Patent ID: 11939903
Assignee: ROBERT BOSCH GMBH
Field: Environmental technology (Chemistry)
Classification: CPC F  Y | IPC F

Claim 0:
1. A method for operating an exhaust burner with a secondary air system, the exhaust burner being arranged in an exhaust system downstream of a combustion engine of a motor vehicle, the combustion engine being a diesel engine, the method comprising the following steps:
activating an ignition device as a function of a release condition, wherein the ignition device is heated up to a specifiable target temperature, the ignition device being a glow plug;
metering fuel at a first time point into a combustion chamber of the exhaust burner at a specifiable first injection frequency using an injection valve, wherein the combustion chamber is not actively supplied with air, and wherein the fuel is diesel fuel;
setting a first target air-mass flow using the secondary air system at a further, second time point, wherein an air-mass flow is increased strictly monotonically;
controlling an air-fuel ratio to a first target air-fuel ratio as a function of a lambda sensor starting from the second time point, and metering fuel at a specifiable second injection frequency; and
setting a second target air-mass flow at a further, third time point.