CN102162390B - Selective catalytic reduction system with multiple quantitative accurate injection function - Google Patents
Selective catalytic reduction system with multiple quantitative accurate injection function Download PDFInfo
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- CN102162390B CN102162390B CN2011101132593A CN201110113259A CN102162390B CN 102162390 B CN102162390 B CN 102162390B CN 2011101132593 A CN2011101132593 A CN 2011101132593A CN 201110113259 A CN201110113259 A CN 201110113259A CN 102162390 B CN102162390 B CN 102162390B
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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
- 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
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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
- 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
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Abstract
The invention discloses a selective catalytic reduction system with multiple quantitative accurate injection function, which is characterized in that an anti-freeze electric heating wire is arranged inside an AdBlue tank; heating switches are connected in parallel at the two ends of the electric heating wire; the heating switches are connected with an AdBlue tank controller; the AdBlue tank is connected with the AdBlue tank controller through an AdBlue liquid level sensor and an AdBlue temperature sensor; an AdBlue injector is connected with the AdBlue tank and the AdBlue tank controller through delivery pipelines; the AdBlue tank controller is connected with an engine electronic control unit through a pipeline; the engine electronic control unit is connected with a compressed air actuation unit; the compressed air actuation unit is connected with an air injector through an exhaust pipe; a catalytic converter is arranged on an engine exhaust pipe; a catalytic converter temperature sensor A and a catalytic converter temperature sensor B are arranged at the inlet and the outlet of the catalytic converter respectively; and the temperature sensors A and B are both arranged on the engine exhaust pipe. The selective catalytic reduction system has a simple and compact structure and does not need the AdBlue liquid return pipeline or the pressure regulating system.
Description
Technical field
The present invention propose a kind of in the exhaust NOx belong in the motor car engine field as the vehicle-mounted SCR of variable measures accurate multi-injection after-treatment system, satisfied the auxiliary requirement of the environmental protection of Europe more than 4.
Background technique
Diesel engine is owing to having petrol engine incomparable advantage, particularly CO aspect power character, Economy and the reliability
2Discharge amount is low especially, so its purposes is promoted greatly, the occupancy of diesel-powered car on market is greatly improved.NOx and PM (particulate matter) are that two kinds of diesel engine mainly discharge pollutants, and mutual conflicting generation relation is arranged between the two.Only rely at present the optimization of combustion system can't satisfy the emission request of increasingly stringent.Realize that Europe IV to NOx and the lower requirement of PM, roughly has two machine after-purification technology paths at present: the one, first by Optimizing Combustion, re-use selective catalytic reduction SCR (selective catalytic reduction) and reduce the NOx discharging that produces because of burning optimization; The 2nd, EGR (EGR)+DPF (grain catcher) route namely first by the composition of the NOx in the EGR reduction discharging, captures the particulate matter that slightly increases because of use EGR with DPF again, thereby reaches the effect that reduces simultaneously NOx and PM.The SCR Technology Need installs " adding indigo plant " equipment onboard additional, but the SCR technology is insensitive to the sulphur in the fuel oil, and deduction also can make fuel economy improve 5%～7% after adding blue expense.Although the EGR+DPF technology does not need to add and do not add blue infrastructure device, need to use Low Sulfur Fuel Oil and fuel economy relatively poor, and it is less to make engine emission reach the possibility of Europe V and above standard.
SCR system basic functional principle: urea is mixed with proper proportion with water, spray in the waste gas of diesel engine discharge, make the NOx in the waste gas be reduced into harmless N
2(nitrogen) and H
2O (water vapour), its chemical equation is:
CO(NH
2)
2+H
2O→2NH
3+CO
2
4NH
3+2NO
2+O
2→3N
2+6H
2O↑
4NH
3+4NO
2+O
2→4N
2+6H
2O↑
Urea just can be hydrolyzed into ammonia and carbon dioxide at normal temperatures, in being higher than 300 ℃ environment, and NH
3(ammonia) and NOx rapidly reaction under the effect of catalyzer generate N
2(ammonia) and H
2O (water vapour).The delivery temperature of diesel engine generally in 300 ℃～500 ℃ scopes, has satisfied the required temperature conditions of NOx reduction.
