Abstract: A regeneration control system for an exhaust filter in an internal combustion engine system includes a first sensing mechanism for monitoring an exhaust flow resistance of the exhaust filter, and a second sensing mechanism for monitoring an attenuation of electromagnetic energy transmitted through the exhaust filter. The regeneration control system further includes an electronic controller coupled with the sensing mechanisms and configured to output a filter regeneration command responsive to an amount of particulate matter trapped within the exhaust filter. The electronic controller is further configured to weight data from the first and second sensing mechanisms in determining the amount of particulate matter. Weighting of the data may be responsive to an operating state of the internal combustion engine system. Related methodology is also disclosed.

Abstract: A control system comprises a particulate matter (PM) filter, an electric heater, a first heating module, and a second heating module. The PM filter includes M zones that filter PM from exhaust gas. The electric heater includes M segments corresponding to the M zones that heat exhaust gas input to selected ones of the M zones when activated. The first heating module activates N of the M segments to heat exhaust gas input to N of the M zones to regenerate the N zones. The second heating module operates in one of a first mode and a second mode to regenerate other ones of the M zones after the N zones are regenerated. The first mode includes adjusting an air-fuel ratio of the exhaust gas. The second mode includes activating other ones of the M segments to heat exhaust gas input to other ones of the M zones.

Abstract: In an internal combustion engine, an NOx selective reduction catalyst (14) is arranged in an engine exhaust passage, and an NOx storage catalyst (12) is arranged in the engine exhaust passage upstream of the NOx selective reduction catalyst (14). When the amount of NOx stored in the NOx storage catalyst (12) exceeds a predetermined allowable value, the NOx storage catalyst (12) is raised in temperature to make the NOx storage catalyst (12) release the NOx. The amount of urea feed is decreased by exactly the amount of reduction of the calculated stored NOx amount with respect to the amount of urea feed determined from the engine operating state, and the amount of urea feed is increased by exactly the amount of reduction of the calculated released NOx amount with respect to the amount of urea feed determined from the engine operating state.

Abstract: In order to relief a sudden change of engine sound during the transition to recovery control of a particulate removing filter or during returning from the recovery control, a system of treating exhaust gas of an engine includes an exhaust-gas particulate removing filter in an exhaust path, closes down the opening of an inlet throttle valve or an exhaust throttle valve to a recovery opening smaller than a normal opening during recovery of the particulate removing filter, and returns the opening from the recovery opening to the normal opening after the recovery of the particulate removing filter. The opening of the inlet throttle valve or the exhaust throttle valve during the closing process from the normal opening to the recovery opening and during the returning process from the recovery opening to the normal opening is changed at a gradually decreasing or gradually increasing rate of change of the opening.

Abstract: A system for filtering and oxidizing particulate matter produced by a gasoline direct injection engine is disclosed. In one embodiment, engine cylinder air-fuel is adjusted to allow soot to oxidize at an upstream particulate filter while exhaust gases are efficiently processed in a downstream catalyst.

Abstract: An exhaust component for use with a combustion engine is disclosed. The exhaust component may have a housing at least partially defining an inlet and an outlet, and a treatment device supported by the housing in communication with exhaust passing from the inlet to the outlet. The exhaust component may also have a life indicator permanently associated with at least one of the housing and the treatment device.

Abstract: When switching an exhaust throttle valve from full opening to a closed position to warm up an engine, an intake throttle valve is fixed to full opening, an EGR valve is fixed to full closing, and a variable turbo-vane is fixed to a predetermined opening degree to accelerate a gas flow rate from an intake passage to an exhaust passage, a fully opened flow rate is detected and stored by gas flow rate detector, with the exhaust throttle valve being full opening. Then, an instruction is issued to the exhaust throttle valve to switch from the full opening to a closed position, after which a rotation number of the engine is detected, a threshold value is determined based thereon, a closed position flow rate is detected, a flow rate difference relative to the stored fully opened flow rate is determined, and failure of the exhaust throttle valve is judged based on whether the flow rate difference is less than the determined threshold value.

