WO2012097856A1 - Système de réservoir d'agent de réduction destiné à un système d'échappement rcs - Google Patents

Système de réservoir d'agent de réduction destiné à un système d'échappement rcs Download PDF

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Publication number
WO2012097856A1
WO2012097856A1 PCT/EP2011/006572 EP2011006572W WO2012097856A1 WO 2012097856 A1 WO2012097856 A1 WO 2012097856A1 EP 2011006572 W EP2011006572 W EP 2011006572W WO 2012097856 A1 WO2012097856 A1 WO 2012097856A1
Authority
WO
WIPO (PCT)
Prior art keywords
reducing agent
line
supply system
filling line
tank
Prior art date
Application number
PCT/EP2011/006572
Other languages
German (de)
English (en)
Inventor
Anton Kraus
Original Assignee
Volkswagen Aktiengesellschaft
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 Volkswagen Aktiengesellschaft filed Critical Volkswagen Aktiengesellschaft
Publication of WO2012097856A1 publication Critical patent/WO2012097856A1/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
    • 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
    • F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
    • F01N2610/1413—Inlet and filling arrangements therefore
    • 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
    • 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

Definitions

  • the invention relates to a reducing agent supply system for receiving eipes liquid
  • Reducing agent in particular an aqueous urea solution, for a working on the principle of selective catalytic reduction (SCR for selective catalytic reduction) SCR exhaust system.
  • the invention further relates to an SCR exhaust system having the reducing agent supply system and to a vehicle which is equipped with such an SCR exhaust system.
  • a motor measure to reduce the ⁇ - raw emissions in the exhaust gas is the exhaust gas recirculation, in which a part of the exhaust gas of the internal combustion engine is returned to the combustion air, whereby the combustion temperatures are lowered and thus the ⁇ -generation is reduced.
  • a known ⁇ -exhaust aftertreatment provides for the use of discontinuously operated ⁇ -storage catalytic converters, which store nitrogen oxides in the form of nitrates in lean operation (at ⁇ > 1) and at short intervals with a rich
  • Exhaust gas atmosphere ( ⁇ ⁇ 1) desorb the stored nitrogen oxides and reduce in the presence of the present in the rich exhaust gas reducing agent HC and H 2 to nitrogen N 2 .
  • SCR selective catalytic reduction
  • Nitrogen oxides of the exhaust gas into nitrogen and water converts.
  • the ammonia can be added in gaseous form or as aqueous ammonia solution to the exhaust gas stream.
  • an NH 3 -release precursor compound is often used, from the ammonia in the way the thermolysis and hydrolysis is obtained.
  • the currently most common precursor compound for ammonia is urea, which may be in the form of solid urea pellets or an aqueous
  • Urea solution is used. Often, a 32.5% by weight aqueous urea solution having a relatively low freezing point at about -11 ° C.
  • Reducing agent solutions for reducing agent containers are provided, which are refueled via a filling line. If after refueling with reducing agent part of the amount of fluid filled in the filling line remains, it can be cold
  • the frozen reducing agent can clog the filling line, which hinders further refilling, or possibly even damage the filling line by ice pressure.
  • a fuel system for a motor vehicle which has, in addition to a fuel tank, a further tank for a reducing agent.
  • a simultaneous refueling is provided with both the fuel and with the reducing agent.
  • the system has an automatic fuel cut-off device that stops the intake of the fuel when the fuel tank is filled to a certain level and stops the intake of the reducing agent when the fuel tank stops
  • Reductant tank is filled to a certain level.
  • Deployment device is realized by two combination vent valves, the
  • the invention is based on the object, a concept for a
  • Reductant supply system for receiving liquid reducing agent or reducing agent solutions for SCR exhaust systems to provide, in which the problems described above are overcome due to frozen in the filling line reducing agent.
  • a reducing agent supply system for receiving a liquid reducing agent or a reducing agent solution for an SCR exhaust system.
  • the term "reducing agent” also means a precursor compound which releases the actual reducing agent (in particular ammonia NH 3 ) through further process steps.
  • Reducing agent also solutions of urea or ammonia in a suitable solvent, especially water.
  • the reducing agent supply system comprises a reducing agent container for receiving a liquid reducing agent or its solution, a filling line whose first end opens into the reducing agent container and whose second end ends above a maximum filling level of the reducing agent container and can be closed with a tank closure, a first venting line, the one from upper section of the
  • Reductant container branches off and opens above the maximum level of the reducing agent container in the filling line, and a second vent line, the first end in the reducing agent container with a certain length, projects and its second end above a maximum filling level of the reducing agent container opens into the filling line.
  • Filling line is provided, which is set up to open the first vent line in closed with the tank cap filling line and to close the first vent line with open filling line.
  • the essence of the invention is that on the switching valve, which is mechanically actuated by the fuel cap, a distinction between the modes refueling and driving and switching is.
  • this has at least one venting valve and / or ventilation valve, which can be arranged in particular in the tank cap and / or in the region of the second end of the filling above the mouths of the first and the second Entlcommunungsleituhg.
  • the ventilation function of the valve ensures that the system is not inadmissibly high
