Convex Modeling and Optimization of a Vehicle Powertrain Equipped with a Generator-Turbine Throttle Unit
Artikel i vetenskaplig tidskrift, 2017

This paper investigates an internal combustion (gasoline) engine throttled by a generator-turbine unit. Apart from throttling, the purpose of this device is to complement the operation of a conventional car alternator and support its downsizing by introducing an additional source of energy for the electric auxiliaries. Its energy recovery potential is examined by employing a novel, convex approach to modeling and optimization of the resulting vehicle powertrain. For a given gear-shifting strategy, the proposed method allows the computation of optimal control trajectories, e.g., the optimal engine fuel, alternator, and turbine power, as well as of optimal design parameters, i.e., the optimal battery, alternator and turbogenerator size. The conducted numerical case study shows that a generator-turbine throttle unit has a potential to reduce the total operational (fuel) and component (battery, alternator, and turbogenerator) costs by typically 2%-6%, depending on factors such as the engine size and the choice of a driving cycle.

fuel economy

energy harvesting


optimal control

mathematical model

design optimization


Convex functions


Sava Marinkov

Technische Universiteit Eindhoven

Nikolce Murgovski

Chalmers, Signaler och system, System- och reglerteknik

Bram de Jager

Technische Universiteit Eindhoven

IEEE Transactions on Control Systems Technology

1063-6536 (ISSN) 15580865 (eISSN)

Vol. 25 4 1264-1277







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