Method for detecting undesirable vibrations of an actuator of an electromechanical brake, electronically controlled braking system, computer program product, control unit and motor vehicle

US11590958B2 · kind B2 · utility

Assignee

• ZF Active Safety GmbH · DE

Inventors

• Andreas Müller · Wadgassen, DE
• Ralf Kinder · Eitelborn, DE

Key dates

• Filing date: Oct 26, 2020
• Grant date: Feb 28, 2023
• Expiry date: Sep 9, 2041

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2066/005
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for detecting undesirable vibrations of an actuator of an electromechanical brake includes the steps of: (1) providing an electrical signal comprising at least one piece of information about a current consumption of the actuator or a parameter correlated with the current consumption; (2) monitoring an operation of the actuator on the basis of the gradient of the electrical signal in such a way that after switching on the actuator and preferably after a subsequent delay time, which includes determining: whether the amount of an initial instantaneous value of the gradient exceeds the amount of a threshold and whether a subsequent second instantaneous value of the gradient has an inverted sign compared to the first instantaneous value; (3) evaluating the results to ensure that an undesirable vibration is assessed as detected the aforementioned conditions are met.