Abstract: Various methods and systems for operating an internal combustion engine are provided. In one embodiment, an example method for operating an internal combustion engine includes, under a first condition, charging a compressed air storage vessel via a compressor. The method further includes, under a second condition, directly injecting compressed air from the storage vessel to a cylinder of the engine to enhance fuel combustion.

Abstract: Termination of regeneration of a particulate filter may be based on a variable percent threshold of stored particulate, where the percent threshold of stored particulate depends on a current soot burn rate. In one example approach, a method for controlling regeneration of a diesel particulate filter comprises: terminating regeneration based on a particulate burning rate; wherein the particulate burning rate is based on operating conditions of the diesel particulate filter; the operating conditions including an amount of stored particulate in the diesel particulate filter and a temperature of the diesel particulate filter.

Abstract: In a turbine for an exhaust gas turbocharger of an internal combustion engine having a housing part which has a receiving chamber and which comprises a spiral duct through which exhaust gas of the internal combustion engine can flow, the spiral duct having an outlet cross-section via which exhaust gas is directed onto a turbine wheel disposed in the receiving chamber whereby the turbine wheel can be rotated, at least one flow control member is provided which can be moved in the circumferential direction of the receiving chamber and by means of which the flow cross-section can be adjusted, wherein a warp angle of the outer contour region of the wall over which the flow cross-section can be adjusted is smaller than a wrap angle over which the outer contour region thereof extends.

Abstract: A turbocharger cartridge and engine cylinder head assembly includes a turbocharger cartridge having a center housing defining a bore therethrough, bearings housed in the bore, a shaft rotatably supported in the bearings, a compressor wheel affixed to one end of the shaft, and a turbine wheel affixed to an opposite end of the shaft. The engine cylinder head defines a receptacle in which the turbocharger cartridge is disposed. The cartridge defines a cartridge oil circuit and the engine cylinder head defines an engine oil circuit. An oil circuit connector plug is removably installed in a socket in the head, the plug defining a connector passage that mates up with an oil supply conduit in the engine cylinder head and with an oil supply passage in the center housing such that oil is conducted from the oil supply conduit through the connector passage to the bore.

Abstract: A turbocharger for an internal combustion engine includes an oil-lubricated bearing, a feed line for the oil and a throughflow limiter for the oil.

Abstract: An internal combustion engine with an exhaust gas manifold, an exhaust gas line, an exhaust gas turbocharger, by which the compressor provided to charge combustion air for the internal combustion engine is driven, and a bypass line, which branches from the exhaust gas line and in which a power turbine is arranged, wherein a short-circuit line branches from the bypass line and leads to a section of the exhaust gas line located downstream of the exhaust gas turbocharger. In addition, a first valve is positioned in the section of the exhaust gas line located downstream of the exhaust gas turbocharger in such a way that exhaust gas leaving the exhaust gas turbocharger is diverted into the short-circuit line and then to the power turbine.

Abstract: An air supply pipe includes a curved pipe portion having a first end and a second end, a first straight pipe portion extended along a first direction and a second straight pipe portion extended along a second direction. The cross-sectional shape of the curved pipe portion is a rectangular shape having longer sides in a third direction.

Abstract: Methods and systems for fuel vapor canister purging in boosted engines are described. In one example, vapors are purged from the canister into an engine intake passage downstream of a throttle via an ejector during vacuum conditions, whereas during boost conditions, vapors are purged from the canister into an upstream inlet of a compressor via the ejector, the compressor arranged in the intake passage upstream of the throttle.

Abstract: A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.

Abstract: A method for assessing NO2 generation efficiency in a diesel engine after-treatment (AT) system having a diesel oxidation catalyst (DOC) downstream of the engine generating the NO2 and a selective catalytic reduction (SCR) catalyst downstream of the DOC converting NOX with the aid of the NO2. Engine exhaust gas flow is passed into the AT system and a reductant is injected into the gas flow between the DOC and the SCR catalyst. SCR inlet gas flow temperature is monitored during transient engine operation and DOC inlet and SCR catalyst outlet NOX concentrations are detected when the SCR catalyst inlet gas flow temperature is in a predetermined range. SCR catalyst NOX conversion efficiency is determined using the detected DOC inlet and SCR catalyst outlet concentrations of NOX. Additionally, whether the NO2 generation efficiency is at or above threshold efficiency is assessed by comparing the determined and threshold NOX conversion efficiencies.

