Abstract: A centrifugal compressor for a turbocharger includes an inlet-adjustment mechanism in an air inlet for the compressor, operable to move between an open position and a closed position in the air inlet. The inlet-adjustment mechanism includes a plurality of vanes formed as ring segments and disposed about the air inlet and each movable circumferentially and radially inwardly through a slot in the air inlet wall so as to form an orifice of reduced diameter relative to a nominal diameter of the inlet. Movement of the inlet-adjustment mechanism from the open position to the closed position is effective to shift the compressor's surge line to lower flow rates.

Abstract: A turbocharger can include a center housing; a compressor assembly operatively coupled to the center housing; and a turbine assembly operatively coupled to the center housing, where the center housing includes a bearing boss that includes a bore wall with opposing axial ends that define an axial through bore having opposing axial openings, an oil inlet, an oil outlet, an arcuate oil passage in fluid communication with the oil inlet, an oil passage in fluid communication with the arcuate oil passage and an opening in the bore wall, and an oil drainage passage in fluid communication with the opposing axial openings of the through bore and in fluid communication with the oil outlet.

Abstract: The present invention provides a controller and a control method for an internal combustion engine, which can suppress the generation of an annoying collision noise and abnormal heating of a motor of an actuator, which are generated by contact of the output shaft of the actuator with an opening side stopper of the actuator. The controller and the control method for the internal combustion engine are configured such that a target opening (Sv) of the valve is set to the smaller of: a required target opening (Sv_dem) computed so that a target supercharging pressure (Sp) and an actual supercharging pressure (Pp) are matched with each other; and a restricted target opening (Sv_lmt) computed based on a fully closed position learning value (Pv_lrn), which corresponds to an actual position detected by a position sensor, when the valve is located in the fully closed position, and on the restricted target position.

Abstract: A system for controlling a variable turbocharger includes: a first controller outputting a duty value for adjusting an opening degree of a vane of a turbocharger, and a second controller checking opening or closing operations of the vane when the first controller adjusts the opening degree of the vane. In particular, the second controller outputs a corrected duty value by correcting the output duty value, based on a correction map, in consideration of a back pressure according to whether the vane is opened or closed.

Abstract: Methods and systems are provided for injecting water stored in a water reservoir at a plurality of locations in an engine system, including directly into engine cylinders, upstream of a turbocharger turbine, and at an exhaust manifold, and controlling a water level of the water reservoir. In one example, a method may include supplying the water stored in the water reservoir to one or more of a water injection system, a windshield wiper system, an engine coolant system, and a drinking water system based on water supply conditions and responsive to engine operating conditions. When the water level is low (e.g., below a threshold), supply to the water injection system may be prioritized.

Abstract: In cases where an EGR device is provided in which an EGR gas is recirculated to an upstream side of a compressor, the generation of condensed water is suppressed in an intake passage at the downstream side of the compressor. In the case where the temperature of a wall surface of the intake passage estimated or detected by a temperature detector is equal to or less than a predetermined temperature, a rotational speed of a turbine is made higher than in the case where the estimated or detected temperature of the wall surface of the intake passage is higher than the predetermined temperature, and torque of an internal combustion engine is adjusted such that an amount of change in an output of the internal combustion engine at the time of the rotational speed of the turbine being thus made higher falls within a predetermined range.

Abstract: A turbocharger for an internal combustion engine includes a center housing and a bore defined by the center housing. The bore has a primary annular groove and a secondary annular groove configured to receive a fluid. A journal bearing is disposed within the bore proximate to a proximate end of the shaft such that the journal bearing, together with the rotating shaft, feeds fluid to the primary and secondary annular grooves. The shaft is further coupled to a turbine wheel and a compressor wheel. The shaft has a longitudinal axis and is supported by the journal bearing for rotation within the bore about the axis. The primary and secondary annular grooves are each in fluid communication with a drain gallery.

Abstract: A method of joining parts of the wastegate assembly, and a wastegate assembly includes an arm defining a hole. The wastegate assembly also includes a shaft. The shaft includes a first end disposed inside the hole of the arm. The shaft includes an outer surface defining a groove disposed inside the hole of the arm. The arm and the first end of the shaft are welded together to form a joint having a joint root region disposed adjacent to the groove. A turbocharger includes a compressor, a turbine and a rotating assembly driven by exhaust gas. The rotating assembly has a turbine wheel disposed inside the turbine and a compressor wheel disposed inside the compressor. The turbocharger further includes the wastegate assembly described above, and the wastegate assembly defines an opening configured to selectively redirect at least a portion of the exhaust gas to bypass the turbine wheel.

Abstract: An internal combustion heat engine, of which the architecture of one elementary “cylinder” includes 4 identical mobile couplings distributed about the Z axis of the engine, consisting of a segmented “piston” driven by the crank pin of a crankshaft and guided by a roller rolling in a slide. The crankshafts, which are parallel and synchronized by a gear mechanism, perform one revolution per cycle. Each piston includes a sliding surface that nearly touches the cylinder face of the adjacent piston, but on which the segmentation slides in sealed contact. The concave shape of the 4 overlapping faces encloses a chamber volume that changes cyclically: at a minimum, having a quasi-spherical shape during combustion, reducing the heat losses at the walls, and at a maximum, uncovering the ports allowing intake and exhaust via transfer units and manifolds with the possibility of more economical Miller/Atkinson distribution, via rotary plates.

