Method for controlling a shiftable planetary gear set in a belt pulley plane of a drivetrain

US8690723B2 · kind B2 · utility

Assignee

• Schaeffler Technologies AG & Co. KG · DE

Inventors

• Martin Dilzer · Laufenburg (Baden), DE
• Dierk Reitz · Baden-Baden, DE

Key dates

• Filing date: Jun 24, 2013
• Grant date: Apr 8, 2014
• Expiry date: Jun 24, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/62
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for controlling a belt drive of a drivetrain of a motor vehicle, with a planetary gear set which shifts a transmission ratio between a starter-generator and a combustion engine, the planetary gear set having a ring gear which can be connected fixedly with respect to a housing by a brake, a web which is connectible to a crankshaft of the combustion engine of the drivetrain, having planet gears arranged around the circumference, and a sun gear which is connected in a rotationally fixed connection to a rotor of the starter-generator and to at least one ancillary unit, as well as having a first switchable free-wheeling mechanism which blocks in the direction of torque from the rotor to the crankshaft and having a second switchable free-wheeling mechanism which blocks in the direction of torque from the crankshaft to the rotor.