| Popis: |
To achieve fleet fuel consumption legislation of 95g/km CO2 in 2020, various electrification measures will be introduced, besides engine measures, to reduce the overall energy demand of the vehicle. 48V architecture represents an attractive compromise between the standard 12V system and high voltage hybrid systems. The 48V system offers on the one hand already attractive performance potential for moderate hybridization steps, on the other hand, opportunities open up for the electrification of the internal combustion engine (ICE) and its auxiliaries as well as other vehicle components with high power demand. Current belt starter-generator systems already realise direct recuperation and torque boost functions. Additionally they can support a highly effective electrical supercharging system which is clearly superior to current multi-stage turbocharging concepts, particularly in transient response. With flywheel startergenerator concepts, additional functions open up such as purely electric driving in a limited range, or simplification of the base engine towards the goal of a beltless engine. Demand controlled, electrical auxiliaries are already in series production for the cooling-, vacuum- or air conditioning systems. Additional areas of interest are the oil system and variable elements in the valve train or crank train. |
