Abstract: A method for controlling a regeneration procedure in an exhaust system after treatment device in a vehicle, the method comprising: determining a location of the vehicle, obtaining data related to the location, determining, based on the data related to the location a probability of completing the regeneration procedure on the vehicle at said determined location, controlling the vehicle to perform the regeneration procedure in dependence on the probability of completing the regeneration procedure.

Abstract: A system of controlling ammonia levels in a catalytic exhaust system comprising: means to provide a target value for ammonia slip/ammonia output from said system or a catalytic unit of said system; first comparison means to compare said target value with a feedback value to provide a command value based on said comparison, and means to control the dosing of a reducing agent such as urea into said exhaust system based on said command value; means to input said command value to a transfer function or model to provide an estimated value of ammonia slip/ammonia output from said catalytic unit/system; means to measure actual ammonia slip/ammonia output from said unit/system; second comparison means to compare said actual value with said estimated value; means to provide said feedback value based on the output from said comparison means.

Abstract: An internal combustion engine including a urea-water solution injection in the exhaust system, includes at least one urea-water solution tank, at least one pump, at least one intake line leading to the pump, at least one urea-water solution metering valve which is connected to the pump with the aid of a pressure line, and at least one return line which leads from the pump to the urea-water solution tank and at whose end opposite to the pump a filter element is situated, as well as at least one urea-water solution sensor situated in the urea-water solution tank.

Abstract: The disclosure relates to a method of operating a drive of a mining machine, in particular of a mining excavator, a mining loader, or a mining tipper, comprising at least one diesel engine and at least one exhaust gas purification device. The disclosure is further directed to a corresponding mining machine that can be operated in accordance with the method.

Abstract: A method and an exhaust treatment system are provided for treatment of an exhaust stream comprising nitrogen oxides. The method comprises a first oxidation of compounds comprising one or more of nitrogen, carbon and hydrogen in the exhaust stream; a determination of a value for a ratio between a first amount of nitrogen dioxide and a first amount of nitrogen oxides after the first oxidation; and a first supply of a first additive into the exhaust stream, which is actively controlled based on the determined value for the ratio. Subsequently, a first reduction of at least the first amount of nitrogen oxides is carried out through a catalytic reaction in a catalytic filter, which consists of a particulate filter with an at least partly catalytic coating with reduction characteristics, and is arranged to catch and oxidize soot particles, and to carry out the first reduction of the first amount of nitrogen oxides.

Abstract: A filter regeneration system for an internal combustion engine, the filter regeneration system including: a calculation unit configured to calculate a minimum oxygen concentration and a minimum nitrogen dioxide concentration at which a passive regeneration reaction, in which carbon in PM accumulated on a filter arranged in an exhaust gas passage of the internal combustion engine reacts with nitrogen dioxide and oxygen to generate carbon dioxide and nitrogen monoxide, occurs based on an amount of the PM accumulated on the filter; and an exhaust gas temperature control unit configured to, in a case where an oxygen concentration and a nitrogen dioxide concentration in exhaust gas on an upstream of the filter are equal to or higher than the minimum oxygen concentration and the minimum nitrogen dioxide concentration, respectively, control a temperature of exhaust gas flowing into the filter within a temperature range in which the passive regeneration reaction occurs preferentially.

Abstract: A particle filter for treating exhaust gases includes an SCR catalyst that, when in the presence of a reductant such as ammonia, promotes selective catalytic reduction of NOx; an active oxidation catalyst that promotes oxidation of hydrocarbons and carbon monoxide; and an oxygen storage catalyst that alternately stores and releases oxygen, enhances soot oxidation, and stores NOx at temperatures below optimal SCR functioning. The particle filter may be included in a system having an oxidation catalytic device (OCD) upstream of the particle filter, and optionally includes one or more SCR converters upstream and/or downstream of the particle filter, and/or an ammonia slip catalyst downstream of the particle filter. The system may further be adapted for operation under a high frequency injection fuel control with an OCD having substantial NOx storage material content, or an NSC for improving the efficiency tradeoffs between soot oxidation during filter regeneration and NOx reduction.

