公开(公告)号：US09821901B2

公开(公告)日：2017-11-21

申请号：US14546252

申请日：2014-11-18

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Brant Duke ,  James Robert Jarvo ,  Michael Mark ,  Mario Guerra

IPC: B64C11/30 ,  B64D45/00 ,  F01D7/00 ,  G01P3/487 ,  G01P3/488 ,  B64C11/06 ,  G01D5/14 ,  G01D5/245

CPC classification number: B64C11/301 ,  B64C11/06 ,  B64D45/00 ,  F01D7/00 ,  G01D5/145 ,  G01D5/2451 ,  G01P3/487 ,  G01P3/488

Abstract: A system and method for blade angle position feedback. The system comprises an annular member operatively connected to rotate with a propeller, a sensor fixedly mounted adjacent the annular member and configured for detecting a passage of each singularity as the annular member is rotated and axially displaced and for generating a sensor signal accordingly, the annular member and sensor configured for relative axial displacement between a first relative axial position and a second relative axial position respectively corresponding to the first and the second mode of operation, and a detection unit connected to the sensor for receiving the sensor signal therefrom, determining on the basis of the sensor signal a time interval elapsed between the passage of successive singularities, and computing from the time interval blade angle position.

公开(公告)号：US12180901B2

公开(公告)日：2024-12-31

申请号：US16713226

申请日：2019-12-13

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： James Robert Jarvo ,  Kenneth Matheson ,  Mario Guerra

IPC: F02C9/58 ,  B64C11/44 ,  B64D27/10 ,  B64D31/04 ,  B64D31/06

Abstract: Methods and system are described for operating an aircraft powerplant comprising an engine coupled to a variable-pitch propeller. The method comprises receiving a request to change a propeller rotational speed from a first setting to a second setting, determining a power need for the engine, when the power need corresponds to the second setting, modifying a command for at least one of fuel flow to the engine and oil flow to the propeller to govern the powerplant in accordance with the second setting for the propeller rotational speed, and when the power need does not correspond to the second setting, overriding the request to change the propeller rotational speed from the first setting to the second setting.