WO2018039209A1 - Éléments de dissipation de chaleur pour unité de distribution de réducteur pour système de réduction catalytique sélective d'automobile - Google Patents

Éléments de dissipation de chaleur pour unité de distribution de réducteur pour système de réduction catalytique sélective d'automobile Download PDF

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Publication number
WO2018039209A1
WO2018039209A1 PCT/US2017/047983 US2017047983W WO2018039209A1 WO 2018039209 A1 WO2018039209 A1 WO 2018039209A1 US 2017047983 W US2017047983 W US 2017047983W WO 2018039209 A1 WO2018039209 A1 WO 2018039209A1
Authority
WO
WIPO (PCT)
Prior art keywords
fin
flange portion
injector
mounting flange
thermally conductive
Prior art date
Application number
PCT/US2017/047983
Other languages
English (en)
Inventor
Stephen C. Bugos
Willem Nicolaas VANVUUREN
Original Assignee
Continental Automotive Systems, Inc.
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 Continental Automotive Systems, Inc. filed Critical Continental Automotive Systems, Inc.
Publication of WO2018039209A1 publication Critical patent/WO2018039209A1/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
    • 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
    • F01N2260/022—Exhaust treating devices having provisions not otherwise provided for for cooling the device using 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/20—Exhaust treating devices having provisions not otherwise provided for for heat or sound protection, e.g. using a shield or specially shaped outer surface of exhaust device
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/02—Surface coverings for thermal insulation
    • 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
    • F01N2610/11—Adding substances to exhaust gases the substance or part of the dosing system being cooled
    • 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 generally to one or more heat dissipation elements which are components of an injector that is used in a reductant delivery unit, where the reductant delivery unit is part of a selective catalytic reduction system.
  • New emissions legislation in Europe and North America is driving the implementation of new exhaust aftertreatment systems, particularly for lean-burn technologies such as compression-ignition (diesel) engines, and stratified-charge spark-ignited engines (usually with direct injection) that are operating under lean and ultra-lean conditions.
  • lean-burn engines exhibit high levels of nitrogen oxide emissions (NOx), that are difficult to treat in oxygen-rich exhaust environments, which are characteristic of lean-burn combustion.
  • NOx nitrogen oxide emissions
  • Exhaust aftertreatment technologies are currently being developed that treat NOx under these conditions.
  • One of these technologies includes a catalyst that facilitates the reactions of ammonia (NH3) with the exhaust nitrogen oxides (NOx) to produce nitrogen (N2) and water (H2O).
  • This technology is referred to as Selective Catalytic Reduction (SCR).
  • Ammonia is difficult to handle in its pure form in the automotive environment, therefore it is customary with these systems to use a liquid aqueous urea solution, typically at a 32% concentration of urea (CO(NH2)2).
  • the solution is referred to as AUS-32, or diesel exhaust fluid (DEF), and is also known under its commercial name of AdBlue.
  • the DEF is delivered to the hot exhaust stream and is transformed into ammonia in the exhaust after undergoing thermolysis, or thermal decomposition, into ammonia and isocyanic acid (HNCO).
  • HNCO ammonia and isocyanic acid
  • the isocyanic acid then undergoes a hydrolysis with the water present in the exhaust and is transformed into ammonia and carbon dioxide (CO2), the ammonia resulting from the thermolysis and the hydrolysis then undergoes a catalyzed reaction with the nitrogen oxides as described previously.
  • the delivery of the DEF solution to the exhaust involves precise metering of the DEF and proper preparation of the DEF to facilitate the later mixing of the ammonia in the exhaust stream.
  • the delivery of the DEF into the exhaust is typically achieved using some type of injector.
  • AUS-32 is known to decompose to various byproducts at elevated temperatures. These byproducts include biuret, cyanuric acid, melamine, and numerous others, as shown in Figure 1 .
  • the present invention is an injector having at least one heat dissipation element used for providing a highly conductive path for transferring heat away from a valve portion of the injector.
