Feed device
AssigneeSiemens Aktiengesellschaft
InventorBernd Rumpf
Life of this patent
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Abstract
In a feed device (2) for a motor vehicle, a ventilation element (10) is arranged in a feed line (7) which is guided into an intermediate tank (8) arranged upstream of a surge chamber (3). The ventilation element (10) has an opening (11) which is closed when the fuel is flowing and is released if the flow fails. Drainage of the intermediate tank (8) by means of a siphon effect is therefore avoided.
Claims1
A feed device for a motor vehicle having a surge chamber which is provided for arrangement in a fuel tank, having a filling device for the surge chamber, having a sucking jet pump which is arranged outside the surge chamber and is intended for feeding fuel via a feed line into the surge chamber or into an intermediate tank connected to the surge chamber, and having a section of the feed line which is guided vertically downward into the intermediate tank or the surge chamber, wherein the feed device comprises a ventilation element (10) is arranged in the region of the highest point of the feed line (7) that extends between the sucking jet pump and the surge chamber, and wherein the ventilation element has an upwardly open pipe (19), and in that the pipe (19) is longer than a column of fuel which can be produced by the pressure of the sucking jet pump (6) when the fuel tank (1) is virtually empty.
Dependencies are inferred from the claim text.