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. 08, 2014
Filed:
Apr. 04, 2011
Markus Eisele, Friedrichshafen, DE;
Yvonne Wiegand, Nuremberg, DE;
Jurgen Blaser, Meckenbeuren, DE;
ZF Friedrichshafen AG, Friedrichshafen, unknown;
Abstract
A method for operating a drive-train of a motor vehicle with a drive aggregate in the form of a hybrid drive system () which comprises at least one electric machine (), an internal combustion engine (), a transmission (), a drive output () and a brake system which comprises at least one wear-free permanent brake (). When a braking torque is required, the braking torque is distributed between the electric machine () and the wear-free permanent brake (). At the beginning of a braking torque demand, the required brake torque is provided exclusively by the electric machine (). Thereafter, as a function of characteristics of the wear-free permanent brake, the braking torque demand is transferred, in a controlled manner, from the electric machine to the wear-free permanent brake () so that the sum of the braking torques provided at the drive output () corresponds to the required braking torque.