Patent ID: 6196640
Filing Date: 2001-03-06
Classification: B60T

Abstract:
A method for the coordination of braking forces between two units connected to one another in a vehicle train, each of the two units including a braking system which produces a braking force when imparted a braking control value, comprising the steps of:setting a braking control value for transmission between the two units and a braking control value for the braking system of each of the two units, each said braking control value being based upon a starting value upon start-up;obtaining slip-encumbered wheel signals from wheels located on each of the two units;deriving a unit speed for each of the two units from said slip-encumbered wheel signals corresponding to a respective one of the two units;determine a derivative over time for each of the two units measured as a deceleration of said unit speed for each of the two units;calculating a differential value at least during a time segment of a brake application, said differential value being a difference between each said derivative over time; andaltering said braking control value for the braking systems of at least one of the two units on condition that a calculated value of said differential value lies outside a range defined by a predetermined lower limit and a predetermined upper limitwherein one of the two units is a reference unit for the remaining second unit of the two units, the method further comprising:decreasing said braking control value for transmission between the two units as a function of said braking control value for the braking system of said reference unit when said differential value exceeds said predetermined upper limit; andincreasing said braking control value for transmission between the two units as a function of said braking control value for the braking system of said reference unit when said differential value is less than said predetermined lower limit.