Abstract: Systems, methods, and computer readable storage media are described in which exhaust gas is routed to a hydrocarbon retaining device during starting, and purged to the engine intake manifold. Various alternative approaches are described for controlling operation and diagnosing degradation. Further, various interrelated configurations are described.

Abstract: In one aspect, the present disclosure is directed to a system for reacting with sulfuric acid. The system may include a housing having an inlet and an outlet and may also include a component disposed downstream of the inlet and upstream of the outlet. The component may be configured to restrict a flow of fluid through the housing as a function of sulfuric acid present within the fluid.

Abstract: A low pressure exhaust gas recirculation (EGR) cooler efficiency diagnosis method for an EGR system includes measuring speed and load of an engine, setting a difference threshold between model temperature and detected temperature downstream of the low pressure EGR cooler according to speed and load of the engine, measuring a pressure difference between upstream and downstream sides of the EGR valve, calculating a mass flow rate of an exhaust gas passing through the low pressure EGR cooler based on the measured pressure difference, calculating the efficiency of the low pressure EGR cooler based on the calculated mass flow rate, calculating the model temperature downstream of the low pressure EGR cooler based on the calculated efficiency, and comparing the model temperature downstream of the low pressure EGR cooler with the detected temperature downstream of the low pressure EGR cooler. A low pressure EGR system is also disclosed.

Abstract: A method for operating a spark-ignition engine having a three-way catalyst and a particulate filter downstream thereof, comprising: oscillating an exhaust air-fuel ratio entering the particulate filter to generate air-fuel ratio oscillations downstream of the particulate filter, while increasing exhaust temperature; when the downstream oscillations are sufficiently dissipated, enleaning the exhaust air-fuel ratio entering the particulate filter; and reducing the enleanment when an exhaust operating parameter is beyond a threshold amount.

Abstract: A temperature control system comprises a temperature determination module, a temperature correction module, a temperature control module, and an updating module. The temperature determination module determines a desired outlet temperature for an oxidation catalyst (OC) that is located upstream of a particulate filter (PF) in an exhaust system. The temperature correction module determines a temperature correction from a plurality of temperature corrections. The temperature control module controls an outlet temperature of the OC based on the desired outlet temperature and the temperature correction. The updating module selectively updates at least one of the plurality of temperature corrections when an engine speed and an engine load are within respective predetermined ranges.

Abstract: An exhaust gas purifying apparatus for an internal combustion engine is provided to desorb predetermined components contained in exhaust gas from an adsorption device for adsorbing the components and to purify the desorbed components, even during the stop of the internal combustion engine. A main exhaust passage and a bypass passage bypassing the main exhaust passage are provided. An exhaust switching valve is capable of switching a flow target into the exhaust gas flows between the main exhaust passage and the bypass passage. An adsorbent for adsorbing the predetermined components is provided in the bypass passage. An underfloor catalyst including a catalyst with a heater is provided at a downstream side of the bypass passage in the main exhaust passage. A pump and a heater are provided in an air supply passage which branches from the bypass passage at an upstream portion of the adsorbent.

Abstract: It is an object of the present invention to provide a black smoke exhaust purification apparatus capable of equalizing temperature of a particulate filter and facilitating maintenance thereof. The black smoke exhaust purification apparatus is arranged in series therein with an oxidation catalyst and a particulate filter wherein an inlet for exhaust gas is disposed between the oxidation catalyst and the particulate filter, and wherein an exhaust gas passage is extended from the inlet portion through the oxidation catalyst so as to be connected to an upstream space of the oxidation catalyst.

Abstract: A platform mounted emissions control unit includes a first system to reduce Particulate Matter (PM), Sulfur Dioxide (SO2), and Volatile Organic Compounds (VOCs), and a second system to reduce Oxides of Nitrogen (NOx). The systems serially process exhaust from a mobile or stationary pollution source. In one embodiment, first system is an Ionizing Wet Scrubber (IWS) and the second system is a Selective Catalytic Reducer (SCR), wherein the IWS processes the exhaust first to improve efficiency and service life of the SCR. A generator produces power required by the IWS and SCR, and heat from exhaust of the generator may be used convert urea to ammonia for use by the SCR, and to heat the exhaust flow into the SCR. The SCR may further include a heat exchanger to capture heat in the flow out of the SCR and use the captured heat to heat the flow into the SCR.

