IP Library › Granted Patent US 12,188,392
Granted Patent B2
US 12,188,392 · App. 18/580,561 · Granted Jan 7, 2025

Exhaust gas system for purifying exhaust gases of gasoline engine

Inventors: Jan Schoenhaber (Darmstadt, DE); Joerg-Michael Richter (Frankfurt, DE); Carolin Braun (Langen, DE); Tim Palm (Ronneburg, DE)
Assignee: UMICORE AG & CO. KG
F01N13/0093F01N3/0828F01N3/101F01N2370/04F01N2570/18
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Quick Facts
Patent No.
US 12,188,392
App. No.
18/580,561
Granted
Jan 7, 2025
Kind
B2
Abstract

The invention is directed to the purification of exhaust gases of an internal combustion engine operated predominantly with a stoichiometric fuel mixture. The exhaust system has in particular 4 purification functions in a particular order. A three-way catalyst (TWC1) near the engine is followed by a gasoline particle filter (GPF) and another three-way catalyst (TWC2) downstream thereof. The system additionally includes an ammonia storage function.

Claims (10)

1. An exhaust gas purification system for purifying exhaust gases of a predominantly stoichiometrically operated internal combustion engine, the system comprising: a TWC1 near to the engine on a flow-through substrate, a GPF attached downstream of the TWC1 as a wall-flow filter, and another TWC2 on a flow-through substrate downstream of the GPF, and the system additionally has materials for temporary storage of ammonia,

wherein the materials for temporary storage of ammonia are arranged on a separate flow-through substrate and the separate flow-through substrate is arranged downstream of the TWC2, and

wherein the separate flow-through substrate with the materials for temporary storage of ammonia accounts for a proportion of 5-30% by volume of the total volume of substrates in the exhaust gas purification system.

2. The system according to claim 1 , wherein an ammonia storage capability is increased to at least 0.25 g of ammonia per L substrate volume by the additional materials.

3. The system according to claim 1 , wherein the materials for temporary storage of ammonia are present in the system in an amount of 50-350 g/L substrate volume.

4. The system according to claim 1 , wherein the materials for temporary storage of ammonia have materials selected from the group consisting of zeolites or zeolite-like materials.

5. The system according to claim 1 , wherein the materials for temporary storage of ammonia also have catalysts for the oxidation of NH 3 to N 2 .

6. The system according to claim 1 , wherein the separate flow-through substrate with the materials for temporary storage of ammonia has a greater washcoat loading in g/L than the GPF.

7. The system according to claim 1 , wherein at least one substrate can be electrically heated.

8. A method for purifying exhaust gases of a predominantly stoichiometrically operated internal combustion engine, the method comprising: passing the exhaust gas through the exhaust gas purification system according to claim 1 .

