Abstract: Provided is an exhaust gas combustion device which is capable of early prevention of clogging, and also a power generator including the device. An exhaust gas combustion device of the present invention includes: a DPF; a sensor which measures the pressure of exhaust gas to be introduced into the DPF; a sensor which measures the pressure of exhaust gas purified by the DPF; and a controller which receives outputs from both sensors and calculates a pressure difference. When the pressure difference is equal to or larger than a preset threshold, the heater is supplied with power from a power generating unit to thereby heat exhaust gas. Accordingly, PM accumulated inside the DPF is combusted and removed, preventing excessive clogging of the DPF even during light-load operation.

Abstract: A system comprises an injection control module and a fuel film module. The injection control module controls a flow rate of fuel injected into an exhaust system to adjust a temperature of exhaust gas. The fuel film module determines an accumulation rate of fuel on a surface of the exhaust system based on the flow rate of the fuel. The fuel film module determines a release rate of fuel from the surface of the exhaust system based on a flow rate of the exhaust gas. The injection control module adjusts the flow rate of the fuel based on the accumulation rate and the release rate.

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 diesel particulate filter assembly having a housing and a filter structure disposed within the housing for trapping particulate material in received exhaust gas as such received exhaust gas passes through the housing along a longitudinal axis of the housing. The filter structure has walls of particulate collecting, gas passing material. The walls pass portions of the exhaust gas while trapping particulate material in such passing exhaust gas. The walls are disposed the oblique to the direction of the received exhaust gas.

Abstract: A method is provided for compensating for variability in ash accumulation rates within an aftertreatment element of an engine exhaust system. The method includes determining flow resistance values through the aftertreatment element and tracking minimum flow resistance values over time. The method also includes correlating the tracked minimum flow resistance values over time, with a model of engine oil consumption rate that is based on predetermined values for model engine oil consumption. The method further includes adjusting the predetermined values based on the tracked minimum flow resistance values over time.

Abstract: Porous ceramic diesel particulate filters are regenerated to combust accumulated carbon particulates trapped therein through a controlled regeneration process wherein heat is input to the filter at a ramped or staged heating rate below that rate at which the particulate combustion process would proceed so rapidly and extensively that filter temperatures would be raised to filter-damaging levels.

Abstract: A regeneration controller for preventing particulate matter from increasing when an exhaust purification apparatus is inactivated. The regeneration controller includes an ECU 70 for heating the exhaust purification apparatus and eliminating the particulate matter accumulated in the exhaust purification apparatus when an estimated accumulation amount is greater than a reference accumulation amount. The ECU 70 obtains the estimated accumulation amount by estimating the amount of particulate matter accumulated in the exhaust purification apparatus. An exhaust temperature sensor 44 detects the temperature of the exhaust purification apparatus. The ECU 70 intermittently decreases the air-fuel ratio of exhaust to heat the exhaust purification apparatus and perform burn-up heating for burning the particulate matter. The ECU 70 further prohibits burn-up heating when the temperature detected by an exhaust temperature sensor 44 decreases to a catalyst inactivation level.

Abstract: One embodiment is a method including maintaining a count based upon an engine operating condition, determining a soot level based upon a characteristic of a diesel particulate filter, and requesting deSoot based upon the count meeting or exceeding a threshold, or the soot level meeting or exceeding a threshold, or both. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings.

Abstract: The present invention relates to an exhaust system for an internal combustion engine, in particular in a motor vehicle, having an SCR module containing at least one SCR catalyst element in an SCR housing connected to an exhaust line and having a PF module containing at least one particulate filter element in a PF housing connected to the exhaust line upstream from the SCR housing.

Abstract: A wall-flow exhaust gas emissions aftertreatment device for simultaneously reducing the particulate matter and NOx content of the exhaust. The device comprises a number of longitudinal inlet channels and outlet channels, the inlet channels being plugged at the exit face, and the outlet channels being plugged at the entry face. The interiors of the inlet channels are coated with a particulate matter catalyst coating, and the interiors of the outlet channels are coated with a selective catalyst reduction catalyst coating.

