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US20060236679A1 - Exhaust gas aftertreatment device for diesel engines of vehicles, preferably passenger cars - Google Patents

Exhaust gas aftertreatment device for diesel engines of vehicles, preferably passenger cars Download PDF

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Publication number
US20060236679A1
US20060236679A1 US10/570,166 US57016606A US2006236679A1 US 20060236679 A1 US20060236679 A1 US 20060236679A1 US 57016606 A US57016606 A US 57016606A US 2006236679 A1 US2006236679 A1 US 2006236679A1
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US
United States
Prior art keywords
control
exhaust gas
housing
injection valve
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
US10/570,166
Inventor
Roland Meyer
Dieter Maisch
Stefan Klotz
Wolgang Stephan
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.)
Hilite Germany GmbH
Original Assignee
Hydraulik Ring GmbH
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 Hydraulik Ring GmbH filed Critical Hydraulik Ring GmbH
Assigned to HYDRAULIK-RING GMBH reassignment HYDRAULIK-RING GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STEPHAN, WOLFGANG, MEYER, ROLAND, KLOTZ, STEFAN, MAISCH, DIETER
Publication of US20060236679A1 publication Critical patent/US20060236679A1/en
Assigned to BEAR STEARNS CORPORATE LENDING INC., AS FOREIGN AGENT reassignment BEAR STEARNS CORPORATE LENDING INC., AS FOREIGN AGENT INTELLECTUAL PROPERTY SECURITY AGREEMENT Assignors: HYDRAULIK-RING GMBH
Assigned to JPMORGAN CHASE BANK, N.A. reassignment JPMORGAN CHASE BANK, N.A. ASSIGNMENT OF SECURITY INTEREST Assignors: BEAR STEARNS CORPORATE LENDING, INC.
Assigned to ACUTEX, INC., HILITE INDUSTRIES AUTOMOTIVE, LP, HILITE INTERNATIONAL INC., HYDRAULIK-RING GMBH reassignment ACUTEX, INC. RELEASE OF SECURITY INTEREST IN PATENT COLLATERAL Assignors: JPMORGAN CHASE BANK N.A.
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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/36—Arrangements for supply of additional fuel
    • 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
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust 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
    • 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]
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater
    • 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
    • F01N2610/14—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
    • F01N2610/1433—Pumps
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the invention relates to an exhaust gas after treatment device for diesel engines of vehicles, preferably passenger cars, according to the preamble of claim 1 .
  • Such exhaust gas after treatment devices are employed mainly in trucks in order to treat the exhaust gas produced by the diesel engines in such a way that the nitrous oxides (NO, NO 2 ) are at least partially captured.
  • a pump is provided that pumps a 32.5% urea/water solution as an exhaust gas after treatment medium form a reservoir and supplies it at a certain pressure to an injection valve.
  • the valve meters the required amount of urea/water solution into a pressure-controlled airflow.
  • the pressure is taken from the onboard supply system.
  • the compressed air In the case of a passenger car, the compressed air must be provided by a separate air compressor. The airflow entrains the injected urea/water solution.
  • the emulsion that is produced in this way is supplied through an aerosol conduit to the injection nozzle at the exhaust pipe and is injected upstream of the catalyst into the exhaust pipe.
  • the control, the different sensors, the injection nozzle at the exhaust pipe, or the pumps are partially arranged so as to be spatially far apart. Therefore, these individual components must be connected by a cable harness and the cables must be laid to all these components. Often, the cables must be placed in the vicinity of the exhaust where high temperatures are present.
  • the invention has the object to configure the exhaust gas after treatment device of the aforementioned kind such that, while it has a simple configuration, it can be mounted in a simple way in the vehicle.
  • the pump and the control are combined to an assembly.
  • the complex laying of cables between these components is therefore not required so that the device can be mounted in a simple way.
  • the drawing shows the exhaust gas after treatment device according to the invention in a schematic illustration.
  • nitrous oxides are reduced by a catalyst.
  • a solution is employed which is introduced into the exhaust gas flow of the diesel engine.
  • a solution advantageously 32.5% urea/water solution is used that is stored in a reservoir 1 .
  • the reservoir is located in a tank 2 for diesel fuel.
  • a discharge line 3 extends into the reservoir 1 ; within the reservoir, the discharge line is advantageously connected to a filter 4 .
  • the discharge line 3 penetrates seal-tightly the reservoir 1 and is connected at the wall of the tank 2 to a conduit 5 .
