Patent ID: 8443603
Filing Date: 2013-05-21
Classification: F02M

Abstract:
1. An internal combustion engine comprising: an engine block defining a plurality of cylinders, with at least two of the plurality of cylinders configured for operating as dedicated EGR cylinders; a cylinder head assembly attached to the engine block and defining a plurality of intake ports, with each intake port configured for supplying combustion air to a respective one of the plurality of cylinders; a compressor coupled to the engine block and configured for compressing the combustion air; and an intake manifold assembly including a plenum coupled to and in fluid communication with the compressor, a plurality of lower runners coupled to and in fluid communication with the plenum, and a plurality of upper runners, with each of the upper runners coupled to and in fluid communication with a respective one of the lower runners and at least one of the intake ports of the cylinder head assembly, wherein the intake manifold is configured for directing the compressed combustion air from the compressor to each of the plurality of intake ports; wherein the plurality of lower runners includes a single dedicated lower EGR runner configured to supply the combustion air to both of the dedicated EGR cylinders.