Patent ID: 7444815

Claim:
An internal combustion engine, comprising: a first set of combustion cylinders; a first exhaust manifold associated with said first set of combustion cylinders; a second set of combustion cylinders; a second exhaust manifold associated with said second set of combustion cylinders; a turbocharger including a turbine fluidly coupled with said first exhaust manifold, said turbine being exhausted to ambient without fluid interconnection with said second exhaust manifold; an intake manifold common to said first and second set of cylinders; and an EGR system fluidly interconnecting said second exhaust manifold and said common intake manifold; including a first set of intake valves associated with said first set of combustion cylinders, a second set of intake valves associated with said second set of combustion cylinders, and a controller independently controlling a timing of said first set of intake valves relative to a timing of said second set of intake valves, thereby effecting a desired EGR rate through said EGR system.