  • the conduit branches to a pump block 6 that has two parallel-connected pump units 7 , 8 . Each one of the two pump units 7 , 8 has a check valve 9 , 10 that prevents return of medium into the reservoir 1 .
  • the two pump units 7 , 8 are connected to an electric/electronic control 11 .
  • the medium is supplied through an outlet line 12 , 13 , respectively, to a conveying line 14 in which the medium flows to the control valve 15 .
  • Check valves 16 , 17 are provided in the outlet lines 12 , 13 , respectively; they close toward the pump devices 7 , 8 .
  • the control valve 15 is also connected to the control 11 .
  • the pressure of the medium in the conveying line 14 is monitored by a pressure sensor 18 that is connected to the control 11 .
  • the control valve 15 is in a closed position so that the medium cannot flow in the direction toward a throttle location 20 provided at the exhaust pipe 19 .
  • the throttle location 20 is a component of an injection valve 25 with which the exhaust gas treatment medium is injected into the exhaust pipe 19 .
  • the exhaust gas flowing through the exhaust pipe 19 takes up the injected exhaust gas treatment medium.
  • the control valve 15 controlled by the control 11 , switches into its through position, the exhaust gas after treatment medium flows from the conveying line 14 through the control valve 15 into a conveying line 21 that is advantageously configured as an expansion hose.
  • the conveying line 21 is connected to the throttle valve 20 .
  • the temperature of the exhaust gas in the exhaust pipe 19 is measured by temperature sensor 22 that is connected by a bus 23 , preferably a CAN bus, to the control 11 .
  • the conveying line 21 is preferably heatable.
  • a heating device 24 is provided that is arranged on the conveying line 21 or is integrated therein. This heating device 24 is also connected to the control 11 .
  • the injection valve 25 can be provided optionally with a check valve 26 that closes toward the conveying line 21 . By providing the check valve 26 , the operational safety of the injection valve 25 is improved.
  • the onboard electric system 27 of the vehicle is connected to the control 11 .
  • the control 11 is mounted on a housing 28 in which the pump 6 , its pressure sensor 18 , and the control valve 15 are arranged.
  • the housing 28 itself is a component of an assembly 31 which, in turn, is a part of the metering device 29 indicated in the drawing by a dashed line.
  • the metering device 29 contains the injection valve 25 .
  • the important components of the metering device 29 are mounted in the housing 28 , long cable lengths connecting the individual components of the after treatment device are not needed. A significant contribution to this is that the control 11 itself is provided on the housing 28 and, optionally, can be integrated into the housing 28 . Accordingly, the important components of the after treatment device are arranged spatially very close together.
  • the control 11 must only be provided with connecting possibilities for the onboard electric system 27 , for the bus line 23 , and for the heating device 24 of the conveying line 24 .
  • the electrically heatable expansion hose 21 extends from the housing 28 of the metering unit or assembly 31 to the injection nozzle 25 at the injection location on the exhaust pipe 19 .
  • the injection valve 25 the exhaust gas treatment medium is metered into the exhaust gas flowing in the exhaust pipe 19 .
  • the additional volume that is generated because of the freezing process can be forced through the injection valve 25 into the exhaust pipe 19 if it is not taken up by the heatable expansion hose 21 .
  • a pump solenoid of the pump 6 can be permanently supplied with electric current without the pump being in conveying mode. The heating that is caused by this action is then used for thawing the assembly 31 . In this way, a separate connection to the vehicle cooling system, which would be otherwise necessary for thawing, is not needed.
  • the expansion hose 21 is heated in the described way so that the exhaust gas treatment medium flowing through the expansion hose is heated.
  • the injection valve 25 is heated to such an extent that possibly frozen exhaust gas treatment medium will thaw.
  • the injection nozzle that is provided at the exit of the injection valve 25 can thus be heated in a reliable way so that it will not freeze shut.
  • the pump 6 can be used as a heating element in the afore described way by permanent current supply to its solenoid so that the medium frozen within the pump is thawed.
  • the assembly 31 and the housing 28 are mounted directly on the tank 2 so that an additional external intake line for the exhaust gas treatment medium is not required.
  • the exhaust gas after treatment device is advantageously provided in passenger cars, in which—in contrast to trucks—a compressed air system is not present, the exhaust gas treatment medium can be easily metered in the described way into the exhaust gas flow within the exhaust pipe 19 without employing compressed air.
  • the described exhaust gas after treatment device is freeze-proof, has a compact configuration, and can be produced inexpensively.
  • the device can also be used for trucks.