Abstract: An object of the present invention is to ensure appropriate cooling amounts for two exhaust ports, respectively, in an internal combustion engine in which an exhaust port that communicates with an inlet of a turbine of a turbocharger and an exhaust port that does not communicate with the inlet of the turbine are formed in a cylinder head. A cooling apparatus for an internal combustion engine of the present invention has a first exhaust port and a second exhaust port formed in a cylinder head of the internal combustion engine. The first exhaust port communicates with an inlet of a turbine of the turbocharger. The second exhaust port does not communicate with the inlet of the turbine. Each cylinder of the internal combustion engine includes a first exhaust valve that communicates with the first exhaust port and a second exhaust valve that communicates with the second exhaust port.

Abstract: A turbocharger for an internal combustion engine includes a bearing housing with a bearing bore and a thrust wall. The bearing housing includes a journal bearing disposed within the bore. The turbocharger also includes a shaft supported by the journal bearing for rotation about an axis within the bore. The turbocharger also includes a turbine wheel fixed to the shaft and configured to be rotated about the axis by the engine's post-combustion gasses. The turbocharger additionally includes a compressor wheel fixed to the shaft and configured to pressurize an ambient airflow. Furthermore, the turbocharger includes a thrust bearing assembly pressed onto the shaft and configured to transmit thrust forces developed by the turbine wheel to the thrust wall. Pressing the thrust bearing assembly onto the shaft minimizes radial motion between the thrust bearing assembly and the shaft. An internal combustion engine employing such a turbocharger is also disclosed.

Abstract: A turbocharger for an internal combustion engine includes a shaft, a first turbine wheel, a compressor wheel, and a second turbine wheel. The shaft includes a first end and a second end and is supported for rotation about an axis. The first turbine wheel is mounted on the shaft proximate to the first end and configured to be rotated about the axis by post-combustion gasses emitted by the engine. The compressor wheel is mounted on the shaft between the first and second ends and configured to pressurize an airflow being received from the ambient for delivery to the engine. The second turbine wheel is mounted on the shaft proximate to the second end and configured to be rotated about the axis by a pressurized fluid. An internal combustion engine employing such a turbocharger is also disclosed.

Abstract: A turbocharger includes a housing, a first rotor wheel, a second rotor wheel, a driveshaft, a first bearing and a second bearing. The housing defines a first region, a second region, an intake air inlet, an intake air outlet and an exhaust gas inlet. The first rotor wheel is located in the first region and the second rotor wheel is located in the second region. The first bearing is located on a first axial side of the first rotor wheel axially between the first and second rotor wheels and supports the driveshaft for rotation relative to the housing. The second bearing is located on a second axial side of the first rotor wheel and supports the first rotor wheel for rotation relative to the housing.

Abstract: An engine (100) provided with a variable series supercharging system (7) composed of a high-pressure supercharger (10) and a low-pressure supercharger (20), a supercharging pressure sensor (63) for detecting the pressure of intake air pressurized by the variable series supercharging system (7), a high-pressure supercharger rotation sensor (61) for detecting the rotational speed of the high-pressure supercharger (10), a variable actuator (14) for adjusting the capacity of the high-pressure supercharger (10), and a control device (60) capable of controlling the variable actuator (14). The control device (60) controls the variable actuator (14) based on detection signals from the supercharging pressure sensor (63) and the high-pressure supercharger rotation sensor (61).

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: A turbocharger and engine cylinder head assembly includes a center housing rotating assembly (CHRA) and an engine cylinder head defining a receptacle for receiving the CHRA, the engine cylinder head defining a compressor volute. A diffuser is defined for receiving and diffusing the compressed air from the compressor wheel and supplying the compressed air to the compressor volute. The assembly includes a cap formed separately from the engine cylinder head and removably secured to the engine cylinder head, the cap defining one wall of the diffuser. An opposite wall of the diffuser is defined either by the engine cylinder head or a portion of the center housing, depending on whether the CHRA slides into the receptacle compressor-wheel-first or turbine-wheel-first. The compressor volute can be located on a turbine side of the diffuser.

