Patent ID: 7942079
Filing Date: 2011-05-17
Classification: F02C,F05D,Y10T

Abstract:
1. A gearbox for driving an auxiliary turbine engine component comprising: an input shaft driving at least one input gear, the input shaft configured to receive rotational drive from a turbine engine; an auxiliary input shaft coupled to first and second clutches, the first and second clutches are configured to provide first and second rotational speeds to the auxiliary input shaft; an auxiliary component operatively coupled to the auxiliary input shaft; a first output gear coupling the at least one input gear and first clutch, and a second output gear coupling the at least one input gear and second clutch, the first and second output gears configured to be rotationally driven simultaneously by the input shaft; an actuator for selectively engaging the second clutch; and a controller programmed to command the actuator to engage the second clutch based upon which of the first and second rotational speeds corresponds to a desired rotational speed for the auxiliary component, wherein the first clutch is an overrunning clutch, the gearbox is configured such that the first clutch is rotationally overrun in response to engagement of the second clutch.