Fuel delivery unit has blade rim on only one side of impeller wheel opposite side channel with inlet and outlet on same side of wheel with recesses on other side connected to blade chambers

摘要

The unit has a side channel delivery pump with a pump chamber and impeller wheel driven by a brushless electric motor. At least one pump stage has a rim of blades on only one side of the impeller wheel opposite a side channel (26) with its inlet and outlet (30) on the same side of the wheel, which has recesses (34) on the other side connected to the blade chambers by openings in the wheel.