Patents by Inventor Pierre Duret

Pierre Duret 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).

  • Device for the pneumatic injection of fuel into a cylinder of an internal combustion engine
    Patent number: 4890594
    Abstract: A device is provided for the pneumatic injection of fuel into a cylinder of an internal combustion engine, comprising an injection chamber in communication with the inner chamber of the cylinder through two orifices with each of which a valve is associated. The injector comprises two outlet channels each directed towards one of the orifices of said injection chamber. The valves are controlled so as to open and close simultaneously. The invention applies in particular to high power two-stroke engines.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: January 2, 1990
    Assignee: Institut Francais du Petrole
    Inventor: Pierre Duret
  • Device and method for the rapid priming of an oxidation catalyst for a two stroke engine
    Patent number: 4862689
    Abstract: A device and method are provided for rapidly priming a catalyst contained a catalytic pot for a two stroke engine wherein the hottest fraction of the exhaust gases is transferred upstream of said catalyst and the remaining fraction of the exhaust gases is transferred downstream of said catalyst, as long as said catalyst is not primed.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: September 5, 1989
    Assignee: Institut Francais du Petrole Automobiles Peugeot & Automobiles Citroen
    Inventor: Pierre Duret
  • Device and method for introducing pressurized gas into a combustion chamber of a reciprocating internal combustion engine
    Patent number: 4829958
    Abstract: A device and method for introducing pressurized gas into a combustion chamber of an engine. The device includes a duct and an intermittent obstruction member, with the placing the cylinder and the combustion chamber in communication via said obstruction member.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: May 16, 1989
    Assignee: Institut Francais du Petrole
    Inventor: Pierre Duret
  • Device and method for injecting fuel into an engine, assisted by compressed air or gas
    Patent number: 4796594
    Abstract: A device and method are provided for the pneumatic injection of fuel into an engine. The device comprises at least one auxiliary duct having two ends one of which is connected to an exhaust pipe and the other to an injection member.
    Type: Grant
    Filed: July 9, 1987
    Date of Patent: January 10, 1989
    Inventor: Pierre Duret
  • Device and method for injecting fuel into an engine, assisted by compressed air or gas
    Patent number: 4716877
    Abstract: A device and method are provided for the pneumatic injection of fuel into an engine. The device comprises at least one auxiliary duct having two ends one of which is connected to an exhaust pipe and the other to an injection member.
    Type: Grant
    Filed: December 30, 1985
    Date of Patent: January 5, 1988
    Assignees: Institut Francais du Petrole, Automobiles Peugeot, Automobiles Citroen
    Inventor: Pierre Duret
  • Device and method for injecting fuel into an engine, assisted by compressed air or gas
    Patent number: 4628888
    Abstract: A device and method are provided for the pneumatic injection of fuel into an engine. The device comprises at least one auxiliary duct having two ends one of which is connected to an exhaust pipe and the other to an injection member.
    Type: Grant
    Filed: December 30, 1985
    Date of Patent: December 16, 1986
    Assignees: Institut Francais du Petrole, Automobiles Peugeot, Automobiles Citroen
    Inventor: Pierre Duret