Abstract: The invention relates to a valve assembly (100) for a multi-scroll turbine (10) for controlling an overflow of exhaust gases between a first spiral (36) and a second spiral (38) and for controlling a bypass opening (50). The valve assembly 100 comprises a lever (110) and a valve closing element (120) which is operatively connected to the lever (110). Furthermore, the valve assembly (100) comprises a spring element (130) which is designed to pre-bias the valve closing element (120) the against lever (110).

Abstract: A variable nozzle unit includes a first plate, a second plate, a plurality of nozzle vanes each having a rotary shaft portion and a vane, a plurality of vane arms, and a unison ring. Each vane arm includes an engaging portion. The plurality of vane arms includes at least one extension arm. The extension arm includes an extension portion that has a shape extending from the engaging portion toward the second plate. The second plate has a receiving portion that receives the extension portion. The receiving portion includes a pair of contact walls, wherein the contact walls are brought into contact with the extension portion respectively at a position where each of the nozzle vanes maximizes the flow passage area of the exhaust air passage and at a position where the nozzle vane minimizes the flow passage area of the exhaust air passage.

Abstract: A turbocharger includes a turbine housing and a wastegate valve. The turbine housing defines two bypass passages. The wastegate valve opens and closes the two bypass passages. The turbine housing has a valve seat surface that is a flat surface that the wastegate valve contacts. The wastegate valve has a valve surface and a depression. The valve surface is a flat surface that faces the valve seat surface when the wastegate valve is in a closed state. The depression is depressed from the valve surface. The depression is located at a portion that faces a region located between openings of the two bypass passages when the wastegate valve is in the closed state.

Abstract: A turbocharger wastegate actuator arm includes a first section made from a rigid composite material, a second section made from a rigid composite material, and a third section made from a flexible polymeric material positioned between and interconnecting the first and second sections and adapted to allow angular deflection of the first section relative to the second section, wherein a longitudinal axis of the first section and a longitudinal axis of the second section define a first angle when the actuator arm is in the first position and the longitudinal axis of the first section and the longitudinal axis of the second section define a second angle when the actuator arm is in the second position, the first angle being greater than the second angle.

Abstract: A lever for a VTG guide vane arrangement of a radial turbine with a main body with a fork-shaped coupling section with two limbs. A wear-resistant contact block is arranged on an inner side of at least one of the limbs. The wear-resistant contact block is designed for operative engagement with an adjusting ring of the VTG guide van arrangement, giving rise to the effect of increased wear resistance at least in the region of the engagement with the VTG guide vane arrangement. Furthermore, a VTG guide vane arrangement having such a lever, a radial turbine having such a VTG guide vane arrangement, and a supercharging device having such a radial turbine.

Abstract: A nozzle vane of a variable geometry turbocharger comprises: a nozzle vane body rotatably disposed in an exhaust gas passage defined between a shroud surface and a hub surface; and a flange portion provided on at least one of a shroud-side end surface or a hub-side end surface of the nozzle vane body, and formed around a center of rotation of the nozzle vane body.

Abstract: A turbocharger includes a turbine housing and a wastegate valve. The turbine housing defines a bypass passage. The turbine housing has a valve seat surface that is a flat surface that the wastegate valve contacts. The wastegate valve opens and closes the bypass passage. The wastegate valve has a valve surface that is a flat surface facing the valve seat surface. When the geometric center of the shape of an outer edge of the valve surface is called the valve center and the geometric center of the shape of an opening of the bypass passage in the valve seat surface is called the opening center, the shortest distance from the valve center to a central axis of the shaft is longer than the shortest distance from the opening center to the central axis of the shaft.

Abstract: In an EGR device in which an EGR passage is merged with an intake passage communicating with a compressor housing of a supercharger, the EGR passage is extended to the inner side of the intake passage with respect to a junction between the EGR passage and the intake passage, and the position of a terminal end of an extended passage section in an air flow direction matches the position of a terminal end of the intake passage, the extended passage section being the EGR passage extended. The merged passage section where the EGR passage is merged with the intake passage is a joint pipe that connects an intake tube and the compressor housing.

Abstract: An engine device is equipped with an engine, a supercharger having a turbine, a compressor and a waste gate valve, and a control device that controls the engine and the supercharger, and that performs an abnormality diagnosis of a relationship between an intake air amount of the engine and a supercharging pressure as a pressure downstream of the compressor in the intake pipe. The control device performs boost control for controlling the waste gate valve such that the supercharging pressure becomes higher when a predetermined condition is fulfilled than when the predetermined condition is not fulfilled. The control device further sets a threshold for use in the abnormality diagnosis, based on whether or not the boost control is performed.

Abstract: Methods and systems are provided for a turbocharger system. In one example, a system comprises an actuator configured to adjust a position of a plurality of guide vanes and a position of a coolant valve configured to adjust coolant flow through a turbine coolant jacket or a compressor coolant jacket.

Abstract: New and/or alternative approaches to physical plant performance control that can account for the health of the physical plant. A physical plant may be controlled by configurable controller, which may further comprise a low level controller associated with a higher level controller such as an Engine Control Unit (ECU). The ECU uses modeling to calculate an estimated operating value of a first parameter in the physical plant, and also uses a sensor to measure an operating value of the first parameter. The measured and modeled values are compared to determine the state of health (SOH) of the physical plant or a component thereof. The SOH may be stored, transmitted, or used to modify one or more control values used by the low level controller.

