Abstract: An electromagnetic pressure-regulating valve includes a housing comprising a first, a second and a third port, a valve seat, a valve closure member, an electromagnetic drive, and a biasing device. The electromagnetic drive comprises a coil wound on a coil carrier, an armature, a core, and an electromagnetic return-path device. The armature moves between a first and second end position and acts on the valve closure member. The biasing device is configured so that, when a current does not flow, the armature, and thereby the valve closure member, is positioned in a fail-safe setting on the valve seat so that a connection from the third port to each of the first and second ports is closed. The valve seat is connected via a fluid channel to the first and second ports. The armature is steplessly adjustable between the first and second end positions in every setting.

Abstract: Methods and systems are provided for coordinating adjustments to a compressor recirculation valve with adjustments to a binary flow turbine scroll valve to reduce surge. The scroll valve is closed to increase turbine energy while the compressor recirculation valve is opened to increase compressor flow. Concurrent adjustments to a wastegate may be used to provide boost pressure control.

Abstract: Methods and systems are provided for a branch communication valve in a twin turbocharger system. A branch communication valve may be positioned adjacent to a dividing wall separating a first scroll and a second scroll of the twin turbocharger. In an open position, the branch communication valve increases fluid communication between the first scroll and the second scroll and in a closed position, the branch communication valve decreases fluid communication between the first scroll and the second scroll.

Abstract: Provided is a control device for an internal combustion engine, which improves acceleration performance while maintaining fuel performance in a non-supercharging operation range. A bypass passage (33) which bypasses a turbine (32c, 32d) of a supercharger is provided. In the bypass passage (33), a wastegate valve (33a) for adjusting a flow-path area of the bypass passage (33) by a wastegate actuator (33b) is provided. For an operation in the non-supercharging operation range, an opening degree of the wastegate valve (33a) is set to fully close the wastegate valve (33a) when a ratio of a pressure (Pb) of an intake manifold (22) and an atmospheric pressure (P1) is smaller than a threshold value.

Abstract: A system and method for controlling temperature of a urea reductant to form ammonia for NOx reduction in a selective catalytic reducer coupled to a turbocharged engine exhaust by portioning a flow across the reductant of one or more of the following: a combination of compressed air and ambient air; and/or a combination of the exhaust upstream and downstream the turbine.

Abstract: An engine having a turbocharger may include an intake route control valve disposed on a first intake line that supplies outside air to an intake manifold, a second intake line bypassing the intake route control valve, a first exhaust line in which exhaust gas from an exhaust manifold flows, a second exhaust line bypassing an exhaust route control valve disposed on the first exhaust line to join the first exhaust line, a turbocharger operated by exhaust gas in the second exhaust line to compress intake air in the second intake line, and a first catalyst unit disposed at a downstream side of the exhaust route control valve on the first exhaust line. The first catalyst unit may include a first brick disposed at an upstream side and a second brick disposed at a downstream side of the first brick with a predetermined distance, and the second exhaust line joins the first exhaust line at a portion between the first brick and the second brick.

Abstract: A device for actuating a flap, in particular a wastegate flap in an exhaust gas turbocharger for an internal combustion engine, includes a control rod, which can be moved by an actuator substantially in an axial direction and is guided in a fist gate via a first pin at the side thereof facing away from the actuator. A carriage is articulated on the first pin and is guided in the first gate via a second pin on the side facing away from the first pin, wherein a pivot lever is articulated on the second pin and, on the side facing away from the second pin, the pivot lever is rotatably mounted in a machine housing, preferably a turbine housing, and the flap is arranged on the pivot lever on the side facing away from the second pin. By way of the articulated design, a non-linear adjustment of the flap is possible.

Abstract: An electronic control unit (ECU) with a surge avoidance unit, wherein, when a turbocharge compressor enters a surging state during vehicle deceleration, the ECU acquires a first target opening degree of a nozzle vane in a turbine of the turbocharger based on an operation state and a first opening map as a surge avoidance control, controls the nozzle vane to a surge avoiding first target opening degree, if the first target opening degree is smaller than a predetermined surge avoiding first target opening degree, and controls the nozzle vane to the first target opening degree, if the first target opening degree is not less than the surge avoiding first target opening degree.

