Abstract: System in which the depollution apparatus is associated with an oxidation catalyst-forming device, and the engine is associated with a common rail for feeding it with fuel and adapted to implement the strategy of regeneration using at least one postinjection of fuel into the cylinders. In the system, a regeneration request can be detected, a state in which the vehicle accelerator pedal is being raised can be detected, the temperature downstream from the catalyst-forming means can be acquired, and it can be determined, on the basis of this temperature, the maximum duration for applying postinjections during a stage in which the engine is returning to idling as a result of the accelerator pedal being raised, for immediately cutting off postinjection as soon as the duration of postinjection use has reached the maximum duration.

Abstract: For preventing clogging in an injection nozzle for supplying a reducing agent to exhaust gas flow on an upstream side of a reducing catalyst and for improving the efficiency of NOx purification processing, the injection nozzle 14 has a tip end portion 18 provided with a ring shaped protruding ridge 19 disposed on an outer peripheral surface of an exhaust gas downstream side end portion of the tip end portion 18 that is arranged substantially in parallel with an exhaust gas flow direction A inside an exhaust pipe 13, the ring shaped protruding ridge 19 being provided with injection hole or holes 20 drilled outward from the central axis of the injection nozzle 14, so that the reducing agent is ejected on the exhaust gas upstream side of the reduction catalyst, from the injection holes 20.

Abstract: A system for mixing exhaust gas components is provided. The system may include an exhaust passage and a substantially enclosed distribution chamber disposed within the exhaust passage. The distribution chamber may include an outer wall defining a chamber volume and at least one opening disposed in the outer wall configured to provide fluid communication between the chamber volume and the exhaust passage. An additive supply device may be configured to supply at least one exhaust gas additive to the chamber volume.

Abstract: A method and system for improving sensor accuracy of diesel emissions is disclosed. The method and system comprises changing the sensor reading as a function of sensor age to provide a more accurate measure of the diesel emissions. By estimating the degree of sensor error and then providing a gain correction factor as a function of sensor age, a more accurate measure of the diesel emissions is provided.

Abstract: The present invention provides a method for controlling regeneration of the simultaneous NOx-PM reduction apparatus having a lean NOx trap (LNT) for removing nitrogen oxide (NOx) an engine and a catalytic particulate filter (CPF) for trapping a particulate matter (PM) of the engine. According to an exemplary method, depending on the trapped PM amount in the CPF, the simultaneous NOx-PM reduction apparatus is regenerated according to a dual step regeneration including a mild regeneration at a low CPF interior temperature and a strong regeneration at a high CPF interior temperature.

Abstract: A method of using a lean NOx trap (LNT) catalyst to control vehicle engine emissions. While catalyst temperature is within a low range, the catalyst is allowed to store NOx until the catalyst is saturated. The saturated catalyst is heated to a temperature exceeding the low range. The heated catalyst is regenerated. This method can improve LNT catalyst performance at low temperatures while promoting fuel economy.

Abstract: A combustion engine exhaust assembly. The assembly comprises an exhaust gas passageway that includes a divider plate assembly. The divider plate assembly includes a body and a divider plate wherein at least one of the body and the divider plate are generally formed from a material resistant to at least one of extreme temperature conditions, extreme thermal gradient conditions, and extreme loads. The divider plate assembly is useful in distributing exhaust gases within an exhaust assembly and is generally capable of extending the useful life of an exhaust manifold, for example.

Abstract: A system and method to control engine valve operation during periods of cylinder deactivation of an internal combustion engine. Electromechanical valves are controlled in a manner to reduce fuel consumption and emissions during cylinder deactivation periods of an internal combustion engine.

Abstract: In exhaust gas purifying apparatus and method for an internal combustion engine, an abnormality determination of an NOx (Nitrogen Oxides) removing catalyst is executed on the basis of output values of both of a first exhaust gas atmosphere detecting section and a second exhaust gas atmosphere detecting section (for example, oxygen concentration sensors interposed in an exhaust passage of the engine between inlet and outlet portions of the NOx removing catalyst) from a time at which an output value of the first exhaust gas atmosphere detecting section is varied to a first predetermined value to a time at which the output value of the second exhaust gas atmosphere detecting section is reached to a second predetermined value when an exhaust gas atmosphere varying section (control unit) increases the ratio of a reducing agent in the exhaust gas.

Abstract: A low-cost catalytic article is provided for treating gaseous fluid streams such as exhaust streams from gasoline-powered engines. The articles contain residence chambers defined by chamber walls and foraminous catalytic elements that contain a catalyst composition for converting a reactant contained in the fluid stream, and deflectors, which increase the residence time of the fluid stream in the residence chamber and the contact time of the fluid stream with the catalytic element.

Abstract: A method for operating a catalytic converter used for purifying the exhaust gas of an internal combustion engine, and a device for implementing the method, which provide for an open-loop or closed-loop control of the reagent fill level in the catalytic converter to a predefined storage setpoint value. The targeted stipulation of the storage setpoint value ensures, on one hand, that in non-stationary states of the internal combustion engine, there is a sufficient quantity of reagent available for the completest possible removal of at least one unwanted exhaust-gas component, and on the other hand, a reagent slip is avoided.

Abstract: A system and method are provided for controlling regeneration of exhaust gas aftertreatment components coupled to an internal combustion engine. For example, the particulate load of a particulate filter is monitored and a road speed of the vehicle is determined. If the particulate load is greater than a particulate load threshold and the road speed is greater than a road speed threshold, regeneration of the particulate filter is initiated. As another example, the sulfur oxide load (SOx) of a NOx catalyst is also monitored, and if the SOx load is greater than a SOx threshold while the particulate filter is being regenerated, regeneration of the particulate filter is terminated and SOx regeneration of the NOx catalyst is initiated.

