FUEL RAIL ASSEMBLY AND METHOD FOR ASSEMBLING A FUEL RAIL ASSEMBLY

摘要

The invention refers to a method for assembling a fuel rail assembly (1), comprising the steps: providing a fuel rail (2) and a component (3) which is to be coupled to the fuel rail (2), wherein the fuel rail (2) has a casing (5) which borders an inner cavity and which has a first via hole (11) and wherein the component (3) has a housing (9) which borders an inner space and which has a second via hole (12), and coupling the housing to the casing (5) so that the space is in fluid communication with the inner cavity by a hollow passage. In order to improve the method the invention suggests that the first via hole (11) has a circular hollow cross section which is surrounded by a wall region (15) of the casing (5), the second via hole (12) has a circular hollow cross section which is surrounded by a cylindrical wall section (16) of the housing, and coupling of the housing to the casing (5) so that the space is in fluid communication with the inner cavity by a hollow passage comprises the steps: inserting the cylindrical wall section (16) into the first via hole (11), providing an expander bush (4) which has a convex outer surface of revolution with regard to a geometric rotational axis (18) and which has a third via hole extending along the geometric rotational axis (18), wherein the convex outer surface of revolution has a maximum diameter which is bigger compared to a diameter of the circular hollow cross section of the second via hole (12), pressing the expander bush (4) in the second via hole (12) so that the hollow passage extends through the third via hole, so that the cylindrical wall section (16) is expanded in a radial direction by the convex outer surface of revolution and so that the expander bush (4) is fixed by a press-fit within the second via hole (12), wherein the radial expansion of the cylindrical wall section (16) causes a mechanical coupling of the cylindrical wall section (16) to the casing (5) at a lateral wall section (26) of the first via hole (11). Further, the invention also relates to a fuel rail assembly (1).