Abstract: A system can include a turbine housing that defines a turbine wheel space, an exhaust chamber in fluid communication with the turbine wheel space and a control shaft bore that extends from the exhaust chamber to an outer surface of the turbine housing; a blunt body positionable above the turbine wheel space where the blunt body includes an opening and a lumen in fluid communication with the opening; and a suction conduit connectable for fluid communication between the control shaft bore of the turbine housing and the lumen of the blunt body. Various other examples of devices, assemblies, systems, and methods are also disclosed.

Abstract: An engine control apparatus controls an engine, by generating first and second instruction values to adjust an MAF of fresh air supplied to the engine and an MAP indicating a pressure of air supplied to the engine to respective target values, based on measured values of a first sensor which detects the MAF and a second sensor which detects the MAP, regardless of limiting conditions related to a totally closed or fully open state of an EGR and an VNT, switching a supplying destination of the measured values of the first and second sensors for a certain time after the generated first or second instruction value saturates, and generating the first and second instruction values to adjust the MAF and the MAP to the respective target values, based on the measured values of the first and second sensors, under the limiting conditions, when the switching occurs.

Abstract: A method to control the wastegate valve wastegate in a turbocharged internal combustion engine suited to allow air to directly flow from the intake manifold to the exhaust manifold; the method providing for determining a control law which provides an objective opening of an actuator controlling the wastegate valve as a function of a contribution in the absence of air flow directly from the intake manifold to the exhaust manifold and a contribution as a function of the quantity of air directly flowing from the intake manifold to the exhaust manifold.

Abstract: Methods and systems are provided for adjusting a volume control valve attached to a branch of a split exhaust manifold in a boosted engine system. Volume control valve adjustments are used at different engine operating conditions to improve engine performance and boost response. One example method includes closing the volume in response to a tip-in when increased boost is needed for exhaust turbine spool-up.

Abstract: An assembly includes a cast cartridge component that includes a base plate having an opening configured for receipt of a turbine wheel, a cylindrical wall that comprises a shroud portion, one or more supports disposed between the cylindrical wall and the base plate, an exhaust conduit that has an inlet, an outlet and a wastegate opening positioned intermediate the inlet and the outlet, and a substantially planar surface integral to the exhaust conduit, the wastegate opening located on the planar surface; and a wastegate outlet component that includes a cylindrical portion that extends between and defines an inlet and an outlet, and a cover portion configured to cover the substantially planar surface of the cast cartridge component to form a wastegate chamber where one or more openings provide for flow of exhaust from the wastegate chamber to the cylindrical portion. Various other examples of devices, assemblies, systems, methods, etc., are also disclosed.

Abstract: In a turbine for an exhaust gas turbocharger having a turbine housing with a turbine rotor rotatable supported therein and including spiral channels for directing exhaust gas onto the turbine wheel, at least one annular blocking element is supported between the spiral channels and the turbine wheel so as to be rotatable in the peripheral direction of the turbine wheel and additionally movable in the axial direction of the turbine wheel for a controlling the exhaust gas flow to the turbine wheel between impulse turbine mode when extended into the space between the turbine wheel and the spiral chamber and an accumulation made when retracted, with the gas flow through the turbine wheel or by-passing the turbine wheel being adjustable by rotation of the blocking element.

Abstract: A turbocharger controller includes a turbocharger compressor temperature module having a compressor inlet air temperature input, and a turbocharger compressor pressure module including a compressor inlet pressure input and a compressor outlet pressure input. A memory module includes a compressor outlet temperature calibration map and a compressor pressure ratio look-up table. A turbocharger boost pressure ratio control module is operatively connected to the turbocharger compressor temperature module, the turbocharger compressor pressure module, and the memory module. The turbocharger boost pressure ratio control module is configured to selectively compare compressor outlet pressure and compressor inlet pressure with values in the compressor ratio look-up table to determine a turbocharger boost pressure set point establishing a desired compressor outlet temperature.

Abstract: A system and method for operating an engine turbocharger is described. In one example, the turbocharger is rotated in different directions in response to operating conditions. The system and method may reduce engine emissions.

Abstract: Disclosed is a pipe arrangement (1) comprising a pipe element (2) that is used to connect, in particular fluidically connect, a turbine outlet of one turbocharger (15) to a turbine inlet of another turbocharger (17). The pipe arrangement is characterized in that a first pipe section (8) of the pipe element (2) includes a first fastening device (14) for attaching a first turbocharger (15) as well as a second fastening device (20) for attaching the pipe element (2) to a first support element (21) of an internal combustion engine. Furthermore, a second pipe section (9) includes a third fastening device (16) for attaching a second turbocharger (17) as well as a fourth fastening device (24) for attaching the pipe element (2) to a second support element (25) of an internal combustion engine.

