Vapor impermeable solenoid for fuel vapor environment
AssigneeEaton Corporation
InventorRobert Andrew Dayton
Life of this patent
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Abstract
A vapor impermeable solenoid includes an outer housing fabricated from a vapor impermeable material configured to prevent fuel vapor molecules from passing therethrough; windings configured to generate a magnetic flux when energized, a flux collector configured to direct the magnetic flux, a pole piece, and a magnetic armature disposed within the housing and coupled to a seal configured to selectively seal a passage that allows fuel vapor to pass to a purge canister. The magnetic armature is configured to move from a first position to a second position when an electric current is applied to the windings.
Claims20
A vapor impermeable solenoid for a fuel tank isolation valve assembly, the vapor impermeable solenoid comprising:
- an outer housing defining an inner cavity and fabricated from a vapor impermeable material configured to prevent fuel vapor molecules from passing therethrough;
- windings configured to generate a magnetic flux when energized;
- a flux collector configured to direct the magnetic flux;
- an armature tube disposed within the inner cavity inboard of the flux collector and formed of magnetic material;
- a pole piece disposed within the armature tube;
- and
- a magnetic armature disposed within the armature tube and coupled to a seal configured to selectively seal a passage that allows fuel vapor to pass to a purge canister, the magnetic armature configured to move from a first position to a second position when an electric current is applied to the windings.
A fuel tank isolation valve assembly for a fuel tank system having a fuel tank coupled to a purge canister via a fuel vapor vent line, the fuel tank isolation valve assembly comprising:
- a vent passage having a vapor inlet port and a vapor outlet port;
- and
- a vapor impermeable solenoid assembly operably coupled to the vent passage, the vapor impermeable solenoid assembly comprising:
- an outer housing defining an inner cavity and fabricated from a vapor impermeable material configured to prevent fuel vapor molecules from passing therethrough;
- windings configured to generate a magnetic flux when energized;
- a flux collector configured to direct the magnetic flux;
- an armature tube disposed within the inner cavity inboard of the flux collector and formed of magnetic material;
- a pole piece disposed within the armature tube;
- and
- a magnetic armature disposed within the armature tube and coupled to a seal configured to selectively seal the vent passage that allows fuel vapor to pass to purge canister, the magnetic armature configured to move from a first position to a second position when an electric current is applied to the windings.
A vehicle fuel tank system comprising:
- a fuel tank;
- a purge canister;
- a conduit fluidly coupling the fuel tank and the purge canister;
- and
- a fuel tank isolation valve assembly disposed within the conduit and configured to selectively fluidly isolate the fuel tank from the purge canister, the fuel tank isolation valve assembly comprising:
- a vent passage having a vapor inlet port and a vapor outlet port;
- and
- a vapor impermeable solenoid assembly operably coupled to the vent passage, the vapor impermeable solenoid assembly comprising:
- an outer housing defining an inner cavity and fabricated from a vapor impermeable material configured to prevent fuel vapor molecules from passing therethrough;
- windings configured to generate a magnetic flux when energized;
- a flux collector configured to direct the magnetic flux;
- an armature tube disposed within the inner cavity inboard of the flux collector and formed of magnetic material;
- a pole piece disposed within the armature tube;
- and
- a magnetic armature disposed within the armature tube and coupled to a seal configured to selectively seal the vent passage that allows fuel vapor to pass to the purge canister, the magnetic armature configured to move from a first position to a second position when an electric current is applied to the windings.
Dependencies are inferred from the claim text.