CN106014563A - Diesel engine tail gas after-treatment system and heating control method - Google Patents
Diesel engine tail gas after-treatment system and heating control method Download PDFInfo
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- CN106014563A CN106014563A CN201610583819.4A CN201610583819A CN106014563A CN 106014563 A CN106014563 A CN 106014563A CN 201610583819 A CN201610583819 A CN 201610583819A CN 106014563 A CN106014563 A CN 106014563A
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- urea
- temperature
- tail gas
- treatment system
- heating
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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
- F01N3/24—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
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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
- 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
- F01N2390/00—Arrangements for controlling or regulating exhaust apparatus
- F01N2390/02—Arrangements for controlling or regulating exhaust apparatus using electric components only
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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
- 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
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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
- 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
- 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
- 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
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- 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
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention provides a diesel engine tail gas after-treatment system. The diesel engine tail gas after-treatment system comprises a SCR catalyst, a urea pump, a urea tank, a urea nozzle, a control unit, a temperature sensor and a nitric oxide sensor, and further comprises a waste gas temperature adjusting device for heating control of the temperature of exhausted tail gas; the urea pump is integrated on the urea tank, and is connected with the urea nozzle through a urea solution pipeline; and the urea nozzle is mounted on an exhaust pipe. The diesel engine tail gas after-treatment system is provided with the waste gas temperature adjusting device, and is provided with an internal heating body for heating the tail gas to keep the temperature of the tail gas in a set range so as to always keep the catalytic reaction efficiency on a higher level. The diesel engine tail gas after-treatment system can output different heating powers for different working conditions to realize instant and different active control of the exhaust temperature so as to adapt to the demands on different working condition points through controlling such parameters as the electrifying time and frequency of the heating body.
Description
Technical field
The invention belongs to Diesel engine control field, especially relates to a kind of diesel motor exhaust
After-treatment system and method for heating and controlling.
Background technology
At present, commercial car many lift-launchs Diesel engine, SCR (being called for short SCR) technology is
Realize exhaust emissions of diesel engine and reach the mainstream technology route of state V and above regulation, SCR system basic
Operation principle, is to spray in the exhaust pipe of engine by nozzle by aqueous solution of urea, to bavin in catalyst converter
NO in oil machine tail gasXDecompose, generate N2And H2O.SCR system generally includes aqueous solution of urea
The main devices such as metering supplying module, control unit and catalyst converter.
But, owing to SCR catalyst activity at different temperatures is different, under too low exhaust temperature,
The catalytic conversion efficiency influence of NOx is relatively big, and at present, the scheme of reply worst cold case mostly is use
DOC (oxidizing catalytic device) so that NO and NO in tail gas NOx2Ratio change, i.e. increase
Add NO2Ratio to realize the raising of reaction efficiency under low temperature.DOC scheme is to each different operating points
Adaptability cannot accomplish that equilibrium, oxidation generate NO2Total amount uncertain, NO under low temperature can be causedxConversion
Efficiency can not be precisely controlled.
Summary of the invention
In view of this, the invention is directed to a kind of diesel motor exhaust after-treatment system, with reality
Existing exhaust emissions of diesel engine reaches state's V laws and regulations requirement, especially improves in the case of relatively low at exhaust temperature
The efficiency of catalytic reaction.
For reaching above-mentioned purpose, the technical scheme of the invention is achieved in that
A kind of diesel motor exhaust after-treatment system, including the SCR catalyst being arranged in discharge duct,
Temperature sensor, NOx sensor, for realize urea liquid injection urea pump, urea tank,
Urea nozzle, for controlling the control unit of urea liquid injection.
Also include the EGT adjusting means being arranged on SCR catalyst front end, for emission temperature
Degree carries out computer heating control；
Described urea pump is integrated in urea tank, connects urea nozzle, described urine by urea liquid pipeline
Element nozzle is arranged on exhaustor, is arranged between EGT adjusting means and SCR catalyst；
Described EGT adjusting means, urea pump, urea nozzle, temperature sensor, nitrogen oxides pass
Sensor is all connected by wirning harness with described control unit；
Being provided with heater in described urea liquid pipeline, described heater connects described control unit.
