WO2008080477A1 - Système de dosage et procédé de mise en œuvre d'un système de dosage - Google Patents

Système de dosage et procédé de mise en œuvre d'un système de dosage Download PDF

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Publication number
WO2008080477A1
WO2008080477A1 PCT/EP2007/010457 EP2007010457W WO2008080477A1 WO 2008080477 A1 WO2008080477 A1 WO 2008080477A1 EP 2007010457 W EP2007010457 W EP 2007010457W WO 2008080477 A1 WO2008080477 A1 WO 2008080477A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
metering
mode
dosing
line
Prior art date
Application number
PCT/EP2007/010457
Other languages
German (de)
English (en)
Inventor
Frank Noack
Original Assignee
Purem Abgassysteme Gmbh & Co. Kg
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 Purem Abgassysteme Gmbh & Co. Kg filed Critical Purem Abgassysteme Gmbh & Co. Kg
Priority to EP07846946A priority Critical patent/EP2150687A1/fr
Publication of WO2008080477A1 publication Critical patent/WO2008080477A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; 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
    • 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
    • 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
    • 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
    • F01N2610/14—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
    • F01N2610/1466—Means for venting air out of conduits or tanks
    • 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
    • F01N2610/1473—Overflow or return means for the substances, e.g. conduits or valves for the return path
    • 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
    • F01N2610/1493—Purging the reducing agent out of the conduits or nozzle
    • 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 a metering system for metering a liquid in an exhaust pipe, which is connected to an internal combustion engine of a motor vehicle and a method for operating a metering system according to the preambles of the independent claims.
  • a reducing agent for the reduction of nitrogen oxides in the exhaust gas of motor vehicles as a reducing agent, a liquid containing ammonia via a metering system in the exhaust stream, which converts the nitrogen oxides into harmless components.
  • the reducing agent is present, for example, as an aqueous urea solution and releases ammonia only for the catalytic conversion of the nitrogen oxides on contact with the hot exhaust gas flow.
  • the aqueous urea solution can be easily stored in the vehicle.
  • the aqueous urea solution freezes and the metering system is damaged by the freezing volume of the reducing agent with its significant volume increase compared to the liquid state.
  • DE 101 50 518 C1 discloses reducing agents via a reducing agent line into a mixing chamber of the metering system, forming a mixture of reducing agent and air, which is supplied to the exhaust gas via a mixture line and a metering valve. After switching off the internal combustion engine, air is further introduced into the mixing chamber and a bypass line bypassing the reducing agent pump is opened, so that the mixing chambers, the mixture line, the metering valve and the reducing agent line are filled with air.
  • a device in which the lines of the metering system are filled after stopping the engine with pressurized ambient air.
  • a for this purpose, a brushesspulventil is provided, with which the reducing agent can be rewound into a storage tank or can be spooled out of the metering valve.
  • DE 102 54 981 A1 also discloses replacing the reducing agent with air after switching off the internal combustion engine from the lines of the metering system.
  • the air is optionally introduced either towards the mixing chamber or in the direction of a storage tank.
  • the object of the invention is to provide a metering system and a method for operating a metering system with which its antifreeze protection is improved and which can also be used in so-called airless metering systems.
  • the inventive dosing system for dosing a liquid has a storage tank, a Flusstechnikspumpe with Verdrangersystem, a metering valve and a supply line, via which the liquid from the storage tank to the metering valve can be required on. Furthermore, a switchable ventilation valve connected to the supply line is provided, with which it is possible to switch from a metering mode of the metering system into a ventilation mode. In metering mode, the venting valve establishes a flow connection between the fluid pump and the metering valve. In the aeration mode, the breather valve allows for aeration of the supply line, causing a displacement of ambient liquid in the supply line due to actuation of the liquid pump.
  • the metering mode is thus the normal operating mode in which a metering of the liquid is provided or the metering system is in metering readiness.
  • the aeration mode is an operating mode in which it is preferable to switch over after the dosing mode has ended so as to at least partially aerate the dosing system.
  • the aeration mode is set before stopping the dosing system.
