CN102678239A - Independent SCR (semiconductor control rectifier) system control method and control device based on NOx (nitrogen oxide) sensor - Google Patents
Independent SCR (semiconductor control rectifier) system control method and control device based on NOx (nitrogen oxide) sensor Download PDFInfo
- Publication number
- CN102678239A CN102678239A CN2012101796118A CN201210179611A CN102678239A CN 102678239 A CN102678239 A CN 102678239A CN 2012101796118 A CN2012101796118 A CN 2012101796118A CN 201210179611 A CN201210179611 A CN 201210179611A CN 102678239 A CN102678239 A CN 102678239A
- Authority
- CN
- China
- Prior art keywords
- nox
- sensor
- blue solution
- control
- signal
- 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.)
- Pending
Links
Images
Classifications
-
- 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
Abstract
The invention discloses an independent SCR (semiconductor control rectifier) system control method and a control device based on a NOx sensor. A signal acquiring unit disclosed by the invention mainly comprises a differential pressure transducer, an inlet NOx sensor, an absolute pressure sensor, an inlet temperature sensor, an outlet temperature sensor and an outlet NOx sensor. The control device is provided with a CAN (controller area network) bus interface, and a singlechip is communicated with an urea pump through the CAN bus interface to control the spray of the amount of blue adding solution. The signal acquiring unit acquires the state of engine tail gas in real time, and the acquired state is transmitted to the singlechip for calculating the required spray amount of the blue adding solution. According to the independent SCR system control method and the control device, the design of a traditional engine control system is not changed, and only six sensors are installed on an exhaust pipeline to directly configure the independent SCR control device, and the SCR control device is completely independent from an engine electronic controller.
Description
Technical field
What the present invention relates to is a kind of independently SCR system control method and control gear, belongs to the motor field of engineering technology, can better be applicable to various engine model, saves complicated motor communication coupling work.Be based on NOx sensor independently SCR system control method and control gear concretely.
Background technique
Along with rapid development of automobile industry, the tail gas pollution problem is more and more outstanding, and the Abgasgesetz of China (the IV stage and the V stages of rules and regulations) is also constantly strict; This just needs constantly to improve the exhaust aftertreatment technology, and with EGR exhaust aftertreatment compared with techniques, optimized combustion in the cylinder+SCR exhaust gas aftertreatment system route has more advantage; The Economy that not only helps fuel oil; And lower to the receptance of sulphur, realize high laws and regulations requirement more easily, the SCR technology will become mainstream technology.
China SCR technology still is in the starting stage, also has many problems to remain to be solved.Because the measured NOx concentration of NOx sensor all is volume solubility at present; And the volume flowrate of tail gas can't directly be measured; So existing SCR exhaust aftertreatment scheme know-why is through judging the operating conditions of vehicle with Motronic control maps controller (ECU) communication, directly inquire about MAP figure and judge the NOx discharge amount, throwing in an amount of blue solution that adds according to the NOx discharge amount at air outlet flue; Itself and NOx carry out reduction reaction, realize the purpose of the NOx discharging of reduction motor exhaust.Owing to carry out communication with Motronic control maps controller (ECU); For the SCR control system, must mate the motor interface parameters; This increased beyond doubt the SCR control system development workload and with the correspondence one by one of motor, this applicability to the SCR control system has received certain restriction.Therefore propose a kind ofly can effectively improve the applicability of SCR control system and the Economy of exploitation, can well apply in the motor exhaust reprocessing based on NOx sensor independently SCR controlling method and control gear.
Summary of the invention
The objective of the invention is to propose based on NOx sensor independently SCR system control method and control gear; And need not judge the NOx discharge capacity through carrying out communication with Motronic control maps controller (ECU); Can directly obtain required various parameter through signal gathering unit; Calculate the amount of adding blue solution of required injection again through the MCU control unit, make NOx reach laws and regulations requirement.