Abstract: The NOx catalyst is irradiated with an electromagnetic wave, a resonance frequency and a ratio of a reception power to an oscillation power at the time of the irradiation are detected, and an upper limit value of a change amount of the resonance frequency or an upper limit value of a change amount of the ratio at which the NOx catalyst is diagnosed to be abnormal is determined from a change amount of the resonance frequency and a change amount of the ratio until water is adsorbed on all acid sites included in the NOx catalyst, and a change amount of the resonance frequency and a change amount of the ratio until ammonia is adsorbed on all acid sites included in the NOx catalyst, when it is supposed that the NOx catalyst is in a state of being on the borderline between normal and abnormal.

Abstract: An object of the disclosure is to prevent the sensing accuracy of an exhaust gas sensor from being deteriorated by the effect of electromagnetic waves in an exhaust gas purification system for an internal combustion engine that is configured to apply electromagnetic waves to the exhaust gas purification device provided in an exhaust passage of the internal combustion engine. The disclosure is applied to an exhaust gas purification system for an internal combustion engine including an exhaust gas sensor located within the range of radiation of electromagnetic waves from a radiating device that radiates electromagnetic waves of a specific frequency to an exhaust gas purification device. The system suspends the radiation of electromagnetic waves from the radiating device during a sampling period in which sampling of the output value of the exhaust gas sensor is performed, even when a specific condition for performing the radiation is met.

Abstract: A co-catalyst system for the removal of NOx from an exhaust gas stream has a layered oxide and a spinel of formula Ni0.15Co0.85CoAlO4. The system converts to nitric oxide to nitrogen gas with high product specificity. The layered oxide is configured to convert NOx in the exhaust gas stream to an N2O intermediate, and the spinel is configured to convert the N2O intermediate to N2.

Abstract: Methods and systems are provided for treatment of an exhaust stream, comprising nitrogen oxides. The method comprises a first oxidation of compounds comprising one or more of nitrogen, carbon and hydrogen in the exhaust stream; and a control of a first supply of a first additive to the exhaust stream to prevent an accumulation of soot exceeding a soot threshold value in a catalytic filter. This soot threshold value depends at least on operating conditions for the combustion engine, which impact a level of a flow for the exhaust stream. A first reduction of nitrogen oxides is performed using reduction characteristics of a catalytic coating in the catalytic filter and the supplied first additive. Soot particles are caught and oxidized. A control of a second supply of a second additive is performed, following which a second reduction of nitrogen oxides is performed using the first and/or the second additive in a reduction catalyst device.

Abstract: An object of the disclosure is to prevent the sensing accuracy of an exhaust gas sensor from being deteriorated by the effect of electromagnetic waves in an exhaust gas purification system for an internal combustion engine that is configured to apply electromagnetic waves to the exhaust gas purification device provided in an exhaust passage of the internal combustion engine. The disclosure is applied to an exhaust gas purification system for an internal combustion engine including an exhaust gas sensor located within the range of radiation of electromagnetic waves from a radiating device that radiates electromagnetic waves of a specific frequency to an exhaust gas purification device. The system suspends the radiation of electromagnetic waves from the radiating device during a sampling period in which sampling of the output value of the exhaust gas sensor is performed, even when a specific condition for performing the radiation is met.

Abstract: A control device (40) is connected to a differential pressure sensor (41), a navigation system (42), and a fuel injection valve (17). The control device (40) is configured to: execute a regeneration control of monitoring a purification situation (C1) and supplying unburned fuel (F2), which is injected from the fuel injection valve (17) and does not contribute to driving, to an exhaust gas purification system (20) in a case where the purification situation (C1) becomes a deteriorated situation (Ca); and execute a control of monitoring a road situation (C2) and stopping the regeneration control before the road situation (C2) actually becomes an accelerator off situation (Cb) in which an accelerator opening degree (?1) of an accelerator pedal (43) becomes off.

Abstract: A mixer mixes exhaust gas (A) flowing in an exhaust gas-carrying duct of an internal combustion engine with reactant (R) injected into the exhaust gas-carrying duct. The mixer includes a mixer body (26) with a reactant-receiving duct (32) as well as a releasing device (36) with a releasing duct (34). The releasing device adjoins the reactant-receiving duct (32) in a transition area (42) and leads away from the reactant-receiving duct. The releasing device (36) has an asymmetric configuration in relation to a longitudinal axis (LR) of the reactant-receiving duct.

