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:
Nov. 27, 2012
Filed:
Feb. 21, 2008
Maik Wurthner, Friedrichshafen, DE;
Werner Wolfgang, Ravensburg, DE;
Ingo Sauter, Meckenbeuren, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method for controlling a drive train of a motor vehicle comprising a drive engine, an automated transmission, and an automated clutch arranged in the force flow between the drive engine and the transmission. In order to achieve low component wear, a comfortable coasting operation mode and a spontaneous transition into the traction mode, it is provided that additional coast downshifts are prevented as soon as the driving speed (v) of the motor vehicle has reached or dropped below a previously defined threshold speed (v) for coast downshifts (v<=v), or the currently engaged gear (G) corresponds to a previously defined limit gear (G) for coast downshifts (G=G) and, after dropping below the threshold speed (v) or after engaging the limit gear (G), a transition into the traction mode is prepared by determining a current target gear (G) and an associated shifting speed (n) of an adaptive shift for the transition into the traction mode as a function of the driving speed (v) of the motor vehicle and/or the engine speed (n) of the drive engine.