Patents by Inventor Stefan Lorengel

Stefan Lorengel 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 identifying a blockage of a dosing valve of an SCR catalytic converter system
    Patent number: 9062807
    Abstract: The invention relates to a method for identifying a blockage of one or more spray openings of a dosing valve of an SCR catalytic converter system. Said method comprises the closure of the dosing valve, the determination of a first pressure profile in the hydraulic system in the delivery module of the SCR catalytic converter system, and the determination of the stiffness of the hydraulic system from the first pressure profile. The dosing valve is subsequently opened, a second pressure profile in the hydraulic system in the delivery module of the SCR catalytic converter system is determined, and a blockage of one or more spray openings of the dosing valve is determined from the stiffness and from the second pressure profile.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: June 23, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Michael Offenhuber, Stefan Lorengel, Godehard Nentwig, Sebastian Kanne