Pressure regulating apparatus

Claim 1

A pressure regulating apparatus positioned on and connected to a rigid fuel distributor line for supplying fuel to fuel injection valves of a fuel injection system for internal combustion engines, said pressure regulating apparatus comprising a holder bushing including an upwardly extending wall and positioned on and secured to one side of said rigid fuel distributor line, a pressure regulating valve, said pressure regulating valve including a valve housing, said valve housing including a bottom part placed in a guide bore in said holder bushing and a cap, said pressure regulating valve having a resilient wall secured between said bottom part of said housing and said cap that divides a spring chamber from a fuel chamber in said valve housing, a valve carried by said resilient wall, an outlet fitting in said fuel distribution line secured to a bottom wall of said distributor line, a valve seat body which protrudes from said valve housing into said outlet fitting in said fuel distribution line, a valve seat on said valve seat body which cooperates with said valve, at least one inlet conduit in said bottom part of said holder bushing which communicates between said fuel chamber and said fuel distributor line, an outlet conduit which leads from said valve seat to a fuel return line via said valve seat body and said outlet fitting, said holder bushing (3) completely surrounds a portion of said valve housing bottom part (19) of said pressure regulating valve (8) and encompasses said at least one inlet conduit in an axial direction in an area leading away from said fuel distributor line (1), and an elastic seal (43) is disposed between said valve housing part (19) and said holder bushing (3).