WO2022243159A1 - Purification de gaz d'échappement de démarrage à froid - Google Patents

Purification de gaz d'échappement de démarrage à froid Download PDF

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Publication number
WO2022243159A1
WO2022243159A1 PCT/EP2022/062925 EP2022062925W WO2022243159A1 WO 2022243159 A1 WO2022243159 A1 WO 2022243159A1 EP 2022062925 W EP2022062925 W EP 2022062925W WO 2022243159 A1 WO2022243159 A1 WO 2022243159A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
module
aluminosilicate particles
adsorber
adsorber module
Prior art date
Application number
PCT/EP2022/062925
Other languages
German (de)
English (en)
Inventor
Simone Müller-Hellwig
Hagen SEIFERT
Alexander Krajete
Original Assignee
Audi Ag
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 Audi Ag filed Critical Audi Ag
Priority to EP22729131.7A priority Critical patent/EP4341537A1/fr
Publication of WO2022243159A1 publication Critical patent/WO2022243159A1/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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen oxides
    • 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
    • F01N3/2053—By-passing catalytic reactors, e.g. to prevent overheating
    • 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
    • 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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/30—Arrangements for supply of additional 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/14—Systems for adding secondary air into exhaust

Definitions

  • the invention relates to a method and a device for removing NOx from the exhaust gas of an internal combustion engine during cold start.
  • WO 2019/072973 A1 discloses a method for reducing the nitrogen oxide content and/or the CO content in an exhaust gas of a vehicle, which comprises water vapor and one or more nitrogen oxides and/or CO, in which a particulate hydrophobic aluminosilicate - Zeolite is brought into contact with the exhaust gas at a temperature of at least 20°C and at least part of the nitrogen oxides and/or the CO from the exhaust gas is adsorbed on its surface and/or in its pores.
  • DE 60 130406 T2 discloses a system for cleaning exhaust gases from diesel or gasoline engines, which on average contain an excess of oxygen, in which system a mixture ratio of the engine periodically changes from a lean mixture ratio to a stoichiometric or rich one mixing ratio is set with an l value below 1.2.
  • the system comprises a combination of an oxidation catalyst effective to accelerate the oxidation of at least NO to NO2, a particulate separator and a NOx adsorption catalyst, the order of this combination of the three operational units in the flow direction of the exhaust gas being as follows : a NOx adsorption catalyst, a particulate separator and an oxidation catalyst, and the NOx adsorption catalyst and the particulate separator are arranged in the same structure.
  • the system reduces the levels of hydrocarbons, carbon monoxide, nitrogen oxides and particulates present in the exhaust.
  • DE 102016219301 A1 relates to a method for cleaning exhaust gas generated by an internal combustion engine, in which the exhaust gas generated by the internal combustion engine is routed through an exhaust gas path in which at least one adsorption element is arranged, on which pollutants contained in the exhaust gas, in particular carbon dioxide, are at least partially bound, and in which the at least one adsorption element is regenerated by at least partial desorption of the bound pollutants, and in which pollutants desorbed from the at least one adsorption element are stored in at least one memory during the desorption.
  • the adsorption element has an adsorption layer made of aluminum oxide and/or aluminum silicate.
  • the invention has set itself the task of making devices and methods available with which the high NOx emission rates during the cold start phase of an internal combustion engine can be reduced.
  • the object is achieved according to the invention by a method having the features of claim 1 and a device having the features of claim 8. Configurations and developments of the invention result from the dependent claims, the description and the illustrations.
  • the exhaust gas composition of modern combustion engines is NO-heavy, the NO2 content is very low. While a plethora of materials can remove NO2, adsorptive removal of NO is far more difficult to accomplish.
  • the targeted metering of oxygen or air into the exhaust gas stream makes it possible to reduce NOx emissions during the cold start phase, even in vehicles with high engines.
  • the introduction of oxygen or air into the exhaust line shifts the reaction equilibrium from NO to NO2, which facilitates the absorption of NOx in an adsorber material, since NO2 is bound much more easily than NO.
  • the invention relates to a method for removing NO and/or NOx from an exhaust gas stream of an internal combustion engine during the cold start phase, i. H. preferably in the first 120 to 180 seconds after starting the engine, in which the exhaust gas flow and an oxygen-containing gas flow are simultaneously passed through an adsorber module containing aluminosilicate particles, and NO and/or NOx are oxidized by the oxygen and adsorbed on the aluminosilicate particles.
