Abstract: A method operates a particulate filter through which exhaust gas can flow in a vehicle, in which ash is introduced into a filter body of the particulate filter, wherein at least one ash former or at least one ash component is arranged on at least one carrier material upstream of the filter body in the direction of flow of the exhaust gas.

Abstract: An actuator includes an electric motor, an output shaft and an output lever. The output lever is fixed to one end portion of the output shaft, which is located at an outside of a housing. The output lever includes a cylindrical hole, through which a cylindrical portion of the output shaft is received, and a cutout, which is radially outwardly recessed from the cylindrical hole. A part of an inner wall surface of the cutout, which is connected to an inner wall surface of the cylindrical hole, is defined as a root corner. The root corner is shaped in a convex curved surface form in a view taken in an axial direction of the cylindrical hole.

Abstract: A method for controlling an exhaust aftertreatment system for vehicles includes: determining, by a controller, whether or not a designated regeneration operation is finished; accumulating, by the controller, a first amount of NOx emission measured by a rear end NOx sensor of an selective catalytic reduction (SCR) apparatus and a second amount of NOx emission calculated by an NOx emission amount model respectively for a first reference period of time immediately after the regeneration operation is finished; determining, by the controller, whether or not a difference between an accumulated value of the first amount of NOx emission and an accumulated value of the second amount of NOx emission exceeds a reference value when the first reference period of time has elapsed; and correcting, by the controller, a model purification efficiency using a sensor purification efficiency when the difference between the accumulated values exceeds the reference value.

Abstract: A method is provided for ascertaining a NOx concentration and an NH3 slip downstream from an SCR catalytic converter of an internal combustion engine of a vehicle. State variables of an internal combustion engine as first input variables and an updated NH3 fill level of the SCR catalytic converter as a second input variable cooperate with at least one machine learning algorithm or at least one stochastic model. The at least one machine learning algorithm or at least one stochastic model calculates the NOx concentration and the NH3 slip downstream from the SCR catalytic converter as a function of the first input variables and the second input variables and output the same as output variables.

Abstract: A vehicle engine system includes an internal combustion engine, an air induction system configured to supply intake air to the internal combustion engine, and an evaporative emissions control (EVAP) system is configured to selectively supply purge fuel vapor to the EHC for subsequent combustion and rapid heating to a predetermined catalyst light-off temperature. The system additionally includes a booster configured to charge the intake air, and an engine bypass conduit fluidly coupled between the booster and the exhaust aftertreatment system. When the internal combustion engine is off, the booster selectively supplies a flow of intake air through the engine bypass conduit to the exhaust aftertreatment system. The flow of intake air draws purge fuel vapor from the EVAP system into the exhaust aftertreatment system.

Abstract: According to the invention, a method and system for estimating fresh air flow into a turbocharged engine (105) is provided. A controller (109) arranged to determine an actual fresh air mass flow in subsequent time frames by measuring, in an actual time frame, a pressure drop over a compressor (101) and using a first calculated fresh air mass flow as a starting value for deriving a second fresh air mass flow in said time frame from a compressor model using the measured pressure drop and a compressor rotational speed. In a previous time frame, before said actual time frame, a pressure drop is measured over an air treatment device. A pressure drop is estimated over the air treatment device (103, 104, 106, 108) using the second fresh air mass flow and an estimated flow resistance of the air treatment device.

Abstract: Centralizing the handling and manipulating of vaporization medium to a single subsystem that supplies multiple ammonia vaporizers allows for efficient and effective production of a corresponding vaporized ammonia stream containing a controlled quantity of ammonia. These vaporized ammonia streams can then be used in conjunction with ammonia-consuming devices to reduce NOx in NOx-containing exhaust streams from multiple furnaces.

Abstract: Various systems are provided for a charge-air cooler system. In one example, a system includes a turbocharger system having at least one compressor and one turbine and configured to provide charge air to an engine. The system also includes a charge-air cooler system having at least one charge-air cooler arranged below the at least one compressor, a turbocharger bracket arranged directly below the charge-air cooler system and shaped to mount the charge-air cooler and the turbocharger system to the engine, and a stator adapter physically coupling an alternator to the engine. The stator adapter includes an accessibility window arranged below the charge-air cooler system. The at least one charge-air cooler is closer to the accessibility window than the turbocharger system.

