| 摘要 |
PROBLEM TO BE SOLVED: To provide a wheel diametrical difference detection device to precisely find a diametrical difference regardless of a road surface state. SOLUTION: A diametrical difference is precisly found by adding influence of a road surface friction coefficientμin comparison with a case of using an input output rotating speed difference of an electromagnetic clutch 30 or an input output rotating speed ratio simply at the time of rectilinear traveling, as the diametrical difference (diametrical difference correction coefficient kik) of a wheel is decided in accordance with input torque tin computed by an input torque computing means 122, by a diametrical difference deciding means 242. That is, a slipping state of the wheel differs according to the size of torque applied to the wheel, and as torque applied on the wheel and the torque tin of the electromagnetic clutch 30 are closely related with each other, and accordingly their influence is taken into consideration.
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