Method and device of the control of a catalyst for storage of nitrogen oxides (nox))

摘要

Controlling the nitrogen oxide (NOx) storage catalyst of an internal combustion engine comprising an engine control unit and a NOx sensor downstream from the catalyst comprises restricting the lean burn window during the NOx storage phase when minimum criteria for NOx storage are not met. An Independent claim is also included for a device for controlling a nitrogen oxide (NOx) storage catalyst located in the exhaust system of an internal combustion engine, comprising a NOx sensor downstream from the catalyst and an engine control unit connected to the NOx sensor, where the device has means for carrying out the above process.