Feedback control of particulate matter and nitrogen oxide emissions in diesel engines

摘要

The continuing reduction of the emissions of diesel engines has caused an increasing complexity of calibration and expensive aftertreatments of the exhaust gas. These issues have a potential for being relaxed if the NO_x and particulate emissions are integrated into a feedback loop. For this purpose, a novel controller is developed. A model-based observer for the emissions is used to overcome the relatively slow dynamics of the available sensors. Furthermore, the controller includes self-calibration of the EGR. The experimental validation of the control structure shows that different emission strategies are feasible with just a minimal calibration effort.