System control application for hybrid vehicles

Abstract

The polymorphism and the complexity of hybrid driveline designs lead to extensive definitions of the affiliated operating strategies. With at least two propulsion sources to be controlled and co-ordinated, the execution of these strategies leads to a high degree of automation and control. The paper explains an approach for the design of a central driveline management. A process model is presented. A microcontroller system including a dedicated software environment is developed for strategy implementation. Additional tools support the fast realisation and test of extensive automation and control functions for hybrid and other complex drivelines. Results presented are derived from the realisation of operating strategies previously elaborated in STAR longitudinal simulations for the hybrid concept car ika-Hybrid II, as well as for the Ford Electric Hybrid Vehicle (Ford EHV). Tests confirm the capability of the control system as well as the correlation of simulation and operation on test track and test bench.