Method for determining lambda error and/or nitrogen oxide error for controlling e.g. exhaust gas recirculation portion for internal combustion engine, involves controlling exhaust gas recirculation portion in response to output signal

摘要

The method involves operating an internal combustion engine including an exhaust gas flow, an exhaust gas recirculation (EGR) flow, and an exhaust gas-nitrogen oxide recoupling value. A nitrogen oxide reference value is determined based on an engine rotational speed value and an engine load value. A nitrogen oxide error value is determined in response to the reference value and the recoupling value. A proportional integral (PI) or proportional integral differential (PID) controller (230) is used based on the error value. An EGR portion is controlled in response to a PI or PID output signal.