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WO2016015792A1 - Système de dosage d'agent réducteur avec amortissement du transport d'agent réducteur - Google Patents

Système de dosage d'agent réducteur avec amortissement du transport d'agent réducteur Download PDF

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Publication number
WO2016015792A1
WO2016015792A1 PCT/EP2015/001028 EP2015001028W WO2016015792A1 WO 2016015792 A1 WO2016015792 A1 WO 2016015792A1 EP 2015001028 W EP2015001028 W EP 2015001028W WO 2016015792 A1 WO2016015792 A1 WO 2016015792A1
Authority
WO
WIPO (PCT)
Prior art keywords
reducing agent
piston
compressed air
pump
nozzle
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.)
Ceased
Application number
PCT/EP2015/001028
Other languages
German (de)
English (en)
Inventor
Enzo Falbo
Werner Overhoff
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.)
Albonair GmbH
Original Assignee
Albonair 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 Albonair GmbH filed Critical Albonair GmbH
Priority to CN201580022569.0A priority Critical patent/CN106460608B/zh
Publication of WO2016015792A1 publication Critical patent/WO2016015792A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/2066—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
    • 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
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1433—Pumps
    • F01N2610/144—Control thereof
    • 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
    • F01N2610/1446—Means for damping of pressure fluctuations in the delivery system, e.g. by puffer volumes or throttling
    • 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
    • F01N2610/1486—Means to prevent the substance from freezing
    • 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

