Aircraft aircrew life support systems

Details Aircraft aircrew life support systems Aircraft aircrew life support systems

B - Operations, Transporting

64

D

137/1.5

B64D 13/00 (2006.01) A62B 7/14 (2006.01) A62B 9/02 (2006.01)

Patent

CA 1297377

ABSTRACT Title: Aircraft Aircrew Life Support System An aircrew life support system has an on-board oxygen generating system (OBOGS) connected for delivering oxygen-enriched product gas to a breathing demand regulator and a plenum storage container. The concentration of oxygen in the product gas is sensed by a gas concentration sensor which supplies signals to an electronic control unit (ECU). The ECU outputs signals for switching a control valve which controls product gas to be delivered to the regulator from either the OBOGS or the storage container. The ECU also outputs signals to a charge valve which is opened to allow product gas from the OBOGS to charge the storage container when product gas enriched with oxygen above a predetermined concentration is being delivered by the OBOGS and there is excess capacity over the demand requirements at the regulator. The breathing demand regulator provides for mixing of the OBOGS product gas or of the stored gas with cabin air to provide a breathing gas matched to physiological requirements under all operational conditions, both normal and emergency and, especially to provide for long-term sea level breathing from the stored gas when the OBOGS is not operating.

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