Integrated power unit
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United States of America Patent
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Aug 17, 1993
Grant Date -
N/A
app pub date -
Sep 21, 1989
filing date -
Sep 21, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to secondary power system apparatus and method for use aboard aircraft in place of conventional auxiliary power units (APU's) and emergency power units (EPU's). The invention integrated power unit (IPU) performs the function of both an APU and an EPU, while avoiding the use of hazardous monofuels. The IPU includes a turbine engine operable on pressurized ambient air, or on pressurized stored air, along with jet engine fuel. The structure of a combustion chamber for the engine which is able to use pressurized air from two separate sources; of a control able to selectively operate the engine as an EPU, as and APU, and to effect operating transition from EPU to APU; and of a complete secondary power system with the IPU are all disclosed.
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