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US 10,472,083 B2Granted
Selective method of operation of ullage passivation system
AssigneeHamilton Sundstrand Corporation
InventorJonathan Rheaume
Life of this patent
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Abstract
A method of selectively operating an ullage passivation system includes receiving at least one of a temperature signal and a vapor composition signal. The method further includes operating an ullage passivation system to provide a fluid to the fuel tank, in response to at least one of a temperature exceeding a temperature threshold and a component of the vapor composition exceeding a threshold composition.
Claims17
An aircraft safety system, comprising:
- a ullage passivation system arranged to selectively provide a gas flow to ullage in a fuel tank;
- the ullage passivation system including:
- a sensor disposed in a fuel tank and sensing a temperature of ullage in the fuel tank and/or a vapor composition of ullage in the fuel tank;
- another sensor disposed within a wing or a fuselage and sensing an ambient air humidity, and
- a controller in communication with the ullage passivation system, the controller being programmed to selectively operate the ullage passivation system to provide the gas flow to ullage in the fuel tank based on:
- the ambient air humidity in the wing or fuselage exceeding a humidity threshold;
- and
- at least one of the temperature of ullage in the fuel tank and the vapor composition of ullage in the fuel tank respectively exceeding a temperature threshold and a threshold composition.
5 more elements
A controller for an aircraft safety system, comprising:
- input communication channels configured to receive ambient air humidity information representing an ambient air humidity in a wing and/or fuselage and at least one of temperature information representative of a temperature of ullage in a fuel tank and vapor composition information representative of a vapor composition of ullage in the fuel tank;
- output communication channels configured to provide commands to a ullage passivation system;
- and
- control logic configured to, in response to the ambient air humidity in the wing and/or fuselage exceeding a humidity threshold and at least one of the temperature of ullage in the fuel tank exceeding a temperature threshold and the vapor composition of ullage in the fuel tank exceeding a threshold composition, operate the ullage passivation system to provide a gas flow to ullage the in the fuel tank.
1 more element
A method of selectively operating a ullage passivation system, comprising:
- receiving:
- an ambient air humidity signal representing an ambient air humidity in a wing and/or fuselage of an aircraft;
- and
- at least one of a temperature signal representing a temperature of ullage in a fuel tank and a vapor composition signal representing a vapor composition of ullage in the fuel tank;
- and
- operating the ullage passivation system to provide a gas flow to ullage in the fuel tank, in response to the ambient air humidity in the wing and/or fuselage exceeding a humidity threshold and at least one of the temperature of ullage in the fuel tank exceeding a temperature threshold and the vapor composition of ullage in the fuel tank exceeding a threshold composition.
3 more elements
Dependencies are inferred from the claim text.