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System and method for improved vehicle response during vehicle acceleration conditions

  • US 7,917,275 B2
  • Filed: 03/07/2006
  • Issued: 03/29/2011
  • Est. Priority Date: 03/07/2006
  • Status: Active Grant
First Claim
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1. A vehicle control method for a vehicle having an internal combustion engine coupled to a torque converter, the torque converter having an input speed and an output speed, the torque converter coupled to a transmission, the transmission coupled to wheels on a road, the method comprising:

  • in response to a driver tip-out, decreasing powertrain output so that positive torque is not transmitted to the wheels; and

    after said tip-out and in response to a driver tip-in under a first operating condition,increasing engine airflow while performing ignition timing more advanced than a first ignition timing to increase torque converter input speed toward torque converter output speed;

    further increasing engine airflow while performing ignition timing more retarded than said first ignition timing to limit a torque increase during a transition from torque converter input speed less than torque converter output speed to torque converter input speed greater than torque converter output speed; and

    thenfurther increasing engine airflow while performing ignition timing more advanced than said first ignition timing to provide a torque output increase.

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