Abstract: A mixing device for an exhaust system of an internal combustion engine includes a mixing section (14) with a mixing section inlet area (20) to be positioned downstream in relation to a reactant introduction device (12). A mixing section outlet area (22) is positioned upstream in relation to a catalytic converter device (16). The mixing section (14) includes an inner wall (26) surrounding an inner volume (28), through which exhaust gas (A) or/and reactant (R) can flow, and an outer wall (24) surrounding the inner wall (26). An outer volume (30) surrounds the inner volume (28) in a ring-shape, formed between the inner wall and the outer wall (24). An electrically energizable heating device (34) is provided at the inner wall (26), or/and a heat transfer rib formation (54) is provided at the inner wall (26).

Abstract: An exhaust aftertreatment system includes a diesel oxidation catalyst in exhaust gas receiving communication with an engine. A selective catalytic reduction catalyst on filter (SCR on filter) is positioned downstream of the diesel oxidation catalyst. A hydrocarbon doser is configured to inject hydrocarbons into a flow of the exhaust gas upstream of the diesel oxidation catalyst. A reductant doser is configured to inject reductant into the flow of the exhaust gas upstream of the SCR on filter and downstream of the diesel oxidation catalyst. An aftertreatment controller is operatively coupled to the hydrocarbon doser. The aftertreatment controller is configured to control a dosing rate at which the hydrocarbon doser injects hydrocarbons into the flow of the exhaust gas so as to cause regeneration of the SCR on filter.

Abstract: An apparatus for generating a laminar flow includes an injection nozzle and a suction nozzle. The injection nozzle and the suction nozzle are operable to form the laminar flow for blocking particles from contacting a proximate surface of an object. The injection nozzle includes a main outlet to blow out the laminar flow. The injection nozzle is configured to generate a Coanda flow along an external surface of the injection nozzle. The suction nozzle is configured to provide a gas pressure gradient for the laminar flow.

Abstract: A reducing agent supply device includes a tank, an adding valve, a pump, and an electronic control unit. The adding valve is configured to receive the reducing agent supplied from the tank and inject the reducing agent. The pump is configured to send the reducing agent from the tank and suction the reducing agent back into the tank. The electronic control unit is configured to open the adding valve and suction the reducing agent back into the tank as a purge control when the internal combustion engine is commanded to stop. The electronic control unit is configured to increase an amount of a return suction of the reducing agent during the purge control as an amount of the reducing agent, remaining in a supply path and the adding valve when the stop command is given, increases.

Abstract: A tank system for a reducing agent includes: a vessel storing the reducing agent and having: an upper vessel wall, lateral vessel walls, a lower vessel wall forming a base of the vessel, a base region of the vessel having at least one opening, and an outer side of the vessel; and a conveying device, arranged on the outer side of the vessel, that provides the reducing agent under pressure to exhaust gas. The conveying device is disposed on the outer side of the vessel such that the conveying device, with the outer side of the vessel, forms a space S outside the vessel. The space S, by the at least one opening, is connected to the vessel interior allowing the reducing agent to flow from the interior of the vessel into the space S and is suppliable by the conveying device from the space S to the exhaust gas.

Abstract: A method for adjusting a pressure sensor of an SCR system between a delivery pump and a dosing valve, with which the delivery pump is switched off during a switch-off phase of the SCR system and a pressure (pm) measured by the pressure sensor is detected at least during a section of the switch-off phase in which the delivery pump is switched off, and the adjustment of the pressure sensor is carried out by using the measured pressure (pm) as the reference pressure for the pressure sensor.

Abstract: A regeneration compliance system is provided and includes navigation, regeneration, zone and timing modules. The navigation module determines a location of a vehicle. The regeneration module determines a state of a PF of an exhaust system of an engine of the vehicle and whether to regenerate the PF based on the state of the PF. The zone module, based on the location of the vehicle, determines whether the vehicle is in a regeneration permitted zone and where regeneration permitted and prohibited zones are located relative to the vehicle. The timing module estimates time to a next regeneration permitted zone or an amount of time remaining in a current regeneration permitted zone. The regeneration module controls when the PF is regenerated based on (i) the state of the PF, and (ii) the time to the next regeneration permitted zone or the amount of time remaining in the current regeneration permitted zone.

Abstract: An exhaust system for a work vehicle includes a mixer that includes a nozzle configured to receive a first exhaust flow along a lateral axis through a plurality of openings in a peripheral wall of the nozzle. The nozzle also receives a diesel exhaust fluid along a longitudinal axis through a longitudinal inlet. Further, the nozzle is configured to mix the first exhaust flow and the diesel exhaust fluid to form an exhaust solution. In addition, the mixer includes a conduit configured to receive the exhaust solution along the longitudinal axis. Moreover, the conduit has an opening configured to receive a portion of the nozzle, and the conduit is configured to receive a second exhaust flow through a gap formed between the nozzle and the conduit at the opening, and the opening is positioned downstream of the plurality of openings.

