Patents by Inventor David Langenderfer

David Langenderfer 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).

  • Systems and methods for particulate filter regeneration with cylinder deactivation
    Patent number: 11933237
    Abstract: A system includes an exhaust aftertreatment system including a particulate filter and a controller. The controller is configured to: receive a particulate filter regeneration event trigger; receive information, the information comprising a temperature regarding the particulate filter; determine the temperature regarding the particulate filter is below a temperature threshold associated with a particulate filter regeneration event; and responsive to determining the temperature regarding the particulate filter is below the temperature threshold, command the engine to operate in a cylinder deactivation mode, whereby at least one cylinder of a plurality of cylinders of the engine is deactivated.
    Type: Grant
    Filed: June 17, 2022
    Date of Patent: March 19, 2024
    Assignees: Cummins Inc., Tula Technology, Inc.
    Inventors: J. Steven Kolhouse, David Langenderfer, David Schmidt, Vijay Srinivasan
  • SYSTEMS AND METHODS FOR PARTICULATE FILTER REGENERATION WITH CYLINDER DEACTIVATION
    Publication number: 20230407804
    Abstract: A system includes an exhaust aftertreatment system including a particulate filter and a controller. The controller is configured to: receive a particulate filter regeneration event trigger; receive information, the information comprising a temperature regarding the particulate filter; determine the temperature regarding the particulate filter is below a temperature threshold associated with a particulate filter regeneration event; and responsive to determining the temperature regarding the particulate filter is below the temperature threshold, command the engine to operate in a cylinder deactivation mode, whereby at least one cylinder of a plurality of cylinders of the engine is deactivated.
    Type: Application
    Filed: June 17, 2022
    Publication date: December 21, 2023
    Applicants: Cummins Inc., Tula Technology, Inc.
    Inventors: J. Steven Kolhouse, David Langenderfer, David Schmidt, Vijay Srinivasan
  • Variable engine braking for thermal management
    Patent number: 10947907
    Abstract: An internal combustion engine system includes an engine with a plurality of pistons housed in respective ones of a plurality of cylinders, an air intake system to provide air to the plurality of cylinders through respective ones of a plurality of intake valves, an exhaust system to release exhaust gas from the plurality of cylinders through respective one of a plurality of exhaust valves, an aftertreatment system to treat exhaust emission from the engine, and a controller coupled to at least one sensor and configured to control a variable valve actuation mechanism to provide variable engine braking for thermal management.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: March 16, 2021
    Assignee: Cummins Inc.
    Inventors: Timothy Shipp, David Langenderfer
  • VARIABLE ENGINE BRAKING FOR THERMAL MANAGEMENT
    Publication number: 20200102896
    Abstract: An internal combustion engine system includes an engine with a plurality of pistons housed in respective ones of a plurality of cylinders, an air intake system to provide air to the plurality of cylinders through respective ones of a plurality of intake valves, an exhaust system to release exhaust gas from the plurality of cylinders through respective one of a plurality of exhaust valves, an aftertreatment system to treat exhaust emission from the engine, and a controller coupled to at least one sensor and configured to control a variable valve actuation mechanism to provide variable engine braking for thermal management.
    Type: Application
    Filed: December 2, 2019
    Publication date: April 2, 2020
    Inventors: Timothy Shipp, David Langenderfer