Patents by Inventor Wolf Kiefer

Wolf Kiefer 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 monitoring the functionality of the heating of a catalytic converter situated in an exhaust system of an internal combustion engine
    Patent number: 7997066
    Abstract: The diagnosis of the heating of a catalytic converter situated in an exhaust system of an internal combustion engine is described. The system includes monitoring the actual ignition angle intervention. A current ignition angle is acquired over a specified time and converted into a torque model used for catalytic converter heating. Using the torque model, a degree of fulfillment of executed catalytic converter heating measures is obtained and an error signal is generated by comparing the obtained degree of fulfillment to a limiting value.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: August 16, 2011
    Assignee: Bayerische Motoren Werke Aktiengesellshaft
    Inventors: Gerd Kraemer, Stefan Uhl, Wolf Kiefer, Gerhard Schulz
  • Method for Monitoring the Functionality of the Heating of a Catalytic Converter Situated in an Exhaust System of an Internal Combustion Engine
    Publication number: 20080134668
    Abstract: The diagnosis of the heating of a catalytic converter situated in an exhaust system of an internal combustion engine is described. The system includes monitoring the actual ignition angle intervention. A current ignition angle is acquired over a specified time and converted into a torque model used for catalytic converter heating. Using the torque model, a degree of fulfillment of executed catalytic converter heating measures is obtained and an error signal is generated by comparing the obtained degree of fulfillment to a limiting value.
    Type: Application
    Filed: February 19, 2008
    Publication date: June 12, 2008
    Applicant: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Gerd KRAEMER, Stefan Uhl, Wolf Kiefer, Gerhard Schulz
  • Method of operating an internal combustion powered vehicle generator with time delayed load energizing
    Patent number: 6833630
    Abstract: A method of operating a generator in a vehicle is provided, which generator is driven by an internal-combustion engine and supplies energy to a vehicle wiring system. For improving vehicle emissions, particularly after a cold start of the internal-combustion engine, the generator is not operated immediately after the starting operation but is operated only after a defined time period such that it supplies energy to the vehicle wiring system.
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: December 21, 2004
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventor: Wolf Kiefer
  • Method of operating a generator in the case of a vehicle
    Publication number: 20020145286
    Abstract: A method of operating a generator in a vehicle is provided, which generator is driven by an internal-combustion engine and supplies energy to a vehicle wiring system. For improving vehicle emissions, particularly after a cold start of the internal-combustion engine, the generator is not operated immediately after the starting operation but is operated only after a defined time period such that it supplies energy to the vehicle wiring system.
    Type: Application
    Filed: April 8, 2002
    Publication date: October 10, 2002
    Applicant: Bayerische Motoren Werke Aktiengesellschaft
    Inventor: Wolf Kiefer