Technical Paper
Model-Based Idle Speed Control for a High Performance Engine
2003-03-03
2003-01-0358
A study, for future applications, of a model-based Idle Speed Control (ISC) system for the L535 Lamborghini 6.2L-48 valve V12 gasoline engine is presented in this paper. Main features of the controller are: Real-time auto-adaptation; Synchronization of Throttle Angle (TA) opening with Spark Advance (SA) timing, through model-based Drive-by-Wire (DBW) control strategies; Auto-adaptive management of the absolute pressure levels in the two, completely separated, intake manifolds; Feed-forward compensation for known loads; Integrated Air-to-Fuel Ratio (AFR) control at idle. Design targets are: Idle speed error from the nominal value imperceptible by the driver, considering that this study is for a high performance engine; Emissions reduction; Minimization of the engine speed undershoot (overshoot) when applying (removing) unknown loads.