Abstract: An engine component comprises one or more thermal barrier coatings applied to one or more areas of the engine component. The thermal barrier coatings reduce the temperature rate of change of the areas to which the thermal barrier coating is applied. Reducing the temperature rate of change can help reduce lattice structure damage caused by different temperatures in different areas of the engine component. The thermal barrier coating can be applied as a monolithic layer on a surface of the engine component or can be applied in different areas using patterns. The patterns allow for the tuning of the performance characteristics (temperature rate of change) of the areas of the engine component and can help reduce defect propagation, such as cracks, in the thermal barrier coating from one area of the thermal barrier coating to other areas of the thermal barrier coating.

Abstract: An engine component comprises one or more thermal barrier coatings applied to one or more areas of the engine component. The thermal barrier coatings reduce the temperature rate of change of the areas to which the thermal barrier coating is applied. Reducing the temperature rate of change can help reduce lattice structure damage caused by different temperatures in different areas of the engine component. The thermal barrier coating can be applied as a monolithic layer on a surface of the engine component or can be applied in different areas using patterns. The patterns allow for the tuning of the performance characteristics (temperature rate of change) of the areas of the engine component and can help reduce defect propagation, such as cracks, in the thermal barrier coating from one area of the thermal barrier coating to other areas of the thermal barrier coating.

Abstract: Controlling a hybrid power system includes calculating a power system state vector based on energy demand and a stored data array including a matrix defined by a power system hardware configuration. The control further includes producing a power request based on the power system state vector, and varying a flow of energy amongst energy devices using drive linkages in the hybrid power system based on the power request. Related apparatus, control logic and controller structure is disclosed.

Abstract: Operating an engine includes moving a piston in a combustion chamber between a bottom dead center position and a top dead center position in an engine cycle. A fuel is injected into the combustion chamber through a plurality of sets of nozzle outlets varied set-to-set with respect to outlet size and spray angle. Spray jets of the injected fuel are propagated in an impingement-limiting fuel spray pattern that is based on the set-to-set variation in outlet size and spray angle so as to limit dissipation of heat from combustion of the injected fuel to material of the engine by way of a thermal barrier coating (TBC) upon a surface of the combustion chamber.

Abstract: Controlling a hybrid power system includes calculating a power system state vector based on energy demand and a stored data array including a matrix defined by a power system hardware configuration. The control further includes producing a power request based on the power system state vector, and varying a flow of energy amongst energy devices using drive linkages in the hybrid power system based on the power request. Related apparatus, control logic and controller structure is disclosed.

Abstract: An engine includes a cylinder block having formed therein a plurality of cylinders, a main oil gallery, and a spray jet gallery. A cross-hole is fluidly connected to the main oil gallery and extends to the spray jet gallery. Oil spray jets are each fluidly connected to one of a plurality of oil feed holes fluidly connected to the spray jet gallery. An oil admission valve, which can be hydraulically actuated or electrically actuated, is supported in the cylinder block and movable between a closed position to block the spray jet gallery and each of the oil feed holes from the cross-hole, and an open position.

Abstract: A fuel injector assembly for an engine. The engine includes a cylinder head defining a through-hole. The fuel injector assembly includes an insert, having a first end and a second end, configured to be received within the through-hole and coupled to the cylinder head. The insert defines a bore extending from the first end to the second end. The fuel injector assembly further includes a fuel injector including a plurality of orifices, received within the bore of the insert; and a duct structure including a plurality of ducts, coupled to the insert such that the plurality of ducts align with the plurality of orifices to at least partially receive one or more fuel jets from the plurality of orifices of the fuel injector.

Abstract: An internal combustion engine includes an engine block having a cylinder, a cylinder head disposed on one end of the cylinder, a piston disposed within the cylinder, and a rim. A piston crown of the piston defines a piston bowl. The rim depends from at least one of the cylinder head and piston and is located radially inward from the piston crown. At least one of the piston crown and cylinder head defines a passageway that is configured to guide a squish flow from between the piston crown and cylinder head to the piston bowl to interact with a plurality of flames within the piston bowl to enhance combustion.

