초록 ▼

An internal combustion engine includes a first set of combustion cylinders and a second set of combustion cylinders. A first exhaust manifold is associated with the first set of combustion cylinders, and a second exhaust manifold is associated with the second set of combustion cylinders. A turbochar

An internal combustion engine includes a first set of combustion cylinders and a second set of combustion cylinders. A first exhaust manifold is associated with the first set of combustion cylinders, and a second exhaust manifold is associated with the second set of combustion cylinders. A turbocharger includes a turbine which is fluidly coupled exclusively with the first exhaust manifold. An EGR system fluidly interconnects the second exhaust manifold and an intake manifold.

대표청구항 ▼

The invention claimed is: 1. 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

The invention claimed is: 1. 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. 2. 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 in fluid communication with said first exhaust manifold and not in fluid communication with said second exhaust manifold; an intake manifold common to said first and second set of combustion cylinders in fluid communication with said second exhaust manifold and not in fluid communication with said first exhaust manifold; and 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 between said second exhaust manifold and said common intake manifold. 3. The internal combustion engine of claim 2, including an EGR cooler fluidly interconnecting said second exhaust manifold and said intake manifold. 4. The internal combustion engine of claim 3, wherein said turbocharger includes a compressor having a discharge, and including a charge air cooler coupled with said compressor discharge, said EGR cooler coupled with a discharge from said charge air cooler. 5. The internal combustion engine of claim 4, wherein said charge air cooler comprises an air-to-air intercooler. 6. The internal combustion engine of claim 2, wherein said turbine includes a variable geometry turbine. 7. The internal combustion engine of claim 6, including a particulate filter coupled with a discharge from said variable geometry turbine. 8. The internal combustion engine of claim 2, wherein said first set of combustion cylinders and said second set of combustion cylinders are equal in number.