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Dynamics simulation studies on the electric city car with an electromechanical differential and the rear wheels drive

Kozłowski M., Choromański W.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2013

Vol. 61, nr 3

661--673

Here we present one of the more complex models for studying the stability of driving an electric car with electromechanical differential systems. The purpose of simulation is to choose a structure of the control system for a velocity control on driven wheels (an algorithm of a differential) most appropriate for the driver. This type of goal is particularly important in the case of a disabled driver sitting in a wheelchair. The modeling takes into account both the mechanical and electric structure of the vehicle, and finally the human element - a simple model of human impact on the steer by a wire system. Modeling and simulation have used MBS package (SimMechanics). The results of the simulation have showed the best algorithms of an electromechanical differential for the velocity control of rear drive wheels: with setting a velocity difference or with an average velocity controller in the point A of the centre of a car front axle.

Design studies for a city car under aerodynamic aspects

Bechthold F., Beck K., Vogel F., Knorsch T., Schwan A., Münch K.

Zeszyty Naukowe Instytutu Pojazdów / Politechnika Warszawska

2008

z. 5/72

165--170

The student research project describes the definition of specifications for a “City Car”. It will demonstrate the requirements for the power drive as well as for the space saving concept. A first conceptual design has been realized and a model was produced for wind tunnel test in the laboratory for thermo- and fluid dynamics of the Collogne University of Applied Sciences. During the several wind tunnel tests the model was improved concerning aerodynamic aspects. The result will be represented and discussed. The challenge to find a good aerodynamic design for a short City Car will be demonstrated and one possible result will be pointed out.