Definitions

  • the invention relates to a Reduktionsffendosiersystem for injection of a reducing agent in the exhaust stream of an internal combustion engine for selective catalytic reduction, with a feed pump, sucked by means of which reducing agent from a reducing agent tank via a suction line from the tank and conveyed via a pressure line and via at least one nozzle in the exhaust stream of the Internal combustion engine is initiated.
  • the invention relates to a method for operating a Reduktionsffendosiersystems for injecting a reducing agent into the exhaust stream of an internal combustion engine for selective catalytic reduction, with a magnetic piston pump as a feed pump, sucked by means of which reducing agent from a reducing agent tank via a suction line from the tank and conveyed via a pressure line and over at least one nozzle is introduced into the exhaust gas flow of the internal combustion engine, wherein the piston movement is brought about by driving one or more cylindrical coils.
  • SCR Selective Catalytic Reduction
  • a reducing agent in the exhaust system with a Dosing metered a reducing agent in the exhaust system with a Dosing metered.
  • the reducing agent used is ammonia or an ammonia solution or another reducing agent.
  • urea is used in aqueous solution with usually 32.5% urea content, in particular according to DIN 70070.
  • the urea decomposes at temperatures above 150 ° Celsius into gaseous ammonia and CO 2 .
  • Parameters for the decomposition of the urea are essentially time (evaporation and reaction time), temperature and droplet size of the injected urea solution.
  • SCR selective catalytic reduction
  • the reducing agent solution is conveyed by means of a magnetic piston pump to the nozzle. It has been shown that occurs by the pulse in the delivery line after a delivery stroke of the magnetic piston pump uncontrolled subsequent delivery of the reducing agent. Furthermore, it has been shown that due to a high piston speed in a delivery stroke, the hydraulic fluid does not flow as desired through the control bores from the cylinder, but instead hydraulic fluid is conveyed even before closing the control bores, resulting in a promotion of too much reducing agent due to increased deflection of the conveyor diaphragm , which makes an exact dosage difficult.
  • the object of the invention is to form a Reduktionsffendosiersystem of the type mentioned on and provide a method for operating a Reduktionsffendosiersystems, so that an exact dosage of the reducing agent allows and unwanted over-promotion or Nachdisposed after a delivery stroke is reliably prevented.
  • the reducing agent metering system may comprise a pump unit containing the feed pump. This pump unit may have additional components, in particular switching valves and / or sensors, in addition to the delivery pump.
  • suction line designates the delivery line from the reducing agent tank to the suction mouth of the delivery pump.
  • a bidirectional rubber valve In this suction line a bidirectional rubber valve is arranged.
  • a bidirectional rubber valve In such a bidirectional rubber valve is a passive component which automatically opens when a corresponding pressure difference between the two sides of the bidirectional rubber valve and releases the flow channel and vice versa automatically closes the flow channel again falls below the required pressure difference on both sides of the bidirectional rubber valve ,
  • an undesirable Nachrucn of Reducing agent reliably prevented due to the pulse in the delivery line after a delivery stroke of the feed pump.
  • reducing agent metering system or metering system are used synonymously in the context of the invention.
  • the term reducing agent solution or reducing agent includes any reducing agent suitable for selective catalytic reduction, preferably a urea solution according to DIN 70070 is used for this purpose.
  • the pressure line has a throttle. It has been shown that especially the arrangement of a bidirectional rubber valve in the suction line in combination with a throttle in the pressure line allows a particularly accurate dosing of the reducing agent and reliably prevents unwanted over-delivery or Nachêt after a delivery.
  • the system preferably has a component carrier on which the delivery pump is mounted, and wherein a suction channel to the pump inlet and a pressure channel adjoining the pump outlet are integrated into the component carrier, wherein the component carrier has a mounting region in which the rubber valve is integrated into the suction channel is.
  • the reducing agent metering system has a tank to which the suction line is connected.
  • the reducing agent solution is filled into the tank and stored in the tank for the operation of the system.
  • the reducing agent solution is removed from the tank and conveyed by means of the feed pump and introduced via at least one nozzle in the exhaust gas stream of the internal combustion engine.
  • the system has a compressed air supply and the reducing agent is atomized inside or outside the nozzle by means of compressed air.
  • the compressed air supply may have a switching valve and / or a pressure regulating valve. This switching valve is used to control, d. H. the switching on and off of the compressed air supply for all or part of the dosing system.
  • the compressed air supply may have a pressure regulating valve.
  • the compressed air can be adjusted to a desired level for atomization of the reducing agent by means of compressed air pressure level.
  • the compressed air itself can be taken from an on-board compressed air system, such as a commercial vehicle, in the exhaust system, the dosing is arranged without the prevailing system pressure in the compressed air system is a limitation, since the pressure of the compressed air can be lowered to the desired pressure.
  • a compressed air supply is provided, wherein the reducing agent is atomized inside or outside the nozzle by means of compressed air.
  • a mixing chamber may be provided, within which an atomization of the reducing agent by means of the compressed air takes place even before the introduction into the exhaust gas tract.
