Abstract: A rocker arm may include a first arm defining a first longitudinal bore and a second arm defining a second longitudinal bore. The rocker arm may house a locking assembly including a first actuation pin extending through a first radial passage in the rocker arm, a second actuation pin extending through a second radial passage in the rocker arm, and a first lock pin located in the first longitudinal bore between the first and second actuation pins. An actuation assembly may be engaged with the first and second actuation pins and may be linearly displaceable between first and second actuation positions. The first and second arms may be rotatable relative to one another when the actuation assembly is in the first actuation position and may be fixed for rotation with one another when the actuation assembly is in the second actuation position.

Abstract: A rocker arm may include a first arm defining a first longitudinal bore and a second arm defining a second longitudinal bore. The rocker arm may house a locking assembly including a first lock pin located within the first longitudinal bore, an actuation pin extending through a radial passage in the rocker arm and engaged with the first lock pin, and a first biasing member engaged with the first lock pin and urging the first lock pin toward the actuation pin and biasing the actuation pin radially inward. An actuation assembly may be engaged with the actuation pin and linearly displaceable between first and second actuation positions. The first and second arms may be rotatable relative to one another when the actuation member is in the first actuation position and may be fixed for rotation with one another when the actuation member is in the second actuation position.

Abstract: An engine assembly includes a coolant pump, an engine structure, a radiator supply feed and a radiator bypass feed. The engine structure defines a first set of cylinders, a first coolant return gallery and a first cooling jacket. The first coolant return gallery extends in a longitudinal direction from a first longitudinal end to a second longitudinal end of the engine structure. The first cooling jacket is in communication with the coolant pump and with the first coolant return gallery. The first coolant return gallery forms a radiator bypass passage providing the coolant fluid to the coolant pump and bypassing the radiator during a first operating condition and forms a radiator supply passage providing the coolant fluid to the radiator during a second operating condition.

Abstract: A cylinder head assembly includes a first member coupled to an engine block and a second member coupled to the first member. The first member defines a first port in communication with a first cylinder and a second port in communication with a second cylinder. The second member defines a longitudinally extending portion located on a first lateral half of the first member. A first control passage and a second control passage are defined between the first member and the longitudinally extending portion of the second member. The second member defines a wall separating the first and second control passages from one another.

Abstract: A windage tray, for an engine having a crankshaft and a sump, includes a tray that is generally shaped to be located at least partially between the crankshaft and the sump. The tray has at least one tail extending from the tray generally toward the sump to direct oil from the crankshaft toward the sump.

Abstract: An engine assembly may include an engine block defining a cylinder bore, a cylinder head coupled to the engine block, a first intake valve, a fuel injector in communication with the cylinder bore and a spark plug in communication with the cylinder bore. The cylinder bore may define a first diameter. The cylinder head may define a first intake port and a first exhaust port in communication with the cylinder bore. The first intake valve may be located in the first intake port and may define a second diameter at least 35 percent of the first diameter. The fuel injector and the spark plug may be located centrally relative to the cylinder bore.

Abstract: A rocker arm may include a first arm defining a first longitudinal bore and a second arm defining a second longitudinal bore. The rocker arm may house a locking assembly including a first lock pin located within the first longitudinal bore, an actuation pin extending through a radial passage in the rocker arm and engaged with the first lock pin, and a first biasing member engaged with the first lock pin and urging the first lock pin toward the actuation pin and biasing the actuation pin radially inward. An actuation assembly may be engaged with the actuation pin and linearly displaceable between first and second actuation positions. The first and second arms may be rotatable relative to one another when the actuation member is in the first actuation position and may be fixed for rotation with one another when the actuation member is in the second actuation position.

Abstract: A rocker arm may include a first arm defining a first longitudinal bore and a second arm defining a second longitudinal bore. The rocker arm may house a locking assembly including a first actuation pin extending through a first radial passage in the rocker arm, a second actuation pin extending through a second radial passage in the rocker arm, and a first lock pin located in the first longitudinal bore between the first and second actuation pins. An actuation assembly may be engaged with the first and second actuation pins and may be linearly displaceable between first and second actuation positions. The first and second arms may be rotatable relative to one another when the actuation assembly is in the first actuation position and may be fixed for rotation with one another when the actuation assembly is in the second actuation position.

Abstract: A gas valve apparatus for an internal combustion engine having a combustion chamber. The gas valve apparatus includes a rotary intake valve located between an outer intake port and inner intake port at the combustion chamber and a rotary exhaust valve located between an outer exhaust and an inner exhaust port at the combustion chamber. Selectively actuatable gates are located at an outer intake and exhaust ports for controlling the opening, closing, and duration of opening of the outer intake and exhaust ports.