Technological scheme of the present invention: of the present invention based on NOx sensor SCR system control method independently, the steps include:
The first step: measure the pressure difference in the exhaust duct by differential pressure pickup respectively; Absolute pressure sensor is measured the absolute pressure of exhaust duct, the NOx volume concentration of the exhaust temperature of temperature sensor measurement exhaust duct and tail gas import NOx sensor measurement exhaust duct.
Second step: the signal of above measurement is transferred to the MCU control unit; Calculate the exhaust gas volumes flow that respectively pressure difference is converted to exhaust duct through the MCU control unit; Absolute pressure and temperature are used for calculating the density of tail gas and the NOx volume concentration of import, thereby calculate the molal quantity of NOx.
The 3rd step: molal quantity and the chemical reaction relation of adding between the blue solution through the NOx that calculated by the MCU control unit draw the blue solution fundamental quantity that adds that needs injection, revise its value according to catalyzer transformation efficiency under the known relevant temperature again.
The 4th step: whether the NOx sensor in real time monitoring NOx concentration by outlet satisfies the concentration requirement that sets, and gives MCU control unit and an amount of emitted dose of adding blue solution of regulating with signal feed back, forms closed loop control.
The 5th step: the blue solution amount signal that adds of the required injection that will be calculated by the MCU control unit is transferred to the urea pump batching unit; Batching unit adds the NOx concentration that blue solution reduces tail gas through the nozzle ejection in the desired amount, makes it to reach state's IV standard even state's V standard.
Above-mentioned for realizing based on NOx sensor SCR system control method independently, also need specific control gear.A kind of control gear of said method of realizing mainly comprises signal gathering unit, single-chip microcomputer and peripheral circuit thereof.Signal gathering unit mainly comprises differential pressure pickup, import NOx sensor, absolute pressure sensor, inlet temperature sensor, outlet temperature sensor, outlet NOx sensor.Control gear is provided with the CAN EBI, and single-chip microcomputer carries out communication through CAN EBI and urea pump and controls the injection of adding blue solution amount.Signal gathering unit is gathered the residing state of motor exhaust in real time; And the state transfer of gathering calculated the required blue solution emitted dose of adding to single-chip microcomputer; This just need not judge the required blue solution emitted dose of adding through the data that the CAN bus of Motronic control maps controller (ECU) is accepted engine behavior, has so just formed based on NOx sensor SCR system controller independently.
Superiority of the present invention is:
(1) propose a kind of based on NOx sensor SCR controlling method independently.This method is to gather the pressure reduction of tail gas, spend the parameter of pressure, temperature, NOx concentration extremely through signal gathering unit, and will add the function that blue solution emitted dose is expressed as these parameters.Therefore, independently the SCR control system only needs simply to control the emitted dose of adding blue solution through the parameter of signal gathering unit collection, with being controlled in the laws and regulations requirement scope of NOx discharging.
(2) a kind of independently SCR control mode has been proposed.This mode is the control gear that is totally independent of Motronic control maps controller (ECU) that design is the main body with single-chip microcomputer and signal gathering unit; This device need not carry out communication through the electronic controller (ECU) with motor and obtain the emitted dose of adding blue solution that the data of engine behavior come forecasting institute to need; But directly obtain the required emitted dose of urea, and control injection through single-chip microcomputer CAN interface and the communication of urea pump batching unit and add blue solution aequum through signal gathering unit.This mode makes that not only the tail gas parameter acquiring of motor is simple; And solved the problem that can't realize arbitrarily disposing the SCR system because of the CAN interface parameters of not knowing Motronic control maps controller (ECU); Can not change the design of original engine control system; Only six sensors need be installed on exhaust duct just can directly dispose this independently SCR control gear, complete and Motronic control maps controller (ECU) independence.