  • the nozzle is an externally mixing two-fluid nozzle in which the reducing agent solution emerges from a first nozzle opening and compressed air emerges from a second nozzle opening, the two nozzle openings being aligned with one another in such a way that the compressed air atomizes the reducing agent outside the nozzle so that the nozzle is designed as an externally mixing two-substance nozzle and forms the aerosol takes place outside the nozzle.
  • the second opening of the nozzle is positioned in such a way, in particular positioned at an angle relative to the jet direction of the first opening of the nozzle, that by means of the compressed air emerging from the second opening, the reducing agent emerging from the first opening is atomized.
  • the pressure line is connected via a switching valve or control valve to a compressed air supply to free the pressure line and the nozzle after completion of the dosage by means of compressed air from reducing agent.
  • a compressed air supply is provided, wherein the reducing agent-conveying pressure line and thus the nozzle are connected via a switching valve to the compressed air supply to free them after completion of the dosage by means of compressed air from reducing agent.
  • the reducing agent-conveying pressure line and the nozzle and / or a metering chamber and / or the dosing can be freed after completion of the dosage by means of the compressed air from the reducing agent solution to prevent freezing or crystallization of the reducing agent solution. This can effectively prevent frost damage and blockage.
  • the compressed air can thus be used alternatively or cumulatively for atomizing the reducing agent in the exhaust line and for cleaning the reducing agent-carrying lines after the end of the dosage.
  • the pressure in the pressure line is detected and monitored by means of a pressure sensor.
  • a pressure sensor By such detection and monitoring of Pressure in the reducing agent leading pressure line can also be the correct operation of the feed pump and the dosage continuously monitored.
  • the system preferably has a heating device for heating the reducing agent solution.
  • the widely used reducing agent solution according to DIN 70070 freezes due to its water content at about -11 ° C. Therefore, it is necessary to provide a heating device, for example inside the tank and / or in thermal coupling to the suction line and / or pressure line for heating the reducing agent solution in the case of very low ambient temperatures.
  • the feed pump is preferably a piston pump, in particular a magnetic piston pump.
  • a magnetic piston pump one or more cylindrical coils, by means of which a magnetic field is generated, arranged.
  • the piston movement of the magnetic piston is controlled by the magnetic field generated by the coils.
  • a reducing agent in a method for operating a reducing agent metering system for injecting a reducing agent into the exhaust gas stream of a selective catalytic reduction internal combustion engine, it is possible for a reducing agent to be sucked from a reducing agent tank via a suction line from the tank and conveyed via a pressure line and is introduced via at least one nozzle in the exhaust stream of the internal combustion engine, wherein the piston movement is controlled by driving one or more cylindrical coils, by means of which a magnetic field is generated, to provide that a pulse-width modulated control of the / the solenoid / n depending on the current Position, speed and direction of movement of the piston takes place.
  • control of the / the cylindrical coil / n is meant the time-variable energization of the coil / n, by each of which a resulting magnetic field is generated, which exerts a resultant force on the magnetic piston.
  • a resulting magnetic force of the piston is reciprocated in the cylinder of the magnetic piston pump between the top dead center and the bottom dead center and thereby accelerated or decelerated.
  • the duty cycle ie the quotient of duty cycle to off duration of energization of the / the cylindrical coil / n during a cycle, varies, resulting in a time-varying resulting magnetic field / of the cylinder / n results.
  • This in turn follows a time-varying resulting on the piston resulting magnetic force and the resulting variable piston acceleration or piston speed.
  • the duty cycle By varying the duty cycle, the arithmetic mean of the electrical voltage can be changed. Accordingly, by a pulse width modulated control of the solenoid / n a magnetic piston pump, the resulting force acting on the piston magnetic force can be controlled.
  • the application of the method for operating a Reduktionsffendosiersystems can be done alternatively to the development of the invention also in a generic Reduktionsffendosiersystem according to the prior art.
  • the control of the cylinder coil (s) is preferably carried out such that the piston is slowed down during a delivery stroke at the level of the control bores via which hydraulic fluid is supplied.
  • the control of the cylinder coil (s) is preferably carried out such that the piston is slowed down during a suction stroke at the level of the control bores via which hydraulic fluid is supplied.
  • the control of the / of the cylinder / n is such that the piston is decelerated to complete a delivery stroke before top dead center.
  • FIG. 1 shows a schematic representation of the reducing agent metering system 10 for injecting a reducing agent into the exhaust gas flow of an internal combustion engine (not shown) for selective catalytic reduction.
  • reducing agent solution is sucked from the tank 40 and conveyed via the pressure line 50 to the injection nozzle 60 via the suction line.
  • the reducing agent is injected into the exhaust stream of the engine.
  • a bidirectional rubber valve 70 is arranged in the suction line 30.
  • FIG. 1, Fig. 2 An enlarged view of the metering system of FIG. 1, Fig. 2 in section.
  • the pump 20 is arranged on a component carrier 15. Integrated into the component carrier 15 are the integrated suction line 30 'and the integrated pressure line 50'.
  • the pump 20 and the component carrier 15 are adapted to one another in such a way that the suction line 30 'integrated in the component carrier 15 opens directly into the pump inlet of the pump 20 and, furthermore, the pump outlet of the pump 20 discharges directly into the pressure line 50' integrated in the component carrier 15.
