Abstract: A mixing element has a grid which includes a plurality of rows parallel to each other and a plurality of deflector elements which project from the grid and are inclined in relation to the grid plane normal. All deflector elements of one row are inclined in the same direction. The deflector elements of at least two immediately adjacent first rows are inclined in the same direction. The mixing element is used in an exhaust system of an internal combustion engine.

Abstract: A method for operating a compression-ignition internal combustion engine including an exhaust aftertreatment system having an oxidation catalyst fluidly coupled upstream of a catalyzed particulate filter includes introducing fuel into an exhaust gas feedstream of the engine upstream of the oxidation catalyst, determining operating parameters associated with the exhaust gas feedstream, determining a hydrocarbon slip rate through the oxidation catalyst corresponding to the operating parameters associated with the exhaust gas feedstream and the introduced fuel into the exhaust gas feedstream, and controlling a flowrate of fuel introduced into the exhaust gas feedstream upstream of the oxidation catalyst in response to the estimated hydrocarbon slip rate through the oxidation catalyst.

Abstract: In one approach a method for operating an engine including a DPF is provided. The method includes adjusting a post fuel injection amount based on a rate of change of engine torque during DPF regeneration. As one example, the adjusting includes reducing the amount when the rate of change is positive, and increasing the amount when the rate of change is negative. Furthermore, the method may also include delivering exhaust gas to a turbocharger turbine, to an oxidation catalyst, and then a DPF, the adjusting of the post fuel injection further based on thermal inertia of the turbocharger.

Abstract: Disclosed is a construction machine which comprises: a command changing regulation section; a loading device for imposing, on an engine, a load for raising an exhaust temperature of the engine up to a value at which particulate matter accumulated in a filter is burnt; and an instruction section for instructing the loading device to perform an operation for loading the engine. The instruction section prohibits the loading device from changing a loading level on the engine, during a period where a manipulation-state detection section detects a presence of a manipulation of a manipulation section. The command changing regulation section is set to a changing permission mode for permitting a value of a command which is to be assigned to an actuator control valve, to be changed according to changing a value of a command to be output from a manipulation device, during a period where the loading level is constant.

Abstract: A method for operating a device for the purification of exhaust gas of an internal combustion engine which is operated with an excess of air includes heating at least one heating apparatus of the device above a predetermined first setpoint temperature. The at least one heating apparatus is at least partially in contact with the exhaust gas, can be activated by electrical energy and is formed at least partially with an oxidation coating. At least the temperature of the at least one heating apparatus or of the exhaust gas is subsequently monitored. An increase in the hydrocarbon fraction of the exhaust gas is initiated if at least the temperature of the heating apparatus or of the exhaust gas has reached a threshold temperature or a low-load phase of the internal combustion engine is present. A motor vehicle having the device is also provided.

Abstract: A diesel dosing system for a vehicle includes a control valve (31) controlling fluid flow to a dosing valve (32) for supplying fuel directly into an exhaust passage of the vehicle. A system pressure source (55) feeds the control valve. A shutoff valve (54) is fluidly connected to the pressure source downstream thereof and to the control valve upstream thereof. The shutoff valve permits bi-directional flow there-through. A connection (57) is between the shutoff valve and the control valve defining a fluid volume there-between. The shutoff valve permits fluid flow from the system pressure source through the connection and to the control valve during a regeneration phase of the system. Upon engine shutdown and based on fluid pressure in the volume, the shutoff valve opens so that fluid trapped in the volume will communicate with the pressure source thereby reducing the fluid pressure in the volume.

Abstract: An exhaust gas-treating device (1) for an exhaust system of an internal combustion engine, especially of a motor vehicle, is provided with a housing (2), which has a jacket (3) extending circumferentially on the side and at least one bottom (4). The homogenization of the exhaust gas flow is improved with a mixing housing (14), which is arranged in the interior space (23) of the housing (2) and which has a mixing chamber (15). An inlet (16) of the mixing housing passes through the bottom (4) and communicates with the mixing chamber (15). An outlet (17) of the mixing housing passes through the bottom (4) and communicates with the mixing chamber (15).

