Patents by Inventor Melissa A. Zaczek

Melissa A. Zaczek 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).

  • System, method, and apparatus for delivering highly atomized diesel exhaust fluid to an exhaust aftertreatment system
    Patent number: 8888017
    Abstract: A system includes a cylindrical blend chamber having two inlets and one outlet. The outlet is fluidly coupled to a transfer line, and a nozzle is positioned downstream of the transfer line. The nozzle is fluidly coupled to an exhaust stream of an internal combustion engine. The system further includes a first inlet fluidly coupled to a diesel exhaust fluid (DEF) stream, and a second inlet fluidly coupled to an air stream. The DEF stream and the air stream intersect at a divergent angle.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: November 18, 2014
    Assignee: Cummins Inc.
    Inventors: Chetan Ponnathpur, Stephanie L. Apewokin, Steve Holl, Jim F. Burke, John Heichelbech, Andrew Myer, Melissa A. Zaczek, Yongquan Chai, Eric Burmeister, Nate Garrett
  • Detection of aftertreatment catalyst degradation
    Patent number: 8726723
    Abstract: An exemplary embodiment is a system, including an internal combustion engine fluidly coupled to an exhaust gas flowpath, an aftertreatment system disposed in the exhaust gas flowpath, where the aftertreatment system includes a NOx reduction catalyst. The exemplary system includes a processing subsystem having a controller, where the controller includes modules structured to functionally execute operations for determining a catalyst degradation. The modules include a test conditions module, a testing module, a monitoring module, and a catalyst aging module.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: May 20, 2014
    Assignee: Cummins Emission Solutions
    Inventors: James C. Clerc, Timothy M. White, Melissa Zaczek, Baohua Qi
  • SYSTEM, METHOD, AND APPARATUS FOR DELIVERING HIGHLY ATOMIZED DIESEL EXHAUST FLUID TO AN EXHAUST AFTERTREATMENT SYSTEM
    Publication number: 20120160934
    Abstract: A system includes a cylindrical blend chamber having two inlets and one outlet. The outlet is fluidly coupled to a transfer line, and a nozzle is positioned downstream of the transfer line. The nozzle is fluidly coupled to an exhaust stream of an internal combustion engine. The system further includes a first inlet fluidly coupled to a diesel exhaust fluid (DEF) stream, and a second inlet fluidly coupled to an air stream. The DEF stream and the air stream intersect at a divergent angle.
    Type: Application
    Filed: September 23, 2011
    Publication date: June 28, 2012
    Inventors: Chetan Ponnathpur, Stephanie L. Apewokin, Steve Holl, Jim F. Burke, John Heichelbech, Andrew Myer, Melissa A. Zaczek, Yongquan Chai, Eric Burmester, Nate Garrett
  • AFTERTREATMENT CATALYST DEGRADATION COMPENSATION
    Publication number: 20120067028
    Abstract: One embodiment is a method including providing an aftertreatment catalyst disposed in an exhaust stream of an internal combustion engine and a reductant that reacts with an amount of NOx in the exhaust stream in the presence of the aftertreatment catalyst. The method includes interpreting a catalyst degradation value corresponding to the aftertreatment catalyst, and interpreting a nominal reductant value. The method further includes determining an adjusted reductant value in response to the catalyst degradation value and the nominal reductant value, and injecting the reductant into the exhaust stream at a rate based on the adjusted reductant value.
    Type: Application
    Filed: August 22, 2011
    Publication date: March 22, 2012
    Inventors: James C. Clerc, Timothy M. White, Melissa A. Zaczek, Baohua Qi
  • DETECTION OF AFTERTREATMENT CATALYST DEGRADATION
    Publication number: 20120067114
    Abstract: An exemplary embodiment is a system, including an internal combustion engine fluidly coupled to an exhaust gas flowpath, an aftertreatment system disposed in the exhaust gas flowpath, where the aftertreatment system includes a NOx reduction catalyst. The exemplary system includes a processing subsystem having a controller, where the controller includes modules structured to functionally execute operations for determining a catalyst degradation. The modules include a test conditions module, a testing module, a monitoring module, and a catalyst aging module.
    Type: Application
    Filed: August 22, 2011
    Publication date: March 22, 2012
    Inventors: James C. Clerc, Timothy M. White, Melissa A. Zaczek, Bachua Qi