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  • 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)
  • Fuel-Injection Apparatus (AREA)

Abstract

An exhaust gas after treatment device for a diesel engine of a vehicle has at least one injection valve with an injection nozzle through which an exhaust gas treatment medium is injected into an exhaust pipe. At least one pump is provided that conveys the exhaust gas treatment medium to the at least one injection valve. At least one sensor and at least one control are also provided. The pump, the sensor, and the injection valve are connected to the at least one control. The at least one pump and the at least one control are combined to an assembly, and the assembly also includes the at least one injection valve.

Description

  • The invention relates to an exhaust gas after treatment device for diesel engines of vehicles, preferably passenger cars, according to the preamble of claim 1.
  • Such exhaust gas after treatment devices are employed mainly in trucks in order to treat the exhaust gas produced by the diesel engines in such a way that the nitrous oxides (NO, NO2) are at least partially captured. For this purpose, a pump is provided that pumps a 32.5% urea/water solution as an exhaust gas after treatment medium form a reservoir and supplies it at a certain pressure to an injection valve. The valve meters the required amount of urea/water solution into a pressure-controlled airflow. In the case of trucks, the pressure is taken from the onboard supply system. In the case of a passenger car, the compressed air must be provided by a separate air compressor. The airflow entrains the injected urea/water solution. The emulsion that is produced in this way is supplied through an aerosol conduit to the injection nozzle at the exhaust pipe and is injected upstream of the catalyst into the exhaust pipe. The control, the different sensors, the injection nozzle at the exhaust pipe, or the pumps are partially arranged so as to be spatially far apart. Therefore, these individual components must be connected by a cable harness and the cables must be laid to all these components. Often, the cables must be placed in the vicinity of the exhaust where high temperatures are present.
  • The invention has the object to configure the exhaust gas after treatment device of the aforementioned kind such that, while it has a simple configuration, it can be mounted in a simple way in the vehicle.
  • This object is solved for the exhaust gas after treatment device of the aforementioned kind in accordance with the present invention with the characterizing features of claim 1.
  • In the exhaust gas after treatment device according to the invention at least the pump and the control are combined to an assembly. The complex laying of cables between these components is therefore not required so that the device can be mounted in a simple way.
  • Further features of the invention result from the dependent claims, the description, and the drawing.
  • The invention will be explained in more detail with the aid of an embodiment illustrated in the drawing. The drawing shows the exhaust gas after treatment device according to the invention in a schematic illustration.
  • For exhaust gas after treatment of diesel engines in trucks and passenger cars, the nitrous oxides (NO, NO2) are reduced by a catalyst. For this purpose, a solution is employed which is introduced into the exhaust gas flow of the diesel engine. As a solution, advantageously 32.5% urea/water solution is used that is stored in a reservoir 1. The reservoir is located in a tank 2 for diesel fuel. A discharge line 3 extends into the reservoir 1; within the reservoir, the discharge line is advantageously connected to a filter 4. The discharge line 3 penetrates seal-tightly the reservoir 1 and is connected at the wall of the tank 2 to a conduit 5. The conduit branches to a pump block 6 that has two parallel-connected pump units 7, 8. Each one of the two pump units 7, 8 has a check valve 9, 10 that prevents return of medium into the reservoir 1. The two pump units 7, 8 are connected to an electric/electronic control 11.
  • By means of the pump units 7, 8, the medium is supplied through an outlet line 12, 13, respectively, to a conveying line 14 in which the medium flows to the control valve 15. Check valves 16, 17 are provided in the outlet lines 12, 13, respectively; they close toward the pump devices 7, 8. The control valve 15 is also connected to the control 11.
  • The pressure of the medium in the conveying line 14 is monitored by a pressure sensor 18 that is connected to the control 11.
  • In the drawing, the control valve 15 is in a closed position so that the medium cannot flow in the direction toward a throttle location 20 provided at the exhaust pipe 19. The throttle location 20 is a component of an injection valve 25 with which the exhaust gas treatment medium is injected into the exhaust pipe 19. The exhaust gas flowing through the exhaust pipe 19 takes up the injected exhaust gas treatment medium. When the control valve 15, controlled by the control 11, switches into its through position, the exhaust gas after treatment medium flows from the conveying line 14 through the control valve 15 into a conveying line 21 that is advantageously configured as an expansion hose. The conveying line 21 is connected to the throttle valve 20.
