Patent ID: 8234875
Filing Date: 2012-08-07
Classification: F02C,F05D

Abstract:
1. A method of managing fuel within a fuel system for a turbine engine comprising the steps of: a) rotating a pump in a first direction which creates a first differential pressure; b) automatically opening a shut-off valve with the first differential pressure for supplying fuel to a turbine engine; c) reversing rotation of the pump to a second direction which creates second and third differential pressures; and d) automatically opening an ecology valve with the second differential pressure for evacuating fuel from the turbine engine, and automatically closing the shut-off valve with the third differential pressure; wherein the pump includes first and second ports respectively providing first and second pressures, the first and second ports respectively providing an inlet and an outlet in the first direction, and the first and second ports respectively providing the outlet and the inlet in the second direction; and wherein the first differential pressure is provided by exposing the shut-off check valve to the first and second pressures, the second pressure greater than the first pressure in the first direction.