公开(公告)号：US10526961B2

公开(公告)日：2020-01-07

申请号：US15428303

申请日：2017-02-09

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Serge Dussault ,  Andre Julien ,  Michael Lanktree ,  Edwin Schulz

IPC: F02B55/14 ,  F02B53/00 ,  F01C11/00 ,  F01C20/18 ,  F02B55/02 ,  F02B55/08 ,  F02B53/08 ,  F01C1/22 ,  F01C21/08 ,  F01C21/00

Abstract: A rotary internal combustion engine including a rotor assembly where at least a first and a second of the combustion chambers have unequal theoretical volumetric ratios. Also, a rotary internal combustion engine including first and second rotor assemblies where at least one of the combustion chambers of the first rotor assembly and at least one of the combustion chambers of the second rotor assembly have unequal effective volumetric compression ratios and/or unequal effective volumetric expansion ratios.

公开(公告)号：US10533486B2

公开(公告)日：2020-01-14

申请号：US16100611

申请日：2018-08-10

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Edwin Schulz ,  Michael Lanktree

IPC: F02B19/10 ,  F02D41/04 ,  F02D41/30 ,  F02D41/40 ,  F02B53/02 ,  F02B53/10

Abstract: A method of operating an internal combustion engine having pilot subchambers communicating with main combustion chambers, the internal combustion engine configured in use to deliver a main fuel injection of a maximum quantity of fuel to the main combustion chambers when the internal combustion engine is operated at maximum load. The method includes delivering a pilot fuel injection of at most 10% of the maximum quantity to the pilot subchambers, igniting the pilot fuel injection within the pilot subchambers, directing the ignited fuel from the pilot subchambers to the main combustion chambers, and delivering a main fuel injection of a main quantity of fuel to at least one of the main combustion chambers receiving the ignited fuel, with the main quantity being at most 10% of the maximum quantity.

公开(公告)号：US10514017B2

公开(公告)日：2019-12-24

申请号：US15464783

申请日：2017-03-21

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Michael Lanktree ,  Edwin Schulz

IPC: F02P15/00 ,  F01C1/00 ,  F02B19/12 ,  F23Q7/00 ,  F02P13/00 ,  F02B19/00 ,  F02B53/10 ,  F02B9/08 ,  F02B19/10 ,  F02B53/12 ,  F02B53/00 ,  F02P19/02 ,  F01C1/22

Abstract: An internal combustion engine including an igniter disposed at least partially within an aperture defined in a housing of the engine, the igniter having a body including a tip supporting portion and having a tip extending from the tip supporting portion. A cooling sleeve is disposed around the tip supporting portion, and the cooling sleeve defines a path of heat transfer between the tip supporting portion and the housing. The engine may be a rotary engine. A method for cooling an igniter of an internal combustion engine is also discussed.

公开(公告)号：US10920656B2

公开(公告)日：2021-02-16

申请号：US15618945

申请日：2017-06-09

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Andre Julien ,  Michael Lanktree ,  Serge Dussault

IPC: F02B29/04 ,  F01P7/16 ,  F02B41/10 ,  F02B53/00 ,  F01P3/18

Abstract: A cooling system for an internal combustion engine comprises a fluid circuit having an intercooler, a main cooler and a precooler. The intercooler is configured for receiving coolant and configured for heat exchange relation between the coolant and engine compressed air. The main cooler is configured for receiving the coolant from the intercooler and the internal combustion engine and configured for selectively delivering a first portion of the coolant from the main cooler to the precooler. The precooler is configured to deliver a flow of the coolant to the intercooler. The main cooler and the precooler are configured for cooling the coolant by heat exchange with at least one cooling flow.