  • The temperature of the exhaust gas in the exhaust pipe 19 is measured by temperature sensor 22 that is connected by a bus 23, preferably a CAN bus, to the control 11.
  • The conveying line 21 is preferably heatable. In this case, a heating device 24 is provided that is arranged on the conveying line 21 or is integrated therein. This heating device 24 is also connected to the control 11.
  • The injection valve 25 can be provided optionally with a check valve 26 that closes toward the conveying line 21. By providing the check valve 26, the operational safety of the injection valve 25 is improved.
  • The onboard electric system 27 of the vehicle is connected to the control 11. The control 11 is mounted on a housing 28 in which the pump 6, its pressure sensor 18, and the control valve 15 are arranged. The housing 28 itself is a component of an assembly 31 which, in turn, is a part of the metering device 29 indicated in the drawing by a dashed line. In addition to the assembly 31 and the control 11, the metering device 29 contains the injection valve 25.
  • Since the important components of the metering device 29 are mounted in the housing 28, long cable lengths connecting the individual components of the after treatment device are not needed. A significant contribution to this is that the control 11 itself is provided on the housing 28 and, optionally, can be integrated into the housing 28. Accordingly, the important components of the after treatment device are arranged spatially very close together.
  • In the housing 28 these parts are protected against destruction, for example, caused by freezing.
  • The control 11 must only be provided with connecting possibilities for the onboard electric system 27, for the bus line 23, and for the heating device 24 of the conveying line 24.
  • The electrically heatable expansion hose 21 extends from the housing 28 of the metering unit or assembly 31 to the injection nozzle 25 at the injection location on the exhaust pipe 19. Through the injection valve 25 the exhaust gas treatment medium is metered into the exhaust gas flowing in the exhaust pipe 19.
  • When at low external temperatures the exhaust gas treatment medium freezes, the additional volume that is generated because of the freezing process can be forced through the injection valve 25 into the exhaust pipe 19 if it is not taken up by the heatable expansion hose 21.
  • Within the housing 28 of the assembly 31 a pump solenoid of the pump 6 can be permanently supplied with electric current without the pump being in conveying mode. The heating that is caused by this action is then used for thawing the assembly 31. In this way, a separate connection to the vehicle cooling system, which would be otherwise necessary for thawing, is not needed.
  • Outside of the housing 28, the expansion hose 21 is heated in the described way so that the exhaust gas treatment medium flowing through the expansion hose is heated. This has the result that also the injection valve 25 is heated to such an extent that possibly frozen exhaust gas treatment medium will thaw. The injection nozzle that is provided at the exit of the injection valve 25 can thus be heated in a reliable way so that it will not freeze shut.
  • Since the components that are present in the metering device are spatially very close together, the corresponding lines that are required between the control 11 and these components are thus short. Accordingly, a cable harness is not needed. All electrically controlled components are electrically contacted in the housing 28 or the metering device 29 by means of lead frames or flexible contact films. An electric line to the exhaust pipe 19 for the pressure sensor 18 is not required because it is arranged within the housing 28 itself. In the case of frozen exhaust gas medium, the pump 6 can be used as a heating element in the afore described way by permanent current supply to its solenoid so that the medium frozen within the pump is thawed.
  • Advantageously, the assembly 31 and the housing 28 are mounted directly on the tank 2 so that an additional external intake line for the exhaust gas treatment medium is not required.
  • Since the exhaust gas after treatment device is advantageously provided in passenger cars, in which—in contrast to trucks—a compressed air system is not present, the exhaust gas treatment medium can be easily metered in the described way into the exhaust gas flow within the exhaust pipe 19 without employing compressed air.
  • Along the exhaust pipe 19 that becomes very hot in operation there is no cable or electric line.
  • The described exhaust gas after treatment device is freeze-proof, has a compact configuration, and can be produced inexpensively. The device can also be used for trucks.

