Pressure Regulator for a Fuel Supply Unit and Method for Production of a Pressure Regulator

Abstract

A pressure regulator for a fuel supply unit on a motor vehicle. A membrane is connected to an annular element of a housing and a moving piston by a laser welding technique. A reliable sealing of the membrane is thus guaranteed even at temperatures below 0° C. The region above the piston is thus reliably separated from the region below the piston.

1 . A pressure regulator for a fuel supply unit of a motor vehicle, with a valve for producing a joining of a connection to an outlet above a designated pressure in the connection, with a movable piston and with a membrane, which is held on a fixed annular element, for sealing the piston in relation to the annular element, characterized in that the membrane is welded to the annular element. 
     
     
         2 . The pressure regulator as claimed in  claim 1 , characterized in that the membrane is welded to the piston. 
     
     
         3 . The pressure regulator as claimed in  claim 1 , characterized in that the membrane has a recess for a valve seat arranged in the piston. 
     
     
         4 . The pressure regulator as claimed in  claim 1 , characterized in that the annular element, the membrane, and the piston are manufactured from plastic. 
     
     
         5 . The pressure regulator as claimed in  claim 4 , characterized in that the plastic of the membrane, the piston and the annular element is polyphenylene sulfide. 
     
     
         6 . The pressure regulator as claimed in  claim 4 , characterized in that the plastic has inserts of glass fibers. 
     
     
         7 . The pressure regulator as claimed in  claim 1 , characterized in that the membrane or the component to be welded to the membrane is manufactured from a material permeable to a laser beam and the respectively other component is manufactured from a material impermeable to a laser beam. 
     
     
         8 . The pressure regulator as claimed in  claim 1 , characterized in that the annular element is clamped in a housing in a sealing manner. 
     
     
         9 . A method for production of a pressure regulator for a fuel supply unit of a motor vehicle, in which a piston of a valve is joined to a fixed annular element in a sealing manner via a membrane, characterized in that the membrane is welded to the annular element. 
     
     
         10 . The method as claimed in  claim 9 , characterized in that the welding takes place by a laser welding technique. 
     
     
         11 . A pressure regulator for a fuel supply unit of a motor vehicle, comprising:
 a fixed annular element;   a housing including:
 a first housing portion; and 
 a second housing portion, the second housing portion being attached to the first housing portion, the housing configured to retain the annular ring between the first and second housing portions; 
   an inlet on the housing;   an outlet on the housing;   a valve for producing connection between the inlet and outlet above a designated pressure in the inlet;   a movable piston arranged in one of the first and second housing portions; and   a membrane that is welded to the fixed annular element and configured to seal the piston in relation to the annular element.   
     
     
         12 . The pressure regulator as claimed in  claim 11 , wherein the membrane is welded to the moveable piston. 
     
     
         13 . The pressure regulator as claimed in  claim 11 , wherein the membrane has a recess for a valve seat arranged in the piston. 
     
     
         14 . The pressure regulator as claimed in  claim 11 , wherein the annular element, the membrane, and the piston are manufactured from plastic. 
     
     
         15 . The pressure regulator as claimed in  claim 14 , wherein the plastic of the membrane, the piston and the annular element is polyphenylene sulfide. 
     
     
         16 . The pressure regulator as claimed in  claim 14 , wherein the plastic has inserts of glass fibers. 
     
     
         17 . The pressure regulator as claimed in  claim 11 , wherein the annular element is sealing clamped with respect to at least one of the first and second housing portions.