Abstract: A control device for a reducing agent supply apparatus for controlling the reducing agent supply apparatus having reducing agent collecting means for collecting a reducing agent inside reducing agent supply paths in an exhaust gas purification apparatus that adds the reducing agent to an exhaust gas upstream side of a reducing catalyst disposed inside an exhaust gas passageway of an internal combustion engine, and reduces and purifies nitrogen oxides contained in exhaust gas using the reducing catalyst, includes: a stop detection portion that detects when the internal combustion engine stops; a reducing agent collecting means control portion that starts collection of the reducing agent inside the reducing agent supply paths when the internal combustion engine stops; and an injection valve control portion that keeps a reducing agent injection valve closed when the reducing agent collecting means starts operating and opens the reducing agent injection valve after a predetermined time period elapses.

Abstract: One embodiment is a method including operating an SCR system at a plurality of commanded ammonia to NOx input ratios, providing a plurality of data indicating NOx output from the SCR system for the plurality of commanded ammonia to NOx input ratios, and evaluating the plurality of data to diagnose the SCR system. Additional embodiment are methods, systems, and apparatuses including SCR diagnostics. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings.

Abstract: A single-piece and rigid coupling of a turbocharger with an oxidation mechanism of an exhaust line of an internal combustion engine, including a burnt gas inlet duct that extends along an inlet axis and a burnt gas outlet duct that extends along an outlet axis substantially orthogonal to the inlet axis. The inlet and outlet axes are located in two substantially parallel separate planes.

Abstract: A method and system for controlling a diesel particulate filter includes a particulate matter load determination module determining a particulate matter load in a diesel particulate filter (DPF), a desired oxygen level determination module determining a desired exhaust gas oxygen level based on the particulate matter load, an oxygen comparison module comparing the desired exhaust gas oxygen level and a measured exhaust gas oxygen level and generating a comparison signal and an electric DPF control module controlling an electrically heated catalyst in response to the comparison signal.

Abstract: In an exhaust emission purifying apparatus for an internal combustion engine, for adding a reducing agent for NOx to the exhaust gas to thereby purify NOx in the exhaust gas, the mixing of the reducing agent injected by an injection nozzle with the exhaust gas is accelerated. To this end, in the apparatus of the present invention, the injection nozzle for the urea water is disposed to be opposite to the flow of the exhaust gas, or to face upward in a vertical direction.

Abstract: An exhaust system for a machine is disclosed. The exhaust system may have a diffuser configured to receive exhaust from an engine. The exhaust system may further have a plurality of dosers associated with the diffuser and configured to inject fuel into the diffuser. The exhaust system may also have a controller configured to selectively control an amount of fuel injected by each of the plurality of dosers based on a velocity of the exhaust adjacent to each doser. In addition, the exhaust system may have an after-treatment component fluidly connected downstream of the diffuser and configured to heat the exhaust by oxidizing the injected fuel.

Abstract: A heater tube for an exhaust system is disclosed. The heater tube may have an open end to receive heated exhaust from a pre-heater. The heater tube may have a closed end located opposite the open end. The heater tube may also have an outer surface extending from the open end to the closed end. The heater tube may further have a fin attached to the outer surface. In addition, the heater tube may have an opening disposed on the outer surface to discharge the heated exhaust.

Abstract: In an internal combustion engine, inside of an engine exhaust passage in order from an upstream side, a hydrocarbon feed valve, oxidation catalyst, and exhaust purification catalyst are arranged. On the exhaust purification catalyst, platinum and rhodium are carried and a basic layer is formed. Hydrocarbons are intermittently fed from the hydrocarbon feed valve while maintaining the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst lean. At this time, the feed of hydrocarbons is controlled so as to ensure the continued presence of the reducing intermediate on the basic layer.

