Kick down shift control apparatus of automatic transmission and method therefor

DETAILED DESCRIPTION It is an object of the present invention to solve the aforementioned problems and provide a kick down shift control apparatus of an automatic transmission and a method therefor, the apparatus which reduces its transmission oil pressure and relieve a shifting shock at the time of a kick down shift while the output of an engine is low due to a rising of an intake air temperature or an operation of a car air conditioner.
In order to accomplish the aforementioned object of the present invention, there is provided a kick down shift control apparatus of an automatic transmission of a vehicle, the apparatus comprising: vehicle running state sensing means for checking a running state of the vehicle; engine control means for controlling engine outputs in response to a signal sensed by the vehicle running state sensing means and outputting information on the temperature of intake air and the operational state of an air conditioner; shift control means for outputting a control signal to correct the pressure of transmission oil according to the temperature of intake air and the operational state of the air conditioner input from the engine control means, if conditions for a kick down shift are met with reception of the signal checked by the vehicle running state sensing means; and driving means for controlling the oil pressure discharged out by the oil pump according to the control signal output from the shift control means and performing a shift by providing the oil pressure for a relevant fiction factor.
In addition, there is also provided a method for controlling a kick down shift of an automatic transmission, the method comprising the steps of: discriminating whether conditions for a kick down shift are satisfied while a vehicle is in motion; discriminating whether the temperature of intake air is higher than a reference temperature if all the conditions are satisfied for the kick down shift; and adjusting a transmission oil pressure if the temperature of intake air is higher than the reference temperature, and performing the kick down shift with the adjusted transmission oil pressure