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US 11,761,387 B1Granted
System and method for fuel pump shutdown
AssigneeFord Global Technologies, LLC
InventorsBrien Fulton, Carlos Armesto, Laural Suzanne-Hughes Feldmeier, Kevin M. Bird, Christopher Woodring, Timothy J. Knott
Life of this patent
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Abstract
Methods and systems for operating an engine that includes two fuel pumps are described. In one example, a first fuel pump may be activated or remain activated in response to an engine shutdown request so that a second fuel pump may be cooled before the first fuel pump is deactivated in response to the engine shutdown request.
Claims20
An engine operating method, comprising:
- via a controller, adjusting an operating state of a first fuel pump in response to an engine shutdown request and a temperature, the first fuel pump arranged serially with a second fuel pump.
An engine system, comprising:
- a diesel engine;
- a first fuel pump;
- a second fuel pump including a volume control valve;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to adjust an operating state of the first fuel pump in response to a temperature and a request to shutdown the diesel engine, where the temperature is a fuel temperature at the second fuel pump or a temperature of the second fuel pump.
2 more elements
An engine operating method, comprising:
- via a controller, cycling a first fuel pump on and off a plurality of times in response to an engine shutdown request and an output of a fuel deposit model, the first fuel pump arranged serially with a second fuel pump.
Dependencies are inferred from the claim text.