CN202732063U - Two-stage muffler exhausting system for car - Google Patents
Two-stage muffler exhausting system for car Download PDFInfo
- Publication number
- CN202732063U CN202732063U CN 201220470722 CN201220470722U CN202732063U CN 202732063 U CN202732063 U CN 202732063U CN 201220470722 CN201220470722 CN 201220470722 CN 201220470722 U CN201220470722 U CN 201220470722U CN 202732063 U CN202732063 U CN 202732063U
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- China
- Prior art keywords
- chamber
- hush tube
- rear class
- silencing apparatus
- stage
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- Expired - Fee Related
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- Exhaust Silencers (AREA)
Abstract
The utility model provides a two-stage muffler exhausting system for a car. The two-stage muffler exhausting system consists of a pre-stage muffler assembly and a post-stage muffler assembly, wherein the pre-stage muffler assembly is composed of an air inlet pipe, a pre-stage muffler and an exhaust pipe, which are connected in sequence; the post-stage muffler assembly is composed of a post-stage air inlet pipe, a post-stage muffler and a tail pipe, which are connected in sequence; the exhaust pipe of the pre-stage muffler assembly is connected with the post-stage air inlet pipe of the post-stage muffler assembly; the pre-stage muffler has a three-cavity resistant structure; the inner cavity of the post-stage muffler is divided into a first cavity, a second cavity and a third cavity by a radial spacer; the cavities of the post-stage muffler are communicated with each other through a multi-hole combination on the spacer, and middle and rear muffler pipes; and the two-stage muffler exhausting system has a resistant and resistive composite structure. The two-stage muffler exhausting system for a car provided by the utility model has the advantages of large insertion loss and good low-frequency muffling effect.
Description
Technical field
The utility model relates to auto parts and components, specifically a kind of car two-stage exhaust silencer system.
Background technique
The effect of automotive silencing vent systems is to reduce exhaust sound; The present car secondary exhaust silencer system of usually using the prime muffler assembly to be combined with the rear class muffler assembly, prime muffler assembly be resistive structure or resistance structure, high frequency or Middle and low frequency noise mainly fall; The rear class silencing apparatus is multi-cavity structure, combination for resistance structure and high-frequency tube structure, can reduce Middle and low frequency noise, can reduce high-frequency noise again, the structure of this secondary exhaust silencer system is the mode that must adopt in order to satisfy GB1495-2002 automobile noise standard limit.
Each producer adopts different design proposals for the automobile noise standard limit, different also different for the noise reduction sound-deadening effect in view of cost and process program.
Summary of the invention
In order to improve the erasure effect of silencing exhaust system of car, and reduce the exhaust back pressure of system, specially propose a kind of car two-stage exhaust silencer system.
The technical solution of the utility model is for this reason: a kind of car two-stage exhaust silencer system, comprise that prime silencing apparatus and rear class silencing apparatus are combined into one, the prime silencing apparatus is by the pre-stage air inlet pipe, premuffler, outlet pipe connects formation successively, the rear class silencing apparatus is by forward flange, the rear class suction tude, the rear class silencing apparatus, tail pipe connects formation successively, the outlet pipe of prime silencing apparatus connects the rear class suction tude of rear class silencing apparatus, it is characterized in that: described premuffler is resistance structure, inner chamber is three chambers, be divided into front hush tube, middle hush tube and rear hush tube, wherein the rearward end of pre-stage air inlet pipe is inserted in the front hush tube and connects to middle hush tube, rear hush tube is connected outlet pipe, and outlet pipe connects to middle hush tube; Be laid with a plurality of apertures on the axle journal in the pre-stage air inlet Guan Zaiqian hush tube, be laid with a plurality of apertures on the axle journal behind the outlet pipe in the hush tube.
Improvement to such scheme is: the inner chamber of rear class silencing apparatus is divided into first chamber, second chamber, the 3rd chamber by the twice dividing plate; Have a plurality of combination apertures on the front dividing plate, form the exhaust passage; In the rear class silencing apparatus, and the hush tube end that the rear class suction tude is joined extends to second chamber end always, and shuts with blanking cover, and hush tube is positioned on the axle journal of first chamber and second chamber and is distributed with a plurality of apertures; The middle hush tube of rear class silencing apparatus connects first, second and third chamber, and middle hush tube is distributed with aperture in the part of the second chamber, and hush tube, rear hush tube have formed three pipe labyrinth silencer structures together; Rear hush tube connects first, second and third chamber, and the outer cover that is distributed with a plurality of apertures, orifice region on the hush tube has fiber glass coating and high-frequency tube; First chamber, second chamber, the 3rd chamber form resistance structure, are resistive structures in second chamber, the 3rd chamber, jointly form the composite sound damping structure.
