公开(公告)号：US20240229703A9

公开(公告)日：2024-07-11

申请号：US17971239

申请日：2022-10-21

申请人： Pratt & Whitney Canada Corp.

发明人： Richard Freer

IPC分类号： F01P7/16 ,  F01P11/08

CPC分类号： F01P7/16 ,  F01P11/08 ,  F01P2007/146

摘要： An aircraft propulsion system and method of cooling the same are provided. The system includes a hydraulic pump, an intermittent IC engine, a hydraulic motor, an engine oil pump, and a cooling system. The intermittent IC engine drives the hydraulic pump. The hydraulic motor is powered by the hydraulic pump and drives a propulsor fan. The cooling system includes a first heat exchanger (AIR-EO HEX) and a second heat exchanger (EO-HF HEX). The AIR-EO HEX transfers heat between flows of engine oil and ambient air. The EO-HF HEX transfers heat between flows of engine oil and hydraulic fluid. The hydraulic pump provides motive force to cause the hydraulic oil to pass through the EO-HF HEX and back to the at least one hydraulic pump. The engine oil pump provides motive force to pass the engine oil to and through the AIR-EO HEX, the EO-HF HEX, and the intermittent IC engine.

公开(公告)号：US11454173B2

公开(公告)日：2022-09-27

申请号：US16369660

申请日：2019-03-29

申请人： PRATT & WHITNEY CANADA CORP.

发明人： Richard Freer ,  Kian McCaldon ,  Tin-Cheung John Hu ,  Michel Bousquet ,  André Fortin

IPC分类号： F02C7/264

摘要： There is disclosed an igniter for a gas turbine engine including: a base, a glow plug heater rod extending from the base along an axis and terminating in a rod end, and a plurality of fins disposed circumferentially around the glow plug heater rod, the fins extending axially along at least a portion of the glow plug heater rod. A gas turbine engine including such an igniter is further disclosed.

公开(公告)号：US20220154682A1

公开(公告)日：2022-05-19

申请号：US17494993

申请日：2021-10-06

申请人： PRATT & WHITNEY CANADA CORP.

发明人： Richard Freer ,  Antwan Shenouda

IPC分类号： F02P19/02 ,  F02C7/266 ,  H05B1/02 ,  G05D23/24

摘要： A method for operating a glow plug includes controlling a temperature of the glow plug by switching between applying a voltage VH and applying a voltage VN

公开(公告)号：US11268486B2

公开(公告)日：2022-03-08

申请号：US16369661

申请日：2019-03-29

申请人： PRATT & WHITNEY CANADA CORP.

发明人： Richard Freer ,  Kian Mccaldon ,  Tin-Cheung John Hu ,  Michel Bousquet ,  André Fortin

IPC分类号： F02C7/264 ,  F02C7/266 ,  F02P19/02 ,  F23R3/30 ,  F23D11/44 ,  F23R3/34 ,  F23Q7/00

摘要： There is disclosed an igniter for a gas turbine engine including: a base, a glow plug heater rod, the glow plug heater rod extending from the base along an axis and terminating in a rod end, a sleeve extending circumferentially around the glow plug heater rod along at least a portion of a length of the glow plug heater rod, the sleeve having an inner surface spaced from the glow plug heater rod to provide a gap between the inner surface and the glow plug heater rod, the gap extending radially relative to said axis.

公开(公告)号：US11233470B2

公开(公告)日：2022-01-25

申请号：US16411267

申请日：2019-05-14

申请人： PRATT & WHITNEY CANADA CORP.

发明人： Eric Latulipe ,  Richard Freer

IPC分类号： H02P6/12 ,  B64D35/08 ,  H02K47/04 ,  B64D27/02 ,  B64D27/10 ,  B64D27/24 ,  B64D31/06 ,  F01D15/10 ,  F02K3/06 ,  H02P5/74 ,  H02P9/00 ,  B64D27/26 ,  B64D31/00 ,  H02K51/00 ,  H02P17/00 ,  B60L50/13 ,  B60L50/60 ,  B60L53/24 ,  B60L50/51 ,  B64D27/12 ,  H02K19/34 ,  H02P6/00 ,  B64D35/02 ,  G08C19/38 ,  H02K41/03 ,  B64D35/00 ,  H02P101/25 ,  H02P101/30

摘要： There is described a method and system for operating a hybrid electric aircraft propulsion system. The method comprises modulating AC electric power applied to a first electric propulsor or a second electric propulsor from at least one motor inverter to synchronize the frequency of the first electric propulsor or the second electric propulsor with the frequency of a generator.

