| 摘要 |
PROBLEM TO BE SOLVED: To avoid an inappropriate driving power distribution control when the air gap for an armature of an electromagnetic clutch is reduced. SOLUTION: A target exciting current computing means M2 computes a target exciting current It based on a target tightening force Tt of electromagnetic clutches CL, CR computed by a target tightening force computing means M1. A feedback control means M3 feedback-controls the current to be supplied to coils 22L, 22R of the electromagnetic clutches CL, CR so that an actual exciting current I detected by current sensors 37L, 37R coincides with the target exciting current It. When a drive power distribution control is not executed, a specified current is supplied to the electromagnetic clutches CL, CR, so that the air gap estimate means M4 estimates the air gapαbased on the output of the then magnetic flux density sensors 35L, 35R. When the estimated air gapαis less than the specified value, a means for interrupting drive power distribution control M5 interrupts the drive power distribution control.
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