Method of controlling operational venting of a plastics fuel tank and plastics fuel tank
AssigneeKautex Textron GmbH & Co. KG
InventorKlaus Gebert
Life of this patent
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Abstract
The invention relates to a method of controlling operational venting of a plastics fuel tank, in which the volume of the plastics fuel tank is kept within a predetermined differential pressure range relative to ambient pressure by means of at least one operational venting valve with pressure maintaining function, at least an upper limit of the differential pressure range defining a maximum admissible overpressure being varied as a function of the ambient temperature.
Claims11
Method of controlling operational venting of a plastics fuel tank, in which the volume of the plastics fuel tank is kept within a predetermined differential pressure range relative to ambient pressure by means of at least one operational venting valve with pressure maintaining function, at least an upper limit of the differential pressure range defining a maximum admissible overpressure being varied as a function of the ambient temperature.
Plastics fuel tank for motor vehicles with means for inward and outward venting during fuel discharge (operational venting), having at least one operational venting valve between at least one operational venting point and a fuel vapor filter, the operational venting valve taking the form of a pressure maintaining valve, characterized in that the operational venting valve has an ambient temperature-dependent switching characteristic.
Dependencies are inferred from the claim text.