Abstract: A fuel injection system for an engine is provided. The fuel injection system includes a fuel injector adapted to inject at least one fuel jet within a combustion chamber of the engine. The fuel injection system also includes at least one plate disposed within the combustion chamber and in association with the at least one fuel jet. The at least one plate includes at least one opening provided therein. The at least one opening is adapted to at least partially allow passage of any one of the at least one fuel jet and a flame associated with the at least one fuel jet therethrough.

Abstract: A fuel injector assembly for an engine. The engine includes a cylinder head defining a through-hole. The fuel injector assembly includes an insert, having a first end and a second end, configured to be received within the through-hole and coupled to the cylinder head. The insert defines a bore extending from the first end to the second end. The fuel injector assembly further includes a fuel injector including a plurality of orifices, received within the bore of the insert; and a duct structure including a plurality of ducts, coupled to the insert such that the plurality of ducts align with the plurality of orifices to at least partially receive one or more fuel jets from the plurality of orifices of the fuel injector.

Abstract: A duct structure for a fuel injector assembly of an engine includes a first ring structure, a plurality of ducts, a plurality of posts, and an engagement structure. The fuel injector assembly includes a fuel injector having a plurality of orifices to discharge fuel. The first ring structure is configured to be coupled to a cylinder head of the engine, and defines a central axis. The ducts are circularly arrayed around the central axis, and are configured to provide passages to the fuel discharged from the fuel injector. The posts connect the ducts to the first ring structure. Further, the engagement structure is configured to engage with the fuel injector to align the ducts with the orifices such that each of the plurality of ducts is configured to receive fuel discharged from a corresponding one of the plurality of orifices.

Abstract: An internal combustion engine may include an engine block having a plurality of cylinders therein, with each cylinder being closed by a cylinder head. The internal combustion engine may also include a piston reciprocatingly mounted within each cylinder and defining a combustion chamber therebetween. The internal combustion engine may also include a fuel injector communicating fuel to the combustion chamber, the fuel creating a plurality of flames when ignited. The internal combustion engine may also include a piston crown extending from each piston and defining a piston bowl. The internal combustion engine may also include a rim depending from at least one of the cylinder head and piston and being provided radially inward from the piston crown.

Abstract: An internal combustion engine may have a piston and a plurality of flame guiding passageways provided within the piston. The passageways may be configured within a circumferential wall of the piston to guide the one or more flames away from a stagnation point and to a mixing zone.

Abstract: An internal combustion engine may have an engine block having a plurality of cylinders. The internal combustion engine may also have a piston reciprocatingly mounted with each cylinder and defining a combustion chamber therebetween. The internal combustion engine may also be configured with a fuel injector communicating fuel to the combustion chamber, the fuel creating a plurality of flame plumes when ignited. The internal combustion engine may also have a piston crown extending from the piston and defining a piston bowl, the piston crown including a circumferential wall terminating in a top ledge. Further, the internal combustion engine may include a plurality of fluid passageways in the piston crown, each fluid passageway including an ingress in the top ledge and an egress in the circumferential wall proximate the piston bowl.

Abstract: A connecting rod for an engine is provided. The connecting rod includes a first connecting rod portion and a second connecting rod portion. The second connecting rod portion is adapted to move with respect to the first connecting rod portion. The connecting rod further includes a compressible fluid contained in an internal volume. The compressible fluid is adapted to vary a length of the connecting rod such that the length of the connecting rod decreases based on a compression of the compressible fluid. Further, the length of the connecting rod increases based on an expansion of the compressible fluid. The connecting rod also includes at least one limit stop adapted to restrict a movement of the second connecting portion beyond a predefined limit. Further, the connecting rod is adapted to passively vary a compression ratio of the engine based on the variation in the length of the connecting rod.

Abstract: An exhaust emission prediction system includes an engine configured to generate a flow of exhaust and a controller configured to determine a first estimation of an amount of an emissions constituent at a first location using an empirical model. The first location is downstream of the engine. The controller is also configured to determine a second estimation of the amount of the emissions constituent at the first location using a physics-based model and determine a third estimation of the amount of the emissions constituent at the first location based on at least one of the first estimation or the second estimation.