Abstract: A method is disclosed for checking a valve on an exhaust gas turbocharger of an internal combustion engine, wherein an exhaust gas flow exits the internal combustion engine, a first portion of said flow flowing through a turbine of the exhaust gas turbocharger into an exhaust gas system and a second portion flowing through the valve into the exhaust gas system, wherein said method includes the steps of varying a fuel-to-air ratio in a fresh gas supplied to the internal combustion engine, determining a residual oxygen content in the exhaust gas system, and determining that the valve is defective if a variation of the residual oxygen content occurs in a manner different than a predetermined manner of the variation of the fuel-to-air ratio in the fresh gas. A device for checking the valve can be integrated into an integrated engine control unit of the internal combustion engine.

Abstract: An exhaust-gas supply device (1) of a turbine wheel (2) of an exhaust-gas turbocharger (3), having a two-channel turbine housing (4) and an exhaust manifold (7) which can be connected to an internal combustion engine (8), which exhaust manifold (7) has a first manifold channel (9) which connects first cylinders (Z1, Z4) of the internal combustion engine (8) so as to form a first manifold exhaust-gas path length, and a second manifold channel (10) which connects second cylinders (Z2, Z3) so as to form a second manifold exhaust-gas path length, to generate virtually identical overall exhaust-gas path lengths of the two channels.

Abstract: A regulating flap arrangement (1) in a flange connection (2) between a turbine housing of a two-stage exhaust-gas turbocharger and an exhaust manifold of an engine, having a regulating flap plate (5) which is pivotable between an open position and a closed position for opening and closing a connecting opening (6) arranged in the flange connection (2); having an insert ring (7) which is arranged in the connecting opening (6); and having a sealing arrangement (8), wherein the sealing arrangement (8) has two V-rings (8A, 8B), of which a first V-ring (8A) is arranged in a first groove (9) provided adjacent to the connecting opening (6), and the second V-ring (8B) is arranged in a second groove (10) which is arranged, spaced apart radially outward from the first groove (9), in the flange connection (2).

Abstract: An assembly can include a turbine housing that includes a bore, a wastegate seat and a wastegate passage that extends to the wastegate seat; a bushing configured for receipt by the bore; a rotatable wastegate shaft configured for receipt by the bushing; a wastegate arm extending from the wastegate shaft; and a wastegate plug extending from the wastegate arm where the wastegate plug includes a profile, defined in part by a portion of a torus, for contacting the wastegate seat to cover the wastegate passage and, for example, defined in part by a portion of a modified sphere or a portion of a cone. Various other examples of devices, assemblies, systems, methods, etc., are also disclosed.

Abstract: An engine; an air cleaner which filtrates fuel air; a turbocharger which compresses intake fuel air; an intake pipe which connects the air cleaner and the turbocharger; and an intake passage which induces the fuel air taken from an intake port at an end part to the air cleaner, are included. The turbocharger is located at a front side lower part of the engine, and the air cleaner is located under a crankcase. The intake passage extends rearward from a rear part of the air cleaner, and thereafter, bends upward.

Abstract: A turbocharger system comprises a first relatively small turbocharger and a second relatively large turbocharger connected in series and an exhaust gas flow control valve. The exhaust control valve has an inlet port communicating with the exhaust gas flow upstream of the first turbine a first outlet port communicating with the exhaust flow downstream of said first turbine but upstream of said second turbine, and a second outlet port communicating with the exhaust flow downstream of said second turbine. The valve is operable to selectively permit or block flow through the first and second outlet ports.

Abstract: A system according to the principles of the present disclosure includes a boost control module and a temperature estimation module. The boost control module generates a wastegate command signal to control a position of a wastegate and thereby adjust an amount of exhaust gas allowed to bypass a turbine of a turbocharger through the wastegate. The temperature estimation module estimates at least one of a first temperature downstream from the turbine and a second temperature upstream from the turbine based on the wastegate command signal.

Abstract: In a turbine for an exhaust gas turbocharger of an internal combustion engine comprising a turbine housing part, which has at least two spiral channels with respective inlets through which exhaust gas of the internal combustion engine is directed onto a turbine rotor disposed in the turbine housing part, the turbine housing part is disposed in an accommodating chamber, which is formed by a further housing part of the turbine, and from which accommodating chamber exhaust gas of the internal combustion engine can flow through the channel inlets into the spiral channels.

