KR20130057843A - Exhaust gas processing device and control method thereof - Google Patents

Exhaust gas processing device and control method thereof Download PDF

Info

Publication number
KR20130057843A
KR20130057843A KR1020110123796A KR20110123796A KR20130057843A KR 20130057843 A KR20130057843 A KR 20130057843A KR 1020110123796 A KR1020110123796 A KR 1020110123796A KR 20110123796 A KR20110123796 A KR 20110123796A KR 20130057843 A KR20130057843 A KR 20130057843A
Authority
KR
South Korea
Prior art keywords
exhaust gas
amount
reducing agent
nitrogen
nitrogen dioxide
Prior art date
Application number
KR1020110123796A
Other languages
Korean (ko)
Inventor
박지원
Original Assignee
현대자동차주식회사
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 현대자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020110123796A priority Critical patent/KR20130057843A/en
Publication of KR20130057843A publication Critical patent/KR20130057843A/en

Links

Images

Classifications

    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • 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
    • 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
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F01N2610/146—Control thereof, e.g. control of injectors or injection valves

Abstract

PURPOSE: An exhaust gas processing device and a control method thereof are provided to regulate a sprayed amount of a reducing agent, thereby minimizing the amount of ammonia ejected to atmosphere. CONSTITUTION: An exhaust gas processing device comprises an exhaust line(100), an oxidation catalyst(110), a smoke filter(140), a reducing agent spraying device(120), a differential pressure sensor(150), a control unit, and a temperature sensor(130). A method of controlling the exhaust gas processing device comprises: a step of calculating proportions of nitrogen oxide and nitrogen monoxide included in exhaust gas by using a mass flow of the exhaust gas and the temperature sensed by the temperature sensor; a step of calculating the amount of particulate matters collected by the differential pressure of the front and rear ends of the smoke filter and an operation condition of an engine; a step of calculating a reduced amount of the nitrogen oxide included in the exhaust gas according to the amount of particulate matters; and a step of regulating a sprayed amount of a reducing agent proportional to a reduced amount of nitrogen dioxide and the amount of the nitrogen oxide.

Description

Exhaust gas treatment system and its control method {EXHAUST GAS PROCESSING DEVICE AND CONTROL METHOD THEREOF}

The present invention relates to an exhaust gas treating apparatus and a control method thereof for reducing a nitrogen oxide contained in exhaust gas and regenerating a soot filter having a function of simultaneously collecting particulate matter.

In general, the exhaust gas discharged from the engine through the exhaust manifold is guided to a catalytic converter formed in the middle of the exhaust pipe and purified, and the noise is attenuated while passing through the muffler, and then released into the atmosphere through the tail pipe.

The catalytic converter treats pollutants contained in the exhaust gas. And a soot filter for trapping particulate matter (PM) contained in the exhaust gas is mounted on the exhaust pipe.

Selective Catalytic Reduction (SCR) equipment is a type of such catalytic converter. Selective Catalytic Reduction (SCR) devices are termed selective catalytic reduction in the sense that reducing agents such as urea, ammonia, carbon monoxide and hydrocarbons (HC) react better with nitrogen oxides in oxygen and nitrogen oxides. do.

Recently, a soot filter (SDPF or SCR-DPF) having a particulate trapping function and a nitrogen oxide reduction function has been developed, and a reducing agent spraying device is disposed upstream of such a soot filter.

The reducing agent spraying device sprays a reducing agent such as urea (ammonia), and the soot filter collects particulate matter and reduces nitrogen oxides.

On the other hand, when particulate matter is collected in the soot filter having a nitrogen oxide reduction function, the purification rate of nitrogen oxide is changed, and when urea (ammonia) is injected without considering the amount of particulate matter collected, urea (ammonia) is NOx. There is a problem that can not react with and the reducing agent such as ammonia contained in the exhaust gas is released to the atmosphere.

The present invention provides an exhaust gas treatment apparatus and a control method thereof capable of minimizing the release of a reducing agent slip to the atmosphere through a soot filter having a nitrogen oxide purification function and a particulate matter collection function.

According to the exhaust gas treatment apparatus according to the present invention as described above, an exhaust line through which the exhaust gas discharged from the engine passes, an oxidation catalyst installed on the exhaust line of the rear end of the engine, the exhaust end of the oxidation catalyst A soot filter installed on the line to collect particulate matter contained in the exhaust gas and to reduce nitrogen oxide, a reducing agent spraying device installed on the exhaust line between the oxidation catalyst and the soot filter, and a front and rear differential pressure in the soot filter Computing the amount of soot collected in the soot filter using a differential pressure sensor for detecting the pressure, and the signal detected by the differential pressure sensor, and controlling the amount of reducing agent to be injected from the reducing agent spraying device according to the calculated amount of soot It includes a control unit.

