US 12,385,424 B2
Internal combustion engine for a motor vehicle, in particular for a car
Dietmar Schroeer, Weissach im Tal (DE)
Assigned to Mercedes-Benz Group AG, Stuttgart (DE)
Appl. No. 18/724,847
Filed by Mercedes-Benz Group AG, Stuttgart (DE)
PCT Filed Jan. 25, 2023, PCT No. PCT/EP2023/051814
§ 371(c)(1), (2) Date Jun. 27, 2024,
PCT Pub. No. WO2023/148065, PCT Pub. Date Aug. 10, 2023.
Claims priority of application No. 10 2022 000 415 (DE), filed on Feb. 3, 2022.
Prior Publication US 2025/0059902 A1, Feb. 20, 2025
Int. Cl. F01N 3/22 (2006.01); F16K 15/00 (2006.01); F15D 1/02 (2006.01); F16K 13/00 (2006.01); F16L 55/027 (2006.01)
CPC F01N 3/22 (2013.01) [F16K 15/00 (2013.01); F15D 1/025 (2013.01); F16K 13/00 (2013.01); F16L 55/02754 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An internal combustion engine (12) of a motor vehicle, comprising:
an exhaust tract (20) through which exhaust gas from the internal combustion engine (12) is flowable; and
a secondary air system (22) which has:
a secondary air conduit (24) through which air as secondary air is flowable in an injection direction (26), wherein the secondary air is introducible into the exhaust tract (20); and
a valve element (10) disposed in the secondary air conduit (24) which has a first flow resistance along the injection direction (26) and a second flow resistance that is greater than the first flow resistance along a backflow direction (28) in an opposite direction to the injection direction (26) such that a backflow in the backflow direction (28) is limitable;
wherein the valve element (10) has a plurality of rotationally symmetrical impact bodies (30) which are disposed consecutively along the injection direction (26) and are connected to one another to form an assembly (32), wherein the valve element (10) and thus the assembly (32) is disposed in a length region (L) of the secondary air conduit (24), wherein the length region (L) is limited by a structural element (14) of the internal combustion engine (12), and wherein the structural element is formed separately from the valve element (10) and separately from the assembly (32);
wherein each of the plurality of rotationally symmetrical impact bodies (30) has a respective region (B1) that widens continuously along the injection direction (26);
wherein a respective second region (B2) of each of the plurality of rotationally symmetrical impact bodies (30) follows the respective region (B1) along the injection direction (26) and wherein the respective second region (B2) tapers continuously along the injection direction (26).