Circuit configuration and method for controlling a traction slip control system with brake and/or engine management
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United States of America Patent
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May 16, 1995
Grant Date -
N/A
app pub date -
Sep 7, 1993
filing date -
Nov 17, 1990
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Abstract
A circuit configuration and method for a traction slip control system which evaluates the speed (v.sub.ER) measured at a driven spare wheel with a correction factor K(t) in order to maintain or improve the control function even when a smaller size spare wheel has been mounted. This correction factor (K(t)) is determined by axlewise comparison of the rotating speeds (v.sub.na1, v.sub.na2 ; v.sub.a, v.sub.ER) of the wheels of one axle and by comparison of the speed differences measured on the driven and nondriven axles, with traction slip control being inactive. Upon transition from a very slippery road surface (.mu..sub.low homogeneous) to a dry road surface (.mu..sub.high homogeneous), without any prior determination of the correction factor, the slip threshold (S) is raised temporarily. When starting with different right/left friction coefficients (.mu.-split), with the spare wheel being mounted on the high friction coefficient side, a higher slip threshold (S.sub.ER) will be effective for this spare wheel.
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