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:
Feb. 12, 1991
Filed:
Apr. 21, 1989
Applicant:
Inventor:
Bradley C Schafer, Manchester, CT (US);
Assignee:
United Technologies Corporation, Hartford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02C / ;
U.S. Cl.
CPC ...
60 3929 ;
Abstract
A gas turbine engine control system modulates a compressor bleed valve between full open and full closed during transient engine operation as a function of the rate of change of compressor speed biased by flight conditions, such as altitude, and corrected for engine power level. A hysteresis construct may be applied to the rate of change of compressor speed before such rate is used to determine the new bleed valve position.