Identification Techniques for Control Oriented Models of Internal Combustion Engines

摘要

The use of mathematical models is widespread in the design process of modern internal combustion engines. A driving factor for this trend is the rising complexity of engine systems due to tightening emission limits and increasing demands on fuel efficiency. This chapter focuses on control oriented models for turbocharged diesel engines which were specifically developed for use in an advanced model based control design process. A number of challenges had to be overcome to guarantee stability of these models both in simulation and during identification. The solutions for these issues are presented in this chapter together with an innovative identification approach which performs the calibration of the overall engine model on top of the previously executed identification of individual engine components. Example modeling results are included for a six cylinder commercial diesel engine with EGR and dual stage turbocharging.