Variable coolant pump

US8608452B2 · kind B2 · utility

Assignee

• Schaeffler Technologies AG & Co. KG · DE

Inventors

• Alexander Draheim · Erlangen, DE
• Andreas Nendel · Prüm, DE
• Eduard Golovatai-Schmidt · Hemhofen, DE
• Jens Schaefer · Herzogenaurach, DE
• Sandra Schaefer · Edenkoben, DE

Key dates

• Filing date: Aug 10, 2009
• Grant date: Dec 17, 2013
• Expiry date: May 9, 2030

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2270/62
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A variable coolant pump for a cooling circuit of an internal combustion engine that has a pump housing in which is mounted a hollow shaft that is driveable by a pulley. At one end of the hollow shaft an impeller is fastened which has vanes projecting into an inlet chamber and which is firmly connected via axial bridges to a cover disc. Through rotation of the impeller together with the cover disc, water can be sucked into the inlet chamber via an inlet connection piece of the pump housing and conveyed by the vanes into an annular passage of the pump housing. A guide disc with a contour corresponding to the impeller is further arranged between impeller and cover disc. The guide disc is guided by the axial bridges and can be displaced axially via a positioning unit by a piston located inside the hollow shaft.