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DRIVE CONTROL APPARATUS AND DRIVE CONTROL METHOD FOR HYBRID VEHICLE

  • US 20110313602A1
  • Filed: 01/05/2009
  • Published: 12/22/2011
  • Est. Priority Date: 01/16/2008
  • Status: Active Grant
First Claim
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1. A drive control apparatus for a hybrid vehicle, comprising:

  • an engine;

    a motor-generator;

    a battery for supplying and receiving electric power to and from the motor-generator;

    a transmission configured to perform a normal operation and a shift change operation; and

    a controller configured to;

    detect the normal operation and the shift change operation of the transmission;

    determine a state of charge of the battery;

    calculate a target driving torque value and a basic engine torque value based on a driving condition of the vehicle;

    calculate a basic motor-generator torque value based on the basic engine torque value and the target driving torque value;

    set a target engine torque to be the basic engine torque value and set a target motor-generator torque as the basic motor-generator torque value when the state of charge of the battery is within an allowable range;

    set the allowable range of the state of charge of the battery to be smaller when the transmission is performing the shift change operation than when the transmission is performing the normal operation; and

    execute a basic value shift process when the state of charge of the battery deviates from the allowable range, wherein the basic value shift process suppresses deviation of the state of charge of the battery by shifting the target engine torque from the basic engine torque value and shifting the target motor-generator torque from the basic motor-generator torque value.

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