Abstract: In a method for heating a gas sensor (1), in particular an exhaust gas sensor for an exhaust system (5) of a motor vehicle (7), a temperature of the gas sensor (1) is determined and the heating process is influenced as a function of the temperature.

Abstract: A flow guide (8) is provided for an exhaust system (3) of an internal combustion engine (1), especially in a motor vehicle. The flow guide (8) has at least one U-shaped guide plate body (13), which can be mounted with its U-base (14) on a pipe section (4?) of the exhaust system (3) and whose U-legs (15) form in the mounted state a flow guide plate (15) each. The flow guide plate cooperates with an exhaust gas stream (19) being guided in the pipe section (4?) during the operation of the exhaust system (3).

Abstract: A diesel engine having an inlet side and an outlet side provided with at least one inlet valve and one outlet valve per cylinder, comprises a reformer catalyst unit comprising a catalyst located downstream of the outlet valve(s) and located such that a proportion of the hot exhaust passes through the catalyst while the remainder of the hot exhaust passes to a turbocharger and/or to exhaust gas aftertreatment, wherein the catalyst unit is provided with diesel fuel supply means, preferably in the form of a diesel fuel injector, such that diesel fuel may be injected to provide heat to the reformer catalyst to raise it to an effective reforming temperature. The output from the reformer unit may be fed to the inlet side of the engine, and/or may be admixed with the remainder of the exhaust gases prior to catalytic aftertreatment. Improvements in emission control are possible.

Abstract: A burner device placed upstream of an exhaust treatment device mounted in an exhaust pipe to raise a temperature of an exhaust gas, comprises a fuel supply valve for supplying fuel into the exhaust pipe, an igniter that ignites the fuel supplied from the fuel supply valve, and a burner catalyst held in the exhaust pipe through a support member. The support member is formed in a corrugated shape in cross section including outer arc-shaped portions in contact with the exhaust pipe, inner arc-shaped portions in contact with an outer peripheral member of the burner catalyst, and coupling portions for coupling the outer arc-shaped portions and the inner arc-shaped portions to each other.

Abstract: Tubing for a liquid medium that is to be conditioned, in particular for a carbamide solution that is to be conditioned, wherein an inner tube is provided for the liquid medium that is to be conditioned, or for a liquid conditioning medium. The inner tube is encompassed by an outer tube, and runs parallel, or substantially parallel to the outer tube. At least one duct for the liquid conditioning medium, or for the liquid medium that is to be conditioned, is disposed between the inner tube and the outer tube. The inner tube and the outer tube consist of thermoplastic plastics, and the unit, consisting of the inner tube and the outer tube, is produced by means of co-extrusion.

Abstract: Suggested is a procedure for heating a catalyst in the exhaust gas system of a supercharged combustion engine with direct fuel injection and variable gas exchange valve control by producing a reactive exhaust gas fuel/air mixture in the exhaust gas system, whereby an air percentage of the reactive fuel/air mixture is thereby produced that air is rinsed from a suction system of the combustion engine over its combustion chambers into the exhaust gas system. The invention distinguishes itself thereby that the combustion engine is operated in idle mode after a cold start with a greater valve overlap and/or a greater valve overlap profile than in a normal operation where the catalyst is already heated as well as with an apportionment of a fuel amount that has to be injected before a combustion into at least two partial injections per ignition and combustion chamber and with a suboptimal ignition angle efficiency.

Abstract: A temperature of exhaust gas downstream of an oxidation catalyst is compared to a temperature of the exhaust gas upstream of the oxidation catalyst to determine if the downstream temperature is increasing over time or decreasing over time as hydrocarbons are injected into the flow of exhaust gas to regenerate a particulate filter. The oxidation catalyst is determined to be quenched when the temperature of the exhaust gas downstream of the oxidation catalyst remains constant or decreases over time as the rate at which the hydrocarbons are injected into the exhaust gas increases. The oxidation catalyst is determined to not be quenched when the temperature of the exhaust gas downstream of the oxidation catalyst increases over time as the rate at which the hydrocarbons are injected into the exhaust gas increases.

