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:
Aug. 14, 2012
Filed:
Jan. 16, 2007
Stefan Wallner, Friedrichshafen, DE;
Notker Amann, Friedrichshafen, DE;
Stefan Wallner, Friedrichshafen, DE;
Notker Amann, Friedrichshafen, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method for controlling a drivetrain including a combustion engine, electric motor/generator and a transmission inter-coupled, via a summarizing gear, with one output and two input elements and, via a clutch, with each other. One input element is fixed to the engine, the second input element is fixed to the motor/generator and the output element is fixed to the input shaft of the transmission. The clutch is between two elements of the summarizing gear. Before a gearshift, torques of the engine and motor/generator are reduced and the clutch disengaged. To quickly reduce torque in the summarizing gear, the engine torque is reduced after a defined time, such that the clutch disengages when the slippage is proportional to the lowering engine torque and the motor/generator torque, in a ratio of torques at the beginning of torque reduction, is reduced proportionally to the engine torque.