Further comprising a temperature sensor for sensing the temperature of the exhaust gas flowing into the soot filter.

The controller detects the temperature of the exhaust gas from the temperature sensor, calculates a ratio of nitrogen dioxide and nitrogen monoxide contained in the exhaust gas using the detected temperature and the mass flow rate of the exhaust gas, and calculates an operating condition of the engine and the The amount of particulate matter collected by the front and rear differential pressure of the soot filter is calculated, and the amount of nitrogen dioxide contained in the exhaust gas is calculated according to the amount of collected particulate matter, and the ratio of the nitrogen dioxide and the reduced nitrogen dioxide ratio is calculated. Therefore, the amount of reducing agent injected from the reducing agent spraying device is controlled.

The reducing agent is urea or ammonia.

The oxidation catalyst and the soot filter process exhaust gas in which diesel fuel is combusted.

Exhaust gas treatment method according to an embodiment of the present invention, the step of sensing the temperature of the exhaust gas of the rear end of the oxidation catalyst, calculating the amount of nitrogen dioxide using the temperature of the exhaust gas and the mass flow rate of the exhaust gas, the differential pressure Detecting the front and rear differential pressure of the particulate filter reducing nitrogen oxide using a sensor, calculating the amount of particulate matter collected in the particulate filter using the detected front and rear stage differential pressure, and the amount of particulate matter collected. Therefore, the method includes calculating a reduction amount of nitrogen dioxide, and controlling the injection amount of the reducing agent according to the reduced amount of nitrogen dioxide to regenerate the soot filter.

In the step of calculating the amount of nitrogen dioxide, the amount of nitrogen monoxide is calculated using the temperature of the exhaust gas and the mass flow rate of the exhaust gas, and in the step of regenerating the particulate filter, the nitrogen monoxide and the reduced amount of nitrogen dioxide The injection amount of the reducing agent is controlled according to the ratio.

According to the present invention for achieving this purpose, the amount of particulate matter (soot) collected by using the front and rear differential pressure of the soot filter (SDPF or SCR-DPF) having a nitrogen oxide removal function is determined, and accordingly nitrogen dioxide Calculate the amount of reduction, thereby reducing the injection amount of the reducing agent, it is possible to minimize the amount of ammonia discharged to the atmosphere.

1 is a schematic configuration diagram of an exhaust gas treating apparatus according to an embodiment of the present invention.
2 is a graph showing the conversion rate of nitrogen oxides and the temperature of the exhaust gas flowing into the soot filter in the exhaust gas treatment apparatus according to an embodiment of the present invention.
3 is a graph showing the relationship between the mass flow rate of the exhaust gas, the back pressure difference, and ash in the exhaust gas treating apparatus according to the embodiment of the present invention.
4 is a graph showing the relationship between the amount of soot, the back pressure difference, and the mass flow rate collected in the particulate filter according to the embodiment of the present invention.
5 is a graph showing the amount of nitrogen dioxide produced by particulate matter before particulate matter is collected in the particulate filter according to an embodiment of the present invention.
6 is a graph showing the amount of nitrogen dioxide produced before particulate matter is collected and regenerated in a soot filter according to an embodiment of the present invention.
7 is a flowchart for controlling the exhaust gas treating apparatus according to the embodiment 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 configuration diagram of an exhaust gas treating apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the exhaust gas treating apparatus includes an exhaust line 100, a diesel oxidation catalyst 110, a reducing agent spraying apparatus 120, a temperature sensor 130, a diesel particulate filter 140, and a differential pressure sensor 150. It includes.

The diesel particulate filter 140 is a particulate filter having a function of reducing nitrogen oxide contained in exhaust gas by using a reducing agent such as urea or ammonia injected from the reducing agent injection device 120.

In addition, the diesel particulate filter 140 also has a function of collecting, burning and regenerating particulate matter (Soot and ash) contained in the exhaust gas.

The diesel oxidation catalyst 110 (DOC) removes soluble organic matter (SOF) and particulate matter (PM, soot and ash) and a part of exhaust gas by using a catalyst component such as platinum or palladium. do. In addition, oxygen and carbon monoxide are removed.

The temperature sensor 130 detects the temperature of the exhaust gas flowing into the diesel particulate filter 140 and transmits it to a separate controller (not shown).

