US20090126349A1 - Exhaust emission control device - Google Patents
Exhaust emission control device Download PDFInfo
- Publication number
- US20090126349A1 US20090126349A1 US12/274,670 US27467008A US2009126349A1 US 20090126349 A1 US20090126349 A1 US 20090126349A1 US 27467008 A US27467008 A US 27467008A US 2009126349 A1 US2009126349 A1 US 2009126349A1
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- US
- United States
- Prior art keywords
- temperature
- additive agent
- exhaust
- control device
- emission control
- 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
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0408—Methods of control or diagnosing using a feed-back loop
-
- 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
- F01N2900/1811—Temperature
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
An exhaust emission control device reduces nitrogen oxide included in exhaust air from an internal combustion engine. The device includes an exhaust pipe, a catalyst, a supply device, a tank, and a temperature regulating device. The exhaust pipe defines a passage for exhaust air discharged from the engine. The catalyst is disposed in the exhaust pipe. The catalyst is capable of promoting reduction reaction of the nitrogen oxide in exhaust air. The supply device is for supplying a fluid-state additive agent, which is used for the reduction reaction, to an upstream side of the catalyst in a flow direction of exhaust air. The additive agent is stored in the tank. The temperature regulating device is for regulating temperature of the additive agent, which is supplied by the supply device, to be in a predetermined range.
Description
- This application is based on and incorporates herein by reference Japanese Patent Application No. 2007-301761 filed on Nov. 21, 2007.
- 1. Field of the Invention
- The present invention relates to an exhaust emission control device for reducing a nitrogen oxide included in exhaust air of an internal combustion engine such as a diesel engine, and the invention is effectively applied to vehicles.
- 2. Description of Related Art
- According to an exhaust emission control device for reducing a nitrogen oxide (NOx) included in exhaust air of an internal combustion engine such as a diesel engine, the nitrogen oxide is purified (reduced) by providing in an exhaust pipe a catalyst that promotes a reduction reaction and by injecting an additive agent such as a urea water solution into exhaust air flowing into the catalyst (see, for example, JP2003-293739A).
- More specifically, Urea (CO(NH2)2) injected into exhaust air is hydrolyzed by exhaust heat (CO(NH2)2+H2O→2NH3+CO2) to generate ammonia (NH3), which is a reducing agent. Then, the nitrogen oxide is reduced by reaction between the nitrogen oxide and the ammonia through the catalyst.
- According to the exhaust emission control device of JP2003-293739A, an amount of the additive agent supplied is regulated by a flow control valve. When temperature changes, viscosity or density of a fluid-state additive agent, such as a urea water solution, changes in accordance with the temperature change. Accordingly, even though a degree of opening or opened duration of the flow control valve is constant, the amount of the additive agent (amount of substance) actually supplied varies with temperature.
- When the supplied amount of the additive agent is smaller than a required amount of the additive agent, the nitrogen oxide cannot fully be reduced, and thereby a purifying rate of exhaust air decreases. On the other hand, when the supplied amount of the additive agent is larger than a required amount of the additive agent, the additive agent is consumed more than needed. Accordingly, operation cost of the exhaust emission control device increases.
- Thus, when the temperature of the additive agent changes, a difference between the amount the additive agent supplied, which is set as control target value, and the actual amount of supply becomes large. Accordingly, the exhaust emission control device may not be operated efficiently.
- The present invention addresses the above disadvantages. Thus, it is an objective of the present invention to efficiently operate an exhaust emission control device.
- To achieve the objective of the present invention, there is provided an exhaust emission control device for reducing nitrogen oxide included in exhaust air from an internal combustion engine. The device includes an exhaust pipe, a catalyst, a supply means, a tank, and a temperature regulating means The exhaust pipe defines a passage for exhaust air discharged from the engine. The catalyst is disposed in the exhaust pipe. The catalyst is capable of promoting reduction reaction of the nitrogen oxide in exhaust air. The supply means is for supplying a fluid-state additive agent, which is used for the reduction reaction, to an upstream side of the catalyst in a flow direction of exhaust air. The additive agent is stored in the tank. The temperature regulating means is for regulating temperature of the additive agent, which is supplied by the supply means, to be in a predetermined range.
