Patents by Inventor Carl WAHLSTRÖM

Carl WAHLSTRÖM 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 and system for diagnosing an aftertreatment system
    Patent number: 11319857
    Abstract: The present invention relates to a method for diagnosing aftertreatment of exhaust gases resulting from combustion, wherein at least a first substance resulting from said combustion is reduced by supplying additive to an exhaust gas stream resulting from said combustion and use of a first reduction catalytic converter. The method includes: estimating an accumulated expected reduction of said first substance during a first period of time, determining an accumulated actual reduction of said first substance during a period of time at least substantially overlapping said first period of time, and generating a signal indicating a fault in said reduction of said first substance when said accumulated actual reduction differs from said accumulated expected reduction by a predetermined difference in occurrence of said first substance. The invention also relates to a corresponding system.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: May 3, 2022
    Assignee: Scania CV AB
    Inventors: Mikael Lundström, Sebastian Zamani, Carl Wahlström
  • METHOD AND SYSTEM FOR DIAGNOSING AN AFTERTREATMENT SYSTEM
    Publication number: 20210293172
    Abstract: The present invention relates to a method for diagnosing aftertreatment of exhaust gases resulting from combustion, wherein at least a first substance resulting from said combustion is reduced by supplying additive to an exhaust gas stream resulting from said combustion and use of a first reduction catalytic converter. The method includes: estimating an accumulated expected reduction of said first substance during a first period of time, determining an accumulated actual reduction of said first substance during a period of time at least substantially overlapping said first period of time, and generating a signal indicating a fault in said reduction of said first substance when said accumulated actual reduction differs from said accumulated expected reduction by a predetermined difference in occurrence of said first substance. The invention also relates to a corresponding system.
    Type: Application
    Filed: July 6, 2017
    Publication date: September 23, 2021
    Applicant: Scania CV AB
    Inventors: Mikael LUNDSTRÖM, Sebastian ZAMANI, Carl WAHLSTRÖM