Abstract: An engine exhaust treatment system. The treatment system includes and a reductant injector adapted to deliver a reductant composition into an exhaust stream moving along an exhaust flow path. A selective catalytic reduction device is disposed downstream from the reductant injector. The selective catalytic reduction device is adapted to reduce an amount of NOx in exhaust gases produced by an engine by reaction of the NOx with ammonia. A basic and/or amphoteric oxide contact surface is disposed along the exhaust flow path.

Abstract: A regeneration assembly includes a first portion including a combustion chamber connected to a combustor head. The regeneration assembly also includes a second portion including a housing. The first portion is removably connectable to the second portion.

Abstract: An exhaust gas treatment system of an internal combustion engine includes a selective catalytic reduction catalyst fluidly connected to the internal combustion engine, a particulate filter fluidly connected downstream of the selective catalytic reduction catalyst, and an induction line configured to direct a portion of a filtered exhaust flow of the internal combustion engine toward an inlet of the engine.

Abstract: An exhaust gas treatment system of an internal combustion engine includes a selective catalytic reduction catalyst fluidly connected to the internal combustion engine, an oxidation catalyst fluidly connected upstream of the selective catalytic reduction catalyst, and a particulate filter fluidly connected upstream of the selective catalytic reduction catalyst. The exhaust gas treatment system further includes a recirculation line configured to direct a portion of an exhaust flow of the internal combustion engine toward an inlet of the engine.

Abstract: A fluid-injecting system includes a nozzle assembly which includes a housing defining an outlet cooling passage, an outlet control passage, at least one inlet supply passageway, and an injection orifice. The nozzle assembly also includes a shaft disposed within the housing and movable between a closed position and an open position. The fluid-injecting system further includes a first valve in fluid communication with the nozzle assembly configured to regulate the supply of a fluid through the at least one inlet passageway and a second valve in fluid communication with the nozzle assembly to regulate a flow of fluid through the outlet passageway.

Abstract: A power generation system includes a power module and an external process module. The external process module may include at least one engine support element. The power module has at least one connection zone, and the external process module has at least one connection zone that is configured to align with the at least one connection zone of the power module. The aligned connection zones of the power module and the external process module permit relatively quick and inexpensive attachment of the external process module to the power module. The at least one engine support element may be an aftertreatment element.

Abstract: An exhaust treatment system of a power source includes a filter having a housing with an inlet and an outlet, and a regeneration device disposed outside of the housing of the filter. The regeneration device is fluidly connected to the inlet of the housing. The exhaust treatment system also includes an exhaust line configured to assist in directing a portion of a filtered flow of exhaust from the filter outlet to the power source.

Abstract: A power generation system has a power source and an aftertreatment system connected to the power source. The aftertreatment system is adapted to treat an exhaust of the power source. The aftertreatment system has a particulate filter that is dimensioned to be interchangeable with a muffler.

Abstract: A method and system may be provided to perform a process for controlling NOx emissions of an target engine. In one embodiment of the invention, the process may include determining predicted NOx values based on a model reflecting a predetermined relationship between control parameters and NOx emissions, wherein the control parameters include ambient humidity, manifold pressure, manifold temperature, fuel rate, and engine speed associated with the engine. Further, the process may include adjusting the model based on a determination of whether the predicted NOx values meet a predetermined criteria associated with actual NOx values. The adjusted model may be stored in a memory associated with the engine whereby NOx emissions exhausted from the engine may be reduced based on virtual NOx emission values determined from the adjusted model.

Abstract: An emissions control system is used with a compression ignition engine capable of producing an exhaust gas stream to be treated by a reduction agent which is mixed with the exhaust gas stream to convert the exhaust gas stream prior to being directed into an SCR catalyst capable of reducing NOx in the exhaust gas stream. An exhaust gas recirculation valve is associated with the compression ignition engine for directing the exhaust gas stream back into the compression ignition engine. An electronic control unit and sensors determine whether the temperature of the exhaust gas stream is at a predetermined temperature, and if so control operation of the valve to allow a portion of the exhaust gas stream to be directed into the SCR catalyst. A bypass valve may also be provided to prevent the exhaust gas stream from entering into the SCR catalyst.

Abstract: An emissions control system is used with a compression ignition engine capable of producing an exhaust gas stream to be treated by a reduction agent which is mixed with the exhaust gas stream to convert the exhaust gas stream prior to being directed into an SCR catalyst capable of reducing NOx in the exhaust gas stream. An exhaust gas recirculation valve is associated with the compression ignition engine for directing the exhaust gas stream back into the compression ignition engine. An electronic control unit and sensors determine whether the temperature of the exhaust gas stream is at a predetermined temperature, and if so control operation of the valve to allow a portion of the exhaust gas stream to be directed into the SCR catalyst. A bypass valve may also be provided to prevent the exhaust gas stream from entering into the SCR catalyst.

