Abstract: A system comprises a tank header configured to couple to a reductant tank and a heating mechanism positioned proximate to the tank header. The heating mechanism is configured to heat at least a portion of the tank header. The system may further comprise a conduit configured to pass reductant from the reductant tank and a junction configured to receive reductant from the reductant tank.

Abstract: The present disclosure provides a method of treating a diesel exhaust system that includes heating a reagent to a temperature such that at least a portion of the reagent is heated to a gaseous phase, injecting the reagent into a diesel exhaust stream upstream of a catalyst, and reacting the diesel exhaust with the heated reagent over the catalyst to convert NOx into N2 and H2O. The heating modulates a mass flow rate of the reagent by converting a state of matter of the reagent at least partially to the gaseous phase prior to or after being injected, and the heated reagent in the gaseous form reduces deposit formations within the diesel exhaust system.

Abstract: A reductant insertion system for inserting reductant into an aftertreatment system via a reductant injector comprises a reductant insertion assembly comprising a pump operatively coupled to the reductant injector via a reductant delivery line. A compressed gas source is operatively coupled to the reductant injector and provides a compressed gas to the reductant injector for gas assisted delivery of the reductant. A controller is operatively coupled to the compressed gas source and the reductant insertion assembly and configured to determine whether there is a reductant demand for the reductant. In response to there being no reductant demand, the controller stops the pump and activates the compressed gas source for a predetermined time so as to provide compressed gas to the reductant injector at a pressure sufficient to force reductant contained in the reductant injector upstream towards the reductant insertion assembly via the reductant delivery line while the pump is stopped.

Abstract: An after treatment system for a lean-burn engine is disclosed. The after treatment system is sequentially equipped with an ammonia production catalyst module, a selective catalytic reduction (SCR) catalyst, and a CO clean-up catalyst (CUC) on an exhaust pipe through which an exhaust gas flows and which is connected to a lean-burn engine. An exhaust flow changer is disposed between the ammonia production catalyst module and the SCR catalyst. The exhaust flow changer changes flow of an exhaust gas discharged from the ammonia production catalyst module according to a temperature of the SCR catalyst.

Abstract: An eccentric screw pump, comprising a rotor that extends along a longitudinal axis of the rotor from a drive end to a free end, a stator housing with an internal cavity that extends along the longitudinal axis from a stator inlet opening to a stator outlet opening and that is designed to accommodate the rotor, a drive motor with a drive shaft that is coupled with the rotor to transmit a torque, a first cardan joint which is placed within the transmission of the torque between the drive shaft and the rotor, and a stator outlet flange that is arranged in flow direction behind the rotor. The stator outlet flange comprises a flange connection plane that is oriented non-vertically to the longitudinal axis.

Abstract: The invention relates to a method for regenerating a particle filter in an exhaust system of an internal combustion engine, comprising at least the following steps: a) performing a first regeneration of the particle filter until a lower threshold value of a particle load of the particle filter is reached; b) performing a verification measurement, wherein the internal combustion engine is operated at a first operating point such that an exhaust gas having at least—an excess of oxygen or—an elevated first temperature is provided upstream of the particle filter; wherein, if an increase of a second temperature is detected downstream of the particle filter during or after step b), c) a second regeneration of the particle filter is initiated.

Abstract: A selective catalytic reduction (SCR) system is disclosed. The SCR system may include a mixing tube with a mixing tube inlet; a diesel exhaust fluid (DEF) injector proximate to the mixing tube inlet; and a flow control device proximate to the mixing tube inlet, wherein the flow control device is positioned within the mixing tube or affixed to the mixing tube inlet, and wherein the flow control device includes a plurality of vanes arranged around a center of the flow control device.

Abstract: An apparatus includes an engine module, an in-cylinder content module, and an engine out NOx module. The engine module is structured to interpret engine in-cylinder data regarding an operating condition within a cylinder of an engine, wherein the engine in-cylinder data includes an engine torque, an engine speed, a rail pressure, and a start-of-injection. The in-cylinder content module is structured to interpret at least one additional in-cylinder data point regarding the operating condition within the cylinder of the engine. The engine out NOx module is structured to determine an engine out NOx amount responsive to the engine in-cylinder data and the at least one additional in-cylinder data point.

Abstract: An exhaust purification system of an internal combustion engine 1 comprises: a filter 29 arranged in an exhaust passage of the internal combustion engine and trapping particulate matter contained in exhaust gas, a catalyst 28 arranged in the exhaust passage at an upstream side from the filter in a direction of exhaust flow or supported on the filter, a fuel feed device 3, 35 feeding fuel to the catalyst, and a control device 80 configured to control the feed of fuel by the fuel feed device. The control device is configured to feed fuel from the fuel feed device to the catalyst so as to burn off particulate matter trapped at the filter as processing for filter regeneration, and feed liquid state fuel from the fuel feed device to the catalyst after the processing for filter regeneration.

Abstract: A diesel exhaust fluid (DEF) system and a method of controlling the DEF system are disclosed. The method may include determining that a shutdown condition of the DEF system is satisfied; providing a control signal to open a valve of a buffer tank of the DEF system based on determining that the shutdown condition of the DEF system is satisfied; determining that a level of DEF remaining in the buffer tank satisfies a threshold; and closing the valve of the buffer tank based on the level of DEF remaining in the buffer tank satisfying the threshold.

