US20070251226A1 - Liquid Supply Device for Exhaust Gas Post-Treatment Device - Google Patents

Liquid Supply Device for Exhaust Gas Post-Treatment Device Download PDF

Info

Publication number
US20070251226A1
US20070251226A1 US11/568,256 US56825605A US2007251226A1 US 20070251226 A1 US20070251226 A1 US 20070251226A1 US 56825605 A US56825605 A US 56825605A US 2007251226 A1 US2007251226 A1 US 2007251226A1
Authority
US
United States
Prior art keywords
pipe
liquid
exhaust gas
tank
temperature sensor
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
US11/568,256
Other languages
English (en)
Inventor
Junichi Kaneko
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.)
Bosch Corp
Original Assignee
Bosch Corp
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
Application filed by Bosch Corp filed Critical Bosch Corp
Assigned to BOSCH CORPORATION reassignment BOSCH CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANEKO, JUNICHI
Publication of US20070251226A1 publication Critical patent/US20070251226A1/en
Abandoned legal-status Critical Current

Links

Images

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 ; 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
    • 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
    • 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, e.g. for catalytic activity
    • 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
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/05—Systems for adding substances into 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
    • 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
    • F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
    • 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
    • F01N2610/14—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
    • 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
    • F01N2900/12—Parameters used for exhaust control or diagnosing said parameters being related to the vehicle exterior
    • 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
    • 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

