Dual Jet System

Abstract

Provided is a dual jet system mounted at a bottom end of a reservoir in a fuel pump module, and more particularly, to a fuel pump module mounted with a dual jet system capable of preventing a phenomenon that fuel is not smoothly filled in a reservoir due to fuel inclined to one side caused by an inclination of a fuel tank when a vehicle travels a steep slope section by mounting two jet pumps at both edges of a bottom end of a reservoir.

1 . A fuel pump module  1000  mounted in a fuel tank of a vehicle and supplying a predetermined amount of fuel filled therein to an engine, wherein a dual jet system   400  mounted on a bottom end of a reservoir  310  of the fuel pump module  1000  includes:
 a main jet pump housing  510  interconnected with at least one first jet orifice  520  and a cylindrical check valve sealing part  530  by a hollow communicating tube  550 , at least one first jet orifice  520  jetting the fuel into the reservoir  310  formed at one side of the dual jet system  400  so as to be protruded upward, the cylindrical hollow check valve sealing part  530  formed to be protruded upward while being adjacent to the first jet orifice  520  so that an anti siphon check valve assembly   580  preventing a siphon phenomenon and a reflow of fuel caused at the time of supplying the fuel to the reservoir   310  is inserted into the cylindrical check valve sealing part  530 ; 
 a sub-jet pump housing  610  provided with a second jet orifice  620  formed to be protruded upward in order to jet the fuel into the reservoir  310 , 
 wherein the bottom side of the reservoir  310  is provided with a coupling groove  800  corresponding to the top side of the dual jet system  400  so that the top surface of the dual jet system  400  is inserted into the bottom side of the reservoir  310  to be coupled with each other. 
 
     
     
         2 . The fuel pump module of  claim 1 , wherein the dual jet system  400  includes an outlet pipe  540  protrudedly formed at an outer circumferential surface of the check valve sealing part  530  and an inlet pipe  630  protrudedly formed at an outer circumferential surface of the sub-jet pump housing  610 , the outlet pipe  540  and the inlet pipe  630  being interconnected by a connection tube   700 . 
     
     
         3 . The fuel pump module of  claim 2 , wherein the main jet pump housing  510  is mounted to be adjacent to one edge of the bottom side of the reservoir  310  and the sub-jet pump housing  610  is mounted to be adjacent to the other edge of the bottom side of the reservoir  310 , the main jet pump housing  510  and the sub-jet pump housing   610  being mounted to be opposite to each other. 
     
     
         4 . The fuel pump module of  claim 1 , wherein the top side of the communicating tube  550  is provided with a first gap forming part  560  formed to be protruded upward. 
     
     
         5 . The fuel pump module of  claim 4 , wherein the main jet pump housing  510  is provided with a second gap forming part  570  so that the first gap forming part  560  extends in a width direction of the communicating tube   550 , the second gap forming part  570  being formed to be extended longer than the width of the main jet pump housing  510 . 
     
     
         6 . The fuel pump module of  claim 5 , wherein the sub-jet pump housing  610  is provided with a third gap forming part  640  protruded in a horizontal direction from one predetermined area and the other predetermined area of the outer peripheral surface thereof to extend in a direction opposite to each other, the third gap forming part  640  being formed to be extended longer than the width of the sub-jet pump housing  610 . 
     
     
         7 . The fuel pump module of  claim 6 , wherein both ends of the second gap forming part  570  and the third gap forming part  640  are provided with a protrusion part  571  protruded to the outside in a length direction and the predetermined area of the inner circumferential surface of the coupling groove  800  is provided with an insertion groove  810  corresponding to the protrusion part  571  so as to be fastened to the protrusion part  571 .