The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 2020
Filed:
May. 22, 2018
United Technologies Corporation, Farmington, CT (US);
Matthew D. Teicholz, Mystic, CT (US);
Jeffrey W. Sutliff, West Hartford, CT (US);
William H. Greene, Jr., Coventry, CT (US);
Kenneth J. White, West Hartford, CT (US);
Matthew R. Feulner, West Hartford, CT (US);
John P. Virtue, Jr., Middletown, CT (US);
Jorn A. Glahn, Manchester, CT (US);
Philip D. Hoover, Glastonbury, CT (US);
Victor M. Pinedo, Bridgeport, CT (US);
Jason B. Solomonides, Cromwell, CT (US);
UNITED TECHNOLOGIES CORPORATION, Farmington, CT (US);
Abstract
A system for controlling a start sequence of a gas turbine engine includes an electronic engine control system, a thermal model, memory, a model for determining a time period (t), and a controller. The thermal model synthesizes a heat state of the gas turbine engine. The memory records the current heat state at shutdown and a shutdown time of the gas turbine engine. The model for determining the time period is for motoring the gas turbine engine at a predetermined speed Nthat is less than a speed to start the gas turbine engine, where tis a function of the heat state recorded at engine shutdown and an elapsed time of an engine start request relative to a previous shutdown time. The controller modulates a starter valve to maintain the gas turbine engine within a predetermined speed range of Nto Nfor homogenizing engine temperatures.