Exhaust gas aftertreatment system for e.g. Otto engine, has nonthermal plasma discharge device to convert nitrogen monoxide into nitrogen dioxide, and storage device and lean nitrogen oxides trap that are arranged in downstream of device

摘要

The system has a nonthermal plasma discharge device (56) to convert the nitrogen monoxide into nitrogen dioxide, and a nitrogen oxides-storage device and a lean nitrogen oxides trap (LNT) (58) that are arranged in downstream of the discharge device. A precious metal catalyst is arranged downstream of the storage device. A fuel injection valve is arranged in an exhaust that is upstream of the discharge device, and supplies hydrocarbons. Sensors (64, 68, 70, 72) are arranged downstream of the plasma device or storage device or catalyst. An independent claim is also included for a Independent claims are also included for the following: (A) a process of operating an internal combustion engine (B) a process for operating an exhaust gas aftertreatment system coupled with an internal combustion engine (C) a system for diagnosis of operation of the aftertreatment system of an internal combustion engine.