Turbo compound systems to recover energy in ICE

249 Abstract— The design of the powertrains for transportation on the road is even more oriented to the emission reduction. Recently, green-house gases commitments added new technological challenges. Energy recovery from exhaust gases has a great potential considering the amount of mechanical or electrical work which could be generated on board. The paper considers the recovery which could be obtained from the exhaust gases expanding them in an additional turbine (turbo compounding). An engine model has been developed and validated thanks to an extensive experimental activity which concerned the F1C Iveco engine equipped with a Variable Geometry Turbine (VGT). Two potential technologies are presented and the recovery has been calculated by the model which behaves as a virtual engine platform. Energy recoverable has been estimated referring to engine operating points which reproduce the NEDC and the ESC13 approval cycle.