Abstract: Methods and systems are provided for reducing turbo lag in a boosted engine. A boost reservoir coupled to the engine may be charged with compressed intake air and/or combusted exhaust gas. The pressurized charge may then be discharged during a tip-in to either the intake or the exhaust manifold.

Abstract: An exhaust gas recirculation control device of an engine is provided. The device includes: an exhaust turbocharger having a turbine disposed in an exhaust passage and a compressor disposed in an intake passage; a low-pressure EGR passage connecting a part of the exhaust passage downstream of the turbine to a part of the intake passage upstream of the compressor; a low-pressure EGR valve disposed in the low-pressure EGR passage and for changing a cross-sectional area of the low-pressure EGR passage; an exhaust shutter valve disposed downstream of the connected part of the exhaust passage to the low-pressure EGR passage, and for changing a cross-sectional area of the exhaust passage; a valve control device for controlling openings of the low-pressure EGR valve and the exhaust shutter valve; and a gear range detector for detecting a gear range of a transmission of a vehicle in which the engine is installed.

Abstract: System for protecting a turbo-supercharging unit (T, C), in particular for preventing a respective damage when a pressure of a respective lubrication oil is insufficient, comprising first bypass means (OV, GB) of exhaust gas, controlled as a function of a pressure of the lubricating oil of the turbo-supercharging unit (T, C), in order to allow to at least a part of the exhaust gas to bypass the turbine (T) when the pressure is below a first predetermined threshold.

Abstract: A method for controlling an engine includes the steps of, in response to a transient operating event, determining a first amount of exhaust gas recirculation (EGR) that if provided to an intake of the engine would avoid turbocharger compressor surge in a turbocharger, determining a second amount of EGR that if provided to the intake would avoid turbocharger compressor choke in the turbocharger, and determining a third amount of EGR that if provided to the intake would avoid engine smoking, and adjusting EGR provided to the intake of the engine in accordance with the determined first, second, and third amounts.

Abstract: An internal combustion engine has first and second non-deactivatable cylinder banks. Each cylinder bank is assigned exhaust lines which extend from exhaust manifolds. First and second exhaust-gas turbocharger in the exhaust line are assigned to the first and second cylinders, respectively. A first catalytic converter in the first exhaust line contains the first exhaust-gas turbocharger, and is arranged downstream of the first exhaust-gas turbocharger as viewed in the flow direction of the exhaust gas of the first cylinder bank. A second catalytic converter in the second exhaust line contains the second exhaust-gas turbocharger, and is arranged downstream of the second exhaust-gas turbocharger as viewed in the flow direction of the exhaust gas of the second cylinder bank. A flow transfer line is arranged between the first and the second exhaust line, and a first control element, by an exhaust-gas mass flow passing through the flow transfer line can be regulated.

Abstract: A control device of a premix combustion engine includes a hybrid turbocharger including a turbocharger having a compressor and a turbine, and a motor generator coupled with the compressor. A control unit controls the motor generator based on the operating conditions regarding a generator or the premix combustion engine and includes: an airflow rate computing unit for computing the necessary airflow rate required for the premix combustion engine, and an arithmetic unit for computing the power output or the rotation speed regarding the hybrid turbocharger to obtain the necessary airflow rate required for the premix combustion engine. Feedback control regarding the power output or the rotation speed as to the hybrid turbocharger is performed based on the computed results obtained by the arithmetic unit.

Abstract: A linear actuator for a variable-geometry member of a turbocharger includes a piston/rod assembly that can axially translate and also pivot to a limited extent. A permanent magnet is mounted in a fixed position within the actuator. A non-magnetized flux carrier is mounted in the piston/rod assembly, and its movement alters the magnetic field of the magnet. A Halls effects sensor detects the magnetic field and the signals produced by the sensor are used for determining axial position of the piston/rod assembly.

Abstract: An internal combustion engine has at least one cylinder group including a plurality of cylinders and at least one exhaust turbocharger, each cylinder including a plurality of outlet valves for exhaust gas, each outlet valve being assigned an outlet duct which opens into an exhaust manifold and via which the respective exhaust gas, after flowing through the respective outlet valve and outlet duct, can be guided in the direction of an exhaust turbocharger, and first outlet ducts of the cylinders being contoured in the manner of nozzles, and second outlet ducts of the cylinders being contoured in the manner of diffusers.