Claims (20)

1.-20. (canceled)
21. An exhaust gas after treatment device for a diesel engine of a vehicle, the device comprising:
at least one injection valve with an injection nozzle through which an exhaust gas after treatment medium is injected into an exhaust pipe;
at least one pump conveying the exhaust gas treatment medium to the at least one injection valve;
at least one sensor;
at least one control;
wherein the at least one pump, the at least one sensor, and the at least one injection valve are connected to the at least one control;
wherein the at least one pump and the at least one control are combined to an assembly;
wherein the assembly comprises the at least one injection valve.
22. The device according to claim 21, wherein the at least one injection valve comprises a check valve that opens in a direction toward the injection nozzle.
23. The device according to claim 22, further comprising a throttle location arranged downstream of the check valve.
24. The device according to claim 21, wherein at least one of the at least one pump, the at least one sensor, and the at least one injection valve are connected electrically to the at least one control inside the assembly.
25. The device according to claim 21, wherein the at least one control has a connector for an onboard electric system of a vehicle.
26. The device according to claim 21, further comprising a control valve arranged upstream of the at least one injection valve.
27. The device according to claim 26, wherein the control valve is arranged in a housing.
28. The device according to claim 27, wherein the housing is a part of the assembly and the at least one pump is arranged in the housing.
29. The device according to claim 27, wherein the at least one sensor is arranged in the housing.
30. The device according to claim 29, wherein the at least one sensor is a pressure sensor.
31. The device according to claim 27, wherein the at least one control is connected to the housing.
32. The device according to claim 27, further comprising at least one additional sensor arranged outside of the housing, wherein the at least one control has a connector for the at least one additional sensor.
33. The device according to claim 32, wherein the at least one additional sensor is a temperature sensor.
34. The device according to claim 32, wherein the at least one additional sensor is arranged external to the assembly.
35. The device according to claim 27, wherein the at least one injection valve is connected by an expansion hose to the housing.
36. The device according to claim 35, wherein the expansion hose is heatable.
37. The device according to claim 27, wherein the housing is mounted on a diesel fuel tank of the vehicle.
38. The device according to claim 21, wherein the assembly is part of a metering device.
39. The device according to claim 37, wherein the metering device and the assembly form a mounting module.
US10/570,166 2003-09-02 2004-08-19 Exhaust gas aftertreatment device for diesel engines of vehicles, preferably passenger cars Abandoned US20060236679A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10341996A DE10341996A1 (en) 2003-09-02 2003-09-02 Exhaust after-treatment device for diesel engines of vehicles, preferably of passenger cars
DE10341996.9 2003-09-02
PCT/DE2004/001847 WO2005024196A1 (en) 2003-09-02 2004-08-19 Exhaust gas aftertreatment device for diesel engines of vehicles, preferably passenger cars

Publications (1)

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US20060236679A1 true US20060236679A1 (en) 2006-10-26

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US10/570,166 Abandoned US20060236679A1 (en) 2003-09-02 2004-08-19 Exhaust gas aftertreatment device for diesel engines of vehicles, preferably passenger cars

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US (1) US20060236679A1 (en)
EP (1) EP1664498A1 (en)
JP (1) JP2007504387A (en)
CN (1) CN1846043A (en)
DE (2) DE10341996A1 (en)
WO (1) WO2005024196A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
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US20080290184A1 (en) * 2007-05-26 2008-11-27 Jurgen Stritzinger Heating Insert
US20090028533A1 (en) * 2005-07-12 2009-01-29 Eichenauer Heizelemente Gmbh & Co. Kg Tank Heating System
US20090078692A1 (en) * 2005-08-06 2009-03-26 Eichenauer Heizelente Gnbh & Co. Kg Heating System
US20090084095A1 (en) * 2007-09-28 2009-04-02 Caterpillar Inc. Exhaust after-treatment system having a secondary tank
US20100064670A1 (en) * 2005-06-22 2010-03-18 Eichenauer Heizelemente Gmbh & Co. Kg Reductant Supply System for a Waste Gas Cleaning Catalyst and a Heating Unit Therefor
WO2010066564A1 (en) * 2008-12-10 2010-06-17 Continental Automotive Gmbh Method and device for adapting the injection agent supply in an injection system, and exhaust gas aftertreatment system
US7836684B2 (en) 2005-06-04 2010-11-23 Eichenauer Heizelemente Gmbh & Co. Kg Urea supply system for a waste gas cleaning catalyst and heating insert suitable therefor
US9556768B2 (en) 2010-06-22 2017-01-31 Robert Bosch Gmbh Device and method for metering a liquid into the exhaust tract of an internal combustion engine
CN107461244A (en) * 2016-06-06 2017-12-12 天纳克（苏州）排放系统有限公司 Integrating device, exhaust gas aftertreatment system and control method
US9879582B2 (en) 2013-03-04 2018-01-30 Continental Automotive Gmbh Method for starting the operation of a device for providing a liquid additive