Abstract: A control system includes a heater control module, a measured duration module, and a regeneration volume module. The heater control module selectively initiates a regeneration in a zone of a particulate filter in an exhaust system. The measured duration module measures a duration of the regeneration. The regeneration volume module determines an available volume within the particulate filter to regenerate particulate based on the measured duration of the regeneration.

Abstract: An apparatus, system, and method are disclosed for determining a regeneration availability profile for an exhaust gas aftertreatment system. The method, in one embodiment, tracks historical attempts and success to determine the availability of regeneration for the system. In a further embodiment, the method divides the system operation into segments according to desired conditions which affect regeneration, for example the workload of an engine, and tracks separate success ratios for each operating condition. This allows prediction of success of a given regeneration based upon the current operating condition, as well as diagnostics of regeneration problems where an operating condition experiences trouble regenerating when historically it should not.

Abstract: An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passageway, and a reduction catalyst disposed within the exhaust passageway. The exhaust system may also have a first sensor located to generate a first signal indicative of an operational parameter of the reduction catalyst, and a second sensor located to generate a second signal indicative of a performance parameter of the reduction catalyst. The exhaust system may further have an injection device located to inject reductant upstream of the reduction catalyst, and a controller in communication with the combustion engine, the first sensor, the second sensor, and the injection device. The controller may be configured to determine a NOX production of the combustion engine, determine an amount of reductant that should be injected based on the NOX production and the first signal, and adjust the amount based on the second signal.

Abstract: An exhaust system for an internal combustion engine has a catalyzed ceramic wall flow particulate filter coated with a washcoat composition. The washcoat composition includes an oxidation catalyst of at least one platinum group metal and a NOx absorbent. The washcoat composition has a D50 of less than or equal to 8 ?m. The NOx absorbent absorbs NOx contained in an exhaust gas when the composition of the exhaust gas is lambda >1, and releases the NOx absorbed in the NOx absorbent when the exhaust gas composition is 1?lambda. The exhaust system has a platinum group metal catalyst upstream of the filter for oxidizing NO to NO2 at least when the composition of the exhaust gas is lambda >1. The uncoated portions of the ceramic wall flow particulate filter have a porosity of >40% and a mean pore size of 8-25 ?m.

Abstract: An engine compartment arrangement for an agricultural harvester comprises an engine (10), a diesel particulate filter (12) coupled to the engine (10) to receive and filter hot exhaust gases therefrom, a fan (14), a radiator (16) disposed in a cooling airflow path in front of the fan (14) and coupled to the engine (10) to cool said engine (10), a cleaning air duct (18) having a first end (20) disposed immediately behind the fan (14) to receive a portion of the air ejected from the fan (14), and having a second end (22) disposed adjacent to the top of the diesel particulate filter (12) to exhaust a jet of the ejected air at a sufficient speed and in sufficient volume across the top surface (24) of the diesel particular filter (12) to prevent an accumulation of agricultural debris on top of the diesel particulate fitter 12).

Abstract: An exhaust system for an engine including an exhaust passage with an expanding flow area and at least an opening for transferring air external to within the exhaust passage to cool the exhaust, for example due to particulate filter regeneration.

Abstract: A particulate trap system for an exhaust system of an internal combustion engine includes a monolithic wall-flow particulate trap having a plurality of contiguous porous walls, and a remotely actuated relief valve downstream of said trap for periodically creating a reverse pressure throughout the exhaust system upstream of the relief valve and including said trap. A reversing apparatus periodically creates a reverse pressure drop across a portion of the contiguous porous walls of said trap to dislodge accumulated particulate and cause a portion of the filtered exhaust gas to flow back through said portion of the contiguous porous walls to remove particulate therefrom. A control system actuates the relief valve and the reversing apparatus. In one embodiment the system is utilized on a vehicle and the reversing apparatus includes a relief valve that is also operative as an exhaust break.

Abstract: An hydraulic excavator is provided with an exhaust gas treatment apparatus in an exhaust pipe for effecting the purification treatment of exhaust gas including capturing the particulate matter in the exhaust gas. A space provided for mounting and removing a filter accommodating cylinder (31) is formed between the upstream cylinder (22) and the downstream cylinder (27). In particular, upwardly inclined connecting surfaces (23E and 28E) are provided on flange portions of upstream and downstream cylinders (22 and 27), respectively, and downwardly inclined connecting surfaces (32F and 32G) are provided on upstream side flange portions of filter accommodating cylinder (31). In consequence, a substantially V-shaped insertion space (S) which is gradually enlarged from a lower side to an upper side can be formed between the upstream cylinder (22) and the downstream cylinder (27).

