Patents by Inventor Kent Krajewski

Kent Krajewski 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).

  • Virtual turbine speed sensor
    Patent number: 7861580
    Abstract: According to one exemplary embodiment, a virtual turbine speed sensor for a multi-stage turbocharger system of an internal combustion engine is disclosed. The multi-stage turbocharger system includes at least two sequential turbochargers each having a compressor and a turbine. The virtual turbine speed sensor includes a compressor efficiency module, an inter-stage air temperature module, and a turbine speed module. The compressor efficiency module is configured to estimate an efficiency of a compressor of a first of the at least two turbochargers. The inter-stage air temperature module is configured to estimate an inter-stage temperature of air between the at least two compressors. The inter-stage temperature estimate is based at least partially on the efficiency of the compressor of the first turbocharger. The turbine speed module is configured to estimate a speed of a turbine of a second of the at least two turbochargers.
    Type: Grant
    Filed: June 23, 2008
    Date of Patent: January 4, 2011
    Assignee: Cummins IP, Inc.
    Inventors: Vivek A. Sujan, Adrian P. Dale, Jeffrey Matthews, Kent Krajewski, David Stroh, Ryo Fuchinoue
  • VIRTUAL TURBINE SPEED SENSOR
    Publication number: 20090314082
    Abstract: According to one exemplary embodiment, a virtual turbine speed sensor for a multi-stage turbocharger system of an internal combustion engine is disclosed. The multi-stage turbocharger system includes at least two sequential turbochargers each having a compressor and a turbine. The virtual turbine speed sensor includes a compressor efficiency module, an inter-stage air temperature module, and a turbine speed module. The compressor efficiency module is configured to estimate an efficiency of a compressor of a first of the at least two turbochargers. The inter-stage air temperature module is configured to estimate an inter-stage temperature of air between the at least two compressors. The inter-stage temperature estimate is based at least partially on the efficiency of the compressor of the first turbocharger. The turbine speed module is configured to estimate a speed of a turbine of a second of the at least two turbochargers.
    Type: Application
    Filed: June 23, 2008
    Publication date: December 24, 2009
    Inventors: Vivek A. Sujan, Adrian P. Dale, Jeffrey Matthews, Kent Krajewski, David Stroh, Ryo Fuchinoue