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004025062B4 (en) 2004-05-18 2006-09-14 Hydraulik-Ring Gmbh Freezer-compatible metering valve
DE102005025724A1 (en) * 2005-06-04 2006-12-07 Eichenauer Heizelemente Gmbh & Co. Kg Carbamide supply system for catalytic converter has connecting line linked to thawed-out carbamide container
DE102006046901A1 (en) * 2006-10-04 2008-04-10 Robert Bosch Gmbh Tank for storing a reducing agent
DE102007004687B4 (en) 2007-01-25 2012-03-01 Hydraulik-Ring Gmbh Volume quantity dispensing unit and method for calibrating the pressure output signal volume quantity characteristic
DE102007017458B4 (en) * 2007-04-03 2025-02-06 Robert Bosch Gmbh Method for heating a reducing agent metering valve in an SCR system for exhaust gas aftertreatment of an internal combustion engine
DE102008012780B4 (en) 2008-03-05 2012-10-04 Hydraulik-Ring Gmbh exhaust treatment device
DE102009035940C5 (en) 2009-08-03 2017-04-20 Cummins Ltd. SCR exhaust treatment device
DE102010061222B4 (en) 2010-12-14 2015-05-07 Cummins Ltd. SCR exhaust treatment device
DE102011053053B4 (en) * 2011-08-26 2023-06-15 Cummins Ltd. fluid line
DE102012204107A1 (en) 2012-03-15 2013-09-19 Robert Bosch Gmbh metering
US8607625B2 (en) * 2012-05-10 2013-12-17 GM Global Technology Operations LLC Service test for exhaust gas treatment system
DE102013101720B4 (en) 2013-02-21 2015-02-12 Bernd Giegerich Protective element to prevent frost damage
CN105863786A (en) * 2016-04-11 2016-08-17 安徽康成工业产品设计有限公司 Tubular purification device for automobile exhaust
CN114439578B (en) * 2020-10-30 2024-09-13 长城汽车股份有限公司 Urea nozzle, urea injection system and vehicle

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6082102A (en) * 1997-09-30 2000-07-04 Siemens Aktiengesellschaft NOx reduction system with a device for metering reducing agents
US6192676B1 (en) * 1998-02-25 2001-02-27 Siemens Aktiengesellschaft Device for reducing the NOx content in the exhaust gas of 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
US20030033799A1 (en) * 2001-08-09 2003-02-20 Gerd Scheying Exhaust gas treatment unit and measuring instrument for ascertaining a concentration of a urea-water solution
US6526746B1 (en) * 2000-08-02 2003-03-04 Ford Global Technologies, Inc. On-board reductant delivery assembly
US6539708B1 (en) * 1998-02-16 2003-04-01 Siemens Aktiengesellscahft Metering system
US6814303B2 (en) * 2002-04-03 2004-11-09 Cleaire Advanced Emission Controls Fluid-cooled mount for an injector
US20050069468A1 (en) * 2000-09-22 2005-03-31 Sven Huber Device for the dosing of a reducing agent
US6912846B2 (en) * 2000-09-22 2005-07-05 Robert Bosch Gmbh Method and apparatus for metering a reducing agent for removing nitrogen oxides from exhaust gases
US7000381B2 (en) * 2002-07-11 2006-02-21 Hydraulik-Ring Gmbh Device for exhaust gas after treatment of motor vehicles, in particular, diesel engine vehicles
US20060101810A1 (en) * 2004-11-15 2006-05-18 Angelo Theodore G System for dispensing fuel into an exhaust system of a diesel engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29717494U1 (en) * 1997-09-30 1997-12-11 Siemens AG, 80333 München Device for NOx reduction in the exhaust gas of an internal combustion engine
DE10139139A1 (en) * 2001-08-09 2003-06-12 Bosch Gmbh Robert Dosing system for dosing a reducing agent for exhaust gas aftertreatment
DE10162269A1 (en) * 2001-12-18 2003-07-10 Siemens Ag Device for determining the level of a liquid in a container
ATE411468T1 (en) * 2002-12-23 2008-10-15 Grundfos Nonox As DOSING PUMP UNIT