The aqueous solution of urea of common commercial usefulness (mass fraction is 32.5%) becomes and adds indigo plant, it is nontoxic, clean, odorlessness, be difficult for catching fire, without explosion risk, the density under the normal temperature (20 ℃) is 1.09kg/m3, be alkalescence, its pH value is 8.8.Although the aqueous solution of urea of higher concentration can reduce the weight of vehicle, but the aqueous solution of urea of 32.5% mass fraction can provide minimum solidification point (11 ℃) in addition when the solution part is freezing, solution concentration does not change, so the aqueous solution of urea of usually selecting 32.5% mass fraction is as reactant.Must be kept under the temperature environment that is lower than 50 ℃ but add indigo plant, be decomposed avoiding.
Although SCR has many advantages, some problems still appear when promoting.Use the weight that not only will increase SCR device itself behind the general SCR to be about 150～300kg, also will increase by one and add blue case and add blue solution.Can consume the 5L liquid area aqueous solution when generally speaking, consuming the 100L fuel oil.Automobile runs 6000km and calculates, and the useful load of a car loss is about 350kg.The straying quatity of urea must be complementary with the concentration of NOx in addition, when guaranteeing to reduce NOx, can not guarantee to surpass certain metering.The straying quatity of urea is very few, does not reach due processing horizontal; Spray into too much, then can make unnecessary ammonia enter atmosphere, cause new pollution.So the calculating of the discharge capacity of NOx is most important.
In a word, the SCR system wants the problems such as the determining of discharge capacity, insulation, jet atomization of reasonable treatment S CR system equipment quality, motor NOx.
Summary of the invention
In order to address the above problem, the present invention proposes the SCR system that a kind of fixed quantity accurately sprays, and comprises the pressurized air performance element, adds blue tank, antifreeze electric heating wire, heater switch, adds blue temperature transducer, adds blue controller, temperature transducer A, temperature transducer B, catalyst converter, engine electronic control unit, air ejector, adds blue sparger.
Describedly add blue tank and be built-in with antifreeze electric heating wire, the electric heating wire two ends are parallel with heater switch.Heater switch with add blue controller and link to each other.Add blue tank respectively by adding blue liquid level sensor and adding blue temperature transducer and add blue controller and link to each other.Describedly add blue sparger and link to each other with adding blue tank and add blue controller by delivery line.Add blue controller and link to each other with engine electronic control unit by pipeline, engine electronic control unit links to each other with the pressurized air performance element, and the pressurized air performance element links to each other with air ejector by outlet pipe.Catalyst converter is installed on the engine exhaust pipe, and the entrance of catalyst converter and outlet port are separately installed with catalyst temperature sensor A and catalyst temperature sensor B, and temperature transducer A and temperature transducer B are installed on the engine exhaust pipe.
On the outlet pipe between engine electronic control unit and air ejector, also the NOx sensor can be installed, the NOx sensor with add blue controller and link to each other.Because the NOx sensor can accurately collect the NOx amount in the exhaust, therefore compare more accurate by engine electronic control unit control for the control of the emitted dose of adding blue solution, and treatment effect is better.
The invention has the advantages that:
1, mechanism and the structure of adding the injection of blue sparger employing fixed quantity that adopt among the present invention, the relative conventional spray method of control strategy is simpler;
2, add the effect that blue sparger has compression pump simultaneously among the present invention, make system architecture compacter thereby in this ejecting system, saved traditional blue pump that adds;
3, adding among the present invention only sucks the quantitative blue solution that adds in the blue sparger working procedure, do not need to add blue solution return line and voltage-regulating system, and SCR ejecting system pipeline structure is simplified.
Description of drawings
Fig. 1 is entire system structured flowchart of the present invention;
Fig. 2 is the link position partial enlarged drawing that adds blue sparger and air ejector among the present invention;
Fig. 3 sprays the link position partial enlarged drawing that prolongs pipeline, adds blue sparger and air ejector among the present invention;
Fig. 4 adds blue emitter construction schematic representation among the present invention;
Fig. 5 is the entire system structured flowchart that the NOx sensor is equipped with in the present invention.
