Fuel tank venting system with liquid collection and active purging
AssigneeGM Global Technology Operations LLC
InventorsJason M. Andrzejewski, Timothy E. McCarthy, Marvin H. Miller, Clifford A. Lyons
Life of this patent
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Abstract
A fuel tank system includes a fuel tank and a fuel pump assembly arranged in the fuel tank and including a fuel pump and a vacuum source. A fuel tank venting system includes a first vent valve arranged in the fuel tank. A storage vessel is arranged in the fuel tank and in fluid communication with the first vent valve. A first fluid line arranged in the fuel tank connecting the storage vessel to the vacuum source of the fuel pump assembly. A second fluid line connects the storage vessel to an evaporative emission system.
Claims20
A fuel tank system, comprising:
- a fuel tank;
- a fuel pump assembly arranged in the fuel tank and including a fuel pump and a vacuum source;
- and
- a fuel tank venting system including:
- a first vent valve arranged in the fuel tank;
- a storage vessel arranged in the fuel tank and in fluid communication with the first vent valve;
- a first fluid line arranged in the fuel tank connecting the storage vessel to the vacuum source of the fuel pump assembly;
- and
- a second fluid line connecting the storage vessel to an evaporative emission system,
- wherein the fuel tank system further comprises a fuel filter connected between the storage vessel and the vacuum source.
A fuel tank venting system, comprising:
- a first vent valve arranged in a fuel tank;
- a second vent valve arranged in the fuel tank;
- a storage vessel arranged in the fuel tank and connected in series to the first vent valve and the second vent valve;
- a first fluid line connecting the storage vessel to a vacuum source of a fuel pump assembly;
- and
- a second fluid line connecting the storage vessel to an evaporative emission system.
A fuel tank venting system, comprising:
- a first vent valve arranged in a fuel tank;
- a second vent valve arranged in the fuel tank;
- a storage vessel arranged in the fuel tank and connected in one of series and parallel to the first vent valve and the second vent valve;
- a first fluid line connecting the storage vessel to a vacuum source of a fuel pump assembly;
- a one-way check valve connected between the first vent valve and the storage vessel;
- and
- a second fluid line connecting the storage vessel to an evaporative emission system.
Dependencies are inferred from the claim text.