Abstract: A basic regeneration completion pressure difference value is set based on a predicted deposition amount of incombustible deposits produced steadily on a particulate filter, and a corrected regeneration completion pressure difference value higher than the basic regeneration completion pressure difference value is set based on a deposition amount of incombustible deposits deposited unsteadily on the particulate filter. After regeneration processing starts, when a time for which a pressure difference value is maintained to be equal to or greater than the basic regeneration completion pressure difference value after decreasing to the corrected regeneration completion pressure difference value exceeds a prescribed regeneration completion time, the regeneration processing ends.

Abstract: A turbo-compressor comprises a compressor wheel having an attachment arrangement for attaching the wheel to a drive shaft. The attachment arrangement includes an axially extending spigot internally radially located in a bore in the drive shaft and secured to the drive shaft by fastening means into the rear of the compressor wheel. Thus the compressor wheel expands and tightens into the shaft at speed. Furthermore, the nose of the compressor wheel is free to accept an aerodynamic profile.

Abstract: A control device (10) for a supercharging system for supplying compressed intake air to an engine (6) includes: an engine controller (10A) including an engine signal input part (10A1) and an engine control part (10A2) configured to control an operational state of the engine and to compute a target boost pressure of a supercharger (4); and a turbo controller (10B2) including a turbo signal input part (10B1) and a turbo control part (10B2) configured to compute a margin of the supercharger. The control device is configured to compute a target boost-pressure corrected value by correcting the target boost pressure in accordance with a magnitude of the margin computed by the turbo control part, and to control a boost-pressure control unit (12) so that the boost pressure of the supercharger reaches the target boost-pressure corrected value.

Abstract: Embodiments for an engine coupled to a first turbocharger and a second turbocharger are provided. One example includes responsive to a first condition, deactivating a first turbine of the first turbocharger and meeting a boost demand via operation of the second turbocharger, and responsive to deactivating the first turbine, increasing a pressure at a compressor-side end of a bearing arrangement of a shaft of the first turbocharger. In this way, oil leakage from the bearing arrangement may be reduced.

Abstract: Embodiments for operating an engine having parallel turbochargers and two fluidically coupleable, separated intake manifolds is provided. In one example, a method includes responsive to a first condition, operating a first cylinder group of an engine, deactivating a second cylinder group of the engine, and blocking fluidic communication between a first intake manifold coupled to the first cylinder group and a second intake manifold coupled to the second cylinder group, and responsive to a second condition, activating the second cylinder group and establishing fluidic communication between the first and second intake manifolds.

Abstract: An engine assembly including an engine core with at least one internal combustion engine, a first casing, a turbine module including a second casing located outside of the first casing, and a compressor module including a third casing located outside of the first and second casings. The turbine shaft extends into the first casing, is rotationally supported by a bearings all contained within the first casing, and is free of rotational support within the second casing. The first casing may be a gearbox module casing through which the turbine shaft is in driving engagement with the engine shaft. A method of driving a rotatable load of an aircraft, and an engine assembly with a rotary engine core, a gearbox module with a first casing, and a second module including a second casing located outside of the first casing and detachably connected to the first casing are also discussed.

Abstract: Provided is an exhaust gas purification device provided with a cover which can reduce radiated noise at low cost without impairing the heat shield function of the cover. Provided is an exhaust gas purification device comprising: an exhaust gas purification device body provided to the exhaust pipe of a diesel engine and purifying exhaust gas; and a substantially rectangular cover provided so as to cover at least a part of the exhaust gas purification device body and blocking heat radiated from the exhaust gas purification device body. The cover is provided with a plurality of protruding ribs formed on the surface thereof. The ribs comprise: radial ribs formed extending radially from a center section centered at the intersection of the diagonals of the cover; and a circumferential rib formed continuously along the entire circumference of a circle centered at the intersection.

Abstract: The disclosure relates to a spark-ignited charged internal combustion engine coupled to an exhaust gas turbocharger with a compressor mounted on a rotatable shaft, the rotatable shaft coupled to a turbine and to an electric auxiliary drive. The electric auxiliary drive of the exhaust gas turbocharger may be activated to increase rotational speed of the rotatable shaft to drive the compressor to supply boost to the engine. The electric auxiliary drive may be engaged or disengaged from the rotatable shaft, responsive to engine operating conditions, such as engine speed, rotation speed of the rotatable shaft, exhaust volume, and engine boost demand.

Abstract: Various methods and systems are provided for adjusting an amount of intake airflow diverted away from an intake manifold and to atmosphere in response to a temperature of exhaust entering a turbocharger turbine and a target pre-turbine temperature. In one example, an amount of intake airflow entering engine cylinders, and thus an air-fuel ratio entering the engine cylinders, may be controlled to maintain the temperature of exhaust entering the turbocharger turbine at the target pre-turbine temperature.

Abstract: An internal combustion engine system with heat recovery includes an internal combustion engine with a waste heat passage, an electric motor, a heat recovery assembly including a working fluid circulation circuit with a working fluid, a first heat source which is adapted to be heated by the waste heat passage and adapted to heat the working fluid, and an expander engine, which is operated by the heated working fluid, and a splitting device, which is connected to the electric motor and is adapted to be connected to a drivetrain of a vehicle and which splitting device is further connected to the expander engine, so that the expander engine is enabled to drive the drivetrain and/or the electric motor. The internal combustion engine system further includes at least a second heat source for providing heat to the heat recovery assembly. A vehicle including such an internal combustion engine system is also provided.

Abstract: A method of removing impurities from EGR by air blowing may include performing an air-blowing mode in which, when a current intake system pressure detected by a controller exceeds a target intake system pressure in an intake system, in which a mixture is supplied to an engine, a portion of the mixture, serving as compressed air, flows into an EGR path, through which a portion of exhaust, serving as EGR gas and flowing in the intake system and an exhaust system connected to the intake system, is supplied to the engine.