- The invention, together with additional objectives, features and advantages thereof, will be best understood from the following description, the appended claims and the accompanying drawings in which:
-
FIG. 1 is a schematic diagram illustrating an exhaust emission control device according to an embodiment of the invention; and -
FIG. 2 is a flowchart illustrating characteristic workings of the exhaust emission control device according to the embodiment. - An embodiment is an application of an exhaust emission control device of the invention to a urea SCR (Selective Catalytic Reduction) system of a diesel engine for vehicles. The embodiment is described below with reference to the drawings.
- As shown in
FIG. 1 , anexhaust pipe 2 defines a passage for exhaust air discharged from a dieselinternal combustion engine 1. An SCR catalyst 3 (hereinafter referred to as catalyst 3), which promotes reduction reaction of nitrogen oxide in exhaust air, and a DPF (Diesel Particulate Filter) 4 for capturing particulate matter such as soot contained in exhaust air are provided in theexhaust pipe 2. TheDPF 4 is located on an upstream side (engine side) of thecatalyst 3 in an exhaust flow direction. - A
supply valve 5 is a supply means for supplying a fluid-state additive agent (urea water solution in the present embodiment) used for the reduction reaction to theexhaust pipe 2 on the upstream side of thecatalyst 3 in the exhaust flow direction. An additive-agent tank 6 is a tank means for storing the additive agent supplied to theexhaust pipe 2. - An additive-
agent pump 7 is a pump means for pumping the additive agent stored in the additive-agent tank 6 to thesupply valve 5. Aregulator 7A is a pressure regulating means for returning the additive agent into the additive-agent tank 6 when a pressure of the additive agent discharged from the additive-agent pump 7 is higher than a predetermined pressure. - A
filter 8 is a removing means for capturing and removing foreign substances in the additive agent. Thefilter 8 is provided in apipe 8A leading the additive agent discharged from the additive-agent pump 7 to thesupply valve 5. Afirst heater 9, which heats the additive agent in thepipe 8A when provided with supply of electric power from an in-vehicle battery (not shown), is disposed on an upstream side of thefilter 8. - A
second heater 10, which heats the additive agent in the additive-agent tank 6 using waste heat recovered from theinternal combustion engine 1, that is, cooling water of theinternal combustion engine 1 as its heat source, is disposed in the additive-agent tank 6. Aflow control valve 11, which regulates an amount of the cooling water supplied to thesecond heater 10, is disposed in apipe 10A, through which the cooling water is supplied to thesecond heater 10. - A
first temperature sensor 12A is a temperature detecting means for detecting temperature of the additive agent in the additive-agent tank 6. Asecond temperature sensor 12B is a temperature detecting means for detecting temperature of the additive agent in thepipe 8A. A third temperature sensor 12C is a temperature detecting means for detecting temperature of the additive agent in thesupply valve 5. Afourth temperature sensor 12D is a temperature detecting means for detecting temperature of the cooling water. - The
second temperature sensor 12B detects the temperature of the additive agent on thepipes 8A on an upstream side of thefirst heater 9. The third temperature sensor 12C detects the temperature of the additive agent at an end portion of thesupply valve 5 near its injection tip (not shown). Thefourth temperature sensor 12D detects the temperature of the cooling water on an upstream side of theflow control valve 11. - An electronic control unit (hereinafter referred to as ECU) 13 is a control means for controlling a degree of opening of the
supply valve 5, an energizing amount of thefirst heater 9, and a degree of opening of theflow control valve 11 TheECU 13 is a widely-known microcomputer including a central processing unit (CPU) 13A, a random access memory (RAM) 13B, and a read-only memory (ROM) 13C. A program for controlling thesupply valve 5 and the like is stored in theROM 13C of theECU 13. - Detection temperatures of the first to
fourth temperature sensors 12A-12D are inputted into theECU 13. Based. on the detection temperatures, theECU 13 controls the energizing amount of thefirst heater 9 and the degree of opening of theflow control valve 11, such that the temperature of the additive agent supplied to thesupply valve 5 is in a predetermined temperature range (in the present embodiment, a predefined temperature ranging from 60° C. to a boiling point (103° C.) of urea). - An