Abstract: Various methods and systems are provided for an engine system for a vehicle. In one example, the engine system includes a turbocharger including a turbine, the turbocharger configured to be driven via exhaust gas from an engine during a turbocharger mode and via the exhaust gas from the engine and mechanical output from the engine during a supercharger mode. The engine system further includes a bypass control element to decrease an amount of energy extracted from exhaust flow through the turbine in a regeneration mode of operation and to increase an amount of energy extracted from exhaust flow through the turbine during a non-regeneration mode of operation, and an aftertreatment system disposed downstream of the turbocharger and including a particulate filter.

Abstract: A method for providing air to a combustion chamber of an engine, the engine including a compressor and a boost tank selectably coupled to an intake manifold. The method includes varying a relative amount of engine exhaust in air pressurized in the boost tank based on engine operating conditions, and discharging the air pressurized in the boost tank to the intake manifold.

Abstract: Systems and methods for controlling compressor inlet flow in a turbocharger of an engine are described. In one example, a method for controlling a compressor inlet flow of an engine turbocharger system comprises: directing air from a high pressure source to an inlet upstream of a compressor wheel via a conduit coupled to the inlet and the high pressure source, where the conduit is obliquely coupled to the inlet.

Abstract: An exhaust gas turbocharger module and internal combustion engine outfitted therewith are disclosed. The exhaust gas turbocharger modules have an individual turbocharging assembly with a low-pressure exhaust gas turbocharger with a low-pressure turbine and a low-pressure compressor which have a common first turbocharger axis. A high-pressure exhaust gas turbocharger is provided with a high-pressure turbine and a high-pressure compressor which have a common second turbocharger axis extending perpendicular to the first turbocharger axis. The low-pressure turbine is connected downstream of the high-pressure turbine via an exhaust gas connection line, and the high-pressure compressor is connected downstream of the low-pressure compressor via a charge air connection line. A housing receives the low-pressure turbine, the high-pressure turbine and the exhaust gas connection line. The low-pressure compressor, the high-pressure compressor, and the charge air connection line are arranged outside of the housing.

Abstract: A method for providing air to a combustion chamber of an engine, the engine including a compressor and a boost tank selectably coupled to an intake manifold. The method includes varying a relative amount of engine exhaust in air pressurized in the boost tank based on engine operating conditions, and discharging the air pressurized in the boost tank to the intake manifold.

Abstract: A method for controlling emissions during low-load diesel engine operation is provided. The engine includes at least one piston movable in a cylinder between a top dead center and a bottom dead center position, a fuel injector for injecting fuel into the cylinder, and a variable geometry turbine through which exhaust from the engine is adapted to flow. According to the method, the engine is operated at low load, NOx emissions are measured at an exhaust of the engine, and a variable geometry turbine inlet opening size is controlled responsive to NOx emissions measurements so that NOx emission levels are controlled.

Abstract: In an explosion protection for gas a turbine which includes a turbine wheel and a turbine housing surrounding the turbine wheel, wherein the explosion protection comprises a multi-layer structure of material of a high rupture strength, the explosion protection is in the form of an essentially closed pot including a bottom section and a sash extending fully around the bottom section for accommodating the turbine housing.

Abstract: A 3-D geometric separation of old engine compression-ignition-expansion chamber in compression-ignition chamber and expansion chamber with a parametric delay between ignition and expansion ( and excluding the intake valves and exhaust valves) what to permit a symmetric configuration for a totally rotary engine and a special arrangements(as is revealed in drawings and explained in description) of mechanical and electrical components acting resonant with thermodynamic processes against of internal and external absorption's processes using maximal the caloric energy of a combustible and creating a cyclic thermodynamic parametric resonant loop, process maintained from increasing or decreasing the dynamic pressure and thermo gradient and mechanically mirrored in a increasing or decreasing engine RPM or it's new parameter, the ignition timing delay.

Abstract: A method of operating a generator arrangement comprises selecting an operating mode as a function of at least one of: a speed of an engine, a temperature of at least a portion of the engine, a property of an exhaust fluid of the engine, and whether an engine braking command signal is received by the controller; controlling the flow of fluid from a first engine outlet to a first turbine by setting, based on the selected operating mode, an operating condition of a first flow control mechanism, the first turbine being part of a turbocharger having a compressor in fluid flow communication with an engine inlet; and controlling the flow of fluid from a second engine outlet to a second turbine by setting, based on the selected operating mode, an operating condition of a second flow control mechanism, the second turbine being parallel to the first turbine and being part of an electrical generator.

