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公开(公告)号：US20210355898A1
公开(公告)日：2021-11-18
申请号：US16872937
申请日：2020-05-12
Applicant: PRATT & WHITNEY CANADA CORP.
Inventor： Etienne PLAMONDON , Sebastien BERGERON , Jean THOMASSIN
Abstract: A rotary internal combustion engine (ICE) has: a housing defining a rotor cavity; a rotor received within the rotor cavity to define working chambers of variable volume around the rotor, the rotor having circumferentially spaced peripheral apex seals biased radially outwardly in sliding engagement against a peripheral wall of the housing to separate the working chambers from one another, the housing having a fluid passage defined therethrough and opening into an inner surface of the peripheral wall; and an injector having a lubricant inlet hydraulically connected to a lubricant source, an actuation inlet hydraulically connected to a source of an actuation fluid, and a lubricant outlet, the injector having an open state in which the lubricant outlet is in fluid flow communication with the fluid passage upon the actuation fluid received within the injector and a closed state in which the lubricant outlet is disconnected from the fluid passage.
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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
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.
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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
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.
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公开(公告)号：US20200248648A1
公开(公告)日：2020-08-06
申请号：US16263113
申请日：2019-01-31
Applicant: PRATT & WHITNEY CANADA CORP.
Inventor： Sebastien BERGERON , Etienne PLAMONDON , Andre JULIEN
Abstract: There is disclosed an engine assembly for an aircraft, including: a combustion engine including a coolant circuit in heat exchange relationship with a heat sink, the heat sink including a heat exchanger and at least one component, the at least one component having a main function that differs from thermal exchange. A method of operating the system is also disclosed.
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公开(公告)号：US20220316361A1
公开(公告)日：2022-10-06
申请号：US17219171
申请日：2021-03-31
Applicant: PRATT & WHITNEY CANADA CORP.
Inventor： Sebastien BERGERON , Marion DANIEL
Abstract: Aircraft engine oil tanks, lubrication systems, and associated methods are provided. The oil tank includes a first tank portion defining a first volume for holding oil and a second tank portion defining a second volume for holding oil, in fluid communication with the first volume. The first tank portion includes an oil outlet for delivering oil to a lubrication load via a pump. The first volume is in fluid communication with a vent opening for venting the oil tank. At least part of the second tank portion is disposed higher than the vent opening for retaining a quantity of oil inside the oil tank during a negative-g force flight condition and facilitate the recovery of the lubrication system following the negative-g force flight condition.
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Patent Agency Ranking
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
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.
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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
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.
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公开(公告)号：US20200309025A1
公开(公告)日：2020-10-01
申请号：US16366116
申请日：2019-03-27
Applicant: PRATT & WHITNEY CANADA CORP.
Inventor： Sebastien BERGERON , Andre JULIEN
Abstract: There is disclosed a method of operating an engine assembly, including: driving a load with an internal combustion engine and an output of a turbine section, the turbine section driven by combustion gases from an exhaust the internal combustion engine; and injecting fuel upstream of the turbine section and downstream of the exhaust of the internal combustion engine. An engine assembly having a secondary injector for injecting fuel upstream of the turbine section and downstream of the combustion engine is also disclosed.
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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
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.
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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
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.
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