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US 2014/0360260 A1Published application
Fuel level inference from canister temperatures
AssigneeFord Global Technologies, LLC
InventorsAed M. Dudar, Mark Daniel Bunge, Dennis Seung-Man Yang
Life of this patent
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Abstract
Methods and systems for inferring a fuel level in a fuel tank based on temperature changes in a carbon canister are disclosed. In one example approach a method comprises, indicating a fuel level in a fuel tank based on a temperature change of adsorbent in a carbon canister during refueling.
Claims20
A method for an engine with an evaporative emission control system, comprising:
- indicating a fuel level in a fuel tank based on a temperature change of adsorbent in a carbon canister during refueling.
A method for an engine with an evaporative emission control system, comprising:
- indicating an amount of fuel added to a fuel tank during a refueling event based on a time duration of a temperature change of adsorbent in a carbon canister during the refueling event.
A method for an engine with an evaporative emission control system, comprising:
- indicating an amount of fuel added to the fuel tank during the refueling based on a time duration of a temperature change during refueling from an initial temperature change in a carbon canister until an inflection point in temperature in the canister;
- and
- indicating an instantaneous fuel level based on a difference between the amount of fuel added to the fuel tank and an amount of fuel delivered to fuel injectors.
Dependencies are inferred from the claim text.