Patents by Inventor Mathias Bouchez

Mathias Bouchez 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).

  • Process and device intended for nitrogen oxides elimination in an exhaust line of an internal-combustion engine
    Patent number: 6508057
    Abstract: A device for eliminating nitrogen oxides in an exhaust line of a lean-burn internal-combustion engine (1) a NOx trap (3) for trapping the nitrogen oxides, a system for regenerating the nitrogen oxides when the NOx trap is saturated, a hydrocarbon treating catalyst (2) placed upstream from the NOx trap (3), a hydrocarbon injector (4) placed upstream from hydrocarbon treating catalyst (2), a probe (7) for measuring the gas mixture strength. The hydrocarbon treating catalyst (2) is a partial (or controlled) hydrocarbon oxidation catalyst that cooperates with the NOx trap (3) for trapping the nitrogen oxides and that allows to obtain, at the outlet thereof, gases with a low oxygen (O2) concentration and with high carbon monoxide (CO) and hydrogen (H2) concentrations. A control unit is furthermore provided for recording and processing data coming from various detectors and/or stored in order to carry out effective regeneration of the NOx trap (3) without disrupting the smooth running of the engine.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: January 21, 2003
    Assignee: Institut Francais du Petrole
    Inventors: Mathias Bouchez, Gil Mabilon, Brigitte Martin, Patrick Bourges
  • Process for controlled injection of hydrocarbons into an exhaust line of an internal-combustion engine
    Patent number: 6327851
    Abstract: The present invention relates to a process for controlled injection of hydrocarbons into an exhaust line of a lean-burn internal-combustion engine, comprising catalytic elimination of the nitrogen oxides. The process according to the invention consists in injecting a certain amount of hydrocarbons upstream from the catalytic elimination, periodically and for a short time interval, by means of pulsed hydrocarbon injections. The frequency and the amplitude of the hydrocarbon pulses are preferably controlled according to the running conditions of the engine.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: December 11, 2001
    Assignee: Institut Francais du Petrole
    Inventors: Mathias Bouchez, Brigitte Martin, Patrick Bourges
  • Process for reducing emissions of oxides of nitrogen in a medium which is super-stoichiometric in oxidizing agents
    Patent number: 6217838
    Abstract: The invention concerns a process for reducing emissions of oxides of nitrogen in a medium which is super-stoichiomeitric in oxidising agents, comprising: a) a step for oxidising at least a portion of the oxides of nitrogen in the presence of an oxidation material; b) a step for injecting organic compounds which comprise at least one atom selected from carbon, hydrogen, oxygen and nitrogen; c) a step for adsorbing at least a portion of the organic compounds onto an adsorption material in the form of molecular species and/or carbonaceous residues; d) a step for selective reduction of at least a portion of the oxides of nitrogen to molecular nitrogen by at least a portion of the molecular species and/or carbonaceous residues formed on the adsorption material.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: April 17, 2001
    Assignee: Institut Francais du Petrole
    Inventors: Patrick Bourges, Mathias Bouchez, Gil Mabilon, Brigitte Martin