摘要:
An aftertreatment system is provided for reducing particulate matter emission and chemical emissions in diesel engine exhaust gas. The system includes a diesel particulate filter including a plurality of diesel particulate filter units configured to engage respective cross-sectional regions of the diesel engine exhaust gas including particulate matter. Each diesel particulate filter unit includes a plurality of channels aligned in a flow direction of the diesel engine exhaust gas. The channels are selectively configured with a distinct cross-sectional area density. Additionally, each diesel particulate filter unit includes a plurality of walls separating adjacent channels of the plurality of channels, where the walls have a respective thickness. A plurality of pores are configured to vacate a distinct ratio of the area of the walls.
摘要:
A method for determining the configuration of a diesel powered system having at least one diesel-fueled power generating unit, the method including a step for determining a minimum power required from the diesel powered system in order to accomplish a specified mission, and a step for determining an operating condition of the diesel-fueled power generating unit such that the minimum power requirement is satisfied while yielding at least one of lower fuel consumption and lower emissions for the diesel powered system.
摘要:
Disclosed herein is a system for reducing NOx emissions comprising a fuel tank in fluid communication with a fuel converter, wherein the fuel converter is located down stream of the fuel tank and wherein the fuel converter comprises a catalyst composition that is operative to continuously convert heavy hydrocarbon molecules having 9 or more carbon atoms per molecule into light hydrocarbon molecules having 8 or less carbon atoms per molecule; a selective catalytic reduction catalyst reactor in fluid communication with the fuel converter and located downstream of the fuel converter; and an engine in fluid communication with the fuel tank and the selective catalytic reduction catalyst reactor, wherein the engine is located downstream of the fuel tank and upstream of the selective catalytic reduction catalyst reactor.
摘要:
The disclosed embodiments relate to a method and system for regeneration of a catalyst. The system includes an engine that creates an exhaust stream and a fuel supply adapted to supply a fuel stream to the engine. A reactor includes a catalyst and is in fluid communication with the engine to receive the exhaust stream. A sensor senses a system parameter and produces a signal corresponding to the system parameter. A controller receives the signal and directs at least a portion of the exhaust stream or at least a portion of the fuel stream to the catalyst to control a regeneration operation based on a value of the system parameter sensed by the sensor.
摘要:
A method for determining the configuration of a diesel powered system having at least one diesel-fueled power generating unit, the method including a step for determining a minimum power required from the diesel powered system in order to accomplish a specified mission, and a step for determining an operating condition of the diesel-fueled power generating unit such that the minimum power requirement is satisfied while yielding at least one of lower fuel consumption and lower emissions for the diesel powered system.
摘要:
Various methods and systems are provided for an engine system for a vehicle. In one example, the engine system includes a turbocharger including a turbine, the turbocharger configured to be driven via exhaust gas from an engine during a turbocharger mode and via the exhaust gas from the engine and mechanical output from the engine during a supercharger mode. The engine system further includes a bypass control element to decrease an amount of energy extracted from exhaust flow through the turbine in a regeneration mode of operation and to increase an amount of energy extracted from exhaust flow through the turbine during a non-regeneration mode of operation, and an aftertreatment system disposed downstream of the turbocharger and including a particulate filter.
摘要:
A method is provided including determining a first power level required from a diesel powered system. The first power level corresponds to a first proportion of a maximum power. The method also includes determining an emission output for a mission based on the first power level. The method further includes determining a second power level corresponding to a second proportion of the maximum power, wherein alternate use of the second power level and at least one of the first power level or a third power level results in a lower emission output for the mission, with the overall resulting power being proximate the minimum power required. The method also includes automatically controlling operation of the diesel powered system by using the second power level alternately with at least one of the first power level or the third power level.
摘要:
Methods and systems are provided for operating a vehicle including an engine comprising a turbocharger including a compressor and a turbine. The engine further includes a bypass path configured to selectively route gas from downstream of the compressor to upstream of the turbine. In one embodiment, the method comprises selectively increasing gas flow to the engine by adjusting gas flow through the bypass path from downstream of the compressor to upstream of the turbine. In this manner, the performance of the engine may be adjusted for various operating conditions.
摘要:
In certain embodiments, there is provided a method of operating a turbocharged system including injecting a first quantity of fuel into an engine cylinder at a first predetermined time during a second half of a compression stroke before a piston of the engine cylinder reaches top dead center of the compression stroke. The method further includes injecting a second quantity of fuel into the engine cylinder at a second predetermined time after the first predetermined time when the piston is advanced by a predetermined advance value before the piston reaches the top dead center of the compression stroke.
摘要:
Various methods and systems are provided for regenerating an exhaust gas recirculation cooler. One example method includes, initiating an EGR cooler regeneration mode, wherein the EGR cooler regeneration mode comprises changing a fuel distribution of a donor cylinder group relative to a non-donor cylinder group of an engine, and increasing at least one of engine speed or load of the engine.