Patents by Inventor Gerald Liu

Gerald Liu 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).

  • Patent number: 12008584
    Abstract: There is a need for more effective and efficient anomaly detection. This need can be addressed by, for example, solutions for performing/executing graph convolutional anomaly detection. In one example, a method includes identifying related graph database input data associated with a predictive entity; generating related graph feature data for the predictive entity; generating, based on the related graph feature data and using a graph convolutional neural network model, an anomaly detection score for the predictive entity, wherein at least a portion of the graph convolutional neural network model is trained using confirmation feedback data; performing an anomaly confirmation to generate the confirmation feedback data object for the predictive entity, and integrating the confirmation feedback data object for the predictive entity into the confirmation feedback data associated with the graph convolutional anomaly detection.
    Type: Grant
    Filed: October 3, 2022
    Date of Patent: June 11, 2024
    Assignee: OPTUM, INC.
    Inventors: Parker J. Erickson, Gerald Liu, Rex Shen, Devin Uner, George L Williams, Zachary Babcock, Lydia M. Narum
  • Patent number: 11982219
    Abstract: A multi-stage mixer includes a multi-stage mixer inlet, a multi-stage mixer outlet, a first flow device, and a second flow device. The multi-stage mixer inlet is configured to receive exhaust gas. The multi-stage mixer outlet is configured to provide the exhaust gas to a catalyst. The first flow device is configured to receive the exhaust gas from the multi-stage mixer inlet and to receive reductant such that the reductant is partially mixed with the exhaust gas within the first flow device. The first flow device includes a plurality of main vanes and a plurality of main vane apertures. The plurality of main vane apertures is interspaced between the plurality of main vanes. The plurality of main vane apertures is configured to receive the exhaust gas and to cooperate with the plurality of main vanes to provide the exhaust gas from the first flow device with a swirl flow.
    Type: Grant
    Filed: November 29, 2022
    Date of Patent: May 14, 2024
    Assignee: CUMMINS EMISSION SOLUTIONS INC.
    Inventors: Z. Gerald Liu, Apoorv Kalyankar, Achuth Munnannur, Niklas M. Schmidt, Roy W. Detra, Mihai Chiruta
  • Patent number: 11946404
    Abstract: Various example embodiments relate to a system that includes a nozzle. A dosing line is connected to the nozzle and a fuel dosing module. The fuel dosing module is in fluid communication with the dosing line and includes an outlet in fluid communication with the dosing line. An air inlet is positioned upstream of the outlet and is configured to receive air. A fuel inlet is positioned upstream of the outlet and is configured to receive fuel. A fuel valve is positioned upstream of the outlet and downstream of the fuel inlet and is configured to control the flow of fuel. The fuel dosing module is configured to combine the fuel and the air upstream of the outlet and downstream of the fuel valve to generate an air-fuel fluid, wherein the air-fuel fluid removes particles from the nozzle.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: April 2, 2024
    Assignee: Cummins Filtration IP, Inc.
    Inventors: Mihai Chiruta, Barry Mark Verdegan, Wassem Abdalla, Z. Gerald Liu
  • Patent number: 11905867
    Abstract: An exhaust gas aftertreatment system includes: a first sensor configured to measure a parameter in the exhaust gas aftertreatment system; a second sensor configured to measure the parameter in the exhaust gas aftertreatment system, the second sensor disposed proximate the first sensor; and at least one controller configured to alternately receive sensor values from the first sensor for a first target period of time, and receive sensor values from the second sensor for a second target period of time.
    Type: Grant
    Filed: May 10, 2022
    Date of Patent: February 20, 2024
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Nathan A. Ottinger, M. Yusuf Khan, Z. Gerald Liu, Shirish Ambadas Shimpi
  • Patent number: 11795848
    Abstract: An exhaust gas aftertreatment system includes: a first sensor configured to measure a parameter in the exhaust gas aftertreatment system; a second sensor configured to measure the parameter in the exhaust gas aftertreatment system, the second sensor disposed proximate the first sensor; and at least one controller configured to simultaneously receive sensor values from the first sensor and receive sensor values from the second sensor.
