Assembly for feeding fuel out of a supply tank to an internal combustion engine

US5601422A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Juergen Treiber · Munich, DE
• Hartmuth Kraemer · Ditzingen, DE
• Thomas Wuensch · Ludwigsburg, DE
• Stefan Woerz · Lambach, DE
• Willi Strohl · Beilstein, DE

Key dates

• Filing date: Oct 19, 1995
• Grant date: Feb 11, 1997
• Expiry date: Oct 19, 2015

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C11/008
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel feed assembly with a feed pump of the roller-cell pump type, of which the pump rotor rotates eccentrically in a pumping chamber has a plurality of rollers which are guided in radial grooves of the disk-shaped pump rotor and are distributed uniformly over the circumference. When the pump rotor is rotating, the rollers run, as a result of the centrifugal force, on a bore wall of an intermediate ring radially delimiting the pumping chamber. The bore wall forms a running track. At the same time, the rollers delimit individual sickle-shaped pump rotor and the bore wall and the volume decreases from a suction port towards a delivery port as a result of the eccentricity of the pump rotor. At the same time, there is provided between the delivery port and suction port in the direction of rotation of the pump rotor a narrow-gap region which, according to the invention, is made so large that the pump working spaces passing through this region are closed completely.