Definitions

  • the present invention relates to a liquid supply device for an exhaust gas post-treatment device.
  • JP-3022601 an exhaust gas post-treatment system which sprays an urea water solution into an exhaust gas through a nozzle and purifies the exhaust gas by using a catalytic conversion action. This technique is basically based on a selective catalytic reduction process, and the urea water solution is used in place of ammonia as a reducing agent for catalytic conversion of nitrogen oxide.
  • This type of a liquid supply device is configured such that the liquid in the inside of the storing tank is fed to a pump module through a liquid supply pipe, the liquid is pressurized in the pump module, and is sprayed into an exhaust pipe. Since a temperature of the liquid supply pipe also becomes the outside air temperature outside a vehicle, there exists a fear that the liquid is also frozen in the inside of the liquid supply pipe. However, since the liquid supply pipe is mounted on a vehicle in an assembly line of a vehicle body in conformity with a type of the vehicle based on the different specification, a thermal sensor is not mounted on the pipe. Accordingly, conventionally, a heating control of the liquid supply pipe is performed using information from a temperature sensor for detecting the temperature of the liquid in the inside of the storage tank thus performing a heat insulation control to prevent the liquid from being frozen in the inside of the pipe.
  • an operation to set the heater in an OFF mode when the temperature in the inside of the storage tank exceeds a threshold value and an operation to set the heater in a heat insulation mode when the temperature in the inside of the storage tank becomes lower than the threshold value are repeated.
  • the heater is driven with a pulse current in the respective modes and a method for calculating a drive duty ratio has the following two options and these modes can be selected by data setting.
  • the drive duty ratio is obtained based on a value of an ambient temperature.
  • the drive duty ratio is obtained based on the temperature of the liquid in the storage tank and temperature of the liquid in the pressuring pump.
  • the present invention provides a liquid supply device for an exhaust gas post-treatment device which supplies liquid stored in the inside of a tank to an exhaust gas purifying device through a pipe, and thermally maintains the liquid using a thermally-maintaining device after thawing the liquid in the inside of the tank, wherein the thermally-maintaining device includes a tank temperature sensor which detects a temperature in the inside of the tank, an ambient temperature sensor which detects an ambient temperature, a heater which heats the pipe, a selecting part which selects either one of an output of the ambient temperature sensor and an output of the tank temperature sensor based on a flow state of the liquid in the inside of the pipe and a driving part which supplies a current for thermal-maintenance necessary for thermal-maintenance to the heater in response to the output from the selecting part.
  • the thermally-maintaining device includes a tank temperature sensor which detects a temperature in the inside of the tank, an ambient temperature sensor which detects an ambient temperature, a heater which heats the pipe, a
  • a current which flows in the heater is controlled based on the output of the desired sensor out of the tank temperature sensor and the ambient temperature sensor, and whether the liquid flows in the inside of the pipe and hence, the thermal-maintenance of the pipe can be appropriately performed.
  • FIG. 1 is a constitutional view showing one example of a liquid supply device for an exhaust gas post-treatment device according to the present invention.
  • FIG. 2 is a detailed constitutional view of a thermal-maintaining device shown in FIG. 1 .
  • FIG. 1 is a constitutional view showing one example of a liquid supply device for an exhaust gas post-treatment device according to the present invention.
  • a liquid supply device 1 is a device for supplying urea water solution in the exhaust gas post-treatment, and includes a tank 2 for storing the urea water solution U and a pipe 3 for introducing the urea water solution U in the tank 2 into an exhaust gas post-treatment device 100 .
  • the exhaust gas post-treatment device 100 is mounted on an exhaust pipe 101 , and the urea water solution U is injected into and is supplied to the inside of the exhaust pipe 101 through an injection nozzle 4 which is mounted on a distal end portion of the pipe 3 at an upstream side of the exhaust gas post-treatment device 100 .
  • a pump 5 for pressurizing the urea water solution U and a dosing valve 6 are mounted on a middle portion of the pipe 3 .
  • the dosing valve 6 is connected to an air reservoir 7 by way of a pipe 8 , and by performing an open/close control of a shut-off valve 9 which is mounted on the pipe 8 , the supply of compressed air to the dosing valve 6 can be controlled.
  • Numeral 10 indicates a relief valve.
  • a return pipe 12 having a relief valve 11 is provided between the tank 2 and the dosing valve 6 . An extra amount of the urea water solution U which is fed to the dosing valve 6 by way of the pipe 3 is returned to the tank 2 by way of the relief valve 11 .
  • a pressure sensor 20 for measuring pressure is mounted on the pipe in the vicinity of the pump 5 and is used to confirm the injection pressure or the like. Further, the dosing valve 6 and the shut-off valve 9 are configured to perform predetermined operations in response to control signals C 1 , C 2 from respective control units not shown in drawings.