Among the figure:
1-pressurized air performance element 2-adds the antifreeze electric heating 4-of blue tank 3-heater switch
5-adds blue temperature transducer 6-and adds blue liquid level sensor 67-and add blue controller 8-temperature transducer A
9-temperature transducer B 10-catalyst converter 11-engine electronic control system 12-air ejector
The unit
13-adds blue sparger 14-engine exhaust pipe 15-and sprays prolongation pipeline 16-NOx sensor
12a-case of sprayer 12b-adds blue inlet passage 12c-one-way valve A 12d-one-way valve B
12e-adds blue chamber 12f-and adds blue outer pipe 12g-piston 12h-biasing spring
12i-solenoid 12j-volute spring 12k-control chamber 12l-dunnage
12m-helical spring 12n-through hole
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, the SCR system that a kind of fixed quantity of the present invention accurately sprays comprises pressurized air performance element 1, adds blue tank 2, antifreeze electric heating wire 3, heater switch 4, adds blue temperature transducer 5, adds blue liquid level sensor 6, adds blue controller 7, temperature transducer A8, temperature transducer B9, catalyst converter 10, engine electronic control unit (ECU) 11, air ejector 12, adds blue sparger 13.
Describedly add blue tank 2 and be used for holding and add blue solution, add blue tank 2 and be built-in with antifreeze electric heating wire 3, be used for adding blue solution and can owing to extraneous cold solidifying, system of the present invention being worked under cold climate yet for adding blue solution heating, making.The electric heating wire two ends are parallel with heater switch 4, control the opening and closing of electric heating wire by heater switch 4.Heater switch 4 with add blue controller 7 and link to each other.
Add blue tank 2 respectively by adding blue liquid level sensor 6 and adding blue temperature transducer 5 and add blue controller 7 and link to each other, add blue controller 7 and add blue liquid level sensor 6 and the liquid level signal and the temperature signal that add blue temperature transducer 5 transmissions by collection, detect and store to add and add blue solution level height and temperature in the blue tank 2.Detect to add and add blue temperature in the blue tank 2 when being lower than setting temperature when adding blue controller 7, add blue controller 7 control heater switch 4 and open, heat for adding blue solution thereby open antifreeze electric heating wire 3.Detect to add and add blue liquid level in the blue tank 2 when being lower than setting height when adding blue controller 7, add blue controller 7 and will send relevant information to the user by the CAN bus, drive simultaneously the tutorial light alarm of analog amount, indigo plant is added in the reminding driver filling.
Describedly add blue sparger 13 and link to each other with adding blue tank 2 and add blue controller 7 by delivery line, adding blue solution will add blue solution by delivery line and be conveyed into and add in the blue sparger 13, add the unlatching and closure of blue sparger 13 by adding blue controller 7 controls, thereby the injection of blue solution is added in control.
Adding blue controller 7 links to each other with engine electronic control unit 11 by pipeline, be used for providing the working condition of adding blue sparger 13 to engine electronic control unit 11, thereby calculate by engine electronic control unit 11 and to add accordingly blue emitted dose, and will add blue emitted dose signal and send to adding blue controller 7, and then carry out feedback control and adjusting to adding blue sparger 13.Engine electronic control unit 11 links to each other with pressurized air performance element 1, and pressurized air performance element 1 links to each other with air ejector 12 by outlet pipe.Control the air of pressurized air performance element 1 discharging certain pressure and volume in the outlet pipe by engine electronic control unit 11, and spray pressurized air by air ejector 12 to adding blue sparger 13 places, can guarantee thus to add blue atomizing effect and bulk range, also can reduce the temperature of adding blue sparger 13 nozzle places.Do not need to spray when adding blue operating mode when engine electronic control unit 11 operates in, engine electronic control unit 11 also controlled superzapping contracting air performance element 1 continues to reduce the temperature of adding blue sparger 13 nozzle places to adding blue sparger 13 places injection pressurized air.
The described blue sparger 13 that adds is n, and n is natural number, and n 〉=1, a plurality ofly adds blue sparger 13 and can reduce the single number of times of operation that adds blue sparger 13 when adopting, and adding so blue sparger 13 in use need to be with very fast speed operation.And if be used for specifically adding blue solution and spray, adopt a plurality of volumes different add blue sparger 13, can make each add blue sparger 13 and carry different urea amounts, for example, one is added blue sparger 13 each impulse jet amount is 1mm
3Zong so each emitted dose is exactly 1mm
3Multiple, i.e. 1mm
3, 2mm
3, 3mm
3, 4mm
3On above-mentioned one basis of adding blue sparger 13 an individual pulse emitted dose being installed again is 0.5mm
3Add blue sparger 13, then each total emitted dose just can be 1mm
3, 1.5mm
3, 2mm
3, 2.5mm
3, 3mm
3This shows, add more accurate that blue controller 7 can be to the control of the urea amount carried in each work cycle.