Abstract: A controller is constructed such that fuel addition by a fuel injection device is automatically conducted when a predetermined time has passed with a diesel engine being in an idling state, and without a regeneration button being manually operated under a condition of a particulate deposition amount being estimated by the controller on the basis of a pressure signal from a pressure sensor to be within a manual regeneration range over said automatic regeneration range.

Abstract: An adsorption unit for combustion gas of an internal combustion engine has an adsorption housing having a chamber section with an inner wall. An adsorption element disposed in the adsorption housing is made of a gas-permeable adsorption medium that is formed to a hollow body and encloses an interior of the adsorption element. The hollow body has opposed open ends. A main flow passage extends through the hollow body and the combustion gas flows in main flow direction through the hollow body. The adsorption element has an exterior circumferential side facing away from the interior and delimiting together with the inner wall of the chamber section a bypass chamber surrounding the absorption element outwardly. In the main flow direction, the bypass chamber has a downstream end that is closed off and an upstream end that has at least one bypass opening that communicates with the main flow passage.

Abstract: The present invention relates to a sliding fit for the axially movable bearing of a thermally loaded pipe on a component, in particular on an exhaust system of an internal combustion engine, having a wire mesh which is radially supported on the outside of the pipe and is secured directly or indirectly to the component.

Abstract: An exhaust treatment system associated with a power source is disclosed. The exhaust treatment system may have a filter located to remove particulate matter from an exhaust flow of the power source. The exhaust treatment system may further have a heat source located to elevate the temperature of the exhaust flow. The exhaust treatment system may also have a first sensor and a second sensor. The exhaust treatment system may further have a controller in communication with the heat source, the first sensor, and the second sensor. The controller may be configured to receive a particulate matter load value and a power source load value and activate the heat source when the particulate matter load value is above a particulate matter load threshold value and the power source load value is below a power source load threshold value that is indicative of the exhaust flow being within an exhaust flow range.

Abstract: A method for improving the effectiveness of filters by increasing accuracy of an estimate of particulate matter loading remaining in the filter after cleaning. In one embodiment, the disclosed method includes removing soot from the DPF by cleaning, and measuring parameters for a set of predetermined criteria. The amount of soot present in the DPF is then estimated based on delta pressure. The resulting estimated soot load value accounts for the noise factors such as ash loading after extended operation. The value is then used to adjust for future measurements of soot loading in the DPF after subsequent regeneration treatments and/or used to diagnose the effectiveness of the cleaning. The method can also be applied to diagnostics of the DPF. When discrepancies between DPSLE and model-based soot load estimate are observed in healthy regenerations, failure modes such as plugged filter, extreme ash loading or substrate melting can be detected.

Abstract: An internal combustion engine capable of improving cleaning efficiency by preventing an increase in the temperature of the exhaust gas to lessen the deterioration of the catalyst. The internal combustion engine includes a convergent section, a divergent section, and a branch section. The branch section branches a shock wave, propagating in a downstream direction at a higher velocity than exhaust gas flowing into an exhaust path from a combustion chamber when an exhaust valve is opened, from a portion of the exhaust path which is upstream with respect to the divergent section, and propagates the shock wave back to the exhaust path. The exhaust gas is caused to pass the convergent section and to collide against the shock wave between the branch section and the divergent section, so as to increase the pressure of the exhaust gas in the convergent section. Such exhaust gas is caused to pass the divergent section to generate a new shock wave and to decrease the temperature of the exhaust gas.

Abstract: In emergency regeneration, i.e., after a judgment is made that purification is insufficient after ending forced regeneration, forced regeneration has expired before completion, or when a pressure difference across a diesel particulate filter exceeds a predetermined first judging pressure difference when traveling distance of a vehicle is shorter than a predetermined distance, an alarm for urging manual regeneration is issued. When manual regeneration is designated thereafter by the vehicle's user, manual regeneration is performed. When predetermined conditions are satisfied before receiving a designation of manual regeneration, automatic regeneration is performed.