In addition, the control unit controls the reducing agent injection device 120, injects a reducing agent such as urea into the exhaust line 100, the differential pressure sensor 150 is the pressure difference between the front and rear ends of the diesel particulate filter 140. Detects and transmits the signal to the controller.

Separately, the control unit calculates the mass flow rate of the exhaust gas using the operating conditions of the engine, the control unit is the exhaust gas temperature detected by the temperature sensor 130, the differential pressure signal detected by the differential pressure sensor 150, and The reducing agent injection device 120 is controlled using the exhaust flow rate.

2 is a graph showing the conversion rate of nitrogen oxides and the temperature of the exhaust gas flowing into the soot filter in the exhaust gas treatment apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the horizontal axis represents the temperature of the exhaust gas flowing into the diesel particulate filter 140, and the vertical axis represents the purification rate (conversion rate) of nitrogen oxides. As shown, it can be seen that the conversion rate of nitrogen oxide is changed according to the ratio of nitrogen monoxide and nitrogen dioxide.

3 is a graph showing the relationship between the mass flow rate of the exhaust gas, the back pressure difference, and ash in the exhaust gas treating apparatus according to the embodiment of the present invention.

Referring to FIG. 3, the horizontal axis represents the mass flow rate of the exhaust gas, and the vertical axis represents the front and rear differential pressures (back pressure) of the diesel particulate filter 140. As shown, a back pressure difference occurs according to the amount of ash (Ash) collected in the diesel particulate filter (140).

Figure 4 is a graph showing the relationship between the amount of soot (soot), back pressure difference, and the mass flow rate collected by the soot filter in accordance with an embodiment of the present invention.

The horizontal axis represents the amount of particulate matter (soot) collected in the diesel particulate filter 140, and the vertical axis represents the front and rear differential pressure (back pressure) of the diesel particulate filter 140. As shown, it can be seen that the back pressure difference is generated differently according to the mass flow rate (m 3 / h) of the exhaust gas.

5 is a graph showing the amount of nitrogen dioxide produced by particulate matter before particulate matter is collected in the particulate filter according to an embodiment of the present invention, Figure 6 is the particulate matter is collected and regenerated in the particulate filter according to an embodiment of the present invention. It is a graph showing the amount of nitrogen dioxide produced before.

5 and 6, the horizontal axis represents the number of revolutions of the engine, the vertical axis represents the amount of fuel injected, as shown, the amount of nitrogen dioxide produced depends on the number of revolutions and the amount of fuel, the diesel particulate filter 140 Is associated with particulate matter (ash, soot) trapped in

In more detail, when the nitrogen oxide contained in the exhaust gas is removed by urea or ammonia, the purification performance depends on the ratio of nitrogen monoxide and nitrogen dioxide, and thus the amount of the reducing agent to be injected must also be changed.

It is a diesel particulate filter, but is collected in addition to particulate matter (including ash) in the SDPF which includes a nitrogen oxide removal function using a reducing agent.

The proportion of nitrogen dioxide is lowered by the natural regeneration (combustion) of the collected particulate matter, and the purification rate of nitrogen oxides (NOx) is lowered.

Here, although the urea or ammonia injected from the reducing agent spraying device 120 is not used in the diesel particulate filter 140, there is a problem that is discharged to the atmosphere, in the embodiment of the present invention is collected in the diesel particulate filter 140 The amount of reducing agent injected from the reducing agent spraying device 120 is reduced according to the amount of particulate matter.

Therefore, ammonia is prevented from slipping in the diesel particulate filter 140 and being released into the atmosphere.

In the embodiment of the present invention, the amount of particulate matter collected using the front and rear differential pressure (back pressure) of the diesel particulate filter 140, and accordingly calculates the ratio of nitrogen dioxide and nitrogen monoxide, accordingly urea or To control the amount of ammonia.

7 is a flowchart for controlling the exhaust gas treating apparatus according to the embodiment of the present invention.

Referring to FIG. 7, the mass flow rate of the exhaust gas according to the rotation speed of the engine is determined in S700, and the temperature of the exhaust gas at the front end of the diesel particulate filter 140, ie, at the rear end of the diesel oxidation catalyst 110, is determined at S710. Detect.

In S720, the amount of nitrogen dioxide (NO 2) flowing into the diesel particulate filter (SDPF or SCR-DPF) is calculated using the calculated or sensed temperature and mass flow rate of the exhaust gas.

In operation S730, the back pressure (differential pressure) of the front and rear ends of the diesel particulate filter 140 is sensed using the differential pressure sensor 150, and the back pressure (differential pressure) due to particulate matter (soot) is calculated in S7840.