  • aeration means an at least partial, but preferably at least approximately complete, replacement of the ammonia-containing liquid by a gaseous displacement medium, preferably ambient air.
  • a gaseous displacement medium preferably ambient air.
  • aeration means an at least partial, but preferably at least approximately complete, replacement of the ammonia-containing liquid by a gaseous displacement medium, preferably ambient air.
  • the metering system according to the invention has the advantage that for the ventilation of the supply line no separate Forderü for the aeration medium is needed, since the ventilation is effected by the already existing Flusstechnikspumpe.
  • the ventilation medium is ambient air. This eliminates the provision of a compressed air reservoir to displace the liquid during venting.
  • the metering system according to the invention is therefore particularly suitable for so-called air-free metering systems, in which the liquid to be metered is injected into the exhaust gas while dispensing with atomization assisted by compressed air. However, it can also be used in so-called air-assisted dosing systems.
  • the metering system according to the invention is particularly suitable for metering aqueous urea solution as a selective nitrogen oxide reducing agent, but it can also be used for metering other liquids, in particular aqueous, ammonia containing liquids in free or bound form.
  • the Verdrangersystem the Flusstechnikspumpe remains filled in the aeration mode with the liquid substantially.
  • the metering system is preferably designed such that frost damage can not occur in the liquid pump. This is preferably ensured by a frost-proof execution of the liquid pump.
  • the Liquid pump is a trouble-free re-commissioning of the dosing system allows, as immediately the full suction of the liquid pump is available.
  • the displacer system of the fluid pump is preferably formed from a diaphragm chamber or from cylinders into which it is sucked in as a result of a pump actuation or from which it is pressed out.
  • a return line is provided, via which the liquid can flow back from the metering valve to the storage tank in the metering mode, wherein the return line can be ventilated in the aeration mode.
  • frost protection is ensured even for the return line.
  • a partial ventilation of the return line may be sufficient.
  • return line under their ventilation to understand that one or more sections are vented.
  • a suction line is provided, via which the liquid can be sucked out of the storage tank in the metering mode, wherein in the ventilation mode, the suction line remains substantially filled with the liquid.
  • the intake pipe is preferably designed frost-proof. This can be achieved by a flexible or stretchable execution or by volume compensation elements. On aeration of the intake can therefore be omitted in this embodiment.
  • a drain line is provided, via which a liquid volume displaced in the aeration mode can flow back to the storage tank.
  • the drain line is preferably one separate line, which is used exclusively in ventilation mode. It can therefore be cost-effective, for example in the form of a plastic line.
  • the supply line and / or the return line are designed to be at least partially hydraulically rigid.
  • the line sections are hydraulically rigid, which can be filled with a standing under an increased dosing liquid pressure. This execution enables a high dosing accuracy of the liquid preferably present in the dosing mode under an overpressure in the supply line and / or the return line.
  • the ventilation of the unyielding or hydraulically rigid line (s) prevents their damage by frost effect.
  • the inventive method for operating a metering system for metering a liquid is characterized in that the ventilation of a liquid keitsbowenden in metering line is effected by the operation of a Flusstechniks- pump, which required the liquid from a storage tank to a metering valve during metering mode of the metering becomes.
  • the ventilation takes place by displacement of the liquid, preferably by ambient air. This is achieved by empty suction of the line to be ventilated, wherein access of ambient air to the line to be ventilated is made possible by actuation of a ventilation valve.
  • a flow connection of the other end of the line is established with a suction inlet of the fluid pump. Aeration by impressions of Ambient air in the relevant line by operating the Flusstechnikspumpe is of course also possible.
  • a Verdrangersystem the Flusstechnikspumpe remains filled with the liquid in the aeration mode substantially. This procedure is particularly advantageous in the case of empty suction of the line to be ventilated, since a high suction effect can be achieved as a result of the fluid-filled liquid pump.
  • Fig. 1 is a schematic representation of an advantageous
  • Embodiment of the metering system according to the invention in the aeration mode Embodiment of the metering system according to the invention in the aeration mode.
