WO2013079498A1 - Module de dosage - Google Patents

Module de dosage Download PDF

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Publication number
WO2013079498A1
WO2013079498A1 PCT/EP2012/073776 EP2012073776W WO2013079498A1 WO 2013079498 A1 WO2013079498 A1 WO 2013079498A1 EP 2012073776 W EP2012073776 W EP 2012073776W WO 2013079498 A1 WO2013079498 A1 WO 2013079498A1
Authority
WO
WIPO (PCT)
Prior art keywords
dosing
dosing module
valve body
dosiermodulumhausung
module
Prior art date
Application number
PCT/EP2012/073776
Other languages
German (de)
English (en)
Inventor
Martin Murst
Ulrich Meingast
Tobias Heiter
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2013079498A1 publication Critical patent/WO2013079498A1/fr

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 ; 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
    • F01N2260/024—Exhaust treating devices having provisions not otherwise provided for for cooling the device using a liquid
    • 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
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • 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 dosing module, in particular for dosing a reducing agent in an exhaust pipe of an internal combustion engine, wherein the
  • Metering module has a metering valve inserted into a Dosiermodulumhausung, which has a valve body with a cantilevered side port, and wherein the metering module is associated with a cooling device, which is flowed through by a cooling liquid.
  • Such a metering module is known from DE 10 2009 047 375 A1. This metering module has an inserted into a Dosiermodulumhausung
  • Valve body and a cooling device wherein the cooling device can be designed in different variants.
  • the dosing module housing is surrounded by a rib-shaped and cylindrical air-cooled heat sink, which constitutes the cooling device.
  • Another variant provides that the Dosiermodulumhausung is enclosed by a cylindrical heat sink, the two laterally projecting
  • Terminals in the form of angled pipe ends is formed.
  • the metering valve or the valve body is inserted centrally into the Dosiermodulumhausung and this in turn is surrounded by a tube-like, cylindrical or rotationally symmetrical cooling device. All of these designs require a large amount of space.
  • the invention has for its object to provide a metering module that requires a reduced space.
  • valve body of the metering valve is arranged eccentrically in the Dosiermodulumhausung and that the
  • Deachstechnik or Ausachstechnik is aligned to the opposite side to the terminal.
  • the Deachstician is aligned so that the opposite side of the valve body is arranged to the lateral connection closer to the wall of Dosiermodulumhausung as the side with the side port.
  • Embodiment emits a valve tip of the valve body also off-center in the associated end face of Dosiermodulumhausung.
  • the cooling device is within the
  • Dosing module housing arranged and has cooling liquid connections, which are arranged on a ceiling-shaped upper housing part of Dosiermodulumhausung on the opposite side of the exhaust pipe side.
  • the coolant connections are preferably parallel to one
  • Housing upper part is arranged. Consequently, all liquid connections are coaxial with one another and, for example, can be continued in a bundled manner. This embodiment also contributes to one Reduction of the installation space requirement. Alternatively, the
  • Coolant connections should also be arranged next to or parallel to the electrical connection.
  • the coolant connections are opposite each other in addition to the lateral connection to the
  • the lateral connection is an electrical connection.
  • This electrical connection is contacted with a wiring harness which is connected to a control module of the metering module or the internal combustion engine, and at least the metering module is controlled by this control module.
  • the harness connected to the electrical connection is more flexible with respect to the fluid lines and can be laid easily even in confined spaces.
  • the cooling liquid connections laterally
  • Cooling device and the Dosiermodulumhausung be designed with a significantly smaller diameter than if the coolant connections were located on the opposite side. Together with the eccentric arrangement of the valve body in the Dosiermodulumhausung this configuration a significant reduction in space over known
  • the dosing module has a valve body and a valve body tip at least partially surrounding the cooling chamber on the exhaust pipe side.
  • the valve body is cooled to the region of the valve body tip, so that, for example, evaporation of the reducing agent in the
  • valve body tip is sealingly connected to the Dosiermodulumhausung.
  • This connection can be made by appropriate thermal methods, such as welding or soldering (with appropriate materials of valve body and Dosiermodulumhausung) or else by suitable adhesive method.
  • the dosing module housing has a window in the region of the electrical connection. Through this window, which is arranged in the upper region of the housing upper part, the wiring harness for
  • FIG. 2 shows a longitudinal section through a second embodiment of a dosing module designed according to the invention
  • FIG. 3 shows a cross section through the dosing module according to FIG. 2.
  • the dosing module 1 shown in FIG. 1 is for dosing one
  • Dosing means designed in an exhaust pipe of an internal combustion engine is in particular a self-igniting internal combustion engine operated with diesel fuel, in the exhaust gas line of which devices for reducing harmful exhaust emissions are installed. Furthermore, an oxidation catalyst is incorporated in the exhaust pipe, which through the
  • the dosing agent for example in the form of an aqueous ammonia solution as
  • Reducing agent is supplied.
  • the introduction of the reducing agent are in the downstream catalyst, in particular a
  • Oxidation catalyst desired chemical processes, in particular a NO x conversion initiated.
  • Internal combustion engine is installed to build in order to shorten the time to the first NO x conversion after the start of the internal combustion engine, it requires, in the existing, usually limited space (engine compartment) to accommodate the required components. This contributes to a space reduction of the dosing by the inventive design.
  • the metering module 1 has a Dosiermodulumhausung 2, in the one
  • the Dosiermodulumhausung 2 has a lower housing part 4 and a housing upper part 5, which by means of a
  • Clamping device 6 which is for example a ring clamp or a V-clamp, are connected together.
  • a cooling device 7 in the form of a cooling chamber 8 is inserted, which in particular the valve body 3 surrounds in the region of a valve body tip 9.
  • the cooling liquid of the internal combustion engine may be, flows through.
  • the dosing module 1 protrudes with the lower housing part 4 and the valve body tip 9 into the exhaust pipe or into a pipe connected to the exhaust pipe.
  • the valve body tip 9 has in one
  • Mouth region 14 at least one injection opening, through which the dosing agent supplied through the valve body 3 is metered into the exhaust pipe.
  • the metering valve is actuated electromagnetically and has a laterally projecting on the valve body 3 connection in the form of an electrical connection 10 which is contactable with a wiring harness.
  • the valve body 3 has a Dosierstoffan gleich 1 1, which is attached to the housing upper part 5 designed as a lid.
  • the upper housing part 5 has a cylindrical guide ring 12. This guide ring 12 is formed so that it is the extension to the
  • Dosing means inlet includes sealing.
  • valve body 3 is further sealed in a central region by means of a seal 13 relative to the lower housing part 4 and finally the valve body tip 9 in the mouth region 14 is tightly connected to the lower housing part 4, for example welded.
  • cooling chamber 8 open two laterally adjacent to the electrical connection 11 arranged channels 16 which are connected to two cooling liquid connections 17 (see also Figure 3), which are arranged coaxially to the Dosierstoffan gleich 1 1 in the upper housing part 5 and fixed. Between the two channels 16 adjacent to the electrical connection 10, a window 18 is embedded in the housing upper part 5, through which the electrical connection 10 is accessible from the outside.
  • the Dosiermodulumhausung 2 has a circumferential flange which cooperates with a counter flange on an exhaust pipe 19. With a V-clamp 20 or a clip connection are the flange and the counter flange gastight connected to each other and thus the dosing 1 at the
  • the dosing module housing 2 can also be fastened to the exhaust pipe by means of a screw flange or via a screw connection.
  • Dosing module housing 2 to be welded to the exhaust pipe 19.
  • the cooling space 8 of the dosing module 1 shown in FIG. 2 is made larger and surrounds the valve body tip 9 of the valve body 3 eccentrically by utilizing the entire available installation space. This allows this temperature-sensitive
  • the channels 16 are formed in this embodiment rectilinear with the cooling liquid connections 17.
  • Dosiermodulumhausung 2 is compared to known embodiments of
  • Dosing module 1 unchanged. Overall, the dosing 1 has a diameter B, which is reduced by up to 30% compared to known embodiments of dosing 1.

