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US20130091827A1 - Monitor of ammonia in dosing system - Google Patents

Monitor of ammonia in dosing system Download PDF

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Publication number
US20130091827A1
US20130091827A1 US13/273,455 US201113273455A US2013091827A1 US 20130091827 A1 US20130091827 A1 US 20130091827A1 US 201113273455 A US201113273455 A US 201113273455A US 2013091827 A1 US2013091827 A1 US 2013091827A1
Authority
US
United States
Prior art keywords
ammonia
luminescence
luminophores
optical sensor
canister
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.)
Abandoned
Application number
US13/273,455
Other languages
English (en)
Inventor
James C. Bradley
Anthony J. Cook
Lev A. Datskovskiy
Mark Christen Bach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Truck Intellectual Property Co LLC
Original Assignee
International Truck Intellectual Property Co LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US13/273,455 priority Critical patent/US20130091827A1/en
Application filed by International Truck Intellectual Property Co LLC filed Critical International Truck Intellectual Property Co LLC
Assigned to INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, LLC reassignment INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BACH, MARK C, COOK, ANTHONY J, DATSKOVSKIY, LEV A, BRADLEY, JAMES C
Assigned to JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT reassignment JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT SECURITY AGREEMENT Assignors: INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC, INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, LLC, NAVISTAR INTERNATIONAL CORPORATION, NAVISTAR, INC.
Priority to CA2790368A priority patent/CA2790368A1/en
Priority to DE102012109077A priority patent/DE102012109077A1/de
Priority to BR102012025996-6A priority patent/BR102012025996A2/pt
Priority to SE1251150A priority patent/SE1251150A1/sv
Priority to CN2012103886369A priority patent/CN103046990A/zh
Priority to MX2012011999A priority patent/MX2012011999A/es
Publication of US20130091827A1 publication Critical patent/US20130091827A1/en
Assigned to INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC, INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, LLC, NAVISTAR, INC., NAVISTAR INTERNATIONAL CORPORATION reassignment INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/76—Chemiluminescence; Bioluminescence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus
    • 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
    • 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
    • F01N2560/021—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting ammonia NH3
    • 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
    • F01N2560/12—Other sensor principles, e.g. using electro conductivity of substrate or radio frequency
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • 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
    • F01N2610/12—Adding substances to exhaust gases the substance being in solid form, e.g. pellets or powder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/148—Arrangement of sensors
    • 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
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • 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
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806—Properties of reducing agent or dosing system