  • the aluminosilicate particles can be regenerated by heating, i. H. they release the adsorbed nitrogen oxides again and can adsorb nitrogen oxides again after cooling down.
  • the method according to the invention is carried out in a temperature range from -40° C. to 40° C. outside temperature and at a flow rate of at least 60 m 3 /h exhaust gas and the method according to the invention has a space-time yield of at least
  • the total volume of the aluminosilicate particles contained in the adsorber module is 1 to 4 L, e.g. B. 1 to 3 L, in particular 2 to 2.5 L, for example 2.2 L.
  • the ratio of the flow rates of exhaust gas and oxygen-containing gas is from 10:1 to 1:1, for example 5:1 to 3: 1.
  • aluminosilicate particles are used as adsorber material.
  • suitable aluminosilicates are feldspars and zeolites, such as zeolite A, zeolite Y or zeolite ZSM-5.
  • the Zeolite particles have a Si:Al molar ratio in the range from 500:1 to 5:1, for example from 40:1 to 10:1.
  • aluminosilicate particles are used which contain no metals as promoters.
  • the aluminosilicate particles have a bulk density of 650 to 750 kg/m 3 and an average diameter in the range from 0.1 to 0.7 mm, for example 0.15 to 0.6 mm.
  • the aluminosilicate particles can be regenerated by heating in order to release the adsorbed nitrogen oxides and restore the original adsorption capacity.
  • the aluminosilicate particles can be used over a longer period of time and over many cold-start phases of the combustion engine.
  • the aluminosilicate particles are regenerated by passing a hot exhaust gas stream through the adsorber module. No additional oxygen is supplied to the adsorber module during regeneration.
  • the exhaust gas stream leaving the adsorber module is fed to an SCR module.
  • the SCR module carries out a selective catalytic reduction (SCR) of the nitrogen oxides contained in the exhaust gas flow.
  • the exhaust gas flow is routed through the adsorber module intermittently during the cold start phase and/or to regenerate the aluminosilicate particles from time to time.
  • the exhaust gas stream is permanently passed through the adsorber module and the SCR module, but only during the cold start phase is an oxygen-containing gas stream additionally passed through the adsorber module.
  • the invention also relates to a device suitable for carrying out the method according to the invention, which comprises an adsorber module containing aluminosilicate particles arranged in an exhaust system of an internal combustion engine and a module for the selective catalytic reduction of nitrogen oxides (SCR module). Furthermore, the device comprises means for metering an oxygen-containing additional gas into the adsorber module.
  • the adsorber module is positioned in the exhaust system of the internal combustion engine in such a way that the exhaust gas stream flows through the adsorber module at least during the cold start phase.
  • the exhaust gas module is arranged in a bypass line (bypass) of an exhaust gas cleaning device (e.g. three-way catalytic converter, oxidation catalytic converter, reduction catalytic converter (SCR)) downstream of the internal combustion engine and means (e.g. electronically controlled valves) are provided, which direct the exhaust gas through the adsorber module according to the invention only during the cold start phase.
  • an exhaust gas cleaning device e.g. three-way catalytic converter, oxidation catalytic converter, reduction catalytic converter (SCR)
  • SCR reduction catalytic converter
  • the adsorber module is connected upstream of the SCR module in the exhaust system.
  • the exhaust system comprises means for directing an exhaust gas flow selectively through the adsorber module or past it, for example a bypass line provided with valve flaps.
  • the adsorber module is connected upstream of the exhaust gas cleaning device in such a way that the exhaust gas stream flows permanently through the adsorber module according to the invention.
  • the emission control device When the emission control device has reached its operating temperature after the cold start phase, it removes the nitrogen oxides from the exhaust gas flow.
  • the adsorber module is not heated, the working temperature is the climatic ambient temperature. Due to the high reactivity Due to the oxygen and aluminosilicate particle viability, the adsorber module according to the invention is able to remove nitrogen oxides from the exhaust gas stream in a temperature range from -40°C to 40°C outside temperature without external heat supply.
  • the aluminosilicate particles are arranged in an exchangeable cartridge.
  • a replaceable cartridge filled with aluminosilicate particles makes the change much easier.
  • the adsorption capacity of the aluminosilicate particles can decrease, for example due to the deposits of impurities contained in the exhaust gas, so that it cannot be sufficiently restored even through regeneration. If the adsorption capacity of the aluminosilicate particles in the cartridge is permanently exhausted, it is simply exchanged for a new cartridge.
  • the cartridge has a volume in the range from 25 mL to 4,000 L, for example from 2 L to 4 L. This low volume allows miniaturization or a compact design of the cold-start adsorber module.
