Abstract: This specification discloses a method for adaptively controlling engine calibration control values. 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 traveled 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.

Abstract: This specification discloses a method for generating an engine energy output signal for use by an adaptive strategy in controlling the performance of a spark ignited automobile combustion engine. An estimated future energy output combines the weighted sum of a short term energy output average, a medium term energy output average and a long term energy output average. The adaptive strategy adjusts spark timing and distance of EGR as a function of engine energy usage per distance traveled while maintaining feedgas emissions at a constant level over a wide variety of driving patterns including urban, suburban and highway. This adaptive strategy has advantageous fuel consumption characteristics which are greatest at the most constrained feedgas levels. Drivability can be enhanced because of the greater calibration flexibility inherent to the adaptive technique.

Abstract: This specification discloses a method for generating a table of engine calibration control values for an adaptive spark and EGR control strategy. The adaptive strategy adjusts spark timing and magnitude of EGR as a function of engine energy usage per distance traveled while maintaining feedgas emissions at a constant level over a wide variety of driving patterns including urban, suburban and highway. This adaptive strategy has advantageous fuel consumption characteristics which are greatest at the most constrained feedgas levels. Drivability can be enhanced because of the greater calibration flexibility inherent to the adaptive technique.