Abstract: An exhaust turbocharger includes an exhaust control device provided with an exhaust flap for adjusting an exhaust gas flow flowing through a turbine stage of the exhaust turbocharger during the operation thereof, a control gear coupled to the exhaust flap, and a servomotor via which the exhaust flap can be moved in a regulated and/or controlled manner by operation of the control gear at least between a closing position, in which the exhaust flap closes an exhaust gas opening in a turbocharger housing of the turbocharger, through which exhaust gas flows during the operation of the exhaust turbocharger, and at least one other position in which the exhaust flap allows exhaust gas to flow through the exhaust gas opening. The control gear is a self-locking gear via which the exhaust flap can be prestressed in the closing position thereof in relation to the turbocharger housing.

Abstract: A rotor includes: a hub; and a plurality of blades disposed on the hub. Each of the plurality of blades includes a suction surface, a pressure surface, a leading edge, a trailing edge, a tip-side edge, and a hub-side edge. In a cross-section of each blade at a given chord position between the leading edge and the trailing edge, an angle of at least one of the suction surface or the pressure surface with respect to a blade height direction of the blade increases in a direction from the hub-side edge to the tip-side edge over a region from the hub-side edge to the tip-side edge, in at least a range from the leading edge to a chord position away from the leading edge toward the trailing edge.

Abstract: A crank and linkage assembly for a component of a turbocharger includes a linkage having an end defining a through bore, an inner surface of the through bore defining a linkage groove therein. The crank has a pin whose outer surface defines a pin groove. A generally polygonal retaining ring of elastically deformable wire is installed partially in the linkage groove and partially in the pin groove to retain the linkage on the pin while allowing the linkage to rotate about the pin axis. Vertices of the retaining ring are in the linkage groove, while sides of the retaining ring are in the pin groove. Once the retaining ring is pre-installed in the linkage groove, the assembly can be assembled by a push-to-connect process.

Abstract: A valve device for a turbine of an exhaust gas turbocharger includes a valve element for at least partial fluidic shutting of a bypass line via which a turbine wheel of the turbine can be bypassed by exhaust gas. The valve device also has an actuating arm which is coupled in an articulated manner to the valve element and via which the valve element can be pivoted and has at least one spring element via which the valve element is supported on the actuating arm. The valve element has at least one uneven supporting surface via which the spring element is supported on the valve element.

Abstract: The invention relates to a valve assembly (10) for a charging device, in particular for a wastegate of an exhaust gas turbocharger, comprising a spindle (100), a lever arm (110) coupled to the spindle (100), and a valve unit (200). The lever arm (110) has a connecting element (112), designed as at least partially spherical, and the valve unit (200) has an accommodation region (212) with at least one first conical accommodation surface (214) in which the connecting element (112) is arranged.

Abstract: The high pressure compressor wheel of a two stage turbocharger assembly is cooled by charge air bled from the charge air flowpath downstream of the aftercooler. A wastegate may be arranged across the high pressure stage and operated by an actuator which in turn is operable by the static or dynamic pressure of the charge air in the cooling flowpath. The cooling airflow may be blocked to open the wastegate and released or resumed to close the wastegate so that cooling air is supplied only while the high pressure compressor wheel is under load.

Abstract: A turbine arrangement for controlling a gas flow, in particular for a fuel cell (2) or for an internal combustion engine (3), and a charging device having such a turbine arrangement, is described, in which the gas flow supplied by an inlet (10) can be controlled by an adjustable slide bushing (48) covering an entry opening (43) to form a turbine wheel (38) arranged in a turbine housing (30) between a closed position and an open position, such that, in the closed position, the gas flow is throttled and, in the at least partially open position, a controllable proportion of the gas flow drives the turbine wheel (38) arranged on a shaft (22) of an electric engine (18) functioning as a generator for recuperating energy, wherein the slide bushing (48) releases a wall opening (64) in the turbine housing (30) above a predetermined value of the gas flow, such that a bypass channel emerges in order to guide gas flow past the turbine wheel (38) directly to an outlet opening (24).

Abstract: The invention relates to a device for controlling the swirl of a fluid (2) flowing in a pipeline (1). The invention was based on the object of creating a device with which the adaptation of the swirl (2B) of a fluid (2) flowing in a pipeline (1), even in the case of constantly changing initial swirl (2B), to the desired flow conditions in the pipeline (1) is possible. Said object is achieved in that a swirl measuring device (4) and a swirl control device (6) are provided at predetermined positions of the pipeline (1), and the device has an evaluation and encoder unit (5), wherein, in the presence of differences between the measured actual swirl (2B) and the desired swirl, a corrective value can be determined by means of the evaluation and encoder unit (5), and the swirl control device (6) corresponds with the evaluation and encoder unit (5) and, by means of the swirl control device (6), the present swirl (2B) can be adapted to the predetermined desired swirl in accordance with the determined corrective value.

Abstract: In an opposed-piston engine which includes a catalytic aftertreatment device in its exhaust system an exhaust gas condition indicating a catalyst temperature of the aftertreatment device is monitored. When the catalyst temperature is near or below a light-off temperature, a catalyst light-off procedure is executed to elevate the temperature of the catalyst.