A system and method for supplementing fuel feed pressure and flow within an override-based aircraft fuel system. The aircraft fuel system includes primary (110) and auxiliary (120) fuel tanks, boost (112) and override (122) fuel pumps delivering fuel from the tanks to a fuel manifold (130), and a jettison fuel pump (124) operable to draw fuel from the auxiliary fuel tank (120). The method includes the steps of: (a) sensing whether the aircraft engine is operating near maximum power; (b) upon sensing the condition, operating the jettison fuel pump (124) in fluid interconnection with the override fuel pump (122) to deliver fuel to the fuel manifold 130); and (c) upon sensing the cessation of the condition, deactivating the jettison fuel pump (124). The system includes a engine monitoring circuit configured to signal when the aircraft engine speed is greater than a predetermined threshold, and a fuel system control circuit configured to operate a jettison fuel pump enable circuit portion in response to the signal, omitting other jettisoning operations, in order to deliver fuel to the fuel manifold. The jettison fuel pump (124) consequently functions as an override fuel pump assist.
Speed card-controlled override fuel pump assist
Triebwerkleistungsgesteuerte Treibstoffversorgung mittels Hilfspumpe
Alimentation en carburant pour régime moteur maximal, l'alimentation en carburant impliquant une pompe d'appoint
19.04.2017
Patent
Elektronische Ressource
Englisch
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