Temperature detection for electromagentic clutch of vehicle

A temperature detection device for an electromagnetic clutch of a vehicle comprising:

• clutch output circuit operation detection means for detecting an output terminal voltage of said electromagnetic clutch and a source voltage,
• clutch current calculation means, responsive to running control information and engine control information, for providing a clutch current instruction signal and a clutch open signal, said clutch current calculation means comprising means, responsive to the electromagnetic clutch output terminal voltage and the source voltage fed back from said clutch output circuit operation detection means, for calculating a clutch voltage from voltage drops in a wiring and a feeding mechanism of said electromagnetic clutch, and said clutch current calculation means further comprising means, responsive to said clutch voltage and a clutch current instruction value corresponding to the clutch current instruction signal, for calculating a clutch resistance to thereby calculate a clutch temperature, and
• clutch current control means, responsive to a deviation between the clutch current instruction signal and current feedback signal corresponding to the clutch current, and to the open signal, for controlling the clutch current of said electromagnetic clutch.