Further, in described EGT adjusting means, it is provided with heater, for tail gas is heated.
Further, it is provided with heater strip in described heater.
Further, described urea tank is contained within liquid collecting tank, and described urea pump is provided with and can accommodate liquid collecting
The hatch frame of tank liquid outlet, is provided with sealing ring between described urea pump and described liquid collecting tank.
Relative to prior art, a kind of diesel motor exhaust after-treatment system described in the invention
Have the advantage that the invention by arranging EGT adjusting means, by built-in heating
Tail gas is heated by body, and holding exhaust temperature is in the range of setting, so that the effect of catalytic reaction
Rate remains in higher level.
The urea pump that native system uses, is directly integrated in urea tank top, eliminates urea tank and carbamide
Urea pipe between pump, decreases disclosure risk, increases reliability；Simultaneously as carbamide is water-soluble
The shortening of liquid passage total length, for pump found a capital pressure stablize and suction capactity have greatly improved.
Exhaust gas aftertreatment system described in the invention is applicable to state's V discharge standard.
The another object of the invention is to propose a kind of controlling party for the heating of emission temperature
Method, to realize the control of the active instant, diversity to delivery temperature, with adaptive system to difference
The demand of operating point.
For reaching above-mentioned purpose, the technical scheme of the invention is achieved in that
A kind of emission temperature method for heating and controlling, comprises the steps:
(1) target temperature value that catalytic reaction needs is set；
(2) actual temperature in estimation course of reaction；
(3) difference utilizing target temperature and actual estimated temperature calculates through pid algorithm, draws PWM
The Duty ratio control amount controlled, is modified P term coefficient simultaneously, carries out computer heating control.
Further, described step (2) specifically includes following steps:
(1) temperature sensor being arranged in exhaustor is utilized to gather temperature signal in exhaustor；
(2) delivery temperature of the signal estimation SCR catalytic reaction position gathered according to temperature sensor；
(3) gather ambient temperature signal, by stand and vehicle test, draw correction factor MAP；
(4) use ambient temperature that this MAP is tabled look-up, draw correction factor, revise aerofluxus actual
Estimated temperature.
Relative to prior art, a kind of emission temperature method for heating and controlling tool described in the invention
Have a following advantage: the invention by heater conduction time, the isoparametric control of frequency, for
Different operating modes can export different heating powers, it is achieved instant, the master of diversity to delivery temperature
Dynamic control, with the adaptive system demand to different operating points.
Accompanying drawing explanation
The accompanying drawing of the part constituting the invention is used for providing being further appreciated by the invention,
The schematic description and description of the invention is used for explaining the invention, is not intended that this
The improper restriction of bright creation.In the accompanying drawings:
Fig. 1 is the structure of a kind of diesel motor exhaust after-treatment system described in the invention embodiment
Schematic diagram；
Fig. 2 is the urea tank described in the invention embodiment and urea pump connection diagram；
Accompanying drawing is described as follows
1-control unit, 2-urea pump, 3-urea tank, 31-liquid collecting tank, 4-urea nozzle, 5-waste gas
Temperature-adjusting device, 6-temperature sensor, 7-NOx sensor, 8-Engine ECU；9-SCR
Catalyst converter.
Detailed description of the invention
It should be noted that in the case of not conflicting, in embodiment in the invention and embodiment
Feature can be mutually combined.
In the description of the invention, it is to be understood that term " " center ", " longitudinally ", " horizontal stroke
To ", " on ", D score, "front", "rear", "left", "right", " vertically ", " water
Flat ", the orientation that indicates of " top ", " end ", " interior ", " outward " etc. or position relationship be based on attached
Orientation shown in figure or position relationship, be for only for ease of description the invention and simplify description, and not
Be instruction or the hint device of indication or element must have specific orientation, with specific azimuth configuration and
Operation, therefore it is not intended that restriction to the invention.Additionally, term " first ", " second "
Etc. being only used for describing purpose, and it is not intended that instruction or hint relative importance or implicit indicate indication
The quantity of the technical characteristic shown.Thus, the feature defining " first ", " second " etc. can be expressed
Or implicitly include one or more this feature.In the description of the invention, unless otherwise
Illustrating, " multiple " are meant that two or more.