  • Negative pressure arises as a result of removal of the reducing agent, which could damage the system and in particular the reducing agent tank. If the valve is also equipped with a venting function, this ensures that there is no impermissible overpressure arises in the system, for example, due to a rise in temperature and / or due to a drop in the atmospheric pressure outside the reducing agent tank.
  • a valve piston is provided in a preferred embodiment of the reducing agent supply system according to the invention in the switching valve, which is movable between an open position and a closed position.
  • a spring is arranged in the reducing agent supply system according to the invention in the switching valve, which presses the valve piston in the closed position. This ensures that the first breather line for the fueling mode is closed.
  • the ventilation can take place via the first vent line, brings in a preferred embodiment of the invention
  • Reduktionsmittelvorratssystems the tank cap after closing the filling line the valve piston against the spring force of the spring in the open position.
  • valve piston is substantially parallel to the
  • valve piston Longitudinal direction of the filling arranged and displaceable.
  • the valve piston may be arranged in its closed position substantially orthogonal to the longitudinal direction of the filling line and be tiltable from this position into its open position.
  • Another aspect of the present invention relates to an SCR catalyst system having at least one SCR catalyst and a reductant storage and delivery system having a reductant supply system according to the present invention.
  • the invention further relates to a vehicle with such an SCR catalyst system.
  • Figure 1 is a schematic representation of an exhaust system with a
  • Figure 2 is a schematic representation of an inventive
  • FIG. 3 is an enlarged sectional view of a switching valve according to the invention according to a first embodiment of the invention in its open position
  • FIG. 4 is an enlarged sectional view of the switching valve according to the invention
  • FIG. 3 in its closed position
  • FIG. 5 is an enlarged sectional view of a switching valve according to the invention according to a second embodiment of the invention in its open position
  • FIG. 6 is an enlarged sectional view of the switching valve according to the invention
  • FIG. 1 shows a motor vehicle designated overall by 10, of which only an internal combustion engine 12 with an exhaust system 14 connected thereto is shown here.
  • the internal combustion engine 12 is an internal combustion engine running at least temporarily or permanently lean, for example a diesel engine. In the example shown, he has an injection system 16 which injects fuel directly into cylinder 18 of internal combustion engine 12. Likewise, however, the internal combustion engine 12 can work with premixing.
  • the combustion air is supplied to the internal combustion engine 12 via an intake passage 20 and may optionally be regulatable via a throttle device 22, for example a throttle valve.
  • An exhaust gas of the internal combustion engine 12 is introduced into an exhaust passage 24 of the exhaust system 14, in which a first catalyst 26 may be disposed at a position near the engine, for example, an oxidation or 3-way catalyst.
  • the exhaust system 14 further includes a on the principle of selective catalytic
  • Reduction operating SCR catalyst system 28 which has an SCR catalyst 30, namely a ⁇ -reduction catalyst, and a reducing agent storage and supply system 32.
  • the reductant storage and delivery system 32 includes a Reductant supply system 34, which includes a reducing agent container 36 in which a liquid reducing agent or a liquid reducing agent solution (im
  • reducing agent 38 is stored.
  • the reducing agent 38 is supplied via a delivery line 40 by means of a pump 42 to a metering device 44, which is designed in particular as a metering valve.
  • the metering device 44 performs this
  • the reducing agent fed to the SCR catalytic converter 30 is, in particular, ammonia NH 3 l, which is in the form of a NH 3- releasing or releasing agent
  • Precursor compound is stored and metered.
  • an aqueous ammonia solution or an aqueous urea solution is suitable as such a precursor compound.
  • a heatable hydrolysis device 46 is arranged in the exhaust gas channel 24 downstream of the metering device 44.
  • the reducing agent 38 is an aqueous urea solution without restricting the invention to these.
  • Signal line operating data of the internal combustion engine 12 such as engine speed, engine load, engine temperature and the like. Depending on this data controls
  • Engine control unit 48 by means of stored maps various operating parameters of the internal combustion engine 12. In particular, the injection system 16 is driven so that a predetermined amount of fuel per stroke is injected into the cylinder 18.
  • Throttle device 22 varies.
  • a ⁇ concentration of the exhaust gas is detected by means of a not shown, arranged in the exhaust duct 24 ⁇ sensor or characteristic map determined in dependence on the operating data of the engine 12.
  • the engine control unit 48 determines based on the ⁇ concentration a required, the
  • Exhaust gas to be supplied reducing agent amount controls the pump 42 as needed so that the predetermined amount of reducing agent is metered into the exhaust passage 24.
  • control of the SCR exhaust system is performed by the engine control unit 48
  • a separate control device may be provided for this purpose.
  • the metered amount of reducing agent can also over
  • FIG. 1 shows no elements of the reducing agent supply system 34 that are required for refueling.
  • the reducing agent supply system 34 will be explained in greater detail below with reference to FIG. 2, in which, however, the illustration of the delivery line, pump and metering device is dispensed with.