(3) a kind of required method of adding blue solution amount of calculating is proposed.This method is to be the basis with the various sensors on the exhaust pipe; Calculate the density of tail gas through absolute pressure sensor and temperature transducer; Calculate the volume flowrate of tail gas with the differential pressure pickup measurement, calculate NOx actual molal quantity and the catalyzer transformation efficiency under the relevant temperature according to the volume concentration of NOx sensor measurement again and calculate the required blue solution emitted dose of adding.This method can calculate the required amount of adding blue solution equally under the situation of the CAN interface parameters of not knowing Motronic control maps controller (ECU) fully; This just can let independently the SCR control gear has more applicability, can on various motors, be configured well.
Description of drawings
Fig. 1 is a SCR system global structure block diagram.
Fig. 2 is an independence control gear structure principle chart of the present invention.
Fig. 3 is that the present invention calculates the required method schematic diagram that adds blue solution amount.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed explanation.
Fig. 1 is the general structure block diagram of SCR system.
This general structure block diagram is made up of SCR system itself intrinsic device and independent SCR system controller of the present invention, and the intrinsic device of SCR system itself comprises urea nozzle 5, urea tank liquid level and temperature transducer 8, add blue solution liquid inlet pipe 9, add blue solution reflow pipe 10, urea tank 11, urea pump 12, motor 15, SCR catalyzer 16.Independent SCR system controller of the present invention comprises differential pressure pickup 1, import NOx sensor 2, absolute pressure sensor 3, inlet temperature sensor 4, outlet temperature sensor 6, outlet NOx sensor 7, CAN bus 13, independent control unit MCU 14.
Fig. 2 is an independence control gear structure principle chart of the present invention.
Independence control gear of the present invention comprises single-chip microcomputer and peripheral circuit, and it comprises single-chip microcomputer fundamental system, outside extended menory, CAN bus interface circuit, switching value, analog amount input interface, controlled quentity controlled variable output interface.
Single-chip microcomputer is totally independent of Motronic control maps controller (ECU); Need not calculate required amount of adding blue solution through obtaining the engine behavior data with Motronic control maps controller (ECU) communication; But through adding signals such as pressure reduction that the separate signal collecting unit obtains tail gas in real time, absolute pressure, temperature, NOx volume concentration; And temporarily store into these signal datas in the extended menory; Single-chip microcomputer calculates the required blue solution emitted dose of adding according to the required computational methods of adding blue solution amount that set; Give the batching unit of urea pump then through CAN interface output control signal corresponding, batching unit is quantitatively controlled to spray and is added blue solution.
Because single-chip microcomputer is totally independent of Motronic control maps controller (ECU); Replace the engine operation data parameters of present SCR system so need signal gathering unit to gather pressure difference signal, absolute pressure signal, temperature signal, NOx concentration signal in the exhaust duct through obtaining with Motronic control maps controller (ECU) communication; Signal gathering unit also comprises liquid level and the temperature signal of gathering urea tank; These signals also need be handled through signal conditioning circuit, are transferred to single-chip microcomputer through the analog amount input interface again and carry out computational analysis.
The CAN bus interface circuit is the approach of signal transmission between single-chip microcomputer and urea pump, the NOx sensor.Urea pump and single-chip microcomputer can carry out mutual communication through the CAN interface, reach real-time signal transmission and the effect of feeding back.And the NOx sensor can only be transferred to signal single-chip microcomputer and handle calculating.
The controlled quentity controlled variable output interface mainly is that blue solution level, low liquid level warning tutorial light, urea tank temperature and cooling liquid electromagnetic valve switch control signal are added in output.Switch value input interface is a collection vehicle key operation signal, determines whether to start this independently control gear.
Fig. 3 is that the present invention calculates the required method schematic diagram that adds blue solution amount.
The present invention calculates the required computational methods of adding blue solution amount that required method of adding blue solution amount is based on differential pressure pickup, absolute pressure sensor, temperature transducer, import and export NOx sensor and single-chip microcomputer.The steps include:
The first step: gather pressure reduction, absolute pressure, temperature, import NOx volume concentration, the outlet NOx volume concentration parameter of tail gas respectively by each sensor in real time, and these parameters are transferred to single-chip microcomputer.
