CN106401704B - Sulfur poisoning eliminating device for SCR (selective catalytic reduction) catalyst of diesel engine and using method of sulfur poisoning eliminating device - Google Patents

Sulfur poisoning eliminating device for SCR (selective catalytic reduction) catalyst of diesel engine and using method of sulfur poisoning eliminating device Download PDF

Info

Publication number
CN106401704B
CN106401704B CN201610963752.7A CN201610963752A CN106401704B CN 106401704 B CN106401704 B CN 106401704B CN 201610963752 A CN201610963752 A CN 201610963752A CN 106401704 B CN106401704 B CN 106401704B
Authority
CN
China
Prior art keywords
scr catalyst
sensor
dpf
air inlet
sulfur poisoning
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
CN201610963752.7A
Other languages
Chinese (zh)
Other versions
CN106401704A (en
Inventor
陈镇
殷勇
项旭昇
黄永祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongfeng Trucks Co ltd
Original Assignee
Dongfeng Trucks Co ltd
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 Dongfeng Trucks Co ltd filed Critical Dongfeng Trucks Co ltd
Priority to CN201610963752.7A priority Critical patent/CN106401704B/en
Publication of CN106401704A publication Critical patent/CN106401704A/en
Application granted granted Critical
Publication of CN106401704B publication Critical patent/CN106401704B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
    • 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
    • F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—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 using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—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 using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
    • 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
    • F01N2390/00—Arrangements for controlling or regulating exhaust apparatus
    • F01N2390/02—Arrangements for controlling or regulating exhaust apparatus using electric components only
    • 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
    • F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
    • F01N2410/04—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device during regeneration period, e.g. of particle filter
    • 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
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/06—By-pass 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0416—Methods of control or diagnosing using the state of a sensor, e.g. of an exhaust gas 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • F01N2900/1404—Exhaust gas temperature
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • F01N2900/1406—Exhaust gas pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The sulfur poisoning eliminating device for SCR catalyst of diesel engine includes DOC, DPF, SCR catalyst, bypass pipeline with electrically controlled regulating valve and post-treatment controller, and features that the air inlet end of DOC is communicated via air inlet pipeline, turbocharger and exhaust pipe of engine, the air outlet end of DOC is communicated via DPF with SCR catalyst, the air inlet and outlet ends of bypass pipeline are communicated via exhaust pipe and air inlet pipeline separately, and the air inlet pipeline is provided with one temperature sensor and one NO pipelineXThe sensor and the DPF regenerate fuel nozzle, pressure sensors are arranged at the air inlet end and the air outlet end of the DPF, and a second temperature sensor and a second NO are respectively arranged at the air inlet end and the air outlet end of the SCR catalystXWhen the sensor is used, the aftertreatment controller controls the DPF regeneration fuel nozzle and the electric control regulating valve according to whether DPF regeneration is needed or not and the operation working condition of the diesel engine so as to meet the high-temperature condition of SCR catalyst desulfurization. The design makes the fuel economy of the engine deteriorate to a low degree.

