公开(公告)号：US10815877B2

公开(公告)日：2020-10-27

申请号：US15408784

申请日：2017-01-18

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Andre Julien ,  Edwin Schulz

IPC: F02B53/02 ,  F02B53/10 ,  F02B19/10 ,  F02D41/00 ,  F02B53/00

Abstract: A method of operating a rotary engine including a rotor engaged to a shaft and rotationally received in a housing to define a plurality of working chambers of variable volume, including delivering a pilot quantity of fuel into a pilot cavity in successive communication with the working chambers, igniting the pilot quantity of fuel within the pilot cavity, and delivering a main quantity of fuel into the working chambers downstream of the successive communication of the pilot cavity with the working chambers, where at least one of the pilot quantity and the main quantity is varied between successive rotations of the shaft.

公开(公告)号：US10570789B2

公开(公告)日：2020-02-25

申请号：US15185544

申请日：2016-06-17

Applicant: Pratt & Whitney Canada Corp.

Inventor： Edwin Schulz ,  Etienne Plamondon ,  Jean Thomassin

IPC: F01M11/02 ,  F01C21/04 ,  F01M1/02 ,  F01M5/00 ,  F02B53/00 ,  F02B55/02 ,  F02B55/08

Abstract: A rotary internal combustion engine with a housing having a fluid passage defined therethrough opening into a portion of its inner surface engaging each peripheral or apex seal of the rotor. An injector has an inlet for fluid communication with a pressurized lubricant source and a selectively openable and closable outlet in fluid communication with the fluid passage for delivering the pressurized lubricant to each seal through the fluid passage. A housing for a Wankel engine and a method of lubricating peripheral seals of a rotor in an internal combustion engine are also discussed.

公开(公告)号：US10557407B2

公开(公告)日：2020-02-11

申请号：US15825683

申请日：2017-11-29

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Serge Dussault ,  Andre Julien ,  Michael Lanktree ,  Edwin Schulz ,  Jean Thomassin ,  Nigel Davenport ,  Eugene Gekht

IPC: F02B55/08 ,  F02B53/12 ,  F02B53/02 ,  F02B19/12 ,  F02B53/10 ,  F01C21/18 ,  F01C21/10 ,  F01C21/06 ,  F01C1/22 ,  F02B19/10 ,  F04C29/00 ,  F01C21/08 ,  F01C20/24 ,  F01C20/10 ,  F01C20/06 ,  F01C11/00

Abstract: A rotary engine including a rotor sealingly received within an internal cavity of an outer body to define a plurality of combustion chambers having a variable volume, a pilot subchamber located in a wall of the outer body, the pilot subchamber in fluid communication with the internal cavity via at least two spaced apart transfer holes defining a flow restriction between the pilot subchamber and the internal cavity, a pilot fuel injector in fluid communication with the pilot subchamber, an ignition element configured for igniting fuel in the pilot subchamber, and a main fuel injector extending through the stator body and communicating with the cavity at a location spaced apart from the pilot subchamber. A method of combusting fuel in a rotary engine is also discussed.

公开(公告)号：US10544732B2

公开(公告)日：2020-01-28

申请号：US15153277

申请日：2016-05-12

Applicant: Pratt & Whitney Canada Corp.

Inventor： Bruno Villeneuve ,  Edwin Schulz

IPC: F02B53/10 ,  F02B55/16 ,  F02B53/04

Abstract: A rotary engine having an outer body having an internal cavity with a peripheral wall having an insert opening defined therethrough in communication with the internal cavity, and a plurality of coolant passages defined through the peripheral wall in proximity of the insert opening, a rotor body rotatable within the internal cavity, and an insert removably received in the insert opening of the peripheral wall, the insert having a subchamber defined therein communicating with the internal cavity, with a minimum width of the insert opening being at least 0.75 inches. An outer body for a rotary engine and a method of inspecting in an internal cavity in an outer body of a rotary engine are also discussed; also, a rotary engine including a fuel injector having a tip received in the injector hole of the peripheral wall without protruding in the insert opening.

公开(公告)号：US10138804B2

公开(公告)日：2018-11-27

申请号：US15794492

申请日：2017-10-26

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

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, providing independently closable communications between an air source and the primary and secondary inlet ports, and controlling air intake flows between the air source and the primary and secondary inlet ports. Controlling air intake flows includes simultaneously allowing the air intake flow between the primary inlet port and the air source and between the secondary inlet port and the air source. Exhaust gases of the engine are purged with the air intake flow of the secondary inlet port. A rotary engine is also discussed.

公开(公告)号：US10072559B2

公开(公告)日：2018-09-11

申请号：US15273788

申请日：2016-09-23

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Edwin Schulz ,  Michael Lanktree

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

CPC classification number: F02B19/1071 ,  F01C1/22 ,  F02B19/1014 ,  F02B19/108 ,  F02B19/12 ,  F02B53/00 ,  F02B53/02 ,  F02B53/10 ,  F02B53/12 ,  F02B2053/005 ,  F02B2275/32 ,  F02D41/045 ,  F02D41/3094 ,  F02D41/403 ,  Y02T10/125 ,  Y02T10/17 ,  Y02T10/44

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.