Fuel injection valve for internal combustion engines and a method for hardening the said valve

摘要

A fuel injection valve for internal combustion engines, having a valve body (1) and at least one injection opening (11) embodied in it, through which opening, controlled by a valve needle (5) that cooperates with a valve seat (9) embodied in the valve body (1), fuel can be injected into the combustion chamber of the engine. The valve body (1) comprises a high-alloy hot-work steel, which has been hardened by a case-hardening process (FIG. 1).