  • the heat dissipation element is a cylindrical element, or conductive plug, in contact with the injector valve body and the injector housing.
  • the cylindrical element is made of copper, but it is within the scope of the invention that any suitable thermally conductive material may be used, such as steel, nickel, aluminum, or the like.
  • the heat dissipation element may be made of a thermally insulating material in the event that over-temperature conditions are likely to arise from hot soak ambient conditions, where the thermally insulating material serves to prevent the ambient heat from arriving at the injector fluid path.
  • the injector includes cooling fins, each being in direct contact with the injector housing.
  • the fins may be used in combination with the cylindrical element to serve as an additional heat evacuation conduction path, allowing the heat to be dissipated by convection through the large surface area provided by the fins.
  • the present invention is an injector which includes an actuator, a valve portion, where the movement of the valve portion controlled by the actuator, and a lower valve body.
  • the valve portion is disposed in the valve body, and there is a thermally conductive plug which substantially surrounds a portion of the valve body.
  • the injector also includes an outer lower shield, and the thermally conductive plug is located in a cavity formed as part of the outer lower shield. At least one fin is attached to the outer lower shield, and the thermally conductive plug and the at least one fin transfer heat away from the valve portion.
  • the thermally conductive plug includes a through-aperture, and a portion of the lower valve body extends through the though-aperture.
  • the thermally conductive plug also includes an outer surface in contact with an outer wall of the outer lower shield, and a lower surface which is adjacent to the outer surface, such that the lower surface is in contact with a lower wall of the outer lower shield.
  • the at least one fin includes a circular mounting flange portion attached to the outer lower shield and a circular projecting flange portion integrally formed with the circular mounting flange portion. Heat is transferred away from the outer lower shield through the circular mounting flange portion.
  • the circular mounting flange portion is substantially perpendicular to the circular projecting flange portion.
  • each of the fins are attached to and circumscribe the outer lower shield.
  • each of the fins includes a circular mounting flange portion and a circular projecting flange portion, where the circular mounting flange portion of the first fin is adjacent the circular mounting flange portion of the second fin, and the circular mounting flange portion of the second fin is adjacent the circular mounting flange portion of the third fin.
  • the circular mounting flange portion of the first fin, the circular mounting flange portion of the second fin, and the circular mounting flange portion of the third fin for an outer circumferential wall connected to the outer lower shield. Heat is transferred away from the valve portion by the thermally conductive plug and each of the fins, preventing the valve portion and other parts of the injector from being exposed to undesired temperatures.
  • Figure 1 is graph depicting the various changes in physical properties of diesel exhaust fluid when exposed to different temperatures
  • Figure 2 is a perspective view of an injector having at least one heat dissipation element, according to embodiments of the present invention.
  • Figure 3 is a sectional view of an injector having at least one heat dissipation element, according to embodiments of the present invention.
  • FIG. 2-3 An injector having a heat dissipation device according to the present invention is shown in Figures 2-3, generally at 10.
  • the injector 10 has an inlet port 12 which receives diesel exhaust fluid (DEF).
  • the injector 10 also includes an inlet tube 14, where the DEF is able to flow through the inlet tube 14.
  • an actuator Disposed within the inlet tube 14 is an actuator, which in this embodiment is a solenoid, shown generally at 16.
  • the solenoid 16 includes an armature 18 partially disposed in the inlet tube 14.
  • the armature 18 is adjacent a pole piece 20, and moves relative to the pole piece 20.
  • the armature 18 includes a cavity, and partially disposed in the cavity is a return spring 22, and the return spring 22 is also partially surrounded by the pole piece 20.
