Electrical Energy Supply in Future Powertrains – Challenges and Solutions

Authors

Dr. G. Lugert, Dipl.-Ing. R. Knorr, Dipl.-Ing. G. Grassl, Dipl.-Ing. F. Lohrenz, Dr. H. Stocker, Siemens VDO Automotive AG, Regensburg

Year

2004

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 566

Summary

The average electrical energy consumption of vehicles has grown continuously during the last years. A further increase is assumed for the next years (2010 to 2020), despite an electrical energy management already visible. This is mainly caused by additional loads due to increasing needs for comfort, safety and communication. Additional loads are expected around the Powertrain in order to improve the efficiency (CO2 emission) of the Internal Combustion Engine (ICE), mainly triggered by legislation. Somewhat contradictory, the 25. Internationales Wiener Motorensymposium 2004 market is requiring more driving fun in combination with low fuel consumption. It is predictable that the already started activities to control the energy needs of the 14V board net with an intelligent control and power management won't be sufficient in all cases. The integration of a mild or power hybrid into the Powertrain allows to avoid a shortage in electrical energy supply on a midterm base. In a long term (2020 to 2030) we will see improved and synthetic fuels which satisfy all emission regulations. Although still in small number compared to the ICE dominated Powertrains, there will be some Fuel Cell cars in the market providing enough power and energy for the board net loads and eventually the propulsion.

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