Fuel pumping unit

The invention relates to a fuel pump unit (10) for injecting a fuel (12) into a combustion chamber of an internal combustion engine, with a pump (16) that can be actuated by a pump drive (14), which conveys the fuel (12) as a first injection liquid from a first low-pressure connection (18) to a first high-pressure connection (20), wherein the pump (16) is coupled with a displacement unit (38) and via the displacement unit (38) can convey a second injection liquid (40) from a second low-pressure connection (42) to a second high-pressure connection (44).