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US 9,284,924 B2Granted
Vehicle refueling detection method utilizing hydrocarbon sensor
AssigneeFord Global Technologies, LLC
InventorsAed M. Dudar, Dennis Seung-Man Yang
Life of this patent
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Abstract
Embodiments for detecting fuel events are presented. In an embodiment, a method comprises performing an action responsive to a fuel event indicated based on output from a hydrocarbon sensor positioned between a fuel tank and a fuel vapor canister. In this way, the hydrocarbon sensor may be used to detect fuel events and engine operation may be adjusted accordingly.
Claims19
A method for a fuel system, comprising:
- unlocking a fuel door responsive to completion of depressurization of a fuel tank indicated based on output from a hydrocarbon sensor positioned in a line which couples the fuel tank with a fuel vapor canister.
A fuel system, comprising:
- a fuel tank storing fuel for an engine;
- a fuel vapor canister coupled to the fuel tank via a conduit;
- a hydrocarbon sensor positioned in the conduit between the fuel tank and the fuel vapor canister;
- and
- a controller storing non-transitory instructions to perform an action responsive to a fuel event indicated based on output from the hydrocarbon sensor.
2 more elements
A method for a fuel system coupled to an engine, the fuel system comprising a fuel tank and a fuel vapor canister, comprising:
- responsive to initiation of an engine-off fuel system leak detection test, measuring a hydrocarbon concentration of a vapor flow between the fuel tank and the fuel vapor canister with a hydrocarbon sensor;
- determining a rate of change in the hydrocarbon concentration;
- and
- in response to the rate of change in the hydrocarbon concentration being greater than a threshold rate, aborting the engine-off fuel system leak detection test.
1 more element
Dependencies are inferred from the claim text.