Abstract: Systems and methods for operating a twin flow supercharged engine are provided. The exhaust lines of engine cylinders are grouped into separate manifolds connected to respective inlet ducts of the twin-flow turbine. The inlet ducts of the twin-flow turbine are of different sizes, with different-sized cross sections and/or different-sized exhaust-gas volumes. The exhaust line of a manifold with a smaller exhaust-gas volume is connected to the larger inlet duct, and the exhaust line of a manifold with the larger exhaust-gas volume is connected to the smaller inlet duct.

Abstract: In a radial compressor, particularly of an exhaust gas turbocharger of an internal combustion engine, having a compressor housing within which a compressor wheel is disposed for compressing air from an inflow channel of the compressor housing and directing the air to an outflow channel of the compressor housing, the compressor housing comprising a bypass channel having a first flow opening upstream of an axial compressor wheel inlet and a second flow opening downstream of the compressor wheel inlet, the compressor housing is configured at least in a flow region upstream of the second flow opening in an asymmetric manner with regard to a rotational axis of the compressor wheel.

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 flow control valve which pivots about a point near the entry to the turbine housing. By moving the valve 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 system is disclosed for use with an engine. The system may have an intake manifold configured to direct air into combustion chambers of the engine. The system may also have an auxiliary device and an exhaust manifold configured to direct exhaust from the combustion chambers of the engine through the auxiliary device to the atmosphere. The system may additionally have a conduit associated with fewer than all of the combustion chambers of the engine and extending to the auxiliary device in parallel with the exhaust manifold, and an auxiliary valve disposed within the conduit and selectively movable between a flow-passing position and a flow-blocking position.

Abstract: An internal combustion engine cylinder head is based upon a one-piece structure including a number of exhaust runners, an exhaust collector, and a turbocharger exhaust turbine housing, all formed as one-piece.

Abstract: A method for responding to an existing or incipient surge condition of a turbocharger coupled to an engine of a motor vehicle is provided. The method comprises receiving a signal responsive to an operating condition of the turbocharger and adjusting one or more operating parameters of the motor vehicle when a power of the signal, integrated over a pre-selected range of non-zero frequencies, exceeds a pre-selected threshold. Other embodiments provide related systems for responding to an existing or incipient surge condition of a turbocharger.

Abstract: A method for operating an engine system comprises charging a cylinder of the engine system with exhaust from upstream of an exhaust turbine at a first rate. The method further comprises charging the cylinder with exhaust from downstream of the turbine at a second rate. The exhaust from downstream of the turbine is routed to the cylinder via a low-pressure exhaust-gas recirculation path. The method further comprises increasing the second rate relative to the first rate in response to a coolant-overheating condition.

Abstract: A turbocharger for an internal combustion engine includes a bearing housing with a bearing bore and a semi-floating bearing disposed within the bore. The turbocharger also includes a shaft having a first end and a second end, wherein the shaft is supported by the bearing for rotation about an axis within the bore. The turbocharger also includes a turbine wheel fixed to the shaft proximate to the first end and configured to be rotated about the axis by post-combustion gasses emitted by the engine. Additionally, the turbocharger includes a compressor wheel fixed to the shaft proximate to the second end and configured to pressurize an airflow being received from the ambient for delivery to the engine. Furthermore, the turbocharger includes a plate secured within the bearing housing and configured to prevent rotation of the bearing about the axis. An internal combustion engine employing such a turbocharger is also disclosed.

Abstract: A turbo compound transmission, such as in a heavy duty or medium duty diesel engine, includes a turbo compound turbine to be driven by exhaust gases from an internal combustion engine, and a coupling including a first rotor including a mechanical input drive adapted to be driven by the turbine, and a second rotor including a mechanical output drive. A brake is arranged to brake and limit the rotation of the turbine. The coupling is arranged to decouple when braking with the brake, subjecting the coupling to a torque above a predetermined torque limit. A method for controlling a turbo compound transmission is also disclosed.

