Patent · US Active

Starting method for internal combustion engines with a double clutch transmission

US7704189B2 · kind B2 · utility

3Cited by

5References

7Claims

0Family size

Assignee

Dr. Ing. h.c. F. Porsche AG · DE

Inventors

Peter Baur · Monsheim, DE
Joachim Esser · Aachen, DE
Christian Hauck · Burgthann, DE
Dieter Kraxner · Wurmberg, DE

Key dates

Filing date	Apr 30, 2007
Grant date	Apr 27, 2010
Priority date	—
Expiry date	Apr 2, 2028

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/19288
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A method implements a starting process for an internal combustion engine which has a drive unit and a transmission with at least two transmission input shafts and a multiple clutch device, in particular a double clutch device. During the starting process, the first gear is engaged in a first clutch of the multiple clutch device and is activated, while the second gear speed is engaged in a second clutch of the multiple clutch device but not activated. During the starting process, a current velocity is compared with a predefinable reference velocity, and when the reference velocity is reached a control unit causes the first clutch to be opened and thus causes the first gear to be deactivated while, in parallel with this, the second clutch is closed and the second gear is thus activated.

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