US 12,416,268 B2
Method for operating an internal combustion engine, and internal combustion engine
Holger Kauss, Wernau (DE); Gabriele Sgroi, Ostfildern (DE); Giovanni Cornetti, Weil der Stadt (DE); Horst Mueller, Sachsenheim (DE); Moritz Hoess, Bietigheim-Bissingen (DE); and Samuel Weinbrenner, Boeblingen (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Appl. No. 18/693,019
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Sep. 2, 2022, PCT No. PCT/EP2022/074497
§ 371(c)(1), (2) Date Apr. 8, 2024,
PCT Pub. No. WO2023/036710, PCT Pub. Date Mar. 16, 2023.
Claims priority of application No. 10 2021 210 001.5 (DE), filed on Sep. 10, 2021.
Prior Publication US 2024/0392732 A1, Nov. 28, 2024
Int. Cl. F02D 41/00 (2006.01); F01N 3/20 (2006.01); F01N 3/36 (2006.01); F02B 37/20 (2006.01)
CPC F02D 41/0007 (2013.01) [F01N 3/2033 (2013.01); F01N 3/36 (2013.01); F02B 37/20 (2013.01); F02D 41/0027 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for operating an internal combustion engine including a combustion chamber, which is connectable to a charge air supply and to a supply for fuel, and including an exhaust gas system, which receives combusted air from the combustion chamber and at least partially supplies the combusted air to an exhaust gas turbocharger, wherein fuel can be introduced into the exhaust gas system via a metering valve between the combustion chamber and the exhaust gas turbocharger, the method comprising the following steps:
supplying charge air and fuel to the combustion chamber of the internal combustion engine, wherein more oxygen is present in the combustion chamber than is consumed during combustion;
igniting an air/fuel mixture in the combustion chamber;
discharging burned-off mixture including exhaust gas from the combustion chamber into the exhaust gas system;
supplying fuel between the combustion chamber and the exhaust gas turbocharger to the exhaust gas flowing from the combustion chamber;
igniting the fuel in the exhaust gas system; and
supplying at least a portion of the exhaust gas to the exhaust gas turbocharger,
wherein fuel is introduced into the exhaust gas only when an air compression power of the exhaust gas turbocharger is not sufficient for a power demand on the internal combustion engine.