Abstract: A power generation system has a power source and an aftertreatment system connected to the power source. The aftertreatment system is adapted to treat an exhaust of the power source. The aftertreatment system has a particulate filter that is dimensioned to be interchangeable with a muffler.

Abstract: A power generation system includes a power module and an external process module. The external process module may include at least one engine support element. The power module has at least one connection zone, and the external process module has at least one connection zone that is configured to align with the at least one connection zone of the power module. The aligned connection zones of the power module and the external process module permit relatively quick and inexpensive attachment of the external process module to the power module. The at least one engine support element may be an aftertreatment element.

Abstract: A method and apparatus for the treatment of blow-by gas from a crankcase of an internal combustion engine. A particle and droplet filter removes at least some of any particles or droplets in the gaseous stream. The filtered gaseous stream is passed through a primary heat exchanger, and a catalyzed soot filter downstream of the primary heat exchanger. A secondary heat exchanger may be used to heat the gaseous stream with exhaust gas from the internal combustion engine. Blow-by gases are cleaned for subsequent discharge to the ambient environment, or for reintroduction to the fuel system of the engine.

Abstract: A method and system may be provided to perform a process for controlling NOx emissions of an target engine. In one embodiment of the invention, the process may include determining predicted NOx values based on a model reflecting a predetermined relationship between control parameters and NOx emissions, wherein the control parameters include ambient humidity, manifold pressure, manifold temperature, fuel rate, and engine speed associated with the engine. Further, the process may include adjusting the model based on a determination of whether the predicted NOx values meet a predetermined criteria associated with actual NOx values. The adjusted model may be stored in a memory associated with the engine whereby NOx emissions exhausted from the engine may be reduced based on virtual NOx emission values determined from the adjusted model.

Abstract: An internal combustion engine system, particularly suitable for a motor vehicle, is provided with an intake manifold, an exhaust manifold and an exhaust gas recirculation rate control system fluidly connected to the exhaust manifold and to the intake manifold. The exhaust gas recirculation rate control system includes at least two critical-flow nozzles, each critical-flow nozzle having an intake end and output end, the intake ends being fluidly coupled to the exhaust manifold; at least one valve, each valve being fluidly coupled with at least one output end; and a control module operatively connected to each valve for controlling exhaust gas flow therethrough. Some advantages of such a system is that the exhaust gas recirculation is accurately provided with an “open-loop” control system, thereby avoiding the use of a feedback system; the flow can be accurately determined under a choked-flow operating conditions; and the system can readily handle different exhaust gas flow rates.

Abstract: An internal combustion engine system, particularly suitable for a motor vehicle, is provided with an intake manifold, an exhaust manifold and an exhaust gas recirculation rate control system fluidly connected to the exhaust manifold and to the intake manifold. The exhaust gas recirculation rate control system includes at least two critical-flow nozzles, each critical-flow nozzle having an intake end and output end, the intake ends being fluidly coupled to the exhaust manifold; at least one valve, each valve being fluidly coupled with at least one output end; and a control module operatively connected to each valve for controlling exhaust gas flow therethrough. Some advantages of such a system is that the exhaust gas recirculation is accurately provided with an “open-loop” control system, thereby avoiding the use of a feedback system; the flow can be accurately determined under a choked-flow operating conditions; and the system can readily handle different exhaust gas flow rates.

Abstract: An emissions diagnostic system is used with a compression ignition engine having an exhaust gas stream directed into an SCR catalyst capable of reducing NOx in the exhaust gas stream. The system comprises a tank for storing a solution of urea, a pump in fluid communication with the tank for drawing the solution of urea from the tank, a valve in fluid communication with the pump and the exhaust gas stream for receiving the solution of urea from the pump, an air pump connected to the valve for providing air into the valve for mixing with the solution of urea, the valve for spraying the solution of urea into the exhaust gas stream, a sensor for sensing the level of NOx emissions emitted by the SCR catalyst, and a control module connected to the sensor for determining whether the level of NOx emissions is at an acceptable level.

Abstract: A selective catalytic reduction emissions control includes a NOx-reducing reagent stored in a vessel. The system includes apparatus and a method for determining when the vessel is empty or when the vessel is filled with a substance other than an acceptable NOx-reducing reagent.

Abstract: An exhaust gas recirculation (EGR) system for a turbo-charged internal combustion engine is provided. The EGR system includes a recirculation conduit for recirculating a volume of exhaust gas from the exhaust manifold to the intake manifold; a cooling air conduit for transporting a flow of cooling air; and a gas-to-air heat exchanger disposed in operative association with the recirculation conduit and the cooling air conduit and adapted for cooling the volume of recirculated exhaust gas in the recirculation conduit. The cooling air passing through the gas-to air heat exchanger can be diverted from the pressurized intake air, cooled (ATAAC) air, or even fresh ambient air obtained from a source external to said engine and which optionally may be forcibly directed through the heat exchanger via a blower.