Patents by Inventor Jonathan M. Davis

Jonathan M. Davis 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).

  • Method of estimating oxygen storage capacity of catalyst
    Patent number: 11092096
    Abstract: An engine system for a vehicle includes an internal combustion engine having an exhaust gas outlet, an exhaust system having a three-way catalyst and a switch-type post oxygen sensor, and an engine control module that controls the engine system. The engine control module includes a first control logic for estimating a three-way catalyst oxygen storage capacity based on a plurality of measured inputs, a second control logic for estimating aging effects of the switch-type post oxygen sensor, and a third control logic that calculates a filtered estimated three-way catalyst oxygen storage capacity for the three-way catalyst.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: August 17, 2021
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Min Sun, Jonathan M. Davis, Andrew M. Fedewa, Scott H. Wittkopp, Brandon Bishop
  • Method of estimating oxygen storage capacity of catalyst
    Patent number: 11085848
    Abstract: A method of estimating the oxygen storage capacity of a catalyst includes providing an engine system having an internal combustion engine and an exhaust system having a catalyst and an oxygen sensor, providing a three-way catalyst observer model having a Kalman filter and a three-way catalyst kinetic model, estimating a three-way catalyst next time step state and a modeling error, linearizing the three-way catalyst observer model, filtering the estimated three-way catalyst next time step state, and calculating a covariance.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: August 10, 2021
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Min Sun, Jonathan M. Davis, Andrew M. Fedewa, Scott H. Wittkopp, Gionata Cimini
  • METHOD OF ESTIMATING OXYGEN STORAGE CAPACITY OF CATALYST
    Publication number: 20210063270
    Abstract: A method of estimating the oxygen storage capacity of a catalyst includes providing an engine system having an internal combustion engine and an exhaust system having a catalyst and an oxygen sensor, providing a three-way catalyst observer model having a Kalman filter and a three-way catalyst kinetic model, estimating a three-way catalyst next time step state and a modeling error, linearizing the three-way catalyst observer model, filtering the estimated three-way catalyst next time step state, and calculating a covariance.
    Type: Application
    Filed: September 4, 2019
    Publication date: March 4, 2021
    Inventors: Min Sun, Jonathan M. Davis, Andrew M. Fedewa, Scott MI Wittkopp, Gionata Cimini