CN202165148U

CN202165148U - Silencing exhaust system of car

Info

Publication number: CN202165148U
Application number: CN2011202516971U
Authority: CN
Inventors: 张选国; 陈杰
Original assignee: HUBEI TONGDA CO Ltd
Current assignee: HUBEI TONGDA CO Ltd
Priority date: 2011-07-18
Filing date: 2011-07-18
Publication date: 2012-03-14
Anticipated expiration: 2021-07-18

Abstract

The utility model provides a silencing exhaust system of a car, which consists of a pre-stage silencer assembly and a post-stage silencer assembly, wherein the pre-stage silencer assembly is formed by sequentially connecting a gas inlet pipe, a pre-stage silencer and an exhaust pipe; the post-stage silencer assembly is formed by sequentially connecting a post-stage gas inlet pipe, a post-stage silencer and a tail pipe; the exhaust pipe of the pre-stage silencer is connected with the post-stage gas inlet pipe of the post-stage silencer assembly; (1) the pre-stage silencer has a single-chamber resistance structure; (2) an inner cavity of the post-stage silencer is divided into a first chamber, a second chamber and a third chamber by radial clapboards; all the chambers are combined with one another by a plurality of holes arranged on the clapboards and are communicated with one another by a middle and a rear muffler pipes; and the silencing exhaust system of the car is a composite structure with resistance property. The silencing exhaust system of the car is high in insertion loss and ideal in low-frequency silencing effect.

Description

A kind of car exhaust silencer system

Technical field

The utility model relates to a kind of car exhaust silencer system.

Background technique

The effect of automotive silencing vent systems is to reduce exhaust sound.The present secondary exhaust silencer system that combines with back grade muffler assembly with the prime muffler assembly usually of car, prime muffler assembly be resistive structure or resistance structure, high frequency or medium and low frequency noise mainly fall; Back level silencing apparatus is a multi-cavity structure, and the combination for resistance structure and high-frequency tube structure can reduce the medium and low frequency noise; Can reduce high-frequency noise again; The application of catalyst converter helps environmental protection more, also has been widely used in car and has used, and reducing noise is the technology public relations project of car.The structure of this secondary exhaust silencer system is the mode that must adopt in order to satisfy GB1495-2002 automobile noise limit value standard.

Summary of the invention

In order to improve the erasure effect of car exhaust silencer system, and reduce the exhaust back pressure of system, the present invention proposes a kind of car exhaust silencer system.

The technological scheme of the utility model is: a kind of car exhaust silencer system; Comprise catalytic converter assembly, prime muffler assembly and back level muffler assembly; The prime muffler assembly comprises that forward flange, suction tude, premuffler, outlet pipe rear flange connect formation successively, and back level muffler assembly comprises that forward flange, back level suction tude, back level silencing apparatus, tail pipe connect formation successively, and the outlet pipe of prime muffler assembly connects the back level suction tude of back level muffler assembly; It is characterized in that: described premuffler is inner to be single cavity configuration; The end of suction tude is inserted in the premuffler, forms hush tube, and on the axle journal of hush tube, is distributed with a plurality of apertures; The rear end of the hush tube tracheae that runs in, premuffler forms the resistance structure body.

Improvement to such scheme is: the inner chamber of back level silencing apparatus is divided into first chamber, second chamber, the 3rd chamber by the twice dividing plate; All be provided with a plurality of combination apertures on the twice dividing plate, form the exhaust passage; The preceding hush tube end that in the back level silencing apparatus and back level suction tude is joined extends to second chamber end always, and is provided with blanking cover, and preceding hush tube is positioned on the axle journal of first chamber and second chamber and is distributed with a plurality of apertures; Be provided with middle hush tube and connect first, second and third chamber in the level silencing apparatus of back; Middle hush tube passes through one 180 ° bend pipe connection with the back hush tube and seals; The back hush tube front end that joins with tail pipe extends in first chamber always; Connect and sealing with 180 ° bend pipe, back hush tube is positioned at the outside that is distributed with a plurality of apertures, orifice region on the axle journal of second and third chamber and is with fiber glass coating and high-frequency tube; First chamber, second chamber, the 3rd chamber form resistance structure, in second chamber, the 3rd chamber resistive structure are arranged also, form compound noise elimination structure jointly.

Beneficial effect:

This car exhaust silencer system; In the prime silencing apparatus, in the back level silencing apparatus, be provided with the resistive compound noise elimination structure that combines with resistance; It is big to insert loss, and up 38dB (A) is lost all greater than 29dB (A) in the insertion of each rotating speed point under the full load; Have good muffling effect, exhaust back pressure is low, power loss is little characteristics, especially to the obvious processing effect of low frequency.

Description of drawings

Fig. 1 is the main TV structure schematic representation of the utility model.

Fig. 2 is the plan structure schematic representation of the utility model.

Fig. 3 is the assembling schematic representation of the prime muffler assembly B of the utility model.

Fig. 4 is the external structure schematic representation of level muffler assembly C behind the utility model.