Abstract: An aftertreatment system includes: a selective catalytic reduction system including at least one catalyst for decomposing constituents of an exhaust gas produced by an engine, the exhaust gas having a pressure pulsation frequency; an exhaust conduit fluidly coupled to the selective catalytic reduction system and structured to deliver the exhaust gas to the selective catalytic reduction system from the engine; at least one mixer positioned in the exhaust conduit; and a reductant insertion assembly fluidly coupled to the exhaust conduit and structured to insert a reductant into the exhaust conduit upstream of the at least one mixer. The at least one mixer is structured to have a natural frequency matching the pressure pulsation frequency so as to cause resonant vibration in the at least one mixer, the resonant vibration causing reductant deposits to be removed from the at least one mixer.

Abstract: A vehicle propulsion system includes an internal combustion engine with a first combustion chamber and a second combustion chamber, a catalytic converter in an exhaust stream in communication with an exhaust of the internal combustion engine, a gasoline particulate filter in the exhaust stream downstream of the catalytic converter, and a controller in communication with the internal combustion engine. The controller is programmed to determine if a soot loading of the gasoline particulate filter exceeds a predetermined threshold, and adjust a set of engine operating parameters of the internal combustion engine to disable combustion in the first combustion chamber and enrich a fuel mixture in the second combustion chamber if the soot loading in the gasoline particulate filter exceeds the predetermined threshold.

Abstract: A tank system for a reducing agent includes: a vessel configured to store the reducing agent, the vessel having: an upper vessel wall, lateral vessel walls, and a lower vessel wall; and a conveying device, the conveying device being configured to provide the reducing agent under pressure by way of an outlet to an exhaust gas. One or more openings are arranged in the lower vessel wall, the one or more openings forming a connection to a further volume (V) filled with reducing agent. At least one opening of the one or more openings has radially inwardly directed elements arranged on a circumference of the at least one opening.

Abstract: An exhaust after-treatment system that is configured to treat an exhaust produced by an engine, and includes a bypass passage including an inlet for receiving an amount of the exhaust from an exhaust passage. A first exhaust treatment component is located within the bypass passage, and a valve is located proximate the bypass passage that is configured to control the amount of the exhaust that enters the inlet of the bypass passage. A second exhaust treatment component is located in the exhaust passage downstream from the inlet of the bypass passage, wherein an outlet of the bypass passage communicates the exhaust treated by the first exhaust treatment component back to the exhaust passage at a location that is downstream from the second exhaust treatment component such that the exhaust treated by the first exhaust treatment component does not interact with the second exhaust treatment component.

Abstract: An exhaust treatment system comprising: a first dosage device, arranged to supply a first additive into said exhaust stream; a first reduction catalyst device, downstream of said first dosage device arranged for reduction of nitrogen oxides in said exhaust stream through the use of said first additive; a particulate filter, at least partly comprising a catalytically oxidizing coating, which is downstream of said first reduction catalyst device to catch soot particles, and to oxidize one or several of nitrogen oxide and incompletely oxidized carbon compounds in said exhaust stream; a second dosage device, downstream of said particulate filter to supply a second additive into said exhaust stream; and a second reduction catalyst device, downstream of said second dosage device for a reduction of nitrogen oxides in said exhaust stream, with the use of at least one of said first and said second additive.

Abstract: An exhaust gas aftertreatment device for a motor vehicle has an exhaust pipe and a mixing chamber arranged in the exhaust pipe to mix an exhaust gas stream with a reducing agent which can be introduced into the mixing chamber by a dosing device. The mixing chamber has a wall which is on the input side as viewed in a main flow direction of the exhaust gas stream through the exhaust pipe and in which a first inlet for the exhaust gas is formed. The first inlet extends in some regions in a lateral surface region of the input-side wall such that exhaust gas entering the mixing chamber through the first inlet can be set in a rotating motion inside the mixing chamber. The dosing device has an outlet device where a longitudinal axis of the outlet device is inclined towards the main flow direction of the exhaust gas stream.

