CN202441449U - Sedan air exhaust silencer in accordance with National V Emission Standard - Google Patents

Abstract

The utility model discloses a sedan air exhaust silencer in accordance with the National V Emission Standard. The sedan air exhaust silencer comprises a front pipe assembly, a middle silencer assembly, a rear pipe assembly and a rear silencer assembly which are connected in sequence. The front pipe assembly comprises an air inlet pipe assembly, a front air inlet pipe I, a catalyst assembly, a front air inlet pipe II and a middle silencing front flange, wherein the air inlet pipe assembly is directly connected with the front air inlet pipe I; the front air inlet pipe I is connected with the catalyst assembly and an air inlet II in sequence; the middle silencing front flange is mounted at an end part at one end of the air inlet pipe II, which is far from the catalyst assembly; and the end part at one end of the air inlet pipe II, which is far from the catalyst assembly, is connected with the middle silencer assembly through the middle silencing front flange. The catalyst assembly is additionally arranged on the front pipe assembly of the air exhaust silencer, so as to further purify and meet high requirements in the National V Emission Standard. Therefore, the air exhaust silencer additionally provided with the catalyst assembly has the advantages of compact and reasonable structure, and convenience in use.

Description

Exhaust mufflers for cars that meet the National V emission standards

technical field

The utility model relates to a car exhaust system, in particular to a car exhaust muffler that can meet the national five emission standards.

Background technique

     The National V standard is equivalent to the Euro V standard of the European Union. The European Union has implemented it since 2009, and its restrictions on motor vehicle emissions such as nitrogen oxides and hydrocarbons are more stringent. From National I to National IV, every time the standard is raised, the pollution of single vehicles will be reduced by 30% to 50%.

Gasoline and diesel using the new standard will reduce many pollutants, reduce PM2.5 emissions from National IV to National V, and further tighten environmental protection and other indicators. Among them, the sulfur content will be reduced from 50ppm to 10ppm, and the quality of oil products will also be further improved. The opinion draft also changed the number of motor gasoline from No. 90, No. 93, and No. 97 to No. 89, No. 92, and No. 95. the

The research results show that the quality upgrade of gasoline and diesel for vehicles has made a great contribution to emission reduction, and the replacement of gasoline and diesel for vehicles in the fifth stage will achieve at least 10% and 7% reduction in nitrogen oxide emissions. Hydrocarbons, carbon monoxide, nitrogen oxides, and particulate matter emissions will all be effectively controlled. After the implementation of the new standard, the sulfur content in the fuel is only one-fifth of the previous one, and the combustion will be more complete due to the improved quality of the oil. Therefore, the emission of PM2.5 in the exhaust gas can be directly reduced.

At present, the mainstream emission standard for domestic cars is the National IV standard, so the design of the car only needs to meet the National IV standard. Most cars only have a first-level purifier, and there is no second-level purifier on the exhaust muffler, so it cannot Meet the needs of the higher National V standards.

Utility model content

The utility model overcomes the deficiencies of the prior art, and provides a car exhaust muffler that meets the national five emission standards. The muffler adds a catalyst assembly to the front pipe assembly, and the catalyst assembly can further purify automobile emissions. The exhaust gas problem solves the technical problems existing in the prior art.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions:

A car exhaust muffler meeting the national five emission standards, comprising a front pipe assembly, a middle muffler assembly, a rear pipe assembly and a rear muffler assembly connected in sequence, the front pipe assembly includes an intake pipe assembly, a forward Air pipe 1, catalyst assembly, inlet air pipe 2, and the front flange of intermediate elimination, in which the inlet pipe assembly is directly connected to the inlet pipe 1, and the inlet pipe 1 is connected to the catalyst assembly and the inlet pipe 2 in turn, and the inlet pipe 2 is far away from the catalyst assembly. One end is equipped with a front flange of the middle elimination, and is connected with the middle muffler assembly through the front flange of the middle elimination.

Further technical solutions are:

The catalyst assembly includes a front cover, a liner, a catalyst, an outer shell and a rear end cover, wherein the catalyst and the liner are wrapped in the outer shell, and the front end cover and the rear end cover are respectively located at both ends of the outer shell , wherein the front end cover is connected with the first air intake pipe, and the rear end cover is connected with the second air intake pipe.

A corrugated pipe is sleeved at the junction of the intake pipe assembly and the front intake pipe.

The gasket is located between the catalyst and the casing.

The shape of the front end cover and the rear end cover is the same, both being trumpet-shaped.

The front pipe assembly is provided with a hook on the pipe wall close to the middle muffler assembly, and at the same time, the rear pipe assembly is also provided with a hook on the pipe wall near the middle muffler assembly.

The front pipe assembly, the middle muffler assembly, the rear pipe assembly and the rear muffler assembly are connected as one by welding.

Compared with the prior art, the beneficial effects of the utility model are:

1. A catalyst assembly is added to the front pipe assembly of the exhaust muffler to further purify and meet the high requirements of the National V emission standards.

