Patents by Inventor Per Gösta Edvin Andersson

Per Gösta Edvin Andersson 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).

  • Exhaust emission control system and method for removal and storage of vehicle exhaust gas nitrogen oxides during cold operation
    Patent number: 6964157
    Abstract: A system and a method for removing NOx from an internal combustion engine exhaust stream at lower temperatures, and releasing the NOx back into the exhaust stream at higher temperatures, includes an occluder with an adsorbent able to selectively adsorb NOx at temperatures below a predetermined temperature and desorb NOx at temperatures above the predetermined temperature. The system includes an engine control module that operates the engine during cold operation so as to produce an increased ratio of NO2/NO.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: November 15, 2005
    Assignee: Ricardo, Inc
    Inventors: Brad Adelman, Per Gösta Edvin Andersson