Vehicle air conditioning control system

Abstract

To determine whether or not integral control is performed when a requested compressor output value is limited by an upper or lower limit, based on an evaporator temperature deviation, prevent divergence of an integral value, and make an evaporator temperature follow a target evaporator temperature during the integral control, an evaporator temperature deviation calculation means, integral control means for calculating an integral value based on an evaporator temperature deviation, and output value calculation means for calculating a requested compressor output value based on the integral value and limiting the requested compressor output value to calculate a compressor output value are provided.

1 . A vehicle air conditioning control system comprising:
 evaporator temperature deviation calculation means for calculating a difference between an evaporator temperature and a target evaporator temperature as an evaporator temperature deviation;   integral control means for calculating an integral value based on the evaporator temperature deviation calculated by the evaporator temperature deviation calculation means; and   output value calculation means for calculating a requested compressor output value based on the integral value calculated by the integral control means and limiting the requested compressor output value to calculate a compressor output value, wherein   the integral control means halts integral control when the requested compressor output value is limited, and   the integral control means does not halt the integral control if the evaporator temperature deviation is not less than 0 when the requested compressor output value is limited by a lower limit, and does not halt the integral control if the evaporator temperature deviation is less than 0 when the requested compressor output value is limited by an upper limit.