Abstract: In one embodiment, an apparatus is disclosed for heating a reductant delivery line using coolant from an internal combustion engine where the reductant delivery line receives reductant from a reductant tank and a portion of a coolant line is positioned within the reductant tank. The apparatus includes a coolant temperature module that is configured to determine a reductant tank outlet coolant temperature target. Additionally, the apparatus includes a coolant flow rate module that is configured to generate a coolant valve flow rate command and transmit the command to a coolant valve. The coolant valve is controllable to regulate the flow rate of coolant through the coolant line. The coolant valve flow rate command is based on the reductant tank outlet coolant temperature target, a reductant tank inlet coolant temperature, and a reductant tank reductant temperature.

Abstract: The present invention relates to a connection device (1) for at least one media line (2), such as for a urea-water solution for exhaust gas after-treatment in a motor vehicle having an internal combustion engine. The connection device comprises a connection part (4) having a socket (6) for the circumferentially sealed insertion of a line-side plug section (8), and retention means (10) for locking the inserted plug section (8) in place to prevent detachment. The retention means (10) is configured in such a way that starting from a normal operating position the inserted and locked plug section (8) can be moved over a specific travel path relative to the connection part (4) in opposition to a return force (F), in order to enlarge an internal volume inside the connection part (4) to which the medium is admitted.

Abstract: A system includes a sampling module, a correlation determination module, and an injector control module. The sampling module samples first and second signals that indicate an amount of nitrogen oxides (NOx) upstream and downstream from a selective catalytic reduction (SCR) catalyst, respectively. The second signal further indicates an amount of ammonia downstream from the SCR catalyst when ammonia is released from the SCR catalyst. The correlation determination module determines an amount of correlation between the first and second signals, wherein the amount of correlation indicates a probability that ammonia is released from the SCR catalyst. The injector control module controls an amount of reducing agent injected into the exhaust gas upstream from the SCR catalyst based on the amount of correlation.

Abstract: A method of assessing non-methane hydrocarbon (NMHC) conversion efficiency in a diesel after-treatment (AT) system having a diesel oxidation catalyst (DOC) arranged upstream of a diesel particulate filter (DPF) includes regenerating the AT system. Additionally, the method monitors DOC inlet and outlet temperatures during the regeneration. The method also assesses whether the DOC is operating at or above threshold efficiency by determining a DOC inlet/outlet temperature difference and comparing the determined inlet/outlet temperature difference with a threshold inlet/outlet temperature difference. The method also monitors DPF outlet temperature if the DOC is operating at or above the threshold efficiency and determines a DOC temperature/DPF outlet temperature difference.

Abstract: An air-assisted fluid injector has an injector housing having a nozzle bore and an injector nozzle sealably disposed in the nozzle bore and having an exposed injector face on one end that projects from an end of the nozzle bore, the injector nozzle having a fluid conduit on an other end that extends from a fluid inlet toward the injector face and that opens into a plurality of fluid outlet conduits that extend to a corresponding plurality of fluid outlets spaced apart on the injector face and operable to provide a predetermined spray pattern. The injector also includes an air conduit having an air inlet on the other end of the injector nozzle extending through the injector housing and opening into a plurality of air conduit outlets proximate the injector face, each air conduit outlet extending to and opening into a respective fluid conduit outlet.

Abstract: A method and a device provide for the controlled feeding of a reducing agent into an exhaust gas treatment unit with a storage capability for an exhaust gas component to be reduced which is generated from a mobile internal combustion engine. The method includes at least the following steps: a) determination of a quantity of the exhaust gas component to be reduced which is generated by the mobile internal combustion engine, b) determination of a storage capability of the exhaust gas treatment unit for the exhaust gas component to be reduced, c) determination of a metering of the reducing agent into the exhaust gas treatment unit as a function of steps a) and b), and d) feeding the reducing agent into the exhaust gas treatment unit.

