Patents by Inventor Venkata R. Lakkireddy

Venkata R. Lakkireddy 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).

  • On-board diagnostic methods for partial filtration filters
    Patent number: 10161284
    Abstract: A system for and method of diagnosing operation of a partial filtration filter exhaust aftertreatment system are provided. An upstream exhaust temperature value is determined in an exhaust system upstream of at least one of a diesel oxidation catalyst (DOC) component and a first partial flow filter (PFF) component. A downstream exhaust temperature value is determined in the exhaust system downstream of a second PFF component positioned downstream of the at least one of the DOC component and the first PFF component. A frequency difference is determined between a first frequency content of the upstream exhaust temperature value and a second frequency content of the downstream exhaust temperature value. If the frequency is less than a predetermined threshold, it is determined that at least one of the DOC component and the PFF component are not present in the exhaust system.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: December 25, 2018
    Assignee: Cummins Emission Solutions, Inc.
    Inventors: Michael J. Cunningham, Phanindra V. Garimella, Venkata R. Lakkireddy, Ming-Feng Hsieh
  • ON-BOARD DIAGNOSTIC METHODS FOR PARTIAL FILTRATION FILTERS
    Publication number: 20160084137
    Abstract: A system for and method of diagnosing operation of a partial filtration filter exhaust aftertreatment system are provided. An upstream exhaust temperature value is determined in an exhaust system upstream of at least one of a diesel oxidation catalyst (DOC) component and a first partial flow filter (PFF) component. A downstream exhaust temperature value is determined in the exhaust system downstream of a second PFF component positioned downstream of the at least one of the DOC component and the first PFF component. A frequency difference is determined between a first frequency content of the upstream exhaust temperature value and a second frequency content of the downstream exhaust temperature value. If the frequency is less than a predetermined threshold, it is determined that at least one of the DOC component and the PFF component are not present in the exhaust system.
    Type: Application
    Filed: September 15, 2015
    Publication date: March 24, 2016
    Applicant: Cummins Emission Solutions, Inc.
    Inventors: Michael J. Cunningham, Phanindra V. Garimella, Venkata R. Lakkireddy, Ming-Feng Hsieh