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US 2025/0104489 A1Published application
Systems and methods for reducing saddle fuel tank depressurization time
AssigneeFord Global Technologies, LLC
InventorAed Dudar
Life of this patent
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Abstract
Methods and systems are provided for diagnosing valves of a fuel system. In one example, the fuel system is configured to reduce a depressurization time of one or more fuel tanks arranged therein. A method for diagnosing the valves includes monitoring a number of pre-mature shut-off events during a refueling event to determine if the valves are degraded.
Claims20
A method, comprising:
- diagnosing a valve arranged in a conduit fluidly coupling a primary fuel tank and a secondary fuel tank during a refueling event or following the refueling event.
A system, comprising:
- an engine;
- a fuel system coupled to the engine, the fuel system comprising a primary fuel tank, a secondary fuel tank, and a canister;
- wherein
- the primary fuel tank is fluidly coupled to the secondary fuel tank via a conduit, and wherein the secondary fuel tank is fluidly coupled to the canister via a load conduit, the conduit comprising a first valve and the load conduit comprising a second valve;
- and
- a controller with computer-readable instructions stored on memory that when executed cause the controller to:
- diagnose a first condition of one or more of the first valve and the second valve during a refueling event;
- and
- diagnose a second condition of one or more of the first valve and the second valve based on a canister load.
6 more elements
A method for a fuel system comprising a first fuel tank and a second fuel tank, the method, comprising:
- diagnosing a first condition of one or more of a first valve and a second valve during a refueling event based on a number of pre-mature refueling shut-offs and feedback from a fuel-tank-pressure-transducer (FTPT);
- and
- diagnosing a second condition of one or more of the first valve and the second valve based on a load of a canister;
- wherein
- the first valve is arranged in a conduit fluidly coupling the first fuel tank to the second fuel tank, and wherein the second valve is arranged in a load conduit fluidly coupling the second fuel tank to the canister.
2 more elements
Dependencies are inferred from the claim text.