Back to results
US 2019/0293017 A1Published application
System and methods for operating fuel system responsive to inferred fuel temperature
AssigneeFord Global Technologies, LLC
InventorsJoseph Ulrey, Ross Pursifull
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for an engine to infer fuel temperature from a measured rate of change in a pressure of a fuel passage between a low pressure fuel pump and a high pressure fuel pump during certain operating conditions, including when the low pressure fuel pump is switched off. The operation of the low pressure fuel pump may be adjusted responsively to a change in the inferred fuel temperature.
Claims20
A method for an engine, comprising:
- adjusting operation of a low-pressure fuel pump based on a fuel temperature indicated from a rate of change in a pressure of a fuel passage between the low-pressure fuel pump and a high-pressure fuel pump during a first condition, including when the low pressure fuel pump is switched off.
An engine system, comprising:
- a controller with computer readable instructions stored on non-transitory memory that when executed cause the controller to,
- measure a rate of change in a fuel passage pressure with a pressure sensor during a first condition, including when a low-pressure fuel pump (LPFP) is switched off,
- infer a fuel temperature from the rate of change in the fuel passage pressure, and
- adjust operation of the LPFP responsive to a change in the inferred fuel temperature.
1 more element
A method for an engine, comprising:
- determining a rate of change of pressure in a fuel passage pressure responsive to a high pressure fuel pump injecting a threshold volume of fuel to the engine while a low pressure fuel pump (LPFP) is off,
- inferring a fuel temperature from the rate of change in the fuel passage pressure, and
- adjusting a fuel injection rate to the engine responsive to a change in the inferred fuel temperature.
Dependencies are inferred from the claim text.