Patents by Inventor Jonathan A. Stavnheim

Jonathan A. Stavnheim 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).

  • Apparatus for diagnosing failures and fault conditions in a fuel system of an internal combustion engine
    Patent number: 6526948
    Abstract: A fuel system includes a pair of electronically controllable high pressure fuel pumps operable to supply high pressure fuel from a lower pressure fuel source to a high pressure fuel collection chamber having a pressure sensor associated therewith. The fuel collection chamber feeds an electronically controllable valve operable to dispense the high pressure fuel to a fuel distribution unit supplying fuel to a number of fuel injectors. A control computer is provided for controlling the high pressure fuel pump and valve in response to requested fueling, engine speed and fuel pressure provided by the pressure sensor. The accumulator pressure profile is processed in accordance with various techniques forming part of the present invention for diagnosing pressure sensor in-range failures, fuel pump injector valve blow shut failures and failure of one of the fuel pumps.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: March 4, 2003
    Assignee: Cummins, Inc.
    Inventors: Jonathan A. Stavnheim, Stephen West, Shyamala Raghunathan
  • Apparatus for diagnosing failures and fault conditions in a fuel system of an internal combustion engine
    Patent number: 6076504
    Abstract: A fuel system includes a pair of electronically controllable high pressure fuel pumps operable to supply high pressure fuel from a lower pressure fuel source to a high pressure fuel collection chamber having a pressure sensor associated therewith. The fuel collection chamber feeds an electronically controllable valve operable to dispense the high pressure fuel to a fuel distribution unit supplying fuel to a number of fuel injectors. A control computer is provided for controlling the high pressure fuel pump and valve in response to requested fueling, engine speed and fuel pressure provided by the pressure sensor. The accumulator pressure profile is processed in accordance with various techniques forming part of the present invention for diagnosing pressure sensor in-range failures, fuel pump injector valve blow shut failures and failure of one of the fuel pumps.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: June 20, 2000
    Assignee: Cummins Engine Company, Inc.
    Inventors: Jonathan A. Stavnheim, Stephen West, Shyamala Raghunathan
  • Apparatus for controlling a fuel system of an internal combustion engine
    Patent number: 5937826
    Abstract: A fuel system includes an electronically controllable high pressure fuel pump operable to supply high pressure fuel from a lower pressure fuel source to a high pressure fuel collection chamber having a pressure sensor associated therewith. The fuel collection chamber feeds an electronically controllable valve operable to dispense the high pressure fuel to a fuel distribution unit supplying fuel to a number of fuel injectors. A control computer is provided for controlling the high pressure fuel pump and valve in response to requested fueling, engine speed and fuel pressure provided by the pressure sensor. The control computer is normally operable to drive the fuel pump as a function of fuel pressure and a reference pressure, which is based on requested fueling, and to control the valve as a function of commanded fueling, which is a function of engine speed and a reference speed based on requested fueling, and fuel pressure.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: August 17, 1999
    Assignee: Cummins Engine Company, Inc.
    Inventors: David Olson, Keith L. Musser, Stephen West, Shyamala Raghunathan, Jonathan A. Stavnheim