Patent ID: 6910851

Claim:
A turbofan jet engine, comprising: a turbine case including at least a high pressure turbine section and a low pressure turbine section; a fan case disposed around at least a portion of the turbine case and spaced apart therefrom to form a bypass flow passage; and a valve assembly mounted in the engine, the valve assembly including: a valve body having at least a fluid inlet port in fluid communication with the bypass flow passage, a first fluid outlet port in fluid communication with the low pressure turbine case section, and a second fluid outlet port in fluid communication with the high pressure turbine case section, and a valve disposed in the valve body and selectively moveable between (i) a closed position, in which only the first fluid outlet port is in substantial fluid communication with the fluid inlet port to thereby supply cooling air to the low pressure turbine case section, and (ii) an open position, in which the first fluid outlet port and the second fluid outlet port are both in substantial fluid communication with the fluid inlet port to thereby supply cooling air to the low pressure turbine case section and the high pressure turbine case section.