KR20160051359A - Exhaust gas purification system for vehicle - Google Patents
Exhaust gas purification system for vehicle Download PDFInfo
- Publication number
- KR20160051359A KR20160051359A KR1020140151235A KR20140151235A KR20160051359A KR 20160051359 A KR20160051359 A KR 20160051359A KR 1020140151235 A KR1020140151235 A KR 1020140151235A KR 20140151235 A KR20140151235 A KR 20140151235A KR 20160051359 A KR20160051359 A KR 20160051359A
- Authority
- KR
- South Korea
- Prior art keywords
- exhaust gas
- oxidation catalyst
- diesel oxidation
- catalyst
- reducing agent
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9459—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts
- B01D53/9477—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts with catalysts positioned on separate bricks, e.g. exhaust systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/36—Arrangements for supply of additional fuel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Toxicology (AREA)
- General Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The present invention relates to an exhaust gas purifying apparatus for an automobile which can efficiently purify nitrogen oxides while reducing production costs.
An exhaust gas purifying apparatus for an automobile according to an embodiment of the present invention includes a diesel oxidation catalyst unit mounted on an exhaust pipe configured to exhaust exhaust gas of an engine and oxidizing a part of the exhaust gas; And a composite catalyst unit connected to a downstream end of the diesel oxidation catalyst unit and mounted on the exhaust pipe, for collecting particulate matter contained in the exhaust gas and purifying the particulate matter, and forming an oxidation catalyst and a selective reduction catalyst on the particulate filter .
A reducing agent may be injected between the diesel oxidation catalyst part and the composite catalyst part.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an exhaust gas purifying apparatus for an automobile, and more particularly, to an exhaust gas purifying apparatus for an automobile capable of reducing pollutants in the exhaust gas.
BACKGROUND ART Generally, an exhaust system of an engine includes a diesel oxidation catalyst (DOC) to reduce carbon monoxide (CO), hydrocarbons (HC), particulate matter, nitrogen oxides (NOx) A DPF (Diesel Particulate matter Filter), an SCR (Selective Catalyst Reduction), an LNT (Lean NOx Trap), and the like.
The DOC oxidizes total hydrocarbons and carbon monoxide in the exhaust gas and oxidizes nitrogen monoxide to nitrogen dioxide.
The DPF captures the particulate matter contained in the exhaust gas and purifies the particulate matter through a chemical conversion process.
In SCR, the reducing agent (urea) injected in the direction of the exhaust gas through the injector is converted into ammonia (NH 3 ) by the heat of the exhaust gas, and the NOx and ammonia in the exhaust gas by the SCR catalyst, It is reduced to nitrogen gas (N 2 ) and water (H 2 O).
The LNT functions to absorb nitrogen oxides contained in the exhaust gas and to react with the reducing agent in a predetermined condition to remove the nitrogen oxides.
On the other hand, when the DOC or the LNT and the DPF are arranged so that the exhaust gas passes through the DPF via the DOC or the LNT, and the reducing agent (element) is injected by the injector between the DOC or the LNT and the DPF, May be contacted with DOC or LNT, which is a shear catalyst, so that NOx may be additionally generated. In order to prevent the further generation of such NOx, an injector having a small injection angle may be used.
However, when the injector having a small injection angle is used, the flow uniformity of the urea or ammonia is lowered, and the mixing efficiency of the nitrogen oxide and the ammonia, which causes the catalytic reaction, may be lowered. Thus, an additional mixer may be required.
SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide an apparatus for purifying exhaust gas of automobiles, which can efficiently purify nitrogen oxides while reducing production costs.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided an exhaust gas purifying apparatus for an automotive vehicle, comprising: a diesel oxidation catalyst unit mounted on an exhaust pipe configured to exhaust exhaust gas of an engine, And a composite catalyst unit connected to a downstream end of the diesel oxidation catalyst unit and mounted on the exhaust pipe, for collecting particulate matter contained in the exhaust gas and purifying the particulate matter, and forming an oxidation catalyst and a selective reduction catalyst on the particulate filter .
A reducing agent may be injected between the diesel oxidation catalyst part and the composite catalyst part.
The apparatus for purifying exhaust gas of an automobile may further include a reduction catalyst unit provided at a rear stage of the diesel oxidation catalyst unit and reducing a part of the exhaust gas.
Between the diesel oxidation catalyst part and the composite catalyst part, the reducing agent can be injected by the injector.
The apparatus for purifying exhaust gas of an automobile may further include an injection chamber connecting the diesel oxidation catalyst unit and the composite catalyst unit as a part of the exhaust pipe and forming a space through which the reducing agent is injected by the injector.
The reducing catalyst portion and the composite catalyst portion may reduce some of the exhaust gas using a reducing agent injected into the injection chamber.