In the description of the invention, it should be noted that unless otherwise clearly defined and limited,
Term " is installed ", " being connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing,
Can also be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；
Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be the company of two element internals
Logical.For the ordinary skill in the art, can understand that above-mentioned term is at this by concrete condition
Concrete meaning in innovation and creation.
Describe the invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As it is shown in figure 1, control unit 1 communicates with Engine ECU 8 and sensor, according to starting
The rotating speed of machine, moment of torsion, the operating mode amount of the transient state such as delivery temperature, control urea pump 2 and urea nozzle 4,
Realize being accurately controlled the emitted dose of aqueous solution of urea.
Urea tank 3 is used for storing aqueous solution of urea, internal containing liquid level and temperature sensor.Native system is adopted
Urea tank 3 containing internal liquid collecting tank 31, in the case of low liquid level, still ensure that imbibition is not jolted
Impact, thus avoid bubble enter the inefficacy that causes of urea pump 2 and measure the situations such as inaccurate；Meanwhile,
In the case of low temperature freezes, the local heating in the range of liquid collecting tank 31, compare more overall adding
Heat in hgher efficiency, thawing time is shorter, attachment structure figure such as Fig. 2 institute of urea tank 3 and urea pump 2
Showing, urea pump 2 is provided with the hatch frame that can accommodate liquid collecting tank 31 liquid outlet, described urea pump 2
And it is provided with sealing ring between described liquid collecting tank 31.
Urea pump 2 is used for the aqueous solution of urea in urea tank 3 is transported to urea nozzle 4, and at pipeline
Expulsion pressure required for inside ensuring.The urea pump 2 that native system uses, is directly integrated in urea tank 3
Top, eliminates the urea pipe between urea tank 3 and urea pump 2, decreases disclosure risk, increases
Reliability.Simultaneously as the shortening of aqueous solution of urea passage total length, pressure is built for pump and stablizes and take out
Energy-absorbing power all has greatly improved.
Urea nozzle 4 is arranged on exhaustor, for by aqueous solution of urea jet atomization.
Urea liquid pipe route control unit 1 between urea pump 2 and urea nozzle 4 directly controls heating
State, when temperature less than a certain temperature time, control unit 1 i.e. begins to warm up, the temperature begun to warm up by
According to the impact on heat transfer of the space structure of different vehicle, set different calibration values, to adapt to multiple car
Installation coupling.It is provided with heater strip in urea liquid pipeline, connects control unit, by control unit pair
Heater strip carries out electrified regulation.
EGT adjusting means 5 is mainly made up of heater, heater skeleton and conductive structure three part.
In the case of relatively low, by heater and conductive structure, tail gas is heated at exhaust temperature ratio, keep
Exhaust temperature is in the range of setting, so that the efficiency of catalytic reaction remains in higher level.
By to heater conduction time, the isoparametric control of frequency, exporting different for different operating modes
Heating power, it is achieved the active instant, diversity to delivery temperature controls, with adaptive system to not
Demand with operating point.The method that exhaust temperature carries out computer heating control is as follows:
Owing to SCR catalytic reaction is within the scope of specific temperature, there is an optimal effect, and the temperature of aerofluxus
It is unable to reach this specific range of temperatures under some conditions, therefore introduces this heating function.
In gas exhaust piping, it is provided with temperature sensor 6 in system, exhaust temperature signal can be gathered, at platform
Frame timing signal accurately estimates the aerofluxus temperature of SCR catalytic reaction position according to the signal of temperature sensor collection
Degree.For different automobile types, the temperature sensor position of different exhaust structure, Bench calibration can be carried out
Mate.
System can collect ambient temperature signal from car load atmosphere temperature transducer, is tried by stand and car load
Test, draw correction factor MAP；Use ambient temperature that this MAP is tabled look-up, draw correction factor,
Revise the actual estimated temperature of aerofluxus.
Heating process uses PWM to control, and can realize variable power control.