Beneficial effect:
This car two-stage exhaust silencer system, in the prime silencing apparatus, in the rear class silencing apparatus, be provided with resistive composite sound damping structure of being combined with resistance, insertion loss is large, the insertion loss of every speed point is all greater than 32dB(A under the full load), maximum reaches 41dB(A), have good muffling effect, exhaust back pressure is low, power loss is little characteristics, especially to the obvious processing effect of low frequency.
Air-flow also flows out from these apertures except flowing in three pipelines in the rear class muffler assembly.Air-flow is constantly exchange on the aperture of three pipelines, and a part of acoustic energy is suppressed firmly, thereby reaches the effect of noise reduction.
Description of drawings
Fig. 1 the utility model car two-stage exhaust silencer system assembly schematic representation.
Fig. 2 is the enlarged diagram of the utility model premuffler.
Fig. 3 is the left view of the utility model rear class muffler assembly.
Fig. 4 is the enlarged diagram of rear class silencing apparatus in the utility model rear class muffler assembly.
Fig. 5 be among Fig. 4 10 A-A to sectional view.
1 is forward flange among the figure, 2 pre-stage air inlet pipes, 3 front hooks, the 4th, prime silencing apparatus, the 5th, outlet pipe, 6 rear flanges, the 7th, connecting bolt, the 8th, rear class forward flange, the 9th, rear class suction tude, the 10th, rear class silencing apparatus, 11 tail pipes, the 12nd, rear class tail pipe hook, the 13rd, link up with on the rear class, the 14th, rear class lower draw-bar, the 14, the 15th, dividing plate, the 16th, hush tube, the 17th, middle hush tube, the 18th, rear hush tube, the 19th, high-frequency tube, the 20th, fiber glass coating, the 21st, blanking cover, the 22nd, horn mouth
Embodiment
A kind of car two-stage exhaust silencer system as shown in Figure 1 is comprised of prime silencing apparatus and rear muffler.The prime silencing apparatus is connected successively by forward flange 1, pre-stage air inlet pipe 2, front hook 3, prime silencing apparatus 4, outlet pipe 5, rear flange 6 and connecting bolt 7 and consists of; The rear class silencing apparatus is connected successively by hook 13 and rear class lower draw-bar 14 on rear class forward flange 8, rear class suction tude 9, rear class silencing apparatus 10, tail pipe 11, rear class tail pipe hook 12, the rear class and consists of; The outlet pipe 5 of prime muffler assembly and the suction tude of rear class muffler assembly 9 connect by rear flange 6, rear class front 8, and rear muffler is provided with the rear class tail pipe hook 12 that is connected with the chassis, links up with 13 on the rear class, rear class lower draw-bar 14.
As shown in Figure 2, described premuffler 4 is resistance structure, inner chamber is three chambers, be divided into front hush tube, middle hush tube and rear hush tube, wherein the rearward end of pre-stage air inlet pipe 2 is inserted in the front hush tube 4 and connects to middle hush tube, rear hush tube is connected outlet pipe 5, and outlet pipe 5 connects to middle hush tube; The axle journal of pre-stage air inlet pipe 2 in front hush tube is laid with a plurality of apertures, is laid with a plurality of apertures on the axle journal in the outlet pipe 5 rear hush tubes.
As shown in Figure 3, the inner chamber of rear class silencing apparatus 10 is divided into first chamber, second chamber, the 3rd chamber by 14,15 twice dividing plates; Have a plurality of combination apertures on the dividing plate 14, form the exhaust passage.
In the rear class silencing apparatus 10, and hush tube 16 ends that rear class suction tude 9 is joined extend to second chamber end always, and shut with blanking cover 21, and hush tube 16 is positioned on the axle journal of first chamber and second chamber and is distributed with a plurality of apertures; The middle hush tube 17 of rear class silencing apparatus connects first, second and third chamber, has formed three pipe labyrinth silencer structures with hush tube 16 and rear hush tube 18; Rear hush tube 18 front ends that join with tail pipe extend in first chamber always, and are welded with a horn mouth 22 at front end.Rear hush tube 18 is positioned at the outer cover that is distributed with a plurality of apertures, orifice region on the axle journal of second and third chamber fiber glass coating 20 and high-frequency tube 19.