  • the reducing agent supply system 34 with the reducing agent tank 36 for the reducing agent 38 has a filling line 50, whose first end 52 at least partially protrudes into the reducing agent tank 36 and whose. second end 54 ends above the maximum filling level of the reducing agent tank 36.
  • the second end 54 may in particular be arranged at a location of the vehicle accessible to a user.
  • the filling line 50 can be closed by means of a tank closure 56, as shown for example in the illustration of FIG.
  • a ventilation of the internal combustion engine 1 ' 2 To during the operation of the internal combustion engine 1 ' 2, a ventilation of the
  • Reductant container 36 is required, which is required due to the removal of reducing agent 38, is preferably provided in the tank cap 56, a vent valve 58 or a combined venting valve, which is known per se and therefore not further described here.
  • a first vent line 60 branches off from an upper side of the reducing agent tank 36 and opens above the maximum level of the Reduktionsffenbeh age 36 in the filling line 50, for example in the vicinity of the second end 54 and the
  • Tank closure 56 In the area of the mouth of the first vent line 60 in the
  • an inventive switching valve 62 is arranged, which is indicated only schematically in the illustration of Figure 2. Reference to the figures 3 to 6 two embodiments of the switching valve 62 according to the invention will be described in more detail below.
  • a second vent line 64 is provided such that a first end 66 projects into the reducing agent tank 36 having a certain length.
  • the first end 66 of the second vent line 64 thus serves as a dip tube, so that it is filled in the
  • Dip reducing agent can.
  • a second end 68 of the second vent line 64 also opens above the maximum filling level of the reducing agent tank 36 in the filling line 50, for example, slightly lower than the mouth. the first vent line 60.
  • the diameters of the first and second vent lines 60, 64 are less than the diameter of the fill line 50, although not shown in FIG. or quick coupling systems may be provided for assembly reasons.
  • the tank cap 56 When refueling the reducing agent tank 36, the tank cap 56 is removed and the filling line 50 is open. According to the invention the tank cap 56 is with the
  • Switching valve 62 in such a mechanically operative connection that when removing the
  • Tank closure 56, the switching valve 62, the first vent line 60 closes.
  • no venting of the reducing agent tank 36 take place and the first vent line 60 forms a dead volume.
  • Reductant container 36 in which increases in the sequence, the level of the reducing agent 38.
  • the venting of the reducing agent tank 36 takes place via the second
  • Venting line 64 instead, through which the compressed from the reducing agent tank 36 out air flows to the mouth in the filling line 50 and can escape from there via the filling line 50 from the reducing agent supply system 34.
  • the reducing agent 38 closes this vent path.
  • the level now rises mainly in the fill line 50 and in the second vent line 64, which form a system of communicating tubes.
  • the air above the reducing agent 38 in the reducing agent tank 36 is compressible, so that the level of the reducing agent 38 in the reducing agent tank 36 increases somewhat, but this increase is significantly lower than the increase in the level in the filling line 50 and the second vent line 64th ,
  • Reducing agent 38 in the reducing agent tank 36, the filling line 50 and the second vent line 64 have the same filling level.
  • the filling line 50 and the second vent line 64 are now outside the reducing agent tank 36 no longer filled with reducing agent 38, which could freeze depending on a cold environment.
  • Switching valve 62 shown and described in more detail.
  • The. Switching valve 62 is located in the region of the mouth of the first vent line 60 in the second, upper end 54 of the filling line 50, which - as shown in Figure 3 - is closed by the tank closure 56.
  • the Tänkver gleich 56 can be connected by means of a suitable threaded connection 70 with the filling line 50 and sealed fluid-tight.
  • the switching valve 62 has a valve piston 72 which is substantially parallel to
  • the TänkverInstitut 56 presses the valve piston 72 against a suitable spring 74 which is supported on a housing wall of the switching valve 62, so that an opening located in the valve piston 72 opening 76, the first vent line 60 and connects to the filling line 50.
  • the spring 74 may be a coil spring or other suitable spring as shown.
  • the venting is indicated in the figure 3 by the whistle 78.
  • FIG. 4 shows the switching valve 62 without the dancer closure 56, that is to say with the filling line 50 open. In this state ready for refueling, the spring 74 presses the button
  • Valve piston 72 to the outside, so that the opening 76 in the valve piston 72 leaves the region of the first vent line 60 and this is thus closed by the valve piston 72.
  • the valve piston 72 is sealed with respect to the first vent line 60 with suitable seals 80, such as O-rings.
  • a valve piston 72' is arranged substantially orthogonal to the longitudinal direction of the switching valve 62 '.
  • the valve piston 72 ' In the state with the second end 54 of the filling line 50 closed by the dancer closure 56-as shown in FIG. 5, the valve piston 72 'is tilted out of the vertical position by means of the tank closure 56 and is located in the region of the head of the valve piston 72'. a vent for the vent via the first vent line 60 free.
  • a projection 82 is provided on the tank closure 56, which protrudes into the interior of the second end 54 of the filling line 50 in order to press the valve piston into the open position or to tilt it.
  • the possible venting is indicated by the arrow 76 in FIG.
  • FIG. 6 shows the switching valve 62 'in the state ready for refueling, ie the tank cap 56 has been removed.
  • the valve piston 74' is pressed against a housing wall of the switching valve 62 'and closes an opening provided there and the . Flow path for venting.

