Patents by Inventor Ronan Le-Bras

Ronan Le-Bras 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 diagnosing the exchanger bypass flap in an exhaust gas recirculation circuit
    Patent number: 8342015
    Abstract: A method for diagnosing a failure of an EGR circuit of an engine including an EGR exchanger, an EGR valve, a bypass duct of the EGR exchanger, and a bypass flap arranged upstream from the EGR exchanger and the bypass duct to adjust a proportion of exhaust gases flowing therethrough. The EGR circuit can be activated according to a cooled mode, in which the flap is shut, or according to a bypass mode, in which the flat is open. The method carries out, during a diagnosis phase, two activations of the flap, and measures an average of variations of the EGR gas temperature at an outlet of the EGR exchanger during the diagnosis phase.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: January 1, 2013
    Assignee: Renault S.A.S.
    Inventors: Julien Allard, Clement Petit, Ronan Le-Bras
  • METHOD FOR DIAGNOSING THE EXCHANGER BYPASS FLAP IN AN EXHAUST GAS RECIRCULATION CIRCUIT
    Publication number: 20110247407
    Abstract: A method for diagnosing a failure of an EGR circuit of an engine including an EGR exchanger, an EGR valve, a bypass duct of the EGR exchanger, and a bypass flap arranged upstream from the EGR exchanger and the bypass duct to adjust a proportion of exhaust gases flowing therethrough. The EGR circuit can be activated according to a cooled mode, in which the flap is shut, or according to a bypass mode, in which the flat is open. The method carries out, during a diagnosis phase, two activations of the flap, and measures an average of variations of the EGR gas temperature at an outlet of the EGR exchanger during the diagnosis phase.
    Type: Application
    Filed: April 4, 2011
    Publication date: October 13, 2011
    Applicant: RENAULT S. A. S.
    Inventors: Julien ALLARD, Clement PETIT, Ronan LE-BRAS
  • METHOD FOR DIAGNOSING THE BYPASS FLAP OF AN EXCHANGER IN AN EXHAUST GAS RECIRCULATION SYSTEM
    Publication number: 20100307231
    Abstract: A method for diagnosing a failure of an EGR circuit in an engine that includes an EGR exchanger, an EGR valve, an EGR exchanger bypass duct, and a bypass flap located upstream from the EGR exchanger and the bypass circuit in order to adjust the proportion of exhaust gases flowing therethrough. The EGR circuit can be activated in a cooled mode in which the flap is shut and in a bypass mode in which the flap is open. The method estimates the temperature of the exhaust gases at the outlet of the EGR exchanger when the EGR circuit is in the bypass mode.
    Type: Application
    Filed: September 19, 2008
    Publication date: December 9, 2010
    Applicant: Renault S.A.S
    Inventors: Julien Allard, Clement Petit, Ronan Le Bras