Transmission for a motor vehicle, drive train and method for operating a transmission

US11254199B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Martin Brehmer · Tettnang, DE
• Stefan Beck · Eriskirch, DE
• Anton Fritzer · Markdorf, DE
• Suryanto Hendrawan · Konstanz, DE
• Matthias Horn · Tettnang, DE
• Johannes Kaltenbach · Friedrichshafen, DE
• Raffael Kuberczyk · Ravensburg, DE
• Jens Moraw · Friedrichshafen, DE
• Gerhard Niederbrucker · Friedrichshafen, DE
• Martin Rattay · Ravensburg, DE
• Matthias Reisch · Ravensburg, DE
• Wolfgang Rieger · Friedrichshafen, DE
• Thomas Rosemeier · Meckenbeuren, DE
• Lara Ruth Turner · Markdorf, DE
• Bernd Unseld · Ravensburg, DE
• Viktor Warth · Friedrichshafen, DE
• Michael Wechs · Weißensberg, DE
• Peter Ziemer · Tettnang, DE
• Oliver Bayer · Hörbranz, AT

Key dates

• Filing date: Dec 5, 2018
• Grant date: Feb 22, 2022
• Expiry date: Dec 5, 2038

Classification

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

Abstract

A transmission (G) includes an input shaft (GW1), an output shaft (GW2), an electric machine (EM), a plurality of planetary gear sets (P1-P3; 2P1-2P5), and gear-implementing shift elements (S1-S6; 2S1-2S5). Via engagement of a first of the gear-implementing shift elements (S1, 2S1), which is a force-locking shift element having a variable torque transmission capacity, the input shaft (GW1) and an element (E1, 22E1) of one of the planetary gear sets (P3; 2P4) can be brought into a fixed rotational speed relationship with respect to each other. Another element (E2, 22E2a, 22E2b) of one of the planetary gear sets (P1, 2P3, 2P5) is permanently connected to a rotor (R) of the electric machine (EM). By engaging an auxiliary shift element (ZS, 2ZSa, 2ZSb), which is a form-locking shift element, the rotor (R) and the input shaft (GW1) can be brought into a fixed rotational speed relationship with respect to each other.