Patents by Inventor Andreas Holmqvist

Andreas Holmqvist 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).

  • Method for controlling reductant injection for an emission reduction system of an internal combustion engine
    Patent number: 11060432
    Abstract: When an internal combustion engine is driven at a low rate below a certain threshold value, exemplary embodiments as disclosed herein allow and restrict a reductant flow to an injector in repeating allowing cycles and restricting cycles. During the allowing cycles the controller is set to keep the reductant flow as close as possible a determined low point setpoint value. During the restricted cycles the reductant flow is prevented.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: July 13, 2021
    Assignee: WÄRTSILÄ FINLAND OY
    Inventors: Timo Alho, Markus Lövholm, Andreas Holmqvist
  • METHOD FOR CONTROLLING REDUCTANT INJECTION FOR AN EMISSION REDUCTION SYSTEM OF AN INTERNAL COMBUSTION ENGINE
    Publication number: 20190072016
    Abstract: When an internal combustion engine is driven at a low rate below a certain threshold value, exemplary embodiments as disclosed herein allow and restrict a reductant flow to an injector in repeating allowing cycles and restricting cycles. During the allowing cycles the controller is set to keep the reductant flow as close as possible a determined low point setpoint value. During the restricted cycles the reductant flow is prevented.
    Type: Application
    Filed: November 9, 2018
    Publication date: March 7, 2019
    Applicant: WÄRTSILÄ FINLAND OY
    Inventors: Timo Alho, Markus Lövholm, Andreas Holmqvist