Description

A kind of diesel SCR catalytic device sulfur poisoning cancellation element and its application method
Technical field
The invention belongs to diesel emissions to post-process field, and in particular to a kind of diesel SCR catalytic device sulfur poisoning elimination Device and its application method are suitable for reducing engine fuel economy deterioration degree.
Background technique
To cope with the emission regulation demands being increasingly stringenter, large diesel engine has generallyd use DOC+ after the Europe VI stage The after-treatment system of DPF+SCR+ASC, wherein selective catalytic reduction (SCR) is that diesel engine meets most having for NOx emission target One of technology of effect.Influence, worst cold case NO in the VI after-treatment system of Europe in view of dpf regeneration temperature to SCRXHeight conversion effect The reasons such as the demand of rate, market have generallyd use copper-based zeolite type SCR.However, there is sulfur poisonings to ask by copper-based zeolite type SCR Topic, test data show large diesel engine run under the conditions of sulfur content 50ppm diesel oil 100 hours SCR conversion efficiencies may under Drop 20%, and 15 hours SCR conversion efficiencies are run under the conditions of sulfur content 350ppm diesel engine will decline 20%.And the Europe VI stage OBD is very high to post-processing coherence request, and it is exceeded that SCR sulfur poisoning will lead to DS NOx Est, leads to that engine is alarmed and limit is turned round, sternly Ghost image rings the operation of engine.
Copper-based SCR mechanism of sulfur poisoning is that the S in engine combustion process intermediate fuel oil aoxidizes to form SO2, and with it is metalliferous Catalyst converter wash coat or water react to form sulfate or sulfuric acid, are finally adsorbed on the surface of catalyst, lead to SCR Decrease in efficiency.Copper-based SCR sulfur poisoning phenomenon is not permanent damage, can be carried out by 500 DEG C or more of high-temperature gas Desulfurization regeneration, the transfer efficiency of desulfurization regeneration SCR can be restored to level before sulfur poisoning.However the temperature is in diesel engine conventional operation Under the conditions of almost impossible reach.
Chinese patent: application publication number CN105370355A, data of publication of application are the patent of invention on March 2nd, 2016 A kind of engine aftertreatment system is disclosed, including urging with the sequentially connected turbocharger of the exhaust piping of engine, oxidation Change converter DOC, particulate matter trap DPF, SCR device, and corresponding temperature sensor, pressure sensor, nitrogen oxygen are set and passed Sensor etc..The transformation efficiency of NOx can be reduced seriously after SCR device sulfur poisoning in the system, therefore in actual application, Need to carry out it sulfur poisoning monitoring, and regular desulfurization.Dpf regeneration fuel injector cartridge is generallyd use at present in the VI after-treatment system of Europe It sets and carries out heating realization high temperature desulfurizing regeneration, but frequent active oil spout heating desulfurization will lead to serious engine fuel economy Property deteriorate.
Summary of the invention
The purpose of the present invention is overcoming the problems, such as that engine fuel economy deterioration degree of the existing technology is higher, mention For a kind of structure simple, the lower diesel SCR catalytic device sulfur poisoning cancellation element of engine fuel economy deterioration degree and Its application method.
In order to achieve the above object, technical scheme is as follows:
A kind of diesel SCR catalytic device sulfur poisoning cancellation element, including the conversion of engine, turbocharger, oxidation catalysis Device DOC, particulate matter trap DPF, SCR catalyst, the inlet end of the DOC pass sequentially through air inlet pipeline, turbocharger with The exhaust pipe of engine is connected to, and the exhaust end of DOC is communicated by DPF with SCR catalyst, and No.1 temperature is provided on air inlet pipeline Spend sensor, No.1 NOXSensor, the inlet and outlet end of DPF are provided with pressure sensor, the inlet and outlet end of SCR catalyst It is respectively arranged with No. two temperature sensors, No. two NOXSensor；
The system also includes bypass line, dpf regeneration fuel nozzle, the inlet and outlet end of the bypass line respectively with Exhaust pipe, air inlet pipeline communicate, and electric controlled regulating valve is provided on bypass line, and the dpf regeneration fuel nozzle is arranged in air inlet On pipeline, and No.1 temperature sensor, No.1 NOXSensor, pressure sensor, No. two temperature sensors, No. two NOXSensor, Electric controlled regulating valve, dpf regeneration fuel nozzle are connect with aftertreatment controller signal.
The SCR catalyst is copper-based zeolite type SCR.
A kind of application method of diesel SCR catalytic device sulfur poisoning cancellation element, successively the following steps are included:
