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System and method of controlling motor vehicle operation

  • US 9,108,623 B2
  • Filed: 10/24/2012
  • Issued: 08/18/2015
  • Est. Priority Date: 10/25/2011
  • Status: Active Grant
First Claim
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1. A method of controlling motor vehicle operation, comprising:

  • setting, by a control unit, a creep torque as a minimum torque;

    setting, by the control unit, a maximum torque as a sum of a maximum torque of an engine and a maximum torque of a motor;

    monitoring, by the control unit, a pedal position sensor (PPS) value;

    calculating, by the control unit, a demand torque based on the PPS value;

    setting, by the control unit, a filter coefficient for filtering the demand torque based on an operating condition of the vehicle; and

    filtering, by the control unit, the demand torque with the filter coefficient,wherein the operating condition is selected from the group consisting of a traction control system (TCS), an electronic stability program (ESP), a state of charge (SOC), a rate of change of an accelerator pedal position sensor (APS) value, a rate of change of a brake pedal position sensor (BPS) value, and a current driving mode,wherein when a control flag for the ESP is turned on, the filter coefficient is set to a minimal value to rapidly change the demand torque,wherein when the SOC is substantially low, the filter coefficient is set to a larger value to decrease the change of the demand torque,wherein each possible operating condition is assigned a priority value,wherein the filter coefficient is set to correspond to the operating conditions with highest priority values, andwherein the operating condition with the highest priority value is the ESP.

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