Coolant pump for an internal combustion engine

US10731654B2 · kind B2 · utility

Assignee

• PIERBURG GMBH · DE

Inventors

• Stephan Zielberg · Bochum, DE
• Michael-Thomas Benra · Castrop-Rauxel, DE
• Andreas Burger · Krefeld, DE
• Martin Nowak · Leverkusen, DE
• STEFAN ROTHGANG · Rheinberg, DE

Key dates

• Filing date: Oct 19, 2016
• Grant date: Aug 4, 2020
• Expiry date: Jan 21, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2270/64
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A coolant pump for an internal combustion engine. The coolant pump includes a delivery duct, a drive shaft, a coolant pump impeller arranged on the drive shaft to rotate therewith and to convey a coolant, and an adjustable control slide which controls a throughflow cross-section of an annular gap arranged between an outlet of the coolant pump impeller and the surrounding delivery duct. The control slide comprises a first pressure chamber arranged on a side of the control slide facing away from the coolant pump impeller and a second pressure chamber arranged opposite thereto. A control pump includes a control pump impeller arranged at the drive shaft to rotate therewith. A connecting duct fluidically connects the flow duct to the second pressure chamber. A pressure duct fluidically connects the flow duct outlet to the first pressure chamber. A valve opens and closes a throughflow cross-section of the pressure duct.