  • the cartridge is made of metal. In another embodiment, the cartridge is a plastic cartridge. The cartridge can have different shapes. In one embodiment, the cartridge is cylindrical and has a circular cross-section. In another embodiment, the cartridge has an elliptical cross-section. In yet another embodiment, the cartridge is in the form of a prism, such as a quadrangular, pentagonal, hexagonal, or octagonal prism.
  • the cartridge has a perforated base and/or lid. This makes it easier for exhaust gas to flow through the cartridge and also retains the aluminosilicate particles in the cartridge.
  • the perforation can consist of holes or slots, for example. It is important that the diameter of the holes or the width of the slots is smaller than the diameter of the aluminosilicate particles in order to effectively retain them in the cartridge.
  • the device according to the invention comprises means for metering an additional gas containing oxygen into the adsorber module.
  • these means include a dosing line that opens into the adsorber module and means for gas dosing such as valves, reducing valves or compressors.
  • these means comprise a dosing line which opens into the exhaust line at the entrance of the adsorber module and means for gas dosing.
  • the oxygen-containing makeup gas is pure oxygen.
  • the oxygen-containing supplemental gas is compressed air.
  • the oxygen-containing supplemental gas is ambient air, optionally in compressed form.
  • the implementation in the vehicle can take place, for example, as follows:
  • the adsorber module is positioned in the exhaust gas flow in front of the SCR module.
  • the cold exhaust gas (when restarting) is passed through the adsorber module for a few seconds and at the same time an oxygen-containing gas flow (pure oxygen, compressed air or ambient air) is passed through the adsorber module until the temperatures in the existing exhaust gas catalytic converter system are sufficient for this can perform its function.
  • the exhaust jet can be routed accordingly via a flap control so that only cold exhaust gas is routed through the adsorber module.
  • the loaded material can be regenerated on-board by passing sufficiently hot exhaust gas through the adsorber module. This stream should be cleaned via the SCR system.
  • the adsorber material can be loaded and unloaded very frequently.
  • a replacement cartridge can be used, which may be replaced at service intervals.
  • Adsorbed on the aluminosilicate particles Nitrogen oxides can be desorbed and recycled and z. B. be used as a raw material for the production of nitro compounds.
  • the solution according to the invention makes it possible to reduce NOx emissions from internal combustion engines during cold starts under extreme flow conditions with space-time yields of at least 30,000 Ir 1 under real conditions (RDE, real drive emissions).
  • RDE real drive emissions
  • With only 2.2 L of adsorber material at least 60 m 3 /h of exhaust gas can be cleaned effectively in a low temperature range (outside temperature - 40 to 40°C).
  • High NOx absorption rates of approx. 50% can also be achieved with an exhaust gas stream in which NO makes up > 99% of the nitrogen oxides, even with an unfavorable combination of high exhaust gas flows under real cold start conditions and without external heat supply.
  • the nitrogen oxide content in the exhaust gas flow during the cold start phase is reduced by up to 67%.
  • FIG. 1 shows an example diagram of the contents of nitrogen oxides and oxygen in an exhaust gas flow leaving an exhaust gas module according to the invention over time
  • FIG. 2 shows an example diagram of the contents of nitrogen oxides and oxygen in an exhaust gas stream at the inlet and at the outlet of an exhaust gas module according to the invention over time.
  • Example 1 In a laboratory test, in a cylindrical plastic cartridge
  • Figure 1 shows the results of the measurement. A maximum NOx uptake rate of 67% was determined; this corresponds to a space-time yield of 14,400 Ir 1 . Virtually no NO is adsorbed without the addition of oxygen.
  • An embodiment of the exhaust module according to the invention was in egg nem field test with a highly motorized (engine power> 350 hp)
  • Example 2 Car tested under real conditions. For this purpose, 2.2 L of the adsorber material from Example 1 were placed in a cylindrical cartridge (16 cm in diameter) and covered with 1.5 L of silica gel to protect against moisture. The raw emission gas of the car's ICE was bundled via 2 tapers on the double exhaust and introduced via 2 inlets into the upper segment of the cartridge, which was perforated at the bottom. In addition, during the cold start-up phase (0 s to 120 s after engine start) 50-100 L/min of pure oxygen from a compressed gas bottle are continuously introduced. With a testo 340 flue gas analyzer (Testo SE & Co.
  • FIG. 2 shows the NOx content of the exhaust gas stream and at the outlet of the exhaust gas module according to the invention over time during the cold start phase (0 s to 130 s after engine start).
  • the NOx absorption rates are in spite of high motorization (> 350 hp) and high volume emissions of at least 60 m 3 / h at about 48%, the space-time yields are high and are in the range of at least 30,000 h 1 .

