Patents by Inventor James Robert JARVO

James Robert JARVO 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: 20200362763
    Abstract: Methods and systems of operating a gas turbine engine in a low-power condition are provided. In one embodiment, the method includes supplying fuel to a combustor by supplying fuel to a first fuel manifold and a second fuel manifold of the gas turbine engine. The method also includes, while supplying fuel to the combustor by supplying fuel to the first fuel manifold: stopping supplying fuel to the second fuel manifold; and supplying pressurized air to the second fuel manifold to flush fuel in the second fuel manifold into the combustor and hinder coking in the second fuel manifold and associated fuel nozzles.
    Type: Application
    Filed: May 11, 2020
    Publication date: November 19, 2020
    Inventors: James Robert JARVO, C├ędric SAINTIGNAN, Joseph Daniel Maxim CIRTWILL, Kian MCCALDON, Marc-Andre TREMBLAY, David WADDLETON
  • Patent number: 10830391
    Abstract: There is described herein methods and system for correcting steady state errors in propeller speed by calculating a leakage flow rate as a function of engine and propeller parameters.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: November 10, 2020
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Reza Pedrami, James Robert Jarvo, Benjamin Renaud
  • Patent number: 10705038
    Abstract: There is described herein methods and systems for detecting of metallic chips in a fluid system of an aircraft engine. A resistance value is measured across a magnetic chip detector mounted to a fluid system of the aircraft engine. The resistance value is transmitted to an engine computer of the aircraft engine. In the engine computer, The resistance value is compared to a first threshold and a first warning indicative of a chip in the fluid is issued when the resistance value exceeds the first threshold.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: July 7, 2020
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Thomas Trevor Ricci, Simon Sai-Ming Lam, James Robert Jarvo
  • Publication number: 20200172263
    Abstract: A propeller control system for an aircraft propeller rotatable about a longitudinal axis and having an adjustable blade angle is provided. A blade angle feedback ring is coupled to the propeller to rotate with the propeller and to move along the longitudinal axis along with adjustment of the blade angle. The feedback ring includes position markers spaced around its circumference. A sensor is positioned adjacent the feedback ring for producing signals indicative of passage of the position markers. A controller is in communication with the sensor, and is configured for: measuring a distance between the position markers, wherein the distance is representative of a longitudinal position of the feedback ring; determining whether a value representative of the longitudinal position is within a first threshold range; and when the value is within the first threshold range, storing the value as a calibration value associated with the blade angle feedback ring.
    Type: Application
    Filed: October 25, 2019
    Publication date: June 4, 2020
    Inventors: Ella YAKOBOV, James Robert Jarvo
  • Patent number: 10486827
    Abstract: An aircraft propeller control system for an aircraft propeller with adjustable blade angle has a blade angle feedback ring and a sensor, one of which is mounted for rotation with the propeller. The blade angle feedback ring moves longitudinally along with adjustment of the blade angle and has position markers circumferentially spaced apart at distances that vary along a longitudinal axis. The sensor is positioned adjacent the feedback ring for producing signals indicative of passage of the position markers. Intervals between signals are indicative of circumferential distances between position markers. A controller measures longitudinal position of the feedback ring based on the intervals and is configured to produce a warning signal if the longitudinal position is outside a first threshold range.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: November 26, 2019
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Ella Yakobov, James Robert Jarvo
  • Patent number: 10435140
    Abstract: A system and method for blade angle position feedback. The system comprises an feedback device and a sensor mounted adjacent the feedback device and configured for detecting a passage of position markers on the feedback device during propeller rotation. The position markers are spaced apart from one another around the circumference of the feedback device and are oriented at an angle to one another and to a longitudinal axis. The feedback device and sensor are configured for relative axial displacement. A detection unit is connected to the sensor for receiving the sensor signal therefrom, determining on the basis of the sensor signal a time interval elapsed between the passage of successive position markers, and computing from the time interval blade angle position.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: October 8, 2019
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Joseph Ernesto Marone, James Robert Jarvo, Ella Yakobov, Mark Iacobacci
  • Publication number: 20190257777
    Abstract: There is described herein methods and systems for detecting of metallic chips in a fluid system of an aircraft engine. A resistance value is measured across a magnetic chip detector mounted to a fluid system of the aircraft engine. The resistance value is transmitted to an engine computer of the aircraft engine. In the engine computer, The resistance value is compared to a first threshold and a first warning indicative of a chip in the fluid is issued when the resistance value exceeds the first threshold.