  • the return spring 22 is also adjacent a stopper 24 such that the return spring 22 applies force to the stopper 24 and the armature 18.
  • a bobbin 26 Partially surrounding the inlet tube 14 is a bobbin 26, and surrounding the bobbin 26 is a coil 28. Portions of both the bobbin 26 and the coil 28 are surrounded by a housing 30, which is made of plastic, and also surrounds portions of the inlet tube 14. The housing 30 is also partially surrounded by an upper shield 32, which provides convection cooling to the parts of the injector 10 surrounded by the upper shield 32.
  • An upper end of a tube 34 is connected to the armature 18 through any suitable connection, which in this embodiment is a weld connection.
  • the lower end of the tube 34 is welded to a ball 36, which functions as part of a valve portion, shown generally at 38.
  • the valve portion 38 also includes a valve seat 40.
  • the valve seat 40 is mounted in the lower end of a lower valve body 42, and the lower valve body 42 is adjacent the inlet tube 14, such that the lower valve body 42 is partially surrounded by a lower inner shield 44. Movement of the ball 64 is partially controlled by a guide 46.
  • the guide 46 includes a guide aperture 48 through which the ball 36 moves, and also includes side apertures 50 which the DEF flows through.
  • the ball 36 rests on the valve seat 40 when the valve portion 38 is in the closed position.
  • the valve seat 68 also includes a central aperture 52, through which the DEF passes as the fluid exits the injector 10.
  • valve portion 38 During the operation of the injector 32, the valve portion 38, and more specifically the tube 34 and the ball 36, are biased by the return spring 22 to contact the valve seat 40, and therefore keep the valve portion 38 in a closed position.
  • the coil 28 When the coil 28 is energized, the armature 18 is drawn toward the pole piece 20. Energizing the coil 28 generates enough force to overcome the force of the return spring 22, and the armature 18 moves towards the pole piece 20. Because the tube 34 is connected to the armature 18, and the ball 36 is connected to the tube 34, the movement of the armature 18 towards the pole piece 20 moves the ball 36 away from the valve seat 40, opening the valve portion 38.
  • the valve portion 38 When the valve portion 38 is in an open position, the fluid flows from the inlet port 12 through the inlet tube 14, pole piece 20, armature 18, the tube 34, and out a plurality of exit apertures 54 formed as part of the tube 34. After the fluid flows out of the exit apertures 54, the fluid passes through the side apertures 50, and out the central aperture 52.
  • a seal Surrounding part of the lower inner shield 44 is a seal, which in this embodiment is a lower o-ring 56, and the lower o-ring 56 is surrounded by and in contact with an outer lower shield 58.
  • the outer lower shield 58 is connected to the upper shield 32, and is also connected to the lower end of the lower valve body 42, as shown in Figure 3. More specifically, the outer lower shield 58 is connected to the upper shield 32 at a first weld point 60, and is connected to the lower valve body 42 at a second weld point 62.
  • the outer lower shield 58 has a lower end, shown generally at 64, that surrounds the lower end of the lower valve body 42, such that the second weld point 62 provides a seal, preventing any DEF from leaking out of the injector 10 around the lower valve body 42.
  • the lower o-ring 56 also provides a sealing function to prevent any diesel exhaust fluid from migrating to the outer areas of the solenoid 16.
  • the outer lower shield 58 is formed such that the outer lower shield 58 has a cavity, shown generally at 66, and the lower valve body 42 and valve portion 38 are disposed in the cavity 66. Also disposed in the cavity 66 is a first heat dissipation element, which in this embodiment is a thermally conductive plug 68, which is in contact with and surrounds the lower valve body 42.
  • the thermally conductive plug 68 is generally cylindrical in shape, and has a through aperture 68a, through which a portion of the lower valve body 42 extends.
  • An outer surface 68b of the plug 68 is also in contact with an outer wall 70 of the outer shield 58, a lower surface 68c is in contact with a lower wall 72 (which is part of the lower end 64) of the outer shield 58, and an upper surface 68d of the plug 68 is also in contact with the lower inner shield 44.
