We present and discuss the Modelica-based development environment currently used by Daimler to develop powertrain control software for passenger cars. Besides well calibrated vehicle models, the environment supports automotive standards such as A2L, MDF, CAN, and XCP to integrate control software and simulated vehicles on Windows PCs.

Starting from an assumed vehicle path on a given road section we derive the formulae for the calculation of an appropriate reference speed profile tabled over road arc length. Together with a speed error feedback we thus emulate what a real driver does while driving and scheduling his actions on throttle and brake pedal. The resulting driver model may be used for automatic speed control in vehicle dynamics simulation. The application addressed here is software in the loop simulation for virtual drivetrain endurance testing at Daimler AG. A prototypical Modelica implementation was made at DLR and tested with a simple longitudinal vehicle dynamics model. Finally, we discuss the experiences with the reference speed profiles made in the industrial practice.

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