Patent Number: 6,305,156

Title: Integrated bleed air and engine starting system

Abstract: An integrated bleed air and engine starting system for an engine utilizes an innovative flow multiplier air turbine starter to provide bleed air supply to an ECS as well as starting an engine. The technique reduces bleed air consumption by mixing fan stage air and high stage air for ECS fresh air usage. It also can eliminate or reduce the size of the precooler heat exchanger. The system includes an air turbine starter subsystem and an air flow subsystem. The air turbine starter subsystem includes a compressor, a turbine, and a common shaft fixed between the compressor and turbine. Also provided is a gear coupled to a gearbox which links the engine with a shaft, as well as a variable nozzle valve intermediate the turbine and engine. The air flow subsystem comprises a diverter valve downstream of the turbine, an isolation valve intermediate the turbine and an auxiliary power unit, and a check valve downstream of the compressor and turbine. A fan is in air flow communication with the compressor and engine.

Inventors: Lui; Clarence (Diamond Bar, CA)

Assignee: AlliedSignal Inc.

International Classification: B64D 13/06 (20060101); B64D 13/00 (20060101); F02C 7/26 (20060101); F02C 6/00 (20060101); F02C 7/277 (20060101); F02C 7/32 (20060101); F02C 6/08 (20060101); F02C 7/00 (20060101); F02C 006/08 (); F02C 007/27 ()

Expiration Date: 10/23/2018