First chamber, second chamber, the 3rd chamber form resistance structure, are resistive structures in second chamber, the 3rd chamber, jointly form the composite sound damping structure.
Performance index of the present utility model are as follows:
1., air leakage: under the 30kPa condition, premuffler assembly≤5L/min, rear muffler assembly≤10L/min.
2., back pressure :≤220mbar@5600rpm, measuring point be at the catalyst converter front end, i.e. the vent systems back pressure.Cold junction (not containing catalyst converter) back pressure≤200mbar@5600rpm, measuring point is at the premuffler front end.
3., insertion loss: under the full load every speed greater than 32dB(A).
4., car accelerates Running noise outward: (test method is pressed GB1495-2002)≤74dB(A).
Claims (2)
1. car two-stage exhaust silencer system, comprise that prime silencing apparatus and rear class silencing apparatus are combined into one, the prime silencing apparatus is by the pre-stage air inlet pipe, premuffler, outlet pipe connects formation successively, the rear class silencing apparatus is by forward flange, the rear class suction tude, the rear class silencing apparatus, tail pipe connects formation successively, the outlet pipe of prime silencing apparatus connects the rear class suction tude of rear class muffler assembly, it is characterized in that: described premuffler is resistance structure, inner chamber is three chambers, be divided into front hush tube, middle hush tube and rear hush tube, wherein the rearward end of pre-stage air inlet pipe is inserted in the front hush tube and connects to middle hush tube, rear hush tube is connected outlet pipe, and outlet pipe connects to middle hush tube; Be laid with a plurality of apertures on the axle journal in the pre-stage air inlet Guan Zaiqian hush tube, be laid with a plurality of apertures on the axle journal behind the outlet pipe in the hush tube.
2. a kind of car two-stage exhaust silencer system according to claim 1, it is characterized in that: the inner chamber of rear class silencing apparatus is divided into first chamber, second chamber, the 3rd chamber by the twice dividing plate; Have a plurality of combination apertures on the front dividing plate, form the exhaust passage; In the rear class silencing apparatus, and the hush tube end that the rear class suction tude is joined extends to second chamber end always, and is provided with and shuts blanking cover, and hush tube is positioned on the axle journal of first chamber and second chamber and is distributed with a plurality of apertures; The middle hush tube of rear class silencing apparatus connects first, second and third chamber, and middle hush tube is distributed with aperture in the part of the second chamber, and hush tube, rear hush tube have formed three pipe labyrinth silencer structures together; Rear hush tube connects first, second and third chamber, and the outer cover that is distributed with a plurality of apertures, orifice region on the hush tube has fiber glass coating and high-frequency tube; First chamber, second chamber, the 3rd chamber form resistance structure, are resistive structures in second chamber, the 3rd chamber, jointly form the composite sound damping structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220470722 CN202732063U (en) | 2012-09-17 | 2012-09-17 | Two-stage muffler exhausting system for car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220470722 CN202732063U (en) | 2012-09-17 | 2012-09-17 | Two-stage muffler exhausting system for car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202732063U true CN202732063U (en) | 2013-02-13 |
Family
ID=47657774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220470722 Expired - Fee Related CN202732063U (en) | 2012-09-17 | 2012-09-17 | Two-stage muffler exhausting system for car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202732063U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343517A (en) * | 2014-06-18 | 2015-02-11 | 南京海特汽车部件有限公司 | Automobile muffler assembly |
| CN113374568A (en) * | 2021-07-19 | 2021-09-10 | 无锡威孚力达催化净化器有限责任公司 | Air inlet connecting structure of rear-stage silencer |
-
2012
- 2012-09-17 CN CN 201220470722 patent/CN202732063U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343517A (en) * | 2014-06-18 | 2015-02-11 | 南京海特汽车部件有限公司 | Automobile muffler assembly |
| CN113374568A (en) * | 2021-07-19 | 2021-09-10 | 无锡威孚力达催化净化器有限责任公司 | Air inlet connecting structure of rear-stage silencer |
| CN113374568B (en) * | 2021-07-19 | 2024-03-26 | 无锡威孚力达催化净化器有限责任公司 | Air inlet connection structure of rear-stage muffler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20140917 |
|
| EXPY | Termination of patent right or utility model |