Abstract: An exhaust system that processes exhaust generated by an engine is provided. The system includes: a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine; and a grid of electrically resistive material that is applied to an exterior upstream surface of the PF and that selectively heats exhaust passing through the grid to initiate combustion of particulates within the PF.

Abstract: A system and method relate to a reductant dosing for use in the reduction of NOx in an exhaust stream is disclosed. The system and method incorporates a separate first or start-up cartridge and an insulated mantel or housing containing at least one to a plurality of main cartridges. The first and main cartridges store an ammonia adsorbing/desorbing material, which releases ammonia gas upon application of sufficient heat. The start-up cartridge permits the initial release of ammonia gas into the exhaust stream even during start-up of an engine, and because it is separate from the main cartridge, the first cartridge cools faster than the main cartridge and can be replenished with ammonia sooner than the main cartridge. The start-up cartridge is housed in or surrounded by a non-insulating debris shield.

Abstract: An exhaust purification system of an internal combustion engine is provided with an exhaust treatment device which purifies exhaust, a fuel feed device which is arranged at an upstream side from the exhaust treatment device and which feeds fuel to the engine exhaust passage, an ignition device which causes fuel which is fed from the fuel feed device to ignite, and a flow regulating device which regulates the flow rate of exhaust gas which flows toward the ignition device. The fuel feed device is formed so as to feed liquid fuel. The system has an operating region in which due to the fuel which is fed to the engine exhaust passage burning, backflow of the exhaust gas occurs. Fuel is made to burn in the operating region. Further control is performed to make the flow rate of the exhaust gas increase during the period from when combustion of fuel should be started to when combustion of the fuel ends.

Abstract: Emissions treatment systems and methods for treating an engine exhaust gas stream containing NOx and particulate matter are disclosed including a particulate filter comprising a first SCR catalyst for NOx conversion a second SCR catalyst for NOx conversion on a substrate disposed downstream of the particulate filter. The system NOx conversion and the system back pressure increase lie within a targeted operational window.

Abstract: A mixing plenum for exhaust gas comprises a canister with an inlet and an outlet. A bulkhead is located downstream from the inlet to define an exhaust gas consolidation chamber. An opening in the bulkhead allows exhaust gas to enter a u-shape conduit configured to direct the exhaust gas from a downstream direction to an upstream direction before releasing the exhaust gas back into the plenum downstream of the bulkhead. An injector is configured to inject fluid into the exhaust gas entering the conduit. A conduit exit located a distance “E” from the downstream side of the bulkhead allows the exhaust gas/fluid mixture to exit the conduit into a larger exit volume of the compact mixing can, in the manner of an expansion chamber, where its velocity slows and further mixing of the fluid/exhaust gas occurs and exits the compact mixing can through the outlet flange.

Abstract: An exhaust purification apparatus for an internal combustion engine according to the present invention includes a heated gas generation apparatus configured to generate heated gas utilizing exhaust gas flowing through an exhaust passage. The heated gas generation apparatus includes a catalyst configured to provide an oxidation function, a fuel supply nozzle, and a heater. An exhaust purification unit is provided downstream of the heated gas generation apparatus. An incoming gas temperature of the exhaust purification unit is detected and estimated. An actual incoming gas temperature being a detected value and an estimated incoming gas temperature both acquired when at least the fuel supply nozzle is actuated are compared with each other. Based on the result of the comparison, the apparatus detects one of poisoning of the catalyst with HC and degradation of the catalyst. Thus, the heated gas generation apparatus is prevented from discharging HC.

Abstract: According to one aspect of the present invention, a liquid reductant tank for supplying liquid reductant to a selective catalytic reduction system is disclosed. The tank includes a tank cavity for holding a liquid reductant and being at least partially defined by one or more side walls; a liquid reductant supply line at least partially situated within the tank cavity and for communicating liquid reductant from the tank cavity to outside of the tank cavity; and a heating element situated at least partially within the liquid reductant supply line and for thawing frozen reductant situated within the supply line during cold start conditions to obtain liquid reductant for use in a selective catalytic reduction system.

