Patents by Inventor Pierre Barthelet

Pierre Barthelet 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).

  • Publication number: 20090049834
    Abstract: A turbocharger having a turbine housing defining a chamber for receiving exhaust gas, and a nozzle leading from the chamber. Exhaust gas flows from the nozzle through a turbine wheel in the chamber and changes direction from a radially inward direction in the nozzle to an axial direction downstream of the turbine wheel. A divider in the nozzle divides the nozzle into first-stage and second-stage nozzles. The divider has an upstream surface to guide exhaust gas through the first-stage nozzle and an opposite downstream surface to guide exhaust gas flowing through the second-stage nozzle. An axially slidable tubular piston, disposed in the turbine housing, has a radially inner surface extending along the axial direction and a non-flat upstream end surface. The piston also includes a curved flow-guiding surface causing the exhaust gas to change direction. In a closed position, the piston abuts the divider to close the second-stage nozzle.
    Type: Application
    Filed: August 21, 2007
    Publication date: February 26, 2009
    Inventors: Emmanuel Bouvier, Lorrain Sausse, Quentin Roberts, Pierre Barthelet
  • Publication number: 20090000298
    Abstract: A method of operating a turbocharger is provided, wherein the turbocharger comprises a compressor for compressing inlet air to be supplied to an internal combustion engine and an exhaust gas turbine for driving said compressor. The turbocharger further comprises an electric motor for driving said compressor operable by an electric supply system including an alternator and an electric energy storage device. A connection between said alternator and said electric energy storage device is disconnectable by a switch. According to the present invention, the method comprises the following steps: detecting a transient condition, wherein said internal combustion engine is required to be accelerated; supplying electric energy to said electric motor only from said electric energy storage device at the beginning of said transient condition until a predetermined state is reached; supplying electric energy to said electric motor from the electric supply system after said predetermined state is reached.
    Type: Application
    Filed: May 7, 2004
    Publication date: January 1, 2009
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventor: Pierre Barthelet
  • Publication number: 20080282699
    Abstract: An exemplary flow path for an electrically assisted turbocharger (220) includes a first opening to an air intake path (114) of an engine (110), the first opening positioned downstream from a compressor (224) of the turbocharger (220); a second opening to an exhaust path (116) of an engine (110), the second opening positioned upstream from the turbine (226) of the turbocharger (220); and a valve (229) controllable by a controller (240, 150, 160) wherein the controller (240, 150, 160) includes control logic for controlling the valve (229) and for controlling an electric motor (228) of the electrically assisted turbocharger (220). Various other exemplary devices, methods, systems, etc., are also disclosed.
    Type: Application
    Filed: July 23, 2004
    Publication date: November 20, 2008
    Inventors: Pierre Barthelet, Martin Verschoor
  • Publication number: 20080240906
    Abstract: A variable-vane assembly for a variable nozzle turbine comprises a nozzle ring supporting a plurality of vanes affixed to vane arms that are engaged in recesses in the inner edge of a unison ring. The unison ring is rotatable about the axis of the nozzle ring so as to pivot the vane arms, thereby pivoting the vanes in unison. A plurality of radial-axial guide pins for the unison ring are inserted into apertures in the nozzle ring and are rigidly affixed therein such that the radial-axial guide pins are non-rotatably secured to the nozzle ring with a guide portion of each radial-axial guide pin projecting axially from the face of the nozzle ring. Each guide portion defines a groove for receiving the inner edge of the unison ring such that the unison ring is restrained by the radial-axial guide pins against excessive movement in both radial and axial directions.
    Type: Application
    Filed: March 26, 2007
    Publication date: October 2, 2008
    Inventors: Pierre Barthelet, Olivier Espasa, Eric Boucher, Francis Abdl
  • Publication number: 20080173016
    Abstract: A turbocharger system for an engine comprises at least a small and a large compressor arranged in series, at least a small and a large turbine arranged in parallel and a shut-off arrangement adapted to interrupt exhaust gas flow through at least one of the small and the large turbine. Further, a method for controlling a turbocharger system for an engine having a large turbocharger with a large turbine and a small turbocharger with a small turbine comprises the steps switching off an exhaust gas flow through the large turbine and switching on an exhaust gas flow through the small turbine in a low engine speed range, switching on the exhaust gas flow through the large and small turbine in a medium engine speed range, and switching on the exhaust gas flow through the large turbine and switching off the exhaust gas flow through the small turbine in a high engine speed range.
