/ 12 Fuel Consumption and Emissions 2008 The 20th “Engine & Environment” conference was held in 2008, the year AVL celebrated the 60th anniversary of its founding. Since 2003, the conference venue has been the Helmut-List-Halle in Graz. The anniversary conference revolved around the challenge faced by the automotive industry of developing vehicles with low CO2 emissions that will still be affordable and offer driving fun. The range of topics was wide, starting from “Mobility and sustainability – A contradiction” by Dipl.-Ing. Wolfgang Hatz (Volkswagen AG) and ending with “The contribution of the complete vehicle to CO2 reduction” by Dipl.-Ing. Herbert Demel (Magna International Europe AG). The focus was on innovative engine concepts and technologies for CO2 reduction, and several presentations were dedicated to downsizing. In his presentation on “Gasoline DI downsizing: Challenges on the path to an attractive powertrain”, Dipl.-Ing. Dirk Borrmann of Ford-Werke GmbH reached the conclusion that “downsizing as a central means to reduce CO2 emissions can be logically combined with additional thermodynamic features of the combustion system, such as stratified lean part-load operation, and followed by cooled exhaust gas recirculation full-load operation. (...) Downsized engines will no longer be developed as a variant of naturally aspirated engines but as dedicated designs for charged operation.” Hybridization featured prominently at the conference in 2008. Dr. Robert Fischer on behalf of AVL presented the parallel hybrid demo vehicle, the “AVL Turbohybrid” based on a BMW 320i. It combined a 1.6-l gasoline direct injection turbo charged engine with mild hybridization (15 kW electric motor) and was optimized with regard to fuel consumption and drivability. The “AVL Turbohybrid” uses the overboost capability of the turbo engine for additional recharging possibility and can thus reduce the required battery capacity compared to a normally aspirated engine. Compared to a reference powertrain with 2-l gasoline naturally aspirated engine with variable valve control, the “AVL Turbohybrid” reduced fuel consumption by approximately 24 percent (NEDC), while driving performance and subjective drivability proved to be better than in the reference vehicle. Prof. Dr.-Ing. Günter Hohenberg (Darmstadt University of Technology) and Prof. Dr.-Ing. Ferit Küçükay (Braunschweig University of Technology) enlarged on “CO2 potential in customer use by an intelligent HEV control strategy”. They detected the main potential for reduced fuel consumption in the networking of the powertrain “with all the available information from the parameter space given by driver, vehicle and driving environment: “An intelligent, forward-thinking operating strategy anticipates and reacts to changes in driving conditions: the sensors of the driver assistance systems respond to changes or predict them with a high probability based on driving behavior detection. In the NEDC, the CO2 reduction potential of such an intelligent operation strategy can be quantified at 23.6 %.” 120 g CO2/km – What about Driving Fun and Costs? Top: Dipl.-Ing. Wolfgang Hatz, General Representative of Management, Volkswagen Group Bottom: “AVL Turbohybrid” demo vehicle Wolfga ng Hat z, Herbe rt De mel , Dirk Borrmann, Ferit Küçüka y, Yves Dubreil, Wolfga ng Re ik
M&U_25Jahre_E_web
To see the actual publication please follow the link above