Device and method for regenerating a particulate filter arranged in the exhaust section of an internal combustion engine

A method for regenerating a particle filter arranged in an exhaust tract, which method comprises:

• conducting an exhaust-gas flow through at least one NO oxidation catalytic converter for the oxidation of NO upstream of the particle filter;
• conducting an exhaust-gas flow through at least one heating device and to the particle filter, and heating the exhaust-gas flow to a defined temperature in dependence on defined regeneration parameters;
• providing the heating device in parallel, in terms of flow, with the NO oxidation catalytic converter, splitting the exhaust gas flow into a first exhaust-gas flow and a second exhaust gas flow and conducting the first exhaust-gas flow through the NO oxidation catalytic converter and the second exhaust-gas flow through or over the heating device, and merging the first and second exhaust-gas flows downstream of the NO oxidation catalytic converter and the heating device and upstream of the particle filter;
• at least during a regeneration phase causing a defined increase in an exhaust-gas temperature upstream of the particle filter and setting a mass ratio between carbon and nitrogen dioxide contained in the exhaust gas to at least 1:4;
• and
• supplying a predefined quantity of a charge-air-side fresh-air flow and/or a predefined quantity of a charge-air flow branched off downstream of the opening point of an exhaust-gas recirculation line into a charge-air line to the exhaust-gas flow upstream of the heating device when a predefined lambda value is undershot and/or when a predefined oxygen value is undershot.