INTERNAL COMBUSTION ENGINE HAVING A PLURALITY OF EXHAUST PORTS PER CYLINDER AND CHARGE EXCHANGE METHOD FOR SUCH AN INTERNAL COMBUSTION ENGINE

摘要

A method for controlling valve actuation in an engine is provided. The method includes initiating combustion operation in a first cylinder, opening, via a first cam, a first exhaust valve coupled to the first cylinder for a first opening duration. The method further includes opening, via a second cam, a second exhaust valve coupled to the first cylinder for a second opening duration not equivalent to the first opening duration.