Method for indirect tire pressure monitoring

US7991523B2 · kind B2 · utility

Assignee

• Continental Teves AG & Co. OHG · DE

Inventors

• Martin Grieβer · Eschborn, DE
• Andreas Köbe · Bensheim, DE
• Frank Edling · Yokohama, JP
• Vladimir Koukes · Darmstadt, DE
• Jörg Cunz · Bad Homburg vor der Höhe, DE
• Lennert Gootjes · Hannover, DE
• Joachim Kohn · Hannover, DE
• Ines Runge · Henstedt-Ulzburg, DE
• Maik Hofmann · Gaimersheim, DE

Key dates

• Filing date: Feb 2, 2005
• Grant date: Aug 2, 2011
• Expiry date: Jan 12, 2027

Classification

• Technology area (CPC G): Physics
• CPC primary: G01M17/025
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Disclosed is a method of indirect tire pressure monitoring. The method includes: learning test variables (DIAG, SIDE, AXLE), which describe the rotational movements of the wheels; determining rolling circumference differences (ΔDIAG, ΔSIDE, ΔAXLE) from actually determined test variables and the learnt test variables; learning at least one torsion natural frequency fp for at least one tire from the oscillation behavior of the individual tires; determining at least one shift of the torsion natural frequency Δfp from at least one actually determined torsion natural frequency and from the at least one learnt torsion natural frequency; and combining the rolling circumference differences (ΔDIAG, ΔSIDE, ΔAXLE) with the at least one shift of the torsion natural frequency fp in a joint warning strategy for detecting and warning of tire inflation pressure loss.