METHOD AND CONTROL UNIT FOR OPERATING A DRIVE TRAIN OF A HYBRID VEHICLE

WIPO Patent Application WO/2012/097910

A3

The invention relates to a method for operating a drive train of a hybrid vehicle, wherein the drive train comprises at least one hybrid drive having an internal combustion engine (1) and an electric motor (2), an automatic or semi-automatic transmission (3) connected between the hybrid drive and an output (4), and a clutch (5) connected between the internal combustion engine (1) and the electric motor (2), namely, for starting the internal combustion engine (1) from an electric-only drive mode with an initially open clutch (5). In order to start the internal combustion engine (1), the clutch (5) is at least partially closed and the internal combustion engine is tow-started via the electric motor (2), wherein a downshift of the transmission (3) simultaneously with the starting of the internal combustion engine (1) is initiated when a rotational speed of the internal combustion engine (1) reaches or exceeds an applicable threshold value.

JP5552997	A control device of electric vehicles
JP5691383	Vehicle travel control device
JPH10291421	HYBRID POWER TRAIN

ALLGAIER BERND (DE)
PETER PATRICK (DE)
KUHN CLEMENS (DE)
BACHER HOLGER (DE)
ZOELLNER TOBIAS (DE)
FEHRENBACH LORENZ (DE)

PCT/EP2011/071824

September 20, 2012

December 06, 2011

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ZAHNRADFABRIK FRIEDRICHSHAFEN (DE)
ALLGAIER BERND (DE)
PETER PATRICK (DE)
KUHN CLEMENS (DE)
BACHER HOLGER (DE)
ZOELLNER TOBIAS (DE)
FEHRENBACH LORENZ (DE)

B60K6/48; B60L50/16; B60W20/00; B60W30/192; B60W10/02; B60W10/06; B60W10/11; F16H61/16

FR2923792A1	2009-05-22
EP1762417A1	2007-03-14
DE102008040692A1	2010-01-28

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