Abstract: Catalytic articles, methods and emissions treatment systems for treating an engine exhaust gas stream containing NOx and particulate matter are disclosed and include a particulate filter comprising a first SCR catalyst for NOx conversion disposed downstream of the injector. The particulate filter is a partial filter with a particle filtration efficiency between about 30% and 60% and an SCR catalyst loading in the range of 0.1 g/in3-3.5 g/in3.

Abstract: A method for diagnosing a particle filter arranged in the waste gas line of an internal combustion engine has the steps of: executing at least one fuel injection, measuring HC emission in the waste gas line in the direction of flow of the waste gas behind the particle filter, and diagnosing a defect of the particle filter based on the measured HC emission.

Abstract: An internal combustion engine exhaust system comprises an exhaust gas recirculation pipe which, in use, recirculates engine exhaust gas into the engine air intake. A particulate filter is provided and a burner arrangement is arranged to burn off particulates caught by the filter.

Abstract: Apparatuses and methods related to an internal combustion engine are disclosed herein. In some embodiments, the apparatuses and methods include modifying a conventional internal combustion engine to enhance an operating efficiency. In other embodiments, an internal combustion engine of enhanced operating efficiency is disclosed.

Abstract: A control system for controlling regeneration of a particulate filter for a hybrid vehicle is provided. The system generally includes a regeneration module that controls current to the particulate filter to initiate regeneration. An engine control module controls operation of an engine of the hybrid vehicle based on the control of the current to the particulate filter.

Abstract: An exhaust treatment system for a power source has an air induction system, an exhaust system and a recirculation system. The exhaust system includes a particulate filter. The recirculation system is configured to draw exhaust from downstream of the particulate filter and direct the exhaust to the air induction system. The recirculation system includes an exhaust gas cooler, and an acidic debris filter.

Abstract: A particulate matter concentration measuring apparatus configured to measure concentration of particulate matter in exhaust gas passing through an exhaust line includes an exhaust gas collecting line branched from the exhaust line, a particulate matter detection filter provided in the exhaust gas collecting line, a differential pressure sensor configured to sense differential pressure between an inlet and an outlet of the particulate matter detection filter, a passage wall disposed so that the exhaust gas flows to a downstream side of the particulate matter detection filter, an inlet side passage through which the exhaust gas flows into the particulate matter detection filter in the passage wall, and an outlet side passage through which the exhaust gas flows out from the particulate matter detection filter. The outlet side passage has an outlet side cross-sectional area approximately 1.0 times or more larger than an inlet side cross-sectional area of the inlet side passage.

Abstract: A diesel particulate filtering system that includes a filter configured to capture exhaust particulates from a diesel engine, a regeneration device configured to heat exhaust gases from the diesel engine prior to the exhaust gases reaching the filter, and a controller configured to control operation of the regeneration device, wherein the controller is further configured to turn the regeneration device on when a weighted average of a plurality of normalized parameter values exceeds a threshold value.

Abstract: An exhaust gas-treating device (1) for an exhaust system of an internal combustion engine, especially of a motor vehicle, has a housing (2), which has a jacket (3) extending circumferentially on the side and two end-side end bottoms (4, 5). Maintenance is simplified with at least one mounting tube (6), which passes through one or the first end bottom (4) and into the outlet end (8) of which a particle filter (7) is plugged axially from the outside, with a deflecting housing (9). The deflecting housing (9) contains a deflecting chamber (10), and has at least one inlet (11) communicating with the deflecting chamber (10) and at least one outlet (12) communicating with the deflecting chamber (10). A fastening device (13) is provided for detachably fastening the respective inlet (11) at the respective outlet end (8) of the mounting tube (6).

