Method for operating a parallel hybrid powertrain of a vehicle with at least one internal combustion engine and at least one electric motor

US7770676B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Friedrich Tenbrock · Tettnang, DE
• Peter Schiele · Kreßbronn, DE
• Johannes Kaltenbach · Friedrichshafen, DE
• Bernd Allgaier · Kreßbronn, DE
• Christian Schwemer · Friedrichshafen, DE
• Michael Gromus · Friedrichshafen, DE
• Martin Neumann · Tettnang, DE
• Klaus Habe · Ravensburg, DE

Key dates

• Filing date: Apr 13, 2007
• Grant date: Aug 10, 2010
• Expiry date: Sep 22, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S903/946
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for operating a parallel hybrid powertrain (1) of a vehicle having one internal combustion engine (2) and one electric motor (3). The electric motor is located in the drivetrain between an output and the internal combustion engine. Between the internal combustion engine and the electric motor, a frictionally engaged shifting element is provided, while between the electric motor and the output, a starting element (6) having a hydrodynamic torque converter (6A) and a converter lock-up clutch (6B) is disposed. A target output torque to be applied to the output is dependent on the slippage of the starting element. During a starting phase of the internal combustion engine via the electric motor, an input torque produced by the electric motor is directed at least in part via the torque converter and in part via the converter lock-up clutch.