The present application relates to a pump unit (1) for a fuel injection system. The pump unit (1) has a low pressure fuel supply line (11) and a high pressure fuel outlet (13). A pumping chamber (5) having a plunger (15) is operable to perform a pumping cy...

A fuel injector (1) for a compression ignition internal combustion engine which comprises a fuel injection valve having an injection valve member (5) which is moveable in use, under the influence of fuel pressure within an injection valve member control ch...