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US 12,535,043 B2Granted
Systems and methods for capless refueling system
AssigneeFord Global Technologies, LLC
InventorAed Dudar
Life of this patent
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Abstract
Methods and systems are provided for capless refueling system of a vehicle. In one example, a method may include diagnosing a door seal of a capless unit of the capless refueling system. The diagnosing includes determining a condition of the door seal in response to a leak being present in an evaporative emissions system.
Claims17
A method comprising:
- diagnosing a door seal of a capless unit of a capless refueling system by generating vacuum in the capless refueling system;
- and
- determining the door seal passes in response to only one inflection point being sensed during the diagnosing, wherein the only one inflection point is based on a pressure of the capless refueling system sensed by a fuel tank pressure transducer (FTPT).
A capless refueling system for a vehicle, comprising:
- a capless unit having flappers and configured to receive a nozzle of a fuel dispensing device;
- and
- a controller comprising computer-readable instructions that when executed enable the controller to:
- detect a presence of a leak in an evaporative emissions system of the vehicle, wherein the evaporative emissions system comprises a fuel tank pressure transducer (FTPT) configured to sense a pressure of the evaporative emissions system;
- and
- perform a diagnostic of a door seal of the capless unit via generating vacuum in the capless unit, wherein the door seal does not pass the diagnostic in response to a plurality of pressure inflection points being sensed during the diagnostic.
3 more elements
A method, comprising:
- responsive to a leak detected in an evaporative emissions system of an engine;
- sealing the evaporative emissions system from atmosphere;
- generating vacuum in the evaporative emissions system and a capless refueling system comprising a capless unit;
- monitoring a pressure of the evaporative emissions system;
- and
- determining a condition of a door seal of the capless unit based on a number of pressure inflection points detected.
3 more elements
Dependencies are inferred from the claim text.