Abstract: Diesel Exhaust Fluid is metered into an engine exhaust gas aftertreatment system having a close coupled SCR catalyst and a main SCR catalyst. The DEF is injected into two injector locations, one upstream of the close coupled SCR catalyst and another upstream of the main SCR catalyst, the quantity of DEF in each injector being based on primarily the temperature at the main SCR catalyst and the mass flow of the NOx through the aftertreatment system. This method of injection enables a relatively better fuel economy outcome while meeting the regulated tailpipe NOx emission levels and the N2O formation limits.

Abstract: A exhaust-gas heat management system includes a catalytic converter in the exhaust-gas train of an internal-combustion engine, a cover enclosing the catalytic converter, and thereby realizing a cavity for holding a latent-heat storage PCM, at least two fluid connections between the cavity and the collecting vessel, and a pump device for activating and deactivating a PCM circuit between the cavity and the collecting vessel by means of the fluid connections. A method comprises determining an operating state of the internal combustion engine, determining the catalytic converter temperature, determining the PCM temperature, activating the PCM circuit if the PCM temperature is above a phase transition temperature of the PCM, and the internal combustion engine is in a switched-on operating state or the internal combustion engine is in a switched-off operating state and the catalytic converter temperature is below a light-off temperature of the catalytic converter.

Abstract: A purification method comprises providing a purification device comprising at least one exhaust gas purification member having an upstream surface through which the exhaust gas enters the purification member and a downstream surface through which the exhaust gases exit the purification member. The method further includes, in the absence of forced circulation of the exhaust gas through the purification member by an engine of the vehicle, heating radiatively at least either the upstream zone or the downstream zone, for example before starting the engine of the vehicle.

Abstract: An aftertreatment system includes an exhaust reductant tank configured to store an exhaust reductant. A filter is fluidically coupled to the exhaust reductant tank. The aftertreatment system includes a hydrocarbon detection device configured to indicate the presence of a hydrocarbon in the exhaust reductant. A catalyst is included in the system and configured to treat the exhaust reductant flowing through the system. The hydrocarbon detection device can include a hydrophobic paper, and can be disposed in the filter.

Abstract: An after treatment method is disclosed. The after treatment method may include: operating an engine at a lean air/fuel ratio; calculating an amount of NH3 stored in an SCR catalyst; calculating an amount of NOx which will flow into the SCR catalyst; determining whether conversion to a rich air/fuel ratio is desired; calculating, when the conversion to the rich air/fuel ratio is desired, a rich duration for which the rich air/fuel ratio is maintained and a target air/fuel ratio; and operating the engine at the target air/fuel ratio for the rich duration.

Abstract: An injection device for metering a fluid, having the following: a valve, which has a valve needle and a valve seat; a nozzle shaft, which surrounds the valve needle and which holds a volume of the fluid; and an inlet chamber, which adjoins the nozzle shaft on the side of the nozzle shaft facing away from the valve and which has a flow connection to the nozzle shaft. The injection device has at least one compressible volume compensation element, which is filled with a gas and which, within the injection device, is in contact with the fluid.

Abstract: Methods and systems are provided for regenerating an exhaust particulate filter based on a projected vehicle drive cycle and catalyst ammonia storage level. In one example, a method may include scheduling a PF regeneration during a regeneration window to maintain a threshold ammonia level in an exhaust catalyst, at the end of the drive cycle.

Abstract: A tubing for a fluid medium of motor vehicles, particularly for an aqueous urea solution, comprises a tube and a connector arranged on one tube end of the tube. The connector has a connecting part, a heating wire, and a housing which encloses the connecting part and the heating wire. The connecting part comprises a retaining element for an engaging connection of a plug that can be plugged into the connecting part. The heating wire extends at least from the connecting end associated with the tube end into the intermediate section, wherein at least along the intermediate section of the connecting part, the connector is preferably free of alignment elements arranged in or on the connecting part and used for aligning the heating wire.

Abstract: An exhaust gas controller for an engine is equipped to appropriately regenerate a filter while restraining a deterioration in fuel efficiency. An oxidation catalyst and a filter capable of collecting particles in an exhaust passage, such that a regenerative injection in which fuel is injected for regenerating the filter is performed, even when a main injection is stopped. Under a first operating condition, in which the main injection is performed and a regeneration condition for the filter is satisfied, the regenerative injection is performed after the main injection. Under a second operating condition, in which the main injection is stopped and the regeneration condition for the filter is satisfied, a fuel injector is controlled to perform a former injection Q1 during a compression stroke and latter injections Q2, Q3 during an expansion stroke, as the regenerative injection.

Abstract: Apparatuses, systems, and methods are disclosed for emissions control. An emissions monitor module measures at least one pollutant level for an exhaust gas flow produced by a combustion source and treated by a pollution control device. The at least one pollutant level may be controllable based on at least one combustion source operating parameter and at least one pollution control device operating parameter. A control module controls the at least one combustion source operating parameter and the at least one pollution control device operating parameter based on the at least one measured pollutant level.