| 摘要 |
PROBLEM TO BE SOLVED: To accurately control a target fastening force of a fastening force of an electromagnetic clutch with a simple structure even when an air gap of the electromagnetic clutch fluctuates. SOLUTION: A target magnetic flux density calculating means M2 calculates a target magnetic flux density ϕt based on the target fastening force Tt of the electromagnetic clutches CL and CR calculated by a target magnetic flux density calculating means M1, and a feedback control means M3 carries out a feedback control of a current supplied to the electromagnetic clutches CL and CR such that a real magnetic flux density ϕ detected by magnetic flux sensors 35L and 35R corresponds to the target magnetic flux density ϕt. Accordingly, even when the air gap is varied by abrasion or the like of a friction engaging member and a relation of the real magnetic flux density with respect to the current supplied to the electromagnetic clutches CL and CR changes, the real magnetic flux density is made to accurately correspond with the target magnetic flux density, thereby generating the target fastening force in the electromagnetic clutches CL and CR. |