exhaust temperature sensor 14 is a temperature detecting means for detecting the temperature of exhaust air discharged from theinternal combustion engine 1. ANOx sensor 15 is a NOx detecting means for detecting the nitrogen oxide included in exhaust air which has passed through thecatalyst 3. - The exhaust emission control device hydrolyzes (CO(NH2)2+H2O→2NH3+CO2) urea (CO(NH2)2), which is the additive agent injected into exhaust air, using exhaust heat so as to generate ammonia (NH3), which is a reducing agent. Then, the exhaust emission control device causes reaction between the nitrogen oxide and the ammonia through the
catalyst 3 so as to purify (reduce) the nitrogen oxide. - In order to hydrolyze urea, the temperature of exhaust air may be equal to or higher than 175° C. When the temperature of exhaust air is equal to or higher than 175° C., the nitrogen oxide is efficiently purified (reduced).
- As shown in
FIG. 2 , the exhaust emission control device (thesupply valve 5 and the additive-agent pump 7) is started at the same time as starting of theinternal combustion engine 1. The amount of the additive agent supplied is controlled (hereinafter referred to as normal control) normally, based on the temperature of exhaust air discharged from theinternal combustion engine 1, the amount of the nitrogen oxide contained in the exhaust air, and the like. - The control (hereinafter referred to as additive agent temperature control) in
FIG. 2 is started at the same time as the normal control and is performed independently of the normal control. According to the control shown inFIG. 2 , as described above, in brief, the energizing amount of thefirst heater 9 and the degree of opening of theflow control valve 11 are controlled, such that the temperature of the additive agent supplied to thesupply valve 5 is in the predetermined temperature range The processing is explained below in detail with reference toFIG. 2 . - When the additive agent temperature control is started, it is determined whether any of additive-agent temperatures which the
first temperature sensor 12A to the third temperature sensor 12C have detected is equal to or lower than a first predetermined temperature T1 (60° C. in the present embodiment) (S1). If it is determined that any of the additive-agent temperatures is equal to or lower than the first predetermined temperature T1 (S:YES), the energization of thefirst heater 9 is started, and theflow control valve 11 is opened and thereby water starts to flow through the second heater 10 (S2). - If it is determined that all of the additive-agent temperatures, which the
first temperature sensor 12A to the third temperature sensor 12C have detected, are higher than the first predetermined temperature T1 (S:NO), or when the energization of thefirst heater 9 is started and theflow control valve 11 is opened (S2), it is determined whether any of the additive-agent temperatures which thefirst temperature sensor 12A to the third temperature sensor 12C have detected is equal to or higher than a second predetermined temperature T2 (80° C. in the present embodiment) that is higher than the first predetermined temperature T1 (S3). - If it is determined that any of the additive-agent temperatures which the
first temperature sensor 12A to the third temperature sensor 12C have detected is equal to or higher than the second predetermined temperature T2 (S3:YES), the energization of thefirst heater 9 is stopped, and theflow control valve 11 is closed, thereby stopping the flow of water through the second heater 10 (S4). - If it is determined that all of the additive-agent temperatures which the
first temperature sensor 12A to the third temperature sensor 12C have detected are lower than the second predetermined temperature T2 (S3:NO), or after the energization of thefirst heater 9 is stopped and theflow control valve 11 is closed (S4), the processing SI is performed again after a certain time elapses (S5). - In the present embodiment, the temperature of the additive agent supplied to the
supply valve 5 is regulated to be in a predetermined temperature range. Accordingly, temperature change of the additive agent is made small. - As a result, a difference between the amount of the additive agent supplied set as the control target value and the actual amount of supply is made small. Therefore, the exhaust emission control device is efficiently operated.