    Type: Application
    Filed: April 30, 2019
    Publication date: August 22, 2019
    Inventors: Thomas Trevor Ricci, Simon Sai-Ming Lam, James Robert Jarvo
  • Patent number: 10317354
    Abstract: There is described herein methods and systems for detecting of metallic chips in a fluid system of an aircraft engine. A resistance value is measured across a magnetic chip detector mounted to a fluid system of the aircraft engine. The resistance value is transmitted to an engine computer of the aircraft engine. In the engine computer, The resistance value is compared to a first threshold and a first warning indicative of a chip in the fluid is issued when the resistance value exceeds the first threshold.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: June 11, 2019
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Thomas Trevor Ricci, Simon Sai-Ming Lam, James Robert Jarvo
  • Patent number: 10280788
    Abstract: A system and method for controlling the operation of a gas turbine engine supplying power to an aircraft. The engine is controlled according to a reading of an amount of power drawn from the supplied power. The reading is fed directly to a control system, which issues commands for controlling engine parameters comprising an acceleration reference signal, load shedding, variable geometry positioning, and fuel flow. The control system may further issue commands for controlling the amount of power drawn. The control system may further use the reading to monitor the engine's condition.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: May 7, 2019
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Bryan Chen, Dariusz Chmiel, Philippe Beauchesne-Martel, James Robert Jarvo
  • Publication number: 20190003642
    Abstract: There is described herein methods and system for correcting steady state errors in propeller speed by calculating a leakage flow rate as a function of engine and propeller parameters.
    Type: Application
    Filed: August 10, 2018
    Publication date: January 3, 2019
    Inventors: Reza PEDRAMI, James Robert JARVO, Benjamin RENAUD
  • Patent number: 10072796
    Abstract: There is described herein methods and system for correcting steady state errors in propeller speed by calculating a leakage flow rate as a function of engine and propeller parameters.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: September 11, 2018
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Reza Pedrami, James Robert Jarvo, Benjamin Renaud
  • Publication number: 20180050789
    Abstract: A system and method for blade angle position feedback. The system comprises an feedback device and a sensor mounted adjacent the feedback device and configured for detecting a passage of position markers on the feedback device during propeller rotation. The position markers are spaced apart from one another around the circumference of the feedback device and are oriented at an angle to one another and to a longitudinal axis. The feedback device and sensor are configured for relative axial displacement. A detection unit is connected to the sensor for receiving the sensor signal therefrom, determining on the basis of the sensor signal a time interval elapsed between the passage of successive position markers, and computing from the time interval blade angle position.
    Type: Application
    Filed: August 17, 2016
    Publication date: February 22, 2018
    Inventors: Joseph Ernesto MARONE, James Robert JARVO, Ella YAKOBOV, Mark IACOBACCI
  • Publication number: 20180050816
    Abstract: An aircraft propeller control system for an aircraft propeller with adjustable blade angle has a blade angle feedback ring and a sensor, one of which is mounted for rotation with the propeller. The blade angle feedback ring moves longitudinally along with adjustment of the blade angle and has position markers circumferentially spaced apart at distances that vary along a longitudinal axis. The sensor is positioned adjacent the feedback ring for producing signals indicative of passage of the position markers. Intervals between signals are indicative of circumferential distances between position markers. A controller measures longitudinal position of the feedback ring based on the intervals and is configured to produce a warning signal if the longitudinal position is outside a first threshold range.
