Patents by Inventor Eric Dufay

Eric Dufay 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).

  • Patent number: 7934374
    Abstract: A method for regenerating a particulate filter in an exhaust system of a combustion engine. The method: (a) measures, every time the combustion engine is started, a parameter representative of a condition of the combustion engine and/or of the exhaust system, (b) when the measured parameter reveals that the engine and/or the exhaust system are cold, the parameter representative of the mass of accumulated soot measured before the engine was last turned off is frozen, (c) the deviation between the frozen mass parameter and the parameter representative of the mass measured at time t is continuously determined, and (d) when the deviation has been resolved by convergence, it is added to the frozen mass parameter and the resulting corrected value is used in an ongoing regeneration process.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: May 3, 2011
    Assignee: Renault S.A.S.
    Inventors: Celine Etcheverry, Fabien Godon, Eric Dufay, Adrien Pillot
  • Publication number: 20090199544
    Abstract: A method for regenerating a particulate filter in an exhaust system of a combustion engine. The method: (a) measures, every time the combustion engine is started, a parameter representative of a condition of the combustion engine and/or of the exhaust system, (b) when the measured parameter reveals that the engine and/or the exhaust system are cold, the parameter representative of the mass of accumulated soot measured before the engine was last turned off is frozen, (c) the deviation between the frozen mass parameter and the parameter representative of the mass measured at time t is continuously determined, and (d) when the deviation has been resolved by convergence, it is added to the frozen mass parameter and the resulting corrected value is used in an ongoing regeneration process.
    Type: Application
    Filed: November 29, 2006
    Publication date: August 13, 2009
    Applicant: RENAULT s.a.s.
    Inventors: Celine Etcheverry, Fabien Godon, Eric Dufay, Adrien Pillot
  • Publication number: 20080140296
    Abstract: The invention relates to a method of controlling a diesel engine that is equipped with a particle filter which is disposed on an exhaust gas line of said engine. The inventive method comprises the following steps, namely: an operation consisting in measuring at least one of the engine operating parameters (P); and a step comprising the regeneration (R) of the particle filter, consisting in passing exhaust gases through the filter at a temperature of between 350° C. and 500° C. The method also includes a step consisting in calculating an engine operating stability criterion (CS), comprising the calculation of at least one derivative over time of the aforementioned parameter(s) (P). According to the invention, when the temperature of the exhaust gases is less than 350° C. and when the calculated engine stability criterion (CS) is included within a predetermined range (B1-B2), the engine is regulated such that the temperature of the exhaust gases is between 350 and 500° C. over a given regeneration time (R).
    Type: Application
    Filed: February 15, 2006
    Publication date: June 12, 2008
    Applicant: RENAULT S.A.S.
    Inventors: Adrien Pillot, Eric Dufay