  • a thawing and thermal-maintaining device 30 To thaw the urea water solution U in the tank 2 when the urea water solution U is frozen and, at the same time, to thermally maintain the tank 2 for preventing the urea water solution U from being frozen, a thawing and thermal-maintaining device 30 is provided.
  • the thawing and thermal-maintaining device 30 includes a cooling water pipe 13 for circulating cooling water for an engine not shown in drawings in the inside of the tank 2 , a shut-off valve 14 which is mounted on the cooling water pipe 13 , and a first control unit 15 for performing an ON-OFF control of the shut-off valve 14 to control the circulation of the cooling water in the inside of the cooling water pipe 13 .
  • a tank temperature signal S 1 is inputted from a tank temperature sensor 16 for detecting a temperature of the urea water solution U in the inside of the tank 2 .
  • the first control unit 15 determines whether the urea water solution U in the inside of the tank 2 is frozen or not in response to the tank temperature signal S 1 , and a thawing and thermal-maintaining control signal M 1 which is outputted for thawing and thermal-maintaining from the first control unit 15 in accordance with a result of the determination is inputted into the shut-off valve 14 . Accordingly, the ON-OFF control of the shut-off valve 14 is performed in response to the thawing and thermal-maintaining control signal M 1 and hence, the supply of the cooling water to the cooling water pipe 13 is adjusted thus performing the thawing and thermal-maintenance of the urea water solution U in the inside of the tank 2 .
  • the liquid supply device 1 further includes a thermal-maintaining device 40 which performs a thermal-maintaining operation for preventing the urea water solution U in the inside of the pipe 3 from being frozen again after the urea water solution U in the inside of the tank 2 thaws and flows in the inside of the pipe 3 .
  • a thermal-maintaining device 40 which performs a thermal-maintaining operation for preventing the urea water solution U in the inside of the pipe 3 from being frozen again after the urea water solution U in the inside of the tank 2 thaws and flows in the inside of the pipe 3 .
  • the thermal-maintaining device 40 includes a heater 17 A for heating the pipe 3 and a heater 17 B for heating a return pipe 12 .
  • the heaters 17 A, 17 B are constituted as electric heaters.
  • the thermal-maintaining device 40 includes a second control unit 19 to which the tank temperature signal S 1 from the tank temperature sensor 16 , an ambient temperature signal S 2 which is outputted from an ambient temperature sensor 18 for detecting the ambient temperature of the liquid supply device 1 and indicates an ambient temperature and a thawing and thermal-maintaining control signal M 1 are inputted.
  • a drive current Y necessary for performing desired heating is supplied from the second control unit 19 to the heaters 17 A, 17 B.
  • FIG. 2 is a detailed constitutional view of the thermal-maintaining device 40 .
  • the thermal-maintaining device 40 includes a selecting part 50 to which the tank temperature signal S 1 and the ambient temperature signal S 2 are inputted and which selects and output either one of the above-mentioned signals in response to a target-injection-quantity signal for controlling a quantity of the urea water solution U in the inside of the pipe 3 , and a drive part 60 which supplies the drive current Y necessary for thermally maintaining the pipe 3 to the heaters 17 A, 17 B in response to an output signal S 3 from the selecting part 50 .
  • the drive current Y adopts a pulse current mode in which a duty ratio of the current is determined in a manner described later.
  • the second control unit 19 shown in FIG. 1 is constituted of the selecting part 50 and the drive part 60 .
  • the selecting part 50 includes a detecting part 51 for detecting whether the urea water solution U flows in the inside of the pipe 3 or not in response to the target-injection-quantity signal and a lapsed time, and a first switch part 52 for selecting either one of the tank temperature signal S 1 or the ambient temperature signal S 2 in response to a detection output signal SK from the detecting part 51 and outputs the selected signal as the output signal S 3 .
  • the detecting part 51 is provided for detecting a flow state of the urea water solution U in the inside of the pipe 3 . In the detecting part 51 , when a detection result that the urea water solution U does not flow in the inside of the pipe 3 is obtained, the ambient temperature signal S 2 is selected. In the detecting part 51 , when a detection result that the urea water solution U flows in the inside of the pipe 3 is obtained, the tank temperature signal S 1 is selected.
  • the drive part 60 includes a map arithmetic operation part 61 which responds to the output signal S 3 and performs a map arithmetic operation of a duty ratio of the drive current Y in accordance with a temperature indicated by the output signal S 3 .
  • the duty ratio data D 1 indicative of the arithmetic operation result is outputted from the map arithmetic operation part 61 , and the duty ratio data D 1 is inputted to a second switch part 62 .
  • Numeral 63 indicates a data outputting part which outputs a fixed data D 2 indicative of a duty ratio 1 , and the fixed data D 2 is also inputted to the second switch part 62 .
  • the thawing and thermal-maintaining control signal M 1 is inputted to the second switch part 62 from the first control unit 15 as a switching control signal.