    Type: Application
    Filed: August 17, 2016
    Publication date: February 22, 2018
    Inventors: Ella YAKOBOV, James Robert JARVO
  • Publication number: 20180031504
    Abstract: There is described herein methods and systems for detecting of metallic chips in a fluid system of an aircraft engine. The method comprises measuring a resistance value across a magnetic chip detector mounted to a fluid system of the aircraft engine and transmitting the resistance value to an engine computer of the aircraft engine. The method further comprises, in the engine computer, comparing the resistance value to a first threshold and issuing a first warning indicative of a chip in the fluid when the resistance value exceeds the first threshold.
    Type: Application
    Filed: November 21, 2016
    Publication date: February 1, 2018
    Inventors: Thomas Trevor RICCI, Simon Sai-Ming LAM, James Robert JARVO
  • Publication number: 20180017209
    Abstract: There is described herein methods and system for correcting steady state errors in propeller speed by calculating a leakage flow rate as a function of engine and propeller parameters.
    Type: Application
    Filed: July 13, 2016
    Publication date: January 18, 2018
    Inventors: Reza PEDRAMI, James Robert JARVO, Benjamin RENAUD
  • Patent number: 9821901
    Abstract: A system and method for blade angle position feedback. The system comprises an annular member operatively connected to rotate with a propeller, a sensor fixedly mounted adjacent the annular member and configured for detecting a passage of each singularity as the annular member is rotated and axially displaced and for generating a sensor signal accordingly, the annular member and sensor configured for relative axial displacement between a first relative axial position and a second relative axial position respectively corresponding to the first and the second mode of operation, and a detection unit connected to the sensor for receiving the sensor signal therefrom, determining on the basis of the sensor signal a time interval elapsed between the passage of successive singularities, and computing from the time interval blade angle position.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: November 21, 2017
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Brant Duke, James Robert Jarvo, Michael Mark, Mario Guerra
  • Publication number: 20160281529
    Abstract: A system and method for controlling the operation of a gas turbine engine supplying power to an aircraft. The engine is controlled according to a reading of an amount of power drawn from the supplied power. The reading is fed directly to a control system, which issues commands for controlling engine parameters comprising an acceleration reference signal, load shedding, variable geometry positioning, and fuel flow. The control system may further issue commands for controlling the amount of power drawn. The control system may further use the reading to monitor the engine's condition.
    Type: Application
    Filed: June 7, 2016
    Publication date: September 29, 2016
    Inventors: Bryan CHEN, Dariusz CHMIEL, Philippe BEAUCHESNE-MARTEL, James Robert JARVO
  • Patent number: 9382010
    Abstract: A system and method for controlling the operation of a gas turbine engine supplying power to an aircraft. The engine is controlled according to a reading of an amount of power drawn from the supplied power. The reading is fed directly to a control system, which issues commands for controlling engine parameters comprising an acceleration reference signal, load shedding, variable geometry positioning, and fuel flow. The control system may further issue commands for controlling the amount of power drawn. The control system may further use the reading to monitor the engine's condition.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: July 5, 2016
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Bryan Chen, Dariusz Chmiel, Philippe Beauchesne-Martel, James Robert Jarvo
  • Publication number: 20150139798
    Abstract: A system and method for blade angle position feedback. The system comprises an annular member operatively connected to rotate with a propeller, a sensor fixedly mounted adjacent the annular member and configured for detecting a passage of each singularity as the annular member is rotated and axially displaced and for generating a sensor signal accordingly, the annular member and sensor configured for relative axial displacement between a first relative axial position and a second relative axial position respectively corresponding to the first and the second mode of operation, and a detection unit connected to the sensor for receiving the sensor signal therefrom, determining on the basis of the sensor signal a time interval elapsed between the passage of successive singularities, and computing from the time interval blade angle position.
    Type: Application
    Filed: November 18, 2014
    Publication date: May 21, 2015
    Inventors: Brant DUKE, James Robert JARVO, Michael MARK, Mario GUERRA