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. 19, 2025
Filed:
Jul. 11, 2023
Zf Friedrichshafen Ag, Friedrichshafen, DE;
Jürgen Legner, Friedrichshafen, DE;
ZF FRIEDRICHSHAFEN AG, Friedrichshafen, DE;
Abstract
A method for operating an electrified drive train including a drive motor, inverter, and accelerator pedal. The drive motor provides a motor speed and torque according to a position of the accelerator pedal. The inverter detects a motor mode when a motor torque greater than a threshold motor torque is provided. The inverter detects a generator mode when a generator torque greater than a threshold generator torque is provided. The inverter detects a torque-free state of the drive motor when the generator torque is less than the threshold generator torque and the motor torque is less than the threshold motor torque. Each position of the accelerator pedal is assigned a respective maximum motor speed, and a motor fault is detected when a motor speed above an assigned speed is detected and, at the same time, a motor mode of the drive motor is detected.