Second the step: by equation of state of gas
and
derivation of equation goes out
wherein ρ be tail gas density; P is a pressure; M is the tail gas molal weight; R is a gas constant, and T is an exhaust temperature.Single-chip microcomputer calculates tail gas density according to absolute pressure and temperature according to said density formula.
The 3rd step: derive volume flowrate
by Bernoulli's equation
and flow formula
; Wherein D is the exhaust duct diameter; Δ P is a pressure reduction, and Q is the exhaust gas volumes flow.Tail gas density and measured pressure difference that single-chip microcomputer calculated according to second step calculate the exhaust gas volumes flow.
The 4th step: single-chip microcomputer multiply by the 3rd according to measured NOx volume concentration and goes on foot the volume number that the volume flowrate that calculates calculates NOx, directly calculates the NOx molal quantity by equation of state of gas
again.
The 5th step: can draw calculating by the chemical equation relation and add blue solution amount formula
basically; Wherein
is the NOx molal quantity; M is the urea molal weight, and m is for adding blue solution amount.The molal quantity of the NOx that single-chip microcomputer calculates in going on foot according to formula and the 4th calculates the required blue solution fundamental quantity that adds; Add the correction of blue solution fundamental quantity again according to the known transformation efficiency of catalyzer under relevant temperature; And by outlet NOx concentration come feedback regulation actual required add blue solution amount, the blue solution amount signal that adds that reality is required sends to the urea pump batching unit by single-chip microcomputer and quantitatively controls the injection of adding blue solution.
According to the proposed method, control gear hardware configuration and system program can be totally independent of Motronic control maps controller (ECU).Like this can be under the situation of the CAN interface parameters of not knowing Motronic control maps controller (ECU) fully; Only need on exhaust duct, install just can the be direct supporting installation SCR of six sensors system additional, this has saved the coupling work of complicated Motronic control maps controller (ECU) CAN interface parameters fully.
This device is totally independent of Motronic control maps controller (ECU); Its function is: will convert required injection to from the tail gas parameter signal calculating of signal collecting unit and add blue solution amount; Add blue solution injected volume through control executing mechanism control; The NOx emission control in the laws and regulations requirement scope, is shown the liquid level in the urea tank and temperature, the temperature of controlling urea tank solution and low liquid level warning prompting etc. in the SCR system simultaneously, make the correct orderly work of SCR system.
Claims (2)
1. based on NOx sensor SCR system control method independently, it is characterized in that this method may further comprise the steps:
The first step: measure the pressure difference in the exhaust duct by differential pressure pickup respectively; Absolute pressure sensor is measured the absolute pressure of exhaust duct, the NOx volume concentration of the exhaust temperature of temperature sensor measurement exhaust duct and tail gas import NOx sensor measurement exhaust duct;
Second step: the signal of above measurement is transferred to the MCU control unit; Calculate the exhaust gas volumes flow that respectively pressure difference is converted to exhaust duct through the MCU control unit; Absolute pressure and temperature are used for calculating the density of tail gas and the NOx volume concentration of import, thereby calculate the molal quantity of NOx;
The 3rd step: molal quantity and the chemical reaction relation of adding between the blue solution through the NOx that calculated by the MCU control unit draw the blue solution fundamental quantity that adds that needs injection, revise its value according to catalyzer transformation efficiency under the known relevant temperature again;
The 4th step: whether the NOx sensor in real time monitoring NOx concentration by outlet satisfies the concentration requirement that sets, and gives MCU control unit and an amount of emitted dose of adding blue solution of regulating with signal feed back, forms closed loop control;
The 5th step: the blue solution amount signal that adds of the required injection that will be calculated by the MCU control unit is transferred to the urea pump batching unit; Batching unit adds the NOx concentration that blue solution reduces tail gas through the nozzle ejection in the desired amount, makes it to reach state's IV standard even state's V standard.
