Fuel delivery unit for vehicular internal combustion engine - has two pumps directly coupled by dovetail projections from hub into notched pinion without intermediate follower

摘要

The unit (12) fitted into the fuel tank (10) has a tubular housing (18) contg. an electric motor driven butterfly-wheel pump (34) in a chamber (40) with an annular duct (44), and an internal toothed wheel pump (36) driven by the pinion (60). The two pumps (34,36) are interconnected by projections from the hub (66) of the plastic rotor (38) of the first pump, which extend through an opening in the intermediate wall (52) into notches within the pinion (60) in mesh with the internal teeth (58) of the second pump. ADVANTAGE - Elimination of separate follower renders installation simpler, more easily assembled.