Abstract: A particulate matter concentration measuring apparatus configured to measure a particulate matter concentration in exhaust gas includes an exhaust gas extraction line that is branched from an exhaust line and has a flow passage cross-sectional area smaller than that of the exhaust line, a particulate matter detection filter provided in the exhaust gas extraction line and configured to catch particulate matter, a heating unit configured to heat the caught particulate matter, and a differential pressure detection unit configured to detect a differential pressure generated between an inlet and an outlet of the particulate matter detection filter. The heating unit is configured to apply about 50% or more of a calorific value for heating the particulate matter to an area making up about 30% of the particulate matter detection filter on an upstream side of an exhaust gas flow.

Abstract: A device for detecting particulates includes: a filter; a filter container; an upstream pipe; a downstream pipe; an upstream detecting unit; and a downstream detecting unit. The upstream detecting unit has a branch flow route for receiving gas from the upstream pipe, a trapping portion, a transmitting portion for transmitting an electromagnetic wave to the trapping portion, and a receiving portion for receiving an electromagnetic wave from the trapping portion. The downstream detecting unit has a branch flow route for receiving gas from the downstream pipe, a trapping portion, a transmitting portion for transmitting an electromagnetic wave to the trapping portion, and a receiving portion for receiving an electromagnetic wave from the trapping portion. The amount of the particulates trapped in the filter is detected based on a difference between detection values of the mass of the particulates trapped in the upstream and downstream trapping portions.

Abstract: It is provided a device for detecting an accumulation amount of particulates. The device has a filter for trapping particulates from a gas containing the particulates, a container 5 for containing the filter, an upstream pipe 3 provided on the upstream side of the container 5 to lead the gas into the container 5, a downstream pipe 4 provided on the downstream side of the container 5 to lead the gas after passed through the filter, a transmitting antenna 10 provided within the downstream pipe 4 to transmit an electromagnetic wave having a frequency of 30 GHz or more but not exceeding 10 THz, and a receiving antenna 11 provided within the upstream pipe 3 to receive the electromagnetic wave. An amount of the particulates trapped in the filter is detected based on an intensity of the electromagnetic wave received by the receiving antenna 11.

Abstract: An exhaust gas cleaner which can attain an improvement in the efficiency of particulate filter regeneration and has excellent durability. The exhaust gas cleaner, which purifies an exhaust gas discharged from an internal combustion engine, comprises: a gas channel through which the exhaust gas flows; and a DPF (17) disposed in the gas channel and having many pores. The DPF (17) has an introduction surface (171) which comes into contact with the exhaust gas, the surface (171) having been almost wholly coated with a microporous material (18) having micropores with a smaller pore diameter than the pores. This microporous material (18) comprises a support made of an oxygen-storing/releasing oxide having one or more elements selected from the group consisting of alkaline earth metal elements, transition metal elements, Group-12 elements, and Group-13 elements and a silver-containing catalyst deposited on the support.

Abstract: A particulate matter concentration measuring apparatus is configured to measure a concentration of particulate matter in exhaust gas flowing through an exhaust line of a diesel engine. The apparatus includes an exhaust gas extraction line diverging from the exhaust line and having a flow passage cross-sectional area smaller than a flow passage cross-sectional area of the exhaust line. A particulate matter detection filter has a cell wall and is provided in the exhaust gas extraction line. A flow velocity of the exhaust gas passing through the cell wall is more than or equal to approximately 0.02 m/s and less than or equal to approximately 2.0 m/s. A differential pressure sensing part is configured to sense a differential pressure generated between an inlet and an outlet of the particulate matter detection filter.

Abstract: When an estimated value (A value) of an accumulation amount in a filter for trapping particulate matter reaches a prescribed value A1 corresponding to a prescribed accumulation amount Qm of the particulate matter and ash (S12), the forced regeneration of the filter is performed (S20); and when the estimated value (A value) reaches the prescribed value A1 again before the elapsed time since the completion of the forced regeneration of the filter reaches a prescribed time period T1 (S12, S14), it is judged that the amount of the ash accumulated in the filter is equal to or larger than a regulation amount (cleaning is required).