公开(公告)号：US20200079521A1

公开(公告)日：2020-03-12

申请号：US16411267

申请日：2019-05-14

申请人： PRATT & WHITNEY CANADA CORP.

发明人： Eric LATULIPE ,  Richard Freer

IPC分类号： B64D35/08 ,  H02K47/04 ,  H02K19/34 ,  H02P6/00

摘要： There is described a method and system for operating a hybrid electric aircraft propulsion system. The method comprises modulating AC electric power applied to a first electric propulsor or a second electric propulsor from at least one motor inverter to synchronize the frequency of the first electric propulsor or the second electric propulsor with the frequency of a generator.

公开(公告)号：US20240333020A1

公开(公告)日：2024-10-03

申请号：US18435580

申请日：2024-02-07

申请人： Pratt & Whitney Canada Corp.

发明人： Raphael Gariepy ,  Simon Lam ,  Remi Robache ,  Antwan Shenouda ,  Richard Freer

IPC分类号： H02J7/14 ,  H02J7/00

CPC分类号： H02J7/1423 ,  H02J7/005

摘要： An assembly for an aircraft includes a battery, a charger, and a battery monitoring system. The battery includes a plurality of battery strings. The charger is configured to charge the plurality of battery strings. The battery monitoring system further includes a processor in communication with a non-transitory memory storing instructions, which instructions when executed by the processor, cause the processor to determine the battery string voltage for each battery string of the plurality of battery strings, identify a highest-voltage battery string of the plurality of battery strings and a lower-voltage subset of the plurality of battery strings, and sequentially charge each battery string of the lower-voltage subset of the plurality of battery strings with the charger to a first target string voltage.

公开(公告)号：US11990806B2

公开(公告)日：2024-05-21

申请号：US17514661

申请日：2021-10-29

申请人： PRATT & WHITNEY CANADA CORP.

发明人： Eric Latulipe ,  Richard Freer

IPC分类号： H02K29/03 ,  F16H1/22 ,  H02K7/116 ,  H02K16/02

CPC分类号： H02K29/03 ,  F16H1/22 ,  H02K7/116 ,  H02K16/02

摘要： An electric machine system described herein comprises a first electric machine rotor, a first gear and a second gear. The first gear is connected to the first electric machine rotor and to a first input/output shaft. The second gear is connected to the first electric machine rotor and to a second input/output shaft. The first electric machine rotor is disposed between the first gear and the second gear.

公开(公告)号：US20240133335A1

公开(公告)日：2024-04-25

申请号：US17971239

申请日：2022-10-20

申请人： Pratt & Whitney Canada Corp.

发明人： Richard Freer

IPC分类号： F01P7/16 ,  F01P11/08

CPC分类号： F01P7/16 ,  F01P11/08 ,  F01P2007/146

摘要： An aircraft propulsion system and method of cooling the same are provided. The system includes a hydraulic pump, an intermittent IC engine, a hydraulic motor, an engine oil pump, and a cooling system. The intermittent IC engine drives the hydraulic pump. The hydraulic motor is powered by the hydraulic pump and drives a propulsor fan. The cooling system includes a first heat exchanger (AIR-EO HEX) and a second heat exchanger (EO-HF HEX). The AIR-EO HEX transfers heat between flows of engine oil and ambient air. The EO-HF HEX transfers heat between flows of engine oil and hydraulic fluid. The hydraulic pump provides motive force to cause the hydraulic oil to pass through the EO-HF HEX and back to the at least one hydraulic pump. The engine oil pump provides motive force to pass the engine oil to and through the AIR-EO HEX, the EO-HF HEX, and the intermittent IC engine.

公开(公告)号：US20230045952A1

公开(公告)日：2023-02-16

申请号：US17402474

申请日：2021-08-13

申请人： Pratt & Whitney Canada Corp.

发明人： Richard Freer

IPC分类号： B64D41/00 ,  H02J1/00 ,  B64D27/24

摘要： In accordance with at least one aspect of this disclosure, there is provided a system for aircraft power. The system includes a DC/DC converter having a DC input and a DC output and a switching circuit connecting the DC input to the DC output operable to vary voltage at the DC output. A control module is operatively connected to the switching circuit for variable control of the DC output. The control module includes machine readable instructions to cause the control module to receive input indicative of altitude and control the switching circuit to vary voltage of the DC output as a function of environmental conditions such as altitude and humidity. In embodiments the altitude sensor is operatively connected to the controller.