Abstract: An auxiliary filter arrangement for an exhaust aftertreatment system, such as a diesel particulate filter (DPF) system. The DPF communicates with an exhaust line to receive a flow of exhaust gases therethrough. An auxiliary filter is positioned in an auxiliary line or tube that connects an air supply, a pressure sensor, and/or any other aftertreatment system component to the exhaust line. The auxiliary filter can be a wire mesh filter operable to trap particulate or soot, thereby preventing the soot from traveling further up the auxiliary line toward the components of the air supply system, the pressure sensor, and/or the components of any other aftertreatment system communicating with the exhaust line through the auxiliary line.

Abstract: Procedure for operating an electromagnetically operated metering valve, which is impinged with a metering signal, which determines the metering of a reagent or a precursor of a reagent that has to be injected into the exhaust gas area of a combustion engine, is thereby characterized, in that the reagent pressure is detected at an opened metering valve in a default cycle, which indicates the reagent flow and in that the reagent flow is added over the opening time of the valve for determining the actual metering amount.

Abstract: A system for exhaust gas purification including, in an exhaust passage of an internal combustion engine in order from an upstream side: a device for direct injection into the exhaust pipe, an oxidation catalyst, and at least one of a catalyst for NOx removal and a catalyzed diesel particulate filter. A support of the oxidation catalyst is a metallic material or a material having a specific heat not higher than that of the metallic material, and has a structure that mixes the exhaust gas. Regeneration of the NOx occlusion/reduction type catalyst by NOx removal and the forced regeneration of the catalyzed diesel particulate filter by particulate matter removal can occur even when the engine is operated under low-load conditions.

Abstract: An exhaust purification system for an internal combustion engine, and a desulfurization method for the same, recovers purification performance of a denitrification catalyst by removing sulfur poisoned at the denitrification catalyst in an exhaust system.

Abstract: A reductant delivery unit (10?) for selective catalytic reduction (SCR) after-treatment for vehicles includes a fluid injector (12) having a fluid inlet (24) and a fluid outlet (25) with the fluid inlet receiving a source of urea solution to be sent through the fluid outlet. Movable inlet cup structure (16?) communicates with the inlet of the fluid injector. A shield (18?) is fixed with respect to the fluid injector and surrounds at least portions of the fluid injector and the inlet cup structure. A spring (26) is engaged between a portion of the inlet cup structure and the shield. When the urea solution freezes in the fluid injector and expands near the fluid inlet of the injector, the inlet cup structure moves toward the injector inlet to accommodate the frozen urea solution, with the spring returning the inlet cup structure to an initial position once the frozen urea solution melts.

Abstract: The invention relates to a metering device for fuel upstream of an oxidation catalytic converter in the exhaust gas system of an internal combustion engine. A closing valve and/or a metering valve and an injection valve are integrated downstream of a supply device for fuel into a line leading to a metering unit. A return having a first overflow valve branches off upstream of the metering unit. A further return having a second overflow valve influencing a mean pressure level of the metering unit is disposed between the closing valve and the metering valve.

Abstract: A system and method for efficient regeneration of a diesel particulate filter used in the exhaust system of a diesel engine, is disclosed. In various systems, a burner is incorporated into the exhaust stream, and prior to the diesel particulate filter. Because the burner requires precise amounts of fuel and air to operate properly, an air flow delivery device, such as a positive displacement pump or blower is incorporated into the system to channel boost air to the burner. Alternatively, a bypass line may be used in conjunction with a pressure regulator, wherein the bypass line diverts the boost air from the pump or blower, while the pressure regulator controls the final pressure to the burner.