Abstract: A method and control system for a selective catalytic reduction (SCR) catalytic converter and a diesel particulate filter (DPF) includes a DPF control module that determines a particulate matter (PM) load progress of the DPF and generates a DPF regeneration request based on the PM load progress. The control system also includes an SCR control module that selectively adjusts an ammonia load of the SCR catalytic converter prior to regeneration of the DPF based on a storage capacity of the SCR catalytic converter and the PM load progress.

Abstract: A method comprises determining a temperature of a particulate matter (PM) filter in communication with an exhaust gas from an engine; and reducing a power output of the engine when the PM filter is not being regenerated and the temperature exceeds a first predetermined temperature. A control module comprises a PM filter temperature determination module that determines the temperature of a PM filter in communication with an exhaust gas from an engine; and a reduced engine power module in communication with the PM filter temperature determination module that reduces the power output of the engine when the PM filter is not being regenerated and the temperature exceeds a first predetermined temperature.

Abstract: A method of reducing emissions by operating a diesel engine in a stoichiometric air-fuel ratio mode. To achieve an optimal stoichiometric mode, intake throttling, boost air intake control, fuel injection adjustments, and exhaust gas recirculation (EGR) are used. This mode of operation permits an aftertreatment system that has only an oxidation catalyst and a particulate filter.

Abstract: A particulate filter for a vehicle exhaust system includes a primary filter surrounded by a secondary filter and a quenching agent injection nozzle arranged upstream of the primary filter. In a normal mode, exhaust flows through the primary filter, and in a fail-safe mode or a mixed mode, at least some exhaust flows through the secondary filter and quenching agent is injected via the nozzle to cool the primary filter. The fail-safe or mixed modes may be enacted during an overload of the primary filter, for example. If engine shutdown is initiated during regeneration of the primary filter, a rate of quenching agent injection may be adjusted so that the regeneration may be completed at a safe temperature.

Abstract: A method of detecting ash in an exhaust particulate filter system for an internal combustion engine includes transmitting electromagnetic energy through an exhaust particulate filter containing soot and ash, and sensing a strength of the transmitted electromagnetic energy after having been attenuated in response to the soot. The method further includes electronically storing a filter monitoring history responsive to a difference between the transmitted strength and the sensed strength of the electromagnetic energy, and detecting an amount of the ash based at least in part upon a pattern of electromagnetic energy attenuation defined by the stored filter monitoring history. An exhaust particulate filter system for implementing related methodology includes a microprocessor configured to determine a value indicative of an amount of ash contained within an exhaust particulate filter responsive to a pattern of electromagnetic energy attenuation defined by a stored filter monitoring history.

Abstract: A control system comprises a combustion control module and a regeneration control module. The combustion control module controls operation of a vehicle in a first mode during which a combustion engine is off and in a second mode during which the combustion engine is on. The regeneration control module is in communication with the combustion control module and activates an electric heater during the first mode to heat an inlet of a particulate matter (PM) filter. Exhaust gas produced by the combustion engine enters the inlet and initiates a regeneration cycle of the PM filter in the second mode.

Abstract: A closely-coupled exhaust aftertreatment system includes a first exhaust conduit comprising a first valve operable between a first position promoting an exhaust flow within the first exhaust conduit to an inlet of a first oxidation catalyst and a second position promoting the exhaust gas flow within a second exhaust conduit. It also includes a third exhaust conduit fluidly coupled to an outlet of the OC and comprising a second valve operable between a first position promoting an exhaust flow within the third exhaust conduit to an inlet of a particulate filter (PF) and a second position promoting the exhaust gas flow through a fourth exhaust conduit to an inlet in the second exhaust conduit. It further includes a turbocharger fluidly coupled to the second exhaust conduit downstream of the inlet and a selective catalyst reduction (SCR) catalyst that is located downstream of the turbocharger and upstream of the PF.

