Flow pump for feeding fuel from a supply container to internal combustion engine of a motor vehicle

US5807068A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Klaus Dobler · Gerlingen, DE
• Michael Huebel · Gerlingen, DE
• Willi Strohl · Beilstein, DE
• Jochen Rose · Hemmingen, DE
• Bernhard Blaettel · Holzgerlingen, DE

Key dates

• Filing date: Aug 21, 1996
• Grant date: Sep 15, 1998
• Expiry date: Aug 21, 2016

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04D29/188
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The flow pump has an impeller (22), revolving in a pump chamber, which on each of its two axially oriented face ends (28, 29), has one ring of vanes (30) between which interstices (31) are located, and which cooperates with a feed channel (34) associated with the vanes (30) for pumping the fuel. When viewed in the radial direction relative to the rotary axis (24) of the impeller (22), the vanes (30) are positioned obliquely with respect to the rotary axis (24) in such a way that they lead ahead in the circumferential direction (21) of the impeller (22) toward the face end (28, 29) of the impeller (22). The vanes (30) and the rotary axis (24) of the impeller (22) form an angle (.alpha.) of between 25.degree. and 70.degree. that is oriented in the circumferential direction (21) of the impeller (22). Because of this obliquely positioned arrangement of the vanes (30), an improved inflow of the pumped fuel into the interstices (31) between the vanes (30) is effected, compared with an arrangement of vanes (30) that is parallel to the rotary axis (24), and as a result an increased feed pressure and improved efficiency of the flow pump are attained.