Abstract: According to one embodiment, a sensor module includes a sensor probe that has at least two arms coupled together at a central location with each of the at least two arms extending radially outwardly away from the central location. Each of the at least two arms includes one of a plurality of openings and an elongate opening extending radially along the arm. The at least two arms define fluid flow channels therein. The sensor module also includes at least one extractor coupled to the probe. The at least one extractor includes a fluid flow channel that is communicable in fluid receiving communication with fluid flowing through the fluid flow channel of at least one of the at least two arms. Further, the sensor module includes at least one sensor that is communicable in fluid sensing communication with fluid flowing through the at least one extractor.

Abstract: A method and system for determining conversion of NO to NO2 in an engine exhaust stream by an oxidation catalyst during operation of the engine is disclosed based on injecting hydrocarbon fuel into the exhaust stream upstream of the oxidation catalyst, measuring a temperature of the exhaust stream on the upstream and downstream sides of the oxidation catalyst, calculating a difference in exhaust stream temperature between the upstream and downstream sides of the oxidation catalyst, and determining the conversion of NO to NO2 by the oxidation catalyst from the difference in exhaust stream temperature based on a predetermined correlation profile between the temperatures on the upstream and downstream sides of the oxidation catalyst and conversion of NO to NO2.

Abstract: A method of controlling an exhaust treatment system, comprising: selectively determining a first control state from a plurality of control states based on an exhaust temperature and a plurality of activation temperatures; estimating a reductant dose based on the control state; and controlling an injection of a reductant to the exhaust treatment system based on the reductant dose.

Abstract: A method for operating an exhaust-gas system of an internal combustion engine having at least one particle separator and a catalytic converter, includes at least the following steps: a) carrying out processes in the internal combustion engine with lambda control about a control value; b) identifying a regeneration process of the particle separator; c) determining an oxygen demand for the regeneration process of the particle separator; and d) adapting the lambda control by the defined oxygen demand for a time period of the regeneration process of the particle separator. A motor vehicle having a spark-ignition engine and being suitable for carrying out the method, is also provided.

Abstract: Disclosed is an exhaust purification device for an internal combustion engine provided with a venturi-shaped mixing chamber (13) upstream of a NOx catalyst (16), said mixing chamber (13) formed continuously from a tapering part (13a) along which the radius decreases in the downstream direction, a waist part (13b) at which the radius is at smallest, and a widening part (13c) along which the radius increases in the downstream direction. A vane plate (18) and an aqueous urea solution spray nozzle (19) are arranged inside the tapering part (13a). The ratio (a/b) of the distance (a) between the vane plate (18) and the center of the waist part (13b) and the distance (b) between the center of the waist part (13b) and the mouth of the NOx catalyst (16) is set between 0.5 and 1.0.

Abstract: The present invention relates to a method and system for homogenizing exhaust from an engine. In one embodiment, the present invention includes an automobile. The automobile can include a fuel delivery unit, an engine, an exhaust system, and a control unit. The exhaust system can include a swirl inducement unit, multiple sensors, and multiple catalytic converters. The swirl inducement unit can homogenize an exhaust from the engine. The swirl inducement unit can include a plurality of vanes and/or a plurality of protrusions. The protrusions can be a plurality of bumps and/or a plurality of semi-circular rings. The plurality of vanes can be rotatable with the rotation of the vanes being controlled by the control unit. The rotation of the vanes can be based on an operating condition of the engine.

Abstract: A method of metering a fluid, pollutant-reducing medium, in particular an aqueous urea solution, into a motor vehicle exhaust system is proposed, in which the fluid medium is delivered to a nozzle module, in particular a nozzle or a valve, and introduced into the exhaust system by the nozzle module. A transport system arranged upstream of the nozzle module is activated with pulse-width modulation. The method and the associated metering system ensure that, in particular, a reducing agent is arranged or metered precisely and in a robust manner relative to degrees of coldness, with the use of few components.

