Patents by Inventor Yadan Tang

Yadan Tang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Systems and methods for selective catalytic reduction and/or ammonia slip catalyst sulfur protection
    Patent number: 12168951
    Abstract: 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.
    Type: Grant
    Filed: April 20, 2021
    Date of Patent: December 17, 2024
    Assignee: Cummins Inc.
    Inventors: Di Wang, Richard J. Ancimer, Michael J. Cunningham, Aleksey Yezerets, Jinyong Luo, Yadan Tang, Yuhui Zha
  • System and method to mitigate sensor failures due to water condensation
    Patent number: 11352923
    Abstract: A diagnostic system (10) is provided and includes a sensor (24) disposed downstream from an exhaust gas aftertreatment system. Also included in the diagnostic system (10) is a central diagnostic unit (35) configured to diagnose a condensation condition associated with the sensor (24) for mitigating a sensor failure due to water condensation on the sensor (24), the central diagnostic unit (35) 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 (24) is activated based on the water storage and release information.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: June 7, 2022
    Assignee: CUMMINS INC.
    Inventors: Saurabh Y. Joshi, Neal W. Currier, Aleksey Yezerets, Ashok Kumar, Tyler A. Rash, Anand Srinivasan, Di Wang, Yadan Tang
  • Recovering deactivated metal/zeolite catalysts
    Patent number: 11220944
    Abstract: 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.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: January 11, 2022
    Assignee: Cummins Inc.
    Inventors: Jinyong Luo, Ashok Kumar, Krishna Kamasamudram, Neal W. Currier, Aleksey Yezerets, Yadan Tang, Michael J. Cunningham, Di Wang
  • SYSTEMS AND METHODS FOR SELECTIVE CATALYTIC REDUCTION AND/OR AMMONIA SLIP CATALYST SULFUR PROTECTION
    Publication number: 20210324775
    Abstract: 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.
    Type: Application
    Filed: April 20, 2021
    Publication date: October 21, 2021
    Applicant: Cummins Inc.
    Inventors: Di Wang, Richard J. Ancimer, Michael J. Cunningham, Aleksey Yezerets, Jinyong Luo, Yadan Tang, Yuhui Zha
  • SYSTEM AND METHOD TO MITIGATE SENSOR FAILURES DUE TO WATER CONDENSATION
    Publication number: 20200264147
    Abstract: A diagnostic system (10) is provided and includes a sensor (24) disposed downstream from an exhaust gas aftertreatment system. Also included in the diagnostic system (10) is a central diagnostic unit (35) configured to diagnose a condensation condition associated with the sensor (24) for mitigating a sensor failure due to water condensation on the sensor (24), the central diagnostic unit (35) 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 (24) is activated based on the water storage and release information.
    Type: Application
    Filed: October 10, 2017
    Publication date: August 20, 2020
    Inventors: Saurabh Y. Joshi, Neal W. Currier, Aleksey Yezerets, Ashok Kumar, Tyler A. Rash, Anand Srinivasan, Di Want, Yadan Tang
  • RECOVERING DEACTIVATED METAL/ZEOLITE CATALYSTS
    Publication number: 20180363528
    Abstract: 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.
    Type: Application
    Filed: December 27, 2016
    Publication date: December 20, 2018
    Applicant: CUMMINS INC.
    Inventors: Jinyong Luo, Ashok Kumar, Krishna Kamasamudram, Neal W. Currier, Aleksey Yezerets, Yadan Tang, Michael J. Cunningham, Di Wang