Patents by Inventor Sarah E. Gnau

Sarah E. Gnau 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).

  • Methods and systems for detecting high friction within flow control devices
    Patent number: 12680518
    Abstract: Method and system for detecting a high friction within a flow control device of a fuel system are disclosed. For example, the method includes receiving a service test sequence to execute a service test, performing, in response to receiving the service test sequence, the service test to generate test data, the service test including a first test cycle with a first dither level and a second test cycle with a second dither level, wherein the second dither level is different from the first dither level. The method further includes determining whether a performance difference between the first test cycle and the second test cycle exceeds a predetermined threshold based on the test data and detecting, in response to determining that the performance difference exceeds the predetermined threshold, a presence of high friction within the flow control device.
    Type: Grant
    Filed: October 4, 2023
    Date of Patent: July 14, 2026
    Assignee: Cummins Inc.
    Inventors: Michael R. Tidwell, Sarah E. Gnau, Eric Gonzalez, Abhishek Javvaji
  • Methods and systems for detecting high friction within flow control devices
    Publication number: 20240093656
    Abstract: Method and system for detecting a high friction within a flow control device of a fuel system are disclosed. For example, the method includes receiving a service test sequence to execute a service test, performing, in response to receiving the service test sequence, the service test to generate test data, the service test including a first test cycle with a first dither level and a second test cycle with a second dither level, wherein the second dither level is different from the first dither level. The method further includes determining whether a performance difference between the first test cycle and the second test cycle exceeds a predetermined threshold based on the test data and detecting, in response to determining that the performance difference exceeds the predetermined threshold, a presence of high friction within the flow control device.
    Type: Application
    Filed: October 4, 2023
    Publication date: March 21, 2024
    Inventors: Michael R. Tidwell, Sarah E. Gnau, Eric Gonzalez, Abhishek Javvaji
  • System and method for identifying a source of high pressure leakage
    Patent number: 10591379
    Abstract: A method for identifying a source of high pressure leakage of a fuel system of an engine comprising determining pressure decay values at a first pressure and at a second pressure and identifying the source of high pressure leakage based on the pressure decay values at each pressure.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: March 17, 2020
    Assignee: Cummins Inc.
    Inventors: David Michael Carey, Shounak Mishra, Zachary L. Anslinger, Sarah E. Gnau, Srinivas K. Mulukutla, Edward Nathan Linen
  • SYSTEM AND METHOD FOR IDENTIFYING A SOURCE OF HIGH PRESSURE LEAKAGE
    Publication number: 20190360888
    Abstract: A method for identifying a source of high pressure leakage of a fuel system of an engine comprising determining pressure decay values at a first pressure and at a second pressure and identifying the source of high pressure leakage based on the pressure decay values at each pressure.
    Type: Application
    Filed: December 27, 2017
    Publication date: November 28, 2019
    Inventors: David Michael Carey, Shounak Mishra, Zachary L. Anslinger, Sarah E. Gnau, Srinivas K. Mulukutla, Edward Nathan Linen