TY - CHAP A1 - Borgeest, Kai A1 - Höfer, Patrik A1 - Seubert, Michael A1 - Stein, Simon T1 - Model Based EGR Control T2 - Proceedings of the Fev Diesel Powertrains 3.0, July 11th & 12th 2017 N2 - Almost stationary control of the correct EGR rate (Exhaust Gas Recirculation) is state of the art. More aggressive emission tests such as WLTP and RDE require a dynamic control of the EGR rate, otherwise a too low EGR rate results in increased NOx emissions, a too high EGR rate in particulate emissions. The difficulty in any EGR control is the missing plant knowledge; the EGR rate is controlled although the present EGR rate is not exactly known. EGR flow sensors are available, but due to additional costs they have not found a broad acceptance. A different approach for high pressure EGR investigated in this paper is a control using a second lambda sensor between EGR and inlet valves. This approach improves the dynamic response, but it might come with costs similar to an EGR flow sensor. Alternatively a model based approach can be used which shows high potential. KW - Exhaust Gas Recirculation KW - Abgasrückführung Y1 - 2017 SP - 64 EP - 66 PB - FEV CY - Aachen ER -