公开(公告)号：US10041402B2

公开(公告)日：2018-08-07

申请号：US15489994

申请日：2017-04-18

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Edwin Schulz ,  Michael Lanktree ,  Jean Thomassin

IPC: F02B53/10 ,  F02B19/10 ,  F02B19/12 ,  F02B53/12 ,  F01C1/22 ,  F01C1/344 ,  F01C21/06 ,  F01C21/10 ,  F01C21/18 ,  F02B53/04 ,  F02B55/16 ,  F02B53/00 ,  F01C20/28

CPC classification number: F02B53/10 ,  F01C1/22 ,  F01C1/344 ,  F01C20/28 ,  F01C21/06 ,  F01C21/106 ,  F01C21/18 ,  F02B19/1019 ,  F02B19/12 ,  F02B53/04 ,  F02B53/12 ,  F02B55/16 ,  F02B2053/005 ,  Y02T10/125 ,  Y02T10/17

Abstract: An internal combustion engine includes a housing defining an internal cavity, an inner body sealingly moving within the internal cavity for defining at least one combustion chamber of variable volume, a pilot subchamber in communication with the at least one working chamber, an ignition element in communication with the pilot subchamber, a main injector communicating with the at least one combustion chamber, and a pilot injector having a tip in communication with the pilot subchamber. The tip of the pilot injector includes at least a first injection hole defining a first spray direction and a second injection hole defining a second spray direction different from the first spray direction. The first spray direction extends toward the communication between the pilot subchamber and the at least one working chamber. A method of performing combustion in an internal combustion engine is also discussed.

公开(公告)号：US09828906B2

公开(公告)日：2017-11-28

申请号：US15363099

申请日：2016-11-29

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Jean Thomassin ,  Andre Julien ,  Edwin Schulz ,  Michael Lanktree

IPC: F02B53/00 ,  F02B53/06 ,  F01C1/22 ,  F01C20/06 ,  F01C20/10 ,  F01C20/24 ,  F01C21/08 ,  F01C21/10 ,  F01C21/18 ,  F02B53/04 ,  F02B53/02 ,  F02B55/16 ,  F01C11/00 ,  F01C21/06 ,  F04C29/00

CPC classification number: F02B53/06 ,  F01C1/22 ,  F01C11/006 ,  F01C20/06 ,  F01C20/10 ,  F01C20/24 ,  F01C21/06 ,  F01C21/08 ,  F01C21/106 ,  F01C21/18 ,  F01C21/183 ,  F02B53/02 ,  F02B53/04 ,  F02B55/16 ,  F02B2053/005 ,  F04C29/0092 ,  F04C2240/80

Abstract: A method of controlling an air intake flow in a rotary engine having primary and secondary inlet ports, including positioning the secondary inlet port rearwardly of the primary inlet port and forwardly of the exhaust port along a direction of a revolution of the rotor, and controlling air intake flows communicating between an air source and the primary and secondary inlet ports. During engine start-up, a primary valve is closed to prevent the intake air flow between the primary inlet port and the air source and a secondary valve is opened to allow the intake air flow between the secondary inlet port and the air source. A rotary engine defining different compression ratios through actuation of a valve is also discussed.

公开(公告)号：US11261781B2

公开(公告)日：2022-03-01

申请号：US16717422

申请日：2019-12-17

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Serge Dussault ,  Andre Julien ,  Michael Lanktree ,  Edwin Schulz

IPC: F04C29/12 ,  F04C18/22 ,  F02B55/14 ,  F01C1/22 ,  F01C11/00 ,  F02B55/02 ,  F04B39/02 ,  F04B39/12 ,  F02B55/08 ,  F02B53/08 ,  F01C20/18 ,  F01C21/08 ,  F01C21/18 ,  F01C21/10 ,  F02B53/00 ,  F01C21/00

Abstract: A rotary internal combustion engine including a rotor assembly where at least a first and a second of the combustion chambers have unequal theoretical volumetric ratios. Also, a rotary internal combustion engine including first and second rotor assemblies where at least one of the combustion chambers of the first rotor assembly and at least one of the combustion chambers of the second rotor assembly have unequal effective volumetric compression ratios and/or unequal effective volumetric expansion ratios.

