Control Strategy Study of the Series Sequential Turbocharging Using 1-D Simulation

Abstract

The series sequential turbocharging arrangement is a promising technology to turbocharge downsized diesel engines to higher ratings with combined benefits in transient performance, fuel efficiency and emissions reduction. However, the control of such a complex charging system proves to be problematic. Without a robust control strategy, the potential of series sequential turbocharging will not be fully exploited. Worse still, a badly constructed control strategy could have serious negative impact on the turbocharger/engine system. In this paper, several control strategies of the series sequential turbocharging system were proposed and implemented in simulations.