Patents by Inventor Christopher M. Rieflin

Christopher M. Rieflin 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 controlling a variable geometry turbocharger
    Patent number: 6233934
    Abstract: A system for controlling a vehicle having an internal combustion engine and a variable geometry turbocharger includes a turbocharger sensor having an output indicative of a current turbocharger geometry Turbocharger geometry is varied by a controllable actuator. Control logic determines a desired turbocharger geometry based on the current engine conditions. Control logic determines an error signal by comparing the current turbocharger geometry to the desired turbocharger geometry. The actuator is controlled based on the error signal to change the current turbocharger geometry so as to track the desired turbocharger geometry.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: May 22, 2001
    Assignee: Detroit Diesel Corporation
    Inventors: Peter D. Church, Christopher M. Rieflin
  • Method for controlling a variable geometry turbocharger
    Patent number: 6134890
    Abstract: A system for controlling a vehicle having an internal combustion engine and a variable geometry turbocharger includes a turbocharger sensor having an output indicative of a current turbocharger geometry. Turbocharger geometry is varied by a controllable actuator. Control logic determines a desired turbocharger geometry based on the current engine conditions. Control logic determines an error signal by comparing the current turbocharger geometry to the desired turbocharger geometry. The actuator is controlled based on the error signal to change the current turbocharger geometry so as to track the desired turbocharger geometry.
    Type: Grant
    Filed: October 8, 1999
    Date of Patent: October 24, 2000
    Assignee: Detroit Diesel Corporation
    Inventors: Peter D. Church, Christopher M. Rieflin
  • System for controlling a variable geometry turbocharger
    Patent number: 6000221
    Abstract: A system for controlling a vehicle having an internal combustion engine and a variable geometry turbocharger includes a turbocharger sensor having an output indicative of a current turbocharger geometry. Turbocharger geometry is varied by a controllable actuator. Control logic determines a desired turbocharger geometry based on the current engine conditions. Control logic determines an error signal by comparing the current turbocharger geometry to the desired turbocharger geometry. The actuator is controlled based on the error signal to change the current turbocharger geometry so as to track the desired turbocharger geometry.
    Type: Grant
    Filed: November 4, 1997
    Date of Patent: December 14, 1999
    Assignee: Detroit Diesel Corporation
    Inventors: Peter D. Church, Christopher M. Rieflin