Abstract: A selective catalytic reduction system control system (10) and method of its use include an ammonia (“NH3”) slip sensor (13) located within an interior space (27) of an exhaust stack (15) of a selective catalytic reactor (31), toward an inlet end (25) of the stack (15); a housing (17) located within the interior space of the exhaust stack; the housing including face panels 19; a nitrogen oxides (“NOx”) sensor (11) contained within an interior space (29) defined by the face panels of the housing, at least two of the face panels (19I, 19O) containing an oxidation catalyst; and a dosing controller (59) in communication with the NH3 and NOx sensors, the dosing controller including a microprocessor with dosing logic embedded thereon. The housing with oxidation catalyst acts as a linear box, isolating the NOx sensor from NH3 slip, linearizing the NOx sensor signal.

Abstract: An exhaust passage includes a main passage and bypass passage, a catalyst, an exhaust control valve, and an HC adsorbent in the bypass passage. The exhaust control valve is controlled so that, when a temperature of the catalyst is higher than a predetermined sintering occurrence temperature, the quality of HC desorbed from the HC adsorbent is greater when the air-fuel ratio of the exhaust gas flowing through the upstream exhaust passage portion is a lean air-fuel ratio compared to when it is a stoichiometric air-fuel ratio or rich air-fuel ratio, or the quality of HC desorbed from the HC adsorbent is greater when the air-fuel ratio of the exhaust gas flowing through the upstream exhaust passage portion is a larger lean air-fuel ratio compared to when it is a smaller lean air-fuel ratio.

Abstract: An exhaust system is provided to an engine having an output shaft extending in a vehicle front-and-rear direction. The system includes an exhaust passage including a first passage part extending forward from a turbine housing of a turbocharger, a fourth passage part extending in the front-and-rear direction below the turbine housing, a second passage part disposed so that it extends vertically and its center axis inclines forward and upward, and a third passage part having a downstream connecting part extending forward from a front end of the fourth passage part, and an upstream connecting part extending forward and upward from an upper part of a front end of the downstream connecting part. The downstream part has, at a lower part of its front end, an attaching part extending downwardly from a lower edge of the upstream part, and to which a sensor or an injector is attached.

Abstract: An adaptive urea mixer comprises a housing (1) and a first movable plate (2), a second movable plate (3), and a first fixed ring (4) sequentially provided in a direction from an air inlet to an air outlet in the housing. The first fixed ring (4) is fixedly connected to an inner side wall of the housing (1). A plurality of guide columns (9) are provided on the first fixed ring (4). A first position-limiting portion and a second position-limiting portion are provided on the guide column (9). The first movable plate and the second movable plate are sleeved on the guide column (9). A first elastic support element (12) is sleeved on the guide column (9) between the second position-limiting portion (11) and the first movable plate (2), and a second elastic support element (13) is sleeved on the guide column (9) between the first fixed ring (4) and the second movable plate (3). Both a first flow guide plate and a second flow guide plate are fixedly connected to the first fixed ring (4).

Abstract: An exhaust system provided to an engine having an output shaft extending in a specific direction, includes an exhaust passage, a turbocharger having a turbine housing, and purifying parts. The exhaust passage includes a first passage part extending to one side in the specific direction from the turbine housing, a third passage part extending in the specific direction below the turbine housing, and a second passage part extending upward from one end part of the third passage part in the specific direction. A center axis of the second passage part inclines so that an upper end thereof is located on one side of a lower end in the specific direction. The first passage part has in an upper surface thereof an inclined part to which one of a sensor configured to detect a property of exhaust gas and an injector configured to inject fluid into exhaust gas, is attached.

