The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 2012
Filed:
May. 11, 2009
Joachim Esser, Rutesheim, DE;
Joachim Esser, Rutesheim, DE;
Dr. Ing. h.c. F. Porsche Akteingesellschaft, Stuttgart, DE;
Abstract
A method controls a drivetrain of a motor vehicle having an internal combustion engine, an automatic transmission with at least two discrete transmission stages, and a clutch which is controlled automatically. The method is characterized in that when there is a transmission output speed at which the transmission input speed in an n-th transmission stage would be above a minimum rotational speed of the internal combustion engine and a transmission input speed in an (n+1)-th transmission stage would be below the minimum rotational speed, the drivetrain is operated in the (n+1)-th transmission stage with a slipping clutch and a rotational speed of the internal combustion engine which is above the minimum rotational speed. A control unit is configured to carry out such a method.