Abstract: The present invention provides systems and methods to improve the performance and emission control of internal combustion engines equipped with nitrogen oxides storage-reduction (“NSR”) emission control systems. The system generally includes a NSR catalyst, a fuel processor located upstream of the NSR catalyst, and at least one fuel injection port. The fuel processor converts a fuel into a reducing gas mixture comprising CO and H2. The reducing gas mixture is then fed into the NSR catalyst, where it regenerates the NSR adsorbent, reduces the NOx to nitrogen, and optionally periodically desulfates the NSR catalyst. The fuel processor generally includes one or more catalysts, which facilitate reactions such as combustion, partial oxidation, and/or reforming and help consume excess oxygen present in an engine exhaust stream. The methods of the present invention provide for NSR catalyst adsorbent regeneration using pulsed fuel flow. Control strategies are also provided.

Abstract: A method and apparatus for adding a reactant to an exhaust gas from an internal combustion engine is based on the principle of dividing the exhaust gas stream into an inner exhaust gas flow and an outer exhaust gas flow, which radially surrounds the inner exhaust gas flow. A swirl is imparted to the outer exhaust gas flow and then the reactant is added to the inner exhaust gas flow. The method and apparatus advantageously enable the reactant, in particular a reducing agent precursor and/or a reducing agent, preferably urea, in particular in aqueous solution, to be introduced into the exhaust system of the internal combustion engine without the formation of undesirable by-products, such as for example biuret, as a result of contact between the reactant and the usually relatively cool outer tubular casing of the apparatus.

Abstract: A method for enabling initiation of regeneration of a NOx adsorber catalyst. While the engine is operating to propel the vehicle, data indicative of NOx adsorption efficiency of the NOx adsorber catalyst, data indicative of temperature of exhaust gas passing through the NOx adsorber catalyst, data indicative of speed of the motor vehicle, and data indicative of engine fueling are processed according to an algorithm (10) that will enable regeneration to be initiated upon concurrence of the data indicative of NOx adsorption efficiency indicating an efficiency less than a defined efficiency, of the data indicative of temperature of exhaust gas passing through the NOx adsorber catalyst indicating a temperature suitable for initiating regeneration, of the data indicative of speed of the motor vehicle indicating vehicle speed suitable for initiating regeneration, and of the data indicative of engine torque indicating engine torque suitable for initiating regeneration.

Abstract: In an internal combustion engine, an exhaust passage is provided with a NOx storing and decomposing catalyst (20). When burning fuel under a lean air-fuel ratio, the nitrogen monoxide is adsorbed by the NOx storing and decomposing catalyst (20) and disassociated. At this time, the disassociated oxygen is held in the form of oxygen ions O? on the NOx storing and decomposing catalyst (20). By making the air-fuel ratio rich and purging part of these oxygen ions O?, the remaining oxygen ions O? are also purged. Due to this, the NOx purification performance of the NOx storing and decomposing catalyst (20) is restored.

Abstract: There are provided a NOx storage reduction catalyst which is provided in an exhaust passage for an engine, and a sulfur concentration sensor which can detect a total concentration of SOx and H2S in exhaust gas that has passed through the NOx catalyst, and a concentration of SOx in the exhaust gas. An operating state of the engine is controlled such that SOx is released from the NOx catalyst (sulfur poisoning recovery process). When a concentration of the hydrogen sulfide obtained based on the total concentration and the concentration of SOx that are detected by the sulfur concentration sensor during the sulfur poisoning recovery process exceeds a permissible limit, an operating state of the engine is controlled such that the sulfur oxide is released from the NOx catalyst, an amount of the released sulfur oxide is in a predetermined range, and the concentration of the hydrogen sulfide is reduced.

Abstract: A method and system for more safely operating a diesel engine in a methane-rich environment, such as a mine. The method includes providing a diesel engine having an air intake, a combustion chamber, and an exhaust. Methane-rich air is introduced into the engine through the air intake and mixed with diesel fuel, which is combusted. The exhaust gases are introduced into a converter comprising a bed of silica. The converter generates highly reactive hydroxyl radicals that are attracted to the combustion temperature at the cylinders. The hydroxyl radicals form supercritical water in the cylinders, and eliminate soot formation, increases engine efficiency, and reduce top combustion temperature. The disclosed methods and systems significantly reduce pollutants and the risk of explosions within or near the diesel engine. The methods and systems also result in single phase emissions, whether or not operated in a methane-rich environment.

Abstract: The improved sprayer system of the present invention utilizes a docking drogue and probe assembly to quickly and easily allow refilling of the sprayer tanks with a material from an enlarged nurse tank. The coupling of the drogue and probe allows for fluid communication, as well as electronic transmission of material data to a processor in the prime mover. This processor software also receives input regarding field data and crop data, as well as feedback data from the sprayer regarding the material application. A GPS system on the prime mover allows for tracking the spraying operation, while a time stamp in the processor software tracks the timing of the spraying operation. This system thus allows for accurate accountability and traceability for the use of materials during the spraying operation.

Abstract: In order to suppress deposition of constituent of a reducing agent (dissolved matter) in an exhaust passage of an engine enhancing an elimination rate of NOx even when temperature of an exhaust emission from the engine is low, an exhaust emission purifying apparatus is provided with an electro-generative-heat carrier provided on an upstream side of an injection nozzle that supplies the reducing agent into the exhaust emission on upstream side of a reduction catalyst in an exhaust pipe, the exhaust emission being heated to a temperature equal to or higher than a melting point of the dissolved matter whereby deposition of the dissolved matter on an inner wall surface of the exhaust pipe is suppressed to effectively use the supplied reducing agent for catalytic reduction reaction, even when the exhaust emission temperature is lower than the melting point of the dissolved matter of the reducing agent.