BRAKING PRESSURE THRESHOLD LIMITING METHOD OF BRAKE TRACTION CONTROL SYSTEM

摘要

Disclosed is a braking pressure threshold setting method of a brake traction control system. The method includes steps of: determining whether a slip occurs in a driving wheel; initiating a BTCS control when the slip occurs in the driving wheel; determining whether instability occurs in a high-frictional driving wheel; cumulatively calculating a braking pressure applied to the low-frictional driving wheel; comparing the cumulatively calculated braking pressure value and a pre-set braking pressure threshold of the low-frictional driving wheel; and, when the cumulatively calculated braking pressure value exceeds the pre-set braking pressure threshold of the low-frictional driving wheel, setting the braking pressure applied to the low-frictional driving wheel when the slip occurs in the high-frictional driving wheel, as the threshold. Thus, it is possible to prevent the braking pressure exceeding the pre-set threshold from being applied to the low-frictional driving wheel when climbing a slope road formed with a split road surface such that a climbing performance can be improved.

主权项

1. A braking pressure threshold setting method of a brake traction control system, the method comprising:
a driving wheel slip determination step of determining whether a slip occurs in a driving wheel by detecting the slip of the driving wheel; a Brake Traction Control System (“BTCS”) control determination step of determining whether a BTCS control of a low-frictional driving wheel is being performed after the driving wheel slip determination step; a high-frictional driving wheel's instability determination step of determining whether instability occurs in a high-frictional driving wheel by detecting the slip in the high-frictional driving wheel during the BTCS control; a breaking pressure cumulative-calculation step of consistently and cumulatively calculating a braking pressure applied to the low-frictional driving wheel for a predetermined period when the instability occurs in the high-frictional driving wheel; a comparison step of comparing the consistently and cumulatively calculated breaking pressure value with a pre-set braking pressure threshold of the low-frictional driving wheel; and a step of setting, when the cumulatively calculated braking pressure value exceeds the pre-set braking pressure threshold of the low-frictional driving wheel, the braking pressure, which is applied to the low-frictional driving wheel when the slip occurs in the high-frictional driving wheel, as a low-frictional driving wheel braking pressure threshold stored as a low-frictional driving wheel brake control value.