2. a control gear of realizing said method comprises signal gathering unit, single-chip microcomputer and peripheral circuit thereof; It is characterized in that: control gear is provided with the CAN EBI, and single-chip microcomputer carries out communication through CAN EBI and urea pump and controls the injection of adding blue solution amount; Signal gathering unit is gathered the residing state of motor exhaust in real time, and the state transfer of gathering is calculated to single-chip microcomputer, draws the required blue solution emitted dose of adding;
Described signal gathering unit comprises differential pressure pickup, import NOx sensor, absolute pressure sensor, inlet temperature sensor, outlet temperature sensor, outlet NOx sensor; Said differential pressure pickup, import NOx sensor, absolute pressure sensor, inlet temperature sensor are successively set on the exhaust duct between motor and the catalytic reactor, and are connected with the single-chip microcomputer signal; Described inlet temperature sensor also is provided with nozzle near catalytic reactor between catalytic reactor and inlet temperature sensor, described nozzle is connected with the urea delivery side of pump;
Exhaust duct after the catalytic reactor is provided with outlet temperature sensor and outlet NOx sensor, and described outlet temperature sensor, outlet NOx sensor are connected with the single-chip microcomputer signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101796118A CN102678239A (en) | 2012-06-04 | 2012-06-04 | Independent SCR (semiconductor control rectifier) system control method and control device based on NOx (nitrogen oxide) sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101796118A CN102678239A (en) | 2012-06-04 | 2012-06-04 | Independent SCR (semiconductor control rectifier) system control method and control device based on NOx (nitrogen oxide) sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102678239A true CN102678239A (en) | 2012-09-19 |
Family
ID=46810715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101796118A Pending CN102678239A (en) | 2012-06-04 | 2012-06-04 | Independent SCR (semiconductor control rectifier) system control method and control device based on NOx (nitrogen oxide) sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102678239A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900502A (en) * | 2012-10-17 | 2013-01-30 | 北京工业大学 | Oxygen sensor-based urea jet control device for diesel and control method for jet control device |
| CN103266941A (en) * | 2013-04-25 | 2013-08-28 | 中国船舶重工集团公司第七一一研究所 | Control method of marine SCR (selective catalytic reduction) system |
| CN103277177A (en) * | 2013-06-19 | 2013-09-04 | 潍柴动力股份有限公司 | Correction method, device and system for aging of selective catalytic reduction (SCR) |
| CN104612791A (en) * | 2015-01-28 | 2015-05-13 | 东风商用车有限公司 | Method and system for controlling urea solution spraying amount in closed loop mode through SCR system |
| CN104763498A (en) * | 2015-03-05 | 2015-07-08 | 天纳克（苏州）排放系统有限公司 | Diesel engine nitrogen oxide after-treatment system, control method and application |
| CN105179052A (en) * | 2015-07-13 | 2015-12-23 | 南通亚泰工程技术有限公司 | Marine SCR urea solution spraying system and control method |
| CN110295979A (en) * | 2019-06-28 | 2019-10-01 | 潍柴动力股份有限公司 | A kind of reducing agent ejection control method and device |
| CN111441846A (en) * | 2020-03-28 | 2020-07-24 | 潍坊势为环保有限公司 | Method and device for correcting urea injection amount of SCR (Selective catalytic reduction) system and SCR system |
| CN112360600A (en) * | 2020-10-30 | 2021-02-12 | 凯龙高科技股份有限公司 | SCR injection control system for internal combustion engine test bench based on air inflow |
