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VEHICLE CONTROL APPARATUS AND VEHICLE CONTROL METHOD

  • US 20120108387A1
  • Filed: 10/28/2011
  • Published: 05/03/2012
  • Est. Priority Date: 11/01/2010
  • Status: Active Grant
First Claim
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1. A vehicle control apparatus comprising:

  • an electric motor configured to output a torque for driving a vehicle;

    a clutch including an electric motor side element and a driving wheel side element, wherein the electric motor side element is connected to the electric motor and the driving wheel side element is connected to a driving wheel of the vehicle, wherein the clutch is configured to set according to hydraulic pressure a transmitted torque capacity for torque transmission between the electric motor side element and the driving wheel side element, and wherein the hydraulic pressure is regulated to a control setpoint; and

    a controller configured to set the control setpoint, wherein the controller is further configured to;

    implement a drive mode by allowing slippage between the electric motor side element and the driving wheel side element of the clutch and controlling rotational speed of the electric motor in a manner that the electric motor side element of the clutch rotates faster by a controlled difference than the driving wheel side element of the clutch;

    determine whether the vehicle is stationary;

    obtain an actual value of the output torque of the electric motor; and

    perform a procedure in response to determination that the vehicle is stationary when in the drive mode, wherein the procedure includes;

    a first operation of reducing the control setpoint from an initial point;

    a second operation of calculating a corrected point of the control setpoint based on a change of the actual value of the output torque of the electric motor with respect to the reduction of the control setpoint by the first operation;

    a third operation of setting the control setpoint to a precharge point after the first operation, wherein the precharge point is higher than the corrected point; and

    a fourth operation of setting the control setpoint to the corrected point after the third operation.

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