Patent ID: 6305156
Filing Date: 2001-10-23
Classification: B64D,F02C,F05D,Y02T

Abstract:
An integrated bleed air and engine starting system for an engine, comprising:an air turbine starter subsystem comprising a turbine mechanically coupled to said engine, a compressor mechanically coupled to said turbine, and a variable nozzle upstream of said turbine;said variable nozzle having an open position that allows said bleed air to flow to said turbine; andan air flow subsystem that includes a diverter valve downstream of said turbine and an isolation valve upstream of said variable nozzle;said diverter valve having a feed position that flows to an environmental control system a mixture of an exhaust from said turbine with a compressed air from said compressor;whereby said air flow subsystem selectively directs said bleed air through said variable nozzle and to said turbine or through said isolation valve, around said turbine, and to said environmental control system, said air flow subsystem also enables an auxiliary air flow from an auxiliary power unit to flow to said isolation valve and be selectively received by said turbine.