Definitions

  • This disclosure relates to an ammonia dosing system which delivers ammonia in gas phase from an ammonia storage canister into exhaust for after-treatment of oxides of nitrogen (NO x ) in the exhaust by selective catalytic reduction (SCR).
  • SCR selective catalytic reduction
  • Selective catalytic reduction is an exhaust after-treatment technology for enabling certain chemical reactions to occur between oxides of nitrogen (NO x ) in exhaust and ammonia (NH 3 ) introduced in gas phase into an exhaust system upstream of an SCR catalyst to entrain with exhaust flowing toward the catalyst where catalytic reactions convert NO x into Nitrogen (N 2 ) and water (H 2 O).
  • a motor vehicle which uses SCR technology for after-treatment of engine exhaust produced by operation of an internal combustion engine carries an on-board supply of ammonia which is stored in one or more canisters.
  • Such canisters are constructed to be removable from a vehicle, re-chargeable at a service facility, and re-installable in a vehicle.
  • Strontium chloride is an example of a storage medium which is present inside a canister for storing ammonia in solid phase and releasing stored ammonia in gas phase when heated to an ammonia release temperature.
  • This disclosure introduces apparatus and method for acquiring information about ammonia in an ammonia dosing system through the use of optically detectable ammonia.
  • Certain gases which are typically considered not optically detectable can be made optically detectable by certain processes.
  • a process which creates what are called “fluorophore absorber pairs” in an ammonia molecule can render ammonia optically detectable.
  • the fluorophore absorber pairs radiate absorbed energy at a characteristic wavelength.
  • a gas which has been rendered optically detectable may be said to luminesce or fluoresce.
  • luminophore and fluorophore are used in scientific literature as descriptors of molecules which are optically detectable, it appears that the latter is used to characterize certain species of the former.
  • the process which creates fluorophore absorber pairs in an ammonia molecule suggests that the molecule is a fluorophore, a species of the generic descriptor “luminophore.”
  • the present applicants will use the term “luminophore” here as a generic descriptor of an optically detectable molecule.
  • the apparatus and method disclosed here are useful in an ammonia dosing system which treats engine exhaust passing through an SCR after-treatment system using ammonia which contains ammonia luminophores.
  • ammonia luminophores in an ammonia dosing system provides luminescence of ammonia which renders the ammonia detectable by optical sensing apparatus.
  • optical sensing apparatus Specific sensing capabilities of optical sensing apparatus are a function of specific optical sensing technique employed and can extend from merely distinguishing between the presence and the absence of ammonia to measuring ammonia quantity and/or ammonia flow.
  • the apparatus and method can reduce the likelihood that an ammonia storage canister which contains little or no ammonia being installed in a vehicle.
  • the apparatus and method can indicate quantity of ammonia present inside an ammonia storage canister.
  • the apparatus and method can indicate outflow of ammonia from an ammonia storage canister.
  • a general aspect of the disclosed subject matter relates to an internal combustion engine comprising an exhaust after-treatment system comprising an SCR catalyst, and an ammonia dosing system comprising a canister having an interior containing optically detectable ammonia and a delivery apparatus for delivering optically detectable ammonia from the canister interior into the exhaust after-treatment system to entrain with engine exhaust flowing toward the SCR catalyst for catalytic conversion of NO x in the engine exhaust.
  • a monitor of ammonia luminophores comprises at least one optical sensor for detecting luminescence of ammonia luminophores in the ammonia dosing system.
  • the monitor comprises a device providing a signal distinguishing high luminescence of ammonia luminophores detected by the at least one optical sensor and low luminescence of ammonia luminophores detected by the at least one optical sensor.
  • the least one optical sensor provides a measure of luminescence of ammonia luminophores which the at least one optical sensor detects, and the monitor converts a measure of luminescence of ammonia luminophores which the at least one optical sensor detects into a quantified measure of ammonia.
  • the monitor provides a signal alert when a quantified measure of ammonia is less than a predetermined quantity.
  • the canister comprises a port via which the canister separably connects to the delivery apparatus, and the at least one optical sensor is arranged to view luminescence of ammonia luminophores within the canister's interior.
  • a closure When the canister's port is connected to the delivery apparatus and the at least one optical sensor detects luminescence of ammonia luminophores greater than a predetermined luminescence, a closure is operated to allow ammonia flow between the canister interior and the exhaust after-treatment system.
  • the closure When the canister's port is connected to the delivery apparatus and the at least one optical sensor detects luminescence of ammonia luminophores less than the predetermined luminescence, the closure is operated to disallow ammonia flow between the canister interior and the exhaust after-treatment system.
  • the closure and the at least one optical sensor are mounted on the delivery apparatus.
  • Another general aspect of the disclosed subject matter relates to a method for detection of ammonia in an ammonia dosing system which delivers ammonia into an engine exhaust after-treatment system to entrain with exhaust flowing toward an SCR catalyst for catalytic conversion of NO x .
  • the method comprises: installing in the ammonia dosing system an ammonia storage canister which contains ammonia luminophores; operating the ammonia dosing system to deliver ammonia from the ammonia storage canister into the exhaust after-treatment system; and using at least one optical sensor to detect luminescence of ammonia luminophores in the ammonia dosing system.
