Method for determining the absolute angular position of the steering wheel of motor vehicle

US6571159B2 · kind B2 · utility

Assignee

• Leopold KOSTAL GmbH & Co. KG · DE

Inventors

• Frank Blasing · Werl, DE
• Christian Schirp · Bochum, DE

Key dates

• Filing date: May 30, 2002
• Grant date: May 27, 2003
• Expiry date: May 30, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D3/08
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for determining the absolute angular position of a motor vehicle steering wheel includes using a sensor to continually detect first angular measured values of the steering wheel at a constant first interval. A controller outputs encoded output values based on the detected first angle measured values. At high steering wheel rotational speeds the difference between two consecutively measured angular values becomes increasingly greater as a result of the constant measuring rate of the first interval. At such high rotational steering wheel speeds, the method achieves a reliable angular measurement which is verifiable by plausibility considerations by detecting at least one additional second angular measured value of the steering wheel for each output value. The additional second angular measured is detected at a second interval shorter than the first interval and lying between the detection times of successive first angular measured values.