Abstract: An upstream portion of a communication passage 16 in an exhaust emission control device has a gas gathering chamber 16A encircling and gathering exhaust gas 1 from an exit end of a particulate filter 3 through perpendicular turnabout of the gas 1 and a communication pipe 16B extracting the gas 1 gathered by the chamber 16A through an exhaust outlet 17 into an entry side of a selective reduction catalyst 4. An injector 18 is in the passage 16 to add urea water into the gas flow. The injector 18 is fixed to the chamber 16A in a position opposed to the outlet 17 and in a direction perpendicular to an axis of the filter 3. The outlet 17 of the chamber 16A has a reactor 19 into which the reducing agent injected by the injector 18 is impinged to facilitate gasification of the gas 1.

Abstract: An assembly for reductant dosing error correction in an exhaust aftertreatment system includes an injector comprising a reductant insertion conduit; a pump configured to advance a quantity of dosed fluid reductant from a reductant source; a reductant source outlet defined by the reductant source and configured to release the quantity of dosed fluid reductant into the reductant insertion conduit; a pressurized reductant receiving chamber defining a pressurized reductant receiver inlet; a reductant insertion pressure sensor; and a doser comprising a controller. The controller of the doser is configured to, based on a first actual pressure of the reductant, calculate a second target flow rate for a second injection event subsequent to a first injection event and control a quantity of dosed fluid reductant released during the second injection event based on the second target flow rate.

Abstract: In one embodiment, a computing device includes one or more processors configured to execute instructions that cause the one or more processors to acquire pressure data measured by at least one pressure sensor disposed proximate to a filter house in an intake of a gas turbine engine system, derive an airflow or an air mass flow through a duct of the intake using a thermodynamic model of the gas turbine engine system based at least on the pressure data, derive an intake pressure drop in the duct using at least the pressure data, derive a loss parameter of the filter house by combining the air mass or air mass flow, and the intake pressure drop, derive a pressure loss model based on the loss parameter over a period of time, and determine a condition of the filter house based on the pressure loss model.

Abstract: A fault detection method for a selective catalytic reduction (SCR) system comprising an SCR reactor, includes receiving a plurality of operating parameters (702) of the SCR reactor from a plurality of sensors. The method also includes estimating a state of an adaptive reactor model (704) representative of the SCR reactor based on the plurality of operating parameters. The method also includes generating a feature parameter (706) based on the plurality of operating parameters and the estimated state of the adaptive reactor model. The method includes determining a fault in the SCR system (708) based on the feature parameter.

Abstract: A method for causing exhaust gas flow to flow at least 270 degrees in a first direction about a perforated tube using a baffle plate having a main body with a plurality of flow-through openings and a plurality of louvers positioned adjacent to the flow-through openings. The method includes deflecting a first portion of the exhaust gas flow with the main body of the baffle plate. The method also includes allowing a second portion of the exhaust gas flow to flow through the flow-through openings of the baffle plate. The method also deflects the second portion of the exhaust gas flow at a downstream side of the main body with the louvers hereby causing the second portion of the exhaust gas flow to flow in the first direction about the perforated tube.

Abstract: The invention relates to a method for checking the function of at least one PTC heating element which is used in a device for providing a liquid additive. The at least one PTC heating element is connected to a voltage source via electric conductors. According to the method, a starting current with a first value is provided at a specified operating voltage in a step a). Then, in a step b), a monitoring process is carried out in order to determine whether the starting current with the first value is provided for a minimum duration, said minimum duration having a value of at least seconds. The method is used in particular for on-board diagnoses of a device for providing a liquid additive.

Abstract: An exhaust passage 53 includes: a first passage (high-speed passages 24b, 25b, and 26b); and a second passage (low-speed passages 24c, 25c, and 26c). A turbine housing 560 is connected to the exhaust passage 53 downstream from the collector 54. An exhaust device 100 of an engine 1 includes a valve (an exhaust variable valve 3) to open and close the first passage. A controller (an engine controller 7) closes the valve if an engine speed of the engine 1 is lower than a predetermined engine speed and opens the valve if the engine speed of the engine 1 is higher than or equal to the predetermined engine speed. The controller opens the valve even though the engine speed of the engine 1 is lower than the predetermined engine speed if performing the fuel cut control.

Abstract: A method and system controls a regeneration of a particle filter of an internal combustion engine. A first value is measured for the oxygen content in exhaust gas upstream from the particle filter. A second value is measured for the oxygen content in exhaust gas downstream from the particle filter. The particle filter is determined to be free of soot when the second value for the oxygen content is equal to the first value for the oxygen content.