S1: the aftertreatment controller is according to No.1 NOXSensor, No. two NOXThe row of the detection data of sensor, vehicle It sails distance, fuel consumption and last time elimination sulfur poisoning and judges whether that needing to eliminate SCR urges with the running time of rear vehicle Change the sulfur poisoning of device, if desired, enter step S2；
S2: detection data, carbon carrying capacity of the aftertreatment controller based on pressure sensor calculate, limit carbon carrying capacity is set Value judges whether DPF needs to regenerate, if desired, enters step S4, S3 is entered step if not needing；
S3: implement exhaust gas bypass control to enter step S6 after eliminating sulfur poisoning；
S4: the aftertreatment controller according to the detection data of No. two temperature sensors control dpf regeneration fuel nozzle to Fuel oil is sprayed in air inlet pipeline, to realize the initiative regeneration of DPF, and removes the sulphur in SCR catalyst；
S5: the aftertreatment controller judges whether dpf regeneration is completed, if completing, enters step S6, if not completing again It is secondary to enter step S4；
S6: the aftertreatment controller judges whether the sulfur poisoning of SCR catalyst has been removed, and is again introduced into if not removing Step S1；
Wherein, implementation exhaust gas bypass control to eliminate sulfur poisoning successively the following steps are included:
S31: the aftertreatment controller judges whether diesel engine is in high according to the detection data of No.1 temperature sensor Temperature, high air-fuel ratio operating condition, if so, S34 is entered step, if it is not, then entering step S32；
S32: the aftertreatment controller judges whether the sulphur accumulated time of SCR catalyst and SCR conversion efficiency drop to Limiting value, if so, S33 is entered step, if it is not, being then again introduced into step S31；
S33: the aftertreatment controller according to the detection data of No. two temperature sensors control dpf regeneration fuel nozzle to Fuel oil is sprayed in air inlet pipeline to remove the sulphur in SCR catalyst；
S34: the aftertreatment controller controls the aperture of electric controlled regulating valve according to the detection data of No. two temperature sensors, The inlet temperature of SCR catalyst is set to reach 500~550 DEG C, to remove the sulphur in SCR catalyst.
Compared with prior art, the invention has the benefit that
1, a kind of diesel SCR catalytic device sulfur poisoning cancellation element of the present invention includes bypass line, the spray of dpf regeneration fuel oil The inlet and outlet end of mouth, bypass line is communicated with exhaust pipe, air inlet pipeline respectively, and electric controlled regulating valve is provided on bypass line, Dpf regeneration fuel nozzle is arranged on air inlet pipeline, and dpf regeneration fuel nozzle can be when needing DPF initiative regeneration to air inlet pipe Appropriate fuel oil is sprayed in road, fuel oil can realize SCR catalyst after DOC oxidation heating while realizing DPF initiative regeneration High temperature desulfurizing, bypass line enables portion to be directly bypassed on air inlet pipeline without turbocharger, to protect It demonstrate,proves delivery temperature of the engine under high speed, middle and high load working condition and is promoted to 500 DEG C or more, to realize the height of SCR catalyst Warm desulfurization, the design combine both desulfurization methods of exhaust gas bypass before DPF oil spout regeneration and turbine, on the one hand, Neng Gouke The high temperature desulfurizing for the realization SCR catalyst leaned on, desulfurization effect is preferable, ensure that the efficiency of Europe VI after-treatment system, on the other hand, The system not only to the change of former after-treatment system less, structure is simple, adaptability is good, but also reduce DPF oil spout as far as possible Regenerated number, reduces costs, and keeps engine fuel economy deterioration degree lower.Therefore, the present invention not only imitate by desulfurization Fruit is good, and makes engine fuel economy deterioration degree lower.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of present system.
Fig. 2 is the flow chart of the method for the present invention.
Fig. 3 is the flow chart for implementing exhaust gas bypass control in the method for the present invention.
In figure: engine 1, exhaust pipe 11, turbocharger 2, oxidation catalytic converter DOC3, air inlet pipeline 31, particle Object trap DPF4, SCR catalyst 5, No.1 temperature sensor 61, No.1 NOX63, No. two sensor 62, pressure sensor temperature Spend 64, No. two NO of sensorXSensor 65, bypass line 7, electric controlled regulating valve 8, dpf regeneration fuel nozzle 9, processing controller 10。
Specific embodiment
The present invention is described in further detail with specific embodiment for explanation with reference to the accompanying drawing.
