US 11,988,130 B2
Method for operating an exhaust burner, device for executing such a method, and motor vehicle
Christian Disch, Wimsheim (DE); Max Braunbeck, Lauffen am Neckar (DE); and William Krein, Neckarzimmern (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Jun. 29, 2023, as Appl. No. 18/344,717.
Claims priority of application No. 10 2022 206 801.7 (DE), filed on Jul. 4, 2022.
Prior Publication US 2024/0003279 A1, Jan. 4, 2024
Int. Cl. F01N 3/20 (2006.01); F01N 3/025 (2006.01); F01N 3/22 (2006.01); F01N 9/00 (2006.01)
CPC F01N 3/2033 (2013.01) [F01N 3/025 (2013.01); F01N 3/22 (2013.01); F01N 3/225 (2013.01); F01N 9/00 (2013.01); F01N 3/0256 (2013.01); F01N 2240/14 (2013.01); F01N 2430/06 (2013.01); F01N 2550/14 (2013.01); F01N 2610/03 (2013.01); Y02T 10/12 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for operating an exhaust burner, which is situated in an exhaust system downstream from an internal combustion engine of a motor vehicle, the method comprising:
prior to and during a start phase of the exhaust burner, increasing an air-mass flow supplied to a combustion chamber of the exhaust burner strictly monotonically, between:
a start time in a starting air-mass flow, and
a further time in a further air-mass flow,
 and prior to the further time, fuel being conveyed to the combustion chamber, a fuel-air mixture being produced in the combustion chamber from the fuel and air of the air-mass flow, and the fuel-air mixture is ignited using an ignition device which is continuously hot or produces an ignition spark intermittently.