Fuel inlet valve and cylinder head for housing a fuel inlet valve

A fuel inlet valve (150) to be used in a double-walled fuel supply pipe system (100) is disclosed. Fuel inlet valves are fuel controlling components and have to be monitored with respect to a possible fuel leakage. The disclosed fuel inlet valve (150) may comprise a barrier element (170) which may be arranged in a housing through hole (153) in a wall of a valve housing (151). The barrier element (170) may comprise a leakage detection space (173) between a first inner barrier wall (171) and a second outer barrier wall (172) and a first valve leakage detection opening (152) integrated in the wall of the housing (151) and fluidly connecting the leakage detection space (173) with an outside of the fuel inlet valve (150).