  • the injector 10 also includes an internal gasket 74 which is in contact with the lower wall 72 of the outer shield 58, but on the opposite side of the lower wall 72 in comparison to the plug 68.
  • the internal gasket 74 is located on a bottom surface 76a of a cavity, shown generally at 76, of a v-clamp flange 78.
  • a portion of the outer shield 58 is also disposed in the cavity 76, as shown in Figure 3.
  • the internal gasket 74 also includes an aperture 80, and after DEF flows out of the central aperture 52, the DEF flows through the aperture 80, and into a dispersion area, shown generally at 82, of the v-clamp flange 78.
  • the v- clamp flange 78 also includes a notch portion 84, and disposed in the notch portion 84 is a main gasket 86.
  • the main gasket 86 also has an aperture 88, through which the DEF passes after flowing through the dispersion area 82.
  • the injector 10 also includes a second heat dissipation element, which in this embodiment is a plurality of fins, shown generally at 90. More specifically, there are three fins 90a,90b,90c, and each fin 90 is substantially similar.
  • Each fin 90 includes a circular mounting flange portion 92, and a circular projecting flange portion 94.
  • the flange portions 92,94 are integrally formed with one another, and are substantially perpendicular to one another.
  • the circular mounting flange portion 92 of each fin 90 is welded to the outer wall 70 of the outer shield 58.
  • the circular mounting flange portion 92 of the first fin 90a and the second fin 90b are substantially the same size.
  • each circular mounting flange portion 92 of the third fin 90c is larger in comparison to the circular mounting flange portion 92 of the first two fins 90a,90b, and is partially located in the cavity 76 of the v-clamp flange 78.
  • the circular mounting flange portion 92 of the third fin 90c is also connected to the side wall of the v- clamp flange 78.
  • Each circular mounting flange portion 92 has a lower edge 96, and each fin 90 includes a bend portion 98, where the circular mounting flange portion 92 and the circular projecting flange portion 94 intersect with one another.
  • each fin 90a,90b,90c are all in substantial alignment with one another, and adjacent one another.
  • Each circular mounting flange portion 92 is positioned relative to one another so as to form a continuous wall, or an outer circumferential wall, shown generally at 100, which surrounds part of the outer wall 70 of the outer lower shield 58.
  • the injector 10 Since the injector 10 is designed for use in environments having temperatures ranging from -40°C to 160°C, the components of the injector 10 are exposed to high temperatures, and the heat must be dissipated in order to prevent damage to the components of the injector 10.
  • the DEF passes through the tube 34, and out the plurality of exit apertures 54, and then the fluid passes through the side apertures 50, and out the central aperture 52.
  • the heat from the DEF exposes these components to the elevated temperatures.
  • the thermally conductive plug 68 transfers heat away from the lower valve body 42, and the areas around the tube 34, the guide 46, and the valve seat 40.
  • the fins 90a,90b,90c also transfer heat away from these components.
  • the outer circumferential wall 100 absorbs heat, such that the heat is transferred to each of the circular projecting flange portions 94.
  • the flange portions 94 having a substantially circular shape, and being in the shape of a flange, increases the surface area available for heat dissipation, increasing efficiency.
  • each of the gaskets 74,86 also provides thermal isolation to control heat dissipation from the injector 10.
  • the thermally conductive plug 68 is press-fit into the outer lower shield 58.
  • the plug 68 may be welded into the outer lower shield 58, or connected to the outer lower shield 58 in any other suitable manner.
  • the plug 68 in this embodiment is made of copper.
  • other materials such as steel, aluminum, nickel, or other suitable materials may be used.
  • other materials may be used, such as a thermally insulating material. This material may be used in the event that overtemperature conditions arise from hot soak ambient conditions, where the thermally insulating material serves to prevent the ambient heat from affecting the temperature of the injector fluid.
  • three fins 90a,90b,90c are used. However, it is within the scope of the invention that more or less fins may be used.