In Equation 1), the total back pressure (Ptotal) is the sum of the soot pressure (Psoot), the ash pressure (Pahs), and the system pressure (P system), which is calculated by multiplying the constant (α) again. . In addition, the pressure Psoot due to soot is calculated by Equation 2 again.

In an embodiment of the invention, Ptotal is sensed with a differential pressure sensor and the P system is replaced with a constant k value that does not change. In addition, the constant (α) value is also set in advance. The value of Pash is set by the preset experimental value. The amount of ash deposited can be predicted based on engine oil consumption, and the Pash value can be predicted.

Therefore, in S750, the pressure Psoot value by soot is calculated | required, and the amount of soot collection by it is calculated. In S760, a reduction amount of nitrogen dioxide is calculated (determined) according to the amount of soot collected, and in S770, the injection amount of urea or ammonia injected from the reducing agent injection device 120 is controlled, and the diesel particulate filter (S780). 140) forcibly played.

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.

100: exhaust line
110: diesel oxidation catalyst
120: reducing agent injection device
130: Temperature sensor
140: diesel particulate filter
150: differential pressure sensor

Claims (7)

An exhaust line through which exhaust gas discharged from the engine passes;
An oxidation catalyst installed at the rear end of the engine on the exhaust line;
A soot filter installed on a rear end of the oxidation catalyst to collect particulate matter contained in exhaust gas and to reduce nitrogen oxides;
A reducing agent spraying device installed on the exhaust line between the oxidation catalyst and the soot filter;
A differential pressure sensor detecting a differential pressure before and after the soot filter; And
A control unit for calculating the amount of soot collected in the soot filter using the signal detected by the differential pressure sensor, and controlling the amount of reducing agent to be injected from the reducing agent spraying device according to the calculated amount of soot; Exhaust gas treatment apparatus comprising a. In claim 1,
A temperature sensor for sensing a temperature of exhaust gas flowing into the particulate filter; Exhaust gas treatment apparatus comprising a further. In claim 1,
The control unit,
Detect the temperature of the exhaust gas from the temperature sensor,
The ratio of nitrogen dioxide and nitrogen monoxide contained in the exhaust gas is calculated using the detected temperature and the mass flow rate of the exhaust gas.
Calculate the amount of particulate matter collected by the operating conditions of the engine and the differential pressure before and after the soot filter,
The amount of reduction of nitrogen dioxide contained in the exhaust gas is calculated according to the amount of trapped particulate matter,
And controlling the amount of reducing agent injected from the reducing agent spraying device according to the ratio of the nitrogen dioxide and the reduced nitrogen dioxide. 4. The method of claim 3,
The reducing agent is an exhaust gas treatment device, characterized in that urea or ammonia. 4. The method of claim 3,
The oxidation catalyst and the soot filter is an exhaust gas treatment device, characterized in that for treating the exhaust gas of diesel fuel burned. Sensing the temperature of the exhaust gas at the rear end of the oxidation catalyst;
Calculating an amount of nitrogen dioxide using the temperature of the exhaust gas and the mass flow rate of the exhaust gas;
Sensing the front and rear differential pressure of the soot filter which reduces nitrogen oxide using a differential pressure sensor;
Calculating an amount of particulate matter collected in the particulate filter by using the sensed pressure difference between the front and rear ends;
Calculating a reduction amount of nitrogen dioxide according to the amount of particulate matter collected;
Regenerating the particulate filter by controlling the injection amount of a reducing agent according to the reduced amount of nitrogen dioxide; Exhaust gas treatment method comprising a. The method of claim 6,
In the step of calculating the amount of nitrogen dioxide, the amount of nitrogen monoxide is calculated using the temperature of the exhaust gas and the mass flow rate of the exhaust gas,
In the regenerating the particulate filter, controlling the injection amount of the reducing agent according to the ratio of the nitrogen monoxide and the reduced nitrogen dioxide.
KR1020110123796A 2011-11-24 2011-11-24 Exhaust gas processing device and control method thereof KR20130057843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110123796A KR20130057843A (en) 2011-11-24 2011-11-24 Exhaust gas processing device and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110123796A KR20130057843A (en) 2011-11-24 2011-11-24 Exhaust gas processing device and control method thereof

Publications (1)

Publication Number Publication Date
KR20130057843A true KR20130057843A (en) 2013-06-03

Family

ID=48857322

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110123796A KR20130057843A (en) 2011-11-24 2011-11-24 Exhaust gas processing device and control method thereof

