An oil supply carrier assembly configured to be mounted to a valve train carrier having a plurality of rocker arms according to the present disclosure includes an oil supply carrier housing having a first oil inlet port and a second oil inlet port. The oil supply carrier housing supports an oil control valve and further includes first, second and third oil supply passages. The first oil supply passage is configured to deliver oil from the first oil inlet port on the valve train carrier to the oil control valve. The second oil supply passage is configured to deliver oil from the valve train carrier to at least one engine brake rocker arm of the rocker arms. The third oil supply passage is configured therein to deliver oil from the second oil inlet port to the rocker arms.

A lubrication system for an internal combustion engine of a work vehicle includes an engine oil sump and a pump unit fluidly connected to the engine oil sump to receive engine oil therefrom. The pump unit, in turn, includes a first oil pump comprising a variable displacement pump, a second oil pump, a drive line mechanically coupled to the first oil pump and the second oil pump that drives each of the pumps, and a manifold that directs engine oil from the engine oil sump to the first and second oil pumps. A first oil circuit is fluidly coupled to the first oil pump to direct a first flow of engine oil to piston spray jets in the engine and a second oil circuit is fluidly coupled to the second oil pump to direct a second flow of engine oil to one or more oiled engine components in the engine.

A switchable valve train assembly including a carrier housing defining a hydraulic circuit, a supply assembly, a plurality of rocker shafts, a plurality of separators, and a plurality of rocker arm assemblies is provided. Each one of the plurality of separators divides the rocker shafts into (1) a first chamber extending between a first chamber axial end and the separator, and (2) a second chamber extending between a second chamber axial end and the separator. The plurality of separators each include an orifice defined between the first chamber and the second chamber that provides fluid connection between the first chamber and the second chamber. Locking assemblies of the rocker arm assemblies are selectively actuated based on the supply assembly. The separators ensure that hydraulic fluid within the hydraulic fluid is de-aerated and that the second chambers remain primed with hydraulic fluid for faster actuation of the locking assemblies.

Systems and methods for an engine are provided. The engine includes a straight rocker shaft passing through each of a first rocker arm and a second rocker arm, the first rocker arm being shaped differently from the second rocker arm.

A rocker shaft assembly configured to support a rocker arm and deliver oil to the rocker arm and related method of making is provided. The rocker shaft assembly includes a core shaft and a sleeve. The core shaft has a core body including a main oil supply channel formed thereon. The sleeve has passages formed thereon. The sleeve is disposed around the core shaft. The main oil supply channel aligns with at least one of the passages on the sleeve. The main oil supply is milled into the core shaft.

An engine includes: a crankshaft disposed vertically; a piston that is connected to the crankshaft via a connecting rod and reciprocates in a cylinder; a cylinder head forming a combustion chamber of the cylinder at an end face of a movable portion of the piston; an intake valve and an exhaust valve disposed at the cylinder head, the intake valve being configured to take in fuel-air mixture, which is a mixture of fuel and air, the exhaust valve being configured to exhaust the fuel-air mixture; a low-rotation rocker arm (rocker arm) that drives the intake valve and the exhaust valve by rotation of a cam shaft; and a rocker shaft that supports the low-rotation rocker arm such that the low-rotation rocker arm is swingable, and an oil holding portion extending in an axial direction of the rocker shaft is provided between the rocker shaft and the low-rotation rocker arm.

A lubrication system for an internal combustion engine of a work vehicle includes an engine oil sump and a pump unit fluidly connected to the engine oil sump to receive engine oil therefrom. The pump unit, in turn, includes a first oil pump comprising a variable displacement pump, a second oil pump, a drive line mechanically coupled to the first oil pump and the second oil pump that drives each of the pumps, and a manifold that directs engine oil from the engine oil sump to the first and second oil pumps. A first oil circuit is fluidly coupled to the first oil pump to direct a first flow of engine oil to piston spray jets in the engine and a second oil circuit is fluidly coupled to the second oil pump to direct a second flow of engine oil to one or more oiled engine components in the engine.

An internal combustion engine includes at least one cylinder crankcase, at least one cylinder head (1), at least one overhead camshaft (2), at least two rocker arms (3) which are driven by the camshaft (2) and actuate the combustion valves, the camshaft(s) (2) being mounted in the cylinder head housing, and an oil supply line (9) which is situated in particular in the area of the top face of the cylinder head (1) for lubricating camshaft bearing brackets (10) and the rocker arm brackets (11).

Systems and methods for an engine are provided. The engine includes a straight rocker shaft passing through each of a first rocker arm and a second rocker arm, the first rocker arm being shaped differently from the second rocker arm.

A modular cylinder head is configured for use with combustion engine block configurations each having different valvetrain oiling pathways. Thus, when used with “LA-style” engine blocks, oil receiving/delivery ports provided by the cylinder head are compatibly interfaced with an oil outlet port provided by the engine block, thus allowing oil to pass from the engine block into the head for delivery to a valvetrain carried thereby. Alternatively, when the head is used with “Magnum-style” engine blocks, the oil receiving/delivery ports of the head are not used. Rather, a pushrod and lifter having internal ports are used by the cylinder head to allow oil to pass from the engine block, through the internal ports of the lifter and pushrod, and into the valvetrain.