Patent · US Active

Method for operating a drive train

US8690724B2 · kind B2 · utility

0Cited by

5References

8Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Markus Eisele · Friedrichshafen, DE
Yvonne Wiegand · Mainstockheim, DE
Jürgen Blaser · Meckenbeuren, DE

Key dates

Filing date	Apr 4, 2011
Grant date	Apr 8, 2014
Priority date	—
Expiry date	Apr 4, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/7072
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A method for operating a drive-train of a motor vehicle with a drive aggregate in the form of a hybrid drive system (3) which comprises at least one electric machine (2), an internal combustion engine (1), a transmission (5), a drive output (4) and a brake system which comprises at least one wear-free permanent brake (6). When a braking torque is required, the braking torque is distributed between the electric machine (2) and the wear-free permanent brake (6). At the beginning of a braking torque demand, the required brake torque is provided exclusively by the electric machine (2). Thereafter, as a function of characteristics of the wear-free permanent brake, the braking torque demand is transferred, in a controlled manner, from the electric machine to the wear-free permanent brake (6) so that the sum of the braking torques provided at the drive output (4) corresponds to the required braking torque.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.