Invention Grant
- Patent Title: Modified start sequence of a gas turbine engine
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Application No.: US16034550Application Date: 2018-07-13
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Publication No.: US10787277B2Publication Date: 2020-09-29
- Inventor: Matthew D. Teicholz , Jeffrey W. Sutliff , William H. Greene, Jr. , Kenneth J. White , Matthew R. Feulner , John P. Virtue, Jr. , Jorn A. Glahn , Philip D. Hoover , Victor M. Pinedo , Jason B. Solomonides
- Applicant: United Technologies Corporation
- Applicant Address: US CT Farmington
- Assignee: RAYTHEON TECHNOLOGIES CORPORATION
- Current Assignee: RAYTHEON TECHNOLOGIES CORPORATION
- Current Assignee Address: US CT Farmington
- Agency: Cantor Colburn LLP
- Main IPC: B64F1/34
- IPC: B64F1/34 ; F02C7/277 ; B64D27/16 ; F02C7/27

Abstract:
A system for starting a gas turbine engine of an aircraft is provided. The system includes a pneumatic starter motor, a discrete starter valve switchable between an on-state and an off-state, and a controller operable to perform a starting sequence for the gas turbine engine. The starting sequence includes alternating on and off commands to an electromechanical device coupled to the discrete starter valve to achieve a partially open position of the discrete starter valve to control a flow from a starter air supply to the pneumatic starter motor to drive rotation of a starting spool of the gas turbine engine below an engine idle speed, where the controller modulates a duty cycle of the discrete starter valve via pulse width modulation.
Public/Granted literature
- US20180327117A1 MODIFIED START SEQUENCE OF A GAS TURBINE ENGINE Public/Granted day:2018-11-15
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