Fuel injection valve e.g. for direct injecting of fuel into combustion chamber of internal combustion engine, has body with valve seat surface cooperating to sealing seat with opening and lateral end of valve has protective layer

摘要

The valve has a body (4), with a valve seat surface (6) cooperating to a sealing seat with an opening (7). The lateral end of the valve has a protective layer (38). The protective layer is made from several layers laying on each other. One of the layers is made from glass, ceramic(s) and or metal such as aluminum.