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:
Jun. 23, 1992
Filed:
Feb. 14, 1991
Colin Rodgers, San Diego, C;
Sundstrand Corporation, Rockford, IL (US);
Abstract
A method of starting a gas turbine engine eliminating the need for oversizing a starter motor or the like to attain a proper transition through the 'pinch point' includes the steps of applying a torque from an external source to the gas turbine engine (10) to accelerate the same toward a self sustaining speed, igniting fuel in the engine (10) at a pre-determined speed less than the self-sustaining speed, and at or about the time of fuel ignition, momentarily increasing the torque applied to accelerate the engine (10). The acceleration torque and momentary increase can be achieved by applying torque from a gas turbine containing auxiliary power unit (20) to an engine (10) either mechanically or pneumatically and then overspeeding and/or increasing the turbine inlet temperature of the gas turbine within the APU (20) to achieve a momentary burst of torque.