    Type: Grant
    Filed: May 12, 2022
    Date of Patent: October 24, 2023
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Nathan A. Ottinger, M. Yusuf Khan, Z. Gerald Liu, Shirish Ambadas Shimpi
  • Patent number: 11761365
    Abstract: Apparatus and method for mixing reductant in an exhaust gas flow using virtual interception. Embodiments include an exhaust gas and reductant mixer comprising a body, a first flow device, and a reductant entry port. The body defines an exhaust gas flow path having a central portion. The first flow device swirls the exhaust gas in a circumferential direction with respect to the gas flow path. The reductant entry port introduces the reductant into the gas flow path at a location downstream from the first flow device and in an introduction direction (1) offset from the central portion, and (2) opposite the circumferential direction.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: September 19, 2023
    Assignee: CUMMINS INC.
    Inventors: Z. Gerald Liu, Apoorv Kalyankar, Niklas Schmidt, Achuth Mannannur
  • Patent number: 11753975
    Abstract: An exhaust aftertreatment system for increasing fractional efficiency of diesel or gasoline particulate filters includes a particulate filter that includes a housing and a filter substrate positioned in the housing. The filter substrate is pre-conditioned with an aqueous solution or suspension configured to decompose or evaporate in response to exposure to heat so as to precondition the filter substrate.
    Type: Grant
    Filed: December 5, 2022
    Date of Patent: September 12, 2023
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Changsheng C. Su, A. Carl McDonald, Ramakrishna Gopal Dontha, Niklas M. Schmidt, Nathan A. Ottinger, Z. Gerald Liu, James C. Clerc, Yujun Wang
  • Publication number: 20230160326
    Abstract: An exhaust aftertreatment system for increasing fractional efficiency of diesel or gasoline particulate filters includes a particulate filter that includes a housing and a filter substrate positioned in the housing. The filter substrate is pre-conditioned with an aqueous solution or suspension configured to decompose or evaporate in response to exposure to heat so as to precondition the filter substrate.
    Type: Application
    Filed: December 5, 2022
    Publication date: May 25, 2023
    Applicant: CUMMINS EMISSION SOLUTIONS INC.
    Inventors: Changsheng C. Su, A. Carl McDonald, Ramakrishna Gopal Dontha, Niklas M. Schmidt, Nathan A. Ottinger, Z. Gerald Liu, James C. Clerc, Yujun Wang
  • Publication number: 20230143888
    Abstract: An aftertreatment system comprises: a housing, a SCR system disposed in the housing. A mixer is disposed upstream of the SCR system and includes: a hub, a tubular member disposed circumferentially around the hub and defining a reductant entry port, and plurality of vanes extending from the hub to the tubular member such that openings are defined between adjacent vanes. The plurality of vanes swirl the exhaust gas in a circumferential direction. A reductant injector is disposed on the housing upstream of the SCR system along a transverse axis and configured to insert a reductant into the exhaust gas flowing through the housing through the reductant entry port. The reductant is inserted at a non-zero angle with respect to the transverse axis opposite the circumferential direction to achieve virtual interception. A mixer central axis is radially offset with respect to a housing central axis of the housing.
    Type: Application
    Filed: February 11, 2021
    Publication date: May 11, 2023
    Applicant: Cummins Emission Solutions Inc.
    Inventors: Z. Gerald Liu, Apoorv Kalyankar, Achuth Munnannur
  • Publication number: 20230108543
    Abstract: A multi-stage mixer includes a multi-stage mixer inlet, a multi-stage mixer outlet, a first flow device, and a second flow device. The multi-stage mixer inlet is configured to receive exhaust gas. The multi-stage mixer outlet is configured to provide the exhaust gas to a catalyst. The first flow device is configured to receive the exhaust gas from the multi-stage mixer inlet and to receive reductant such that the reductant is partially mixed with the exhaust gas within the first flow device. The first flow device includes a plurality of main vanes and a plurality of main vane apertures. The plurality of main vane apertures is interspaced between the plurality of main vanes. The plurality of main vane apertures is configured to receive the exhaust gas and to cooperate with the plurality of main vanes to provide the exhaust gas from the first flow device with a swirl flow.