Abstract: A turbine for an exhaust turbocharger, in particular for a motor vehicle, has a turbine flap which controls an exhaust volume flowing through the turbine. A wastegate valve directs exhaust past the turbine and a wastegate flap controls an exhaust volume flowing through the wastegate valve. We also provide for an exhaust turbocharger, a motor vehicle having such an exhaust turbocharger, and for a method for operating such an exhaust turbocharger.

Abstract: A two-stage turbocharger system for an internal combustion engine is disclosed. The turbocharger system includes a high pressure turbine coupled to an exhaust manifold of the internal combustion engine, and a low pressure turbine having an inlet coupled to the high pressure turbine and an outlet coupled to an exhaust system of the engine. The turbocharger further includes a low pressure compressor having an inlet coupled to environment and an outlet coupled to a high pressure compressor. The high pressure compressor is coupled to an intake manifold of the internal combustion engine. The high pressure turbine is provided with a high pressure by-pass line having a high pressure controlled by-pass valve. The low pressure turbine is provided with a low pressure by-pass line having a low pressure controlled by-pass valve. A controlled valve is provided between the high pressure turbine and the low pressure turbine.

Abstract: Various methods for compensating a deflected linkage in a wastegate arrangement are provided. In one example, current is applied to an actuator to move a wastegate valve coupled through a linkage to the actuator for diverting gasses from a turbocharger. The position of the actuator is indicated, and a correction to said indicated actuator position is applied compensating for deflection of the linkage based at least on said applied current. Said applied current is adjusted when said corrected actuator position reaches a position corresponding to a desired valve position.

Abstract: An assembly can include a turbine housing that includes a bore, a wastegate seat and two wastegate passages that extend to the wastegate seat; a rotatable wastegate shaft configured for receipt by the bore; a wastegate arm extending from the wastegate shaft; and a wastegate plug extending from the wastegate arm where the wastegate plug comprises a profile defined in part by a portion of a torus, for contacting the wastegate seat in a closed state, and defined in part by two plug portions, for defining clearances with respect to the wastegate seat in an open state. Various other examples of devices, assemblies, systems, methods, etc., are also disclosed.

Abstract: A variable geometry turbocharger is simplified yet able to maintain pulse energy. In a first embodiment, a turbine housing is provided with a pivoting wall which pivots about a point near the entry to the turbine housing. By moving the wall about the pivot point, the effective volume of the turbine housing volute is varied, thus effectively reducing the volume of exhaust gas in the volute, allowing control of exhaust gas flowing to the turbine wheel. In the second embodiment of the invention, a rotating wedge segment within the volute is rotated from a first position to a second position, changing the effective volume of the volute and allowing control of exhaust gas flowing to the turbine wheel.

Abstract: A supercharged internal combustion engine, comprising a high-pressure turbine connected to a channel of a low-pressure turbine and a bypass line, branching from upstream the high-pressure turbine, connectable to the channels of the low-pressure turbine via a control element positioned within the bypass line, is provided. Adjusting the control element fluidly connects each of the channels of the low-pressure turbine to the bypass line responsive to the exhaust-gas flow rate to optimize the performance of the engine.

Abstract: A variable-vane assembly for a turbocharger includes an annular nozzle ring supporting an array of rotatable vanes, an insert having a tubular portion sealingly received into the bore of the turbine housing and having a nozzle portion extending radially out from one end of the tubular portion and being axially spaced from the nozzle ring with the vanes therebetween, and an annular retainer ring disposed radially outward of the nozzle ring and extending generally radially inwardly. The nozzle ring's face is stepped, and a radially inner edge of the retainer ring engages the face of the nozzle ring radially outward of the step, the radially inner edge of the retainer ring having an axial thickness that is less than the step height such that a remaining portion of the step is presented to the exhaust gas flowing through the nozzle.

Abstract: The base of an actuator housing 10 is arranged to face the side of a turbine housing, and a motor 16 is fixed to a motor support post that is protrusively provided toward the top of the actuator housing 10 such that the motor 16 is kept at a distance from the turbine housing.

Abstract: An approach for controlling a turbocharger bypass valve is disclosed. In one example, the turbocharger bypass valve is opened during engine cold start conditions to reduce turbocharger speed. The approach may reduce noise produced by the turbocharger during engine start and warm-up.