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

Abstract

L'invention concerne un procédé et un dispositif d'élimination des NO x issus des gaz d'échappement produits par un moteur à combustion interne lors d'un démarrage à froid.
PCT/EP2022/062925 2021-05-20 2022-05-12 Purification de gaz d'échappement de démarrage à froid WO2022243159A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22729131.7A EP4341537A1 (fr) 2021-05-20 2022-05-12 Purification de gaz d'échappement de démarrage à froid

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021113161.8 2021-05-20
DE102021113161.8A DE102021113161A1 (de) 2021-05-20 2021-05-20 Kaltstart-Abgasreinigung

Publications (1)

Publication Number Publication Date
WO2022243159A1 true WO2022243159A1 (fr) 2022-11-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/062925 WO2022243159A1 (fr) 2021-05-20 2022-05-12 Purification de gaz d'échappement de démarrage à froid

Country Status (3)

Country Link
EP (1) EP4341537A1 (fr)
DE (1) DE102021113161A1 (fr)
WO (1) WO2022243159A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5771684A (en) * 1994-08-02 1998-06-30 Corning Incorporated Gas treatment systems
DE19816276A1 (de) * 1998-04-11 1999-10-14 Audi Ag Verfahren zum Betreiben einer Brennkraftmaschine
DE69618357T2 (de) * 1995-01-27 2002-07-11 Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi Verfahren zur Reinigung von Verbrennungsabgasen
DE60130406T2 (de) 2000-07-05 2008-06-12 Ecocat Oy System und Verfahren zur Reinigung von Abgasen
US20170226917A1 (en) * 2016-02-04 2017-08-10 Umicore Ag & Co. Kg System and method for cleaning exhaust gas while avoiding nitrous oxide
DE102016219301A1 (de) 2016-10-05 2018-04-05 Audi Ag Verfahren und Vorrichtung zur Abgasreinigung
WO2019072973A1 (fr) 2017-10-12 2019-04-18 Krajete GmbH Procédé de réduction de la teneur en oxyde(s) d'azote ou en co dans un gaz de combustion ou d'échappement
WO2020069549A1 (fr) * 2018-10-05 2020-04-09 Avl List Gmbh Système de moteur à allumage commandé et procédé à système nsc

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5771684A (en) * 1994-08-02 1998-06-30 Corning Incorporated Gas treatment systems
DE69618357T2 (de) * 1995-01-27 2002-07-11 Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi Verfahren zur Reinigung von Verbrennungsabgasen
DE19816276A1 (de) * 1998-04-11 1999-10-14 Audi Ag Verfahren zum Betreiben einer Brennkraftmaschine
DE60130406T2 (de) 2000-07-05 2008-06-12 Ecocat Oy System und Verfahren zur Reinigung von Abgasen
US20170226917A1 (en) * 2016-02-04 2017-08-10 Umicore Ag & Co. Kg System and method for cleaning exhaust gas while avoiding nitrous oxide
DE102016219301A1 (de) 2016-10-05 2018-04-05 Audi Ag Verfahren und Vorrichtung zur Abgasreinigung
WO2019072973A1 (fr) 2017-10-12 2019-04-18 Krajete GmbH Procédé de réduction de la teneur en oxyde(s) d'azote ou en co dans un gaz de combustion ou d'échappement
WO2020069549A1 (fr) * 2018-10-05 2020-04-09 Avl List Gmbh Système de moteur à allumage commandé et procédé à système nsc

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DE102021113161A1 (de) 2022-11-24
EP4341537A1 (fr) 2024-03-27

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