| abstract |
Method for operating a hybrid drive (1), in particular a motor vehicle, wherein the hybrid drive (1) at least one electric motor (2) and at least one internal combustion engine (3), with each of which a drive power is provided, and at least one of the internal combustion engine (3) downstream Exhaust after-treatment system (4) comprising at least one SCR catalyst (8) and at least one of the SCR catalyst (8) upstream NO X- intermediate storage catalyst (6), wherein immediately after a cold start of the internal combustion engine (3) in an exhaust gas of the internal combustion engine (3) contained nitrogen oxides of the NO X intermediate storage catalyst (6) and at least partially stored in the NO X intermediate storage catalyst (6), at least until a temperature of the SCR catalyst (8) one for the SCR catalyst (8) characteristic light-off temperature has reached at least, wherein after the temperature of the SCR catalyst (8) the An has reached at least temporarily, the electric motor (2) is used in the generator mode and the internal combustion engine (3) is used for driving the electric motor (2) such that a temperature of the NO X intermediate storage catalyst (6) at least temporarily for the NO X - Caching catalyst (6) characteristic desorption reaches at least as of the cached in the NO X intermediate storage catalyst (6) nitrogen oxides are released from the NO X intermediate storage catalyst (6). |