- When urea is used as the additive agent, as described above, urea is hydrolyzed using exhaust heat to generate ammonia, which is a reducing agent. Accordingly, when the temperature of the additive agent (urea) is low, the temperature of exhaust air is lowered. Thus, the hydrolysis reaction of the additive agent may be retarded.
- In the present embodiment, the temperature of the additive agent is regulated to range from 60° C. to the boiling point of urea. Accordingly, the decrease in the exhaust-gas temperature is limited, and the retardation of the hydrolysis reaction of the additive agent is prevented.
- Because ambient temperature such as in the nighttime lowers greatly in a cold district , so that the additive agent stored in the additive-
agent tank 6 is frozen or turned into a sherbet form, it is highly possible that the additive agent cannot be supplied to theexhaust pipe 2 particularly at the time of cold starting. - In order to address the above problem, a heating means for heating the additive agent stored in the additive-
agent tank 6 would resolve the problem. Nevertheless, when another heating means is newly provided in addition to thesecond heater 10 for keeping the temperature of the additive agent in the predetermined temperature range, increased manufacturing costs of the exhaust emission control device are caused. - In the present embodiment, however, by heating the additive agent stored in the additive-
agent tank 6 using thesecond heater 10, the temperature of the additive agent is regulated to be in the predetermined temperature range, which is a feature of the present embodiment. Accordingly, thesecond heater 10 also serves as the above heating means. - As a result, in the present embodiment, the increased manufacturing costs of the exhaust emission control device are limited, and the exhaust emission control device is operated efficiently. In the present embodiment, the
second heater 10 uses waste heat of theinternal combustion engine 1 as its heat source. Accordingly, the heat source for heating does not need to be newly provided. Therefore, the increased manufacturing costs of the exhaust emission control device are limited, and the exhaust emission control device is operated efficiently. - In the present embodiment, the
supply valve 5 corresponds to the “supply means”, the additive-agent tank 6 corresponds to the “tank”, and thefirst heater 9, thesecond heater 10, theflow control valve 11, and theECU 13 constitute a “temperature regulating means”. - In the above embodiment, the
first heater 9 and thesecond heater 10 serve as the temperature regulating means. However, the invention is not limited to the above. That is, one of thefirst heater 9 and thesecond heater 10 may not be used, or another heater may serve as the temperature regulating means. - In the above embodiment, the energization of the
first heater 9 and passing water through thesecond heater 10 are controlled in a binary manner (ON-OFF). However, the invention is not limited to the above. That is, the temperature of the additive agent may be controlled by continuously varying the energizing amount and the passing water amount. - In the above embodiment, urea is used as an additive agent. However, the invention is not limited to the above. That is, a reducing agent other than ammonia, or an additive agent that generates this reducing agent may be used.
- Additional advantages and modifications will readily occur to those skilled in the art. The invention in its broader terms is therefore not limited to the specific details, representative apparatus, and illustrative examples shown and described.
Claims (4)
1. An exhaust emission control device for reducing nitrogen oxide included in exhaust air from an internal combustion engine, the device comprising:
an exhaust pipe defining a passage for exhaust air discharged from the engine;
a catalyst disposed in the exhaust pipe, the catalyst being capable of promoting reduction reaction of the nitrogen oxide in exhaust air;
a supply means for supplying a fluid-state additive agent, which is used for the reduction reaction, to an upstream side of the catalyst in a flow direction of exhaust air;
a tank in which the additive agent is stored; and
a temperature regulating means for regulating temperature of the additive agent, which is supplied by the supply means, to be in a predetermined range.