Abstract: An exhaust gas purifying apparatus for an internal combustion engine is provided. The apparatus includes a first catalyst and a second catalyst. The first catalyst is provided in an exhaust passage of the engine, and can remove NOx in exhaust gases from the engine when an air-fuel ratio of an air-fuel mixture burning in the engine is in the vicinity of the stoichiometric ratio. The second catalyst is provided downstream of the first catalyst, an can remove NOx in the exhaust gases using a reducing agent. An execution condition of a lean operation in which the air-fuel ratio is set to a lean air-fuel ratio which is leaner than the stoichiometric ratio, is determined. When switching the air-fuel ratio from an air-fuel ratio in the vicinity of the stoichiometric ratio to the lean air-fuel ratio, the air-fuel ratio is controlled to a rich air-fuel ratio which is richer than the stoichiometric ratio, during a lean transition period from the time the execution condition is satisfied.

Abstract: An exhaust-gas cooler for a motor vehicle is provided that includes a flow path which can be traversed by exhaust gas of an internal combustion engine and which has an inlet region and an outlet region for the exhaust gas, a housing which surrounds the flow path and which has at least one inlet and at least one outlet for a liquid coolant of a coolant circuit, wherein the coolant can flow around the flow path in order to cool the exhaust gas, and wherein the coolant circuit is formed as a main cooling circuit of the internal combustion engine of the motor vehicle, wherein the exhaust-gas cooler is arranged in the main cooling circuit in series with the internal combustion engine.

Abstract: A control circuit for a vehicle powertrain includes a switch that selectivity interrupts current flow between a first terminal and a second terminal. A first power source provides power to the first terminal and a second power source provides power to the second terminal and to a heater of a heated diesel particulate filter (DPF). The switch is opened during a DPF regeneration cycle to prevent the first power source from being loaded by the heater while the heater is energized.

Abstract: An exhaust gas purifying apparatus for an internal combustion engine is provided. A selective reduction catalyst is disposed in an exhaust passage of the engine for reducing NOx in exhaust gases from the engine under existence of a reducing agent. The reducing agent or a reactant for generating the reducing agent is supplied to the upstream side of the selective reduction catalyst. Occurrence of a reducing-agent slip in which the reducing agent is discharged to the downstream side of the selective reduction catalyst is determined. A storage amount indicative of an amount of the reducing agent stored in the selective reduction catalyst is temporarily reduced from the state where the storage amount is at the maximum, and thereafter the storage amount is increased until the occurrence of the reducing-agent slip is detected. An accuracy of the reducing agent supply is determined according to an occurrence state of the reducing agent slip when the storage amount is changed.

Abstract: A diesel engine is configured to be optionally set either to a low fuel consumption mode in which the amount of fuel consumption is reduced or to a low noise mode in which the noise is reduced so that a continuous regeneration mode is automatically selected when the output value of the diesel engine is greater than a predetermined value (Ptr), the estimated amount of accumulation of particulate matter collected in a DPF is greater than or equal to a predetermined value (Vtr), a forced regeneration mode is automatically selected when the output value of the diesel engine is less than the predetermined value (Ptr) and the estimated amount of accumulation of particulate matter collected in the DPF is greater than the predetermined value (Vtr) when either the continuous regeneration mode or forced regeneration mode is manually selected, control is started depending on the selected mode.

Abstract: In a vehicle having mounted therein an engine including an injector that directly injects fuel into a cylinder, in the case in which a warm-up control required condition is established, catalyst warm-up control is executed if an amount of fuel diluted in oil is low, or even if the amount of fuel diluted in oil is high, when the temperature of the engine oil is less than the fuel volatilization temperature. In contrast, even in the case in which the warm-up control required condition is established, if the amount of fuel diluted in oil is greater than or equal to a determination value, and furthermore the temperature of the engine oil is greater than or equal to the fuel volatilization temperature, there is the possibility of negative influence on exhaust emissions, and therefore the catalyst warm-up control is prohibited.

Abstract: A method for producing ammonia for treating exhaust gas in internal combustion engines in a motor vehicle proposes that the internal combustion engine is operated with an air/fuel ratio ?<1.0, and water is added to the air/fuel mixture supplied to the internal combustion engine in order to produce the ammonia required for treating the exhaust gas on board the vehicle. And in a device for implementing the method with a means for determining the air/fuel ratio ? of the air/fuel mixture supplied to the internal combustion engine, it is proposed that an addition means for adding water to the air/fuel mixture be provided in order to produce the ammonia required for exhaust gas treatment on board the motor vehicle, the addition means being controllable depending on the determined air/fuel ratio ?.