An apparatus for purifying exhaust gas of an automobile according to another embodiment of the present invention includes: a nitrogen oxide purifier installed in an exhaust pipe configured to exhaust exhaust gas of an engine, for storing and reducing nitrogen oxide in exhaust gas; And a composite catalyst unit connected to a downstream end of the diesel oxidation catalyst unit through the exhaust pipe and having an oxidation catalyst and a selective reduction catalyst formed on a particulate filter for trapping and purifying particulate matter contained in the exhaust gas .
A reducing agent may be injected between the diesel oxidation catalyst part and the composite catalyst part.
The exhaust purification apparatus of the automobile may further include a reduction catalyst unit provided at a rear end of the nitrogen oxide purification apparatus and reducing a part of the exhaust gas.
Between the nitrogen oxide purification apparatus and the composite catalyst unit, the reducing agent can be injected by the injector.
The apparatus for purifying exhaust gas of an automobile may further include an injection chamber which connects the nitrogen oxide purification apparatus and the composite catalyst unit as a part of the exhaust pipe and forms a space through which the reducing agent is injected by the injector.
The reducing catalyst portion and the composite catalyst portion may reduce some of the exhaust gas using a reducing agent injected into the injection chamber.
As described above, according to the embodiment of the present invention, since the reducing catalyst is provided at the downstream of the diesel oxidation catalyst, contact between the reducing agent injected from the injector and the diesel oxidation catalyst can be prevented. Therefore, it is possible to use an injector having a large injection angle, additional components such as a mixer can be eliminated, and the production cost can be reduced.
Further, since the reducing catalyst is provided at the downstream end of the diesel oxidation catalyst, the reducing catalyst is brought close to the engine, so that the heating of the reducing catalyst by the exhaust gas at high temperature can be facilitated and the purification performance of the nitrogen oxide can be improved.
1 is a schematic block diagram of an exhaust gas purifying apparatus for an automobile according to an embodiment of the present invention.
2 is a schematic block diagram of an exhaust gas purifying apparatus for an automobile according to another embodiment of the present invention.
3 is a configuration diagram of an exhaust gas purifying apparatus for an automobile according to embodiments of the present invention.
4 is a graph showing the effect of the exhaust gas purifying apparatus for an automobile according to the embodiments of the present invention.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 is a schematic block diagram of an exhaust gas purifying apparatus for an automobile according to an embodiment of the present invention.
1, an exhaust gas purifying apparatus for an automobile according to an embodiment of the present invention is connected to an
The diesel
The diesel
The
The
The
2 is a schematic block diagram of an exhaust gas purifying apparatus for an automobile according to another embodiment of the present invention.
2, the apparatus for purifying exhaust gas of an automobile according to another embodiment of the present invention includes an exhaust gas purifying apparatus for purifying exhaust gas of an automobile according to an embodiment of the present invention, 20, a lean NOx trap (LNT) 25 is disposed.
In other words, the
The nitrogen
That is, the apparatus for purifying exhaust gas of an automobile according to the embodiments of the present invention may include an exhaust gas purifying apparatus based on the diesel
As shown in FIGS. 1 and 2, a reducing agent is dosed between the
Hereinafter, the injection of the reducing agent will be described in detail with reference to FIG.
3 is a configuration diagram of an exhaust gas purifying apparatus for an automobile according to embodiments of the present invention.
3, the apparatus for purifying exhaust gas of an automobile according to the embodiments of the present invention further includes an
The
The
The
4 is a graph showing the effect of the exhaust gas purifying apparatus for an automobile according to the embodiments of the present invention.
The abscissa of the graph represents the time in seconds and the ordinate represents the temperature in degrees Celsius. In addition, the solid line in the graph represents the temperature change with time of the diesel
4, the temperature of the diesel
As described above, according to the embodiment of the present invention, since the reducing
While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.
10: Engine
12: Exhaust pipe
20: Diesel oxidation catalyst part
25: Nitrogen oxide purification device
30: Reduction catalyst part
40: composite catalyst part
50: injector
55: injection chamber
Claims (10)
A composite catalyst unit connected to a downstream end of the diesel oxidation catalyst unit and mounted on the exhaust pipe and having an oxidation catalyst and a selective reduction catalyst formed on a particulate filter for trapping and purifying particulate matter contained in the exhaust gas;
Lt; / RTI >
And a reducing agent is injected between the diesel oxidation catalyst part and the composite catalyst part.
Further comprising a reduction catalyst section provided at a downstream end of the diesel oxidation catalyst section and reducing a part of the exhaust gas.
Wherein the reducing agent is injected between the diesel oxidation catalyst part and the composite catalyst part by an injector.
And an injection chamber connected to the diesel oxidation catalyst unit and the composite catalyst unit to form a space through which the reducing agent is injected by the injector as a part of the exhaust pipe.
Wherein the reducing catalyst part and the composite catalyst part reduce a part of the exhaust gas using a reducing agent injected into the injection chamber.
A composite catalyst unit connected to a downstream end of the diesel oxidation catalyst unit through the exhaust pipe and having an oxidation catalyst and a selective reduction catalyst formed on a particulate filter for trapping and purifying particulate matter contained in the exhaust gas;
Lt; / RTI >
And a reducing agent is injected between the diesel oxidation catalyst part and the composite catalyst part.
