Method for producing high-pressure fuel accumulators

Abstract

The invention relates to a method for producing a high pressure fuel accumulator ( 1 ) for a fuel injection system of an internal combustion engine, comprising a tubular base body ( 2 ), at least one connection for the fuel supply ( 3 ) and at least one connection for the fuel discharge, and at least one fixing element, said tubular base body ( 2 ) being embodied as a single component with the connections ( 3, 4 ) and the fixing element. The hollow profile of the tubular base body is extruded with the connector strips ( 5, 6 ) and the fixing strips ( 7 ).

1 - 3 . (canceled)  
   
   
       4 . A method of producing a high-pressure fuel accumulator for a fuel injection system of an internal combustion engine, the high-pressure fuel accumulator including: 
 a tubular base body, at least one fuel supply port for a fuel supply, at least one fuel discharge port for a fuel discharge, and at least one fixing element;    the method which comprises:    forming the tubular base body together with the fuel supply port, the fuel discharge port, and the fixing element as a one-piece integral component, and thereby profile-extruding the tubular base body with at least one connector strip and/or one fixing strip;    hardening a surface of the high-pressure fuel accumulator by cold working the one-piece integral component.    
   
   
       5 . The method for producing a high-pressure fuel accumulator according to  claim 4 , wherein the cold working step comprises redrawing a tube profile through a second extruding die slightly smaller than a first extruding die.  
   
   
       6 . The method for producing a high-pressure fuel accumulator according to  claim 4 , which further comprises performing at least one of the following two steps: 
 removing superfluous material from the connector strip and leaving individual connecting pieces in place;    removing superfluous material from the fixing strip and leaving individual fixing elements in place.