Abstract: A particulate filter is provided in an exhaust system of the engine. Parameter values correlated with a flow amount of exhaust gas of the engine are determined, and differential pressure between upstream and downstream sides of the particulate filter is determined. The ratio of a variation rate of the parameter values correlated with the exhaust flow amount to a variation rate of the differential pressure is compared with a predetermined threshold value during transitional operation of the engine to determine the state of the particulate filter.

Abstract: A nitrogen-enriched gas supplying device includes a bypass passage and a gas separating membrane, so as to supply nitrogen-enriched gas to an internal combustion engine. The bypass passage introduces a part of exhaust gas from an exhaust passage of the internal combustion engine into an intake passage of the internal combustion engine. The gas separating membrane is arranged in the bypass passage. The gas separating membrane is configured to separate carbon dioxide from exhaust gas introduced into the bypass passage.

Abstract: When it is determined that fuel in use is low-cetane fuel or a present location point is at a high altitude, a map of rich combustion, exhaust gas fuel addition or a post-injection is rewritten on the occasion of reduction of NOx to inhibit a misfire. Also, deterioration of fuel consumption due to regeneration of a diesel particulate filter is inhibited by suppressing excessive discharge of smoke due to the rich combustion. Thus, an exhaust purification device of an internal combustion engine capable of achieving both of inhibition of the deterioration in the fuel consumption due to the regeneration of the diesel particulate filter and inhibition of torque shock accompanying the misfire during the rich combustion for the NOx reduction is provided.

Abstract: A motor vehicle operator interface and control algorithm convey diesel particulate filter regeneration status to the operator. The algorithm also allows new control over heretofore automatic regeneration, through limiting the inhibit function. The DPF after-treatment operator interface provides multiple status indications to the operator. In a preferred embodiment this is effected using a switched indicator lamp.

Abstract: A method and system of controlling an engine includes a control system includes an exhaust gas flow rate module generating an exhaust gas flow rate signal corresponding to a flow rate of exhaust gases. The control system further includes a temperature adjustment module that determines a temperature correction factor based on the exhaust gas flow rate and that determines a corrected temperature particulate sensor signal in response to a measured particulate temperature signal and the temperature correction factor.

Abstract: Methods and systems are provided for operating an engine having a hydrocarbon retaining system and an emission control device coupled to an engine exhaust, the engine exhaust comprising a venturi. One example method comprises, during a storing condition, routing exhaust gas through the venturi without generating a venturi action, and then to the hydrocarbon retaining system, while bypassing the emission control device, to store hydrocarbons in the hydrocarbon retaining system, and during a purging condition, routing exhaust gas through the venturi while generating venturi action, then to the emission control device, and then to the hydrocarbon retaining system, to purge stored hydrocarbons, wherein a flow of purged hydrocarbons is drawn back to the venturi via venturi action.

Abstract: This invention relates to an exhaust treatment device for an exhaust system of an internal combustion engine, particularly in a motor vehicle. The device comprises a housing in which at least one exhaust treatment insert is arranged, and which is composed of at least two housing sections at least one of which consists of a ferritic material and at least another of which consists of an austenitic material. In order to increase the thermal resistance of the device at least one ferritic housing section is secured to at least one austenitic housing section by means of a connection, wherein this connection consists of a material whose coefficient of thermal expansion lies between the coefficients of thermal expansion of the ferritic material and of the austenitic material.

Abstract: An exhaust gas purification system including an exhaust gas purification device having an oxidation catalyst device including an oxidation catalyst and a diesel particulate filter (“DPF”) arranged in order from an upstream side, or a DPF carrying an oxidation catalyst in an exhaust passage of an internal combustion engine. At regeneration of the DPF, when a catalyst temperature index temperature (Tg2), indicating a temperature of the oxidation catalyst, becomes equal to a predetermined determining temperature (Tc1) or above, a temperature of the DPF is raised by supplying an unburned fuel to the upstream side of the oxidation catalyst to thereby oxidize the unburned fuel by the oxidation catalyst. The predetermined determining temperature (Tc1) is changed according to an engine speed Ne of the internal combustion engine.

Abstract: A method for forming a diesel particulate filter is presented. The method includes provided an extruder for receiving material to be extruded such extruder being configured to converting such material into a honeycomb structure having a lower portion and an upper portion. The lower portion has a bottom surface and a pair of vertically extending sidewalls terminating along outer edges of the bottom surface. The upper portion has a pair of opposing, pitched, sidewalls having lower edges terminating along upper edges of the vertically extending sidewalls and upper edges terminating along a common edge.