Abstract: A reductant delivery unit (RDU) for a selective catalytic reduction system, including a housing; a fluid inlet disposed at an upper portion of the housing; a fluid return outlet; a fluid nozzle outlet disposed at a lower portion of the housing; an injector disposed within the housing and configured to receive fluid from the fluid inlet and selectively discharge the fluid from the fluid nozzle outlet; and at least one fluid passageway disposed within or around the housing. The fluid passageway provides fluid communication along a first fluid path between the fluid inlet and the fluid nozzle outlet and along a second fluid path between the fluid inlet and the fluid return outlet so that the same fluid discharged by the injector is also used as a coolant for the RDU.

Abstract: An exhaust after-treatment system has a DEF system with improved DEF purge cycling during which time DEF is returned to a DEF storage tank. The DEF system adapts its methodology based on a condition within the DEF system. A purge valve may be arranged in a doser feed line between a DEF supply module and a DEF doser module. A purging control system may be configured to control the purge valve based on detected states within the DEF system, such as a detected state that corresponds to a plugged DEF doser module. If a plugged doser module is detected, the purge valve may be opened to vent the doser module feed line to atmosphere which allows the DEF to be returned to the DEF storage tank without creating a siphon effect that could draw additional DEF from the DEF storage tank into the supply module.

Abstract: A method and system for regenerating a soot particle filter of an internal combustion engine is disclosed. The engine control unit determines a pressure difference from a differential pressure signal received from a differential pressure sensor, which pressure difference is present between an exhaust gas inlet and an exhaust gas outlet of the soot particle filter. The method compares the pressure difference to a pressure difference threshold value and operates the combustion engine in a regeneration operating profile if the determined pressure difference is smaller than the pressure difference threshold value. If the determined pressure difference is greater, a differential pressure correction device is connected between the differential pressure sensor and the engine control unit and a differential pressure simulation signal is generated by the differential pressure correction device and transmitted to the engine control unit to operate the internal combustion engine in the regeneration operating profile.

Abstract: Methods and systems are provided for regenerating an exhaust particulate filter during an engine non-combusting condition. In one example, a method may include, responsive to a higher than first threshold soot load on the PF and a higher than threshold PF temperature, regenerating the PF by flowing compressed air through the PF via operation of an electric booster coupled to the intake manifold.

Abstract: A mixer device for introducing and distributing a liquid into a gas flow comprises a mixing chamber which can be flowed through by the gas flow, an overflow pipe which is arranged at least partly in the mixing chamber and which has a jacket surface and a first and a second pipe end, and at least one injector associated with the first pipe end of the overflow pipe to inject the liquid into the overflow pipe. The jacket surface of the overflow pipe has at least one inflow opening through which gas can flow from the mixing chamber into the overflow pipe for a subsequent mixing with the injected fluid. The overflow pipe is configured such that inflowing gas in its interior can have two swirl components of opposite senses imparted onto it.

Abstract: Technical solutions are described for an emissions control system for controlling a selective catalytic reduction (SCR) device of an exhaust system of an internal combustion engine. An example computer-implemented method includes governing a reductant dosing in the SCR device. For example, governing the dosing includes computing a reductant dosing rate based on a chemical model of the SCR device. Further, the governing includes determining a temperature modulation factor based on inlet temperature of exhaust gas input for the SCR. The method further includes adjusting the reductant dosing rate by scaling the reductant dosing rate by the temperature modulation factor. The method further includes causing an amount of reductant to be injected into an SCR catalyst according to the adjusted reductant dosing rate.

Abstract: An exhaust line includes a housing having a wall with an opening and a baffle disposed within the opening. In certain embodiments, the exhaust line includes a divider between the wall and baffle that partially defines a mixing chamber for receiving an exhaust and a reducing agent, and partially defines a bypass chamber for receiving another portion of the exhaust. The divider defines an inlet and outlet facing respective upstream and downstream ends. The divider transfers heat from exhaust passing through the bypass chamber to the reducing agent inside the mixing chamber. In other embodiments, the baffle partially defines a first passageway substantially parallel to and offset from a center axis for delivering a portion of the exhaust to the mixing chamber, and a ramped surface partially defining a second passageway transverse to the first passageway for delivering another portion of the exhaust to the mixing chamber.

