Pump for supplying fuel from tank to engine

The pump chamber (33) is formed by the bore (27) of a ring (29), a base plate (13), a cover plate (31) and the pump rotor (23) which is mounted eccentrically in the bore. A number of rollers (41), which are guided in cut-outs (39) in the rotor, lie under centrifugal force against the bore and enclose the pump working chamber (43). A narrow gap (47) is formed between the wall of the bore and the OD of the pump rotor. The edges of the working chamber of the pump control the suction opening (35) only then when the outlet opening has been fully closed. The narrow gap is laid out so that at any time a roller is in this area which contributes to sealing between the two sides of the gap.

Pump

A pump is proposed which is used for pumping a medium, especially for pumping fuel from a reservoir to an internal combustion engine. The pump has a rotor which has a plurality of partition elements, which can slide in at least approximately radial slits, open at the edge, of the cylindrical rotor and which, as the rotor rotates, bear on a race surrounding the rotor. The race in its course, together with the rotor shell, forms gaps of variable width. The race is formed at an opening in a pump component fixed to the mount. Both mouths of the opening are covered, in the region of the rotor shell, by plate-shaped components, one component of which having a suction orifice and the other component having a discharge orifice. So that a higher discharge pressure can be obtained than that achievable with the known feed pumps, the rotor shell, together with the race, forms two narrowest gaps and widest gaps each, positioned opposite one another with respect to the rotational axis, and the component ...

Aggregat zum Fördern von Kraftstoff aus einem Vorratstank zur Brennkraftmaschine eines Kraftfahrzeugs