At engine exhaust pipe 14 catalyst converter 10 is installed, catalyst converter 10 is used for the gas (NOx) of engine exhaust pipe 14 dischargings is reduced.Entrance and outlet port at catalyst converter 10 are separately installed with catalyst converter 10 temperature transducer A8 and catalyst converter 10 temperature transducer B9, temperature transducer A8 and temperature transducer B9 are installed on the engine exhaust pipe 14, are used for gathering the temperature of engine exhaust pipe 14 interior institute Exhaust Gas.By temperature transducer A8 and temperature transducer B9 with add blue controller 7 and be connected, thereby by adding the temperature of the gas that discharges in blue controller 7 Real-time Collections and control catalyst converter 10 entrances and outlet port.
As shown in Figure 2, in said structure, described air ejector 12 with add blue sparger 13 and be installed on the engine exhaust pipe 14, and air ejector 12 and add blue sparger 13 successively between the temperature transducer A8 of engine exhaust pipe 14 and catalyst converter 10 ingress.As shown in Figure 3, adding blue sparger 13 also can be installed on the injection prolongation pipeline 15 with air ejector 12, spraying prolongation pipeline 15 links to each other with engine exhaust pipe 14, spray an end connecting end that prolongs pipeline 15, the other end is free end, and the connecting end that spray to prolong pipeline 15 is connected on the engine exhaust pipe 14 between the temperature transducer A8 of engine electronic control unit 11 and catalyst converter 10 ingress; Described air ejector 12 is installed in and sprays the free end that prolongs pipeline 15, adds blue sparger 13 and is connected between free end and the connecting end.The air that ejects by air ejector 12 thus can directly impact and add the indigo plant of adding that blue sparger 13 ejects, for adding blue sparger 13 coolings and improving and add blue atomizing effect.And be arranged in independent pipeline owing to add blue sparger 13, make it avoid directly contacting with high-temp waste gas, thereby improve the working environment that adds blue sparger 13.
Describedly add that blue sparger 13 comprises case of sprayer 12a, adds blue inlet passage 12b, one-way valve A12c, one-way valve B12d, add blue outer pipe 12f, piston 12g, biasing spring 12h, solenoid 12i, volute spring 12j.
Case of sprayer 12a inner and upper has adds blue chamber 12e, adds in the housing of blue chamber 12e below to have control chamber 12k.Be provided with dunnage 12l in the control chamber bottom, the upper surface of dunnage 12l is equipped with piston 12g.Add the axial outside that is positioned at piston 12g among the blue chamber 12e and be disposed with biasing spring 12h and solenoid 12i, solenoid 12i arrives engine electronic control unit 11 by connection.Make the upper-lower position of piston 12g in control chamber relatively fixing by biasing spring 12h.The top of described piston 12g is inserted into adds among the blue chamber 12e.
Be equipped with at the sidewall of housing and add blue inlet passage 12b, add blue inlet passage 12b and add blue chamber 12e and communicate.Assigned one-way valve A12c in adding blue inlet passage 12b, the end of one-way valve A12c extend into and adds among the blue chamber 12e, the other end and add between blue inlet passage 12b helical spring 12m is installed.
Be equipped with on the top of housing and add blue outer pipe 12f, the bottom of outer pipe communicates with adding blue chamber 12e by through hole 12n, is provided with one-way valve B12d in the outer pipe bottom, and one-way valve B12d top is provided with volute spring 12j.
Add blue solution and enter into and add blue chamber 12e by adding blue inlet passage 12b, prevent from adding the backflow of blue solution by one-way valve A12c.
Piston 12g is by biasing spring 12h and solenoid 12i acting in conjunction, piston 12g is pumped in control chamber, before basket is added in injection, the biased spring 12h of piston 12g is depressed into minimum point (namely adding the point of blue chamber 12e volume maximum), then solenoid 12i energising, thus pulling dunnage 121 contacts with solenoid 12i or approximate contact.Power by piston 12g opposing biasing spring 12h, thereby piston 12g is moved upward make and add the 12e internal volume minimizing of blue chamber, pressure raises, and adds the one-way valve B12d that the volute spring 12j among the blue outer pipe 12f loads until push open, finally makes to add blue solution and spray from add blue outer pipe 12f.
