Abstract: An aftertreatment system comprises an aftertreatment component. An outlet sensor is positioned downstream of the aftertreatment component. A controller is communicatively coupled to the outlet sensor. The controller is configured to interpret an outlet signal from the outlet sensor. The outlet signal is indicative of a performance of the aftertreatment component. The controller determines if the aftertreatment component has deactivated. In response to determining that the aftertreatment component has deactivated, the controller provides a catalyst active material to at least a portion of the aftertreatment component. The catalyst active material coats at least the portion of the aftertreatment component so as to remanufacture the aftertreatment component.

Abstract: An aftertreatment system comprises an aftertreatment component. An outlet sensor is positioned downstream of the aftertreatment component. A controller is communicatively coupled to the outlet sensor. The controller is configured to interpret an outlet signal from the outlet sensor. The outlet signal is indicative of a performance of the aftertreatment component. The controller determines if the aftertreatment component has deactivated. In response to determining that the aftertreatment component has deactivated, the controller provides a catalyst active material to at least a portion of the aftertreatment component. The catalyst active material coats at least the portion of the aftertreatment component so as to remanufacture the aftertreatment component.

Abstract: An aftertreatment system includes a filtration and reduction unit. The filtration and reduction unit comprises a housing defining an internal volume. A filter is disposed in the internal volume and is configured to substantially remove particulates from the exhaust gas. A selective catalytic reduction system is disposed in the internal volume downstream of the filter and is configured to selectively reduce a portion of the exhaust gas. A first catalyst is formulated to oxidize at least a portion of the exhaust gas. An intake pipe is disposed upstream of the filtration and reduction unit and configured to communicate the exhaust gas o the filtration and reduction unit. The first catalyst is disposed in the intake pipe. An exhaust pipe is disposed downstream of the filtration and reduction unit.

Abstract: An improved NOx sensor with an NH3 oxidation. A sensor module may include a support component, a NOx sensing material positioned on the support component, and an NH3 oxidation catalyst. The NH3 oxidation catalyst may be layered on top of the NOx sensing material or the NH3 oxidation catalyst may be positioned upstream of the NOx sensing material such that the NH3 oxidation catalyst selectively converts NH3 to N2 while permitting NOx through to the NOx sensing material.

Abstract: Exhaust after-treatment systems and methods are disclosed. An example system includes a selective catalytic reduction on filter (SCRF) and a selective catalytic reduction (SCR) catalyst positioned downstream of the SCRF. The system also includes a first reductant doser positioned upstream of the SCRF and a second reductant doser positioned downstream of the SCRF and upstream of the SCR catalyst. The system further includes first and second nitrogen oxide (NOx) sensors positioned upstream of the first reductant doser, a third NOx sensor positioned downstream of the SCRF and upstream of the second reductant doser, and a catalyst positioned upstream of the first reductant doser.

Abstract: An improved NOx sensor with an NH3 oxidation. A sensor module may include a support component, a NOx sensing material positioned on the support component, and an NH3 oxidation catalyst. The NH3 oxidation catalyst may be layered on top of the NOx sensing material or the NH3 oxidation catalyst may be positioned upstream of he NOx sensing material such that the NH3 oxidation catalyst selectively converts NH3 to N2 while permitting NOx through to the NOx sensing material.

Abstract: An improved NOx sensor with an NH3 oxidation catalyst. A sensor module may include a support component, a NOx sensing material positioned on the support component, and an NH3 oxidation catalyst. The NH3 oxidation catalyst may be layered on top of the NOx sensing material or the NH3 oxidation catalyst may be positioned upstream of the NOx sensing material such that the NH3 oxidation catalyst selectively converts NH3 to N2 while permitting NOx through to the NOx sensing material.

Abstract: An aftertreatment system includes a filtration and reduction unit. The filtration and reduction unit comprises a housing defining an internal volume. A filter is disposed in the internal volume and is configured to substantially remove particulates from the exhaust gas. A selective catalytic reduction system is disposed in the internal volume downstream of the filter and is configured to selectively reduce a portion of the exhaust gas. A first catalyst is formulated to oxidize at least a portion of the exhaust gas. An intake pipe is disposed upstream of the filtration and reduction unit and configured to communicate the exhaust gas o the filtration and reduction unit. The first catalyst is disposed in the intake pipe. An exhaust pipe is disposed downstream of the filtration and reduction unit.

Abstract: An aftertreatment system includes a filtration and reduction unit. The filtration and reduction unit comprises a housing defining an internal volume. A filter is disposed in the internal volume and is configured to substantially remove particulates from the exhaust gas. A selective catalytic reduction system is disposed in the internal volume downstream of the filter and is configured to selectively reduce a portion of the exhaust gas. A first catalyst is formulated to oxidize at least a portion of the exhaust gas. An intake pipe is disposed upstream of the filtration and reduction unit and configured to communicate the exhaust gas to the filtration and reduction unit. The first catalyst is disposed in the intake pipe. An exhaust pipe is disposed downstream of the filtration and reduction unit.

Abstract: An aftertreatment system includes a filtration and reduction unit. The filtration and reduction unit comprises a housing defining an internal volume. A filter is disposed in the internal volume and is configured to substantially remove particulates from the exhaust gas. A selective catalytic reduction system is disposed in the internal volume downstream of the filter and is configured to selectively reduce a portion of the exhaust gas. A first catalyst is formulated to oxidize at least a portion of the exhaust gas. An intake pipe is disposed upstream of the filtration and reduction unit and configured to communicate the exhaust gas o the filtration and reduction unit. The first catalyst is disposed in the intake pipe. An exhaust pipe is disposed downstream of the filtration and reduction unit.

Abstract: An improved NOx sensor with an NH3 oxidation catalyst. A sensor module may include a support component, a NOx sensing material positioned on the support component, and an NH3 oxidation catalyst. The NH3 oxidation catalyst may be layered on top of the NOx sensing material or the NH3 oxidation catalyst may be positioned upstream of the NOx sensing material such that the NH3 oxidation catalyst selectively converts NH3 to N2 while permitting NOx through to the NOx sensing material.

Abstract: Exhaust after-treatment systems and methods are disclosed. An example system includes a selective catalytic reduction on filter (SCRF) and a selective catalytic reduction (SCR) catalyst positioned downstream of the SCRF. The system also includes a first reductant doser positioned upstream of the SCRF and a second reductant doser positioned downstream of the SCRF and upstream of the SCR catalyst. The system further includes first and second nitrogen oxide (NOx) sensors positioned upstream of the first reductant doser, a third NOx sensor positioned downstream of the SCRF and upstream of the second reductant doser, and a catalyst positioned upstream of the first reductant doser.