초록 ▼

This invention relates to a hydraulic control system for an aircraft starter-drive mechanism that includes a generator that can be driven as a motor drivingly connected through a differential, which is mutually connected to first and second hydraulic units and to an engine drive shaft during a start

This invention relates to a hydraulic control system for an aircraft starter-drive mechanism that includes a generator that can be driven as a motor drivingly connected through a differential, which is mutually connected to first and second hydraulic units and to an engine drive shaft during a start mode. The hydraulic control system includes a control valve arrangement, cooperatively coupled to the first and second hydraulic units, and operative in the starting mode to control flow between the hydraulic units, to thereby divide the delivery of rotary power from the generator/motor to the engine drive shaft through the differential and the hydraulic units.

대표청구항 ▼

A starter-drive for use between an aircraft engine and a generator/motor to transmit in either direction, comprising: a first shaft connectible with said generator/motor, a second shaft connectible with said engine, a differential including first, second and third elements, said first element rotata

A starter-drive for use between an aircraft engine and a generator/motor to transmit in either direction, comprising: a first shaft connectible with said generator/motor, a second shaft connectible with said engine, a differential including first, second and third elements, said first element rotatable with said second shaft and said third element rotatable on said second shaft, a first hydraulic unit drivingly connected to said first element, a second hydraulic unit drivingly connected to said second element, said first and second hydraulic units hydraulically interconnected through and controlled by a control valve, said third element drivingly connected through a first clutch to said first shaft for driving said generator/motor in a generating mode, and through a second clutch to said first shaft for driving said engine from said generator/motor in a starting mode, said control valve operative in said starting mode to control flow between said hydraulic units to thereby divide the delivery of rotary power from the generator/motor to said second shaft and said engine through said differential and said hydraulic units.