Back to results
US 11,698,036 B2Granted
Method and system for operating a refueling valve
AssigneeFord Global Technologies, LLC
InventorsAed Dudar, Dennis S. Yang, Jeevagan Natarajan
Life of this patent
Estimating the term…
Abstract
Methods and systems are presented for operating a refueling valve of an evaporative emissions system. The methods and systems may attempt to reactivate a refueling valve that has stuck due to the refueling valve being exposed to liquid fuel. In one example, a voltage that is applied to the refueling valve may be increased to reactivate the refueling valve.
Claims16
A vehicle system, comprising:
- a vehicle including an internal combustion engine, a fuel tank, a carbon filled canister, and a refueling valve in fluidic communication with the carbon filed canister and the fuel tank;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to supply a voltage to the refueling valve that causes a fuel in the refueling valve to heat and then vaporize, and additional instructions to start the internal combustion engine in response to the refueling valve being stuck open.
A method for operating an evaporative emissions system, comprising:
- supplying a voltage generated via an alternator for a first duration to a stuck refueling valve;
- supplying the voltage generated via the alternator for a second duration to the stuck refueling valve after supplying the voltage generated via the alternator for the first duration and before the stuck refueling valve is unstuck, the second duration longer than the first duration;
- and
- heating and then vaporizing a fuel in the stuck refueling valve via the voltage generated via the alternator for the second duration;
- where the refueling valve is in fluidic communication with a carbon filed canister and a fuel tank.
2 more elements
A method for operating an evaporative emissions system for an internal combustion, comprising:
- applying a voltage to a refueling valve via a controller in response to a pressure in a conduit, the refueling valve positioned along a conduit extending from a recirculation tube to a conduit that is coupled to a carbon filled canister;
- and
- starting the internal combustion engine in response to the refueling valve being stuck open;
- where the recirculation tube is in fluidic communication with a fuel tank and a fuel tank inlet;
- and
- where a duration of the application of the voltage to the refueling valve causes a fuel within the valve to heat and then vaporize.
3 more elements
Dependencies are inferred from the claim text.