    Type: Application
    Filed: November 29, 2022
    Publication date: April 6, 2023
    Applicant: CUMMINS EMISSION SOLUTIONS INC.
    Inventors: Z. Gerald Liu, Apoorv Kalyankar, Achuth Munnannur, Niklas M. Schmidt, Roy W. Detra, Mihai Chiruta
  • Patent number: 11585253
    Abstract: A liquid reductant injector nozzle includes a first portion defining a hollow cylindrical static chamber, in fluid communication with second portion defining a hollow frustoconical converging section, which is in turn in fluid communication with a sharp edged type discharge orifice. The hollow cylindrical static chamber is in reductant receiving communication with a reductant source, and has a first and second circular opening having equal diameters. The second circular opening is downstream of the first circular opening. The hollow frustoconical converging section is in reductant receiving communication with the hollow cylindrical static chamber via the second circular opening. Reductant received from the reductant source is discharged through the discharge orifice. A sidewall of the hollow cylindrical static chamber and a frustum side of the frustoconical converging section define an angle of convergence of the liquid reductant injector nozzle relative to a plane of the second circular opening.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: February 21, 2023
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Z. Gerald Liu, Achuth Munnannur, Niklas Schmidt
  • Patent number: 11578634
    Abstract: An aftertreatment system configured to reduce constituents of an exhaust gas produced by an engine comprises an aftertreatment component and an optical assembly. The optical assembly comprises an optical emitter configured to emit light onto a face of the aftertreatment component, and an optical detector configured to detect light reflected from the face of the aftertreatment component. A controller is configured to determine at least one of an amount of NOx gases or an amount of ammonia on the face of the aftertreatment component based on an optical parameter of the detected light that has reflected from the face of the aftertreatment component.
    Type: Grant
    Filed: May 13, 2022
    Date of Patent: February 14, 2023
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Nathan A. Ottinger, Z. Gerald Liu, Yuanzhou Xi
  • Publication number: 20230025252
    Abstract: There is a need for more effective and efficient anomaly detection. This need can be addressed by, for example, solutions for performing/executing graph convolutional anomaly detection. In one example, a method includes identifying related graph database input data associated with a predictive entity; generating related graph feature data for the predictive entity; generating, based on the related graph feature data and using a graph convolutional neural network model, an anomaly detection score for the predictive entity, wherein at least a portion of the graph convolutional neural network model is trained using confirmation feedback data; performing an anomaly confirmation to generate the confirmation feedback data object for the predictive entity, and integrating the confirmation feedback data object for the predictive entity into the confirmation feedback data associated with the graph convolutional anomaly detection.
    Type: Application
    Filed: October 3, 2022
    Publication date: January 26, 2023
    Inventors: Parker J. Erickson, Gerald Liu, Rex Shen, Devin Uner, George L. Williams, Zachary Babcock, Lydia M. Narum
  • Patent number: 11542847
    Abstract: A multi-stage mixer includes a multi-stage mixer inlet, a multi-stage mixer outlet, a first flow device, and a second flow device. The multi-stage mixer inlet is configured to receive exhaust gas. The multi-stage mixer outlet is configured to provide the exhaust gas to a catalyst. The first flow device is configured to receive the exhaust gas from the multi-stage mixer inlet and to receive reductant such that the reductant is partially mixed with the exhaust gas within the first flow device. The first flow device includes a plurality of main vanes and a plurality of main vane apertures. The plurality of main vane apertures is interspaced between the plurality of main vanes. The plurality of main vane apertures is configured to receive the exhaust gas and to cooperate with the plurality of main vanes to provide the exhaust gas from the first flow device with a swirl flow.
