Fuel injection nozzle for internal combustion engines

摘要

The intended object of the invention is to achieve a graduated pre-injection and main injection in an injection nozzle of the generic type without modifying a standard design of the valve assembly (10-18). To this end, it is proposed to support a control piston (50), acted upon by the fuel, upstream of the valve assembly (10-18) so that it is capable of displacement in or on a housing part (30, 38) and to provide it with ports (70, 72, 74), which with ports (42) fixed to the housing each control a passage for the pre-injection and the main injection quantity. Injection nozzles for internal combustion engines with self-ignition are the preferred sphere of application. <IMAGE>