Patent · US Active

Method for controlling a hybrid drivetrain

US8062173B2 · kind B2 · utility

4Cited by

10References

10Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Bernd Allgaier · Kreßbronn, DE
Friedrich Tenbrock · Tettnang, DE
Thomas Lemp · Tettnang, DE
Michael Gromus · Friedrichshafen, DE

Key dates

Filing date	Jun 3, 2009
Grant date	Nov 22, 2011
Priority date	—
Expiry date	Jul 28, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/64
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A method for controlling a hybrid drivetrain of a motor vehicle such that, during a thrust operation of the vehicle, a change takes place from a combustion-powered driving mode, in which the combustion engine is in a thrust operation, the separator clutch is engaged and the electric machine contributes no force, or from a combined driving mode in which the engine is in a thrust operation, the clutch is engaged and the electric machine operates as a generator, to an electric driving mode in which the engine is switched off, the clutch is disengaged and the electric machine operates as a generator. To efficiently change driving modes, the clutch is partially disengaged to a slip limit; the clutch is then completely disengaged; and when the clutch reaches the slip limit, the generator torque of the electric machine is increased inversely to the torque that can be transmitted by the clutch.

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