| CN114651117A (en) * | 2019-11-07 | 2022-06-21 | 康明斯排放处理公司 | Outlet channel for aftertreatment sensor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080260597A1 (en) * | 2007-04-23 | 2008-10-23 | Denso Corporation | Reducing gas generator and solid reductant SCR system having the generator |
| CN100451307C (en) * | 2004-12-18 | 2009-01-14 | 赫多特普索化工设备公司 | Method for controlling injection of reducing agent in exhaust gas from a combustion engine |
| US20110060465A1 (en) * | 2009-09-07 | 2011-03-10 | Hyundai Motor Company | Control apparatus of ammonia loading amount for SCR system and control method for the same |
| CN102493860A (en) * | 2011-12-08 | 2012-06-13 | 中国人民解放军军事交通学院 | Closed loop control method for SCR (Selective Catalyst Reduction) system of all-working-condition diesel engine |
| CN102588055A (en) * | 2012-02-24 | 2012-07-18 | 潍柴动力扬州柴油机有限责任公司 | Independent type SCR (selective catalytic reduction) metered injection control method and system |
| CN202611815U (en) * | 2012-06-04 | 2012-12-19 | 浙江大学 | Independent silicon controlled rectifier (SCR) system control device based on NOx sensor |
-
2012
- 2012-06-04 CN CN2012101796118A patent/CN102678239A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451307C (en) * | 2004-12-18 | 2009-01-14 | 赫多特普索化工设备公司 | Method for controlling injection of reducing agent in exhaust gas from a combustion engine |
| US20080260597A1 (en) * | 2007-04-23 | 2008-10-23 | Denso Corporation | Reducing gas generator and solid reductant SCR system having the generator |
| US20110060465A1 (en) * | 2009-09-07 | 2011-03-10 | Hyundai Motor Company | Control apparatus of ammonia loading amount for SCR system and control method for the same |
| CN102493860A (en) * | 2011-12-08 | 2012-06-13 | 中国人民解放军军事交通学院 | Closed loop control method for SCR (Selective Catalyst Reduction) system of all-working-condition diesel engine |
| CN102588055A (en) * | 2012-02-24 | 2012-07-18 | 潍柴动力扬州柴油机有限责任公司 | Independent type SCR (selective catalytic reduction) metered injection control method and system |
| CN202611815U (en) * | 2012-06-04 | 2012-12-19 | 浙江大学 | Independent silicon controlled rectifier (SCR) system control device based on NOx sensor |
Non-Patent Citations (1)
| Title |
|---|
| 刘军，吴硕开，何国国，岳兴莲: "《SCR控制策略的研究》", 《拖拉机与农用运输车》, vol. 37, no. 3, 30 June 2010 (2010-06-30), pages 34 - 36 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900502A (en) * | 2012-10-17 | 2013-01-30 | 北京工业大学 | Oxygen sensor-based urea jet control device for diesel and control method for jet control device |
| CN102900502B (en) * | 2012-10-17 | 2015-01-14 | 北京工业大学 | Oxygen sensor-based urea jet control device for diesel and control method for jet control device |
| CN103266941A (en) * | 2013-04-25 | 2013-08-28 | 中国船舶重工集团公司第七一一研究所 | Control method of marine SCR (selective catalytic reduction) system |
| CN103266941B (en) * | 2013-04-25 | 2015-04-15 | 中国船舶重工集团公司第七一一研究所 | Control method of marine SCR (selective catalytic reduction) system |
| CN103277177A (en) * | 2013-06-19 | 2013-09-04 | 潍柴动力股份有限公司 | Correction method, device and system for aging of selective catalytic reduction (SCR) |
| CN104612791A (en) * | 2015-01-28 | 2015-05-13 | 东风商用车有限公司 | Method and system for controlling urea solution spraying amount in closed loop mode through SCR system |
| CN104763498A (en) * | 2015-03-05 | 2015-07-08 | 天纳克（苏州）排放系统有限公司 | Diesel engine nitrogen oxide after-treatment system, control method and application |
| CN104763498B (en) * | 2015-03-05 | 2017-06-23 | 天纳克（苏州）排放系统有限公司 | Diesel engine nitrogen oxides after-treatment system, control method and its application |
| CN105179052A (en) * | 2015-07-13 | 2015-12-23 | 南通亚泰工程技术有限公司 | Marine SCR urea solution spraying system and control method |