Abstract: An apparatus and method for improving vehicle performance by application of pneumatic boost to vehicle engines, including diesel engines having at least one turbocharger supplying air to the engine, in a manner which increases engine torque output while minimizing the potential for exceed various operating limits to the maximum practicable extent. The vehicle's pneumatic booster system controller implements strategies for shaping the rate of the air injection during a boost event, tailoring the air injection to obtain maximum engine torque output while respecting the operating limits, by controlling the timing, duration, quantity and/or injection pattern during a boost event to achieve a refined distribution of compressed air injection over the course of the boost event to provide desired engine torque output and fuel efficiency while minimizing the potential for exceeding a wide variety of operation limits, regulatory, engineering and passenger comfort limits.

Abstract: The present invention relates to a turbocharger (1) for an internal combustion engine (2) comprising at least one exhaust gas recirculation line (3), via which an exhaust gas mixing opening (12) enters into an intake line (10) of the internal combustion engine (2), further comprising a turbine (4) and a compressor (5), which is driveably connected to the turbine (4) and has a compressor impeller (6) that is disposed in a compressor housing (7), into which the intake line (10) empties via a compressor inlet (11), wherein a mixing device (18) is disposed in the intake line (10) between the exhaust gas mixing opening (12) and the compressor inlet (11).

Abstract: Systems and methods are disclosed for compensating a mass airflow (MAF) sensor reading to account for the bleeding or diversion of intake airflow for compressor operation in determining fresh air flow into an engine. The engine is downstream from the compressor diversion.

Abstract: A control unit for a turbocharged internal combustion engine is provided. The control unit includes a first exhaust valve that opens/closes a first exhaust passage that is communicated with a turbine; a second exhaust valve that opens/closes a second exhaust passage that bypasses the turbine; and a closing timing of the second exhaust valve that is controlled so that an opening period of the second exhaust valve overlaps with an opening period of an intake valve under high engine load. The opening characteristic of the second exhaust valve and a fuel injection amount are controlled so that the air-fuel ratio of gas that is filled in a cylinder approximates an output air-fuel ratio and the air-fuel ratio of gas flowing into a three-way catalyst that is arranged in a post-junction exhaust passage approximates a theoretical air-fuel ratio under high engine load.

Abstract: An apparatus and method for improving vehicle performance by application of pneumatic boost to vehicle engines, including diesel engines having at least one turbocharger supplying air to the engine, in a manner which increases engine torque output while minimizing the potential for exceed various operating limits to the maximum practicable extent. The vehicle's pneumatic booster system controller implements strategies for shaping the rate of the air injection during a boost event, tailoring the air injection to obtain maximum engine torque output while respecting the operating limits, by controlling the timing, duration, quantity and/or injection pattern during a boost event to achieve a refined distribution of compressed air injection over the course of the boost event to provide desired engine torque output and fuel efficiency while minimizing the potential for exceeding a wide variety of operation limits, regulatory, engineering and passenger comfort limits.

Abstract: Methods and systems are provided for a boosted engine having a split intake system coupled to a split exhaust system. Aircharges of differing composition, pressure, and temperature may be delivered to the engine through the split intake system at different points of an engine cycle. In this way, boost and EGR benefits may be extended.

Abstract: Provided is an exhaust turbine equipped with an exhaust control valve which can reduce wear of the contact surfaces between the shaft and the bushing or the turbine casing. The exhaust turbine is equipped with the exhaust control valve for opening/closing an exhaust bypass passage leading the exhaust turbine being driven by exhaust gas output from an engine to an exhaust outlet passage while bypassing the exhaust turbine, wherein the exhaust control valve comprises a shaft which is supported rotation-freely by a turbine casing and supports a valve element, an arm equipped with a connecting part with a drive source and turning the shaft about the axis thereof by the reciprocating motion of the connecting part produced by the drive source, and a weight attached to an end on the side opposite to the connecting part with the drive source with respect to the axis of the shaft.