Abstract: An internal combustion engine includes a structure that increases the velocity of exhaust gas. The internal combustion engine includes a branch section arranged to branch a shock wave propagating at a higher velocity than exhaust gas and to guide the branched shock wave, and a reflecting section provided in the branch section. The reflecting section is arranged to reflect and return the shock wave back to an exhaust path and cause the shock wave to collide against the exhaust gas, thereby increasing the pressure of the exhaust gas. In accompaniment with the exhaust gas passing a divergent section of a convergent-divergent nozzle, a new shock wave propagating in a downstream direction in the exhaust path is generated, and the temperature and pressure of the exhaust gas are decreased.

Abstract: A method of forming a sheet member includes feeding first raw slurry into a forming device, dehydrating the first raw slurry to form a first forming body, feeding second raw slurry including inorganic fibers having a minimum diameter substantially equal to or less than 3 micrometers on the dehydrated first slurry, dehydrating the second raw slurry to form a second forming body on the first forming body, feeding third raw slurry into the forming device, dehydrating the third raw slurry to form a third forming body on the first and the second forming bodies, and compressing and dehydrating a forming body having a three-layer structure where the third forming body is formed on the first and the second forming bodies to form a sheet member having a three-layer structure. The first and third raw slurries include inorganic fibers having a minimum diameter substantially greater than 3 micrometers.

Abstract: An object of the invention is to recover the capability of an exhaust gas purification apparatus provided in an exhaust passage of an internal combustion engine with improved reliability. According to the invention there are provided recovery control execution unit for executing a recovery control in which the temperature of the exhaust gas purification apparatus is raised by supply of reducing agent to a precatalyst to thereby recover the capability of the exhaust gas purification apparatus and prohibition range setting unit for setting a recovery control prohibition range that is an operation range of the internal combustion engine in which execution of the recovery control by the recovery control execution unit is prohibited. The higher the degree of deterioration of the precatalyst is, the higher the maximum values of the engine torque and the engine revolution number in the recovery control prohibition range are set to be.

Abstract: An SOx trap catalyst able to trap SOx contained in the exhaust gas is arranged in an engine exhaust passage upstream of an NOx storing catalyst in an internal combustion engine. When the SOx trap rate of the SOx trap catalyst falls, fuel is added in the exhaust gas flowing into the SOx trap catalyst to form in the SOx trap catalyst a region in which an air-fuel ratio becomes locally rich. SOx released from the SOx trap catalyst in this region can be trapped in the SOx trap catalyst at the downstream side once again without flowing out from the downstream end of the SOx trap catalyst.

Abstract: An exhaust emission purification system and a related method of control, wherein an exhaust throttle valve is opened if an engine load reaches at least a predetermined first judgment value during execution of forced regeneration control, and generating an alarm of failure of the exhaust throttle valve if the engine load reaches at least a second judgment value which is larger than the predetermined first judgment value.

Abstract: A device and method for catalytic reduction of NOx in gaseous products of a combustion process before entry into the atmosphere. The gaseous and particulate products of a combustion process flow radially through a radial flow particulate filter element (24) that is effective to trap particulate matter, and are then directed axially through a collector (26). An injector (30) introduces a reductant into an axial end of the collector for entrainment with axial flow through the collector in a direction away from the injector. Flow leaving the collector is directed through an SCR catalyst (40) where catalytic reduction of NOx occurs.

Abstract: Each time a starting process for a diesel engine 2 is conducted and before the diesel engine 2 is started, any differences of the pressures P1 and P2 detected by first and second pressure sensors 21 and 22, respectively, with respect to a predetermined reference pressure value Pref, are computed and stored as first and second correction values ?P1 and ?P2, and then a differential pressure P12 across a particulate filter in the diesel engine 2 is computed using the pressure detection results of the first and second pressure sensors 21, 22 and the first and second correction values ?P1, ?P2. Thus, use of simply constructed and highly durable sensors during the detection of the differential pressure existing across the filter allows accurate measurement of this differential pressure.