Referring to Fig. 1 to Fig. 3, a kind of diesel SCR catalytic device sulfur poisoning cancellation element, including engine 1, turbocharger 2, oxidation catalytic converter DOC3, particulate matter trap DPF4, SCR catalyst 5, the inlet end of the DOC3 pass sequentially through air inlet Pipeline 31, turbocharger 2 are connected to the exhaust pipe 11 of engine 1, and the exhaust end of DOC3 passes through DPF4 and 5 phase of SCR catalyst It is logical, and No.1 temperature sensor 61, No.1 NO are provided on air inlet pipeline 31XThe inlet and outlet end of sensor 62, DPF4 is respectively provided with There is pressure sensor 63, the inlet and outlet end of SCR catalyst 5 is respectively arranged with 64, No. two NO of No. two temperature sensorsXSensor 65；
The system also includes bypass line 7, dpf regeneration fuel nozzle 9, the inlet and outlet end of the bypass line 7 is distinguished It is communicated with exhaust pipe 11, air inlet pipeline 31, electric controlled regulating valve 8 is provided on bypass line 7, the dpf regeneration fuel nozzle 9 is set It sets on air inlet pipeline 31, and No.1 temperature sensor 61, No.1 NOX63, No. two sensor 62, pressure sensor temperature sensing 64, No. two NO of deviceXSensor 65, electric controlled regulating valve 8, dpf regeneration fuel nozzle 9 are connect with 10 signal of aftertreatment controller.
The SCR catalyst 5 is copper-based zeolite type SCR.
A kind of application method of diesel SCR catalytic device sulfur poisoning cancellation element, successively the following steps are included:
S1: the aftertreatment controller 10 is according to No.1 NOX62, No. two NO of sensorXThe detection data of sensor 65, vehicle Operating range, fuel consumption and last time eliminate sulfur poisoning judge whether to need to eliminate with the running time of rear vehicle The sulfur poisoning of SCR catalyst 5, if desired, enter step S2；
S2: detection data of the aftertreatment controller 10 based on pressure sensor 63, carbon carrying capacity calculate, limit carbon carrying capacity Setting value judges whether DPF4 needs to regenerate, if desired, enters step S4, S3 is entered step if not needing；
S3: implement exhaust gas bypass control to enter step S6 after eliminating sulfur poisoning；
S4: the aftertreatment controller 10 is sprayed according to the detection data control dpf regeneration fuel oil of No. two temperature sensors 64 Mouth 9 sprays fuel oil into air inlet pipeline 31, to realize the initiative regeneration of DPF, and removes the sulphur in SCR catalyst 5；
S5: the aftertreatment controller 10 judges whether dpf regeneration is completed, if completing, enters step S6, if not completing It is again introduced into step S4；
S6: the aftertreatment controller 10 judges whether the sulfur poisoning of SCR catalyst 5 has been removed, if not removing again Enter step S1；
Wherein, implementation exhaust gas bypass control to eliminate sulfur poisoning successively the following steps are included:
S31: the aftertreatment controller 10 judges whether diesel engine is located according to the detection data of No.1 temperature sensor 61 In high temperature, high air-fuel ratio operating condition, if so, S34 is entered step, if it is not, then entering step S32；
S32: the aftertreatment controller 10 judges whether the sulphur accumulated time of SCR catalyst 5 and SCR conversion efficiency decline To limiting value, if so, S33 is entered step, if it is not, being then again introduced into step S31；
S33: the aftertreatment controller 10 is sprayed according to the detection data control dpf regeneration fuel oil of No. two temperature sensors 64 Mouth 9 sprays fuel oil into air inlet pipeline 31 to remove the sulphur in SCR catalyst 5；
S34: the aftertreatment controller 10 controls electric controlled regulating valve 8 according to the detection data of No. two temperature sensors 64 Aperture makes the inlet temperature of SCR catalyst 5 reach 500~550 DEG C, to remove the sulphur in SCR catalyst 5.
The principle of the present invention is described as follows:
The present invention provides one kind by Europe VI post-processing catalyst converter group, bypass line 7, dpf regeneration fuel nozzle 9, sensing The after-treatment system that device group, aftertreatment controller 10 form, wherein dpf regeneration fuel nozzle 9 is used to need actively again in DPF4 Appropriate fuel oil is sprayed into air inlet pipeline 31 when raw, to meet the temperature requirement of 5 desulfurization of SCR catalyst；Bypass line 7 is used for will Partial engine exhaust is directly bypassed in air inlet pipeline 31 without turbocharger, guarantees engine in high speed, middle height Load condition delivery temperature is able to ascend to 500 DEG C or more, to meet the high temperature requirement of desulfurization；Aftertreatment controller 10 is used for root According to the electric controlled regulating valve 8 in sensor signal and control algolithm control dpf regeneration fuel nozzle 9 and bypass line 7.Its specific work It is as follows to make process:
