ADAPTIVE STRATEGY TO CONTROL INTERNAL COMBUSTION ENGINE

摘要

47 This specification discloses a method for adaptively controlling engine calibration control values of a spark ignited automobile internal combustion engine using exhaust gas recirculation (EGR). The strategy includes the steps of (1) predicting a driving pattern based on analysis of recent past driving patterns and (2) selecting engine control values appropriate for the predicted driving pattern and a desired emission constraint. The adaptive strategy adjusts spark timing and magnitude of EGR as a function of engine energy usage per distance travelled while maintaining feedgas emissions at a constant level over a wide variety of driving patterns including urban, suburban and highway. A plurality of driving cycle segments are analyzed to generate a table of engine calibration control values for the adaptive spark and EGR control strategy, This adaptive strategy has fuel consumption characteristics which are most advantageous at the most constrained feedgas levels. Drivability can be enhanced because of the greater calibration flexibility inherent to the adaptive technique.