  • the dosing system 1 shown in the dosing mode in FIG. 1 comprises a pump unit 2 for requesting a liquid stored in a storage tank 3 to a metering valve 4, from which it can be injected into a not shown exhaust pipe of an internal combustion engine of a motor vehicle waiving a Druckensteinunterstut- tion ,
  • the Liquid contains ammonia in free or bound form and is used for selective nitrogen oxide reduction on a catalyst arranged in the exhaust gas line.
  • it is an aqueous urea solution, hereinafter referred to simply as HWL.
  • HWL aqueous urea solution
  • the components arranged within the dashed line are combined to form a compact dosing module D.
  • a changeover valve 6 establishes a flow connection from the suction line 5 to a suction-side connection 7 of the pump unit 2.
  • a filter 9 arranged in a first connecting line 8 between change-over valve 6 and pump unit 2
  • a fluid pump 10 provides aspirated HWL at an increased pressure at a pressure port 11 of the pump unit 2.
  • the liquid pump 10 is preferably designed as a variable in its Forderrate adjustable electrical metering pump in reciprocating or diaphragm pump design.
  • HWL can be required by the pump unit 2 to the metering valve 4.
  • a ventilation valve 13 connected to the supply line 12 provides a flow connection between the pressure connection in the metering mode for this purpose
  • the metering valve 4 required, but not metered into the exhaust HWL can flow back into the storage tank 3 via a return line with a first section 14 and a second section 14 'and further via the switching valve 6 and a second connecting line 15 connected thereto.
  • the metering valve 4 is present preferably formed as a spring-loaded nozzle with an outwardly opening nozzle needle. To deliver HWL into the exhaust gas, a dosing pressure exceeding the corresponding spring force is necessary, which is applied by the fluid pump 10.
  • the dispensing pressure is preferably set so high that no bubble formation by boiling in the supply line 12 also occurs at a 100 0 C heated HWL. A metering pressure in the range of 4 bar to 10 bar is preferred.
  • a switchable, in particular clocked, operable proportional valve 16 is used in the return line, which can be controlled in connection with the liquid pump 10 so that the provided HWL metering can be discharged into the exhaust.
  • sensors are provided in particular for the pump unit 2, which provide information about the relevant pressure and Temperaturverhaltnisse.
  • a pressure sensor 17 for the pump output-side HWL pressure and temperature sensors 18, 19 for the pump-inlet-side HWL temperature or the temperature of the drive motor of the fluid pump 10 are shown. With these sensors can be detected and taken into account on the metering accuracy influencing pressure and temperature conditions of the pump unit 2. If required, additional sensors can be provided to detect additional variables influencing the metering accuracy.
  • supply line 12 and / or the return line at least partially hydraulically rigid execute.
  • a hydraulically rigid execution is less least provided for both the supply line 12 and the first portion 14 of the return line, as in these parts of the line in dosing an increased dosing occurs.
  • a pressure which detrimentally affects the metering accuracy is avoided in the case of pressure changes in these line parts.
  • damage may occur due to freezing, particularly with these line parts, if they are filled with HWL.
  • the ventilation valve 13 is actuated in such a way that, on the one hand, the supply line is connected on the output side to an air inlet 21 of the ventilation valve 13.
  • the pressure port 11 of the pump unit 2 is connected to a discharge pipe 20 led to the storage tank 3.
  • the switching valve 6 is operated such that the return passage 14 is now brought into flow communication with the suction-side port 7 of the pump unit 2.
  • the suction pipe 5 is stromungsintuitig separated from the suction-side terminal 7 of the pump unit 2.
  • the aeration mode is preferably maintained until at least the supply line 12 is vented. This is the case when the previously existing HWL is almost completely empty from it, ie. was displaced by ambient air.
  • a ventilation of at least the first portion 14 of the return line is provided.
  • the decanter system of the fluid pump 10 relevant for the HWL requirement remains substantially filled with HWL in the aeration mode. This improves the suction effect and a refilling of the emptied lines at a restart. Likewise, the suction line 5 remains substantially filled with HWL.
  • the liquid pump 10 is switched off.
  • a ventilation that has taken place can also be detected by sensors that may be present and the termination of the ventilation mode can be triggered by them.
  • the metering system 1 is restarted, it is switched to the metering mode shown in FIG. This is done first exne venting or Wiederbefullung the previously vented lines and components. In order to ensure this, in the case of a clocked proportional valve 16, this initially remains switched to zero-current until the refilling is completed. Subsequently, the actual dosing operation can be resumed.

