of frequency dependence, such air-flow not steady, will be to outlet pipe 3 roads, a kind of pulsation friction of silencing apparatus 2 internal partition effects, so vent systems can produce very big frictional noise when engine speed is very big.After adding current stabilization chamber 1, current stabilization chamber 1 forms this pulse pneumatic mixing stably, and air-flow flows out from steam outlet pipe, the frictional noise of air-flow and outlet pipe 3 roads, silencing apparatus 2 internal partitions is relatively low stably, and high engine speeds when running, the frictional noise of exhaust airstream is the main component of exhaust sound, so this current stabilization effect of buffer cavity has effectively reduced the overall noise of vent systems when the motor commentaries on classics runs up.
During the high engine speeds running, the high speed pulse pneumatic of discharge flows into current stabilization chamber 1 along outlet pipe 3, flows out along outlet pipe 3 behind the 1 body current stabilization of current stabilization chamber.High velocity air behind 1 current stabilization of current stabilization chamber can steadily flow into silencing apparatus 2, thereby has reduced the fricative frictional noises of inwall such as high velocity air and outlet pipe 3 roads, silencing apparatus 2.
Claims (5)
1. an automobile engine exhaust system comprises outlet pipe (3) and silencing apparatus (2), and described outlet pipe (3) is arranged in described silencing apparatus (2) front end, it is characterized in that, described outlet pipe (3) is provided with constant-current stabilizer.
2. a kind of automobile engine exhaust system as claimed in claim 1 is characterized in that, described constant-current stabilizer is a current stabilization chamber (1), and described current stabilization chamber (1) changes the direction of the air-flow in the described outlet pipe (3).
3. a kind of automobile engine exhaust system as claimed in claim 2, it is characterized in that, described current stabilization chamber (1) makes the interior airflow direction of described outlet pipe (3) earlier to the directional divergence away from described outlet pipe (3) center line, then at the directional divergence to close described outlet pipe (3) center line.
4. as claim 2 or 3 described a kind of automobile engine exhaust systems, it is characterized in that the cross sectional area in described current stabilization chamber (1) is greater than the area of described outlet pipe (3) cross section.
5. a kind of automobile engine exhaust system as claimed in claim 4 is characterized in that, described current stabilization chamber (1) is arranged in the front end of described outlet pipe (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200457065U CN201090275Y (en) | 2007-08-28 | 2007-08-28 | Engine exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200457065U CN201090275Y (en) | 2007-08-28 | 2007-08-28 | Engine exhaust system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201090275Y true CN201090275Y (en) | 2008-07-23 |
Family
ID=39862035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200457065U Expired - Fee Related CN201090275Y (en) | 2007-08-28 | 2007-08-28 | Engine exhaust system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201090275Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011634A (en) * | 2010-12-12 | 2011-04-13 | 昆明理工大学 | Three-stage symmetrical muffling exhaust pipe |
| CN102011636A (en) * | 2010-12-12 | 2011-04-13 | 昆明理工大学 | Two-stage noise reduction exhaust pipe |
| CN102128675A (en) * | 2010-12-21 | 2011-07-20 | 奇瑞汽车股份有限公司 | Method for acquiring radiation noise parameter and curve of automobile exhaust system |
| CN105971704A (en) * | 2016-07-21 | 2016-09-28 | 重庆长安汽车股份有限公司 | Dual-row automobile muffler transversely arranged on two sides |
-
2007
- 2007-08-28 CN CNU2007200457065U patent/CN201090275Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011634A (en) * | 2010-12-12 | 2011-04-13 | 昆明理工大学 | Three-stage symmetrical muffling exhaust pipe |
| CN102011636A (en) * | 2010-12-12 | 2011-04-13 | 昆明理工大学 | Two-stage noise reduction exhaust pipe |
| CN102128675A (en) * | 2010-12-21 | 2011-07-20 | 奇瑞汽车股份有限公司 | Method for acquiring radiation noise parameter and curve of automobile exhaust system |
| CN102128675B (en) * | 2010-12-21 | 2012-11-28 | 奇瑞汽车股份有限公司 | Method for acquiring radiation noise parameter and curve of automobile exhaust system |
| CN105971704A (en) * | 2016-07-21 | 2016-09-28 | 重庆长安汽车股份有限公司 | Dual-row automobile muffler transversely arranged on two sides |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080723 Termination date: 20120828 |