Patents by Inventor Christopher RINGSTRÖM

Christopher RINGSTRÖM 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).

  • Variable valve timing internal combustion engine
    Patent number: 11619181
    Abstract: The disclosure concerns variable valve timing of a four-stroke ICE. The ICE comprises: an exhaust valve and an intake valve an exhaust camshaft an intake camshaft and a cylinder arrangement. The cylinder arrangement comprises a combustion chamber a cylinder bore and a piston. The control arrangement is configured to: perform a first sequence of changes in the timings of the exhaust and intake camshafts in order to arrive from a first camshaft timing setting at a second camshaft timing setting based on a first current maximum cylinder pressure within the combustion chamber around top dead centre fire and/or around to dead centre gas exchange.
    Type: Grant
    Filed: October 1, 2021
    Date of Patent: April 4, 2023
    Assignee: Scania CV AB
    Inventors: Andreas Dahl, Erik Lind, Christopher Ringström
  • VARIABLE VALVE TIMING INTERNAL COMBUSTION ENGINE
    Publication number: 20220112847
    Abstract: The disclosure concerns variable valve timing of a four-stroke ICE. The ICE comprises: an exhaust valve and an intake valve an exhaust camshaft an intake camshaft and a cylinder arrangement. The cylinder arrangement comprises a combustion chamber a cylinder bore and a piston. The control arrangement is configured to: perform a first sequence of changes in the timings of the exhaust and intake camshafts in order to arrive from a first camshaft timing setting at a second camshaft timing setting based on a first current maximum cylinder pressure within the combustion chamber around top dead centre fire and/or around to dead centre gas exchange.
    Type: Application
    Filed: October 1, 2021
    Publication date: April 14, 2022
    Applicant: Scania CV AB
    Inventors: Andreas DAHL, Erik LIND, Christopher RINGSTRÖM