Hydraulic circuit for a toroidal transmission

US7591755B2 · kind B2 · utility

Assignees

• GETRAG Getriebe- und Zahnradfabrik Hermann Hagen · DE
• Cie KG and Bayerische Motorenwerke Aktiengesellschaft · DE

Inventors

• Gunther Petrzik · St. Georgen, DE
• Andreas Wild · Weimar, DE
• Lothar Wolf · Munich, DE
• Thomas M. Kress · Dachau, DE

Key dates

• Filing date: Nov 10, 2006
• Grant date: Sep 22, 2009
• Expiry date: Jun 9, 2027

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/0037
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A hydraulic circuit for a toroidal transmission comprises: a) a single pump, b) a main pressure controller connected to the pump to generate a main line pressure in a main line, c) a roller controller connected to the main line to generate two roller control pressures from the main line pressure, d) at least one hydraulic roller actuator for adjusting a roller in a toroidal space set up by two disks, the roller actuator being connected to the roller controller, e) a disk controller connected to the main line, a disk control pressure being generated in the disk controller from the main line pressure, and f) at least one hydraulic disk actuator for axially adjusting at least one of the disks, the disk actuator being connected to the disk controller.