Patents by Inventor Pierre Alexandre

Pierre Alexandre 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 and system for setting an acceleration schedule for engine start
    Patent number: 11131211
    Abstract: Herein provided are methods and systems for setting an acceleration schedule for engine start of a gas turbine engine. A rotational acceleration measurement of the engine is obtained after the engine is energized in response to a start request. The rotational acceleration measurement of the engine is compared to a threshold value within an acceleration band having a maximum threshold and a minimum threshold. An acceleration schedule is determined based on a position of the rotational acceleration measurement of the engine in the acceleration band relative to the threshold value.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: September 28, 2021
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Sylvain Lamarre, Pierre Alexandre
  • Method and system for setting fuel flow for engine start as a function of aircraft speed
    Patent number: 10801416
    Abstract: Herein provided are methods and systems for setting a fuel flow schedule for starting a gas turbine engine of an aircraft. Aircraft speed and engine rotational speed are obtained. A compressor inlet recovered pressure is estimated by combining a first component influenced by the aircraft speed and a second component influenced by the engine rotational speed, and a fuel flow schedule is selected for engine start in accordance with the estimated compressor inlet recovered pressure.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: October 13, 2020
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Sylvain Lamarre, Jeremie Hebert, Pierre Alexandre
  • METHOD AND SYSTEM FOR SETTING AN ACCELERATION SCHEDULE FOR ENGINE START
    Publication number: 20190284953
    Abstract: Herein provided are methods and systems for setting an acceleration schedule for engine start of a gas turbine engine. A rotational acceleration measurement of the engine is obtained after the engine is energized in response to a start request. The rotational acceleration measurement of the engine is compared to a threshold value within an acceleration band having a maximum threshold and a minimum threshold. An acceleration schedule is determined based on a position of the rotational acceleration measurement of the engine in the acceleration band relative to the threshold value.
    Type: Application
    Filed: June 6, 2019
    Publication date: September 19, 2019
    Inventors: Sylvain LAMARRE, Pierre Alexandre
  • Method and system for setting an acceleration schedule for engine start
    Patent number: 10352189
    Abstract: Herein provided are methods and systems for setting an acceleration schedule for engine start of a gas turbine engine. A rotational acceleration measurement of the engine after the engine is energized in response to a start request is obtained. The rotational acceleration measurement of the engine is compared to an acceleration band having a maximum threshold and a minimum threshold. An acceleration schedule is determined based on a position of the rotational acceleration measurement of the engine in the acceleration band.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: July 16, 2019
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Sylvain Lamarre, Pierre Alexandre
  • METHOD AND SYSTEM FOR SETTING AN ACCELERATION SCHEDULE FOR ENGINE START
    Publication number: 20180328220
    Abstract: Herein provided are methods and systems for setting an acceleration schedule for engine start of a gas turbine engine. A rotational acceleration measurement of the engine after the engine is energized in response to a start request is obtained. The rotational acceleration measurement of the engine is compared to an acceleration band having a maximum threshold and a minimum threshold. An acceleration schedule is determined based on a position of the rotational acceleration measurement of the engine in the acceleration band.
    Type: Application
    Filed: May 10, 2017
    Publication date: November 15, 2018
    Inventors: Sylvain LAMARRE, Pierre Alexandre
  • METHOD AND SYSTEM FOR SETTING FUEL FLOW FOR ENGINE START AS A FUNCTION OF AIRCRAFT SPEED
    Publication number: 20180320600
    Abstract: Herein provided are methods and systems for setting a fuel flow schedule for starting a gas turbine engine of an aircraft. Aircraft speed and engine rotational speed are obtained. A compressor inlet recovered pressure is estimated by combining a first component influenced by the aircraft speed and a second component influenced by the engine rotational speed, and a fuel flow schedule is selected for engine start in accordance with the estimated compressor inlet recovered pressure.
    Type: Application
    Filed: May 3, 2017
    Publication date: November 8, 2018
    Inventors: Sylvain LAMARRE, Jeremie HEBERT, Pierre Alexandre