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Method and apparatus for controlling an electromagnetic clutch for use on a vehicle

  • US 4,623,052 A
  • Filed: 08/06/1984
  • Issued: 11/18/1986
  • Est. Priority Date: 08/06/1983
  • Status: Expired due to Term
First Claim
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1. A method of controlling an electromagnetic clutch which is incorporated in a power transmission system of a vehicle to transmit an output of an engine to drive wheels, and which includes a solenoid, said method comprising the steps of:

  • detecting a required output of said engine;

    determining a target speed of said engine, based on the detected required output of the engine, and according to a predetermined relation between said target speed and said required output of the engine;

    applying an electric current to said solenoid to effect an engaging action of the electromagnetic clutch to transmit a torque of the engine to the drive wheels; and

    controlling a magnitude of said electric current to be applied to said solenoid during a period of said engaging action of the electromagnetic clutch, to vary the torque to be transmitted by said clutch, as a function of the controlled magnitude of said electric current, such that an actual speed of the engine coincides with the determining target speed of the engine.

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