Electric fuel pump unit - has pumped fuel serving as coolant for electric motor with pump and motor rigidly combined

摘要

The pump unit has an electric motor and a roller cell pump contained in a common cylindrical housing. The intermediate flange of the pump, facing towards the electric motor and the end cover for the pot-shaped cylindrical housing have facing annular grooves of the same dia. into which the enclosing tube for the stationary magnetic part of the electric motor fits, to form a rigid block. Pref. the cover is retained by an inwards projecting lip around the edge of the housing, with an intermediate seal around the periphery of the cover.