Abstract: A diesel particulate filter includes a honeycomb structure having a plurality of elongated cell walls defining a plurality of passages and a skin layer surrounding the honeycomb structure. The filter is regenerated by oxidizing particulate matter trapped within the honeycomb structure by heating at least a portion of the honeycomb structure. A thermal gradient between the honeycomb structure and the skin layer is limited to less than a crack causing thermal gradient by utilizing at least one of maintaining a ratio of a heat capacity of the skin layer to a heat capacity of the cell walls at less than about 5, blocking at least those passages comprising a perimeter of the honeycomb structure, and heating the skin layer from an external side.

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: A control system for a power unit having a supply of fuel and a supply of reductant is disclosed. The control system may have a first sensor associated with the supply of fuel to generate a signal indicative of a quantity of fuel remaining. The control system may also have a second sensor associated with the supply of reductant to generate a signal indicative of a quantity of the reductant remaining. The control system may further have a controller in communication with the first and second sensors. The controller may be configured to affect operation of the power unit such that the remaining fuel is consumed before consumption of the remaining reductant.

Abstract: An engine, an exhaust system, and a method for reducing NOx in an exhaust stream are provided. The system comprises a first SCR catalyst, a second SCR catalyst, and a particulate filter positioned between the first and second SCR catalyst. The engine comprises an intake air system, at least one combustion chamber, and an exhaust system comprising a first SCR catalyst positioned upstream of a particulate filter and a second SCR catalyst positioned downstream of the particulate filter. The method comprises the steps of passing the exhaust through a low-temperature SCR catalyst, passing the exhaust through a particulate filter, and passing the exhaust through a high-temperature SCR catalyst.

Abstract: An engine is provided. The engine may comprise a first cylinder group including at least one cylinder configured to operate in a two-stroke engine operating mode and a second cylinder group including at least two cylinders configured to operate in a four-stroke engine operating mode. The power outputs of each of the cylinders in the first cylinder group and second cylinder group may be approximately equal.

Abstract: New technologies, such as NOx adsorber catalytic converters, are being used to meet increasingly stringent regulations on undesirable emissions, including NOx emissions. NOx adsorbers must be periodically regenerated, which requires an increased fuel consumption. The present disclosure includes a method of regenerating a NOx adsorber within a NOx adsorber catalytic converter. At least one sensor positioned downstream from the NOx adsorber senses, in the downstream exhaust, at least one of NOx, nitrous oxide and ammonia concentrations a plurality of times during a regeneration phase. The sensor is in communication with an electronic control module that includes a regeneration monitoring algorithm operable to end the regeneration phase when a time rate of change of the at least one of NOx, nitrous oxide and ammonia concentrations is after an expected plateau region begins.

Abstract: A sun shade having an elongated member laterally supported from the end of a pole by a universal joint permitting rotational and angular movement of the member with respect to the longitudinal axis of the pole itself. The pole includes a telescoping arrangement whereby the pole can be lengthened or shortened at the discretion of the user. The end of the pole opposite to its end carrying the member includes a universal mount connected to a firm anchor or support by a suitable clamp.