| CN110295979A (en) * | 2019-06-28 | 2019-10-01 | 潍柴动力股份有限公司 | A kind of reducing agent ejection control method and device |
| CN114651117A (en) * | 2019-11-07 | 2022-06-21 | 康明斯排放处理公司 | Outlet channel for aftertreatment sensor |
| CN114651117B (en) * | 2019-11-07 | 2023-09-26 | 康明斯排放处理公司 | Outlet channel for aftertreatment sensor |
| CN111441846A (en) * | 2020-03-28 | 2020-07-24 | 潍坊势为环保有限公司 | Method and device for correcting urea injection amount of SCR (Selective catalytic reduction) system and SCR system |
| CN112360600A (en) * | 2020-10-30 | 2021-02-12 | 凯龙高科技股份有限公司 | SCR injection control system for internal combustion engine test bench based on air inflow |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102678239A (en) | Independent SCR (semiconductor control rectifier) system control method and control device based on NOx (nitrogen oxide) sensor | |
| CN202250319U (en) | After-treatment system for tail gas of diesel engine | |
| CN102278222A (en) | Tail gas aftertreatment system and method for diesel engine | |
| CN104685185B (en) | System and method for controlling combustion knock | |
| CN102840042B (en) | Engine with EGR (Exhaust Gas Recirculation) device and method and device for controlling EGR rate | |
| CN106404402A (en) | Diesel engine full-dimension SCR catalytic reactor performance test platform based on tail gas simulation | |
| US20150308321A1 (en) | Exhaust emission prediction system and method | |
| CN102493860A (en) | Closed loop control method for SCR (Selective Catalyst Reduction) system of all-working-condition diesel engine | |
| CN106593709B (en) | A kind of system and method for diagnosis HFM measurement air input of engine by air accuracy | |
| CN103089460A (en) | Engine exhaust gas recirculation (EGR) valve closed-loop control system | |
| CN102269031A (en) | Universal type selective catalytic reduction (SCR) injection system | |
| CN202718748U (en) | Automatic control volume resonator for engine air intake system | |
| CN103234758B (en) | The method of simulation diesel engine vent gas state and control device thereof | |
| CN104849186A (en) | Particle sensor calibration system and measuring method | |
| CN102900502B (en) | Oxygen sensor-based urea jet control device for diesel and control method for jet control device | |
| CN105443272A (en) | Low-temperature combustion and small-load stable combustion device and method for internal combustion engine | |
| WO2017065754A1 (en) | Reference value engine control systems and methods | |
| CN101512129A (en) | Low-idle exhaust gas recirculation system | |
| CN106768204B (en) | A kind of engine intake airflow scaling method with self-learning function | |
| CN106703950A (en) | Independent SCR aftertreatment system and method | |
| CN202611815U (en) | Independent silicon controlled rectifier (SCR) system control device based on NOx sensor | |
| CN101839163B (en) | Particulate filter temperature correction system and method | |
| CN101245727B (en) | Control method and control device for controlling input amount in diesel engine SCR system | |
| CN105443212A (en) | Single-sensor double closed-loop urea-selective catalytic reduction (SCR) feedback control method based on observer | |
| CN102536397A (en) | Urea supply device for vehicular SCR (selective catalytic reduction) system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wu Feng Inventor after: Fan Hanmao Inventor after: Yao Dongwei Inventor after: Gan Xubo Inventor after: Ling Xinchen Inventor before: Wu Feng Inventor before: Fan Hanmao Inventor before: Yao Dongwei Inventor before: Gan Xubo Inventor before: Ling Xinchen |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120919 |