  • the thawing and thermal-maintaining control signal M 1 is inputted, that is, when the first control unit 15 performs a control for turning on the shut-off valve 14 so as to perform thawing
  • the fixed data D 2 is selected by the second switch part 62 , while in cases other than the above-mentioned case, the duty ratio data D 1 is selected.
  • Either data selected in the above-mentioned manner is supplied to a drive current output part 64 from the second switch part 62 as output data D 3 .
  • Numeral 65 indicates a determination part which determines whether the thawing or the thermal-maintaining of the urea water solution U in the inside of the pipe 3 and the return pipe 12 using the heaters 17 A, 17 B is necessary or not.
  • the determination part 65 determines whether either one of the tank temperature signal S 1 or the ambient temperature signal S 2 indicates a urea-water freezing temperature or below or not.
  • the determination data D 4 indicative of the determination result of the determination part 65 is transmitted to the drive current output part 64 .
  • the drive current output part 64 is configured to output the drive current Y of the duty ratio which conforms to the output data D 3 only when the determination part 65 determines that it is necessary to thaw or thermally maintain the urea water solution U in the inside of the pipe 3 and the return pipe 12 .
  • the thermal-maintaining device 40 has the above-mentioned constitution, when the second switch part 62 selects the fixed data D 2 in response to the thawing-and-thermal-maintaining control signal M 1 , the drive current Y of the duty ratio 1 is outputted from the drive current output part 64 , and the pipe 3 and the return pipe 12 are heated by the heaters 17 A, 17 B for thawing the urea water solution U in the pipe 3 and the return pipe 12 .
  • a thawing state can be detected by whether a pressure change of the urea water solution is observed by the pressure sensor 20 or not when the pump 5 is operated and, at the same time, the relief valve 11 for the extra amount of the urea water solution U is operated.
  • the second switch part 62 selects the duty-ratio data D 1 . Further, only when the determination part 65 determines that the thawing or the thermal-maintaining for the pipe 3 is necessary, the drive current Y of the duty ratio which conforms to the duty-ratio data D 1 is supplied to the heaters 17 A, 17 B as a current for thermal-maintaining.
  • the first switch part 52 selects the tank temperature signal S 1 when the urea water solution U flows in the inside of the pipe 3 , the drive current Y of the duty ratio which conforms to the temperature of the urea water solution U in the inside of the tank 2 is outputted after the thawing operation. Accordingly, when the urea water solution U flows in the inside of the pipe 3 after thawing, the temperature of the urea water solution U in the inside of the tank 2 and the temperature of the urea water solution U in the inside of the pipe 3 become substantially equal and hence, the extremely appropriate thermal-maintaining operation is guaranteed.
  • the detecting part 51 promptly detects that the flow of the urea water solution U in the inside of the pipe 3 is stopped in response to the target-injection-quantity signal, and hence, the first switch part 52 is changed over to transmit the ambient temperature signal S 2 to the drive part 60 as the output signal S 3 . Further, the drive current Y of the duty ratio which conforms to the detected ambient temperatures is given to the heaters 17 A, 17 B which conform to the ambient temperature signal S 2 .
  • the map data characteristics are set such that the value of the duty-ratio data D 1 outputted from the map arithmetic operation part 61 becomes larger corresponding to the lowering of the inputted temperature. Since the ambient temperature is lower than the temperature in the inside of the tank 2 in general, when the flow of the urea water solution U in the inside of the pipe 3 is stopped, the drive current Y of the larger duty-ratio is supplied to the heaters 17 A, 17 B whereby the heating of the pipe 3 and the return pipe 12 is accelerated. In this manner, the thermal-maintaining of the pipe 3 and the return pipe 12 can be performed appropriately depending on the situation, and the overheating and the refreezing of the pipe 3 and the return pipe 12 can be effectively prevented. In this manner, during a period in which the liquid supply device 1 is operated, the injection failure of the urea water solution can be effectively prevented thus enabling the excellent thermal-maintaining operation.
  • either one of the duty-ratio data D 1 or the fixed data D 2 is selected in response to the thawing and thermal-maintaining control signal M 1 .
  • the thawing operation of the pipe 3 is performed by another device, it may be possible to directly supply the duty-ratio data D 1 to the drive current output part 64 .
  • the present invention it is possible to smoothly supply the liquid for an exhaust gas post-treatment device and hence the present invention is useful for improving a liquid supply device for an exhaust gas post-treatment device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
US11/568,256 2004-04-30 2005-04-14 Liquid Supply Device for Exhaust Gas Post-Treatment Device Abandoned US20070251226A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2004135450A JP4137838B2 (ja) 2004-04-30 2004-04-30 排気ガス後処理装置用液体供給装置
JP2004-135450 2004-04-30
PCT/JP2005/007567 WO2005106220A1 (ja) 2004-04-30 2005-04-14 排気ガス後処理装置用液体供給装置

