Process for determining wheel speed signal correction factors

US5929329A · kind A · utility

Assignee

• ITT MANUFACTURING ENTERPRISES LLC · US

Inventors

• Dieter Burkhard · Pirmasens, DE
• Manfred Dornseiff · Hallenberg, DE
• Robert Kyle Schmidt · Liederbach am Taunus, DE
• Jean-Claude Schwartz · Frankfurt am Main, DE

Key dates

• Filing date: Apr 28, 1997
• Grant date: Jul 27, 1999
• Expiry date: Apr 28, 2017

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T2240/08
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present invention discloses a method of determining correction factors by which the different tire-tread circumferences are ascertained and compensated, wherein a short-time correction factor (KZ.sub.Rn) and a long-time correction factor (LZ.sub.RN) is developed for each wheel, the deviation (D.sub.Rn) of the short-time correction factor from the long-time correction factor is determined and the deviation is weighted by way of a band-pass filter (3), wherein subsequently a long-time average value (LM.sub.Rn) of the weighted deviation (D'Rn) is developed, and a partial value (TW.sub.Rn) of the long-time average value (LM.sub.Rn) is assessed, as a function of the driving condition, for the correction and adaption of the long-time correction factor (LZ.sub.Rn).