Abstract: Various embodiments of an apparatus, system, and method are disclosed for controlling engine exhaust temperature. For example, according to one exemplary embodiment, an apparatus for controlling the temperature of engine output exhaust of an internal combustion engine during a regeneration event on a particulate matter filter includes a regeneration module and an exhaust temperature manager. The regeneration module is configured to determine a desired diesel oxidation catalyst (DOC) inlet exhaust temperature during a regeneration event. The exhaust temperature manager is configured to determine an air-to-fuel ratio strategy for achieving a desired air-to-fuel ratio within the combustion chamber for producing an engine output exhaust temperature approximately equal to the desired DOC inlet exhaust temperature. The air-to-fuel ratio strategy includes a first mode and a second mode. The first mode includes varying the position of an air intake throttle valve while maintaining a VGT device in a fixed position.

Abstract: An exhaust gas treating apparatus includes an adsorption tower (20) that has an adsorption layer filled with an adsorbent and a heat transfer path through which heat is transferred to the adsorption layer. The apparatus performs switching among the following processes: an adsorption process of introducing an exhaust gas from an engine (10) into the adsorption layer of the adsorption tower so that target components to be treated, including NOX, in the exhaust gas are adsorbed by the adsorbent; a desorption process of introducing the exhaust gas into the heat transfer path of the adsorption tower to heat the adsorption layer and introducing a desorption gas into the heated adsorption layer so that the target components are desorbed from the adsorbent, and a cooling process of introducing a cooling gas into the adsorption layer of the adsorption tower to cool the adsorption layer and introducing the cooling gas that has passed through the adsorption layer into an inlet of the engine.

Abstract: An acoustic cleaning assembly that includes a horn assembly and a generator body that is coupled to the horn assembly. The generator body includes an inner surface that at least partially defines an outlet plenum, and an opening that extends in flow communication between the horn assembly and the outlet plenum. An end cap is coupled to the generator body and includes an inner surface that at least partially defines an inlet plenum. A diaphragm is coupled between the generator body and the end cap. The diaphragm channels air from the inlet plenum to the outlet plenum to facilitate generating sound waves within the outlet plenum.

Abstract: A device and method for catalytic reduction of NOx in gaseous products of combustion by directing the products of combustion through a particulate filter (32) and then into a mixing zone (28) through separate flow passages (34, 36) at respective velocities greater than that at which products of combustion leave the filter, by causing an injector (38) to introduce urea solution through a nozzle (40) aimed toward the mixing zone along a slant direction (42) to, and across, flow entering the mixing zone through a first (34) of the separate flow passages and ultimately toward a far wall (44) of the mixing zone relative to the nozzle while directing exhaust flow entering the mixing zone through a second (36) of the separate flow passages to enter the mixing zone between the first flow passage and far wall, and by directing flow leaving the mixing zone through an SCR catalyst (48).

Abstract: Exhaust manifold of a turbo-supercharged reciprocating engine with any number of cylinders ranging from 2 to 6 and equipped with an EGR system which comprises: a) an outer casing (21) which includes flanges (23, 25) for effecting joining, respectively, to the cylinder head (13) of the engine and the turbine (15) and an opening towards an EGR outlet duct (27) and an inner wall (31) with low thermal inertia defining a regulating chamber (33) for the exhaust gases introduced into it, after passing through a particle filter (45), via a plurality of orifices (35) located in the inner wall (31); b) inner branches (41) for entry of the exhaust gases, situated opposite the exhaust pipes (17); c) an outlet duct (59) for conveying the exhaust gases to the turbine (15), designed as an extension of the inner wall (31).

Abstract: A method for producing an exhaust gas cleaning component having a carrier structure with an inflow side, an outflow side, a predefined through-flow direction and a deflection surface disposed opposite the outflow side, includes at least the following steps: providing the carrier structure, subjecting the carrier structure to an exhaust gas flowing from the inflow side to the outflow side in the predefined through-flow direction, determining a distribution of flow velocities on the outflow side of the carrier structure, and configuring the shape of the deflection surface with at least one backpressure element in dependence on the distribution of flow velocities on the outflow side, so that the distribution of flow velocities is equalized. An exhaust gas cleaning component and a motor vehicle having the exhaust gas cleaning component are also provided.

