In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system.

A required opening correction amount is calculated based on a target supercharging pressure and an actual supercharging pressure, a target opening is calculated based on a required opening and the required opening correction amount, an actual operating position of a wastegate valve is determined to correspond to a fully closed position when the wastegate valve is in a fully closed condition, an actual opening of the wastegate valve is calculated based on the fully closed position and the actual operating position, an operation amount of an actuator for aligning the target opening with the actual opening is calculated based on the target opening and the actual opening, and when the target opening corresponds to the fully closed condition and the actual operating position is not decreased at or above a prescribed rate, the fully closed position is updated to the actual operating position.

A required opening correction amount is calculated based on a target supercharging pressure and an actual supercharging pressure, a target opening is calculated based on a required opening and the required opening correction amount, an actual operating position of a wastegate valve is determined to correspond to a fully closed position when the wastegate valve is in a fully closed condition, an actual opening of the wastegate valve is calculated based on the fully closed position and the actual operating position, an operation amount of an actuator for aligning the target opening with the actual opening is calculated based on the target opening and the actual opening, and when the target opening corresponds to the fully closed condition and the actual operating position is not decreased at or above a prescribed rate, the fully closed position is updated to the actual operating position.

A method of manufacturing a compressor housing is provided comprising arranging a core with a die to define a mould cavity, solidifying a metal within the cavity to form a compressor housing comprising a diffuser first wall and an outlet volute first wall having an opening; the housing being formed such that a first angle is subtended between an outlet section of a surface of the diffuser first wall and a first section of a surface of the outlet volute first wall, wherein after the housing has been formed, the core is removed and a cut is applied, through the opening, to the first section of the surface of the outlet volute first wall to produce a cut section such that a second angle is subtended between the cut section and the outlet section of the surface of the diffuser first wall that is greater than the first angle.

A method of manufacturing a compressor housing is provided comprising arranging a core with a die to define a mould cavity, solidifying a metal within the cavity to form a compressor housing comprising a diffuser first wall and an outlet volute first wall having an opening; the housing being formed such that a first angle is subtended between an outlet section of a surface of the diffuser first wall and a first section of a surface of the outlet volute first wall, wherein after the housing has been formed, the core is removed and a cut is applied, through the opening, to the first section of the surface of the outlet volute first wall to produce a cut section such that a second angle is subtended between the cut section and the outlet section of the surface of the diffuser first wall that is greater than the first angle.

An internal-combustion engine has an electronically-controlled one of a turbocharger and an exhaust-driven turbo supercharger coupled to an exhaust duct of the engine, and the engine is controlled during a shift event of a transmission coupled to an output shaft of the engine by determining a target engine speed at the end of the shift event, and controlling electrical energy supplied to an electric machine, rotatably coupled to a rotatable shaft that is rotatably coupled to the electronically-controlled turbocharger or exhaust-driven turbo supercharger, to control rotation of the rotatable shaft coupled to the turbocharger or exhaust-driven turbo supercharger to attain the target engine speed.

An internal-combustion engine has an electronically-controlled one of a turbocharger and an exhaust-driven turbo supercharger coupled to an exhaust duct of the engine, and the engine is controlled during a shift event of a transmission coupled to an output shaft of the engine by determining a target engine speed at the end of the shift event, and controlling electrical energy supplied to an electric machine, rotatably coupled to a rotatable shaft that is rotatably coupled to the electronically-controlled turbocharger or exhaust-driven turbo supercharger, to control rotation of the rotatable shaft coupled to the turbocharger or exhaust-driven turbo supercharger to attain the target engine speed.

A two-piece tilting pad journal bearing (50a) is used to support a rotating assembly of a turbocharger (1). The tilting pad journal bearing (50a) includes a hollow, cylindrical bearing shell (52), and a bearing liner (72) disposed within the bearing shell (52). The bearing liner (72) includes a center portion (74), bearing pads (100), and an axially-extending arm (86) that connects each bearing pad (100) to the center portion (74).

A two-piece tilting pad journal bearing (50a) is used to support a rotating assembly of a turbocharger (1). The tilting pad journal bearing (50a) includes a hollow, cylindrical bearing shell (52), and a bearing liner (72) disposed within the bearing shell (52). The bearing liner (72) includes a center portion (74), bearing pads (100), and an axially-extending arm (86) that connects each bearing pad (100) to the center portion (74).

A flywheel is provided in combination with a hybrid machine, wherein said flywheel comprises, in a radial direction, from inward to outward, an inner turbine, an intermediate compressor, and an outer array of magnets. The turbine cooperates with said hybrid machine to spin faster when said machine decelerates, and slower when said machine accelerates. An inner turbine drives both said intermediate compressor and said hybrid machine. The outer array of magnets is driven by said hybrid machine to accelerate the flywheel to accelerate the flywheel during braking of said hybrid machine. Said hybrid machine communicates with said flywheel to house it and render energy from it, in a hybrid manner such that energy is stored in a pressure or electrical storage mode, or both pressure and electrical storage mode, to effect a regenerative mode that attains low fuel consumption.