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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 réservoir d'agent de réduction (34) destiné à recevoir un agent de réduction liquide ou une solution d'agent de réduction (38), destiné à un système d'échappement RCS comprenant un récipient d'agent de réduction (36) destiné à recevoir un agent de réduction liquide ou une solution de ce dernier (38), une conduite de remplissage (50) dont la première extrémité (52) débouche dans le récipient d'agent de réduction (36), sa deuxième extrémité (54) se terminant en-dessus du niveau de remplissage maximal du récipient d'agent de réduction (36) et pouvant être fermée au moyen d'un bouchon de réservoir (56), une première conduite de sortie d'air (60) bifurquant à partir d'une partie supérieure du récipient d'agent de réduction (35) et débouchant au-dessus du niveau de remplissage maximal du récipient d'agent de réduction (36) dans la conduite de remplissage (50), et une deuxième conduite de sortie d'air (64) dont la première extrémité (66) fait saillie de façon à se trouver sur une certaine longueur dans le récipient d'agent de réduction (36) et dont la deuxième extrémité (68) débouche, au-dessus du niveau de remplissage maximal du récipient d'agent de réduction (36), dans la conduite de remplissage (5.0). Afin d'assurer un fonctionnement et un remplissage fiables, une vanne de commutation (62) est disposée, selon l'invention, dans la zone où la première conduite de sortie d'air (60) débouche dans la conduite de remplissage (50), permettant ainsi d'ouvrir la première conduite de sortie d'air (60) lorsque la conduite de remplissage (50) est fermée et de fermer la première conduite de sortie d'air (60) lorsque la conduite de remplissage (50) ouverte.
PCT/EP2011/006572 2011-01-22 2011-12-27 Système de réservoir d'agent de réduction destiné à un système d'échappement rcs WO2012097856A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011009216.1A DE102011009216B4 (de) 2011-01-22 2011-01-22 Reduktionsmittelvorratssystem für eine SCR-Abgasanlage
DE102011009216.1 2011-01-22

