Patents by Inventor David J. Hajdyla

David J. Hajdyla 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).

  • Pneumatic resonator and accumulator system for control of turbocharger wastegate movement
    Patent number: 11598253
    Abstract: A wastegate system of a vehicle includes: a wastegate valve configured to regulate exhaust flow through a turbine of a turbocharger of an engine; a wastegate actuator including a lever that is mechanically coupled to the wastegate valve via one or more linkages and that is configured to move linearly based on a pressure within an interior of the wastegate actuator; a resonator that is fluidly coupled to the interior of the wastegate actuator via a first one or more hoses and that is configured to counteract force attributable to pressure changes in the exhaust from combustion events within the engine; and a regulator valve that is fluidly connected between a pneumatic source and the resonator via a second one or more hoses and that is configured to regulate the pressure within the interior of the wastegate actuator.
    Type: Grant
    Filed: May 12, 2022
    Date of Patent: March 7, 2023
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Lisa M. Marcella-O'Leary, David J. Hajdyla, Grant Brady, Bret J. Kukulis, Robert S. McAlpine
  • Cold rattle reduction control system
    Patent number: 7863843
    Abstract: A control system for controlling an electric machine (EM) of a hybrid electric vehicle is provided. The system includes: an enable module that selectively enables a motoring mode of the EM based on ambient air temperature; and an EM control module that commands the EM to provide motoring torque as a function of engine speed during the motoring mode.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: January 4, 2011
    Inventors: Goro Tamai, Frank W. Schipperijn, William L. Aldrich, III, Dean A. Hauersperger, Steven A. Tervo, David J. Hajdyla
  • Cold rattle reduction control system
    Publication number: 20070290644
    Abstract: A control system for controlling an electric machine (EM) of a hybrid electric vehicle is provided. The system includes: an enable module that selectively enables a motoring mode of the EM based on ambient air temperature; and an EM control module that commands the EM to provide motoring torque as a function of engine speed during the motoring mode.
    Type: Application
    Filed: June 16, 2006
    Publication date: December 20, 2007
    Inventors: Goro Tamai, Frank Schipperijn, William L. Aldrich, Dean A. Hauersperger, Steven A. Tervo, David J. Hajdyla