Patent ID: 9234467
Filing Date: 2016-01-12
CPC Classification: F01L,F02D,Y02T

Claim Text:
1. In an internal combustion engine having at least two cylinders and at least one exhaust valve providing selective communication between each cylinder and an exhaust manifold, a method of operating the engine and actuating the exhaust valves in each cylinder comprising the steps of: providing one or more first cams having a compression-release lobe and a main exhaust lobe adapted to transfer valve actuation motion to a first exhaust valve associated with a first cylinder; providing one or more second cams having an early exhaust valve opening lobe and a main exhaust lobe adapted to transfer valve actuation motion to a second exhaust valve associated with a second cylinder; and operating the engine in a first positive power mode of operation in which the first exhaust valve in the first cylinder is actuated for a main exhaust event without being actuated for a compression-release event, and the second exhaust valve in the second cylinder is actuated for a main exhaust event without being actuated for an early exhaust valve opening event.