Country Status (1)

Country Link
KR (1) KR20130057843A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101498177B1 (en) * 2014-11-25 2015-03-04 세종공업 주식회사 Urea mixing apparatus having multilayer plate
KR101498178B1 (en) * 2014-11-25 2015-03-04 세종공업 주식회사 Urea mixing apparatus having swirl unit
KR20150096328A (en) * 2014-02-14 2015-08-24 도이츠 악티엔게젤샤프트 Combustion engine
KR101655211B1 (en) * 2015-03-30 2016-09-07 현대자동차 주식회사 SYSTEM OF PURIFYING EXHAUST GAS PROVIDED WITH LEAN NOx TRAP AND SELECTIVE CATALYTIC REDUCTION CATALYST AND METHOD OF CONTROLLING THE SAME
US20180230875A1 (en) * 2015-08-27 2018-08-16 Scania Cv Ab Method and exhaust treatment system for treatment of an exhaust gas stream
US11007481B2 (en) 2015-08-27 2021-05-18 Scania Cv Ab Exhaust treatment system and method for treatment of an exhaust gas stream

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150096328A (en) * 2014-02-14 2015-08-24 도이츠 악티엔게젤샤프트 Combustion engine
KR101498177B1 (en) * 2014-11-25 2015-03-04 세종공업 주식회사 Urea mixing apparatus having multilayer plate
KR101498178B1 (en) * 2014-11-25 2015-03-04 세종공업 주식회사 Urea mixing apparatus having swirl unit
KR101655211B1 (en) * 2015-03-30 2016-09-07 현대자동차 주식회사 SYSTEM OF PURIFYING EXHAUST GAS PROVIDED WITH LEAN NOx TRAP AND SELECTIVE CATALYTIC REDUCTION CATALYST AND METHOD OF CONTROLLING THE SAME
US9551252B2 (en) 2015-03-30 2017-01-24 Hyundai Motor Company System and method of purifying exhaust gas provided with lean NOx trap and selective catalytic reduction catalyst
US20180230875A1 (en) * 2015-08-27 2018-08-16 Scania Cv Ab Method and exhaust treatment system for treatment of an exhaust gas stream
US10920632B2 (en) * 2015-08-27 2021-02-16 Scania Cv Ab Method and exhaust treatment system for treatment of an exhaust gas stream
US11007481B2 (en) 2015-08-27 2021-05-18 Scania Cv Ab Exhaust treatment system and method for treatment of an exhaust gas stream

Similar Documents

Publication Publication Date Title
JP5087836B2 (en) Exhaust gas purification system control method and exhaust gas purification system
KR101048144B1 (en) Exhaust system
WO2014136832A1 (en) Control method for exhaust gas aftertreatment device
KR20130057843A (en) Exhaust gas processing device and control method thereof
KR101795394B1 (en) Exhaust system and control method of amount of urea supply
CN102844538B (en) Exhaust gas purification device, and control method for exhaust gas purification device
JP6054057B2 (en) Exhaust gas purification filter, smoke filter regeneration system, and regeneration method thereof
US9562452B2 (en) System and method for controlling regeneration within an after-treatment component of a compression-ignition engine
US20120144802A1 (en) Exhaust system having doc regeneration strategy
KR101189241B1 (en) METHOD FOR PREDICTING REGENERATION OF DeNOx CATALYST AND EXHAUST SYSTEM USING THE SAME
US20160108791A1 (en) Aftertreatment Control for Detection of Fuel Contaminant Concentration
JP2011089434A (en) Exhaust emission control device in internal combustion engine
US9228468B2 (en) Targeted regeneration of a catalyst in an aftertreatment system
JP2011220158A (en) Exhaust emission control device for engine
CN203925695U (en) The control system of engine exhaust temperature
JP2010038034A (en) Control method of exhaust emission control device
KR20120128938A (en) Particulate filter for vehicle and exhaust system using the same
WO2013027546A1 (en) Exhaust gas purification device
KR101575478B1 (en) Apparatus and method for exhaust gas recirculation
KR101724453B1 (en) System for purifying exhaust gas and method for controlling the same
KR102054214B1 (en) System for after-treatment of exhaust gas, and method for controlling of the same
KR20200141170A (en) System for after-treatment of exhaust gas, and method for controlling of the same
KR101240937B1 (en) Regeneration method and apparatus of diesel particulate filter
KR20120036008A (en) Vehicle emission purification system
JP2005256714A (en) Exhaust emission control device for internal combustion engine

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application