Abstract: An exhaust gas purification device has: a bypass passage (20) disposed in an exhaust passage (15) of an internal combustion engine (10); an adsorbent (21) which is disposed in the bypass passage (20), and adsorbs unburned components in exhaust gas at a low temperature and desorbs the adsorbed unburned components at a high temperature; and an exhaust gas purification catalyst (22) which is disposed in the exhaust passage (15) at a downstream side of a portion where the bypass passage (20) merges, and purifies unburned components in exhaust gas; and a desorption amount adjustment (19) unit that adjusts the desorption amount of unburned components adsorbed by the adsorbent (21) based on an integrated fuel cut air amount (fgs), which is an integrated value of air amount taken into a combustion chamber of the internal combustion engine (10) during execution of fuel cut.

Abstract: The invention relates to a device and a method for metering liquid pollutant-reducing media into an exhaust gas duct of an exhaust gas line of an internal combustion engine, with at least one metering means which is located in or on the exhaust gas duct and downstream to which, viewed in the flow direction of the exhaust gas upstream from a catalytic converter arrangement, a baffle body is connected such that the liquid which has been metered by means of the metering means strikes a baffle body for its distribution. According to the invention the baffle body is formed by a static mixer which has a plurality of preferably single-blade guide vane plates which project away from the mixer plane at a given angle and which are aligned such that the metered liquid, especially liquid droplets, strikes the plane of the guide vane plates essentially perpendicularly.

Abstract: A particle filter arrangement for filtering exhaust gases of an internal combustion engine such as a diesel internal combustion engine, includes an inlet and an outlet and at least one particle filter arranged in the flow path of the exhaust gases between the inlet and outlet. The exhaust gases are conducted in a line, with the line having a first segment in which the exhaust gases are conducted substantially in the direction of the outlet. The line has a second segment in which the exhaust gases are conducted substantially in the direction of the inlet. An operating temperature of the arrangement sufficiently high to prevent full loading of the filter is generated particularly quickly in that the line also includes a third segment in which the exhaust gases are conducted substantially in the direction of the outlet.

Abstract: According to one embodiment, an apparatus for controlling regeneration events on multiple diesel particulate filters (DPFs) of an exhaust after-treatment system includes a regeneration event synchronization module and regeneration event termination module. The regeneration event synchronization module is configured to simultaneously initiate a regeneration event on a first DPF and a regeneration event on a second DPF in response to a regeneration event request being triggered for one of the first and second DPFs. The regeneration event termination module is configured to terminate the regeneration event on the first DPF and the regeneration event on the second DPF. Under normal operating conditions, the termination of the regeneration event on the first DPF is performed independently of the termination of the regeneration event on the second DPF.

Abstract: A method for providing a reducing agent-containing gas flow in the exhaust system of an internal combustion engine includes providing at least one reducing agent precursor, evaporating the precursor to provide a gas flow, at least partially heating the gas flow to temperatures of at least 250° C., at least partially converting the precursor in the gas flow to a reducing agent and adding the reducing agent-containing gas flow to the exhaust of the engine. The method and a device provide a reducing agent-containing gas flow in a quantity being easily controllable and adaptable to dynamic changes especially in exhaust systems of mobile applications such as automobiles. A temperature of a first zone is kept at 150° C. or just below while a temperature of a second zone is kept at more than 300° C. A hydrolysis catalytic converter is hardly cooled upon receiving the precursor as a vapor, positively affecting the method.

Abstract: A method for operating an internal combustion engine configured to operate lean of stoichiometry includes reducing temperature of a portion of an exhaust gas feedstream recirculated to an intake system of the engine, and reducing mass flowrate of particulate matter and hydrocarbons borne in the recirculated portion of the exhaust gas feedstream upstream of the heat exchanger effective to reduce deposition of particulate matter and hydrocarbons onto and adhesion to surface areas of the heat exchanger.