System and method for controlling a variable displacement engine

摘要

A system and method for controlling a variable displacement internal combustion engine 12 having dedicated actuators 52, 54; 200 associated with a group or bank of cylinders pre-positions actuators 52, 54; 200 associated with the deactivated cylinders based on operating conditions associated with the activated cylinders to reduce torque excursions during reactivation. In one embodiment, a variable cam timing mechanism 200 associated with the deactivated bank of cylinders is pre-positioned to achieve the stead state air charge based on engine speed and manifold pressure of the activated cylinders.