  • FIG. 2 shows the valve seat 16 integrated in the component carrier 15 for receiving the bidirectional rubber valve 70.
  • the bidirectional rubber valve 70 is fixed in the valve seat by the valve carrier 31, which in turn is an integral part of the suction line 30.
  • the suction line 30 is connected to the tank, not shown in FIG.
  • the valve carrier 31 is sealed against the valve seat 16 in the component carrier 15 by means of the sealing surface of the bidirectional rubber valve and additionally by means of an O-ring 35.
  • FIG. 3 shows the bidirectional rubber valve 70 in a plan view and the section AA. Recognizable in the plan view of the rubber valve 70 is the opening slot 71. When a corresponding pressure difference across the bidirectional rubber valve 70 is applied, the opening slot 71 opens automatically. Conversely, the opening slit 71 closes automatically due to its restoring forces in the moment when the required pressure difference across the bidirectional rubber valve 70 falls below the required opening pressure.
  • Fig. 4 is a view of the feed pump 20 is shown in section.
  • the feed pump 20 is an electromagnetic piston pump in which the piston 21 by the construction of a corresponding magnetic field by means of a solenoid 22, that is moved by the magnetic field generated by a solenoid 22 and the resulting force acting on the piston 21 magnetic force becomes.
  • the drive of the piston 21 by a corresponding control of the cylindrical coil 22 takes place in the extension direction of the piston 21, that is, during a delivery stroke of the piston 21 in the direction of the top dead center.
  • the piston 21 is reset by means of a spring 23, as can be seen in FIG.
  • the space surrounding the piston with the cylindrical coil is filled with hydraulic fluid, wherein a lubrication of the piston and the filling of the displacement takes place via corresponding control bores 24.
  • the actual delivery volume of the pump 20 is formed by the cylinder volume 25th
  • FIGS. 4 to 8 show the respective piston positions during a delivery cycle, which correspond to the individual phases A to G according to FIG.
  • the first phase A with 10O per cent control is followed by a second phase B at high speed of the piston.
  • phase B the hydraulic fluid is to be displaced into the control bores 24 of the pump provided for this purpose, as shown in FIG. 5 and indicated schematically by the arrows 24 '.
  • the hydraulic fluid normally flows not only through the control bores 24 provided in front of it, but also a part also towards the diaphragm chamber.
  • the piston is kept at a low speed in the reduced duty cycle pulse width modulation movement phase B illustrated in FIG.
  • phase C After the piston has swept over the control bores 24 and their control edges 25 'and reaches the level of the level 25' at the beginning of the actual cylinder volume 25, as indicated in FIG. 6, the phase C according to FIG. 9.
  • a control of the solenoid with a higher duty cycle so that the piston is accelerated again, as can be read from the path-time diagram of Figure 9 of the piston movement and the also entered in Fig. 9 duty cycle can be seen.
  • the actual delivery of the cylinder volume 25 of the pump 20 takes place.
  • the piston 21 After reaching the top dead center OT, the piston 21 is moved back to the bottom dead center by means of the spring 23, whereby a corresponding suction of reducing agent via the suction line 30 takes place.
  • phase D indicated by the position of the piston 21 according to FIG. 7 at the top dead center OT or illustrated in FIG. 9, begins when the piston has reached the top dead center OT.
  • FIG. 9 clearly shows the lower piston speed at the level of the control bores 24 from the lower control edge 25 'of the control bores Hydraulic fluid from the control bores 24, as indicated by the arrows 24 "in Fig. 8 schematically.
  • the entire cycle of movement is shown in FIG. 9 in a general overview.
  • recognizable in the path-time diagram are the sections A - D during the delivery stroke and subsequently the phase E to G corresponding to the intake stroke of the pump.
  • the corresponding pulse width modulated control of the solenoid ie the respective change of the duty cycle
  • the respective duty cycle in the control of the solenoid coil is recognizable in the lower part of Fig. 9, that is, it is the course of the switch-on or shutdown in the energization of the solenoid of the piston pump shown.
  • T1 a first time period
  • the piston Shortly before the impact of the piston at bottom dead center UT, the piston is braked again with an increased duty cycle in the time period T9 in order to prevent an impact here as well.
  • the delivery cycle starts again from the beginning after a corresponding pause time, depending on the dosing quantity requirement.
  • the special pulse width modulated control increases the dosing accuracy of a diaphragm or piston pump. Further, we reduce the conveying speed of the reducing agent during a delivery stroke of a diaphragm or piston pump by the special pulse width modulated control and thus the formation of a finer spray is given with a two-fluid nozzle.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un système de dosage d'agent réducteur (10) destiné à injecter un agent réducteur dans le flux de gaz d'échappement d'un moteur à combustion interne pour effectuer une réduction catalytique sélective. Le système comprend une pompe d'alimentation (20) qui permet d'aspirer l'agent réducteur d'un réservoir d'agent réducteur (40) par un conduit d'aspiration (30) sortant du réservoir (40), de le transporter par le biais d'un conduit sous pression (50) et de l'introduire par le biais d'au moins une buse (60) dans le flux de gaz d'échappement du moteur à combustion interne. Le conduit d'aspiration (30) comporte une vanne bidirectionnelle (70) en caoutchouc.
PCT/EP2015/001028 2014-07-28 2015-05-20 Système de dosage d'agent réducteur avec amortissement du transport d'agent réducteur Ceased WO2016015792A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201580022569.0A CN106460608B (zh) 2014-07-28 2015-05-20 具有受抑制的还原剂输送的还原剂计量系统