Further comprising a reduction catalyst unit provided at a rear stage of the nitrogen oxide purification apparatus and reducing a part of the exhaust gas.
Wherein the reducing agent is injected between the nitrogen oxide purification apparatus and the composite catalyst unit by an injector.
And an injection chamber for connecting the nitrogen oxide purification unit and the composite catalyst unit as a part of the exhaust pipe and forming a space through which the reducing agent is injected by the injector.
Wherein the reducing catalyst part and the composite catalyst part reduce a part of the exhaust gas using a reducing agent injected into the injection chamber.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020140151235A KR101628098B1 (en) | 2014-11-03 | 2014-11-03 | Exhaust gas purification system for vehicle |
CN201510190815.5A CN106150622B (en) | 2014-11-03 | 2015-04-21 | Emission control system for vehicle |
DE102015106947.4A DE102015106947A1 (en) | 2014-11-03 | 2015-05-05 | Emission control system for a vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020140151235A KR101628098B1 (en) | 2014-11-03 | 2014-11-03 | Exhaust gas purification system for vehicle |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20160051359A true KR20160051359A (en) | 2016-05-11 |
KR101628098B1 KR101628098B1 (en) | 2016-06-08 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020140151235A KR101628098B1 (en) | 2014-11-03 | 2014-11-03 | Exhaust gas purification system for vehicle |
Country Status (3)
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KR (1) | KR101628098B1 (en) |
CN (1) | CN106150622B (en) |
DE (1) | DE102015106947A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108495980A (en) * | 2016-09-23 | 2018-09-04 | 韩国电力公社 | Waste gas purification apparatus and the method for purifying exhaust gas using the waste gas purification apparatus |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114320539B (en) * | 2020-10-10 | 2022-12-27 | 长城汽车股份有限公司 | Automobile exhaust aftertreatment device and automobile |
Citations (3)
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KR100769571B1 (en) * | 2007-05-29 | 2007-10-23 | 한국기계연구원 | Harmfulness matter reduction system of diesel engine |
KR20110024598A (en) * | 2009-09-02 | 2011-03-09 | 현대자동차주식회사 | Nox reduction device for diesel vehicles |
KR20140062899A (en) * | 2012-11-12 | 2014-05-27 | 현대자동차주식회사 | Exhaust gas purification system of vehicle |
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JP3892452B2 (en) * | 2004-07-16 | 2007-03-14 | 日産ディーゼル工業株式会社 | Engine exhaust purification system |
JP4263711B2 (en) * | 2005-09-16 | 2009-05-13 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
DE102006009934A1 (en) * | 2006-03-03 | 2007-09-06 | Daimlerchrysler Ag | Exhaust gas aftertreatment system and process for exhaust gas purification |
US8122712B2 (en) * | 2008-01-03 | 2012-02-28 | GM Global Technology Operations LLC | Exhaust system with improved NOX emission control |
EP2399011B1 (en) * | 2009-02-20 | 2013-04-24 | Haldor Topsøe A/S | Method for purification of exhaust gas from a diesel engine |
KR101048144B1 (en) * | 2009-11-02 | 2011-07-08 | 기아자동차주식회사 | Exhaust system |
KR101251517B1 (en) * | 2010-12-09 | 2013-04-05 | 현대자동차주식회사 | Exhaust gas post processing system |
KR101427919B1 (en) * | 2012-10-11 | 2014-09-23 | 현대자동차 주식회사 | System for purifying exhaust of vehicle and regeneration control method thereof |
-
2014
- 2014-11-03 KR KR1020140151235A patent/KR101628098B1/en active IP Right Grant
-
2015
- 2015-04-21 CN CN201510190815.5A patent/CN106150622B/en active Active
- 2015-05-05 DE DE102015106947.4A patent/DE102015106947A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100769571B1 (en) * | 2007-05-29 | 2007-10-23 | 한국기계연구원 | Harmfulness matter reduction system of diesel engine |
KR20110024598A (en) * | 2009-09-02 | 2011-03-09 | 현대자동차주식회사 | Nox reduction device for diesel vehicles |
KR20140062899A (en) * | 2012-11-12 | 2014-05-27 | 현대자동차주식회사 | Exhaust gas purification system of vehicle |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108495980A (en) * | 2016-09-23 | 2018-09-04 | 韩国电力公社 | Waste gas purification apparatus and the method for purifying exhaust gas using the waste gas purification apparatus |
US11053824B2 (en) | 2016-09-23 | 2021-07-06 | Korea Electric Power Corporation | Exhaust gas purification apparatus and exhaust gas purification method using same |
Also Published As
Publication number | Publication date |
---|---|
KR101628098B1 (en) | 2016-06-08 |
CN106150622B (en) | 2019-09-27 |
DE102015106947A1 (en) | 2016-05-04 |
CN106150622A (en) | 2016-11-23 |
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