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 19, 2024
From: SCHOENHABER, JAN; RICHTER, JOERG-MICHAEL; BRAUN, CAROLIN; PALM, TIM
To: UMICORE AG & CO. KG
Reel/Frame 066176/0836 →
Priority Claims (1)
DE 102021118802.4 · Jul 21, 2021 · national
Continuity (1)
Related Publication 20240318588A1 · Sep 26, 2024
References Cited (136)
US 5120695A · Blumrich et al. · 1992 [cited by applicant]
US 6468941B1 · Bortun et al. · 2002 [cited by applicant]
US 6585944B1 · Nunan et al. · 2003 [cited by applicant]
US 6729129B2 · Yamamoto et al. · 2004 [cited by applicant]
US 6938411B2 · Hoffmann et al. · 2005 [cited by applicant]
US 7984609B2 · Döring et al. · 2011 [cited by applicant]
US 8066963B2 · Klingmann et al. · 2011 [cited by applicant]
US 8158551B2 · Verdier et al. · 2012 [cited by applicant]
US 8277880B2 · Sato et al. · 2012 [cited by applicant]
US 8341947B2 · Hepburn et al. · 2013 [cited by applicant]
US 8398943B2 · Döring et al. · 2013 [cited by applicant]
US 8464522B2 · Fujiwara · 2013 [cited by examiner]
US 8617497B2 · Adelmann et al. · 2013 [cited by applicant]
US 8663588B2 · Lindner et al. · 2014 [cited by applicant]
US 8776500B2 · Gonze et al. · 2014 [cited by applicant]
US 9517462B2 · Roesch et al. · 2016 [cited by applicant]
US 9957911B2 · Sczomak et al. · 2018 [cited by applicant]
US 10066576B2 · Gwidt et al. · 2018 [cited by applicant]
US 10072549B2 · Inaguma et al. · 2018 [cited by applicant]
US 10279313B2 · Gabrielsson · 2019 [cited by applicant]
US 10323593B2 · Ball et al. · 2019 [cited by applicant]
US 10413886B2 · Despres et al. · 2019 [cited by applicant]
US 10914217B2 · Joo et al. · 2021 [cited by applicant]
US 11073057B2 · Joo et al. · 2021 [cited by applicant]
US 11179676B2 · Schoenhaber et al. · 2021 [cited by applicant]
US 11185820B2 · Schoenhaber et al. · 2021 [cited by applicant]
US 11220942B2 · Hupfeld et al. · 2022 [cited by applicant]
US 11291952B2 · Schoenhaber et al. · 2022 [cited by applicant]
US 11305269B2 · Deibel et al. · 2022 [cited by applicant]
US 20010006934A1 · Kachi et al. · 2001 [cited by applicant]
US 20040101453A1 · Fujiwara · 2004 [cited by examiner]
US 20050282698A1 · Southward et al. · 2005 [cited by applicant]
US 20060010857A1 · Hu et al. · 2006 [cited by applicant]
US 20090193796A1 · Wei et al. · 2009 [cited by applicant]
US 20100107606A1 · Narayanaswamy et al. · 2010 [cited by applicant]
US 20110072784A1 · Hepburn et al. · 2011 [cited by applicant]
US 20110073088A1 · Hubbard et al. · 2011 [cited by applicant]
US 20110120089A1 · Koch · 2011 [cited by examiner]
US 20110202253A1 · Perry · 2011 [cited by examiner]
US 20110271664A1 · Boorse et al. · 2011 [cited by applicant]
US 20150107228A1 · Klingmann · 2015 [cited by examiner]
US 20150132188A1 · Howard · 2015 [cited by applicant]
US 20150266002A1 · Biberger et al. · 2015 [cited by applicant]
US 20160051931A1 · Ito · 2016 [cited by examiner]
US 20160228852A1 · Biberger · 2016 [cited by examiner]
US 20160245207A1 · Ball · 2016 [cited by examiner]
US 20170014766A1 · Schoenhaber · 2017 [cited by examiner]
US 20170274321A1 · Zheng · 2017 [cited by examiner]
US 20180038252A1 · Yang · 2018 [cited by examiner]
US 20180080357A1 · Jung · 2018 [cited by examiner]
US 20180230882A1 · Ghoniem et al. · 2018 [cited by applicant]
US 20180318763A1 · Biberger et al. · 2018 [cited by applicant]
US 20180347425A1 · Otsuka · 2018 [cited by examiner]
US 20190120109A1 · Clark et al. · 2019 [cited by applicant]
US 20190351393A1 · Nunan et al. · 2019 [cited by applicant]
US 20190351397A1 · Nunan et al. · 2019 [cited by applicant]
US 20190351398A1 · Nunan et al. · 2019 [cited by applicant]
US 20190353067A1 · Moser et al. · 2019 [cited by applicant]
US 20200157995A1 · Paukner et al. · 2020 [cited by applicant]
US 20200378286A1 · Hengst et al. · 2020 [cited by applicant]
US 20210162382A1 · Hengst et al. · 2021 [cited by applicant]
US 20210236976A1 · Foerster et al. · 2021 [cited by applicant]
US 20220168721A1 · Schoenhaber et al. · 2022 [cited by applicant]
US 20220176355A1 · Kucerova et al. · 2022 [cited by applicant]
US 20220176364A1 · Schoenhaber et al. · 2022 [cited by applicant]
DE 10023439A1 · 2001 [cited by applicant]
DE 102010046762A1 · 2011 [cited by applicant]
DE 102013211387A1 · 2013 [cited by applicant]
DE 102017102393A1 · 2017 [cited by applicant]
DE 102016112657A1 · 2018 [cited by applicant]
DE 102018108346A1 · 2019 [cited by applicant]
DE 102019204744A1 · 2020 [cited by applicant]
DE 102019219115A1 · 2021 [cited by applicant]
EP 0324082A1 · 1989 [cited by applicant]
EP 0885650A2 · 1998 [cited by applicant]
EP 1046423A2 · 2000 [cited by applicant]
EP 1541220A1 · 2005 [cited by applicant]
EP 1657410A2 · 2006 [cited by applicant]
EP 1726359A1 · 2006 [cited by applicant]
EP 1876331A2 · 2008 [cited by applicant]
EP 1882832A2 · 2008 [cited by applicant]
EP 1892395A1 · 2008 [cited by applicant]
EP 1921044A2 · 2008 [cited by applicant]
EP 2007682A1 · 2008 [cited by applicant]
EP 2042226A2 · 2009 [cited by applicant]
EP 1974809B1 · 2010 [cited by applicant]
EP 1900416B1 · 2011 [cited by applicant]
EP 3045226A1 · 2016 [cited by applicant]
EP 3247493A1 · 2017 [cited by applicant]
EP 3298252A1 · 2018 [cited by applicant]
EP 3536919A1 · 2019 [cited by applicant]
EP 3595796A1 · 2020 [cited by applicant]
EP 3484602B1 · 2020 [cited by applicant]
EP 3639908A1 · 2020 [cited by applicant]
EP 3639919A1 · 2020 [cited by applicant]
EP 3695902A1 · 2020 [cited by applicant]
EP 3642460B1 · 2021 [cited by applicant]
WO 9535152A1 · 1995 [cited by applicant]
WO 2004076829A1 · 2004 [cited by applicant]
WO 2008000449A2 · 2008 [cited by applicant]
WO 2009012348A1 · 2009 [cited by applicant]
WO 2011110919A1 · 2011 [cited by applicant]
WO 2011131324A1 · 2011 [cited by applicant]
WO 2012135871A1 · 2012 [cited by applicant]
WO 2012175409A1 · 2012 [cited by applicant]
WO 2015121910A1 · 2015 [cited by applicant]
WO 2016057285A1 · 2016 [cited by applicant]
WO 2017082563A1 · 2017 [cited by applicant]
WO 2017153239A1 · 2017 [cited by applicant]
WO 2018069199A1 · 2018 [cited by applicant]
WO 2008106518A2 · 2018 [cited by applicant]
WO 2008106519A1 · 2018 [cited by applicant]
WO 2019121375A1 · 2019 [cited by applicant]
WO 2019121994A1 · 2019 [cited by applicant]
WO 2019121995A1 · 2019 [cited by applicant]
WO 2019134958A1 · 2019 [cited by applicant]
WO 2020058265A1 · 2020 [cited by applicant]
WO 2020069548A1 · 2020 [cited by applicant]
WO 2020200394A1 · 2020 [cited by applicant]
WO 2020200397A1 · 2020 [cited by applicant]
WO 2020200398A1 · 2020 [cited by applicant]
WO 2023001617A1 · 2023 [cited by applicant]
WO 2023001865A1 · 2023 [cited by applicant]
U.S. Appl. No. 18/580,496, Schoenhaber et al., filed Jan. 18, 2024. [cited by applicant]
U.S. Appl. No. 18/580,581, Schoenhaber et al., filed Jan. 18, 2024. [cited by applicant]
Lupescu. Jason, et al. A New Catalyzed HC Trap Technology that Enhances the Conversion of Gasoline Fuel Cold-Start Emissions. SAE Int. J. Fuels Lubr 2018. vol. 11(4), pp. 411-425. [cited by applicant]
International Search Report dated Nov. 3, 2022 for International Patent Application No. PCT/EP2022/070285 (4 pages in German; 3 pages English translation). [cited by applicant]
Written Opinion of the International Searching Authority dated Nov. 3, 2022 for International Patent Application No. PCT/EP2022/070285 (6 pages in German). [cited by applicant]
DIN 66133. Jun. 1993, Bestimmung der Porenvolumenverteilung und der spezifischen Oberfläche von Feststoffen durch Quecksilberintrusionv. [Determination of the pore volume distribution and the specific surface area of so… [cited by applicant]
DIN 66134. Feb. 1998, Bestimmung der Porengrößenverteilung und der spezifischen Oberfläche mesoporöser Feststoffe durch Stickstoffsorption Verfahren nach Barrett, Joyner und Halenda (BJH) [Determination of the pore size… [cited by applicant]
Meier, W.M. Zeolites and zeolite-like materials. Pure and Applied Chemistry. 1986. vol. 58, No. 10, pp. 1323-1328. [cited by applicant]
Notice of Allowance mailed Aug. 20, 2024 for U.S. Appl. No. 18/580,496 (8 pages). [cited by applicant]
Non Final Office Action mailed Aug. 26, 2024 for U.S. Appl. No. 18/580,581 (14 pages). [cited by applicant]
Non Final Office Action mailed Jul. 18, 2024 in U.S. Appl. No. 18/580,496 (12 pages). [cited by applicant]
Translation of the Written Opinion of the International Searching Authority mailed Nov. 3, 2022 for International Patent Application No. PCT/EP2022/070285 (7 pages). [cited by applicant]
International Preliminary Report on Patentability mailed Jan. 18, 2024 for International Patent Application No. PCT/EP2022/070285 (7 pages in German; 8 pages English translation). [cited by applicant]