Cummins Inc.

Yadan Tang

Aleksey Yezerets

Di Wang

Neal W Currier

Michael J Cunningham

Ashok Kumar

Jinyong Luo

Richard J Ancimer

Krishna Kamasamudram

Yuhui Zha

Anand Srinivasan

Saurabh Yashwant Joshi

Tyler A Rash

Systems, apparatuses, and methods include predicting a sulfur exposure of one or more copper-zeolite catalysts deployed in an exhaust aftertreatment system; comparing the predicted sulfur exposure to a predefined sulfur exposure threshold; and responsive to the determination, heating the exhaust aftertreatment catalyst to a predefined heat treatment temperature for a predefined time period to desulfate the one or more copper-zeolite catalysts.

Systems and methods for selective catalytic reduction and/or ammonia slip catalyst sulfur protection

A diagnostic system () is provided and includes a sensor () disposed downstream from an exhaust gas aftertreatment system. Also included in the diagnostic system () is a central diagnostic unit () configured to diagnose a condensation condition associated with the sensor () for mitigating a sensor failure due to water condensation on the sensor (), the central diagnostic unit () performing the diagnosis on the condensation condition based on water storage and release information related to a component of the exhaust gas aftertreatment system. The sensor () is activated based on the water storage and release information.

System and method to mitigate sensor failures due to water condensation

A method of recovering selective catalytic reduction catalysts relates to metal-Zeolite based catalysts. A selective catalytic reduction catalyst service event where a metal-Zeolite based selective catalytic reduction catalyst of an exhaust aftertreatment system may perform below a threshold level of performance is determined. The selective catalytic reduction catalyst then exposed to a recovery fluid selected to facilitate movement of metal ions.

Recovering deactivated metal/zeolite catalysts

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Columbus, IN, United States of America

Yadan Tang