When 5 sulfur poisoning of SCR catalyst occurs for diesel engine, while DPF4 needs to regenerate, aftertreatment controller 10 is according to two The feedback signal control dpf regeneration fuel nozzle 9 of number temperature sensor 64 sprays suitable fuel oil into air inlet pipeline 31, fuel oil By the regeneration that DOC3 heating makes delivery temperature be increased to 550 DEG C or so so as to DPF4, while realizing the desulfurization of SCR catalyst 5；
When 5 sulfur poisoning of SCR catalyst occurs for diesel engine, DPF4 does not need to regenerate, and diesel engine runs on high temperature, high air-fuel When than operating condition, aftertreatment controller 10 is opened according to the feedback signal control electric controlled regulating valve 8 of No. two temperature sensors 64, by portion Point engine exhaust is introduced directly into air inlet pipeline 31, so that the inlet temperature of SCR catalyst 5 is controlled at 500~550 DEG C, from And realize the high temperature desulfurizing of SCR catalyst；
When 5 sulfur poisoning of SCR catalyst occurs for diesel engine, DPF4 does not need to regenerate, but diesel engine not running is in high temperature, high-altitude When combustion is than operating condition, aftertreatment controller 10 is sprayed according to the feedback signal control dpf regeneration fuel nozzle 9 of No. two temperature sensors 64 Suitable fuel oil is penetrated into air inlet pipeline 31, realizes the regeneration of DPF4 and the desulfurization of SCR catalyst 5.
Embodiment 1:
Referring to Fig. 1 to Fig. 3, a kind of diesel SCR catalytic device sulfur poisoning cancellation element, including engine 1, turbocharger 2, oxidation catalytic converter DOC3, particulate matter trap DPF4, SCR catalyst 5, bypass line 7, dpf regeneration fuel nozzle 9, The inlet end of the DOC3 passes sequentially through air inlet pipeline 31, turbocharger 2 is connected to the exhaust pipe 11 of engine 1, DOC3's Exhaust end is communicated by DPF4 with SCR catalyst 5, and the SCR catalyst 5 is copper-based zeolite type SCR, the bypass line 7 Inlet and outlet end is communicated with exhaust pipe 11, air inlet pipeline 31 respectively, and dpf regeneration fuel nozzle 9, one is provided on air inlet pipeline 31 Number temperature sensor 61, No.1 NOXSensor 62, the inlet and outlet end of DPF4 are provided with pressure sensor 63, SCR catalyst 5 Inlet and outlet end be respectively arranged with 64, No. two NO of No. two temperature sensorsXSensor 65 is provided with automatically controlled tune on bypass line 7 Save valve 8, and No.1 temperature sensor 61, No.1 NOXSensor 62, the temperature sensor 64, two of pressure sensor 63, two NOX Sensor 65, electric controlled regulating valve 8, dpf regeneration fuel nozzle 9 are connect with 10 signal of aftertreatment controller.
The application method of the diesel SCR catalytic device sulfur poisoning cancellation element successively follows the steps below:
S1: the aftertreatment controller 10 is according to No.1 NOX62, No. two NO of sensorXThe detection data of sensor 65, vehicle Operating range, fuel consumption and last time eliminate sulfur poisoning judge whether to need to eliminate with the running time of rear vehicle The sulfur poisoning of SCR catalyst 5, if desired, enter step S2；
S2: detection data of the aftertreatment controller 10 based on pressure sensor 63, carbon carrying capacity calculate, limit carbon carrying capacity Setting value judges whether DPF4 needs to regenerate, if desired, enters step S4, S3 is entered step if not needing；
S3: implementing exhaust gas bypass control to eliminate and enter step S6 after sulfur poisoning, and the implementations exhaust gas bypass control is specifically Are as follows:
S31: the aftertreatment controller 10 judges whether diesel engine is located according to the detection data of No.1 temperature sensor 61 In high temperature, high air-fuel ratio operating condition, if so, S34 is entered step, if it is not, then entering step S32；
S32: the aftertreatment controller 10 judges whether the sulphur accumulated time of SCR catalyst 5 and SCR conversion efficiency decline To limiting value, if so, S33 is entered step, if it is not, being then again introduced into step S31；
S33: the aftertreatment controller 10 is sprayed according to the detection data control dpf regeneration fuel oil of No. two temperature sensors 64 Mouth 9 sprays fuel oil into air inlet pipeline 31 to remove the sulphur in SCR catalyst 5；
S34: the aftertreatment controller 10 controls electric controlled regulating valve 8 according to the detection data of No. two temperature sensors 64 Aperture makes the inlet temperature of SCR catalyst 5 reach 500~550 DEG C, to remove the sulphur in SCR catalyst 5；
S4: the aftertreatment controller 10 is sprayed according to the detection data control dpf regeneration fuel oil of No. two temperature sensors 64 Mouth 9 sprays fuel oil into air inlet pipeline 31, to realize the initiative regeneration of DPF, and removes the sulphur in SCR catalyst 5；
S5: the aftertreatment controller 10 judges whether dpf regeneration is completed, if completing, enters step S6, if not completing It is again introduced into step S4；
S6: the aftertreatment controller 10 judges whether the sulfur poisoning of SCR catalyst 5 has been removed, if not removing again Enter step S1.

