Abstract: An aftertreatment system for treating a high-volume exhaust flow is provided. The aftertreatment system includes a filter module. The aftertreatment system also includes a conduit in fluid communication with the filter module. The aftertreatment system further includes at least one aftertreatment module in fluid communication with the conduit. The filter module is adapted to selectively receive at least one filter element therein. The at least one filter element is adapted to reduce a backpressure within the aftertreatment system. The filter module is also adapted to provide incremental levels of particulate matter reduction from the exhaust flow based, at least in part, on a number of filter elements therein.

Abstract: An aftertreatment system for treating a high-volume exhaust flow is provided. The aftertreatment system includes a first module having a first mixing element, and a second module having a second mixing element. The aftertreatment system also includes a main inlet conduit, a first inlet conduit, a second inlet conduit, a first outlet conduit, and a second outlet conduit. Each of the first inlet conduit and the second inlet conduit is adapted to split the exhaust flow downstream of the main inlet conduit into a first stream and a second stream flowing therethrough respectively. The splitting of the exhaust flow is adapted to limit a backpressure within the aftertreatment system. Each of the first mixing element and the second mixing element is adapted to improve a mixing of the first stream and the second stream within the first module and the second module respectively.

Abstract: In one aspect, an exhaust treatment system includes a first particulate filter that has an oxidation catalyst and receives an exhaust stream from an engine. The first particulate filter has a first filter body that defines a plurality of flow-through channels, each open on the inlet and outlet sides of the first filter body. The first filter body also defines a plurality of wall-flow channels, each open on one of the inlet and outlet sides and closed on the other of the inlet and outlet sides. The system also has a second particulate filter that receives the exhaust stream from the first particulate filter. The second particulate filter has a second filter body that defines a plurality of wall-flow channels, each open on one of the inlet and outlet sides of the second particulate filter and closed on the other of the inlet and outlet sides of the second particulate filter.

Abstract: An exhaust mixer provided may be used for mixing an additive, such as urea, in exhaust fluid flow. The exhaust mixer may be useful in reducing or preventing build-up of solid additive deposits by increasing efficiency of mixing of the additive. The exhaust mixer may be located at least partially within a mixing conduit and includes plurality of elongate mixing blades held in spaced configuration by a support. Each mixing blade may have a longitudinal axis extending along a longitudinal axis of the mixing conduit, wherein an injector module may be located upstream of the inlet of the mixing conduit.

Abstract: In one aspect, an exhaust treatment system includes a first particulate filter that has an oxidation catalyst and receives an exhaust stream from an engine. The first particulate filter has a first filter body that defines a plurality of flow-through channels, each open on the inlet and outlet sides of the first filter body. The first filter body also defines a plurality of wall-flow channels, each open on one of the inlet and outlet sides and closed on the other of the inlet and outlet sides. The system also has a second particulate filter that receives the exhaust stream from the first particulate filter. The second particulate filter has a second filter body that defines a plurality of wall-flow channels, each open on one of the inlet and outlet sides of the second particulate filter and closed on the other of the inlet and outlet sides of the second particulate filter.

Abstract: An exhaust mixer provided may be used for mixing an additive, such as urea, in exhaust fluid flow. The exhaust mixer may be useful in reducing or preventing build-up of solid additive deposits by increasing efficiency of mixing of the additive. The exhaust mixer may be located at least partially within a mixing conduit and includes plurality of elongate mixing blades held in spaced configuration by a support. Each mixing blade may have a longitudinal axis extending along a longitudinal axis of the mixing conduit, wherein an injector module may be located upstream of the inlet of the mixing conduit.

Abstract: A method and apparatus for controlling the operation of a turbocharged internal combustion engine 10 with an exhaust gas aftertreatment device 20, wherein the operation of a wastegate of the turbocharger is based upon the exhaust gas aftertreatment device temperature and at least one of engine speed, engine fuel injection quantity, coolant temperature, ambient temperature and barometric pressure.

Abstract: A fluid delivery system for supplying fluid to an exhaust stream of a power source is disclosed. The fluid delivery system includes a supply manifold and a plurality of supply exit orifices fluidly linked to the supply manifold to allow the fluid to exit the manifold to the exhaust stream.

Abstract: A fluid delivery system for supplying fluid to an exhaust stream of a power source is disclosed. The fluid delivery system includes a supply manifold and a plurality of supply exit orifices fluidly linked to the supply manifold to allow the fluid to exit the manifold to the exhaust stream.

Abstract: An exhaust system for an engine is disclosed. The exhaust system may include a passageway configured to receive exhaust from the engine, and a recirculation circuit. The recirculation circuit is configured to recirculate exhaust from the passageway back into the engine. The exhaust system may also include an SOx removing device disposed within the passageway upstream of the recirculation circuit, and a filter disposed within the passageway to remove particulate matter from the exhaust. The exhaust system may further include a regeneration device configured to substantially simultaneously regenerate the SOx removing device and the filter.

