Pump Device For Feeding Fuel In A Fuel Tank

Abstract

A pump device for feeding fuel in a fuel tank of a motor vehicle, having a suction jet pump and having a control valve for regulating the feed rate of the suction jet pump, A valve body can be moved counter to the flow direction of a fuel jet of the suction jet pump to throttle the feed rate. In this way, forces for opening the control valve are kept low. A float controls the valve body via a shaft which is guided through a mixing tube of the suction jet pump.

1 .- 10 . (canceled) 
     
     
         11 . A pump device for feeding fuel in a fuel tank of a motor vehicle, comprising:
 a suction jet pump, comprising:
 a mixing tube 
 a nozzle arranged upstream of the mixing tube; 
 an intake region of the suction jet pump arranged between the nozzle and the mixing tube; 
 a control valve for controlling a feed rate of the suction jet pump comprising a control valve body configured to control a flow of a propellant jet through the nozzle, the valve body configured to move in a direction toward an end of the nozzle that faces the mixing tube to throttle the feed rate of the suction jet pump. 
   
     
     
         12 . The pump device as claimed in  claim 11 , wherein the direction of movement of the valve body to throttle the flow of the propellant jet is counter to a direction of flow of the propellant jet. 
     
     
         13 . The pump device as claimed in  claim 12 , further comprising a shaft guided through the mixing tube on which the valve body is arranged. 
     
     
         14 . The pump device as claimed in  claim 13 , wherein the valve body is of conical configuration that tapers toward an end of the nozzle that faces the mixing tube. 
     
     
         15 . The pump device as claimed in  claim 14 , wherein the end of the nozzle that faces the mixing tube comprises a valve seat configured to mate with the valve body. 
     
     
         16 . The pump device as claimed in  claim 15 , wherein the shaft is coupled to a float to activate the control valve. 
     
     
         17 . The pump device as claimed in  claim 16 , further comprising:
 a wall arranged between the float for controlling the control valve and the free end of the mixing tube,   wherein the float is fastened directly to the shaft.   
     
     
         18 . The pump device as claimed in  claim 17 , wherein the mixing tube is guided into a liquid trap, the wall separating the float from the mixing tube is part of the liquid trap. 
     
     
         19 . The pump device as claimed in  claim 18 , wherein the suction jet pump is arranged within a surge pot designed to collect fuel. 
     
     
         20 . The pump device as claimed in  claim 19 , wherein the liquid trap is configured as one of a pocket in a side wall of the surge pot and in a cover of the surge pot. 
     
     
         21 . The pump device as claimed in  claim 11 , further comprising a shaft guided through the mixing tube on which the valve body is arranged. 
     
     
         22 . The pump device as claimed in  claim 11 , wherein the valve body is of conical configuration, tapering toward the end of the nozzle that faces the mixing tube. 
     
     
         23 . The pump device as claimed in  claim 11 , wherein the end of the nozzle that faces the mixing tube comprises a valve seat configured to mate with the valve body. 
     
     
         24 . The pump device as claimed in  claim 13 , wherein the shaft is coupled to a float for activating the control valve. 
     
     
         25 . The pump device as claimed in  claim 11 , wherein the suction jet pump is arranged within a surge pot configured to collect fuel. 
     
     
         30 . The pump device as claimed in  claim 18 , wherein the liquid trap is configured as one of a pocket in a side wall of the surge pot and in a cover of the surge pot.