Patent ID: 9021869
Filing Date: 2015-05-05
Classification: F02C,F02M

Abstract:
1. A method for managing the operation of a metering unit of a fuel injection system of a turbomachine, comprising: determining reliability conditions of a flowmeter of the fuel injection system to determine whether or not there is currently confidence in the flowmeter; selecting a channel of the metering unit which provides a closest theoretical value to a value measured by the flowmeter if there is currently confidence in the flowmeter; selecting a last channel that was previously selected a last time there was confidence in the flowmeter, if there is currently a lack of confidence in the flowmeter and there was previously confidence in the flowmeter; calculating a theoretical fuel flow rate of each channel by based on a position of the channel and a dosing function; determining if the theoretical fuel flow rate of each channel is within an interval of flow rate values centered on a flow rate value measured by the flowmeter; selecting a channel having a position which presents a highest theoretical fuel flow rate value within the interval of flow rate values centered on the flow rate value measured by the flowmeter, if there is currently a lack of confidence in the flowmeter and there was previously a lack of confidence in the flowmeter and at least one of the theoretical fuel flow rates is within the interval of flow rate values centered on the flow rate value measured by the flowmeter; and selecting a channel having a position which presents the highest theoretical flow rate value, if there is currently a lack of confidence in the flowmeter and there was previously a lack of confidence in the flowmeter and none of the theoretical fuel flow rates are within the interval of flow rate values centered on the flow rate value measured by the flowmeter.