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6082102A (en) * 1997-09-30 2000-07-04 Siemens Aktiengesellschaft NOx reduction system with a device for metering reducing agents
US6539708B1 (en) * 1998-02-16 2003-04-01 Siemens Aktiengesellscahft Metering system
US6192676B1 (en) * 1998-02-25 2001-02-27 Siemens Aktiengesellschaft Device for reducing the NOx content in the exhaust gas of 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
US6526746B1 (en) * 2000-08-02 2003-03-04 Ford Global Technologies, Inc. On-board reductant delivery assembly
US20050069468A1 (en) * 2000-09-22 2005-03-31 Sven Huber Device for the dosing of a reducing agent
US6912846B2 (en) * 2000-09-22 2005-07-05 Robert Bosch Gmbh Method and apparatus for metering a reducing agent for removing nitrogen oxides from exhaust gases
US20030033799A1 (en) * 2001-08-09 2003-02-20 Gerd Scheying Exhaust gas treatment unit and measuring instrument for ascertaining a concentration of a urea-water solution
US6814303B2 (en) * 2002-04-03 2004-11-09 Cleaire Advanced Emission Controls Fluid-cooled mount for an injector
US7000381B2 (en) * 2002-07-11 2006-02-21 Hydraulik-Ring Gmbh Device for exhaust gas after treatment of motor vehicles, in particular, diesel engine vehicles
US20060101810A1 (en) * 2004-11-15 2006-05-18 Angelo Theodore G System for dispensing fuel into an exhaust system of a diesel engine

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7836684B2 (en) 2005-06-04 2010-11-23 Eichenauer Heizelemente Gmbh & Co. Kg Urea supply system for a waste gas cleaning catalyst and heating insert suitable therefor
US20100064670A1 (en) * 2005-06-22 2010-03-18 Eichenauer Heizelemente Gmbh & Co. Kg Reductant Supply System for a Waste Gas Cleaning Catalyst and a Heating Unit Therefor
US20090028533A1 (en) * 2005-07-12 2009-01-29 Eichenauer Heizelemente Gmbh & Co. Kg Tank Heating System
US7978965B2 (en) 2005-07-12 2011-07-12 Roland Starck Tank heating system
US8680437B2 (en) 2005-08-06 2014-03-25 Eichenauer Heizelemente Gmbh & Co. Kg Heating system
US20090078692A1 (en) * 2005-08-06 2009-03-26 Eichenauer Heizelente Gnbh & Co. Kg Heating System
US20080290184A1 (en) * 2007-05-26 2008-11-27 Jurgen Stritzinger Heating Insert
US20090084095A1 (en) * 2007-09-28 2009-04-02 Caterpillar Inc. Exhaust after-treatment system having a secondary tank
US8096112B2 (en) 2007-09-28 2012-01-17 Caterpillar Inc. Exhaust after-treatment system having a secondary tank
WO2010066564A1 (en) * 2008-12-10 2010-06-17 Continental Automotive Gmbh Method and device for adapting the injection agent supply in an injection system, and exhaust gas aftertreatment system
US9181834B2 (en) 2008-12-10 2015-11-10 Continental Automotive Gmbh Method and device for adapting the injection agent supply in an injection system, and exhaust gas aftertreatment system
US9556768B2 (en) 2010-06-22 2017-01-31 Robert Bosch Gmbh Device and method for metering a liquid into the exhaust tract of an internal combustion engine
US9879582B2 (en) 2013-03-04 2018-01-30 Continental Automotive Gmbh Method for starting the operation of a device for providing a liquid additive
CN107461244A (en) * 2016-06-06 2017-12-12 天纳克（苏州）排放系统有限公司 Integrating device, exhaust gas aftertreatment system and control method

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WO2005024196A1 (en) 2005-03-17
CN1846043A (en) 2006-10-11

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