FUEL SYSTEM FOR AIRCRAFT ENGINES

摘要

A fuel pump system for an aircraft engine having a booster pump that is always on during maneuvers and malfunction of primary fuel pump is disclosed. During fuel pressure loss, the boost pump and warning systems for the pilot are activated. The booster pump off and on up process are continued up to a maximum of a predefined number of times at a predetermined time interval in order to confirm that the low pressure was not due to an air bubble, or sensor glitch. The cyclic on and off process is performed only when the aircraft is at a safe altitude above ground level. If the aircraft is in close proximity to the ground and the pressure drops, the boost pump will be activated and remain on without cycling until the aircraft is at a safe altitude, or the aircraft is parked and the engine has been turned off.