Split axial cam shifting system variable valve actuation functions

A valve train assembly configured to selectively open and close intake and exhaust valves associated with cylinders of an internal combustion engine, the valve train comprising:

• an exhaust rocker arm assembly having a plurality of exhaust rocker arms;
• an exhaust cam assembly associated with each of the cylinders and having three distinct cam profiles including a first cam profile, a second cam profile and a third cam profile;
• a first axial shifting cam assembly movable between a first, second and third axial position corresponding to alignment of the respective three distinct cam profiles with exhaust rocker arms associated with a first grouping of the cylinders;
• and
• a second axial shifting cam assembly movable between a first, second and third axial position corresponding to alignment of the respective three distinct cam profiles with exhaust rocker arms associated with a second grouping of the cylinders, distinct from the first grouping of cylinders;
• wherein the first axial shifting cam assembly operates independently from the second axial shifting cam assembly to provide three distinct valve lift profiles on the first grouping of cylinders and three distinct valve lift profiles on the second grouping of cylinders.

A valve train assembly configured to selectively open and close intake and exhaust valves associated with cylinders of an internal combustion engine, the valve train comprising:

• an intake rocker arm assembly having a plurality of intake rocker arms;
• an intake cam assembly associated with each of the cylinders and having three distinct cam profiles including a first cam profile, a second cam profile and a third cam profile;
• a first axial shifting cam assembly movable between a first, second and third axial position corresponding to alignment of the respective three distinct cam profiles with intake rocker arms associated with a first grouping of the cylinders;
• and
• a second axial shifting cam assembly movable between a first, second and third axial position corresponding to alignment of the respective three distinct cam profiles with intake rocker arms associated with a second grouping of the cylinders, distinct from the first grouping of cylinders;
• an exhaust rocker arm assembly having a plurality of exhaust rocker arms;
• an exhaust cam assembly associated with each of the cylinders and having three distinct cam profiles including a first cam profile, a second cam profile and a third cam profile;
• a third axial shifting cam assembly movable between a first, second and third axial position corresponding to alignment of the respective three distinct cam profiles with exhaust rocker arms associated with the first grouping of the cylinders;
• and
• a fourth axial shifting cam assembly movable between a first, second and third axial position corresponding to alignment of the respective three distinct cam profiles with exhaust rocker arms associated with the second grouping of the cylinders;
• wherein the first, second, third and fourth axial shifting cam assemblies operate independently.