Profiled vehicle tire and method for dimensioning the optimum phase offset between adjacent tread portions

US5746848A · kind A · utility

Assignee

• Continental AG · DE

Inventors

• Thomas Schulze · Rudolstadt, DE
• Geert Roik · Lehre, DE
• Michael Hahn · San Francisco, US
• Klaus Kleinhoff · Rodenberg, DE

Key dates

• Filing date: Sep 27, 1994
• Grant date: May 5, 1998
• Expiry date: Sep 27, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T156/1023
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A vehicle tire having a profiled tread on the periphery of which are arranged pitches of at least two different lengths. In an axial direction, the tread is divided into several parts, with the successive pitch length in a given axial part forming a pitch sequence. To further reduce radial force fluctuations that induce vibrations by the transmission of noise into wheel suspension and body parts, the phase offset between the pitch sequences of the various tread parts is dimensioned such that the distance between the absolute extremes of the summation of weighted representations of a given function is minimal or at most 25% greater than this minimum. Each of the tread parts have associated therewith a function that is the successive plotting of successive pitch lengths of the pertaining tread part on the abscissa while marking off the respective pitch length, starting from the abscissa, onto the ordinate. From each of these functions a "representation" is determined that is what remains after elimination of all harmonic parts of greater than the x order, with "x" being an integer between 8 and 14. To determine this remainder, the function is first harmonically analyzed from the firs…