Publications (1)

Publication Number Publication Date
US20070251226A1 true US20070251226A1 (en) 2007-11-01

Family

ID=35241737

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/568,256 Abandoned US20070251226A1 (en) 2004-04-30 2005-04-14 Liquid Supply Device for Exhaust Gas Post-Treatment Device

Country Status (6)

Country Link
US (1) US20070251226A1 (ja)
EP (1) EP1741887B1 (ja)
JP (1) JP4137838B2 (ja)
KR (1) KR100805096B1 (ja)
CN (1) CN100451304C (ja)
WO (1) WO2005106220A1 (ja)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100095653A1 (en) * 2008-10-22 2010-04-22 Caterpillar Inc. System and method for heating a reducing agent associated with a reducing agent distribution system
US20100122521A1 (en) * 2008-11-19 2010-05-20 Caterpillar Inc. Method for purging a dosing system
US20100266458A1 (en) * 2007-12-03 2010-10-21 Hitachi Construction Machinery Co., Ltd Construction Machine
US20110027740A1 (en) * 2008-03-11 2011-02-03 Inergy Automotive Systems Research (Société Anonym Method for Heating a SCR System
US20110047966A1 (en) * 2009-08-27 2011-03-03 Cummins Ip, Inc Apparatus, system, and method for diesel exhaust fluid heating control
US20110146247A1 (en) * 2009-12-23 2011-06-23 Caterpillar Inc. Method for introducing a reductant into an exhaust stream
US20110146241A1 (en) * 2008-06-27 2011-06-23 Emitec Gesellschaft Fur Emissionstechologie Mbh Method for operating a urea-water solution metering system and motor vehicle using the system
WO2011087430A1 (en) * 2010-01-14 2011-07-21 Scania Cv Ab Device and method for warming a reductant in an scr system for a motor vehicle
US20110225950A1 (en) * 2010-03-22 2011-09-22 Caterpillar Inc. Control strategy for heated fluid lines
US20130186349A1 (en) * 2012-01-24 2013-07-25 Caterpillar Inc. Reductant supply line heating system
US8925299B2 (en) 2009-09-16 2015-01-06 Robert Bosch Gmbh Arrangement and method for operating an exhaust gas post-treatment device
US9109799B1 (en) 2010-05-13 2015-08-18 William M Murray Method for initiating flow of fluid blocked by frozen fluid
US9279354B2 (en) 2013-04-02 2016-03-08 Denso Corporation Control unit for urea-water adding device
US9512763B2 (en) 2014-12-05 2016-12-06 Caterpillar Inc. Diesel exhaust fluid dosing system for diesel engine aftertreatment module
US20160356193A1 (en) * 2013-12-20 2016-12-08 Continental Automotive Gmbh Method For Checking A Temperature Sensor In An SCR Exhaust Gas Post-Treatment System
US9732742B2 (en) 2011-02-09 2017-08-15 EMITEC Geselllschaft fuer Emissionstechnologie mbH Conveying unit for a reducing agent
US10294845B2 (en) 2014-08-08 2019-05-21 Isuzu Motors Limited System and method for managing temperature of urea solution
US10450922B2 (en) 2014-11-13 2019-10-22 Isuzu Motors Limited Urea water injection system and method for preventing crystallization in urea water injection device
US10975751B2 (en) * 2016-11-30 2021-04-13 Plastic Omnium Advanced Innovation And Research Method for estimating a thawed volume present in liquid form in a tank
CN114483262A (zh) * 2021-12-29 2022-05-13 潍柴动力股份有限公司 尿素泵、尿素泵的控制方法及控制系统

