| 摘要 |
PURPOSE: To rapidly perform the adaption by adapting a response slip threshold values for a drive slip or brake slip control system by determining the driving torque on the basis of the operating data of a vehicle, and determining the frictional coefficient to be utilized on the basis of the tire frictional coefficient-slip characteristic curve. CONSTITUTION: An electronic processing unit 48 inputs the vehicle operation data such as the rotational frequency of a crank shaft from a rotational frequency sensor 51, the charging efficiency of the air for combustion from a hot wire anemometer 54, the rotational frequency of wheels from the wheel rotational frequency sensors 31, 32 and the axle load LHA obtained from the output of a position sensor of a suspension system or the like to determine the driving torque, and further calculates the frictional coefficientμa to be utilized in the axle load LHA in the drive wheel on the basis of an expression FZ/FHA. This FZ is the tractive force of the power transmission system 10 represented by a ratio of the propulsion torque MZ of the power transmission system 10 added through a travelling path and a dynamic rolling radius rdyn of the drive wheel (MZ/rdyn ). From the correlation of this frictional coefficientμa and the measured drive slip, the tire frictional coefficient-slip characteristic curve is determined to determine the response slip threshold value corresponding thereto.
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