Abstract: A reducing agent injection valve abnormality detection device for detecting clogging of a reducing agent injection valve in a reducing agent injection device has a pressure detection component that detects the pressure inside a supply path based on a sensor value of a pressure sensor, a pump control component that fixes the output of a pump in a state where the pressure inside the supply path has become a value in a predetermined range, a reducing agent injection valve control component that opens the valve for a predetermined amount of time in a state where the output of the pump has been fixed, and a clogging determination component that determines the extent of clogging of the reducing agent injection valve by comparing, with plural threshold values, the pressure, or a pressure drop quantity, inside the supply path when the valve has been opened for the predetermined amount of time.

Abstract: A breather device A1 for pressure relief includes a breather pipe 121 serving as a fixing part, and an inner pipe 122 serving as a communication part and is provided by the breather pipe 121 with fixation strength enough for securing the breather device A1 to a liquid tank 101. The inner pipe 122 has a vent hole P formed therein for provide fluid-communication between the inside of the liquid tank 101 and the outside thereof in a manner such that an inner surface forming the vent hole P is made of a resin.

Abstract: An exhaust system for an engine having a plurality of combustion chambers includes a housing containing a first array of parallel positioned emission treatment devices and a second array of parallel positioned emission treatment devices axially spaced apart from one another. A first exhaust passageway is in fluid communication with the combustion chambers and contains the first array of emission treatment devices. A second and separate exhaust passageway is in fluid communication with the combustion chambers and contains the second array of emission treatment devices. A first valve restricts the exhaust flow through the first exhaust passageway. A second valve restricts the exhaust flow through the second exhaust passageway.

Abstract: A technique is provided which is capable of reducing an amount of smoke generated in a temperature raising system in which fuel added to an exhaust gas flowing through an exhaust passage is caused to combust at the time of requesting a temperature rise in an exhaust gas purification catalyst. When a request for raising the temperature of an exhaust gas purification catalyst is made, bypass control is carried out in which the exhaust gas having bypassed a turbine is caused to flow into the exhaust gas purification catalyst through a bypass passage, and fuel ignition control is carried out in which a fuel addition valve is caused to add fuel to the exhaust gas which has flowed out of the turbine, and a glow plug is caused to ignite the added fuel.

Abstract: A combustion device for an exhaust treatment system is disclosed. The combustion device may have a fuel injector configured to inject fuel toward an exhaust flow. The combustion device may also have an ignition source configured to ignite the injected fuel. The combustion device may further have a deflector configured to redirect at least a portion of the ignited fuel towards a center of the exhaust flow.

Abstract: A method for controlling an engine includes receiving a request to regenerate a particulate matter filter and regulating, in response to the request, operation of the engine and an electric heater that heats an inlet surface of the filter such that for a first period, the heater maintains the inlet surface within a first temperature range above a regeneration temperature of the filter and combustion of a first mass of accumulated PM within the filter is initiated, for a second period following the first period, exhaust cools the inlet surface to within a second temperature range below the regeneration temperature and combustion of the first mass is inhibited, and for a third period following the second period, the inlet surface is maintained within a third temperature range above the regeneration temperature and a second mass of the accumulated PM is combusted. A related control system is also provided.

Abstract: A catalyst system includes a first catalytic composition and a second catalytic composition. The first catalytic composition includes a homogeneous solid mixture, which includes a first catalytic material disposed on a first substrate. The pores of the solid mixture have an average diameter of greater than about 45 nanometers. The second catalytic composition includes at least one of a zeolite or a second catalytic material disposed on a second substrate. The second catalytic material includes an element selected from the group that includes tungsten, titanium, and vanadium.

Abstract: The present invention is directed towards methods and systems for treatment of exhaust gas from an engine. In one embodiment, an exhaust gas treatment system for a diesel engine is provided. The system includes a urea selective catalytic reduction (U-SCR) catalyst in fluid communication with a diesel engine to receive an exhaust gas flow therefrom. The system also includes a four-way catalyst in fluid communication with the U-SCR catalyst to receive the exhaust gas flow therefrom, the four-way catalyst comprising a lean nitrogen oxide (NOX) trap (LNT) and diesel particulate filter (DPF).