Patents by Inventor Per-Johan Carlsson

Per-Johan Carlsson 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 of operating a reducing agent injector
    Patent number: 12203404
    Abstract: A method of operating a reducing agent injector includes determining a reference level of toxic substances exhausted from a catalytic reduction arrangement when injecting reducing agent at the pre-set mass flow rate; controlling a reducing agent injector to inject reducing agent at a first mass flow rate, the first mass flow rate being different from the pre-set mass flow rate; determining a first level of toxic substances exhausted from the catalytic reduction arrangement after injecting reducing agent at the first mass flow rate; determining which one of the reference level of toxic substances and the first level of toxic substances being a lowest level of toxic substances; updating the pre-set mass flow rate of the predefined injection model to an updated pre-set mass flow rate as the mass flow rate causing the catalytic reduction arrangement to exhaust the lowest level of toxic substances; and controlling the reducing agent injector to inject reducing agent at the updated pre-set mass flow rate.
    Type: Grant
    Filed: October 17, 2023
    Date of Patent: January 21, 2025
    Assignee: Volvo Truck Corporation
    Inventors: Dan Stenqvist, Martin Wilhelmsson, Per-Johan Carlsson
  • METHOD OF OPERATING A REDUCING AGENT INJECTOR
    Publication number: 20240141816
    Abstract: A method of operating a reducing agent injector includes determining a reference level of toxic substances exhausted from a catalytic reduction arrangement when injecting reducing agent at the pre-set mass flow rate; controlling a reducing agent injector to inject reducing agent at a first mass flow rate, the first mass flow rate being different from the pre-set mass flow rate; determining a first level of toxic substances exhausted from the catalytic reduction arrangement after injecting reducing agent at the first mass flow rate; determining which one of the reference level of toxic substances and the first level of toxic substances being a lowest level of toxic substances; updating the pre-set mass flow rate of the predefined injection model to an updated pre-set mass flow rate as the mass flow rate causing the catalytic reduction arrangement to exhaust the lowest level of toxic substances; and controlling the reducing agent injector to inject reducing agent at the updated pre-set mass flow rate.
    Type: Application
    Filed: October 17, 2023
    Publication date: May 2, 2024
    Applicant: Volvo Truck Corporation
    Inventors: Dan STENQVIST, Martin Wilhelmsson, Per-Johan Carlsson