Injector with subdivided pressure multiplier

An injector for injection a fuel under high pressure into a combustion chamber of an internal combustion engine, the injector comprising an injector housing;

• a control chamber;
• a primary-side inlet to said control chamber a control valve which controls said primary-side inlet to said control chamber, a pressure multiplier movable in said injector housing, said pressure multiplier being formed as a two-part piston arrangement, said piston arrangement having an outer piston and an inner piston inserted in said outer piston, said outer piston and said inner piston being axially pretensioned relative to one another;
• and means for axially pretensioning said outer piston and said inner piston relative to one another.