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The electrification of the powertrain is one of the best solutions in the quest for obtaining emissions within the even more narrow limits imposed by legislation, with no penalty to the dynamic performances of the vehicle. This article describes a study regarding the possibilities of hybridization of a road vehicle. Based on real life situations, the custom driving cycles have been defined by means of GPS tracking. These driving patterns were further used in a simulation environment to test various configurations of classical and hybrid powertrains. The performances of the vehicle before and after hybridization were compared pursuing the change in emissions and fuel consumption.

TThe efficiency of the turbochargers is not satisfactory while the supercharged engine is working at low speeds. The dual supercharging can represent a solution to improve the supercharging process efficiency of the turbochargers. Due to the different functioning principles of the turbochargers and the pressure wave superchargers, this compressors are not having the same efficiency when the engines is running at a certain speed. The pressure wave superchargers can operate with a satisfactory efficiency at low-medium engine speeds. For this reason the dual supercharging with turbocharger-pressure wave supercharger is making the supercharging processes applied on engines more efficient. The two supercharging compressors are compressing the intake air by using a part of the exhaust gases energy. Due to the pressure wave supercharger rotor is having only gas distribution role, the power needed to drive it is reduced. The driving of the rotor can be realized by the crankshaft or by an electric motor.

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