Abstract: A vehicle system (100) includes a conversion catalyst (116), a temperature sensor (156), an indication device (142), and an exhaust gas aftertreatment system controller (132). The conversion catalyst (116) is configured to receive exhaust gas. The temperature sensor (156) is configured to sense a conversion catalyst temperature of the conversion catalyst (116). The indication device (142) is operable between a static state and an impure fuel alarm state. The exhaust gas aftertreatment system controller (132) is configured to receive the conversion catalyst temperature from the temperature sensor (156). The exhaust gas aftertreatment system controller (132) is also configured to compare the conversion catalyst temperature to a conversion catalyst temperature lower threshold. The exhaust gas aftertreatment system controller (132) is also configured to compare the conversion catalyst temperature to a conversion catalyst temperature upper threshold.

Abstract: A vehicle system (100) includes a conversion catalyst (116), a temperature sensor (156), an indication device (142), and an exhaust gas aftertreatment system controller (132). The conversion catalyst (116) is configured to receive exhaust gas. The temperature sensor (156) is configured to sense a conversion catalyst temperature of the conversion catalyst (116). The indication device (142) is operable between a static state and an impure fuel alarm state. The exhaust gas aftertreatment system controller (132) is configured to receive the conversion catalyst temperature from the temperature sensor (156). The exhaust gas aftertreatment system controller (132) is also configured to compare the conversion catalyst temperature to a conversion catalyst temperature lower threshold. The exhaust gas aftertreatment system controller (132) is also configured to compare the conversion catalyst temperature to a conversion catalyst temperature upper threshold.

Abstract: An aftertreatment system comprises a SCR system. A mixing assembly is positioned upstream of the SCR system and includes a housing defining a flow path for an exhaust gas. An injection port is defined on a first sidewall of the housing and oriented at a predetermined angle relative to a longitudinal axis of the flow path. A mixer is positioned within the flow path downstream of the injection port and includes a plurality of plates each positioned in the flow path. A first plate is positioned distal to the injection port and adjacent to a second sidewall of the housing opposite to the first sidewall. The first plate has a first length substantially longer than a length of the other plates and extends in a direction upstream of the mixer. An exhaust reductant injector is positioned on the first sidewall of the housing proximal to the injection port.

Abstract: An aftertreatment system comprises a SCR system. A mixing assembly is positioned upstream of the SCR system and includes a housing defining a flow path for an exhaust gas. An injection port is defined on a first sidewall of the housing and oriented at a predetermined angle relative to a longitudinal axis of the flow path. A mixer is positioned within the flow path downstream of the injection port and includes a plurality of plates each positioned in the flow path. A first plate is positioned distal to the injection port and adjacent to a second sidewall of the housing opposite to the first sidewall. The first plate has a first length substantially longer than a length of the other plates and extends in a direction upstream of the mixer. An exhaust reductant injector is positioned on the first sidewall of the housing proximal to the injection port.

Abstract: A selective catalytic reduction (SCR) system includes a mixer that has a plurality of blades spaced about a central tube. The mixer can be configured to receive a reductant and exhaust gas mixture. The SCR system also includes a closed-end tube that is downstream of the mixer and configured to receive the reductant and exhaust gas mixture from the mixer. The closed-end tube includes a closed end opposing an open end. The closed end is substantially perpendicular to an exhaust flow direction. The closed-end tube further includes a sidewall that extends between the open and closed end. The sidewall can include a plurality of perforations. The flange plate of the SCR system includes an annular disk that has a plurality of openings through which reductant and exhaust gas mixture received from the closed-end tube is flowable. The flange plate is coupled to and supports in place the closed-end tube.