Abstract: An exhaust gas control apparatus includes an SCR catalyst arranged in an exhaust passage, a heating device that heats the SCR catalyst, a urea solution supply device that supplies a urea solution to an upstream side of the SCR catalyst, a controller that operates the heating device and the urea solution supply device, and at least one sensor that acquires information related to a state of the exhaust gas control apparatus. The controller executes a state determination process for determining whether the exhaust gas control apparatus is currently in a predetermined state in which ammonia is not adsorbable on the SCR catalyst based on the information from the at least one sensor, and a heating avoidance process for avoiding heating the SCR catalyst with the heating device irrespective of an operating condition of the internal combustion engine when the exhaust gas control apparatus is currently in the predetermined state.

Abstract: Disclosed is a method for diagnosing functionality of dosing units of a fluid dosing system comprising at least two dosing units, a tank unit for holding a fluid, and a pump unit for pressurizing the fluid for the dosing units. The method comprises determining a first hydraulic stiffness value on the basis of first pressure variations and determining a second hydraulic stiffness value on the basis of said second pressure variations. The first hydraulic stiffness value and second hydraulic stiffness value are compared. In a case where the first hydraulic stiffness value and second hydraulic stiffness value differ to a certain extent, concluding that malfunction of at least one of said dosing units is at hand, and in a case where the first hydraulic stiffness value and the second hydraulic stiffness value do not differ to said certain extent, concluding that the first and second dosing units function as intended.

Abstract: A control device comprises a catalyst warmup control part configured to supply electric power to a conductive base to warm up a catalyst device. The catalyst warmup control part is provided with a first estimating part configured to estimate a temperature of the conductive base based on an engine operating state, a second estimating part configured to estimate a temperature of the conductive base based on a resistance value of the conductive base detected when supplying current to the conductive base, and an electric power control part configured to control an amount of electric power supplied to the conductive base when warming up the catalyst device based on a result of comparison of magnitudes of a first estimated temperature of the conductive base estimated by the first estimating part and a second estimated temperature of the conductive base estimated by the second estimating part.

Abstract: An exhaust gas treatment system (1) comprises a catalyst article (5) for the treatment of an exhaust gas, the catalyst article (5) comprising a non-metallic substrate (20) comprising a plurality of catalytically-active transition-metal-doped iron oxide magnetic particles (45), and an inductive heater (70) for inductively heating the plurality of catalytically-active magnetic particles by applying an alternating magnetic field.

Abstract: Methods and systems for operating an engine with a pump that is driven via the engine are described. In one example, start of opening of an injector that supplies a fluid to an engine exhaust system is timed based on a period of the pump so that the output of the fluid injector may be repeatable in the presence of fluid pressure oscillations that are periodic with pump rotation.

Abstract: A method of manufacturing an on-board diagnostic (OBD) limit part and a method of testing to evaluate an OBD system. The method of manufacturing the OBD limit part includes introducing a contaminant to an selective catalytic reduction (SCR) catalyst and contacting the contaminant with the SCR catalyst for a selected period of time. The method of manufacturing utilizes a vessel, the contaminant, and the SCR catalyst. The OBD limit part is a combination of the contaminant and the SCR catalyst within the vessel. The method of testing to evaluate the OBD system includes collecting data related to an exhaust gas before and after the exhaust gas is exposed to the OBD limit part, collecting an indication provided by the OBD system, and comparing the data related to the exhaust gas and the indication provided by the OBD system. The method of testing to evaluate the OBD system utilizes a system that includes an exhaust gas source, a first and a second fluid path, the OBD limit part, and the OBD system.

Abstract: An injector includes an injector body having an upper portion defining a top surface. An injector core is received through the upper portion. The injector core has an interfacing surface that is disposed adjacent and raised with respect to the top surface. A cover member is disposed on the upper portion of the injector body. The cover member has a top wall for receiving at least a portion of the injector core, a side wall extending from at least a portion of the top wall, and a lip that is adapted to be attached to the other of the side wall or the injector body through a snap-fit connection. Upon attachment of the lip to the other of the side wall or the injector body, the top wall of the cover member presses on the interfacing surface of the injector core to restrict an axial movement of the injector core relative to the injector body along the longitudinal axis.