Abstract: A DPF accumulation amount estimating apparatus uses an integrated PM accumulation amount estimation logic which combines the difference between an engine PM emission amount and a PM regeneration amount and a DPF differential pressure model, thereby achieving minimized influences of changes in an exhaust gas flow rate and the like with resultant improved estimation accuracy.

Abstract: An exhaust system for use with a combustion engine is disclosed. The exhaust system may have a passage connected to receive exhaust from the combustion engine, and a cooling device located external to the passage to create a thermal gradient across a flow area of the passage that causes particulates within the exhaust to agglomerate on a wall of the passage. The exhaust system may also have a filtration device located to separate agglomerated particulates from the exhaust.

Abstract: A removable exhaust treatment unit for an aftertreatment assembly is provided. The removable exhaust treatment unit include a housing, at least one exhaust treatment element coupled within the housing, and a flange on one end of the housing. The removable exhaust treatment unit also includes a plurality of apertures on the flange configured to receive a plurality of fasteners. The removable exhaust treatment unit further includes at least one handle coupled to the flange.

Abstract: A method to monitor a particulate filter includes determining an equivalent bypass area corresponding to a difference between a mass flowrate of an exhaust gas feedstream flowing to the particulate filter and a mass flowrate of the exhaust gas feedstream flowing through porous walls of a substrate.

Abstract: An exhaust aftertreatment device has a unitary cast inlet that is configurable to have a 90° or 180° entry of combustion gasses relative to flow through tubular elements housing a diesel oxidization catalyst and a diesel particulate filter. The cast component provides the primary structural support for a tubular element connected to the casting element.

Abstract: A combined exhaust gas aftertreatment/dust ejector unit (10) is provided for use with a combustion process (14) and an air cleaner (16) of the combustion process (14). The unit (10) includes an elongate housing (30) containing an exhaust gas aftertreatment device (40) and having a radial exhaust gas outlet (34) to direct an exhaust gas flow (12) radially from the housing (30), and a dust ejector (60) including an ejector outlet (62) positioned in the exhaust gas outlet (34). The exhaust gas outlet (34) and the ejector outlet (62) have elliptical shaped cross sections (68,70), with the ejector outlet cross section (70) spaced inwardly from the exhaust gas outlet (34) to define a reduced flow area (72) for the exhaust gas flow (12) to accelerate the exhaust gas flow (12) past the ejector outlet (62).

Abstract: In the present exhaust purification system of an internal combustion engine, a particulate filter is arranged downstream of an NOx storage/reduction catalyst device and an S trap device is arranged upstream of the NOx storage/reduction catalyst device. A first fuel supplying device for supplying additional fuel for regeneration of the particulate filter to the exhaust system upstream of the S trap device or into the cylinder is provided. An amount of the additional fuel supplied by the first fuel supplying device is controlled to make the S trap device not release SOx. A second fuel supplying device is provided in the exhaust system between the NOx storage/reduction catalyst device and the particulate filter to make up for a deficiency of the additional fuel supplied by the first fuel supplying device in the regeneration treatment of the particulate filter.

Abstract: A closely-coupled exhaust aftertreatment system for an engine having twin turbochargers includes a first exhaust conduit comprising a first valve operable between first and second positions, the first promoting flow within the first conduit to an oxidation catalyst (OC), the second promoting flow within a second conduit; a third conduit is fluidly coupled to the OC outlet and includes a second valve operable between first and second positions, the first promoting flow within the third exhaust conduit to a particulate filter (PF), the second promoting flow through a fourth conduit to an inlet in the second conduit. A first turbocharger is coupled to the second exhaust conduit downstream of the inlet; an SCR catalyst is downstream of the first turbocharger to receive the flow therefrom and upstream of the PF to provide the flow thereto. A second turbocharger is coupled to the third exhaust conduit downstream of the second valve.