48 Volt P2 Concept Car with High Tech Gasoline Engine

Autoren

Dipl.-Ing. (FH) Peter Firsching, Dipl.-Ing. (TU) Martin Rauch,
Dipl.-Ing. Univ. Piergiacomo Traversa,
Schaeffler Technologies AG & Co. KG, Herzogenaurach;
Timo Kersting, B.Eng.,
Schaeffler Engineering GmbH, Werdohl;
Dipl.-Ing. (FH) Thomas Eckenfels,
LuK Gmbh & Co. KG, Bühl

Zusammenfassung

The European Commission presented a legislative proposal for the EU fleet average CO₂ emissions for new passenger cars in November 2017. The average CO₂ emissions will probably have to be 15 % lower in 2025 and 30 % lower in 2030, compared to a defined WLTP baseline end of 2021. With the introduction of Euro6dtemp also the pollutant emission limits became more stringent.

Concerning these upcoming CO₂ and pollutant emission, the hybridization of the powertrain will be essential. Low voltage hybrid systems including the 48 Volt hybrid technology become more and more important because they offer an economic entrance into the hybrid vehicle world in combination with a real customer benefit.

Schaeffler developed a 48 Volt hybrid concept car with a high-tech gasoline engine to achieve a defined 2025 CO₂ target based on WLTP. The objective was to achieve in a first step a fuel  consumption reduction by more than 15 % respecting the European
WLTP emission regulation.

This hybrid concept is based on a turbocharged gasoline DI engine with fully variable valve train and a thermal management system in combination with a high-power 48 Volt P2 hybrid module in coaxial configuration. Additional vehicle measures like aerodynamic drag reduction were applied to reduce the vehicle demand energy. The
electrification of the powertrain allows vehicle functions like comfortable electrical maneuvers and inner city electrical driving depending on the size of the battery.

This concept offers the potential to have a very low fuel consumption in combination with a locally emissions free driving capability.

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