Fig. 5 is the internal structure schematic representation of level muffler assembly C behind the utility model.

Embodiment

The utility model is like Fig. 1,2,3,4, shown in 5.

A kind of car exhaust silencer system comprises catalytic converter assembly A, prime muffler assembly B and back level muffler assembly C, and prime muffler assembly B is connected successively by forward flange 1, suction tude 2, premuffler 3, outlet pipe 4 and rear flange 5 and constitutes.

Back level muffler assembly C is connected successively by connecting bolt 6, back level forward flange 7, back level suction tude 8, back level front hook 9, back level silencing apparatus 10, back level aft hook 11 and tail pipe 12 and constitutes; The outlet pipe 4 of prime muffler assembly connects through face-flange 5,7 with the suction tude 8 of back level muffler assembly, and the rear muffler assembly is provided with the front and

back hook

9,11 that is connected with the chassis.

The inner chamber of prime muffler assembly B is a chamber, and the end of suction tude 2 is inserted in the premuffler 3, form hush tube, and on the axle journal of hush tube, be distributed with a plurality of apertures, and the rear end of the hush tube tracheae 4 that runs in, premuffler 3 forms the resistance structure body.

Described premuffler inside is single cavity configuration, and hush tube connects the inside of premuffler, and the middle part surface of hush tube is provided with a plurality of ф 8 holes and housing, end cap are formed the expanssion type silencing apparatus.

As shown in Figure 5, the inner chamber of back level silencing apparatus is divided into first chamber, second chamber, the 3rd chamber by the twice dividing plate; All have a plurality of combination apertures on the dividing plate, form the exhaust passage.

The inner chamber of back level silencing apparatus is divided into first chamber, second chamber, the 3rd chamber by 13,15 twice dividing plates; All have a plurality of combination apertures on the dividing

plate

13,15, form the exhaust passage.

Preceding hush tube 12 ends that in the back level silencing apparatus and back level suction tude 8 is joined extend to second chamber end always, and shut with blanking cover 16, and preceding hush tube 12 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 back level silencing apparatus connects first, second and third chambers, and hush tube 17 connects with 180 ° bend pipe 22 and seals in first chamber; Back hush tube 21 front ends that join with tail pipe extend in first chamber always; Connect and sealing with 180 ° bend pipe 22, back hush tube 21 is positioned at the outside that is distributed with a plurality of apertures, orifice region on the axle journal of second and third chamber and is with fiber glass coating 20 and high-frequency tube 19; First chamber, second chamber, the 3rd chamber form resistance structure, in second chamber, the 3rd chamber resistive structure are arranged also, form compound noise elimination structure jointly.

The performance index of the utility model are following:

1., air leakage: under the 30kPa condition, premuffler assembly≤5L/min, rear muffler assembly≤10L/min.

2., back pressure :≤350mbar6000rpm, measuring point is at the catalyst converter front end, i.e. the vent systems back pressure.Cold junction (not containing catalyst converter) back pressure≤200mbar6000rpm, measuring point is at the premuffler front end.

3., insert loss: under each rotating speed of full load greater than 29dB (A).

4., car quickens Running noise outward: (test method is pressed GB1495-2002)≤74dB (A).

Claims

1. car exhaust silencer system; Comprise catalytic converter assembly, prime muffler assembly and back level muffler assembly; The prime muffler assembly comprises that forward flange, suction tude, premuffler, outlet pipe rear flange connect formation successively, and back level muffler assembly comprises that forward flange, back level suction tude, back level silencing apparatus, tail pipe connect formation successively, and the outlet pipe of prime muffler assembly connects the back level suction tude of back level muffler assembly; It is characterized in that: described premuffler is inner to be single cavity configuration; The end of suction tude is inserted in the premuffler, forms hush tube, and on the axle journal of hush tube, is distributed with a plurality of apertures; The rear end of the hush tube tracheae that runs in, premuffler forms the resistance structure body.

2. a kind of car exhaust silencer system according to claim 1 is characterized in that: the inner chamber of back level silencing apparatus is divided into first chamber, second chamber, the 3rd chamber by the twice dividing plate; All be provided with a plurality of combination apertures on the twice dividing plate, form the exhaust passage; The preceding hush tube end that in the back level silencing apparatus and back level suction tude is joined extends to second chamber end always, and is provided with blanking cover, and preceding hush tube is positioned on the axle journal of first chamber and second chamber and is distributed with a plurality of apertures; Be provided with middle hush tube and connect first, second and third chamber in the level silencing apparatus of back; Middle hush tube passes through one 180 ° bend pipe connection with the back hush tube and seals; The back hush tube front end that joins with tail pipe extends in first chamber always; Connect and sealing with 180 ° bend pipe, back hush tube is positioned at the outside that is distributed with a plurality of apertures, orifice region on the axle journal of second and third chamber and is with fiber glass coating and high-frequency tube; First chamber, second chamber, the 3rd chamber form resistance structure, in second chamber, the 3rd chamber resistive structure are arranged also, form compound noise elimination structure jointly.