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US 2015/0090232 A1Published application
Hybrid vehicle fuel vapor canister
AssigneeFord Global Technologies, LLC
InventorsMark W. Peters, Mark Daniel Bunge, Michael G. Heim, Russell Randall Pearce
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Abstract
Embodiments for controlling fuel vapors are disclosed. In one example, a method comprises during a purge of a fuel vapor canister, adjusting a heater of the fuel vapor canister based on a rate of a purge flow exiting the fuel vapor canister and a concentration of hydrocarbons released from the fuel vapor canister. In this way, a fuel vapor canister purge efficiency may be increased.
Claims19
A method comprising:
- during a purge of a fuel vapor canister, adjusting a heater of the fuel vapor canister based on a rate of a purge flow exiting the fuel vapor canister and a concentration of hydrocarbons released from the fuel vapor canister.
A vehicle system, comprising:
- an engine configured to receive fuel from a fuel tank for combustion;
- a fuel vapor canister configured to trap hydrocarbons in fuel vapor from the fuel tank;
- a purge line coupling the fuel vapor canister to the engine, the purge line including a canister purge valve and a sensor;
- a heater positioned in the fuel vapor canister;
- and
- a controller storing instructions for:
- opening the canister purge valve to initiate a purge of hydrocarbons from the fuel vapor canister to the engine;
- and
- after the purge is initiated, activating the heater once output from the sensor indicates a concentration of hydrocarbons released from the fuel vapor canister has reached an upper threshold level.
6 more elements
A method, comprising:
- responsive to a load on a fuel vapor canister exceeding a threshold load, opening a canister purge valve to purge stored hydrocarbons from the fuel vapor canister to an engine;
- and
- after the purge is initiated, activating a heater of the fuel vapor canister once a concentration of hydrocarbons released from the fuel vapor canister reaches an upper threshold level.
Dependencies are inferred from the claim text.