In case solenoid 12i outage, biasing spring 12h is downward pushing piston 12g just, and promotes dunnage away from solenoid 12i.Add the 12e volume increase of blue chamber owing to moving downward of piston 12g can make, thereby one-way valve B12d closes, one-way valve A12c opens.The piston 12g of motion will add blue solution and be evacuated to and add blue chamber 12e from adding blue entrance, finish and add the filling of adding blue solution among the blue chamber 12e.
Said structure add blue sparger 13 so that piston 12g can set the distance of its motion in each operation, thereby the emitted dose that has guaranteed to add blue solution is constant in each operation, and no longer need reflux valve to control unnecessary blue backflow of adding, also do not need to add simultaneously blue pump and control supply and add blue solution.
On the engine exhaust pipe 14 of 12 of engine electronic control unit 11 and air ejectors, also NOx sensor 16 can be installed, NOx sensor 16 with add blue controller 7 and link to each other.Add blue controller 7 and receive the NOx discharge amount information that NOx sensors 16 send, thereby carry out the calculating of the reduction dosage that injected before catalyst converter 10 injecting catalysts, and send pulse signal to adding blue sparger 13, the number of times of operation of blue sparger 13 is added in control.Because NOx sensor 16 can accurately collect the NOx amount in the exhaust, therefore compare more accurate by engine electronic control unit 11 controls for the control of the emitted dose of adding blue solution, and treatment effect is better.
Claims (6)
1. the selective catalytic reduction system operating that accurately sprays of a fixed quantity is characterized in that: comprise the pressurized air performance element, add blue tank, antifreeze electric heating wire, heater switch, add blue temperature transducer, add blue controller, catalyst temperature sensor A, catalyst temperature sensor B, catalyst converter, engine electronic control unit, air ejector, add blue sparger;
Describedly add blue tank and be built-in with antifreeze electric heating wire, the electric heating wire two ends are parallel with heater switch; Heater switch with add blue controller and link to each other; Add blue tank respectively by adding blue liquid level sensor, adding blue temperature transducer and add blue controller and link to each other; Describedly add blue sparger and link to each other with adding blue tank and add blue controller by delivery line; Add blue controller and link to each other with engine electronic control unit by pipeline, engine electronic control unit links to each other with the pressurized air performance element, and the pressurized air performance element links to each other with air ejector by the pressurized air outlet pipe; Catalyst converter is installed on the engine exhaust pipe, and the entrance of catalyst converter and outlet port are separately installed with catalyst temperature sensor A and catalyst temperature sensor B, and catalyst temperature sensor A and catalyst temperature sensor B are installed on the engine exhaust pipe;
Describedly add that blue sparger comprises case of sprayer, adds blue inlet passage, one-way valve A, one-way valve B, add blue chamber, add blue outer pipe, piston, biasing spring, solenoid;
The case of sprayer inner and upper has adds blue chamber, and below, case of sprayer inside has control chamber; Be provided with dunnage in the control chamber bottom, the upper surface of dunnage is equipped with piston; Add the axial outside that is positioned at piston in the blue chamber and be disposed with biasing spring and solenoid, solenoid to engine electronic control unit, makes piston upper-lower position control chamber in relatively fixing by biasing spring by connection; The top of described piston is inserted into adds in the blue chamber;
Be provided with at the sidewall of case of sprayer and add blue inlet passage, add blue inlet passage and add blue chamber and communicate; Assigned one-way valve A in adding blue inlet passage, the end of one-way valve A extend into and adds in the blue chamber, the other end and add between blue inlet passage helical spring is installed; The top of case of sprayer is equipped with adds blue outer pipe, and the bottom of outer pipe communicates with adding blue chamber by through hole, is provided with one-way valve B in the outer pipe bottom, and one-way valve B top is provided with spring.
2. the selective catalytic reduction system operating that accurately sprays of a kind of fixed quantity as claimed in claim 1 is characterized in that: described to add blue sparger be n, and n is natural number, and n 〉=1.
