Patents by Inventor Yann G. Guezennec

Yann G. Guezennec 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).

  • UNIVERSAL TRACKING AIR-FUEL REGULATOR FOR INTERNAL COMBUSTION ENGINES
    Publication number: 20090266052
    Abstract: A fuel control system of an engine system comprises a pre-catalyst exhaust gas oxygen (EGO) sensor, a setpoint generator module, a sensor offset module, and a control module. The pre-catalyst EGO sensor generates a pre-catalyst EGO signal based on an air-fuel ratio of an exhaust gas. The setpoint generator module generates a desired pre-catalyst equivalence ratio (EQR) signal based on a desired EQR of the exhaust gas. The sensor offset module determines an offset value of the pre-catalyst EGO sensor. The control module generates an expected pre-catalyst EGO signal based on the desired pre-catalyst EQR signal and the offset value.
    Type: Application
    Filed: October 31, 2008
    Publication date: October 29, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Sai S.V. Rajagopalan, Kenneth P. Dudek, Sharon Liu, Stephen Yurkovich, Shawn W. Midlam-Mohler, Yann G. Guezennec, Yiran Hu
  • SYSTEMS AND METHODS FOR ESTIMATING RESIDUAL GAS FRACTION FOR INTERNAL COMBUSTION ENGINES USING ALTITUDE COMPENSATION
    Publication number: 20090076703
    Abstract: An engine control system comprises a first factor calculating module that calculates a first factor based on intake cam position (ICAM), exhaust cam position (ECAM), engine speed (RPM) and first calibration factors. A second factor calculating module calculates a second factor based on ICAM, ECAM, RPM and second calibration factors. A residual gas fraction (RGF) estimating module estimates a RGF value based on the first factor adjusted for altitude and said second factor. A method comprises calculating a first factor based on intake cam position (ICAM), exhaust cam position (ECAM), engine speed (RPM) and first calibration factors; calculating a second factor based on ICAM, ECAM, RPM and second calibration factors; and estimating a residual gas fraction (RGF) value based on the first factor adjusted for altitude and said second factor. At least one engine operating parameter is adjusted based on the RGF value.
    Type: Application
    Filed: December 27, 2007
    Publication date: March 19, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Layne K. Wiggins, Jason Meyer, Yann G. Guezennec
  • AIR FUEL RATIO CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINES
    Publication number: 20090048766
    Abstract: A fuel control system of an engine system comprises a pre-catalyst exhaust gas oxygen (EGO) sensor and a control module. The pre-catalyst EGO sensor determines a pre-catalyst EGO signal based on an oxygen concentration of an exhaust gas. The control module determines at least one fuel command and determines at least one expected oxygen concentration of the exhaust gas. The control module determines a final fuel command for the engine system based on the pre-catalyst EGO signal, the fuel command, and the expected oxygen concentration.
    Type: Application
    Filed: August 8, 2008
    Publication date: February 19, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: KENNETH P. DUDEK, SAI S.V. RAJAGOPALAN, STEPHEN YURKOVICH, YANN G. GUEZENNEC, Shawn W. Midlam-Mohler, LOUIS A. AVALLONE, IGOR ANILOVICH
  • SYSTEM AND METHOD FOR ESTIMATING VOLUMETRIC EFFICIENCY FOR ENGINES WITH INTAKE AND EXHAUST CAM PHASERS
    Publication number: 20090024296
    Abstract: An engine control module comprises a table that outputs a parked VE estimate based on an input parameter when intake and exhaust cam phasers of an engine are in a parked position. A calculation module calculates VE estimate when the intake and exhaust cam phasers are not in a parked position based on the parked VE estimate and a mathematical relationship.
    Type: Application
    Filed: December 27, 2007
    Publication date: January 22, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Layne K. Wiggins, Kenneth P. Dudek, Jason Meyer, Yann G. Guezennec
  • System and method for estimating volumetric efficiency for engines with intake and exhaust cam phasers
    Patent number: 7472013
    Abstract: An engine control module comprises a table that outputs a parked VE estimate based on an input parameter when intake and exhaust cam phasers of an engine are in a parked position. A calculation module calculates VE estimate when the intake and exhaust cam phasers are not in a parked position based on the parked VE estimate and a mathematical relationship.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: December 30, 2008
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Layne K. Wiggins, Kenneth P. Dudek, Jason Meyer, Yann G. Guezennec