Hybrid Models of an Automotive Driveline¤

In this document, two hybrid models of an automotive driveline, di®ering in their levels of abstraction from real system behavior, are proposed. One model is very detailed, involves discrete dynamics with numerous states and its aim is to provide a powerful tool for veri¯-cation. From the latter a reduced{order hybrid model, which is more indicated for synthesis purposes in the design of controllers/observers, is obtained analytically. Both hybrid models have been used with encouraging results within the research activity \Hybrid algorithm de-velopment for the actual engaged gear identi¯cation in engine control application, simulation and experimental data processing " developed by PARADES during the year 2004