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US 2015/0090233 A1Published application
Hybrid vehicle fuel vapor canister
AssigneeFord Global Technologies, LLC
InventorsAed M. Dudar, Dennis Seung-Man Yang
Life of this patent
Estimating the term…
Abstract
Embodiments for controlling fuel vapors are provided. In one example, a method comprises initiating a purge of a fuel vapor canister responsive to a temperature profile at a vent side of the fuel vapor canister. In this way, release of fuel vapors to the atmosphere may be reduced.
Claims20
A method, comprising:
- initiating a purge of a fuel vapor canister responsive to a temperature profile at a vent side of the fuel vapor canister.
A hybrid vehicle system, comprising:
- an engine configured to receive fuel from a fuel tank for combustion;
- a fuel vapor canister configured to trap fuel vapor released from the fuel tank;
- a vent line coupling the fuel vapor canister to atmosphere;
- a purge line coupling the fuel vapor canister to the engine;
- a temperature sensor positioned in the fuel vapor canister near a vent port coupling the fuel vapor canister to the vent line;
- and
- a controller storing instructions for:
- detecting bleed-through of fuel vapor out of the fuel vapor canister based on output of the temperature sensor;
- and
- if bleed-through is detected,
- opening a canister purge valve positioned in the purge line to route the trapped fuel vapor to the engine;
- and
- if the hybrid vehicle is currently propelled by a motor and not the engine, starting the engine prior to opening the canister purge valve.
10 more elements
A method for managing fuel vapors in a hybrid vehicle configured to be propelled by a motor or by an engine, the method comprising:
- during non-purge conditions while the engine is inactive, detecting fuel vapors exiting a fuel vapor canister to atmosphere based on a temperature of an atmosphere side of the fuel vapor canister reaching a peak temperature;
- and
- if fuel vapor exiting the fuel vapor canister is detected, starting the engine and opening a canister purge valve to route fuel vapor in the fuel vapor canister to the engine for combustion.
Dependencies are inferred from the claim text.