Patent ID: 8086390

Claim:
An engine control system for a vehicle, comprising: a base air per cylinder (APC) module that determines a base APC to reduce first engine pumping losses during a first deceleration fuel cutoff (DFCO) event relative to second engine pumping losses during a second DFCO event, wherein engine airflow actuators are controlled throughout the second DFCO event to achieve a minimum manifold absolute pressure (MAP) for combustion when the second DFCO event ends and fuel is provided to the engine; a catalyst temperature adjustment module that determines a catalyst temperature adjustment based on a catalyst temperature during the first DFCO event; an ambient temperature adjustment module that determines an ambient temperature adjustment based on an ambient air temperature during the first DFCO event; and an APC adjustment module that selectively adjusts the base APC based on the catalyst temperature adjustment and the ambient temperature adjustment and that controls at least one of the engine airflow actuators based on the adjusted base APC during the first DFCO event.