公开(公告)号：US10801394B2

公开(公告)日：2020-10-13

申请号：US15825691

申请日：2017-11-29

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Serge Dussault ,  Andre Julien ,  Michael Lanktree ,  Edwin Schulz

IPC: F01C1/00 ,  F01C1/22 ,  F01C21/18 ,  F02B19/10 ,  F02B53/02 ,  F02B53/10 ,  F02B53/12 ,  F02B53/00

Abstract: A rotary engine including at least two pilot subchambers each in parallel fluid communication with the internal cavity, so that each pilot subchamber is in fluid communication with the combustion chambers as the rotor rotates. Each of the at least two pilot subchambers in fluid communication with a corresponding pilot fuel injector. At least one ignition source is configured for igniting fuel in the pilot subchambers. A compound engine assembly and a method of combusting fuel in a rotary engine are also discussed.

公开(公告)号：US10539065B2

公开(公告)日：2020-01-21

申请号：US15624257

申请日：2017-06-15

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Andre Julien ,  Edwin Schulz ,  Michael Lanktree ,  Serge Dussault

IPC: F02B29/04 ,  F02B61/04 ,  F02B53/08 ,  F02B37/00 ,  F02B53/00

Abstract: A method of operating an engine assembly receiving fuel, including admitting atmospheric air at a temperature T1 through an inlet of a compressor having a pressure ratio of PRGT, compressing the air in the compressor, cooling the compressed air from the compressor through an intercooler to cool the air from a temperature TBIC to a temperature TAIC, delivering the cooled compressed air from the intercooler to an inlet of an intermittent internal combustion engine having an effective volumetric compression ratio rVC, and further compressing the air in the intermittent internal combustion engine before igniting the fuel, where ( PR GT ) a ⁢ ( r VC ) b ⁢ ( T AIC T BIC ) ⁢ ( T 1 T A )

公开(公告)号：US09540992B2

公开(公告)日：2017-01-10

申请号：US14152255

申请日：2014-01-10

Applicant: Pratt & Whitney Canada Corp.

Inventor： Jean Thomassin ,  Andre Julien ,  Edwin Schulz ,  Michael Lanktree

IPC: F02B53/00 ,  F02B53/06 ,  F02B53/04 ,  F01C1/22 ,  F01C20/06 ,  F01C20/10 ,  F01C20/24 ,  F01C21/18 ,  F01C11/00 ,  F01C21/06 ,  F01C21/08 ,  F01C21/10 ,  F04C29/00

CPC classification number: F02B53/06 ,  F01C1/22 ,  F01C11/006 ,  F01C20/06 ,  F01C20/10 ,  F01C20/24 ,  F01C21/06 ,  F01C21/08 ,  F01C21/106 ,  F01C21/18 ,  F01C21/183 ,  F02B53/02 ,  F02B53/04 ,  F02B55/16 ,  F02B2053/005 ,  F04C29/0092 ,  F04C2240/80

Abstract: A method and apparatus for controlling an air input in a rotary engine, including selectively controlling a plurality of inlet ports communicating with an internal combustion cavity of the engine, the ports located serially downstream of the exhaust port relative direction of a revolution of a rotor of the engine. The inlet ports are controlled to alter air intake at various engine operational stages, such as start up, idle, etc., to allow for varying operational requirements to be met. For example: when a power demand on the engine lower than a predetermined threshold, control may be effected by opening a primary inlet port and closing a secondary inlet port; and, when the power demand exceeds the predetermined threshold, control may be effected by opening the primary inlet port and opening the secondary inlet port, the secondary inlet port being located such as to be in communication with the exhaust port throughout portions of the revolution of the engine to purge exhaust gases of the engine.

Abstract translation: 一种用于控制旋转发动机中的空气输入的方法和装置，包括选择性地控制与发动机的内部燃烧腔相通的多个入口，排气口的下游侧的端口相对于转子转速的相对方向 引擎。 入口端口被控制以改变各种发动机操作阶段（例如起动，空转等）的进气口，以允许满足不同的操作要求。 例如：当发动机上的功率需求低于预定阈值时，可以通过打开主入口并关闭次级入口来实现控制; 并且当功率需求超过预定阈值时，可以通过打开主入口并打开次级入口来进行控制，次级入口位于与排气口连通的部分， 发动机来净化发动机的废气。