Patent ID: 6543595
Filing Date: 2003-04-08
Classification: B60K,F16D,F16H

Abstract:
A driving force distribution device for a vehicle comprising;magnetic flux density detecting means for detecting a magnetic flux density which flows in electromagnetic clutches, current detecting means for detecting an excitation current which flows in the electromagnetic clutches, and control means for determining target engagement forces of the electromagnetic clutches and controlling the engagement forces of the electromagnetic clutches, distribution of the driving force being carried out between driving wheels of the vehicle by means of the electromagnetic clutches, wherein the control means determines a relationship between the excitation current and the magnetic flux density based on the magnetic flux density detected by the magnetic flux density detecting means when a predetermined excitation current is applied to the electromagnetic clutches when the clutches are not being controlled for driving force distribution, converts a target magnetic flux density corresponding to the target engagement force into a target excitation current based on the determined relationship between the excitation current and the magnetic flux density when the electromagnetic clutches are controlled for force distribution, and carries out current feedback control so that the excitation current flowing in the electromagnetic clutches detected by the current detecting means converges to the target excitation current.