公开(公告)号：US20190003642A1

公开(公告)日：2019-01-03

申请号：US16100768

申请日：2018-08-10

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Reza PEDRAMI ,  James Robert JARVO ,  Benjamin RENAUD

IPC: F16N29/02 ,  G01F15/00 ,  B63H3/08 ,  B64C11/40 ,  B64C11/30 ,  B64C11/00

CPC classification number: F16N29/02 ,  B63H3/08 ,  B64C11/00 ,  B64C11/303 ,  B64C11/40 ,  F16N2210/08 ,  F16N2230/00 ,  F16N2250/04 ,  F16N2250/08 ,  F16N2270/20 ,  G01F15/003

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.

公开(公告)号：US20200232431A1

公开(公告)日：2020-07-23

申请号：US16251512

申请日：2019-01-18

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Etienne PLAMONDON ,  Sebastien BERGERON ,  Benjamin RENAUD ,  Jean-Gabriel GAUVREAU

IPC: F02M53/04 ,  F01P3/16 ,  F02B53/10

Abstract: There is disclosed a method of operating an engine assembly including an internal combustion engine, a common-rail injector for injecting fuel in a combustion chamber of the internal combustion engine, and an oil circuit for lubricating components of the engine assembly. The method includes: injecting fuel in the combustion chamber via the common-rail injector; and exchanging heat between a backflow of fuel from the common-rail injector with oil of an oil circuit of the engine assembly.

公开(公告)号：US20200318644A1

公开(公告)日：2020-10-08

申请号：US16376320

申请日：2019-04-05

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： David WADDLETON ,  Benjamin RENAUD ,  Sebastien BERGERON ,  Etienne PLAMONDON ,  Jean-Gabriel GAUVREAU

IPC: F04D27/00 ,  F02C7/22

Abstract: A method of controlling a delivery pressure of an aircraft engine fuel system includes operating a rotodynamic fuel pump hydraulically connected to the fuel system to pump a fluid from an inlet of the rotodynamic pump and out of an outlet of the rotodynamic pump for delivery to the fuel system. The method further includes varying an angular relationship between the inlet and the outlet of the pump to control the delivery pressure. An aircraft engine fuel system and a rotodynamic pump are also described.

公开(公告)号：US20200284205A1

公开(公告)日：2020-09-10

申请号：US16296988

申请日：2019-03-08

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： David WADDLETON ,  Benjamin RENAUD ,  Sebastien BERGERON ,  Etienne PLAMONDON ,  Jean-Gabriel GAUVREAU

IPC: F02C9/30 ,  F02C9/36 ,  F04D27/00 ,  F04D29/40 ,  F04D29/58

Abstract: A liquid fuel system for an aircraft engine includes a first fuel supply conduit hydraulically connected to a fuel source, a second fuel supply conduit hydraulically connected to the engine, a fuel return conduit hydraulically connected to the second fuel supply conduit, and a fuel pump. The fuel pump has a main inlet hydraulically connected to the first fuel supply conduit, an outlet hydraulically connected to the second fuel supply conduit, and an intermediate inlet hydraulically connected to the fuel return conduit. The intermediate inlet is located between the main inlet and the outlet and in use has a pressure between the main inlet pressure and the outlet pressure. A method of supplying a liquid fuel to an aircraft engine is also described.

公开(公告)号：US20180017209A1

公开(公告)日：2018-01-18

申请号：US15209215

申请日：2016-07-13

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Reza PEDRAMI ,  James Robert JARVO ,  Benjamin RENAUD

IPC: F16N29/02 ,  B64C11/00

CPC classification number: F16N29/02 ,  B63H3/08 ,  B64C11/00 ,  B64C11/303 ,  B64C11/40 ,  F16N2210/08 ,  F16N2230/00 ,  F16N2250/04 ,  F16N2250/08 ,  F16N2270/20 ,  G01F15/003

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.

公开(公告)号：US20210062772A1

公开(公告)日：2021-03-04

申请号：US16558847

申请日：2019-09-03

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Sebastien BERGERON ,  Etienne PLAMONDON ,  Jean-Gabriel GAUVREAU ,  Benjamin RENAUD

IPC: F02M63/02 ,  F02M55/02 ,  F02B53/10 ,  F02B61/04

Abstract: A method of operating an aircraft engine of an aircraft, the aircraft engine having a common-rail fuel injection system for injecting fuel into a combustion chamber of the aircraft engine, including: pressurizing fuel for circulation through the common-rail injection system; circulating a portion of the pressurized fuel through a motive flow inlet of an ejector pump; and entraining a flow through the ejector pump with the portion of the pressurized fuel circulating through the motive flow inlet.

公开(公告)号：US20200300179A1

公开(公告)日：2020-09-24

申请号：US16361819

申请日：2019-03-22

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： David WADDLETON ,  Benjamin RENAUD ,  Sebastien BERGERON ,  Etienne PLAMONDON ,  Jean-Gabriel GAUVREAU

IPC: F02C9/28 ,  F02C9/30 ,  F02C7/22 ,  F04D15/00

Abstract: A rotodynamic pump for pumping a fluid includes an impeller, a housing surrounding the impeller, and a pressure regulating mechanism. The pressure regulating mechanism is configured to adjust the clearance between the impeller and the impeller housing to regulate pressure of the fluid downstream of the impeller. A method of regulating the delivery pressure is also disclosed.

公开(公告)号：US20200232432A1

公开(公告)日：2020-07-23

申请号：US16294160

申请日：2019-03-06

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Sebastien BERGERON ,  Etienne PLAMONDON ,  Jean-Gabriel GAUVREAU ,  Benjamin RENAUD

IPC: F02M55/02 ,  F02M63/02 ,  F02M37/36 ,  F02B53/10 ,  F02M37/30

Abstract: There is disclosed a method of de-icing a component of an engine assembly having a common-rail fuel injection system, including: pressurizing fuel to circulate the fuel through the common-rail injection system; drawing a portion of the fuel upstream of common-rail injectors of the common-rail injection system and directing a remainder of the fuel toward the common-rail injectors; and transferring heat from the drawn portion of the fuel to the component.

公开(公告)号：US20200232409A1

公开(公告)日：2020-07-23

申请号：US16352030

申请日：2019-03-13

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Etienne PLAMONDON ,  Sebastien BERGERON ,  Benjamin RENAUD ,  Jean-Gabriel GAUVREAU

IPC: F02D41/38 ,  F02D41/30 ,  F02D7/00 ,  F02M99/00

Abstract: There is disclosed a method of operating an engine assembly including a combustion engine and a common-rail injector. The method includes: injecting fuel into a combustion chamber of the combustion engine via the common-rail injector thereby generating a backflow of fuel; and powering an actuator using at least a portion of the backflow of fuel. An engine assembly including the combustion engine is disclosed; the engine assembly having a fuel circuit fluidly connecting a fuel source, the common-rail injector, and the second injector outlet together. The fuel circuit has an actuator sub-circuit operatively connected to an outlet of the common-rail injector and an actuator fluidly connected to the actuator sub-circuit.