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In 2007 Punch Powertrain started the development of a full hybrid powertrain concept based on its CVT. A performance and efficiency analysis proved that a post-configuration offered the best solution. In parallel to the mechanical and electrical development an advanced, Matlab/Simulink® simulation system was established. A robust powertrain strategy was developed and implemented into the simulation system. Results show a potential of 30% to 70% fuel efficiency improvement depending on the cycle (type approval and real-world cycles). A higher saving potential is possible as a plug-in. The fuel efficiency improvement is reached while meeting other important targets. First of all, the powertrain cost premium needs to match the saving. Next to keeping the transmission cost under control the electric drive technology and the batteries are cornerstones of the powertrain development. A dedicated switched reluctance electric motor/generator is developed at a partner.

Within the European project Decade a vehicle level simulation tool was developed for the simulation of fuel consumption and emissions for real traffic transient vehicle operation. The specific task in the project was to include a method for calculating dynamic emissions, and thereby reaching higher accuracy than traditional emission simulation modeling. The final simulation tool, which is called VeTESS (Vehicle Transient Emissions Simulation Software), calculates emissions and fuel consumption on a second-by-second basis for a specific vehicle on a given speed profile. It is based on a detailed calculation of the engine power required to drive a given vehicle over any particular route. This includes the rapidly changing (transient) demands placed on the engine, an area that has proved an obstacle to accurate simulation in the past. This paper describes the approach used to obtain dynamic emission maps, and the validation of the simulation tool based on a large number of measurements.