Patent · US Active

Method for operating a vehicle drive train during a starting process

US9011290B2 · kind B2 · utility

0Cited by

3References

20Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Stephan Schinacher · Egesheim, DE
Marcus Hiemer · Karlsruhe, DE
Timo Maise · Ludwigsburg, DE
Jan-Frederik KUHN · Friedrichshafen, DE

Key dates

Filing date	Oct 29, 2013
Grant date	Apr 21, 2015
Priority date	—
Expiry date	Oct 29, 2033

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60W30/18027
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A method of operating a vehicle drive-train during a starting process. The drive-train has a drive mechanism which can couple a continuously-variable power-branched transmission in which a plurality of transmission ratios can be engaged. The transmission ratios can be varied continuously by adjusting a variator, the transmission driving a drive output. A force flow between the drive mechanism and the drive output can be produced by a frictional shifting element by appropriately adjusting the transmission capacity of the shifting element. When a start command is issued, a starting transmission ratio is engaged in the area of the transmission device. During the engagement of the starting transmission ratio the transmission capacity of the frictional shifting element is adjusted to values greater than zero.

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