公开(公告)号：US20210388768A1

公开(公告)日：2021-12-16

申请号：US16899337

申请日：2020-06-11

Applicant: HONEYWELL INTERNATIONAL INC.

Inventor： Kevin A.K. Jones ,  Jennifer Dubec Tucker ,  Zachary Sherwin

IPC: F02C7/27 ,  F01D19/00

Abstract: An air turbine start system includes an air supply duct, an air turbine starter, a starter air valve, a stepper motor, and a controller. The air turbine starter is coupled to the air supply duct to selectively receive a flow of pressurized air therefrom. The starter air valve is mounted on the air supply duct and is movable between a closed position and a plurality of open positions. The stepper motor is coupled to the starter air valve and is configured, in response to valve position commands, to move the starter air valve between the closed position and one or more of the plurality of open positions. The controller is coupled to the stepper motor and is configured to supply the valve position commands to the stepper motor and determine a position of the starter air valve based on the valve position commands supplied to the stepper motor.