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4895888B2 (ja) * 2007-03-29 2012-03-14 Ｕｄトラックス株式会社 還元剤添加システムの解凍判定装置及びエンジンの排気浄化装置
DE102007031413A1 (de) * 2007-07-05 2009-01-08 Eichenauer Heizelemente Gmbh & Co. Kg Reduktionsmittelversorgungssystem für einen Abgasreinigungskatalysator eines Verbrennungsmotors und Verfahren zum Beheizen seiner Flüssigkeitsleitungen
JP2009097479A (ja) * 2007-10-19 2009-05-07 Bosch Corp 還元剤供給装置の制御装置及び制御方法
DE102008018945A1 (de) * 2008-04-15 2009-10-22 J. Eberspächer GmbH & Co. KG System zum Zuführen eines Reduktionsmittels in einen Abgasstrom
KR100974599B1 (ko) * 2008-08-07 2010-08-06 현대자동차주식회사 차량의 요소 분사량 제어장치 및 방법
DE102009025226A1 (de) * 2009-06-09 2010-12-16 Elringklinger Ag System zur Eindüsung von Harnstofflösung in einem Abgasstrang einer Brennkraftmaschine
JP5437890B2 (ja) * 2010-04-07 2014-03-12 日野自動車株式会社 後処理バーナシステムの燃料凍結防止方法及び装置
JP5573352B2 (ja) * 2010-05-17 2014-08-20 いすゞ自動車株式会社 尿素水温度センサの妥当性診断システム
JP5533363B2 (ja) * 2010-07-05 2014-06-25 いすゞ自動車株式会社 Ｓｃｒシステム
US8438838B2 (en) * 2010-10-11 2013-05-14 Faurecia Emissions Control Technologies Fuel-fired burner and heat exchanger system for heating a NOx reducing agent supply tank
JP5310804B2 (ja) * 2011-08-01 2013-10-09 トヨタ自動車株式会社 内燃機関の排気浄化装置
EP2811129B8 (en) * 2012-02-03 2017-09-27 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification apparatus for an internal combustion engine
US9528414B2 (en) 2013-10-14 2016-12-27 Cummins Emission Solutions, Inc. Diesel exhaust fluid deposit mitigation
GB2528764B (en) 2014-06-13 2020-07-29 Cummins Emission Solutions Inc In-line decomposition reactor pipe with exhaust assist
DE102014221957A1 (de) * 2014-10-28 2016-04-28 Robert Bosch Gmbh Verfahren und Vorrichtung zur Ansteuerung von Heizungen eines Förder- und Dosiersystems
US9470132B2 (en) 2014-12-05 2016-10-18 Cummins Emission Solutions, Inc. Compact radial exterior exhaust assisted decomposition reactor pipe
CN110249116B (zh) * 2016-12-13 2021-10-29 博世株式会社 加热器控制装置以及加热器控制方法
JP7200735B2 (ja) * 2019-02-20 2023-01-10 株式会社デンソー 排気浄化制御装置
CN117267006A (zh) 2019-03-14 2023-12-22 康明斯有限公司 寒冷环境温度条件下使用气缸切断方法的柴油机排气流体剂量器保护
CN111485979B (zh) * 2020-04-13 2022-05-27 凯龙高科技股份有限公司 一种液体供给泵的加热控制方法
CN111706420B (zh) * 2020-06-24 2021-05-04 安徽康明斯动力有限公司 一种尿素箱解冻和加热状态的控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5977525A (en) * 1997-04-16 1999-11-02 Toyota Jidosha Kabushiki Kaisha Control device for a heater for an air fuel ratio sensor in an intake passage
US20020088220A1 (en) * 1999-07-19 2002-07-11 Manfred Weigl Device and method for exhaust-gas aftertreatment in an internal-combustion engine
US6442932B1 (en) * 1998-04-24 2002-09-03 Siemens Aktiengesellschaft Method and device for the catalytic reduction of nitrogen oxides contained in the off-gas from a combustion system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2199737C (en) * 1994-09-13 2000-04-11 Lothar Hofman Method and device for introducing a fluid into an exhaust-gas purificat ion system
US6063350A (en) * 1997-04-02 2000-05-16 Clean Diesel Technologies, Inc. Reducing nox emissions from an engine by temperature-controlled urea injection for selective catalytic reduction
DE19750138A1 (de) * 1997-11-12 1999-05-27 Siemens Ag Einrichtung zum Einbringen eines flüssigen Reduktionsmittels in eine Abgas-Reinigungsanlage
JP2001303934A (ja) * 1998-06-23 2001-10-31 Toyota Motor Corp 内燃機関の排気浄化装置
JP3571660B2 (ja) * 2001-02-15 2004-09-29 トヨタ自動車株式会社 内燃機関の還元剤供給装置
JP3600522B2 (ja) * 2000-11-20 2004-12-15 トヨタ自動車株式会社 内燃機関の還元剤供給装置
EP1236499B1 (en) * 2001-03-02 2004-05-19 Haldor Topsoe A/S SCR process and apparatus for the reduction of NOx emissions
US6810661B2 (en) * 2002-08-09 2004-11-02 Ford Global Technologies, Llc Method and system for freeze protecting liquid NOx reductants for vehicle application