    Type: Application
    Filed: November 11, 2004
    Publication date: July 24, 2008
    Inventor: Pierre Barthelet
  • Publication number: 20080053091
    Abstract: A method for controlling an electrically assisted turbocharger (1,20,30,40,50) is provided. The turbocharger comprises a compressor assembly (3) having a compressor wheel for compressing a fluid to an engine (7), a turbine assembly (2) having a turbine wheel driven by an exhaust gas of the engine (7) and driving the compressor wheel (2), and an electric motor (4) for electrically driving the compressor wheel. Furthermore, at least the turbine assembly (2) comprises a variation means (10,21) for varying an operational condition of the turbine assembly (2). The method comprises the steps of judging that the actual operational condition of the engine (7) requires electrical driving of the compressor wheel, controlling said variation means (10,21) in accordance with a rotational speed of the engine (7) or in accordance with an engine load, and operating the electric motor (4) to drive the compressor wheel in accordance with a target operational condition of the engine 7.
    Type: Application
    Filed: February 16, 2005
    Publication date: March 6, 2008
    Inventor: Pierre Barthelet
  • Publication number: 20080031750
    Abstract: A turbocharger housing comprises a main body (1) for bearing a shaft (2) for carrying a turbine wheel and a compressor wheel (3), and a seal portion (4) to seal a clearance between the shaft (2) and the turbocharger housing, wherein said seal portion (4) is formed by an insert (5) being fitted to the main body (1), wherein said insert (5) comprises a passage (6, 7) for supplying a fluid to said seal portion (4).
    Type: Application
    Filed: July 9, 2004
    Publication date: February 7, 2008
    Inventors: Alexandre Gomilar, Giorgio Figura, Pierre Barthelet
  • Publication number: 20070251236
    Abstract: The invention proposes a system for driving a compressor, comprising an induction motor (2) for driving the compressor (3), said induction motor including a squirrel cage rotor, and a controller (1) for controlling the induction motor, said controller comprising a memory for storing drive patterns for driving the induction motor, a first frequency generation means for generating a field frequency based on a field command and/or a second field generation means for generating a voltage frequency based on a voltage command, wherein a drive pattern in extracted from the memory based on the generated frequency or frequencies. Alternatively, the invention proposes a system for driving a compressor, comprising an induction motor (2) for driving the compressor (3), said induction motor including a squirrel cage rotor, and a controller (1) for controlling the induction motor, wherein the controller is adapted to distinguish between a steady state and a transient state of the induction motor.
    Type: Application
    Filed: February 5, 2004
    Publication date: November 1, 2007
    Inventors: Pierre Barthelet, Nicolas Devulder, Chris Greentree, Cedric Lorant, Stanislaus Pouget, Kevin Stalsberg, Alain Wesquet
  • Publication number: 20050137777
    Abstract: A method for defining a sliding mode control system for a turbocharger system is provided. The method includes perturbing a turbocharger actuator and measuring turbocharger boost pressure output from the perturbation. The perturbation and measurements are repeated for a plurality of states of operation of the turbocharger. System parameters identified for each of the plurality of states from the plurality of perturbations and measurements. A sliding mode control law may be defined for each of the plurality of states from the system parameters. A sliding mode control system for controlling the boost pressure of a turbocharger is also provided. An actuator for controlling the boost pressure is electrically controlled by a sliding mode controller to stabilize the turbocharger system toward a setpoint on a sliding surface. The control law is determined from a plurality of linear models from a plurality of operating states of the turbocharger system.
    Type: Application
    Filed: December 18, 2003
    Publication date: June 23, 2005
    Inventors: Soumitri Kolavennu, Pierre Barthelet
  • Patent number: 6904353
    Abstract: A method for defining a sliding mode control system for a turbocharger system is provided. The method includes perturbing a turbocharger actuator and measuring turbocharger boost pressure output from the perturbation. The perturbation and measurements are repeated for a plurality of states of operation of the turbocharger. System parameters identified for each of the plurality of states from the plurality of perturbations and measurements. A sliding mode control law may be defined for each of the plurality of states from the system parameters. A sliding mode control system for controlling the boost pressure of a turbocharger is also provided. An actuator for controlling the boost pressure is electrically controlled by a sliding mode controller to stabilize the turbocharger system toward a setpoint on a sliding surface. The control law is determined from a plurality of linear models from a plurality of operating states of the turbocharger system.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: June 7, 2005
    Assignee: Honeywell International, Inc.
    Inventors: Soumitri N. Kolavennu, Pierre Barthelet