METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE AND CORRESPONDING INTERNAL COMBUSTION ENGINE

摘要

The invention relates to a method for operating an internal combustion engine (10), especially for reducing the NOx content of the exhaust gas of said internal combustion engine (10). In a controlled/regulated storage-regeneration operation, in the lean operation (lambda > 1), NOx is stored in the storage catalyst (15) (storage phase) and is regenerated in the rich operation mode (lambda < 1) (regeneration phase). The invention is especially characterized in that the efficiency of the storage-regeneration operation is monitored and, when said efficiency falls below a threshold value (S, fs), the engine is switched from the storage-regeneration operation to normal operation (lambda = 1).