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5977525A (en) * 1997-04-16 1999-11-02 Toyota Jidosha Kabushiki Kaisha Control device for a heater for an air fuel ratio sensor in an intake passage
US6442932B1 (en) * 1998-04-24 2002-09-03 Siemens Aktiengesellschaft Method and device for the catalytic reduction of nitrogen oxides contained in the off-gas from a combustion system
US20020088220A1 (en) * 1999-07-19 2002-07-11 Manfred Weigl Device and method for exhaust-gas aftertreatment in an internal-combustion engine

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100266458A1 (en) * 2007-12-03 2010-10-21 Hitachi Construction Machinery Co., Ltd Construction Machine
US20110027740A1 (en) * 2008-03-11 2011-02-03 Inergy Automotive Systems Research (Société Anonym Method for Heating a SCR System
US20110146241A1 (en) * 2008-06-27 2011-06-23 Emitec Gesellschaft Fur Emissionstechologie Mbh Method for operating a urea-water solution metering system and motor vehicle using the system
US20100095653A1 (en) * 2008-10-22 2010-04-22 Caterpillar Inc. System and method for heating a reducing agent associated with a reducing agent distribution system
US8234854B2 (en) * 2008-10-22 2012-08-07 Caterpillar Inc. System and method for heating a reducing agent associated with a reducing agent distribution system
US8459012B2 (en) 2008-11-19 2013-06-11 Caterpillar Inc. Method for purging a dosing system
US20100122521A1 (en) * 2008-11-19 2010-05-20 Caterpillar Inc. Method for purging a dosing system
US20110047966A1 (en) * 2009-08-27 2011-03-03 Cummins Ip, Inc Apparatus, system, and method for diesel exhaust fluid heating control
US8387371B2 (en) * 2009-08-27 2013-03-05 Cummins Ip, Inc. Apparatus, system, and method for diesel exhaust fluid heating control
US8925299B2 (en) 2009-09-16 2015-01-06 Robert Bosch Gmbh Arrangement and method for operating an exhaust gas post-treatment device
US8359833B2 (en) 2009-12-23 2013-01-29 Caterpillar Inc. Method for introducing a reductant into an exhaust stream
US20110146247A1 (en) * 2009-12-23 2011-06-23 Caterpillar Inc. Method for introducing a reductant into an exhaust stream
WO2011087430A1 (en) * 2010-01-14 2011-07-21 Scania Cv Ab Device and method for warming a reductant in an scr system for a motor vehicle
US20110225950A1 (en) * 2010-03-22 2011-09-22 Caterpillar Inc. Control strategy for heated fluid lines
US8495868B2 (en) * 2010-03-22 2013-07-30 Caterpillar Inc. Control strategy for heated fluid lines
US9109799B1 (en) 2010-05-13 2015-08-18 William M Murray Method for initiating flow of fluid blocked by frozen fluid
US9732742B2 (en) 2011-02-09 2017-08-15 EMITEC Geselllschaft fuer Emissionstechnologie mbH Conveying unit for a reducing agent
US20130186349A1 (en) * 2012-01-24 2013-07-25 Caterpillar Inc. Reductant supply line heating system
US9279354B2 (en) 2013-04-02 2016-03-08 Denso Corporation Control unit for urea-water adding device
US20160356193A1 (en) * 2013-12-20 2016-12-08 Continental Automotive Gmbh Method For Checking A Temperature Sensor In An SCR Exhaust Gas Post-Treatment System
US10301997B2 (en) * 2013-12-20 2019-05-28 Continental Automotive Gmbh Method for checking a temperature sensor in an SCR exhaust gas post-treatment system
US10294845B2 (en) 2014-08-08 2019-05-21 Isuzu Motors Limited System and method for managing temperature of urea solution
US10450922B2 (en) 2014-11-13 2019-10-22 Isuzu Motors Limited Urea water injection system and method for preventing crystallization in urea water injection device
US9512763B2 (en) 2014-12-05 2016-12-06 Caterpillar Inc. Diesel exhaust fluid dosing system for diesel engine aftertreatment module
US10975751B2 (en) * 2016-11-30 2021-04-13 Plastic Omnium Advanced Innovation And Research Method for estimating a thawed volume present in liquid form in a tank
CN114483262A (zh) * 2021-12-29 2022-05-13 潍柴动力股份有限公司 尿素泵、尿素泵的控制方法及控制系统