Abstract

Injecteur ayant au moins un élément de dissipation de chaleur utilisé pour fournir un trajet hautement conducteur pour évacuer de la chaleur d'une partie de soupape d'un injecteur. Dans un mode de réalisation, l'élément de dissipation de chaleur est un élément cylindrique, ou un bouchon conducteur, en contact avec le corps de soupape d'injecteur et le boîtier d'injecteur. Dans un autre mode de réalisation, l'élément de dissipation de chaleur se présente sous la forme d'une pluralité d'ailettes de refroidissement, chacune étant en contact direct avec le boîtier d'injecteur. Les ailettes peuvent être utilisées en combinaison avec l'élément cylindrique pour servir de trajet de conduction d'évacuation de chaleur supplémentaire, permettant à la chaleur d'être dissipée par convection à travers la grande surface fournie par les ailettes. L'élément cylindrique peut être en cuivre, mais il est également admis dans le cadre de l'invention que tout matériau thermo-conducteur approprié peut être utilisé.
PCT/US2017/047983 2016-08-23 2017-08-22 Éléments de dissipation de chaleur pour unité de distribution de réducteur pour système de réduction catalytique sélective d'automobile WO2018039209A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15/244,285 2016-08-23
US15/244,285 US20180058291A1 (en) 2016-08-23 2016-08-23 Heat dissipation elements for reductant delivery unit for automotive selective catalytic reduction system

Publications (1)

Publication Number Publication Date
WO2018039209A1 true WO2018039209A1 (fr) 2018-03-01

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Country Status (2)

Country Link
US (1) US20180058291A1 (fr)
WO (1) WO2018039209A1 (fr)

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DE102015217673A1 (de) 2015-09-15 2017-03-16 Continental Automotive Gmbh Einspritzvorrichtung zur Zumessung eines Fluids und Kraftfahrzeug mit einer derartigen Einspritzvorrichtung
US10539057B2 (en) * 2017-09-14 2020-01-21 Vitesco Technologies USA, LLC Injector for reductant delivery unit having reduced fluid volume
US11041421B2 (en) * 2018-02-01 2021-06-22 Continental Powertrain USA, LLC Injector for reductant delivery unit having fluid volume reduction assembly
US10947880B2 (en) 2018-02-01 2021-03-16 Continental Powertrain USA, LLC Injector for reductant delivery unit having fluid volume reduction assembly

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DE102010030920A1 (de) * 2010-07-05 2012-01-05 Robert Bosch Gmbh Ventil für ein flüssiges Medium
DE102011081145A1 (de) * 2011-08-17 2013-02-21 Robert Bosch Gmbh Vorrichtung zum Befestigen eines Injektors an einem Abgasstrang
EP2664760A1 (fr) * 2012-05-15 2013-11-20 Toyota Jidosha Kabushiki Kaisha Structure de dissipation de chaleur d'une valve d'injection
DE102012209106A1 (de) * 2012-05-30 2013-12-05 Robert Bosch Gmbh Kühl- und Abschirmvorrichtung für eine Einspritzvorrichtung

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EP1490160A1 (fr) * 2002-04-03 2004-12-29 Cleaire Advanced Emission Controls, LLC. Porte-injecteur refroidi a l'aide d'un fluide
DE102004056791B4 (de) * 2004-11-24 2007-04-19 J. Eberspächer GmbH & Co. KG Abgasanlage
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Publication number Priority date Publication date Assignee Title
US20100320285A1 (en) * 2006-12-28 2010-12-23 Rainer Haeberer Scr-injection unit
EP2105592A1 (fr) * 2008-03-28 2009-09-30 Magneti Marelli Powertrain S.p.A. Dispositif de montage pour un injecteur dans un système d'échappement de moteur à combustion interne
DE102009054654A1 (de) * 2009-12-15 2011-06-16 Robert Bosch Gmbh Dosiermodul für ein Abgasnachbehandlungssystem eines Kraftfahrzeugs
DE102010030920A1 (de) * 2010-07-05 2012-01-05 Robert Bosch Gmbh Ventil für ein flüssiges Medium
DE102011081145A1 (de) * 2011-08-17 2013-02-21 Robert Bosch Gmbh Vorrichtung zum Befestigen eines Injektors an einem Abgasstrang
EP2664760A1 (fr) * 2012-05-15 2013-11-20 Toyota Jidosha Kabushiki Kaisha Structure de dissipation de chaleur d'une valve d'injection
DE102012209106A1 (de) * 2012-05-30 2013-12-05 Robert Bosch Gmbh Kühl- und Abschirmvorrichtung für eine Einspritzvorrichtung

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