Abstract: A homogeneous charge compression ignition engine is set up by first identifying combinations of compression ratio and exhaust gas percentages for each speed and load across the engines operating range. These identified ratios and exhaust gas percentages can then be converted into geometric compression ratio controller settings and exhaust gas recirculation rate controller settings that are mapped against speed and load, and made available to the electronic engine controller. This provides the engine controller with a look up table of what compression ratio and exhaust gas rates should be at each speed and load. The engine controller also balances at least one of combustion phasing and energy release among a plurality of cylinders in order to enable higher load operation.

Abstract: A homogeneous charge compression ignition engine is set up by first identifying combinations of compression ratio and exhaust gas percentages for each speed and load across the engines operating range. These identified ratios and exhaust gas percentages can then be converted into geometric compression ratio controller settings and exhaust gas recirculation rate controller settings that are mapped against speed and load, and made available to the electronic engine controller. This provides the engine controller with a look up table of what compression ratio and exhaust gas rates should be at each speed and load. The engine controller also balances at least one of combustion phasing and energy release among a plurality of cylinders in order to enable higher load operation.

Abstract: A multi cylinder homogeneous charge compression ignition engine includes actuators and an engine controller configured to reduce variations in combustion phasing and/or combustion energy release among the different engine cylinders. By sensing both the phasing and magnitude of the combustion energy release, the engine controller generates control signals to combustion phase controllers and combustion energy release controllers for the engine cylinders. The control signals may be different from one another to reduce variations across the group of engine cylinders. A combustion energy release controller may be a direct injection fuel injector, and the combustion phase controller may be a variable intake valve actuator. Reducing variations in these aspects of the combustion events, allows the engine to operate at higher speeds and loads.

Abstract: A homogenous charge compression ignition engine is operated by compressing a charge mixture of air, exhaust and fuel in a combustion chamber to an autoignition condition of the fuel. The engine may facilitate a transition from a first combination of speed and load to a second combination of speed and load by changing the charge mixture and compression ratio. This may be accomplished in a consecutive engine cycle by adjusting both a fuel injector control signal and a variable valve control signal away from a nominal variable valve control signal. Thereafter in one or more subsequent engine cycles, more sluggish adjustments are made to at least one of a geometric compression ratio control signal and an exhaust gas recirculation control signal to allow the variable valve control signal to be readjusted back toward its nominal variable valve control signal setting.

Abstract: A homogeneous charge compression ignition engine operates by injecting liquid fuel directly in a combustion chamber, and mixing the fuel with recirculated exhaust and fresh air through an auto ignition condition of the fuel. The engine includes at least one turbocharger for extracting energy from the engine exhaust and using that energy to boost intake pressure of recirculated exhaust gas and fresh air. Elevated proportions of exhaust gas recirculated to the engine are attained by throttling the fresh air inlet supply. These elevated exhaust gas recirculation rates allow the HCCI engine to be operated at higher speeds and loads rendering the HCCI engine a more viable alternative to a conventional diesel engine.

Abstract: A homogeneous charge compression ignition engine operates by injecting liquid fuel directly in a combustion chamber, and mixing the fuel with recirculated exhaust and fresh air through an auto ignition condition of the fuel. The engine includes at least one turbocharger for extracting energy from the engine exhaust and using that energy to boost intake pressure of recirculated exhaust gas and fresh air. Elevated proportions of exhaust gas recirculated to the engine are attained by throttling the fresh air inlet supply. These elevated exhaust gas recirculation rates allow the HCCI engine to be operated at higher speeds and loads rendering the HCCI engine a more viable alternative to a conventional diesel engine.

Abstract: The present disclosure provides a turbocharged internal combustion engine and a method of operating the same. The method includes operating the engine in a first mode wherein fuel in injected prior to autoignition conditions in at least one cylinder of the engine. The method further includes selectively operating the engine in a second operating mode that includes fuel injection after autoignition conditions, where a value indicative of turbocharger boost pressure meets a predetermined criterion, such as boost pressure being too low. The internal combustion engine of the present disclosure includes an article have a computer readable medium with a control algorithm recorded thereon. The control algorithm includes first means for operating the engine in a homogeneous charge mode, and second means for selectively operating the engine in a mixed homogeneous charge and conventional mode, where a value indicative of a turbocharger boost pressure meets a predetermined criterion.

Abstract: An exhaust gas recirculation system for a power source, has at least one inlet port configured to receive at least a portion of a flow of exhaust produced by the power source. The exhaust gas recirculation system also has an electrode disposed upstream of the at least one inlet port and configured to charge particulate matter in the flow of exhaust. The exhaust gas recirculation system further has at least one collection surface configured to allow the at least one electrode to repel the charged particulate matter away from the at least one inlet port towards the at least one collection surface.