Abstract

L'invention concerne un module de dosage (1), en particulier pour l'injection dosée d'un agent de réduction dans une conduite de gaz d'échappement d'un moteur à combustion interne. Le module de dosage (1) se compose d'une soupape de dosage placée dans une enceinte de module de dosage (2), ladite soupape présentant un corps de soupape (3) avec une extrémité latérale en porte-à-faux par rapport à celui-ci. Un dispositif de refroidissement (7), traversé par un fluide de refroidissement, est agencé sur le module de dosage. L'invention propose un module de dosage (1) qui nécessite un espace de construction réduit et qui permet l'utilisation du module de dosage (1) à des températures ambiantes élevées. Il est ainsi possible de placer le corps de soupape (3) de la soupape de dosage de manière excentrée dans l'enceinte du module de dosage (2) et de diriger l'excentration vers le côté opposé à l'extrémité de l'enceinte du module de dosage (2).
PCT/EP2012/073776 2011-11-29 2012-11-28 Module de dosage WO2013079498A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011087267.1 2011-11-29
DE102011087267A DE102011087267A1 (de) 2011-11-29 2011-11-29 Dosiermodul

Publications (1)

Publication Number Publication Date
WO2013079498A1 true WO2013079498A1 (fr) 2013-06-06

Family

ID=47263349

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/073776 WO2013079498A1 (fr) 2011-11-29 2012-11-28 Module de dosage

Country Status (2)

Country Link
DE (1) DE102011087267A1 (fr)
WO (1) WO2013079498A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008043021A1 (de) * 2007-10-22 2009-05-14 Denso Corp., Kariya-shi Abgassteuervorrichtung
DE102009032978A1 (de) * 2008-07-14 2010-01-21 Mitsubishi Jidosha Kogyo K.K. Abgasreinigungsvorrichtung
FR2948146A1 (fr) * 2009-07-14 2011-01-21 Bosch Gmbh Robert Module de dosage d'un agent reducteur liquide dans un systeme de gaz d'echappement d'un moteur a combustion interne
DE102009029348A1 (de) * 2009-09-10 2011-03-24 Robert Bosch Gmbh Einbringvorrichtung zur Einbringung eines Fluids
DE102009047375A1 (de) 2009-12-02 2011-06-09 Robert Bosch Gmbh Dosiermodul mit Flüssigkeitskühlung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008043021A1 (de) * 2007-10-22 2009-05-14 Denso Corp., Kariya-shi Abgassteuervorrichtung
DE102009032978A1 (de) * 2008-07-14 2010-01-21 Mitsubishi Jidosha Kogyo K.K. Abgasreinigungsvorrichtung
FR2948146A1 (fr) * 2009-07-14 2011-01-21 Bosch Gmbh Robert Module de dosage d'un agent reducteur liquide dans un systeme de gaz d'echappement d'un moteur a combustion interne
DE102009029348A1 (de) * 2009-09-10 2011-03-24 Robert Bosch Gmbh Einbringvorrichtung zur Einbringung eines Fluids
DE102009047375A1 (de) 2009-12-02 2011-06-09 Robert Bosch Gmbh Dosiermodul mit Flüssigkeitskühlung

Also Published As

Publication number Publication date
DE102011087267A1 (de) 2013-05-29

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