Temperature controls to use classical PID control theory, utilizes the difference of target temperature and actual estimated temperature
It is worth and calculates through pid algorithm, draw the Duty ratio control amount that PWM controls；Meanwhile, in pid algorithm
P term coefficient, (gas flow rate is according to electromotor MAP in correction to use the gas flow rate in exhaustor to carry out tabling look-up
Characteristic draws), optimize PID response speed, thus be accurately controlled actual estimated temperature and reach mesh as early as possible
Mark temperature, improves the response speed of system.
SCR catalyst 9 is the NH that aqueous solution of urea hydrolysis generates3Occur chemistry anti-with the NOx in tail gas
The place answered, on catalyst converter carrier under the catalytic action of coating, ultimately generates N2And H2O, is discharged into
In air.Native system is by controlling the dutycycle that urea nozzle 4 is opened, to the carbamide sprayed in exhaustor
Aqueous solution can mate accurately and control, to avoid unreacted NH completely3It is discharged in air
The secondary pollution become.
Temperature sensor 6 obtains the gas transient temperature in exhaustor in real time, is placed on SCR catalyst
Front end, it is also possible to be placed in SCR catalyst rear end, it is possible to make in SCR catalyst front and back ends position
By the scheme of dual sensor, in order to be applicable to various engines and the design of vehicle and coupling.
NOx sensor 7 is to the monitoring of NOx content in the gas after processing, and Real-time Feedback gives control
Unit 1 processed.
The invention utilizes control unit 1 to communicate with Engine ECU 8, it is thus achieved that real-time the turning of electromotor
The information such as speed, moment of torsion, oil consumption, intake and exhaust flow, by temperature sensor 6 and NOx sensor
7 gather the temperature in exhaustor and nitrous oxides concentration, thus control urea pump 2 and operate, by carbamide
Aqueous solution is transported to urea nozzle 4 from urea tank 3.Front row is worked as according to fed back by temperature sensor 6
Temperature, and the NOx content of this operating mode of electromotor, spray in exhaustor required for being calculated
The quantity of aqueous solution of urea, then by the unlatching of Duty ratio control urea nozzle 4, thus realize basis
The operating point of different electromotors, accurate measurement injection aqueous solution of urea, meanwhile, passes through temperature sensor
6 gather EGT is sent to control unit 1, and control unit 1 utilizes useless according to the threshold range set
The temperature of tail gas is heated by temperature adjusting means 5, keep exhaust temperature set in the range of,
So that the efficiency of catalytic reaction remains in higher level.
The foregoing is only the preferred embodiment of the invention, not in order to limit present invention wound
Make, within all spirit in the invention and principle, any modification, equivalent substitution and improvement made
Deng, within should be included in the protection domain of the invention.
Claims (6)
1. a diesel motor exhaust after-treatment system, urges including the SCR being arranged in discharge duct
Change device, temperature sensor, NOx sensor, for realizing the urea pump of urea liquid injection, urine
Element tank, urea nozzle, for controlling the control unit of urea liquid injection, it is characterised in that:
Also include the EGT adjusting means being arranged on SCR catalyst front end, for emission temperature
Degree carries out computer heating control；
Described urea pump is integrated in urea tank, connects urea nozzle, described urine by urea liquid pipeline
Element nozzle is arranged on exhaustor, is arranged between EGT adjusting means and SCR catalyst；
Described EGT adjusting means, urea pump, urea nozzle, temperature sensor, nitrogen oxides pass
Sensor is all connected by wirning harness with described control unit；
Being provided with heater in described urea liquid pipeline, described heater connects described control unit.
A kind of diesel motor exhaust after-treatment system the most according to claim 1, its feature exists
In: it is provided with heater in described EGT adjusting means, for tail gas is heated.
A kind of diesel motor exhaust after-treatment system the most according to claim 1, its feature exists
In: it is provided with heater strip in described heater.
A kind of diesel motor exhaust after-treatment system the most according to claim 1, its feature exists
In: described urea tank is contained within liquid collecting tank, and described urea pump is provided with and can accommodate liquid collecting tank liquid outlet
Hatch frame, is provided with sealing ring between described urea pump and described liquid collecting tank.
5. an emission temperature method for heating and controlling, it is characterised in that: comprise the steps:
(1) target temperature value that catalytic reaction needs is set；
(2) actual temperature in estimation course of reaction；
(3) difference utilizing target temperature and actual estimated temperature calculates through pid algorithm, draws PWM
The Duty ratio control amount controlled, is modified P term coefficient simultaneously, carries out computer heating control.