Abstract: A basic regeneration completion pressure difference value is set based on a predicted deposition amount of incombustible deposits produced steadily on a particulate filter, and a corrected regeneration completion pressure difference value higher than the basic regeneration completion pressure difference value is set based on a deposition amount of incombustible deposits deposited unsteadily on the particulate filter. After regeneration processing starts, when a time for which a pressure difference value is maintained to be equal to or greater than the basic regeneration completion pressure difference value after decreasing to the corrected regeneration completion pressure difference value exceeds a prescribed regeneration completion time, the regeneration processing ends.

Abstract: An exhaust purification system is equipped with: a linear exhaust pipe through which exhaust gas emitted from an engine passes; an injection nozzle that injects a reducing agent into the exhaust pipe at an oblique angle with respect to the axial direction of the pipe; a reduction catalyst that is provided in the exhaust system downstream from the injection nozzle, and that purifies the exhaust gas by causing the exhaust gas to react with the reducing agent; and a mixer member that is provided inside the exhaust pipe 13, downstream from the injection nozzle, and that causes the reducing agent to mix with the exhaust gas and diffuse. The mixer member includes multiple fins protruding downstream, and is arranged inclined inside the exhaust pipe such that the upstream surface thereof faces the injection opening surface of the injection nozzle.

Abstract: The present invention relates to a method for diagnosing an exhaust gas system of an internal combustion engine with at least one three-way catalytic converter, at least one four-way catalytic converter and at least one binary lambda sensor, wherein during the testing of the functional operability of the at least one binary lambda sensor and/or of at least one four-way catalytic converter on the basis of a lambda change with a changeover of the internal combustion engine from a lean operation to a rich operation following a thrust operation clearing out at least one three-way catalytic converter occurs.

Abstract: A tank device for a motor vehicle, and a motor vehicle having such a tank device. The tank device includes a motor vehicle tank, a ventilation outlet, and a filler pipe head configured to fill the motor vehicle tank. The filler pipe head includes a filler opening configured to receive a nozzle during a filling sequence, and a filling ventilation opening configured for movement between an open state during introduction of the nozzle to fluidically connect an inner space of the filler pipe head to the ventilation outlet, and a closed state during removal of the nozzle from the filler opening, the filler pipe head having an operational ventilation opening fluidically connected to the ventilation outlet, and which has a semi-permeable diaphragm to permit flow of gasses therethrough and also to prevent a flow of fluids.

Abstract: An exhaust emission control system of an engine is provided, which includes a NOx catalyst disposed in an exhaust passage for storing NOx within exhaust gas when an air-fuel ratio of the exhaust gas is lean, and reducing the stored NOx when the air-fuel ratio is approximately stoichiometric or rich. A processor executes a NOx reduction controlling module for performing a NOx reduction control in which a fuel injector performs a post injection to control the air-fuel ratio to a target ratio, and an EGR controlling module for controlling an EGR valve to recirculate EGR gas. In the NOx reduction control, the EGR controlling module controls an opening of the EGR valve to a target opening smaller than when the NOx reduction control is not performed. The NOx reduction controlling module starts the control after the EGR valve opening is controlled to the target opening.

Abstract: An exhaust purification system includes an exhaust after-treatment apparatus which is provided on an exhaust passage of an internal combustion engine and which includes catalysts for purifying exhaust gas, a catalyst temperature retention control module for executing a catalyst temperature retention control in which an intake air flow is reduced to thereby suppress a reduction in the temperature of the catalysts when the internal combustion engine is in a motoring state where fuel injection into the internal combustion engine is stopped, and a prohibition module for prohibiting the execution of the catalyst temperature retention control in a case where an activation of an exhaust brake system is detected while the internal combustion engine is in the motoring state.

Abstract: A method for heating an operating agent for a rail vehicle, particularly for heating a reducing agent for the after-treatment of exhaust gas. A coolant liquid is pumped through a cooling circuit of the internal combustion engine by a pump when the operating agent heating system is in an operating mode and, also in the operating mode, the coolant liquid can be pumped through a main heating circuit by the pump in order to heat the operating agent in a reservoir. In a preheating mode, the main heating circuit for the operating agent is uncoupled in a substantially fluid-mechanical manner from the cooling circuit of the internal combustion engine. The cooling circuit functions as a first sub-circuit of a preheating circuit and the uncoupled main heating circuit functions as a section of a second sub-circuit of the preheating circuit.