/ 28 ELECTRIFICATION/HYBRIDIZATION Wolfgang Steiger, Otmar Bitsche, Uwe Dieter Grebe, Kazuaki Takizawa, Paolo Emanuele Ferrero, Kazuaki Takizawa Combustion Engine and Electric Drive – Partners or Competitors in the Powertrain of the Future? department of the Volkswagen Group, Prof. Dr.-Ing. Wolfgang Steiger, presented the plug-inhybrid drive concept twinDRIVE®, a concept for the electrification of drives that “combines the idea of purely electric short-distance mobility with the usual long-distance mobility of a combustion engine on the basis of liquid fuels. This drive concept is an important step towards more powerful electrification of the powertrain while reducing the demands on combustion engine and transmission at the same time”, Prof. Steiger said. The question as to whether combustion engine and e-drive would be “Partners or competitors in the powertrain of the future” was answered by Dipl.-Ing. Otmar Bitsche, Director Hybrid Integration and Testing at Daimler AG as follows: “The modular design of hybrid-specific components, such as start/stop systems, integrated electric motors, power electronics, scalable battery systems and auxiliary units and their skillful combination make various degrees of hybridization possible. Mercedes-Benz has standardized the package space for hybrid components in all powertrains and vehicle classes and has thus paved the way for large-scale hybridization that is still distinct for each model series. The scalability and combination of various systems makes a wide range from start/stop vehicles through to pure e-cars possible.” Dr. Frank Beste (AVL) introduced the “AVL Pure Range Extender”, a compact combination of rotary piston engine (Wankel) and generator. The innovative AVL range extender is an enabler for e-vehicles as the battery size can be reduced, producing a positive impact on the cost of e-vehicles. Dr. Günter Fraidl (also from AVL) clarified the “Impact of electrification on the combustion engine”. 2009 Put rather simply, the issue of the 2009 “Engine & Environment” conference could be summarized as: Will the combustion engine continue to play the central role in the powertrain or will it be downgraded to the role of an “emergency power supply” in e-vehicles? The expert contributions included presentations by representatives of the mineral oil and electricity industry (Dr. Walter Böhme, ÖMV AG and Dr. Marcus Groll, RWE AG), an input from motivational researcher Dr. Helene Karmasin on the “Decision for alternative drives” and the presentation of many variants of electrified drive solutions. About one year before the market launch of the Chevrolet Volt and Opel Ampera, Prof. Dr. Uwe Dieter Grebe (Executive Director Global Advanced Engineering GM Powertrain, since September 2012 Executive Vice-President at AVL) introduced the “GM Voltec” electric drive system as the basis of the two volume solutions to come. “Volt and Ampera are able to link up to electro-traction, as the generator carried by the vehicle uses the traditional infrastructure of the liquid fuels”, Prof. Grebe said. The Director of Future Technologies within the External Relations Top: Prof. Dr. Uwe Dieter Grebe presented the “GM Voltec” drive system. Bottom: The AVL Pure Range Extender based on a smooth-running Wankel engine.
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