Valve control systems and methods for cylinder deactivation and activation transitions

摘要

An engine control system for a vehicle includes an air control module and a valve control module. The air control module determines a desired mass of air per cylinder (APC) based on a torque request and selectively increases the desired APC in response to a command to deactivate N cylinders of an engine. The valve control module disables intake and exhaust valves of the N cylinders of the engine in response to the command, determines intake and exhaust valve timing based on the desired APC, and controls camless intake and exhaust valve actuators of M other cylinders based on the intake and exhaust valve timing, respectively. The engine includes Q cylinders, M and N are integers greater than zero, and M plus N equals Q.

主权项

1. An engine control system comprising:
an air control module that determines a desired mass of air per cylinder (APC) based on a torque request and that selectively increases the desired APC in response to a command to deactivate N cylinders of an engine; and a valve control module that disables intake and exhaust valves of the N cylinders of the engine in response to the command, that determines intake and exhaust valve timing based on the desired APC, that controls camless intake and exhaust valve actuators of M other cylinders based on the intake and exhaust valve timing, respectively, and that increases intake valve duration of the M other cylinders as the desired APC increases, wherein the engine includes Q cylinders, M and N are integers greater than zero, and M plus N equals Q.