    Type: Grant
    Filed: August 12, 2021
    Date of Patent: January 3, 2023
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Z. Gerald Liu, Apoorv Kalyankar, Achuth Munnannur, Niklas M. Schmidt, Roy W. Detra, Mihai Chiruta
  • Patent number: 11519310
    Abstract: An exhaust aftertreatment system for increasing fractional efficiency of diesel or gasoline particulate filters includes a particulate filter that includes a housing and a filter substrate positioned in the housing. The filter substrate is pre-conditioned with an aqueous solution or suspension configured to decompose or evaporate in response to exposure to heat so as to precondition the filter substrate.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: December 6, 2022
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Changsheng C. Su, A. Carl McDonald, Jr., Ramakrishna Gopal Dontha, Niklas M. Schmidt, Nathan A. Ottinger, Z. Gerald Liu, James C. Clerc, Yujun Wang
  • Patent number: 11494787
    Abstract: There is a need for more effective and efficient anomaly detection. This need can be addressed by, for example, solutions for performing/executing graph convolutional anomaly detection. In one example, a method includes identifying related graph database input data associated with a predictive entity; generating related graph feature data for the predictive entity; generating, based on the related graph feature data and using a graph convolutional neural network model, an anomaly detection score for the predictive entity, wherein at least a portion of the graph convolutional neural network model is trained using confirmation feedback data; performing an anomaly confirmation to generate the confirmation feedback data object for the predictive entity, and integrating the confirmation feedback data object for the predictive entity into the confirmation feedback data associated with the graph convolutional anomaly detection.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: November 8, 2022
    Assignee: Optum, Inc.
    Inventors: Parker J. Erickson, Gerald Liu, Rex Shen, Devin Uner, George L. Williams, Zachary Babcock, Lydia M. Narum
  • Publication number: 20220349331
    Abstract: Apparatus and method for mixing reductant in an exhaust gas flow using virtual interception. Embodiments include an exhaust gas and reductant mixer comprising a body, a first flow device, and a reductant entry port. The body defines an exhaust gas flow path having a central portion. The first flow device swirls the exhaust gas in a circumferential direction with respect to the gas flow path. The reductant entry port introduces the reductant into the gas flow path at a location downstream from the first flow device and in an introduction direction (1) offset from the central portion, and (2) opposite the circumferential direction.
    Type: Application
    Filed: September 11, 2020
    Publication date: November 3, 2022
    Inventors: Z. Gerald Liu, Apporv Kaiyankar, Niklas Schmidt, Achuth Mannannur
  • Publication number: 20220268189
    Abstract: An exhaust gas aftertreatment system includes: a first sensor configured to measure a parameter in the exhaust gas aftertreatment system; a second sensor configured to measure the parameter in the exhaust gas aftertreatment system, the second sensor disposed proximate the first sensor; and at least one controller configured to alternately receive sensor values from the first sensor for a first target period of time, and receive sensor values from the second sensor for a second target period of time.
    Type: Application
    Filed: May 10, 2022
    Publication date: August 25, 2022
    Applicant: Cummins Emission Solutions Inc.
    Inventors: Nathan A. Ottinger, M. Yusuf Khan, Z. Gerald Liu, Shirish Ambadas Shimpi
  • Publication number: 20220268195
    Abstract: An aftertreatment system configured to reduce constituents of an exhaust gas produced by an engine comprises an aftertreatment component and an optical assembly. The optical assembly comprises an optical emitter configured to emit light onto a face of the aftertreatment component, and an optical detector configured to detect light reflected from the face of the aftertreatment component. A controller is configured to determine at least one of an amount of NOx gases or an amount of ammonia on the face of the aftertreatment component based on an optical parameter of the detected light that has reflected from the face of the aftertreatment component.
    Type: Application
    Filed: May 13, 2022
    Publication date: August 25, 2022
    Applicant: CUMMINS EMISSION SOLUTIONS INC.
    Inventors: Nathan A. Ottinger, Z. Gerald Liu, Yuanzhou Xi
  • Publication number: 20220268190
    Abstract: An exhaust gas aftertreatment system includes: a first sensor configured to measure a parameter in the exhaust gas aftertreatment system; a second sensor configured to measure the parameter in the exhaust gas aftertreatment system, the second sensor disposed proximate the first sensor; and at least one controller configured to simultaneously receive sensor values from the first sensor and receive sensor values from the second sensor.
    Type: Application
    Filed: May 12, 2022
    Publication date: August 25, 2022
    Applicant: Cummins Emission Solutions Inc.
    Inventors: Nathan A. Ottinger, M. Yusuf Khan, Z. Gerald Liu, Shirish Ambadas Shimpi