Abstract: Disclosed is a supercharged direct-injection engine, which comprises a supercharging device (25, 30) for compressing intake air, and an injector 10 for directly injecting fuel into a combustion chamber 5. In the engine, an excess air factor ? as a ratio of an actual air-fuel ratio to a stoichiometric air-fuel ratio, at least in an engine warmed-up mode, is set to 2 or more in the entire engine-load region. Further, compressed self-ignited combustion is performed in a low engine-load region, and a supercharging amount by the supercharging device (25, 30) is increased along with an increase in engine load in a high engine-load region to allow the excess air factor ? to be kept at 2 or more. The engine of the present invention can effectively reduce NOx emission, while improving fuel economy.

Abstract: An apparatus and method for improving vehicle performance by application of pneumatic boost to vehicle engines, including diesel engines having at least one turbocharger supplying air to the engine, in a manner which increases engine torque output while minimizing the potential for exceed various operating limits to the maximum practicable extent. The vehicle's pneumatic booster system controller implements strategies for shaping the rate of the air injection during a boost event, tailoring the air injection to obtain maximum engine torque output while respecting the operating limits, by controlling the timing, duration, quantity and/or injection pattern during a boost event to achieve a refined distribution of compressed air injection over the course of the boost event to provide desired engine torque output and fuel efficiency while minimizing the potential for exceeding a wide variety of operation limits, regulatory, engineering and passenger comfort limits.

Abstract: A supercharging system (6) for an internal combustion engine includes a turbo charging device with a turbine (7) and a compressor (8), the compressor having a compressor shaft (8a); a planetary gear (25) coupled to the compressor shaft (8a) and a drive shaft (32); a clutch unit (18); a power transmission for connecting a crank shaft (4) of the combustion engine (1) to the drive shaft (32) via the clutch unit (18); and an electric motor or electric generator (20) connected to the drive shaft (32). The compressor shaft (8a) is at least on one end movably arranged between the compressor (8) and the planetary gear (25) to allow relative movements between the compressor (8) and the planetary gear (25).

Abstract: A central turbocharger configuration in a V-engine with two turbochargers is described. In one example approach, a V-engine includes first and second in-board exhaust manifolds; first and second turbines coupled to the first and second manifolds, respectively; and a passage intermediate to and coupling outlets of the first and second turbines; and a junction branching from the passage downward into the valley.

Abstract: A device for controlling the exhaust-gas turbocharging of an internal combustion engine having an exhaust-gas turbocharging device, has an estimated value unit for determining a mass flow through a turbine system, a regulating unit for determining a regulating exhaust-gas back pressure as a function of a nominal charge pressure and an actual charge pressure, and also a unit for generating at least one actuating signal for at least one actuator of the turbine system as a function of the regulating exhaust-gas back pressure and of the mass flow through the turbine system, wherein the estimated value unit has a turbine system model for determining an estimated overall efficiency of the turbine system and a model for determining an estimated overall efficiency of a compressor system having at least two compressors, and wherein the regulating unit is set up to determine the regulating exhaust-gas back pressure using the estimated overall efficiencies

Abstract: A detection circuit for providing indications of a rotational speed and a temperature of a supercharging system for an internal combustion engine is provided, which detection circuit includes: a rotational speed sensor for providing a periodic detection signal having a frequency dependent on a rotational speed in the supercharging system; a temperature sensor for detecting a temperature in the supercharging system; and a modification unit for providing a periodic output signal having a periodicity dependent on the periodic detection signal, and for setting a time length of a signal pulse of the periodic output signal as a function of the detected temperature, so that the periodic output signal provides the rotational speed indication by its periodicity and the temperature indication by the time length of the signal pulse.

Abstract: A device for exhaust-gas treatment near an engine includes an annular structure and a guide structure disposed in an exhaust line. An inner wall forms an inner flow passage and an outer flow passage in the annular structure. The inner wall and the guide structure form a gap in such a way that only a limited secondary flow of the exhaust gas is conducted through the inner flow passage. A motor vehicle having the device is also provided.

Abstract: In one exemplary embodiment of the invention, a method for controlling exhaust gas temperature in an exhaust system includes determining a flow rate of an exhaust gas received by the exhaust system, determining a temperature of the exhaust gas and determining a specific heat for the exhaust gas. The method also includes determining an amount of energy required to attain a desired temperature for the exhaust gas entering an exhaust device, wherein the amount of energy is based on the determined flow rate, temperature and specific heat for the exhaust gas and communicating a signal to control at least one of a fuel flow rate or an air flow rate based on the determined amount of energy.