Also Published As

Publication number Publication date
KR100805096B1 (ko) 2008-02-20
WO2005106220A1 (ja) 2005-11-10
JP2005315206A (ja) 2005-11-10
CN100451304C (zh) 2009-01-14
EP1741887A4 (en) 2010-06-23
CN1965153A (zh) 2007-05-16
JP4137838B2 (ja) 2008-08-20
EP1741887B1 (en) 2011-11-09
KR20070057082A (ko) 2007-06-04
EP1741887A1 (en) 2007-01-10

Similar Documents

Publication Publication Date Title
US20070251226A1 (en) Liquid Supply Device for Exhaust Gas Post-Treatment Device
JP5573351B2 (ja) Ｓｃｒシステム
WO2009098805A1 (ja) 温度センサの合理性診断装置及び合理性診断方法、並びに内燃機関の排気浄化装置
JP2009097479A (ja) 還元剤供給装置の制御装置及び制御方法
US9695726B2 (en) Metering arrangement and method for operating a metering arrangement
JP6274698B2 (ja) 還元剤噴射装置の制御装置及び制御方法並びに還元剤噴射装置
CN109863284B (zh) 尿素水供给系统及其控制方法
JP2008248710A (ja) 還元剤添加システムの解凍判定装置及びエンジンの排気浄化装置
JP5181030B2 (ja) 還元剤添加装置及びその制御方法
US20160123204A1 (en) Control apparatus and control method for reducing agent supply apparatus
JP4087350B2 (ja) エンジンの排気浄化装置
US8359914B2 (en) Procedure for checking the functionality of a pump
JP5533363B2 (ja) Ｓｃｒシステム
US10830120B2 (en) Heating system
RU2556946C2 (ru) Способ и устройство, относящиеся к охлаждению дозаторов системы scr
JP6753949B2 (ja) ヒータ制御装置及びヒータ制御方法
JP2006105014A (ja) 還元剤利用式排ガス浄化装置
JP2010144708A (ja) 車両用の排気浄化装置
JP2019027392A (ja) 還元剤解凍装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: BOSCH CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KANEKO, JUNICHI;REEL/FRAME:018583/0853

Effective date: 20061110

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION