US 12,421,882 B2
Method for introducing heat into at least one component of an exhaust-gas aftertreatment device, software and open-loop or closed-loop control device
Robert Szolak, Freiburg (DE); Anand Bhurabhai Kakadiya, Freiburg (DE); and Paul Beutel, Freiburg (DE)
Assigned to FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V., Munich (DE)
Filed by FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V., Munich (DE)
Filed on May 8, 2023, as Appl. No. 18/313,674.
Application 18/313,674 is a continuation of application No. PCT/EP2021/081092, filed on Nov. 9, 2021.
Claims priority of application No. 102020129497 (DE), filed on Nov. 9, 2020.
Prior Publication US 2023/0332527 A1, Oct. 19, 2023
Int. Cl. F01N 3/20 (2006.01); F01N 11/00 (2006.01)
CPC F01N 3/2013 (2013.01) [F01N 11/005 (2013.01); F01N 11/007 (2013.01); F01N 2560/025 (2013.01); F01N 2560/06 (2013.01); F01N 2560/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for introducing heat into an exhaust-gas aftertreatment device (1) connected to an internal combustion engine (15) which outputs an exhaust-gas flow, the exhaust-gas aftertreatment device (1) comprising one or more of an oxidation catalyst component (11), a particulate filter component (12), and an SCR system component (13), the method comprising:
at least partially reacting a partial flow of the exhaust-gas flow with fuel in a heated catalyst (2) and feeding the reacted partial flow back into the exhaust-gas flow;
controlling the amount of fuel fed to the heated catalyst (2) and/or the partial flow of exhaust-gas flow fed to the heated catalyst (2) based on an exhaust-gas temperature upstream and/or downstream of said one or more components (11, 12, 13) in accordance with at least one heated-catalyst characteristic map (35); and
selecting input variables (351) of the heated-catalyst characteristic map (35) from one or more of:
(i) a driving profile;
(ii) a navigation destination;
(iii) position data; or
(iv) state of charge of at least one battery,
wherein:
the exhaust-gas temperature upstream and/or downstream of said one or more components (11, 12, 13) is indirectly determined from an operating state of the internal combustion engine (15), without direct measurement by temperature sensors.