Burner for a Motor Vehicle

A burner (42) for an exhaust gas tract (26) that is flowable through by exhaust gas of an internal combustion engine (12) of a motor vehicle, comprising:

• a combustion chamber (58) in which a mixture comprising air and a liquid fuel is ignitable and combustible;
• an inner swirl chamber (62) that is flowable through by a first part of the air, wherein the inner swirl chamber (62) has a first swirl generation device (115) that causes a turbulent flow of the first part of the air and has a first outflow opening (64) that is flowable through by the first part of the air flowing through the inner swirl chamber (62) and via which the first part of the air is removable from the inner swirl chamber (62);
• an introduction element (66) that is flowable through by the liquid fuel and via which the liquid fuel is introducible into the inner swirl chamber (62), wherein the first outflow opening (64) is flowable through by liquid fuel removed from the introduction element (66);
• an outer swirl chamber (76) that surrounds at least one longitudinal region of the inner swirl chamber (62) in a peripheral direction of the inner swirl chamber (62), wherein the outer swirl chamber (76) is flowable through by a second part of the air, wherein the outer swirl chamber (76) has a second swirl generation device (117) that causes a turbulent flow of the second part of the air and has a second outflow opening (80) that is flowable through by the second part of the air flowing through the outer swirl chamber (76), by liquid fuel flowing through the first outflow opening (64), and by the first part of the air flowing through the inner swirl chamber (62) and the first outflow opening (64), and wherein the first part of the air and the second part of the air and the liquid fuel are introducible into the combustion chamber (58) via the second outflow opening (80);
• a dividing wall (210) that has a longitudinal region (LW) disposed upstream of the first swirl generation device (115) and the second swirl generation device (117) in a flow direction of the first part of the air flowing through the inner swirl chamber (62) and the second part of the air flowing through the outer swirl chamber (76);
• wherein an inner air feed chamber (206) is separated from an outer air feed chamber (208) by the longitudinal region (LW) except for exactly one overflow opening (212) formed in the longitudinal region (LW);
• wherein the inner air feed chamber (206) is assigned to the inner swirl chamber (62) and is disposed upstream of the first swirl generation device (115) and wherein the first part of the air is feedable to the inner swirl chamber (62) via the inner air feed chamber (206);
• wherein the outer air feed chamber (208) is assigned to the outer swirl chamber (76), is disposed upstream of the second swirl generation device (117), is fluidically connected to the inner air feed chamber (206) via the overflow opening (212), and surrounds the inner air feed chamber (206) in a peripheral direction of the inner air feed chamber (206) and wherein the second part of the air is feedable to the outer swirl chamber (76) via the outer air feed chamber (208);
• and
• a feeding conduit (218) that is flowable through by the air and which leads into the outer air feed chamber (208), wherein the air is introducible into the outer air feed chamber (208) via the feeding conduit (218), wherein the first part of the air is transferrable into the inner air feed chamber (206) from the outer feed chamber (208) via the overflow opening (212), and wherein the air introduced into the outer air feed chamber (208) is dividable into the first part of the air and the second part of the air.