3. the selective catalytic reduction system operating that accurately sprays of a kind of fixed quantity as claimed in claim 1, it is characterized in that: described air ejector with add blue sparger and be installed on the engine exhaust pipe, and air ejector and add blue sparger successively between the catalyst temperature sensor A of engine exhaust pipe and catalyst converter ingress.
4. the selective catalytic reduction system operating that accurately sprays of a kind of fixed quantity as claimed in claim 1, it is characterized in that: described blue sparger and the air ejector of adding is installed in to spray and prolongs on the pipeline, spraying an end that prolongs pipeline is connecting end, the other end is free end, and the connecting end on engine exhaust pipe inspection extension tube road is connected on the engine exhaust pipe between the catalyst temperature sensor A of engine electronic control unit ECU and catalyst converter ingress; Described air ejector is installed in and sprays the free end that prolongs pipeline, adds blue sparger and is connected between free end and the connecting end.
5. the selective catalytic reduction system operating that accurately sprays of a kind of fixed quantity as claimed in claim 1, it is characterized in that: the NOx sensor is installed on the engine exhaust pipe between described engine electronic control unit and air ejector, the NOx sensor with add blue controller and link to each other.
6. the selective catalytic reduction system operating that accurately sprays of a kind of fixed quantity as claimed in claim 1, it is characterized in that: the spring that described one-way valve B top arranges is volute spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101132593A CN102162390B (en) | 2011-05-04 | 2011-05-04 | Selective catalytic reduction system with multiple quantitative accurate injection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101132593A CN102162390B (en) | 2011-05-04 | 2011-05-04 | Selective catalytic reduction system with multiple quantitative accurate injection function |
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| Publication Number | Publication Date |
|---|---|
| CN102162390A CN102162390A (en) | 2011-08-24 |
| CN102162390B true CN102162390B (en) | 2013-02-27 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720575B (en) * | 2012-06-29 | 2017-09-29 | 中国第一汽车股份有限公司 | The aftertreatment control unit of single-stage waste heat storing and supplying ammonia |
| CN103821600B (en) * | 2012-11-16 | 2016-08-03 | 联创汽车电子有限公司 | The controller of selective catalytic reduction system operating |
| CN104016023B (en) * | 2014-06-06 | 2017-06-20 | 华南农业大学 | A kind of liquid fertilizer vending machine |
| CN105114157B (en) * | 2015-06-29 | 2018-05-22 | 北京理工大学 | A kind of segmentation urea injection method of engine transition operating mode |
| CN110500160A (en) * | 2018-05-17 | 2019-11-26 | 北汽福田汽车股份有限公司 | Vehicle tail gas treatment device, system, method and vehicle |
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| US5884475A (en) * | 1994-09-13 | 1999-03-23 | Siemens Aktiengesellschaft | Method and device for introducing liquid into an exhaust-gas purification system |
| US6363771B1 (en) * | 1999-11-24 | 2002-04-02 | Caterpillar Inc. | Emissions diagnostic system |
| CN101457682A (en) * | 2008-11-13 | 2009-06-17 | 阿尔博耐尔有限公司 | Parts carrier for measurement system |
| CN101493027A (en) * | 2009-01-14 | 2009-07-29 | 无锡市凯龙汽车设备制造有限公司 | Air mixing and metering system for processing vehicle exhaust |
| CN101963084A (en) * | 2010-10-29 | 2011-02-02 | 上海交通大学 | Selective catalytic reduction urea air premixing jet system |
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- 2011-05-04 CN CN2011101132593A patent/CN102162390B/en active Active
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| US5884475A (en) * | 1994-09-13 | 1999-03-23 | Siemens Aktiengesellschaft | Method and device for introducing liquid into an exhaust-gas purification system |
| US6363771B1 (en) * | 1999-11-24 | 2002-04-02 | Caterpillar Inc. | Emissions diagnostic system |
| CN101457682A (en) * | 2008-11-13 | 2009-06-17 | 阿尔博耐尔有限公司 | Parts carrier for measurement system |
| CN101493027A (en) * | 2009-01-14 | 2009-07-29 | 无锡市凯龙汽车设备制造有限公司 | Air mixing and metering system for processing vehicle exhaust |
| CN101963084A (en) * | 2010-10-29 | 2011-02-02 | 上海交通大学 | Selective catalytic reduction urea air premixing jet system |
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| CN102162390A (en) | 2011-08-24 |
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