Claims (3)

1. a kind of diesel SCR catalytic device sulfur poisoning cancellation element, including engine (1), turbocharger (2), oxidation catalysis Converter DOC(3), particulate matter trap DPF(4), SCR catalyst (5), the DOC(3) inlet end pass sequentially through air inlet pipe Road (31), turbocharger (2) are connected to the exhaust pipe (11) of engine (1), DOC(3) exhaust end pass through DPF(4) and SCR Catalyst converter (5) communicates, and No.1 temperature sensor (61), No.1 NO are provided on air inlet pipeline (31)XSensor (62), DPF (4) inlet and outlet end is provided with pressure sensor (63), and the inlet and outlet end of SCR catalyst (5) is respectively arranged with No. two temperature Spend sensor (64), No. two NOXSensor (65), it is characterised in that:
Described device further includes bypass line (7), dpf regeneration fuel nozzle (9), the inlet and outlet end point of the bypass line (7) It is not communicated with exhaust pipe (11), air inlet pipeline (31), electric controlled regulating valve (8), the dpf regeneration is provided on bypass line (7) Fuel nozzle (9) is arranged on air inlet pipeline (31), and No.1 temperature sensor (61), No.1 NOXSensor (62), pressure pass Sensor (63), No. two temperature sensors (64), No. two NOXSensor (65), electric controlled regulating valve (8), dpf regeneration fuel nozzle (9) it is connect with aftertreatment controller (10) signal；
The application method of described device successively the following steps are included:
S1: the aftertreatment controller (10) is according to No.1 NOXSensor (62), No. two NOXThe detection data of sensor (65), Operating range, fuel consumption and the last time of vehicle eliminate sulfur poisoning and judge whether to need to disappear with the running time of rear vehicle Except the sulfur poisoning of SCR catalyst (5), if desired, enter step S2；
S2: the aftertreatment controller (10) is based on the detection data of pressure sensor (63), carbon carrying capacity calculates, limit carbon carrying capacity Setting value judges DPF(4) whether need to regenerate, if desired, S4 is entered step, S3 is entered step if not needing；
S3: implement exhaust gas bypass control to enter step S6 after eliminating sulfur poisoning；
S4: the aftertreatment controller (10) is sprayed according to the detection data control dpf regeneration fuel oil of No. two temperature sensors (64) Mouth (9) sprays fuel oil into air inlet pipeline (31), to realize the initiative regeneration of DPF, and removes the sulphur in SCR catalyst (5)；
S5: the aftertreatment controller (10) judges whether dpf regeneration is completed, if completing, enters step S6, if not completing again It is secondary to enter step S4；
S6: the aftertreatment controller (10) judges whether the sulfur poisoning of SCR catalyst (5) has been removed, if not removing again Enter step S1.
2. a kind of diesel SCR catalytic device sulfur poisoning cancellation element according to claim 1, it is characterised in that: the SCR Catalyst converter (5) is copper-based zeolite type SCR.
3. a kind of application method of diesel SCR catalytic device sulfur poisoning cancellation element as described in claim 1, feature exist In:
In step S3, implementation exhaust gas bypass control to eliminate sulfur poisoning successively the following steps are included:
S31: the aftertreatment controller (10) judges whether diesel engine is located according to the detection data of No.1 temperature sensor (61) In high temperature, high air-fuel ratio operating condition, if so, S34 is entered step, if it is not, then entering step S32；
S32: the aftertreatment controller (10) judges whether the sulphur accumulated time of SCR catalyst (5) and SCR conversion efficiency decline To limiting value, if so, S33 is entered step, if it is not, being then again introduced into step S31；
S33: the aftertreatment controller (10) is sprayed according to the detection data control dpf regeneration fuel oil of No. two temperature sensors (64) Mouth (9) sprays fuel oil into air inlet pipeline (31) to remove the sulphur in SCR catalyst (5)；
S34: the aftertreatment controller (10) controls electric controlled regulating valve (8) according to the detection data of No. two temperature sensors (64) Aperture, so that the inlet temperature of SCR catalyst (5) is reached 500~550 DEG C, to remove the sulphur in SCR catalyst (5).
CN201610963752.7A 2016-10-28 2016-10-28 Sulfur poisoning eliminating device for SCR (selective catalytic reduction) catalyst of diesel engine and using method of sulfur poisoning eliminating device Active CN106401704B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610963752.7A CN106401704B (en) 2016-10-28 2016-10-28 Sulfur poisoning eliminating device for SCR (selective catalytic reduction) catalyst of diesel engine and using method of sulfur poisoning eliminating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610963752.7A CN106401704B (en) 2016-10-28 2016-10-28 Sulfur poisoning eliminating device for SCR (selective catalytic reduction) catalyst of diesel engine and using method of sulfur poisoning eliminating device