2. The exhaust emission control device according to claim 1 , wherein:
the additive agent is urea; and
the temperature regulating means regulates the temperature of the additive agent to be a temperature ranging from 60° C. to a boiling point of urea.
3. The exhaust emission control device according to claim 1 , wherein the temperature regulating means regulates the temperature of the additive agent to be in the predetermined range by heating the additive agent, which is stored in the tank.
4. The exhaust emission control device according to claim 1 , wherein the temperature regulating means regulates the temperature of the additive agent to be in the predetermined range by heating the additive agent using waste heat recovered from the engine as a heat source.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007-301761 | 2007-11-21 | ||
JP2007301761A JP4445001B2 (en) | 2007-11-21 | 2007-11-21 | Exhaust purification device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090126349A1 true US20090126349A1 (en) | 2009-05-21 |
Family
ID=40577251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/274,670 Abandoned US20090126349A1 (en) | 2007-11-21 | 2008-11-20 | Exhaust emission control device |
Country Status (3)
Country | Link |
---|---|
US (1) | US20090126349A1 (en) |
JP (1) | JP4445001B2 (en) |
DE (1) | DE102008043897A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110167805A1 (en) * | 2010-08-17 | 2011-07-14 | Ford Global Technologies, Llc | Method for reducing urea deposits in an aftertreatment system |
WO2012079708A1 (en) * | 2010-12-17 | 2012-06-21 | Daimler Ag | Metering arrangement and method for operating a metering arrangement |
CN103748326A (en) * | 2011-05-23 | 2014-04-23 | 英瑞杰汽车系统研究公司 | Additive delivery system and method for controlling said system |
US20140199212A1 (en) * | 2013-01-11 | 2014-07-17 | Joseph Voegele Ag | Construction machine with heat management system |
US10393694B2 (en) | 2012-11-20 | 2019-08-27 | Denso Corporation | Gas sensor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT202000003080A1 (en) * | 2020-02-17 | 2021-08-17 | Irca Spa | SYSTEM FOR HEATING A SUBSTANCE IN A CAR |
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JP2003293739A (en) | 2002-04-02 | 2003-10-15 | Mitsubishi Fuso Truck & Bus Corp | NOx CLEANING DEVICE FOR INTERNAL COMBUSTION ENGINE |
-
2007
- 2007-11-21 JP JP2007301761A patent/JP4445001B2/en not_active Expired - Fee Related
-
2008
- 2008-11-19 DE DE102008043897A patent/DE102008043897A1/en not_active Ceased
- 2008-11-20 US US12/274,670 patent/US20090126349A1/en not_active Abandoned
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110167805A1 (en) * | 2010-08-17 | 2011-07-14 | Ford Global Technologies, Llc | Method for reducing urea deposits in an aftertreatment system |
US9273576B2 (en) | 2010-08-17 | 2016-03-01 | Ford Global Technologies, Llc | Method for reducing urea deposits in an aftertreatment system |
WO2012079708A1 (en) * | 2010-12-17 | 2012-06-21 | Daimler Ag | Metering arrangement and method for operating a metering arrangement |
US20130327407A1 (en) * | 2010-12-17 | 2013-12-12 | Daimler Ag | Metering Arrangement and Method for Operating a Metering Arrangement |
US9695726B2 (en) * | 2010-12-17 | 2017-07-04 | Daimler Ag | Metering arrangement and method for operating a metering arrangement |
CN103748326A (en) * | 2011-05-23 | 2014-04-23 | 英瑞杰汽车系统研究公司 | Additive delivery system and method for controlling said system |
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US20140199212A1 (en) * | 2013-01-11 | 2014-07-17 | Joseph Voegele Ag | Construction machine with heat management system |
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Also Published As
Publication number | Publication date |
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JP2009127473A (en) | 2009-06-11 |
JP4445001B2 (en) | 2010-04-07 |
DE102008043897A1 (en) | 2009-05-28 |
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