Cummins Emission Solutions Inc.

Behnam Bahrami

Arvind V Harinath

Stephen M Holl

Changsheng C Su

A Carl McDonald, Jr

Yi Liu

Qiang Liu

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.

Systems and methods for remanufacturing selective catalytic reduction systems

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.

Close coupled single module aftertreatment system

An improved NOsensor with an NHoxidation. A sensor module may include a support component, a NOsensing material positioned on the support component, and an NHoxidation catalyst. The NHoxidation catalyst may be layered on top of the NOsensing material or the NHoxidation catalyst may be positioned upstream of the NOsensing material such that the NHoxidation catalyst selectively converts NHto Nwhile permitting NOthrough to the NOsensing material.

Highly selective NOx sensor in the presence of NH3

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 (NO) sensors positioned upstream of the first reductant doser, a third NOsensor positioned downstream of the SCRF and upstream of the second reductant doser, and a catalyst positioned upstream of the first reductant doser.

Exhaust after-treatment system and method with dual closed-loop reductant dosing systems

An improved NOsensor with an NHoxidation catalyst. A sensor module may include a support component, a NOsensing material positioned on the support component, and an NHoxidation catalyst. The NHoxidation catalyst may be layered on top of the NOsensing material or the NHoxidation catalyst may be positioned upstream of the NOsensing material such that the NHoxidation catalyst selectively converts NHto Nwhile permitting NOthrough to the NOsensing material.

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.

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Indianapolis, IN, United States of America

Behnam Bahrami