Due to their technology complexity, Diesel engines require efficient calibration methodologies to tune engine control parameters. Several approaches are proposed based on design of experiments (DoE). Nevertheless most of the methodologies require several steps to optimise hot and cold settings, as well as after treatment system. A new calibration methodology has been set up which allows to optimise simultaneously the cold and hot control maps in steady-state conditions while taking into account after treatment systems efficiency. This method combines local statistical models coming from DoE and global objectives for optimisation. A vehicle with Euro4 Diesel engine without diesel particulate filter (DPF) has been recalibrated with an innovative bio fuel in order to reach Euro5 emission levels with the help of this methodology. Second part of this paper presents a calibration tool, named ICE2, which allows to use this methodology. This tool is engineered in order to satisfy 4 main objectives: propose several approaches according to the user needs, optimise calibration process in terms of duration and quality, provide an easy calibration data management, and help the user to go surely through the calibration tasks without being a maths specialist. The workflow and the main characteristics of the tool are described. Last part of this paper presents and discusses the ongoing developments of the method and of the tool.
New calibration method and tool to minimize emissions on cold-start driving cycle
2012
10 Seiten, 20 Bilder, 3 Tabellen, 5 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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