Invention Grant
- Patent Title: System and method for controlling engine speed with bowed rotor mitigation
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Application No.: US16852856Application Date: 2020-04-20
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Publication No.: US11359546B2Publication Date: 2022-06-14
- Inventor: Cecilia Lam
- Applicant: HONEYWELL INTERNATIONAL INC.
- Applicant Address: US NJ Morris Plains
- Assignee: HONEYWELL INTERNATIONAL INC.
- Current Assignee: HONEYWELL INTERNATIONAL INC.
- Current Assignee Address: US NJ Morris Plains
- Agency: Lorenz & Kopf, LLP
- Main IPC: F02C7/277
- IPC: F02C7/277 ; F01D25/34

Abstract:
Systems and methods to operate an engine in a bowed rotor mitigation mode. An engine starting system includes a starter coupled to the engine and with a compressor. A conduit system communicates a portion of the compressed air from the compressor to the starter. A load control valve controls compressed air from the compressor to the starter and to other loads. A starter air valve controls compressed air through the conduit system to the starter. At least one controller: receives a start signal from the engine; determines whether to initiate a bowed rotor mitigation of the engine; operates either the load control valve or the starter air valve to move to a predetermined static position; and operates the other of the load control valve or the starter air valve to achieve a target speed of the engine.
Public/Granted literature
- US20210324801A1 SYSTEM AND METHOD FOR CONTROLLING ENGINE SPEED Public/Granted day:2021-10-21
Information query
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