A kind of emission temperature method for heating and controlling the most according to claim 5, its feature exists
Following steps are specifically included in: described step (2):
(1) temperature sensor being arranged in exhaustor is utilized to gather temperature signal in exhaustor；
(2) delivery temperature of the signal estimation SCR catalytic reaction position gathered according to temperature sensor；
(3) gather ambient temperature signal, by stand and vehicle test, draw correction factor MAP；
(4) use ambient temperature that this MAP is tabled look-up, draw correction factor, revise aerofluxus actual
Estimated temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610583819.4A CN106014563A (en) | 2016-07-19 | 2016-07-19 | Diesel engine tail gas after-treatment system and heating control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610583819.4A CN106014563A (en) | 2016-07-19 | 2016-07-19 | Diesel engine tail gas after-treatment system and heating control method |
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| CN106014563A true CN106014563A (en) | 2016-10-12 |
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| CN201610583819.4A Pending CN106014563A (en) | 2016-07-19 | 2016-07-19 | Diesel engine tail gas after-treatment system and heating control method |
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Cited By (16)
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|---|---|---|---|---|
| CN108150254A (en) * | 2017-12-29 | 2018-06-12 | 长春汽四环腾达油脂化工有限公司 | A kind of vehicle and its exhaust treatment system |
| WO2018107464A1 (en) * | 2016-12-16 | 2018-06-21 | 罗伯特·博世有限公司 | Exhaust gas aftertreatment system for diesel engine and method of detecting abnormal injection |
| CN108590827A (en) * | 2018-07-03 | 2018-09-28 | 广西玉柴机器股份有限公司 | The device and method of ternary catalyzing unit inlet temperature is controlled according to OBD monitoring efficiencies |
| CN109372616A (en) * | 2018-12-25 | 2019-02-22 | 长安大学 | A kind of diesel SCR emission reduction detecting and controlling system and control method |
| CN109372614A (en) * | 2018-11-15 | 2019-02-22 | 安徽安凯汽车股份有限公司 | A kind of engine exhaust emission after-treatment device being easily installed |
| CN109681297A (en) * | 2018-11-22 | 2019-04-26 | 江苏大学 | A kind of motor exhaust urea injection apparatus and its control method |
| CN111157049A (en) * | 2020-01-13 | 2020-05-15 | 北京理工大学 | System and method for rapidly evaluating aging performance of SCR (selective catalytic reduction) postprocessor of diesel vehicle |
| CN111980787A (en) * | 2019-05-24 | 2020-11-24 | 北京福田康明斯发动机有限公司 | Engine exhaust heat management method and system |
| CN112485008A (en) * | 2020-11-11 | 2021-03-12 | 中汽研汽车检验中心（天津）有限公司 | Aftertreatment temperature control device and method for diesel engine in-loop |
| CN113513397A (en) * | 2021-03-29 | 2021-10-19 | 广西玉柴机器股份有限公司 | Method for controlling thermal management system based on environmental change and engine controller |
| CN113756918A (en) * | 2021-09-23 | 2021-12-07 | 湖南道依茨动力有限公司 | Engine control method, engine control device and vehicle |
| CN113931723A (en) * | 2021-10-12 | 2022-01-14 | 河北工业大学 | Device and method for reducing urea crystallization of SCR system |
| CN114483262A (en) * | 2021-12-29 | 2022-05-13 | 潍柴动力股份有限公司 | Urea pump, and control method and control system for urea pump |
| CN114645770A (en) * | 2021-05-25 | 2022-06-21 | 长城汽车股份有限公司 | Protection control method and device for urea nozzle, electronic equipment and vehicle |
| CN117988954A (en) * | 2024-04-03 | 2024-05-07 | 江西五十铃汽车有限公司 | SCR low-temperature thawing system and method for vehicle-mounted urea |
| CN117988954B (en) * | 2024-04-03 | 2024-07-05 | 江西五十铃汽车有限公司 | SCR low-temperature thawing system and method for vehicle-mounted urea |
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