Systems and methods for fluid purging in a fuel delivery system
AssigneeWoodward, Inc.
InventorsMichael Hahn, Ethan Altwegg
Life of this patent
Estimating the term…
Abstract
Systems and methods are provided for a fuel delivery system. For example, the system includes a purge valve that is connected to a first channel providing fuel to the engine. A shutoff valve is connected to the purge valve via a second channel, the pressure through which can control activation of the purge valve. In activating the shutoff valve, a pressure at the second channel changes from a low pressure to a higher pressure, forcing the purge valve to close. This causes the purge valve to purge a volume of fluid into the first channel, such as in response to a fuel-off situation.
Claims20
A system to deliver fuel to an engine, the system comprising:
- a purge valve connected to a first channel providing fuel to the engine;
- and
- a shutoff valve connected to the purge valve via a second channel, wherein activating the shutoff valve causes a pressure at the second channel to change from a low pressure to a higher pressure, forcing the purge valve to close.
A system to deliver fuel to an engine, the system comprising:
- a purge valve connected to a first channel providing fuel to the engine;
- a shutoff valve connected to the purge valve via a second channel;
- and
- a valve operable to connect the shutoff valve with a high pressure channel,
- wherein connecting the shutoff valve with the high pressure channel causes a pressure at the second channel to change from a low pressure to a high pressure, forcing the purge valve to close.
A method of purging a fuel delivery system, the method comprising:
- charging a first channel with a high pressure fluid from a reservoir;
- activating a valve to connect the first channel to a shutoff valve;
- activating the shutoff valve in response to the high pressure fluid;
- changing a pressure in a purge line between the shutoff valve and a purge valve from a low pressure to a high pressure in response to activation of the shutoff valve;
- and
- activating the purge valve based at least in part on the change in pressure in the purge line.
Dependencies are inferred from the claim text.