Method for a variable displacement engine

摘要

Various systems and methods are described for controlling engine operation. One method comprises, during a first variable displacement engine (VDE) mode in an engine having four cylinders, deactivating a first cylinder of the four cylinders and firing a second, third, and fourth cylinder of the four cylinders, each firing event separated by 240 degrees of crank angle (CA). The engine may be operated in a non-VDE mode by activating the first of the four cylinders and firing the first cylinder between the third and fourth cylinders.

主权项

1. A method of operating an engine having an actual total number of cylinders equal to four via a controller, comprising:
sensing an engine operating parameter via a sensor; operating the engine in a first variable displacement engine (VDE) mode with a first cylinder of the four cylinders deactivated via adjusting an actuator operatively coupled to the controller and firing a second, third, and fourth cylinder of the four cylinders via the controller, each firing event separated by 240 degrees of crank angle (CA); and operating the engine in a non-VDE mode where all engine cylinders are firing via the controller, and where the first of the four cylinders fires between the third and fourth cylinders via the controller.