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Parallel hybrid vehicle

  • US 20030029653A1
  • Filed: 08/07/2002
  • Published: 02/13/2003
  • Est. Priority Date: 08/07/2001
  • Status: Active Grant
First Claim
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1. A hybrid vehicle, comprising:

  • an engine;

    a transmission;

    a motor/generator having both functions of an electric motor and a generator;

    a torque synthesis mechanism that synthesizes output torques of the engine and of the motor/generator;

    a lock-up clutch to directly couple the engine and the motor/generator; and

    a torque controlling section that controls a torque of the motor/generator in such a manner that an engine speed is maintained at a predetermined speed, with the lock-up clutch in anon-clutched state during a start of the vehicle, the torque controlling section comprising;

    an engine torque calculating section that calculates an engine torque; and

    a first torque calculating section that calculates a first torque to suppress a torsional vibration developed on a drive shaft according to the calculated engine torque.

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