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)

Abstract

L'invention concerne un système de dosage destiné à doser un liquide dans un collecteur d'échappement, qui est raccordé à un moteur à combustion interne d'un véhicule automobile, ainsi qu'un procédé de mise en œuvre d'un système de dosage. On propose un système de dosage (1), qui comprend un réservoir de stockage (3) pour le liquide, une soupape de dosage (4), pour le liquide, une pompe pour liquides (10) et une conduite d'amenée (12) destinée à amener le liquide à la soupape de dosage (4). Le système de dosage (1) présente en outre une soupape de ventilation (13) raccordée de manière commutable à la conduite d'amenée (12), qui permet de passer d'un mode de dosage à un mode de ventilation, la soupape de ventilation (13) permettant une ventilation de la conduite d'amenée (12). Selon l'invention, dans le mode de ventilation, un refoulement du liquide présent dans la conduite d'amenée (12) est provoqué par l'air ambiant, suite à un actionnement de la pompe pour liquides (10).
PCT/EP2007/010457 2006-12-22 2007-12-01 Système de dosage et procédé de mise en œuvre d'un système de dosage WO2008080477A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07846946A EP2150687A1 (fr) 2006-12-22 2007-12-01 Système de dosage et procédé de mise en uvre d'un système de dosage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006060838A DE102006060838A1 (de) 2006-12-22 2006-12-22 Dosiersystem und Verfahren zum Betreiben eines Dosiersystems
DE102006060838.0 2006-12-22

Publications (1)

Publication Number Publication Date
WO2008080477A1 true WO2008080477A1 (fr) 2008-07-10

Family

ID=39036496

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/010457 WO2008080477A1 (fr) 2006-12-22 2007-12-01 Système de dosage et procédé de mise en œuvre d'un système de dosage

Country Status (3)

Country Link
EP (1) EP2150687A1 (fr)
DE (1) DE102006060838A1 (fr)
WO (1) WO2008080477A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008059205B9 (de) 2008-11-27 2012-12-27 Hahn-Schickard-Gesellschaft für angewandte Forschung e.V. Bidirektionale Fördervorrichtung
DE102011010784A1 (de) * 2011-02-09 2012-08-09 Rolf Prettl Harnstoffeinspritzsystem und Ventilanordnung hierfür
DE102011077953A1 (de) * 2011-06-22 2012-12-27 Robert Bosch Gmbh Einspritzvorrichtung
DE102012204100A1 (de) * 2012-03-15 2013-09-19 Robert Bosch Gmbh Fluidfördersystem und Verfahren zum Fördern eines Fluids
US10914231B2 (en) 2018-08-21 2021-02-09 Ryan Harold SALENBIEN Hub-less and nut-less turbine wheel and compressor wheel design for turbochargers

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000021881A1 (fr) * 1998-10-13 2000-04-20 Clean Diesel Technologies, Inc. REDUCTION D'EMISSIONS DE NOx D'UN MOTEUR PAR INJECTION D'UREE A TEMPERATURE CONTROLEE DANS UN PROCEDE DE REDUCTION SELECTIVE CATALYTIQUE
DE102004054238A1 (de) * 2004-11-10 2006-05-11 Robert Bosch Gmbh Dosiersystem sowie Verfahren zum Betreiben eines Dosiersystems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000021881A1 (fr) * 1998-10-13 2000-04-20 Clean Diesel Technologies, Inc. REDUCTION D'EMISSIONS DE NOx D'UN MOTEUR PAR INJECTION D'UREE A TEMPERATURE CONTROLEE DANS UN PROCEDE DE REDUCTION SELECTIVE CATALYTIQUE
DE102004054238A1 (de) * 2004-11-10 2006-05-11 Robert Bosch Gmbh Dosiersystem sowie Verfahren zum Betreiben eines Dosiersystems

Also Published As

Publication number Publication date
EP2150687A1 (fr) 2010-02-10
DE102006060838A1 (de) 2008-06-26

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