Fuel supply unit

Abstract

In a fuel feed unit ( 2 ) a bleed valve ( 9 ) is connected to a region which is constantly filled with fuel. This means that gases pass out of the fuel feed unit ( 2 ) through the bleed valve ( 9 ). However, penetration of gases when the fuel feed unit ( 2 ) is not operating, via leaks in the bleed valve ( 9 ), is reliably avoided.

1 . Fuel feed unit, having a fuel pump, which is provided for the purpose of feeding fuel out of a suction region into a delivery region, and having a bleed valve for sealing the delivery region or connecting the delivery region to the environment, characterized in that that end of the bleed valve ( 9 ) which faces the environment is connected to a region which is constantly filled with fuel in the assembled state of the fuel feed unit ( 2 ).  
     
     
         2 . Fuel feed unit according to  claim 1 , characterized in that a line ( 10 ) is connected to that end of the bleed valve ( 9 ) which faces toward the environment, and in that the line ( 10 ) leads to close to the suction region.  
     
     
         3 . Fuel feed unit according to  claim 1  or  2 , characterized in that the volume of the line ( 10 ) is particularly small compared to the volume of the delivery region ( 7 ).  
     
     
         4 . Fuel feed unit according to at least one of the preceding claims, characterized in that the line ( 10 ) is bent in a U shape.  
     
     
         5 . Fuel feed unit according to at least one of the preceding claims, characterized in that the free end of the line ( 10 ), when the fuel feed unit ( 2 ) has been mounted in a splash pot ( 1 ), is at a predetermined distance from the bottom of the splash pot ( 1 ).