Publications (1)

Publication Number Publication Date
WO2012097856A1 true WO2012097856A1 (fr) 2012-07-26

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Country Link
DE (1) DE102011009216B4 (fr)
WO (1) WO2012097856A1 (fr)

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Publication number Priority date Publication date Assignee Title
EP3859129B1 (fr) * 2018-09-29 2022-12-21 Weichai Power Co., Ltd. Réservoir d'urée pour système de post-traitement de rcs, et son bouchon de réservoir

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DE2743490A1 (de) * 1977-09-28 1979-04-05 Volkswagenwerk Ag Tankanordnung, insbesondere kraftstoff-tankanordnung fuer ein kraftfahrzeug
DE3205782A1 (de) * 1982-02-18 1983-08-25 Volkswagenwerk Ag, 3180 Wolfsburg Tankanordnung, insbesondere kraftstoff-tankanordnung fuer ein kraftfahrzeug
EP0333549A1 (fr) * 1988-03-08 1989-09-20 Paul Journee S.A. Dispositif de mise à l'air libre et de sécurité contre le remplissage excessif pour réservoir
US4874020A (en) * 1987-03-26 1989-10-17 Whitehead Engineered Products, Inc. System for controlling the release of fuel vapors from a vehicle fuel tank
DE10214556A1 (de) 2001-05-17 2002-12-05 Ford Global Tech Inc Kraftstoff- und Reduktionsmittelbetankungssystem

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DE3744175C2 (de) * 1987-12-24 1994-07-14 Audi Ag Entlüftungsvorrichtung für einen Kraftstoffbehälter
AT407386B (de) * 1997-06-06 2001-02-26 Blau Internat Gesmbh Vorrichtung zum steuern der gasströme und flüssigkeitsniveaus in einem orvr-betankungssystem
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Publication number Priority date Publication date Assignee Title
DE2743490A1 (de) * 1977-09-28 1979-04-05 Volkswagenwerk Ag Tankanordnung, insbesondere kraftstoff-tankanordnung fuer ein kraftfahrzeug
DE3205782A1 (de) * 1982-02-18 1983-08-25 Volkswagenwerk Ag, 3180 Wolfsburg Tankanordnung, insbesondere kraftstoff-tankanordnung fuer ein kraftfahrzeug
US4874020A (en) * 1987-03-26 1989-10-17 Whitehead Engineered Products, Inc. System for controlling the release of fuel vapors from a vehicle fuel tank
EP0333549A1 (fr) * 1988-03-08 1989-09-20 Paul Journee S.A. Dispositif de mise à l'air libre et de sécurité contre le remplissage excessif pour réservoir
DE10214556A1 (de) 2001-05-17 2002-12-05 Ford Global Tech Inc Kraftstoff- und Reduktionsmittelbetankungssystem

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DE102011009216A1 (de) 2012-07-26

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