  • the method comprises providing a signal distinguishing high luminescence of ammonia luminophores detected by the at least one optical sensor and low luminescence of ammonia luminophores detected by the at least one optical sensor.
  • the method comprises using a measure of luminescence of ammonia luminophores which the at least one optical sensor detects to quantify a measure of ammonia.
  • the method provides a signal alert when a quantified measure of ammonia is less than a predetermined quantity.
  • the method comprises arranging the at least one optical sensor to view luminescence of ammonia luminophores in the canister's interior and when the at least one optical sensor detects luminescence of ammonia luminophores greater than a predetermined luminescence, allowing ammonia flow between the canister interior and the exhaust after-treatment system, and when the at least one optical sensor detects luminescence of ammonia luminophores less than the predetermined luminescence, disallowing ammonia flow between the canister interior and the exhaust after-treatment system.
  • FIG. 1 is a general schematic diagram of an internal combustion engine which utilizes SCR to convert NO x in engine exhaust by chemical reaction with ammonia introduced into the exhaust.
  • FIG. 2 is a schematic diagram showing more detail.
  • FIG. 3 is a schematic diagram similar to FIG. 2 but showing a different embodiment.
  • FIG. 1 shows a representative internal combustion engine 10 which can be used in stationary or mobile applications.
  • engine 10 may be a diesel engine of the type which propels a motor vehicle such as a truck and which comprises structure forming a number of engine cylinders 12 into which fuel is injected by fuel injectors 14 to combust with air which has entered combustion chamber spaces of engine cylinders 12 through an intake system 16 when cylinder intake valves 18 for controlling admission of air from an intake manifold 20 into respective engine cylinders 12 are open.
  • Engine 10 also comprises an exhaust system 22 through which engine exhaust created by combustion of injected fuel in the combustion chamber spaces to operate engine 10 is conveyed to atmosphere.
  • Cylinder exhaust valves 24 control admission of exhaust from respective engine cylinders 12 into an exhaust manifold 26 for further conveyance through exhaust system 22 .
  • Exhaust system 22 includes an exhaust after-treatment system 28 , including an SCR catalyst 30 for treating exhaust passing through after-treatment system 28 prior to entry into the atmosphere.
  • An ammonia dosing system 32 provides ammonia in gas phase for catalytic conversion of NO x in the exhaust.
  • Ammonia dosing system 32 comprises at least one ammonia storage canister 34 and an ammonia dosing controller 36 for controlling delivery of ammonia through an ammonia delivery apparatus 38 into after-treatment system 28 and for monitoring ammonia in the ammonia dosing system.
  • FIG. 2 shows one of the storage canisters 34 to comprise a walled enclosure 40 having a port 42 at one axial end via which the canister separably connects to ammonia delivery apparatus 38 .
  • Ammonia delivery apparatus 38 comprises a tubular conduit terminating is a fitting 44 to which port 42 separably connects.
  • Fitting 44 contains at least one optical sensor 46 and a selectively positionable closure 48 .
  • Canister 34 comprises an interior containing an ammonia storage medium 50 for storing ammonia in solid phase and releasing stored ammonia in gas phase when heated to an ammonia release temperature.
  • the stored ammonia comprises ammonia luminophores in quantity sufficient to provide for detection by at least one optical sensor 46 even when ammonia remaining in canister 34 reaches a point calling for canister replacement.
  • FIG. 2 shows at least one optical sensor 46 arranged to view luminescence of optically detectable ammonia within the canister's interior.
  • the at least one sensor 46 and any associated device or devices, such as a device 52 form a monitor 54 of ammonia luminophores.
  • Specific sensing capabilities of a particular monitor 54 are a function of specific optical sensing technique employed.
  • a monitor may have a capability extending beyond merely detecting the presence or absence of ammonia to a capability of measuring ammonia quantity and/or ammonia flow.
  • Device 52 functions to provide a signal distinguishing high luminescence of ammonia luminophores detected by the at least one optical sensor 46 and low luminescence of ammonia luminophores detected by the at least one optical sensor 46 .
  • Low luminescence includes no luminescence.
  • At least one sensor 46 which provides a measure of luminescence of ammonia luminophores which the at least one optical sensor 46 detects can enable monitor 54 to convert a measure of luminescence of ammonia luminophores which the at least one optical sensor 46 detects into a quantified measure of ammonia in canister 34 .
  • Monitor 54 can provide a signal alert when a quantified measure of ammonia is less than a predetermined quantity. This is useful in signaling that ammonia in a canister presently in use is approaching depletion and that a fresh canister should be brought on line.
  • ammonia dosing controller 36 positions closure 48 via an actuator (not shown) to allow ammonia flow between the canister interior and after-treatment system 28 .
  • ammonia dosing controller 36 positions closure 48 to disallow ammonia flow between the canister interior and the after-treatment system.
  • ammonia dosing controller 36 Because of the presence of at least one optical sensor 46 and closure 48 in association with ammonia dosing controller 36 , the presence of ammonia in a newly installed canister will be verified by at least one sensor 46 detecting luminescence of ammonia luminophores within the interior of the canister and consequently ammonia dosing controller 36 operating closure 48 to allow flow. If the presence of ammonia in a newly installed canister is not verified, ammonia dosing controller 36 maintains closure 48 in the same closed position which it had assumed when the previous canister was disconnected from fitting 44 to disallow flow.
  • FIG. 3 differs from that of FIG. 2 in that the at least one sensor 46 and closure 48 are mounted on canister port 42 rather than on fitting 44 . Both the least one sensor 46 and the actuator for operating closure 48 are to be connected to device 52 and ammonia dosing controller 36 as shown after port 42 has been connected to fitting 44 .

