초록 ▼

A novel diagnostic system used in conjunction with an engine electronic control automatically determines start bleed strap failure in a gas turbine engine. The system indirectly determines engine start bleed strap failure without a separate sensor. A normal turbine temperature to engine inlet temper

A novel diagnostic system used in conjunction with an engine electronic control automatically determines start bleed strap failure in a gas turbine engine. The system indirectly determines engine start bleed strap failure without a separate sensor. A normal turbine temperature to engine inlet temperature ratio and burner pressure to engine inlet pressure ratio relationship is established. A failed engine start bleed strap corresponds to a high turbine temperature to engine inlet temperature ratio at a given burner pressure to engine inlet pressure ratio.

대표청구항 ▼

In a gas turbine engine with operating conditions including a control mode and an engine operating power level having a band of intermediate power levels, the engine further having an engine start bleed strap, a diagnostic system for use with an engine electronic controller, said diagnostic system c

In a gas turbine engine with operating conditions including a control mode and an engine operating power level having a band of intermediate power levels, the engine further having an engine start bleed strap, a diagnostic system for use with an engine electronic controller, said diagnostic system comprising: a means for receiving signals indicative of a plurality of engine parameters including temperature of an engine turbine, engine inlet total temperature, pressure in an engine burner and engine inlet total pressure; and a computing means receiving said parameter signals and signals indicative of the engine operating conditions, said computing means for comparing said engine operating signals with preselected values thereof and, in dependence on said comparison, for computing a relationship between said engine temperatures and a relationship between said engine pressures, said computing means further for arithmetically determining a computed engine temperature - pressure relationship from said computed engine temperature relationship and said engine pressure relationship, comparing said computed engine temperature - pressure relationship with preselected values thereof and automatically providing signals indicative of a failed engine start bleed strap based on said comparison.