Optimal Air Path Control during Load Transients on an SI Engine with VGT and VVT
(English)In: IEEE Transactions on Control Systems Technology, ISSN 1063-6536, E-ISSN 1558-0865Article in journal (Other academic) Submitted
In recent years, the aim to reduce fuel consumption has been the main goal forthe automotive industry. Downsizing is a promising way to achieve this whichhas shown success. Downsized, turbocharged engines do however suffer from slowtransient torque response. This slow response is due to the slow dynamics of theturbocharger. This paper investigates the torque response of an si engine with vvtand vvt. Optimal open-loop trajectories for the overlap and the vgt position for afast transient response are found. This optimization is based on a one-dimensionalsimulation model. Based on this optimization, a generic feedback strategy forcontrolling the vgt is found. This strategy is implemented and evaluated on anengine and shows good performance.
IdentifiersURN: urn:nbn:se:kth:diva-102843OAI: oai:DiVA.org:kth-102843DiVA: diva2:557057
QS 20122012-09-262012-09-262012-09-28Bibliographically approved