US 12,129,780 B2
Combustion engine for a motor vehicle, and motor vehicle
Heiko Beil, Stuttgart (DE); Rene Ernst, Leimersheim (DE); Siegfried Mueller, Ingersheim (DE); and Michael Heinrichsmeyer, Steinheim (DE)
Assigned to Mercedes-Benz Group AG, Stuttgart (DE)
Appl. No. 18/040,520
Filed by Mercedes-Benz Group AG, Stuttgart (DE)
PCT Filed Jul. 20, 2021, PCT No. PCT/EP2021/070202
§ 371(c)(1), (2) Date Feb. 3, 2023,
PCT Pub. No. WO2022/028872, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. 10 2020 004 729.7 (DE), filed on Aug. 5, 2020.
Prior Publication US 2023/0287819 A1, Sep. 14, 2023
Int. Cl. F02M 26/04 (2016.01); F01N 3/20 (2006.01); F02B 37/10 (2006.01); F02B 39/10 (2006.01); F02M 26/06 (2016.01); F02M 26/16 (2016.01)
CPC F01N 3/2013 (2013.01) [F01N 3/2033 (2013.01); F02B 37/10 (2013.01); F02B 39/10 (2013.01); F02M 26/06 (2016.02); F02M 26/16 (2016.02)] 10 Claims
OG exemplary drawing
 
1. A combustion engine (10) for a motor vehicle, comprising:
an output shaft via which the motor vehicle is drivable by the combustion engine (10);
an intake tract (12) through which air to be supplied to a combustion chamber (14) of the combustion engine (10) is flowable;
an exhaust gas tract (16) through which an exhaust gas from the combustion chamber (14) is flowable;
an exhaust gas aftertreatment device (20) disposed in the exhaust gas tract (16) for aftertreating the exhaust gas;
a heating element (18) disposed in the exhaust gas tract (16) upstream of the exhaust gas aftertreatment device (20) for heating a gas flowing through the exhaust gas tract (16);
an electrically assisted exhaust gas turbocharger (22) which has a compressor wheel disposed in the intake tract (12) as a first impeller (24) for compressing air flowing through the intake tract (12), a turbine wheel as a second impeller (26) which is disposed in the exhaust gas tract (16) and which is drivable by the exhaust gas, and an electric machine via which at least one of the first and second impellers (24, 26) is drivable in a heating operation for heating the exhaust gas aftertreatment device (20), wherein in the heating operation, during which combustion processes in the combustion chamber (14) do not take place and the output shaft is at a standstill, air is conveyable as a heating medium by the at least one of the first and second impellers (24, 26) into the exhaust gas tract (16) and is warmable by the heating element (18) in the heating operation to heat the exhaust gas aftertreatment device (20); and
a conduit element (28) which is fluidically connected to the exhaust gas tract (16) at a first connection point (30) disposed downstream of the exhaust gas aftertreatment device (20) and which is fluidically connected to the exhaust gas tract (16) at a second connection point (32) disposed upstream of the heating element (18) and downstream of the combustion chamber (14), wherein at least a portion of the heating medium is returnable from the first connection point (30) to the second connection point (32) and is introducible into the exhaust gas tract (16) at the second connection point (32).