Process for monitoring the condition of motor vehicle wheels

US6959234B2 · kind B2 · utility

Assignee

• Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

• Serge Vos · Munich, DE
• Markus Wimmer · Höchst im Odenwald, DE
• Wolfgang Zimprich · Ismaning, DE
• Marcus Jautze · Munich, DE

Key dates

• Filing date: Sep 26, 2002
• Grant date: Oct 25, 2005
• Expiry date: Nov 15, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G01P3/489
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A process and device for monitoring the state of a wheel of a motor vehicle in which an output signal of a sensor is converted into an essentially rectangular pulse signal. A respective duration of the pulse is measured; and an especially weighted average between the duration of a current value and a preceding value is determined, wherein a current value and a preceding value exhibit a time interval and/or lie a specific step size apart. A correction factor is determined from each deviation between the duration of a current value and a respective mean value. A step size of the correction method is matched to an error order of a fault. Preferably the step size with a periodic deviation of the mth order that is to be eliminated is determined according to the formula j=1/m×n/4; for motor vehicles in particular according to the formula j=1/m×12.