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Computer-Aided Optimization of Engine Control Unit Transient Maps
Published September 07, 2004 by CMT in Spain
Event: Thiesel 2004
The introduction of the European Transient Cycle (ETC) in the regulation of the heavy-duty diesel engines makes it necessary to optimize also in transient the NOx/Soot/BSFC trade-offs. This affects, for instance, the Engine Control Unit (ECU) maps controlling the transient behavior of injection timing, pressure, and EGR valve position. This article describes a method consisting first of building a transient model of the engine using recurrent neural networks, and then of using this model for an off-line optimization, on the ETC, of the transient ECU maps. The method was applied on transient response tests at constant speed of a Euro 4 engine with EGR. The model built showed consistent trends, and the optimized map did match the empirical experience on this simple test.