2. The exhaust muffler with catalyst assembly is compact, reasonable and easy to use.

Description of drawings

Figure 1 is an assembly diagram of a car exhaust pipe applicable to the National IV standard;

Fig. 2 is a schematic diagram of the overall structure of the utility model;

Fig. 3 is a schematic diagram of the front pipe assembly of the present utility model;

Fig. 4 is a schematic diagram of the catalyst assembly of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further elaborated.

As shown in FIG. 2 , a car exhaust muffler meeting the National V emission standard includes a front pipe assembly 1 , a middle muffler assembly 2 , a rear pipe assembly 3 and a rear muffler assembly 4 connected in sequence. The front pipe assembly 1, the middle muffler assembly 2, the rear pipe assembly 3 and the rear muffler assembly 4 are connected as one by welding.

As shown in Figures 2 and 3, the front pipe assembly 1 includes an intake pipe assembly 11, a front air intake pipe one 12, a catalyst assembly 13, a front air intake pipe two 14 and a front flange 15 in the intermediate elimination, wherein the air intake pipe assembly 11 directly It is connected with the front air intake pipe one 12, and the front air intake pipe one 12 is connected with the catalyst assembly 13 and the air intake pipe two 14 in turn, and the end of the air intake pipe two 14 away from the catalyst assembly 13 is equipped with a middle elimination front flange 15, and passes through the middle The front flange 15 is connected with the middle muffler assembly 2. A bellows 16 is sleeved at the joint between the intake pipe assembly 11 and the front intake pipe one 12 .

As shown in Figure 4, the catalyst assembly 13 includes a front cover 13-1, a liner 13-3, a catalyst 13-4, a casing 13-2 and a rear end cover 13-5, wherein the catalyst 13-4 and liner The pad 13-3 is wrapped in the shell 13-2, and the front end cover 13-1 and the rear end cover 13-5 are respectively located at the two ends of the shell 13-2, wherein the front end cover 13-1 and the front air duct One 12 is connected, and the rear end cover 13-5 is then communicated with the front air duct two 14. The gasket 13-3 is located between the catalyst 13-4 and the casing 13-2. The front end cover 13-1 and the rear end cover 13-5 have the same shape and are trumpet-shaped.

Of course, we can also set the front pipe assembly 1 with a hook on the pipe wall close to the middle muffler assembly 2, and at the same time, the rear pipe assembly 3 is also provided with a hook on the pipe wall near the middle muffler assembly 2 .

Claims (7)

1. car exhaust silencer that satisfies state's five emission standards; Comprise the preceding pipe assembly (1), middle muffler assembly (2), back pipe assembly (3) and the rear muffler assembly (4) that connect successively; It is characterized in that: before described pipe assembly (1) comprise suction tude assembly (11), preceding suction tude one (12), catalyzer assembly (13), preceding suction tude two (14) and in the forward flange (15) that disappears; Wherein suction tude assembly (11) directly is connected with preceding suction tude one (12); Preceding suction tude one (12) is connected with catalyzer assembly (13), suction tude two (14) more successively; The forward flange (15) that disappears during suction tude two (14) is equipped with away from an end end of catalyzer assembly (13), and through in the forward flange (15) that disappears be connected with middle muffler assembly (2).

2. the car exhaust silencer that satisfies state's five emission standards according to claim 1; It is characterized in that: described catalyzer assembly (13) comprises front cover (13-1), liner (13-3), catalyzer (13-4), shell (13-2) and rear end cover (13-5); Wherein said catalyzer (13-4) and liner (13-3) are wrapped within the shell (13-2); Front cover (13-1) and rear end cover (13-5) then lay respectively at the two ends of shell (13-2); Wherein said front cover (13-1) is connected with preceding suction tude one (12), and rear end cover (13-5) then is communicated with preceding suction tude two (14).

3. the car exhaust silencer that satisfies state's five emission standards according to claim 1 is characterized in that: described suction tude assembly (11) and preceding suction tude one (12) joint are socketed with bellows (16).

4. the car exhaust silencer that satisfies state's five emission standards according to claim 2 is characterized in that: described liner (13-3) is positioned between catalyzer (13-4) and the shell (13-2).

5. the car exhaust silencer that satisfies state's five emission standards according to claim 2 is characterized in that: described front cover (13-1) is the same with rear end cover (13-5) shape, is tubaeform.

6. the car exhaust silencer that satisfies state's five emission standards according to claim 2; It is characterized in that: pipe assembly (1) is provided with hook near the tube wall of middle muffler assembly (2) before described; Simultaneously, back pipe assembly (3) also is provided with hook near the tube wall of middle muffler assembly (2).

7. the car exhaust silencer that satisfies state's five emission standards according to claim 1 is characterized in that: pipe assembly (1), middle muffler assembly (2), back pipe assembly (3) and rear muffler assembly (4) connect as one through welding manner before described.

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