High pressure component system e.g. fuel injector, for diesel fuel self-ignition engine, has contact surfaces provided with groove structure with small roughness depth, and sealing material arranged between contact surfaces

摘要

The system has a housing comprising two high pressure bodies (5) that are indirectly connected together by contact surfaces (8) and pressed against each other by a tensioning arrangement. A central low pressure channel (6) is arranged in the high pressure bodies to feed mediums under high pressure, where the channel passes through the contact surfaces of the high pressure bodies. The contact surfaces are provided with a groove structure with small roughness depth, where the groove structure is formed in concentric or helical shape. A sealing material is arranged between the contact surfaces. The medium is a fuel i.e. diesel fuel.