14 through a throttle 16 the throttle 16 regulates mass air flow into the intake manifold 14 air within the intake manifold 14 is distributed into cylinders 18 although four cylinders 18 are illustrated it can be appreciated that the engine can have a plurality of cylinders including but not limited to 2 3 5 6 8 10 12 and 16 cylinders a fuel injector not shown injects fuel that is combined with the air as it is drawn into the cylinder 18 through an intake port an intake valve 22 selectively opens and closes to enable the air fuel mixture to enter the cylinder 18 the intake valve position is regulated by an intake camshaft 24 a piston not shown compresses the air fuel mixture within the cylinder 18 a spark plug 26 initiates combustion of the air fuel mixture driving the piston in the cylinder 18 the piston drives a crankshaft not shown to produce drive torque combustion exhaust within the cylinder 18 is forced out through an exhaust manifold 28 when an exhaust valve 30 is in an open position the exhaust valve position is regulated by an exhaust camshaft 32 the exhaust is treated in an exhaust system although single intake and exhaust valves 22 30 are illustrated it can be appreciated that the engine 12 can include multiple intake and exhaust valves 22 30 per cylinder 18 the engine system 10 can include an.