Method and control unit for operating a motor vehicle

US11174941B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Matthias Dietlmeier · Friedrichshafen, DE
• Michael Sohler · Isny im Allgäu, DE

Key dates

• Filing date: Jun 30, 2020
• Grant date: Nov 16, 2021
• Expiry date: Jun 30, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/1288
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A method for operating a motor vehicle with a prime mover (1), a transmission (2), a driven end (14), and a parking lock system (19) is provided. A shift element (9) of the transmission (2) and a parking lock actuator (21) of the parking lock system (19) utilize a common pressure control. When the shift element (9) is actuated with the aid of a pressure control effecting an at least partial engagement of the shift element (9) and when the pressure control is less than a limiting value for holding the parking lock system (19) in the disengaged position, the method includes monitoring a parking lock sensor (23) to determine whether the parking lock sensor (23) detects a movement of the parking lock actuator (21) or a signal corresponding to the movement of the parking lock actuator (21) despite a parking lock detent (22) having been actuated for locking.