Method and apparatus for adapting motor vehicle drive slip thres

Details Method and apparatus for adapting motor vehicle drive slip thres Method and apparatus for adapting motor vehicle drive slip thres

1992-01-27

1994-10-18

Black, Thomas G.

Boots, shoes, and leggings

36442603, 180197, 303 93, 303 95, B60T 856

Patent

active

053574346

ABSTRACT:
An apparatus and method adapts response slip threshold values for a drive slip and/or a brake slip control system to the tires fitted to a motor vehicle. The drive torque provided at the driven vehicle wheels is determined from measured operating data such as fuel supply and/or combustion air supply, engine speed and total transmission ratio of the drive train of the vehicle. From this determination, the adhesion coefficient .mu..sub.a utilized is determined with a predetermined or measured axle load at the driven vehicle wheels. From the correlation of these adhesion coefficients .mu..sub.a with measured values of the drive slip .lambda..sub.a, the .mu. slip characteristic of the tires is determined and, corresponding thereto, the response slip thresholds .lambda..sub.A and .lambda..sub.B for the drive slip and the antiblocking control are set. A sliding averaging over the quotient .mu..sub.a /.lambda..sub.a of continuously determined .mu.a, .lambda..sub.a value pairs is utilized for recognizing the tire characteristic of summer/winter tires.

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