Patents by Inventor Roger Leirvik

Roger Leirvik 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).

  • Electrical assist for reducing emissions and torsion response delay in a hybrid electric vehicle
    Patent number: 7792628
    Abstract: In a hybrid electric vehicle powered by an internal combustion engine that produces torque and an electric machine that produces torque, a method for operating the electric machine to produce electric assist to the engine includes determining a magnitude of power requested by the vehicle operator, determining a minimum power limit and a maximum power limit of the engine that will produce a response to a torque request within a desired period following the torque request, using the magnitude of power requested, the minimum and maximum power limits of the engine to determine the upper and lower limits of the electric power assist such that the requested torque will be provided within the desired period, and operating the electric machine to provide electric power assist within said upper and lower limits.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: September 7, 2010
    Assignee: Ford Global Technologies, LLC
    Inventors: Deepak Aswani, Mattias Kroon, Andrew J. Silveri, Ihab S. Soliman, Roger Leirvik, Daniel Thörsman
  • Electrical Assist for Reducing Emissions and Torsion Response Delay in a Hybrid Electric Vehicle
    Publication number: 20090088944
    Abstract: In a hybrid electric vehicle powered by an internal combustion engine that produces torque and an electric machine that produces torque, a method for operating the electric machine to produce electric assist to the engine includes determining a magnitude of power requested by the vehicle operator, determining a minimum power limit and a maximum power limit of the engine that will produce a response to a torque request within a desired period following the torque request, using the magnitude of power requested, the minimum and maximum power limits of the engine to determine the upper and lower limits of the electric power assist such that the requested torque will be provided within the desired period, and operating the electric machine to provide electric power assist within said upper and lower limits.
    Type: Application
    Filed: September 27, 2007
    Publication date: April 2, 2009
    Inventors: Deepak Aswani, Mattias Kroon, Andrew J. Silveri, Ihab S. Soliman, Roger Leirvik, Daniel Thorsman