Publications (2)

Publication Number Publication Date
CN106401704A CN106401704A (en) 2017-02-15
CN106401704B true CN106401704B (en) 2019-01-04

Family

ID=58013908

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610963752.7A Active CN106401704B (en) 2016-10-28 2016-10-28 Sulfur poisoning eliminating device for SCR (selective catalytic reduction) catalyst of diesel engine and using method of sulfur poisoning eliminating device

Country Status (1)

Country Link
CN (1) CN106401704B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107328893A (en) * 2017-06-23 2017-11-07 东风商用车有限公司 Gas buffer for improving measurement accuracy of NOx of engine
CN109707494B (en) * 2018-12-28 2020-04-24 潍柴动力股份有限公司 Treatment method and device for post-treatment of sulfur poisoning
CN110630361B (en) * 2019-09-20 2021-02-05 东风商用车有限公司 SCR efficiency recovery control method
CN110700926B (en) * 2019-11-25 2022-04-29 东风商用车有限公司 Control method for realizing SCR desulfurization regeneration
CN110925061B (en) * 2019-11-29 2021-04-16 安徽江淮汽车集团股份有限公司 Engine exhaust temperature lifting device and engine exhaust temperature control method
CN111140319B (en) * 2019-12-31 2021-03-16 潍柴动力股份有限公司 Desulfurization control method and device, storage medium and electronic equipment
CN112696251A (en) * 2020-12-29 2021-04-23 潍柴动力股份有限公司 SCR conversion efficiency recovery method and device and vehicle
CN113047924B (en) * 2021-03-04 2022-07-15 广西玉柴机器股份有限公司 Treatment method and system for diesel engine catalyst
CN113027581B (en) * 2021-03-31 2022-01-25 潍柴动力股份有限公司 Method and device for detecting sulfur poisoning of SCR (Selective catalytic reduction) catalyst
CN113431664A (en) * 2021-07-21 2021-09-24 广西优艾斯提传感技术有限公司 Engine tail gas treatment system
CN113482749A (en) * 2021-08-02 2021-10-08 无锡伟博汽车科技有限公司 Method for improving SCR conversion efficiency
CN113700541B (en) * 2021-09-23 2023-01-20 潍柴动力股份有限公司 Method and device for desulfurization regeneration of catalytic unit of engine SCR system
CN114592950A (en) * 2022-02-24 2022-06-07 上海和夏骏智科技有限公司 SCR (Selective catalytic reduction) failure active treatment method based on DPF active regeneration and SCR failure control device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110283678A1 (en) * 2010-05-19 2011-11-24 GM Global Technology Operations LLC Method for controlling injection of diesel exhaust fluid into an exhaust pipe of an internal combustion engine
CN103806994A (en) * 2014-01-22 2014-05-21 东风商用车有限公司 Intelligent exhaust temperature raising system for supercharged diesel engine
CN104271909A (en) * 2012-05-03 2015-01-07 斯堪尼亚商用车有限公司 Method for detecting sulphur poisoning in an exhaust treatment system
CN204327283U (en) * 2014-11-17 2015-05-13 潍柴动力股份有限公司 A kind of vehicular engine
CN105370355A (en) * 2015-12-16 2016-03-02 潍柴动力股份有限公司 Desulfurization controlling mode for SCR system
CN206175032U (en) * 2016-10-28 2017-05-17 东风商用车有限公司 Sulfur poisoning eliminating device for SCR (selective catalytic reduction) catalyst of diesel engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6163996B2 (en) * 2013-09-18 2017-07-19 いすゞ自動車株式会社 Diagnostic equipment

