Convex modeling and sizing of electrically supercharged internal combustion engine powertrain

S. Marinkov, N. Murgovski, B. de Jager

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)
194 Downloads (Pure)

Abstract

This paper investigates a concept of an electrically supercharged internal combustion engine powertrain. A supercharger consists of an electric motor and a compressor. It draws its power from an electric energy buffer (e.g., a battery) and helps the engine during short-duration high-power demands. Both the engine and the buffer are sized to reduce the sum of the vehicle operational (fuel) and component (engine and buffer) costs. For this purpose, a convex, driving cycle-based vehicle model is derived, enabling the formulation of an underlying optimization problem as a second order cone program. Such a program can be efficiently solved using dedicated numerical tools (for a given gear selection strategy), which provides not only the optimal engine/buffer sizes but also the optimal vehicle control and state trajectories (e.g., compressor power and buffer energy). Finally, the results obtained from a representative, numerical case study are discussed in detail.
Original languageEnglish
Pages (from-to)4523-4534
JournalIEEE Transactions on Vehicular Technology
Volume65
Issue number6
DOIs
Publication statusPublished - 16 Jun 2016

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