Method for circuit separation testing in a double gearwheel pump

US9109970B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Georg Blosch · Murr, DE
• Norbert Alaze · Markgröningen, DE

Key dates

• Filing date: Jan 31, 2011
• Grant date: Aug 18, 2015
• Expiry date: Apr 16, 2031

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C2270/80
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for circuit separation testing in a double gearwheel pump having two gearwheel pumps includes charging one of the two gearwheel pumps with pressure and measuring the pressure build-up in the charged gearwheel pump and/or the pressure-build up in the other gearwheel pump. The pressure build-up is preferably realized by the gearwheel pump itself. The gearwheel pumps have a common pump shaft and are preferably configured as hydraulic pumps of a hydraulic vehicle brake system with slip control. The method detects any leak at the leadthrough of the pump shaft through a partition wall between the two gearwheel pumps.