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110283678A1 (en) * 2010-05-19 2011-11-24 GM Global Technology Operations LLC Method for controlling injection of diesel exhaust fluid into an exhaust pipe of an internal combustion engine
CN104271909A (en) * 2012-05-03 2015-01-07 斯堪尼亚商用车有限公司 Method for detecting sulphur poisoning in an exhaust treatment system
CN103806994A (en) * 2014-01-22 2014-05-21 东风商用车有限公司 Intelligent exhaust temperature raising system for supercharged diesel engine
CN204327283U (en) * 2014-11-17 2015-05-13 潍柴动力股份有限公司 A kind of vehicular engine
CN105370355A (en) * 2015-12-16 2016-03-02 潍柴动力股份有限公司 Desulfurization controlling mode for SCR system
CN206175032U (en) * 2016-10-28 2017-05-17 东风商用车有限公司 Sulfur poisoning eliminating device for SCR (selective catalytic reduction) catalyst of diesel engine

Also Published As

Publication number Publication date
CN106401704A (en) 2017-02-15

Similar Documents

Publication Publication Date Title
CN106401704B (en) Sulfur poisoning eliminating device for SCR (selective catalytic reduction) catalyst of diesel engine and using method of sulfur poisoning eliminating device
CN206175032U (en) Sulfur poisoning eliminating device for SCR (selective catalytic reduction) catalyst of diesel engine
US7810316B2 (en) Apparatus, system, and method for exhaust aftertreatment efficiency enhancement
CN110671177B (en) DPF regeneration method and device
US20110167801A1 (en) Method for Operating an Exhaust Emission Control System Having a SCR-Catalyst and an Upstream Oxidation Catalyst Exhaust Emission Control Component
US20150247437A1 (en) SYSTEMS AND METHODS FOR NOx REDUCTION AND AFTERTREATMENT CONTROL USING PASSIVE NOx ADSORPTION
CN104481646A (en) Regeneration control system and method for diesel particulate filter (DPF) diesel particle filtering system
CN103883380A (en) Method and system for controlling exhaust gas temperature of engine
CN102365433B (en) Method for operating components for exhaust gas after-treatment and exhaust gas after-treatment apparatus
US8850799B2 (en) Exhaust purification apparatus for engine
CN209892306U (en) Exhaust temperature lifting device and tail gas treatment device
US11346266B2 (en) Engine exhaust aftertreatment device and method
WO2013001311A1 (en) Method and apparatus for controlling the operation of a turbocharged internal combustion engine
CN109595069B (en) Device and method for improving DOC regeneration efficiency
US9228468B2 (en) Targeted regeneration of a catalyst in an aftertreatment system
EP2402570A1 (en) Exhaust cleaner for internal combustion engine
CN203925695U (en) The control system of engine exhaust temperature
CN1930380B (en) Exhaust purifying apparatus for internal combustion engine
CN107208521B (en) The exhaust gas cleaning method of the exhaust gas cleaning system of internal combustion engine, internal combustion engine and internal combustion engine
US20080209894A1 (en) Method For Regeneration Of An Exhaust Aftertreatment System
CN214092020U (en) Automobile exhaust aftertreatment system and automobile
JP2005307746A (en) Exhaust emission control device
CN114635775A (en) DOC performance detection method and system for diesel engine
WO2017130408A1 (en) Exhaust purification device
JP2017044120A (en) Exhaust emission control device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant