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US 12,221,935 B2Granted
Systems and methods for purging air intake system hydrocarbon trap of hybrid vehicle
AssigneeFord Global Technologies, LLC
InventorAed Dudar
Life of this patent
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Abstract
Methods and systems are provided for deep purging of fuel vapors of an air intake system hydrocarbon trap. The purging may comprise supplying heated air to the air intake system hydrocarbon trap via a carbon filled fuel vapor storage canister that includes an integral heater. The heated air operates to liberate heavier hydrocarbons from the air intake system hydrocarbon trap.
Claims16
A method for an engine, comprising:
- anticipating starting of the engine;
- activating a heater of a carbon filled fuel vapor storage canister in response to anticipating starting of the engine;
- estimating an amount of hydrocarbons stored in an air intake system hydrocarbon trap exceeds a first threshold amount of hydrocarbons;
- and
- purging hydrocarbons stored in the carbon filled fuel vapor storage canister prior to activating the heater such that less than a second threshold amount of hydrocarbons is stored in the carbon filled fuel vapor storage canister.
2 more elements
A system for a vehicle, comprising:
- an internal combustion engine including an air intake system;
- a carbon filled fuel vapor storage canister including a heater;
- an air intake system hydrocarbon trap positioned within the air intake system;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to activate the heater to heat air flowing through the carbon filled fuel vapor storage canister to the air intake system hydrocarbon trap and purge the carbon filled fuel vapor storage canister such that carbon filled fuel vapor storage canister is purged of hydrocarbons before activating the heater.
2 more elements
A method for an engine, comprising:
- flowing heated air from a carbon filled fuel vapor storage canister to an air intake system hydrocarbon trap, where the heated air is heated via a heater installed in the carbon filled fuel vapor storage canister, where the heater is activated before the engine starting when the engine is not rotating.
Dependencies are inferred from the claim text.