Abstract: Proposed is a method for assessing the completeness of a regeneration of a particle filter which is traversed by the exhaust gas of an internal combustion engine, wherein a pressure difference which is generated across the particle filter when a flow passes through the particle filter is measured and evaluated for the assessment. The method is characterized in that a time derivative of the measured pressure difference is formed and the assessment of the completeness of the regeneration takes place as a function of the time derivative.

Abstract: A diesel engine system having an exhaust system with a catalyst and a diesel particulate filter includes a first module that determines a light-off temperature of the catalyst based on an exhaust flow rate (EFR) through the exhaust system and a second module that selectively generates an enable signal based on the light-off temperature and a catalyst temperature. A DPF regeneration sequence is enabled based on said enable signal.

Abstract: In a ceramic honeycomb structure having large numbers of flow paths partitioned by porous cell walls, the cell walls have a porosity of 55-75%, with an average pore diameter Da of 10-30 ?m and a pore area ratio Sa of 10-30% on their surfaces, and the average length La of the pores at their openings and the average width Lb of the pores at depth La from the surfaces of the cell walls meet the condition of 1.1<Lb/La<5 in an arbitrary vertical cut surface of the cell walls. In the cordierite-based ceramic honeycomb structure, the ceramic contains Fe and a spinel, the amount of the spinel being 4% or less by an X-ray diffraction intensity ratio, and most of the spinel having particle sizes in a range of 0.01-5 ?m.

Abstract: The present disclosure relates to an access joint for an engine exhaust system. The access joint includes first and second exhaust conduits each having a conduit body and a flange unitary with the conduit body. The flanges have first surfaces that face toward one another and second surfaces that face away from one another. The joint also includes a clamp having a channel that receives the flanges and that compresses the flanges toward one another when the clamp is tightened.

Abstract: An internal combustion engine exhaust gas system includes a filter arranged in an exhaust passage of the internal combustion engine, a fuel adding valve which is arranged upstream of the filter and supplies fuel into the exhaust passage, and a low-pressure exhaust gas recirculation apparatus that removes some of the exhaust gas from downstream of the filter as EGR gas. An EGR rate is controlled taking into account the amount of fuel supplied by the fuel adding valve such that an oxygen concentration of intake gas, which is drawn into a cylinder of the internal combustion engine in a state in which the EGR gas that is introduced by the low-pressure exhaust gas recirculation apparatus is mixed with air introduced into an intake passage, is constant before and after fuel is supplied by the fuel adding valve.

Abstract: An internal combustion engine is provided that performs stoichiometric burn operation under control for providing a stoichiometric air-fuel ratio as basic control for an air-fuel ratio. A particulate filter (PM filter) is provided in an exhaust passage of the engine to trap particulate matter PM contained in exhaust gas. If it is judged that the PM filter will have excessively elevated temperature, fuel cut is prohibited during deceleration. Otherwise, before the prohibition of the fuel cut, the air-fuel ratio of exhaust gas is controlled so that the atmosphere of the PM filter is brought into an atmosphere slightly leaner than the stoichiometric air-fuel ratio.

Abstract: A system includes a particulate matter (PM) filter with multiple zones. An electrical heater includes heater segments that are associated with respective ones of the zones. The electrical heater is arranged upstream from and proximate with the PM filter. A post fuel injection system injects fuel into at least one of a cylinder of an engine and an exhaust system. A control module selects one of the zones, adjusts post fuel injection based on the selected one of the zones, and electrically heats the one of the zones via a respective one of the heater segments.

Abstract: An apparatus for separating exhaust particulates from an exhaust gas stream, includes a ceramic honeycomb body with ducts through which exhaust gas can flow and which extend in the longitudinal direction of the honeycomb body, with the honeycomb body being provided with electrodes for generating an electric field which are each oriented transversally to the axis of the ducts. The electrodes are each formed by a group of ducts in which an electric conductor is introduced at least partly along their axial extension. It preferably includes a metallic coating.