Method and control device for operating a drive train

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12128903
APP PUB NO 20240300497A1
SERIAL NO

18573639

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A method for operating a drive train of a motor vehicle, where the drive train includes a drive aggregate, a group transmission connected between the drive aggregate and a drive output, and a separating cutch connected between the drive aggregate and the group transmission. If a speed is lower than a limit value, the separating clutch is opened and for transmission preselection one or all the other sub-transmission(s) is/are changed to a friction-force-locking condition. The separating clutch is then at least partially closed and the drive aggregate is brought to a defined rotation speed. When a friction-force-locking group transmission is required, it is checked whether a starting gearshift or a driver-desired shift for the group transmission is called for and the target rotation speed of the drive aggregate is checked. Depending on the results, the sub-transmission can be synchronized by a transmission brake or by the drive aggregate.

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Patent Owner(s)

Patent OwnerAddress
ZF FRIEDRICHSHAFEN AGLÖWENTALER STR 20 FRIEDRICHSHAFEN 88046

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fajfr, Martin Štěnovice, CZ 2 0
Norrenberg, Frieder Argenbühl, DE 2 0
Schlueter, Thea Friedrichshafen, DE 3 0
Steinborn, Mario Friedrichshafen, DE 68 360
Würthner, Maik Markdorf, DE 12 48

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