Modular modelling and simulation tool for evaluation of powertrain performance

A modelling and simulation tool for evaluation and comparison of powertrain concepts is described. It is built upon an existing modelling and simulati on software package. The tool uses new and powerful modelling techniques fo r dynamic systems. Object and equation orientation and hierarchically struc tured libraries are used to provide a powerful yet flexible instrument. The powertrain is studied as part of a total system consisting of vehicle, dri ver and road. Transient city traffic is focused on. Primary results from si mulations are energy consumption and emissions. Simple modelling examples d emonstrate the advantages of equation-oriented modelling. New kinds of road and driver models are also included. They make prediction of the outcome o f realistically described transportation tasks possible and are useful for evaluating the influence of driver behaviour on energy consumption and emis sions. Examples of model implementation and library structure are presented . The ability of the tool is illustrated with simulations which are compare d with tests.