Patents by Inventor Shankar C. Venkataraman

Shankar C. Venkataraman 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).

  • Fuel injector having a piezoelectric actuator and a sensor assembly
    Patent number: 9086041
    Abstract: A fuel injector includes a piezoelectric actuation mechanism and a sensor configuration to measure the condition of the actuation mechanism as well as an associated fuel rail. The sensor configuration includes a piezoelectric sensor with an output signal with significantly reduced distortion that accurately reflects control signals provided to the piezoelectric actuation mechanism.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: July 21, 2015
    Assignee: CUMMINS INTELLECTUAL PROPERTY, INC.
    Inventors: Syed S. Jalal, Douglas W. Memering, Richard E. Reisinger, Edward B. Manring, Jesus Carmona-Valdes, Anthony A. Shaull, Shankar C. Venkataraman, William D. Daniel, Viktor K. Walter, Lawrence C. Melton
  • FUEL INJECTOR HAVING A PIEZOELECTRIC ACTUATOR AND A SENSOR ASSEMBLY
    Publication number: 20130026257
    Abstract: A fuel injector includes a piezoelectric actuation mechanism and a sensor configuration to measure the condition of the actuation mechanism as well as an associated fuel rail. The sensor configuration includes a piezoelectric sensor with an output signal with significantly reduced distortion that accurately reflects control signals provided to the piezoelectric actuation mechanism.
    Type: Application
    Filed: January 19, 2012
    Publication date: January 31, 2013
    Applicant: CUMMINS INTELLECTUAL PROPERTY, INC.
    Inventors: Syed S. Jalal, Douglas W. Memering, Richard E. Reisinger, Edward B. Manring, Jesus Carmona-Valdes, Anthony A. Shaull, Shankar C. Venkataraman, William D. Daniel, Viktor K. Walter, Lawrence C. Melton
  • Fuel injector with injection rate control
    Patent number: 7334741
    Abstract: A closed nozzle fuel injector is provided which effectively controls the fuel injection flow rate, especially during an initial portion of an injection event, while also permitting accurate control over pilot and/or post injection flow rates at all operating conditions thereby advantageously reducing emissions and combustion noise. The injector includes a rate shaping orifice to restrict fuel flow during an initial portion of an injection event and a rate shaping sleeve mounted for movement to cause a greater flow of injection fuel during a later portion of the injection event. A damping chamber and orifice are also provided to control movement of the rate shaping sleeve.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: February 26, 2008
    Assignee: Cummins Inc.
    Inventors: Donald J. Benson, David M. Rix, Lester L. Peters, Shankar C. Venkataraman, C. Edward Morris, Jr.
  • Needle controlled fuel injector with two control valves
    Patent number: 6824081
    Abstract: An improved fuel injector is provided which effectively controls fuel injection events using two injection control valves which operate in series to control the movement of a nozzle valve element. An outer injection control valve and actuator assembly operates to control fluid pressure in a control volume adjacent an inner injection control valve thereby controlling the movement of the inner control valve which, in turn, controls fuel pressure in an inner control volume adjacent one end of the nozzle valve element. A particular design of the inner injection control valve prevents control valve oscillations thereby minimizing unwanted fuel injection variations.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: November 30, 2004
    Assignee: Cummins Inc.
    Inventors: Lester L. Peters, C. Edward Morris, David M. Rix, Shankar C. Venkataraman
  • Needle controlled fuel injector with two control valves
    Publication number: 20040000600
    Abstract: An improved fuel injector is provided which effectively controls fuel injection events using two injection control valves which operate in series to control the movement of a nozzle valve element. An outer injection control valve and actuator assembly operates to control fluid pressure in a control volume adjacent an inner injection control valve thereby controlling the movement of the inner control valve which, in turn, controls fuel pressure in an inner control volume adjacent one end of the nozzle valve element. A particular design of the inner injection control valve prevents control valve oscillations thereby minimizing unwanted fuel injection variations.
    Type: Application
    Filed: June 28, 2002
    Publication date: January 1, 2004
    Applicant: CUMMINS INC.
    Inventors: Lester L. Peters, C. Edward Morris, David M. Rix, Shankar C. Venkataraman