Push rod engine with inboard exhaust

A multiple cylinder internal combustion engine comprising:

• an engine block having first and second cylinder banks arranged in a V configuration forming a valley therebetween;
• a valvetrain having a camshaft disposed within the engine block for actuating intake and exhaust valves via corresponding pushrods;
• at least one turbocharger disposed within the valley;
• first and second cylinder heads each associated with a respective one of the cylinder banks, each cylinder head having an associated intake manifold disposed on an outboard side of the engine for distributing intake air to all the cylinders within a corresponding one of the cylinder banks, and an exhaust passage for each cylinder connecting exhaust ports of an associated cylinder and extending to an inboard side of the cylinder head;
• and
• an exhaust manifold for each cylinder head disposed on the inboard side of each cylinder head and connecting exhaust passages of an associated cylinder bank to the at least one turbocharger disposed within the valley, wherein the valvetrain comprises a first plurality of rocker arms associated with the first cylinder bank and a second plurality of rocker arms associated with the second cylinder bank, the second plurality of rocker arms each having geometries different from any rocker arms in the first plurality of rocker arms.

A multiple cylinder internal combustion engine comprising:

• an engine block having first and second cylinder banks arranged at an angle and longitudinally offset relative to one another;
• a camshaft disposed within the engine block for actuating intake and exhaust valves via corresponding pushrods;
• a first cylinder head associated with the first cylinder bank, the first cylinder head having an integrated intake plenum with an outboard intake and intake runners coupling the plenum from an outboard side to corresponding cylinders and exhaust runners for each cylinder coupling exhaust ports of the cylinder to an exit for each cylinder disposed on an inboard side of the cylinder head generally rearward of a corresponding cylinder;
• a second cylinder head associated with the second cylinder bank, the second cylinder head having an integrated intake plenum with an outboard intake and intake runners coupling the plenum from an outboard side to corresponding cylinders, and exhaust runners for each cylinder coupling exhaust ports of the cylinder to an exit for each cylinder disposed on an inboard side of the cylinder head generally rearward of a corresponding cylinder;
• a turbocharger disposed generally between the first and second cylinder heads;
• a first exhaust manifold disposed inboard of the first cylinder head and coupling the exhaust exit of each cylinder of the first cylinder head to the turbocharger;
• a second exhaust manifold disposed inboard of the second cylinder head and coupling the exhaust exit of each cylinder of the second cylinder head to the turbocharger;
• and
• a valvetrain having a plurality of lifters for each cylinder and a plurality of pushrods for each lifter wherein each lifter actuates all intake valves or all exhaust valves associated with a particular cylinder using the plurality of pushrods associated with the lifter, each valve actuated with a corresponding rocker arm, wherein the first and second cylinder heads each include bores adapted to receive four valves per cylinder and wherein each lifter actuates two pushrods and associated valves.