Gearbox of a motor vehicle and method for operating a motor vehicle

US10940749B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Michael Preuß · Friedrichshafen, DE
• Johannes Kaltenbach · Friedrichshafen, DE
• Christian Mittelberger · Ravensburg, DE
• Johannes Glückler · Friedrichshafen, DE
• Stefan Renner · Leonberg, DE
• Rayk Gersten · Friedrichshafen, DE

Key dates

• Filing date: Nov 22, 2016
• Grant date: Mar 9, 2021
• Expiry date: Oct 25, 2037

Classification

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

Abstract

A method of operating a vehicle having a hybrid drive, a transmission with shift elements, a drive output with a brake, a main transmission with input shafts, an output shaft and planetary gear sets (PG1, PG2). The main transmission has five gear planes. One shift element can connect a gear plane to an element of gear set (PG1) adjoining the main transmission. Another shift element couples a further element of gear set (PG1) either to the output shaft or a housing. An electric machine is permanently connected to an element of gear set (PG2). If, while driving with a transmission gear engaged, the drive output brake is engaged for a full brake application, a shift element of the transmission is first relieved by the electric machine and/or a brake assigned to one of the input shafts and then subsequently disengaged to decouple the combustion engine from the drive output.