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Pathology (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Combustion & Propulsion (AREA)
  • Analytical Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
US13/273,455 2011-10-14 2011-10-14 Monitor of ammonia in dosing system Abandoned US20130091827A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US13/273,455 US20130091827A1 (en) 2011-10-14 2011-10-14 Monitor of ammonia in dosing system
CA2790368A CA2790368A1 (en) 2011-10-14 2012-09-19 Monitor of ammonia in dosing system
DE102012109077A DE102012109077A1 (de) 2011-10-14 2012-09-26 Wächter für Ammoniak in einem Dosiersystem
BR102012025996-6A BR102012025996A2 (pt) 2011-10-14 2012-10-10 Monitor de amônia em sistema de dosagem
SE1251150A SE1251150A1 (sv) 2011-10-14 2012-10-11 Övervakning av ammoniak i doseringssystem
CN2012103886369A CN103046990A (zh) 2011-10-14 2012-10-12 氨配量系统中的监视器
MX2012011999A MX2012011999A (es) 2011-10-14 2012-10-12 Monitor de amoniaco en sistema de dosificacion.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/273,455 US20130091827A1 (en) 2011-10-14 2011-10-14 Monitor of ammonia in dosing system

Publications (1)

Publication Number Publication Date
US20130091827A1 true US20130091827A1 (en) 2013-04-18

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US13/273,455 Abandoned US20130091827A1 (en) 2011-10-14 2011-10-14 Monitor of ammonia in dosing system

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US (1) US20130091827A1 (es)
CN (1) CN103046990A (es)
BR (1) BR102012025996A2 (es)
CA (1) CA2790368A1 (es)
DE (1) DE102012109077A1 (es)
MX (1) MX2012011999A (es)
SE (1) SE1251150A1 (es)

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Publication number Priority date Publication date Assignee Title
CN104344869A (zh) * 2013-07-30 2015-02-11 中国第一汽车股份有限公司 固体储氨系统的剩余氨气量的光电检测方法
CN103410593B (zh) * 2013-07-30 2017-03-15 中国第一汽车股份有限公司 固体储氨系统的剩余氨气量的激光检测方法
CN103541796B (zh) * 2013-10-30 2016-03-09 中国第一汽车股份有限公司 固体储氨系统的氨气计量方法
CN103541798B (zh) * 2013-10-30 2016-05-04 中国第一汽车股份有限公司 基于质量流量计的固体储氨系统的剩余氨气量的检测方法
CN112739890B (zh) * 2018-09-21 2022-11-11 康明斯排放处理公司 在后处理系统中对nox和氨的光学感测
CN119712292B (zh) * 2025-02-26 2025-05-09 屹马汽车零部件(江苏)有限公司 一种排气口尿素结晶检测机构及检测方法

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Publication number Priority date Publication date Assignee Title
US3904371A (en) * 1974-03-04 1975-09-09 Beckman Instruments Inc Chemiluminescent ammonia detection
JPS5885155A (ja) * 1981-11-14 1983-05-21 Kimoto Denshi Kogyo Kk ガス中の窒素化合物の濃度測定方法
JP2001021546A (ja) * 1999-07-02 2001-01-26 Horiba Ltd アンモニア態窒素および硝酸／亜硝酸態窒素ならびに全窒素の分析方法
JP3687917B2 (ja) * 2003-10-31 2005-08-24 日産ディーゼル工業株式会社 液体還元剤の濃度及び残量検出装置
DE102004050023A1 (de) * 2004-10-13 2006-04-27 L'orange Gmbh Einrichtung zur dosierten Einspritzung eines Reduktionsmittels in den Abgastrakt einer Brennkraftmaschine
US7954312B2 (en) * 2007-05-09 2011-06-07 Ford Global Technologies, Llc Approach for detecting reductant availability and make-up

Also Published As

Publication number Publication date
CA2790368A1 (en) 2013-04-14
BR102012025996A2 (pt) 2014-08-19
CN103046990A (zh) 2013-04-17
MX2012011999A (es) 2013-05-10
SE1251150A1 (sv) 2013-04-15
DE102012109077A1 (de) 2013-04-18

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