Method for transferring hydraulic power between two hydraulic systems in an aircraft, use of a power control unit and drive system in an aircraft

摘要

A method for transferring hydraulic power between at least two hydraulic systems (54, 55) in an aircraft (2), the aircraft (2) having a drive system (4) comprising at least one mechanical transmission (10, 14, 44, 46) connected to a power control unit (22, 24), the power control unit (22, 24) having a first hydraulic displacement machine (34) connected to a first hydraulic system (54) and a second hydraulic displacement machine (36) connected to a second hydraulic system (55), comprises the steps of connecting both hydraulic displacement machines (34, 36) to a differential gear unit (28) having a common mechanical output (52), arresting the common mechanical output (52), operating the first hydraulic displacement machine (34, 36) in a motor mode under consumption of hydraulic power of the first hydraulic system (54) such that the second hydraulic displacement machine (34, 36) is mechanically rotated in a pump mode and supplies hydraulic power to the second hydraulic system (55). Thereby a power transfer between two hydraulic systems may be conducted without installing a dedicated power transfer unit (PTU) and under use of a power control unit (PCU) for driving high lift devices.