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014010948.8A DE102014010948A1 (de) 2014-07-28 2014-07-28 Reduktionsmitteldosiersystem mit Dämpfung der Reduktionsmittelförderung
DE102014010948.8 2014-07-28

Publications (1)

Publication Number Publication Date
WO2016015792A1 true WO2016015792A1 (fr) 2016-02-04

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PCT/EP2015/001028 Ceased WO2016015792A1 (fr) 2014-07-28 2015-05-20 Système de dosage d'agent réducteur avec amortissement du transport d'agent réducteur

Country Status (3)

Country Link
CN (1) CN106460608B (fr)
DE (1) DE102014010948A1 (fr)
WO (1) WO2016015792A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019219378A1 (fr) * 2018-05-14 2019-11-21 Norma Germany Gmbh Système fluidique et utilisation d'une soupape de presson bidirectionnelle

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111120054B (zh) * 2019-12-30 2021-04-16 潍柴动力股份有限公司 一种减少发动机scr箱尿素结晶的控制方法
DE102020004766A1 (de) * 2020-08-06 2022-02-10 Albonair Gmbh Beheizte Einspritzdüse zur Reduktionsmittelaufbereitung und Reduktionsmitteldosiersytem
CN113530655B (zh) * 2021-08-11 2022-11-22 一汽解放汽车有限公司 尿素结晶检测装置、处理方法、装置、设备和存储介质
CN115962071A (zh) * 2021-10-08 2023-04-14 纬湃技术有限公司 具有用于控制流体流的阀的流体输送设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5299916A (en) * 1991-12-17 1994-04-05 Siemens Aktiengesellschaft Liquid-ring pump having an outlet means including a noise reducing flexible membrane
US5884475A (en) * 1994-09-13 1999-03-23 Siemens Aktiengesellschaft Method and device for introducing liquid into an exhaust-gas purification system
DE19940298A1 (de) * 1999-08-25 2001-03-01 Bosch Gmbh Robert Verfahren und Vorrichtung zur Bestimmung eines Reduktionsmittels und/oder der Reduktionsmittelkonzentration einer Reduktionsmittellösung in einem Katalysatorsystem zugeordneten Reduktionsmitteltank
DE102009005790A1 (de) * 2009-01-22 2010-07-29 Albonair Gmbh Dosiersystem
EP2253351A1 (fr) * 2009-04-28 2010-11-24 Dräger Medical AG & Co. KG Soupape à rainure en combinaison avec un circuit pneumatique d'un appareil respiratoire
DE102011002427A1 (de) * 2011-01-04 2012-07-05 Robert Bosch Gmbh Doppelrückschlagventil zur bidirektionalen Durchflusskontrolle von gasförmigen und/oder flüssigen Medien sowie Verwendung des Doppelrückschlagventils
DE102011107609A1 (de) * 2011-06-30 2013-01-03 Albonair Gmbh Reduktionsmitteleinspritzdüse und Verfahren zur Herstellung einer Reduktionsmitteleinspritzdüse

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4432577A1 (de) * 1994-09-13 1996-03-14 Siemens Ag Einrichtung zur Einbringung einer Flüssigkeit in ein Strömungsmedium
DE10048246A1 (de) * 2000-09-29 2002-04-11 Bosch Gmbh Robert Vorrichtung zur Erzeugung eines Reduktionsmittel-Luft-Gemisches
CN103742383A (zh) * 2014-01-23 2014-04-23 苏州派格丽减排系统有限公司 用于scr减排系统的储能式增压电磁柱塞泵及计量喷射系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5299916A (en) * 1991-12-17 1994-04-05 Siemens Aktiengesellschaft Liquid-ring pump having an outlet means including a noise reducing flexible membrane
US5884475A (en) * 1994-09-13 1999-03-23 Siemens Aktiengesellschaft Method and device for introducing liquid into an exhaust-gas purification system
DE19940298A1 (de) * 1999-08-25 2001-03-01 Bosch Gmbh Robert Verfahren und Vorrichtung zur Bestimmung eines Reduktionsmittels und/oder der Reduktionsmittelkonzentration einer Reduktionsmittellösung in einem Katalysatorsystem zugeordneten Reduktionsmitteltank
DE102009005790A1 (de) * 2009-01-22 2010-07-29 Albonair Gmbh Dosiersystem
EP2253351A1 (fr) * 2009-04-28 2010-11-24 Dräger Medical AG & Co. KG Soupape à rainure en combinaison avec un circuit pneumatique d'un appareil respiratoire
DE102011002427A1 (de) * 2011-01-04 2012-07-05 Robert Bosch Gmbh Doppelrückschlagventil zur bidirektionalen Durchflusskontrolle von gasförmigen und/oder flüssigen Medien sowie Verwendung des Doppelrückschlagventils
DE102011107609A1 (de) * 2011-06-30 2013-01-03 Albonair Gmbh Reduktionsmitteleinspritzdüse und Verfahren zur Herstellung einer Reduktionsmitteleinspritzdüse

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019219378A1 (fr) * 2018-05-14 2019-11-21 Norma Germany Gmbh Système fluidique et utilisation d'une soupape de presson bidirectionnelle

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CN106460608A (zh) 2017-02-22
CN106460608B (zh) 2020-07-03
DE102014010948A1 (de) 2016-01-28

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