Abstract: An internal combustion engine control apparatus includes means that detects an inlet temperature that is a temperature in a vicinity of an inlet of a purification catalyst disposed in an exhaust path and means that detects a turbine temperature that is a temperature in a vicinity of an exhaust turbine of a turbo-supercharger disposed in the exhaust path, and also includes means that controls a valve overlap that is a state in which an intake valve and an exhaust valve of the internal combustion engine are open simultaneously. When the inlet temperature is lower than an inlet high temperature reference value, and the turbine temperature is higher than a turbine high temperature reference value that is higher than the inlet high temperature reference value, the valve overlap amount is increased so as to be greater than a turbine high temperature time reference amount.

Abstract: Various methods for determining the fully closed position of a wastegate valve are provided. In one example, a non-closed position command for a wastegate valve in a low-lift region relative to a valve seat is received. Prior to executing the position command, the wastegate valve is only temporarily closed to thereby determine a fully closed position.

Abstract: Various systems and methods are provided for controlling a wastegate in the presence of a degraded wastegate valve sensor. In one example, responsive to feedback from a wastegate valve sensor being unavailable, a wastegate valve is moved to an at least partially open position in part via exhaust pressures responsive to a desired boost being within a first range. Responsive to feedback from the wastegate valve sensor being unavailable, the wastegate valve is moved toward a fully closed position at a rate responsive to boost pressure dynamics responsive to the desired boost being within a second, different range.

Abstract: An turbocharger cartridge and engine cylinder head assembly includes a turbocharger cartridge that includes some but not all of the components of a turbocharger, while the engine cylinder head provides the components of the turbocharger that are not included in the cartridge. The cartridge includes a center housing rotating assembly having a shaft that joins a turbine wheel to a compressor wheel, the shaft passing through bearings housed in the center housing. The engine cylinder head defines a receptacle that receives the cartridge. The head also defines a diffuser and volute for the compressor, and a turbine volute. The cartridge defines a turbine nozzle and turbine contour, and further includes a wastegate unit as a part of the cartridge.

Abstract: A method includes: retarding spark timing relative to a predetermined spark timing when an engine torque output reduction is requested for a gear shift; estimating a first torque output of an engine based on N cylinders of the engine being fueled, an engine speed, an air per cylinder (APC), and the predetermined spark timing; estimating a second torque output of the engine based on M cylinders being fueled, the engine speed, the APC, and the spark timing. determining an initial pressure ratio across a turbocharger compressor; determining an adjustment based on M and the first and second torque outputs; generating a desired pressure ratio across the turbocharger compressor based on the adjustment and the initial pressure ratio; and controlling opening of a turbocharger wastegate based on the desired pressure ratio. N is a total number of cylinders of the engine and M is less than or equal to N.

Abstract: A turbocharger assembly includes a center housing rotating assembly, which comprises a center housing, bearings housed in the center housing, a shaft rotatably supported in the bearings, and compressor and turbine wheels affixed to opposite ends of the shaft; an engine cylinder head and a housing member formed together as a one-piece integral structure, wherein the housing member defines a compressor volute that receives compressed air from the compressor wheel, a turbine volute for receiving exhaust gas from the engine, a turbine nozzle for directing exhaust gas from the turbine volute into the turbine wheel, and a turbine contour; a compressor contour plug that defines an axial inlet for the compressor and a compressor contour; and a wastegate unit operable for allowing exhaust gas to bypass the turbine wheel when the wastegate unit is open and preventing exhaust gas from bypassing the turbine wheel when the wastegate unit is closed.

Abstract: Various apparatuses and systems are provided for a turbocharger. In one example, the turbocharger system includes a first turbine having an exhaust flow outlet and a second turbine having an exhaust flow inlet. The turbocharger system further includes a transition conduit fluidically coupling the outlet of the first turbine to the inlet of the second turbine, the transition conduit including an expansion region upstream of a first bend, and a bypass which routes exhaust flow around the first turbine, the bypass having an exhaust flow outlet fluidically coupled to the transition conduit downstream of the expansion region.

Abstract: A method for operating a turbocharger wastegate is disclosed. In one example, the wastegate is operated to provide a state of an engine air intake system air filter. The approach can provide a status the air intake filter via a sensor that has an alternative primary purpose thereby potentially reducing system cost.